Device for monitoring and controlling liquid level

FIELD: physics; control.

SUBSTANCE: invention relates to automation of manufacturing processes in machine building and is meant for automating technological processes related to monitoring and controlling liquid media. The device is made in form of two functional assemblies and has three terminals for programming its functionalities and four outputs. The device has two level sensors, two multivibrators, capacitors, two detectors, two sensitivity controllers, two threshold elements, a differentiator, a JK flip-flop, a unit for establishing initial state, two repeaters and two display units. When the first and second programming terminals are closed and when the third programming terminal is connected to the third output, the device is transformed into a system for monitoring and controlling liquid level with its excited surface using the first and second outputs, which provides the mode for monitoring and maintaining the liquid level at a fixed height and the mode for filling and emptying the reservoir. When the first and second programming terminals are open and the third programming terminal is connected to the third output, the device is transformed into a system for monitoring and controlling liquid with its calm surface in the mode for monitoring and maintaining the liquid level at a fixed height and in the mode for filling and emptying the reservoir. The device provides vertical, horizontal and combined (vertical mounting of one and horizontal mounting of the other functional assembly) mounting methods.

EFFECT: increased functionalities of the device and wider range of controlled loads and mounting methods.

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The invention relates to the field of automation of production processes in mechanical engineering and is intended for automation of technological processes related to the control and regulation of liquid media.

Known monitoring device that contains the liquid level sensor, a generator of electrical oscillations, the indicator detector (see inventor's certificate SU 243872, IPC G01f, CL e, 34 ' Compensation optical sensor", 14.05.1969).

Such a device has limited functionality due to the lack of vozmozhnosti:

1) work in a mode of filling and emptying of the tank liquid, and to maintain its level at a fixed height, as this device allows only the control of the liquid level;

2) manage different types of loads, such as the winding of the electromagnetic relay and (or) two coil of the electromagnetic actuator pump units;

3) to produce horizontal or combined (vertical mounting single and horizontal mounting another sensor) mounting fluid-level sensor on the object of operation;

4) to produce programming functionality. In addition, such a device is complex sensor design liquid level.

It is also known in trojstvo control, containing the first and second fluid-level sensor, the first and second threshold elements, the sensitivity control (see product Catalog 2004 "Aries" "instrumentation and automation of industrial enterprises", a device to control a submersible pump ARIES SAU-M2, S. 110; website "Aries" www.owen.ru. "Product catalog 2007, version 7, the device for controlling a submersible pump ARIES SAU-M2", p.137). But such a device has limited functionality because:

1) does not allow to operate in the mode control and maintain the level of the controlled fluid at a given fixed height due to the fact that the design of this device allows it only in the mode of filling and emptying of the tank with liquid;

2) does not provide a combined horizontal and vertical mounting single and horizontal mounting another sensor) mounting fluid-level sensor on the object of their operation, because the design of this device provides only vertical mounting the sensors liquid level;

3) allows you to manage various types of loads, such as the winding of the electromagnetic relay and (or) two coil of the electromagnetic actuator pump units;

4) does not possess functional in what zmozhnostjami control and regulation of fluids with disturbed their surfaces.

The closest to the technical nature of the proposed solution is a control device that contains the multivibrator, the liquid level sensor, trigger, repeater, the inverter, the detector, the first and second threshold elements, the first and second regulators sensitivity, the first and second capacitors (see the journal "Radio", No. 6, 1991, p.32).

However, this device has limited functionality because:

1) its design provides the only mode of filling and emptying of the tank controlled by the liquid and prevents the operation of this device in a control mode and maintain the level of the controlled fluid at a given fixed height;

2) does not provide horizontal and combined methods of mounting the liquid level sensor, because the device provides only vertical way of their mounting on the object of operation;

3) does not allow the programming of its functionality;

4) allow the operation to only one type of load in the form of an electromagnetic relay and does not allow, for example, his work simultaneously on two coil of the electromagnetic actuator pump units;

5) does not have the functionality of the control fluid from disturbed their surfaces, nprimary mobile controlled facilities or production facilities, in accordance with the process is the mixing of the liquid.

The task being solved by the invention is the extension of the functionality of the device by providing a control liquid media with rough surface and regulate their level at a fixed height with the possibility of programming the functionality of the device and increase the range of controlled loads, and methods of installation.

The current task is achieved by the fact that in the device control and regulation of liquid level, containing the first multivibrator, the first liquid level sensor, the trigger, the first detector, the first and second threshold elements, the first and second repeaters, the first and second regulators sensitivity, the first and second capacitors according to the invention introduced a second liquid level sensor, the second detector, differentiator, an input connected to the direct output of the first threshold element, and its output is the first output programming the unit in its original state, the output of which is connected to the S-input of the trigger, the inverse and direct outputs which are respectively the first and second outputs of the device, the third capacitor, the first output of which is connected to the inverse output of the second threshold element, the one-shot, whose input is connected to second the th output of the third capacitor, and the point of connection of its input and the second output is the second output programming, the first and second keys voltage, the first conclusions which are connected respectively To the input and the J-input of the trigger, the second inputs with common ground device, the control inputs with the output of one-shot, the first and second display units, the inputs of which are connected respectively to the inverse and direct outputs trigger the second multivibrator, while the first and second fluid-level sensor is made conductive, each of which contains two conductive electrodes, one of which is a signal electrode, and the other General the electrode is made longer than the signal electrode and connected to a common "ground" of the device, and the outputs of the first and second multivibrators connected with the first conclusions of the respective capacitors, the latter findings are connected to the first conclusions of the relevant controls for gain, the second set of conclusions which are connected with inputs of the respective detectors, the inputs of which are connected to the signal electrodes of the respective sensors, liquid level, and direct the output of the second threshold element connected to the J input of a trigger, and outputs the first and second detectors connected to inputs of the respective threshold element, inverted outputs of which are connected to the input of the respectively first and second repeaters, the outputs are respectively the third and fourth outputs of the device, which is structurally designed in the form of two functional units, the first of which includes series-connected first multivibrator, condenser, control sensitivity, the detector, the threshold element, and the first repeater, the first liquid level sensor and a differentiator with relevant links, a second node, the rest of the circuit device, and the point of connection To the input trigger and the first output of the first key voltage is the third output programming, in connection with which the third output device and the circuit between the first and second findings of the programming device transforms in the system of control and regulation of liquid level with disturbing its surface using the first and second outputs of the device, when the open state of the first and second findings programming and closed between a third output programming and third output devices in the system of control and regulation of liquid level with a calm its surface using the first and second outputs of the device, and when the program pins in the set of switches control the upper and lower fluid levels, which ablauts the respectively first and second functional units of the device, using respectively the third and fourth outputs of the device.

Figure 1 shows the functional diagram of the sensor; figure 2 - vertical and horizontal mounting in the mode of filling and emptying of the tank; figure 3 - vertical and horizontal mounting of the device to maintain the liquid level at its fixed height with unlimited space mounting area; figure 4 - vertical and horizontal mounting of the device to maintain the liquid level at its fixed altitude with limited mounting space zone; figure 5 - diagram of stresses, explaining the operation of the device for the control and regulation of liquid level with disturbing its surface; figure 6 - diagram of voltages explaining the operation of the device at the control and regulation of liquid level with a calm its surface.

The device includes first and second sensors 1, 2 liquid level, the first and second multivibrators 3 and 4, the first and second capacitors 5, 6, the first conclusions which are connected respectively to the outputs of the first and second multivibrators 3 and 4, the first and second regulators 7, 8 the sensitivity of conclusions which are connected with the second pins, respectively, the first and second capacitors 5, 6, the first and second detectors 9, 10, inputs kotorykhbudut second conclusions, respectively, the first and second regulators 7, 8 sensitivity of the first and second threshold elements 11, 12, each of which is made, for example, by the circuit of Schmitt trigger whose inputs are connected to the outputs respectively of the first and second detectors 9, 10, the differentiator 13, the inlet of which is connected to the direct output of the threshold element 11, the terminal 14 connected to the output of the differentiator 13, and the first output programming, JK flip-flop 15, block 16 installation in the initial state of the circuit device, the output of which is connected to the S-input of the trigger 15, the first repeater 17, the inlet of which is connected to the inverse output the first threshold element 11, the first and second blocks 18, 19 display, the inputs of which are connected respectively with the inverse and the direct outputs of the RS flip-flop 15, the first and second output terminals 20 and 21 are connected respectively to the inverse and the direct outputs of the trigger 15, which are respectively the first and second outputs, the second repeater 22, whose input is connected to the inverse output of the second threshold element 12, the third and fourth terminals 23 and 24, are connected to the outputs respectively of the first and second repeaters 17 and 22 and are respectively the third and fourth outputs of the device, the first and the second key voltage 25, 26, the first conclusions which are connected respectively To the input and the J-input of the trigger 15, the latter findings - General the terminal to "ground" the device, the one-shot 27, the output of which is connected with the control keys 25, 26, the third capacitor 28, the first output of which is connected to the inverse output of the threshold element 12, the terminal 29 connected to the connection point between the input of one-shot 27 and the second output of the third capacitor 28 and the second output programming terminal 30 connected to the connection point To the input of the trigger 15 and the first output of the first key 25 and the third output programming. When this occurs, the direct output of the threshold element 12 is connected to the J input of the trigger 15. Using pins programming by programming the functionality of the device.

Each sensor 1, 2 liquid level is made, for example, conductive in the form of two conductive electrodes, one of which is a signal electrode 31 (32), and the other common electrode 33 (34). The signal electrodes 31 and 32 respectively of the first and second sensors 1, 2 levels are connected to the inputs respectively of the first and second detectors 9, 10. The common electrodes 33, 34 of both sensors 1, 2 are connected to a common ground circuit device. Structurally, the common electrodes 33, 34 of the sensors 1, 2 is made longer than the signal electrodes 31, 32 for identification and orientation of the device in various ways on-site installation operation. In addition, the ratio on the ins signal and common electrodes of the sensors provides all the modes and methods of mounting the device to the flushing or dewatering of the common electrode of the liquid level sensor is always the first or simultaneously with the signal the electrode. This, in turn, provides moments of the fluid level control and regulate the presence of the controlled fluid at a potential common ground device or outside contact her with the electrodes of the sensors 1, 2.

Signals for the excitation electrodes of the sensors 1, 2 are variable voltage, low frequency, supplied with the respective outputs of the multivibrators 3 and 4. This allows you to avoid polarization of the electrodes of the sensors 1, 2 and of the processes of electrolysis and, as a consequence, the loss of sensitivity due to the deposition of salts, and greatly extend their lifespan. Signal and common electrodes of the sensors 1, 2 are made of material resistant to the effects of controlled fluid, causing corrosion and destruction of the electrodes, for example of stainless steel or low carbon steel, chrome or Nickel coatings depending on the type of the controlled fluid.

The multivibrators 3, 4 is performed, for example, according to the scheme of the symmetric oscillator rectangular pulses on the basis of the operational amplifier (see Shyla V.L. Linear circuits in electronic equipment. - M.: Owls. Radio, 1974, s, ri, a).

Regulators 7, 8 sensitivity performed, for example, based on a resistor with a variable resistance value in the form of a variable resistor p is the scheme of the rheostat and provides a smooth adjust the sensitivity of the sensors 1, 2, or pick a resistor with a constant resistance value, providing a stepped adjustment of the sensitivity of the sensors 1, 2. The presence of the device controllers 7, 8 sensitivity allows it to be adapted to work with a wide range of conductivity controlled fluid: water, contaminated water, food, solvents, milk and milk beverages, weak acid and alkaline solutions, etc. through the initial setup of the resistance values of the controllers 7, 8.

The detectors 9, 10, made for example according to the scheme diode passive transducer peak values of the AC voltage to DC with sequential switching rectifier diode with the output load in the form of a parallel RC circuit (see Volgin LI transducers AC voltage to DC. M: Owls. radio, 1977, S. 174, RIS, b).

Unit 16 installed in the initial state of the circuit device is performed, for example, on the basis of the transistor n-p-n type and an RC circuit (see figure 1)consisting of series-connected capacitor and resistor, the connection point of the first conclusions of which is connected to the base of transistor block 16, and the second output resistor and the emitter of the transistor unit 16 is connected to the common ground circuit device. The second output capacitor connected to the power supply voltage is I, and the collector of the transistor, which is the output of unit 16, connected to the S-input of the trigger 15. The block 16 is designed for installation schematic of the device to its original state at the time of submission to his power.

The display units 18 and 19 is made, for example, based on (see figure 1) series-connected resistor, the first terminal connected to the inverse or direct outputs of the trigger 15, and the led, the cathode of which is connected to the common ground circuit device. Blocks 18 and 19 display are designed for visual inspection of the feed load (figure 1 not shown) of the control signals respectively with inverse and direct outputs of the trigger 15 and control a working state of the device.

Repeaters 17 and 22 are designed to align with output impedances, respectively, the threshold elements 11 and 12 and the resistance of the loads connected to their outputs through the output terminals 23 and 24 of the device.

The outputs of the trigger 15, repeaters, 17, 22 performed with levels of load capacity, providing switching control windings of electromagnetic actuators and low-power electromagnetic relay. In addition, the load can be the inputs of the logic elements of digital circuits.

The keys 25 and 26 are designed to generate pulses of negative polarity with a duration equal to the duration of the output pulse is Lisa the one-shot 16, respectively To the input and the J-input of the trigger 15 by closing these conclusions on the General ground of the device. The keys 25 and 26 made, for example, on the basis of the transistor n-p-n type. The first findings of the keys 25, 26 are the conclusions of the collectors of transistors, the second conclusions - the conclusions of their emitters, the control inputs of the keys 25, 26 are the conclusions of the bases of the transistors.

The one-shot 27 made, for example, according to the scheme standby multivibrator based trigger and timing RC circuit in the form of a series-connected resistor and capacitor, a resistor R which is connected to the power source and the connection point connected to the R input of the trigger input Ā1, which is the input of one-shot, served triggering pulses to the inputs Ā2 and thus serves voltage levels logic "1", and the direct trigger output is the output of one-shot 27 (see Shyla V.L. Popular digital circuits: the manual. - M.: Radio and communication, 1987. - 352 S.: ill. - (Mass reliability. Vol. 1111), s, Fig. 1.136 a, b). The one-shot 27 is designed to generate pulses of voltage levels logic "1" for switching keys 25, 26, applied to their control inputs, negative differential voltages on the direct and inverse outputs of threshold elements 11 and 12 respectively. The duration of the pulse generated by one-shot 27 is determined deletelines the ü delay switching of the trigger 15 in the moments of occurrence of the above differential voltage, appearing in moments of flushing of the signal electrode 31 of the sensor 1 of the controlled fluid and draining the signal electrode 32 of the sensor 2 in the process of control and regulation of liquid level when disturbed its surface. Excited state level of the controlled fluid is mobile and stationary technological production facilities operation. When disturbed the controlled fluid, for example, can produce its single or repeated splashes, spray or wave with a constant frequency of occurrence, which can be briefly wash the electrodes of the sensors 1, 2, when the level of the controlled fluid is near the electrodes on the verge of their washing or drying respectively below or above the electrodes of the sensors 1 and 2. Such occasional rinsing or drying of the electrodes cause false momentary actuation of the sensors 1, 2 and the appearance of random switching threshold of the elements 11 and 12, causing a false trigger 15 and their appearance on its outputs and the output terminals 20, 21 of the device. To eliminate the occurrence of false positives at the output terminals 20 and 21 in the device introduced delay, the duration of which is determined by the duration of the output pulse of one-shot 27, the switch trigger in the moments of occurrence of false crobat is of threshold elements 11, 12. The duration of this delay is chosen such that it was greater than the duration of the washing or drying of the electrodes of the sensors 1, 2 surges or wave of the controlled fluid. In the case of permanent spray duration of such delay is chosen with regard to the rate of descent or ascent of the controlled liquid level. While the length of the delay is determined by the beginning of the false washing or drying of electrodes and the guarantee of the controlled liquid level below or above the signal electrode of the sensor 1 or 2 after the beginning of his false positives.

The differentiator 13 is designed to generate pulses of negative polarity negative differential output voltages of the first and second threshold elements 11, 12 to start the one-shot 27. The differentiator 13 made, for example, on the basis of a differentiating RC circuit consisting of series-connected capacitor, a first output which is the input of the differentiator 13 and resistor in parallel, which included a diode, the anode of which is connected to the connection point of the first output resistor and a second output capacitor, which is the output of the differentiator. Thus the cathode of the diode and the second terminal of the resistor RC circuit connected to the power supply voltage (see figure 1).

Structurally, the device will is prevalent in the form of two functional units 35 and 36 (see 1). The first node 35 includes a series-connected flip-flop 3, the capacitor 5, the controller 7 sensitivity, the detector 9, the threshold element 11 and the sensor 1 liquid level, the repeater 17, the output terminal 23 and the differentiator 13 with the appropriate electrical connections. The second node 36 includes the rest of the device map not included in the first functional node 35. When this terminal 14 connected to the output of the differentiator 13, terminal 29 connected to the connection point between the input of one-shot and the second output of the third capacitor 28 and terminal 30 is connected to the connection point To the input of the trigger 15 and the first output key 25 are respectively first, second and third pins of the programming used to program the functionality of the device. When the terminal 14, which is part of the node 35, and the terminal 29, which is part of the node 36, shorted to each other, and the terminal 30, which is part of the node 36 connected to the terminal 23, which is the third output of the device and part of the node 35, the device is transformed into the system of control and regulation of liquid level with disturbing its surface using its first and second outputs, which are respectively output terminals 20 and 21 belonging to the functional node 36. When to this is tensator 28, connected to the output of the differentiator 13, formed with a resistor and diode differentiator 13 differentiating circuit, forming a negative differential output voltage U5 threshold element 12 at the output of the differentiator 13 pulse voltage U8 level logic "0" to start the one-shot 27. In case of disconnection of the terminals 14 and 29 and the connection terminal 30 to terminal 23, the device is transformed into the system of control and regulation of liquid level with a calm its surface using its first and second outputs, which are respectively output terminals 20 and 21. When the terminal 14 and the terminal 29 are opened and the terminal 30 is disconnected from the terminals 23 of the device is transformed into a set of switches control the liquid level, which consists of two detectors, one of which is signaling the upper liquid level in the form of a functional node 35 of the device, the second indicator, the lower the level of liquid in the form of a functional node 36 of the device. In this case, is only the third and fourth outputs, which are output terminals 23 and 24, respectively, belonging respectively to the first and second nodes 35 and 36 of the device. Moreover, the programming functionality of the device is performed by a simple method without changing its design by deputies the project or disconnection of terminals 14 and 29 and the connecting terminal 30 to terminal 23 or disable it from the terminal 23 when the wiring at the facility operation. Figure 1 is a diagram of the device depicted in this state, in which the features match the features of level switches on the upper level (site 35) and lower level (site 36), when the program pins 14, 29, 30 are in a disabled state.

For a better understanding of the structure of the device and features of its design and use at the facility operation, providing increased functionality of the device, below are some explanations.

Above it was noted that structurally, the proposed device consists of two functional units 35 and 36. Each of them performed, for example, in the cylindrical housing. On one end of the body, which is the working end of the corresponding function node set signal and common electrodes conductive liquid level sensor 1 or 2. At the other end of the housing is sealed to the first end of the connecting cable of a certain length, at the other end of which was the installation of a cable connector, for example, with pin contacts. Installation of the connector device consisting of two functional units 35, 36, using two return connectors (figure 2, 3, 4 not shown) with contact type socket mounted on the object usage is. Using these connectors is the articulation of functional units 35, 36 of the device. On their rear sides of mounting the electrical circuits of the voltage supply, installation wires to connect to the outputs of the device loads and terminals 14, 29, 30 programming.

In the case of the connection terminals 14, 29 between itself and the connecting terminal 30 to terminal 23, for example, by the method of soldering the response parts of the connector device, it functions as a system of control and regulation of liquid level uneasy with its surface in two different modes: level control, filling and emptying of liquid or mode control of liquid level and maintain it at a fixed height. Using terminals 20 and 21, the first and second output devices, and terminals 23 and 24 as the third and fourth outputs to control loads are not involved and used as a control conclusions testing of conductive sensors 1, 2 liquid level functional units 35 and 36, or for reproduction of signals from the outputs of the repeaters 17 and 22 for the needs of other consumers of these signals at the facility operation. However, the output terminal 23, which is the third output of the device is simultaneously used together with the terminal 30, which is the third output programming for prog is armirovanie the functionality of the device.

At open terminals 14, 29 and connected to the terminal 30 to the terminal device 23 functions as a system of control and regulation of liquid level with a calm its surface in two different modes: level control, filling and emptying of liquid or mode control of liquid level and maintain it at a fixed height. This uses the first and second output devices, and output terminals 23 and 24 as the third and fourth outputs of the device to control the loads are not involved and used as a control conclusions testing of conductive sensors 1, 2 liquid level functional units 35 and 36, or for reproduction of signals from the outputs of the repeaters 17 and 22 for the needs of other consumers of these signals at the facility operation.

When you need to manage industrial pumping units through electromagnetic starter with two control windings on it off and on, are utilized at the same time, respectively, the first and second outputs of the device. In the case of control of a pumping unit using electromagnetic relays with one control winding, is used to control only the second output device, which enables or disables the electromagnetic relay.

At open terminals 14 and 29 and disabled terminal 30 from KL the guide 23, the device is transformed into a set of independent functional units 35 and 36 with the functionality of the switches, respectively, the upper and lower liquid levels. If necessary to control the level of liquid media can be used simultaneously both alarm upper and lower levels, or one of them. This may be only the third or fourth output devices, which are respectively output terminals 23 and 24, and first and second outputs, which are output terminals 20 and 21 are not in effect.

Consider the operation of the device in five different modes: filling and emptying of the tank with a disturbed surface of the liquid, the filling and emptying of the tank with a calm surface of the liquid, maintaining liquid level on its fixed height from the disturbed surface of the liquid, maintaining liquid level on its fixed height with a calm surface of the liquid and the fluid level indicators.

1. The operation of the device in the mode of filling and emptying of the tank with a disturbed surface liquid

Operation in this mode is vertical or horizontal mounting of the device in open and closed tanks (see figure 2) with walls made of conductive or dielectric material. Thus the nodes 35 and 36 are mounted on the object of operation in vertical or in horizontal position. Moreover, the node 35 mouth is vlivaetsa top and the node 36 at the bottom of the tank 37. Terminals 14 and 29 thus shorted to each other, and the terminal 30 is connected to the terminal 23. In this case you use the first and second outputs of the device, and its third and fourth outputs for load management is not involved.

When applying at time t0on the device with a power supply unit 16 is the charge of the capacitor through the transition emitter-base of transistor n-p-n type (see Fig 1). When this transistor unit 16 is opened and through its transition collector-emitter served on the S-input of the trigger 15, the pulse voltage U1 with logical level "0" (see figure 5). As a result, the outputs of the trigger 15 and respectively on the first and second output terminals 20 and 21 are set voltage U10 and U11 levels logic "0" and logic "1" respectively. After the end of charge of the capacitor unit 16 of its transistor is closed and further on the operation of the circuit device has no effect, since the output of block 16 and the S-input of the trigger 15 is set to the voltage U1 with logical level "1". Through resistor differentiator 13 at its output and the input of one-shot 27 sets the voltage U8 with logical level "1". At the same time at the output of the one-shot 27 sets the voltage U9 level logic "0". However, the multivibrators 3 and 4 go into the mode of generation of electric number of the oscillations, as in the initial state in the reservoir 37 is controlled fluid 38 is absent, and the electrodes of the sensors 1, 2 are in the drained condition. Output pulse voltage multivibrators 3 and 4 are fed through capacitors 5 and 6, the sliders 7 and 8 to the inputs of the detectors 9 and 10, respectively. The amplitude value of the pulse voltage from the outputs of the multivibrators 3 and 4 are converted respectively by the detectors 9 and 10 in the constant voltage levels logic "1" and their outputs are fed to the inputs of threshold elements 11 and 12 respectively. Under the action of these stresses is the last switch in such a steady state in which their direct and inverse outputs are set to the voltage U3, U6 and U2, U5, respectively, with levels logic "1" and logical "0". As a result, the outputs of the repeaters 17 and 22 are respectively voltage U4 and U7 with logical levels "0"and the input of the differentiator 13 - voltage U3 with logical level "1". Along with this, to the J input and the K input of the trigger 15 with the direct output of the threshold element 12 and the output of the repeater 17 sets the voltage U6 and U4, respectively, with levels logic "1" and logical "0". This combination of logic signals to the J input and the K input of the trigger 15 confirms its original state, in which its forward and inverse inputs installed tense is I U10 and U11 levels logic "0" and logic "1" respectively. Then the led unit 18 display is blank and the led unit 19 of the display flashes. With direct access to the trigger 15 through the output terminal 21 is energized U11 with logical level "1" to the control winding of the inclusion (figure 1 it is not shown) of the electromagnetic contactor of the pump installation. Then begins filling the tank 37 fluid 38 and controlled by the liquid level in the tank 37 begins to climb up.

At time t1is flushing fluid 38 of the sensor electrode 2. As a result, after the electrodes 2 and controlled fluid 38 to the input of the detector 10 is connected to the common ground circuit device. Then at the output of detector 10 is set to the voltage level of the logical "0", under which the threshold element 12 is switched in such a steady state, in which its forward and inverse outputs are respectively the voltage U6 and U5 with logical levels "0" and logical "1". But at the time of the positive voltage U5 supplied to the first output capacitor 28, the output of the differentiator 13 of the forming voltage pulse U8 level logic "0" occurs because the differentiator 13 generates the pulse only when the input negative differential voltage U5 output then the new element 12. So start the one-shot 27, forming at its output pulse voltage U9 with logical level "1" and the circuit of the keys 25, 26 does not occur. At the J input and the K input of the trigger 15 with the direct output of the threshold element 12 and the output of the repeater 17 are respectively voltage U6 and U4 levels logic "0"when the trigger 15 continues to maintain its previous state. As a result, in the moment of time t1the process of filling the tank 37 fluid 38.

At time t2the electrodes 1 are washed with liquid 38. As a result, after its electrodes and controlled fluid input of the detector 9 is connected to the common ground circuit device. Then at the output of the detector 9 is set to the voltage level of the logical "0", under which the threshold element 11 is switched in such a steady state, in which its inverted output is set to the voltage U2 with logical level "1"which is input to the repeater 17. In the moment of the negative differential output voltage U3 of the threshold element 11 (see figure 5) at the output of the differentiator 13 is formed of a pulse voltage U8 level logic "0". Under the action of the one-shot pulse 27 is started and its output is generated pulse voltage U9 with logical level "1, served on the control inputs of the keys 25, 26. In the last closed at the time of the positive pulse voltage U9 output of one-shot 27. During the closed state of the key 25, the voltage U4 with logical level "1" To the input of the trigger 15 will not pass to the J-input To input continue to be, respectively, the voltage U6 and U4 levels logic "0". As a result, the trigger 15 continues to maintain the previous state for the closed state of the keys 25, 26. The decay of the pulse voltage U9 the one-shot 27 keys 25, 26 are opened, and from the output of the follower 17 To the input of the trigger 15 is energized U4 with logical level "1". As to the J input and the K input of the trigger 15 is set accordingly the voltage U6 and U4 with logical levels "0" and logical "1", it switches to this state when its inverse and direct outputs are respectively the voltage U10 and U11 levels logic "1" and logical "0". Then the led indicator 19 will go off and the led indicator 18 is exposed. At this point, with the inverted output of the trigger 15 through the output terminal 20 is energized U10 with logical level "1" to the control winding (figure 1 it is not shown) off of the electromagnetic contactor of the pump installation. In the pump unit is switched off, the filling of the tank 37 at time t 2ceases. Then the scheme of arrangement and position of the level of the controlled fluid 38 can be in this state until, until the start of its consumption.

After a time t2for example, begins the flow of the controlled fluid 38. After a certain period of time at time t3is the drainage of the signal electrode 31 of the sensor 1. When this occurs, the disable input of the detector 9 from the common ground of the device and from the output of the multivibrator 3 is fed to the input of the detector 9 pulse voltage, under which the output of the detector 9 and the input of the threshold element 11 is set to the voltage level of the logical "1". The threshold element 11 is switched to another state in which to its inverse and direct outputs are respectively the voltages U2 and U3 with the logical levels "0" and logical "1". But under the action of a positive differential voltage U3 supplied with the direct output of the threshold element 11 to the input of the differentiator 13, forming at its output pulse voltage U8 level logic "0" occurs because the differentiator 13 generates the pulse only negative differential input voltage U3. So start the one-shot 27 and shift keys 25, 26 does not occur. At the output of repeater 17 sets the voltage U4 when the logical level "0", served on the K-input of the trigger 15. As to the J input and the K input of the trigger 15 is set accordingly the voltage U6 and U4 with logical levels "0", it retains its previous state when its inverse and direct the output voltage is set accordingly U10 and U11 levels logic "1" and logical "0". In the pump unit continues to be in a disabled state, so at time t3the flow of liquid 38 continues and the level continues to drop in the tank 37 down.

After a certain period of time at time t4is the drainage of the signal electrode 32 of the sensor 2. The result is a disabling input of the detector 10 from the common ground circuit device and to the input of the detector 10 is fed from the output of the multivibrator 4 pulse voltage, which at its output and at the input of the threshold element 12 is set to the voltage level of the logical "1". The threshold element 12 is switched to the other stable state, in which its forward and inverse outputs are set to the voltage U6 and U5 with the logical levels "1" and logical "0", submitted respectively to the J-input of the trigger 15 and the input of the differentiator 13. Negative differential output voltage U5 threshold element 12 at the output of the differentiator 13 is formed impulse is atragene U8 level logic "0". Under the action of this pulse starts the one-shot 27 and forming at its output pulse voltage U9 with logical level "1"which is fed to control inputs of the keys 25, 26. In the last closed at the time of the positive pulse voltage U9 output the one-shot. During the closed state of the key 25, the voltage U6 with logical level "1" to the J-input of the trigger 15 will not pass to the J-input To input set voltage levels logic "0". As a result, the trigger 15 stores the previous state for the closed state of the keys 25, 26. The decay of the pulse voltage U9 the one-shot 27 keys 25, 26 are opened and the direct output of the threshold element 12 to the J-input of the trigger 15 is energized U6 with logical level "1". As to the J input and the K input of the trigger 15 is set accordingly the voltage U6 and U4 with the logical levels "1" and logical "0", it switches to this state when its inverse and direct outputs are respectively the voltage U10 and U11 levels logic "0" and logical "1". Then the led indicator 18 is extinguished, and the led indicator 19 is exposed. At this moment, the output of the trigger 15 through the output terminal 21 is energized U11 with logical level "1" to the control winding (figure 1 it is not shown) included what I electromagnetic actuator pump unit. In the pump unit turns on and starts filling the tank 37 fluid 38.

On this first cycle control and regulation of liquid level begins and ends with the second cycle of operation of the device according to the algorithm described above in the first cycle of operation of the device. The second cycle of operation of the device shown in figure 5, starting from the date of expiry of the pulse voltage U9, located in the time interval t4-t5and until the end of the pulse voltage U9 following the time t8(see figure 5).

2. The operation of the device in the mode of maintaining the liquid level at its fixed height with wavy liquid surface

This mode can be used vertical or horizontal mounting of the device in open and closed tanks (see figure 3, 4)whose walls can be made of conductive or dielectric material. Thus the nodes 35 and 36 are mounted on the object of operation in vertical or in horizontal position. Moreover, the electrodes 31, 33 sensor 1 node 35 are mounted above, and the electrodes 32, 34 of the sensor 2 node 36 is controlled below the liquid level for horizontal mounting. Vertical mounting end of the signal electrode 31 of the sensor 1 node 35 is mounted above, and the end signal e is of ectrode 32 sensor 2 node 36 - below the controlled level. Terminals 14 and 29 thus shorted to each other, and the terminal 30 is connected to the terminal 23. In this case you use the first and second outputs of the device, and its third and fourth outputs for load management is not involved.

The device can be used in this mode in terms of the unlimited space of the mounting area (see figure 3), when the object of the operation are the tanks of large dimensions and mounting of the nodes 35 and 36 of the device is performed on the opposite walls of the tank in case of horizontal mounting device or near the opposite walls of the tank in a vertical way its installation.

If the instrument is in this mode when space is limited mounting area (see figure 4), when exploited can be reservoirs for both large and small dimensions, the installation of the nodes 35 and 36 on one wall of the tank 37 close to each other in horizontal or vertical way.

Operation in this mode is identical to the mode of filling and emptying of the tank and is described by the diagrams shown in figure 5. The difference between this mode from the above is that in this case we use a more narrow range level control of the controlled fluid, which is provided by valisineria in the vertical plane of the axes of symmetry of the signal electrodes of the sensors 1 and 2 respectively of the nodes 35 and 36 in a horizontal way their mounting ends of the signal electrodes of the sensors 1 and 2 nodes 35 and 36 in the vertical the method of their installation (see figure 3, 4).

Moreover, the magnitude of this bias is many times less than the fixed level of the controlled fluid taken for its nominal value, i.e. the nominal value of the height of the controlled liquid level, which is keeping it with a given accuracy. In turn, the value of the specified offset is determined by the accuracy of the level of the controlled fluid 38. The smaller the offset, the more accuracy is maintaining a liquid level on its fixed height.

If the value specified offset is equal to ΔL, the accuracy of controlling the liquid level on its fixed height will be ±ΔL/2 when setting the nominal value of the liquid level on its fixed height L in the middle of the displacement ΔL. For example, if the nominal specified height level of the controlled fluid L=2 m and the displacement ΔL=10 cm accuracy regulation (maintaining) the liquid level at this altitude is 5%. Selecting this mode, the value of the specified offset, you can set the desired value of the control accuracy of the liquid level at the fixed height.

3. The operation of the device in the mode of filling and emptying of the tank with a calm liquid surface

Operation in this mode is vertical the AUX or horizontal mounting method of the device in open and closed tanks (see 2) with walls made of conductive or dielectric material. Thus the nodes 35 and 36 are mounted on the object of operation in vertical or in horizontal position. In this mode, the terminals 14 and 29 are opened and the terminal 30 is connected to the terminal 23. Thus the output of the differentiator 13 is disconnected from the input of one-shot 27 and the second output of the third capacitor 28, and the operation of the device in this mode, the differentiator 13, the condenser 28, the one-shot 27, keys 25, 26 have no effect. And in this case you use the first and second outputs of the device, and its third and fourth outputs for load management is not involved.

When applying at time t0on the device with a power supply unit 16 is the charge of the capacitor through the transition emitter-base of transistor n-p-n type (see Fig 1). When this transistor unit 16 is opened and through its transition collector-emitter served on the S-input of the trigger 15, the pulse voltage U1 with logical level "0" (see Fig.6). As a result, the outputs of the trigger 15 and respectively on the first and second output terminals 20 and 21 are set voltage U10 and U11 levels logic "0" and logic "1" respectively. After the end of charge of the capacitor unit 16 of its transistor is closed and further on the operation of the circuit device is not affected, since o is de block 16 and the S-input of the trigger 15 is set to the voltage U1 with logical level "1". Through resistor differentiator 13 at its output sets the voltage U8 with logical level "1". At the same time at the output of the one-shot 27 sets the voltage U9 level logic "0". However, the multivibrators 3 and 4 go into the mode of generation of electrical oscillations, as in the initial state in the reservoir 37 is controlled fluid 38 is absent, and the electrodes of the sensors 1, 2 are in the drained condition. Output pulse voltage multivibrators 3 and 4 are fed through capacitors 5 and 6, the sliders 7 and 8 to the inputs of the detectors 9 and 10, respectively. The amplitude value of the pulse voltage from the outputs of the multivibrators 3 and 4 are converted respectively by the detectors 9 and 10 in the constant voltage levels logic "1" and their outputs are fed to the inputs respectively of threshold elements 11 and 12. Under the action of these stresses is the last switch in such a steady state in which their direct and inverse outputs are set to the voltage U3, U6 and U2, U5, respectively, with levels logic "1" and logical "0". As a result, the outputs of the repeaters 17 and 22 are respectively voltage U4 and U7 with logical levels "0"and the input of the differentiator 13 - voltage U3 with logical level "1". Along with this, to the J input and the K input of the trigger 15 with direct access threshold ale the NTA 12 and the output of the repeater 17 sets the voltage U6 and U4, respectively, with levels logic "1" and logical "0". This combination of logic signals to the J input and the K input of the trigger 15 confirms its original state, in which its forward and inverse input set voltage U10 and U11 levels logic "0" and logic "1" respectively. Then the led unit 18 display is blank and the led unit 19 of the display flashes. With direct access to the trigger 15 through the output terminal 21 is energized U11 with logical level "1" to the control winding of the inclusion (figure 1 it is not shown) of the electromagnetic contactor of the pump installation. Then begins filling the tank 37 fluid 38 and controlled by the liquid level in the tank 37 begins to climb up.

After a certain period of time at time t1is flushing fluid 38 of the sensor electrode 2. As a result, after the electrodes 2 and controlled fluid 38 to the input of the detector 10 is connected to the common ground circuit device. Then at the output of detector 10 is set to the voltage level of the logical "0", under which the threshold element 12 is switched in such a steady state, in which the direct current output is the voltage U6 with logical level "0"which is supplied to the J-input of the trigger 15, and the inverted output and the input and output of the repeater 22, respectively strain the U5 and U7 with levels logic "1". At the J input and the K input of the trigger 15 with the direct output of the threshold element 12 and the output of the repeater 17 are set voltage, respectively U6 and U4 levels logic "0"when the trigger 15 continues to maintain its previous state. As a result, in the moment of time t1the process of filling the tank 37 fluid 38.

At time t2the electrodes 1 are washed with liquid 38. In the through electrodes 31, 33 and controlled fluid 38 to the input of the detector 9 is connected to the common ground circuit device. Then at the output of the detector 9 is set to the voltage level of the logical "0", under which the threshold element 11 is switched in such a steady state, in which its inverted output is set to the voltage U2 with logical level "1"which is input to the repeater 17, and to direct the output - voltage U3 with logical level "0", which is input to the differentiator 13. This negative differential voltage U3 at the output of the differentiator 13 is formed of a pulse voltage U8 level logic "0", but the input of the one-shot 27 this pulse does not pass, because the terminals 14 and 29 are in open condition. So start the one-shot 27 is not happening and its output continues to be the voltage U9 with owner logical "0". However, at the output of the follower 17 and the input of the trigger 15 is set to the voltage U4 with logical level "1". As to the J input and the K input of the trigger 15 is set accordingly the voltage U6 and U4 with logical levels "0" and logical "1", it switches to this state when its inverse and direct outputs are respectively the voltage U10 and U11 levels logic "1" and logical "0". Then the led indicator 19 will go off and the led indicator 18 is exposed. At this point, with the inverted output of the trigger 15 through the output terminal 20 is energized U10 with logical level "1" to the control winding (figure 1 it is not shown) off of the electromagnetic contactor of the pump installation. In the pump unit is switched off, and the reservoir 37 fluid 38 at time t2ceases. Then the scheme of arrangement and position of the level of the controlled fluid 38 can be in this state until, until the start of its consumption.

After a time t2for example, begins the flow of the controlled fluid 38. After a certain period of time at time t3is the drainage of the signal electrode 31 of the sensor 1. When this occurs, the disable input of the detector 9 from the common ground of the device and from the output of the multivibrator 3 is fed to input the threshold element 11 of the pulse voltage, under the influence of which on the output of the detector 9 and the input of the threshold element 11 is set to the voltage level of the logical "1". The threshold element 11 is switched to another state in which to its inverted output and at the input of the follower 17 is set to the voltage U2 with logical level "0". As a result, the output of the follower 17 and the input of the trigger 15 is set to the voltage U4 with logical level "0". As to the J input and the K input of the trigger 15 is set accordingly the voltage U6 and U4 with logical levels "0", it continues to keep the previous state in which its inverse and direct the output voltage is set accordingly U10 and U11 levels logic "1" and logical "0". As a result, the fluid flow 38 continues and the level continues to drop in the tank 37 down.

After a certain period of time at time t4is the drainage of the signal electrode 32 of the sensor 2. The result is a disabling input of the detector 10 from the common ground circuit device and to the input of the detector 10 is fed from the output of the multivibrator 4 pulse voltage, which at its output and at the input of the threshold element 12 is set to the voltage level of the logical "1". Then the threshold element 12 is switched to the other stable state, in which its direct and versnum outputs are respectively the voltage U6 and U5 with the logical levels "1" and logical "0", submitted respectively to the J-input of the trigger 15 and the first output capacitor 28, the input of the repeater 22, the output of which sets the voltage U7 with logical level "0". Negative differential output voltage U5 threshold element 12 forming voltage pulse U8 differentiator 13 and, therefore, run the one-shot 27 not occur, as the terminals 14 and 29 are in open condition. Therefore, forming the output of one-shot 27 of the pulse voltage U9 with logical level "1" is not happening and its output continues to be the voltage U9 level logic "0". As at the J input and the K input of the trigger 15 is set accordingly the voltage U6 and U4 with the logical levels "1" and logical "0", it switches to this state when its inverse and direct outputs are respectively the voltage U10 and U11 levels logic "0" and logical "1". Then the led indicator 18 is extinguished, and the led indicator 19 is exposed. At this moment, the output of the trigger 15 through the output terminal 21 is energized U11 with logical level "1" to the control winding (figure 1 it is not shown) the solenoid actuator of the pump installation. In the pump unit turns on and starts filling the tank 37 fluid 38.

is this the first cycle control and regulation of liquid level begins and ends with the second cycle of operation of the device according to the algorithm, described above in the first cycle of operation of the device. The second cycle of operation of the device shown in Fig.6, starting from time t4and before time t8.

4. The operation of the device in the mode of maintaining the liquid level at its fixed height with a calm liquid surface

This mode can be used vertical or horizontal mounting of the device in open and closed tanks (see figure 3, 4)whose walls can be made of conductive or dielectric material. Thus the nodes 35 and 36 are mounted on the object of operation in vertical or in horizontal position. Moreover, in case of horizontal mounting electrodes 31, 33 sensor 1 node 35 are mounted above, and the electrodes 32, 34 of the sensor 2 node 36 is controlled below the liquid level 38. Vertical mounting end of the signal electrode 31 of the sensor 1 node 35 is set higher and the end of the signal electrode 32 of the sensor 2 node 36 is controlled below the liquid level 38. In this mode, the terminals 14 and 29 are opened and the terminal 30 is connected to the terminal 23. Thus the output of the differentiator 13 is disconnected from the input of one-shot 27 and the second output of the third capacitor 28 and the operation of the device in this mode, the differentiator 13, the condenser 28, the one-shot 27, keys 25, 26 have no effect. Moreover, CL is the tea used in the first and second outputs of the device, and his third and fourth outputs for load management is not involved.

The device can be used in this mode in terms of the unlimited space of the mounting area (see figure 3), when the object of the operation are the tanks of large dimensions and mounting of the nodes 35 and 36 of the device is performed on the opposite walls of the tank 37 for horizontal mounting device or near opposite walls at vertical method of its installation.

If the instrument is in this mode when space is limited mounting area (see figure 4), when exploited can be reservoirs for both large and small dimensions, the installation of the nodes 35 and 36 on one wall of the tank close to each other in horizontal or vertical way.

Operation in this mode is identical to the mode of filling and emptying of the tank and is described by the diagrams shown in Fig.6. The difference between this mode from the above is that in this case we use a more narrow range level control of the controlled fluid, which is provided by the offset in the vertical plane of the axes of symmetry of the signal electrodes of the sensors 1 and 2 respectively of the nodes 35 and 36 in a horizontal way their mounting ends of the signal is of lektroluv sensors 1 and 2 nodes 35 and 36 in a vertical way of their installation (see 3, 4).

Moreover, the magnitude of this bias is many times less than the fixed level of the controlled fluid 38, which is accepted for its nominal value, i.e. the nominal value of the height of the controlled liquid level, which is keeping it with a given accuracy. In turn, the value of the specified offset is determined by the accuracy of the level of the controlled fluid 38. The smaller the offset, the more accuracy is maintaining the liquid level 38 on its fixed height.

If the value specified offset is equal to ΔL, the accuracy of controlling the liquid level on its fixed height will be ±ΔL/2 when setting the nominal value of the liquid level on its fixed height L in the middle of the displacement ΔL. For example, if the nominal specified height level of the controlled fluid L=2 m and the displacement ΔL=5 cm accuracy regulation (maintaining) the liquid level at this height is 2.5%. Selecting this mode, the value of the specified offset, you can set the desired value of the control accuracy of the liquid level at the fixed height.

5. The operation of the device in the mode of fluid level indicators

In this mode, the terminals 14, 29 are in the open state, and the terminal 30 is disconnected from the terminals 23, the. all pins of the programming is in a disabled state. Thus the output of the differentiator 13 is disconnected from the input of one-shot and from the second output of the third capacitor 28, and the operation of the device in this mode, the differentiator 13, the condenser 28, the one-shot 27, keys 25, 26, the trigger 15 have no effect. And in this case you use the third and fourth outputs of the device, and its first and second outputs are not involved.

The nodes 35 and 36 of the device function as signaling the upper and lower fluid levels, respectively. In this case, they allow for vertical and horizontal mounting on the object of operation.

The host device 35 with the functionality of a level switch top level of the liquid is described by the diagrams U2 and U4 shown in Fig.6. The node 36 of the device with the functionality of the lower level switch liquid level is described by the diagrams U5 and U7, is shown in Fig.6.

In all the above modes of operation of the device in case of unlimited space of the mounting area of the device also provides a combined method of mounting on the object operation, when the installation site 35 (36) is the vertical method, and installation of site 36 (35) - horizontal method.

Thus, the proposed device compared the structure of analogs has several advantages: the system of control and regulation of liquid level in the form of two compact detectors upper and lower liquid levels, horizontal and combined methods of installation, the ability to control and maintain the liquid level at a given fixed height and with precision regulation, control of liquid level with a calm and excited its surfaces, a simple way of programming functionality, extended range of managed loads applied on the exploitation of the limited space of the mounting area.

In addition, the execution circuit device using the semiconductor and (or) hybrid technology chipset allows to significantly reduce its overall dimensions, material usage and improve performance.

This functionality provides in comparison with analogues flexibility of the device in operation with minimum cost indices.

Device control and regulation of liquid level, containing the first multivibrator, the first liquid level sensor, the trigger, the first detector, the first and second threshold elements, the first and second repeaters, the first and second regulators sensitivity, the first and second capacitors, characterized in that it introduced a second liquid level sensor, the second detector, differentiator, WMO is connected to the direct output of the first threshold element, and its output is the first output programming the unit in its original state, the output of which is connected to the S-input of the trigger, the inverse and the direct outputs of which are respectively the first and second outputs of the device, the third capacitor, the first output of which is connected to the inverse output of the second threshold element, the one-shot, whose input is connected to the second output of the third capacitor, and the point of connection of its input and the second output of the third capacitor is the second output programming, the first and second keys voltage, the first conclusions which are connected respectively To the input and the J-input of the trigger, the second inputs - with the common ground of the device, the control inputs with the output of one-shot, the first and second display units, the inputs of which are connected respectively to the inverse and direct outputs trigger the second multivibrator, while the first and second fluid-level sensor is made conductive, each of which contains two conductive electrodes, one of which is a signal electrode, and the other common electrode is made longer than the signal electrode and connected to a common "ground" of the device, and the outputs of the first and second multivibrators connected with the first conclusions of the respective capacitors, the latter findings are connected to first turn the ladies appropriate controls for gain, second, the conclusions of which are connected with inputs of the respective detectors, the inputs of which are connected to the signal electrodes of the respective sensors, liquid level, and direct the output of the second threshold element connected to the J input of a trigger, and outputs the first and second detectors connected to inputs of the respective threshold element, inverted outputs of which are connected to the inputs respectively of the first and second repeaters, the outputs of which are respectively the third and fourth outputs of the device, which is structurally designed in the form of two functional units, the first of which includes series-connected first multivibrator, condenser, control sensitivity, the detector, the threshold element, and the first repeater, the first liquid level sensor and a differentiator with relevant links, a second node, the rest of the circuit device, and the point of connection To the input trigger and the first output of the first key voltage is the third output programming, in connection with which the third output device and the circuit between the first and second findings of the programming device is transformed into the system of control and regulation of liquid level with disturbing its surface using the first and the second output device is a, when the open state of the first and second findings programming and closed between a third output programming and third output devices in the system of control and regulation of liquid level with a calm its surface using the first and second outputs of the device, and when the program pins in the set of switches control the upper and lower fluid levels, which are respectively the first and second functional units of the device, using respectively the third and fourth outputs of the device.



 

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5 dwg

FIELD: machine building.

SUBSTANCE: invention relates to field of computer-aided manufacturing in machine building and is provided for workflow automation, related to control and regulation of liquid mediums. Device is structurally implemented in the form of one functional assembly, including conductometric sensor of liquid level, connected to sensitivity control, detectors, connected to second lead sensitivity control, threshold elements, connected to detectors, differentiator, unit for placement into initial state, JK- trigger, monostable circuit, replicator and indicator units. Additionally device contains three programming leads of its functional capabilities and four outlets. At closed first and second programming leads and connection of the third programming lead to third device outlet it is transformed into control and regulation system of liquid level with its agitated surface and usage of the first and the second outlets of device, providing verification and liquid level control mode at fixed height. At opened first and second programming leads and connected to each other third programming lead and third outlet of the device it is transformed into monitoring and regulation system of liquid with its smooth surface in the mode of monitoring and keeping of liquid level at its fixed height. At disconnected programming leads device is transformed into warning assembly of monitoring of top level of liquid with usage of the third outlet of device or warning assembly of monitoring of bottom level of liquid with usage of fourth outlet of device. Device provides vertical and horizontal methods of erection.

EFFECT: expansion of functional capabilities of the device and increasing of nomenclature of controllable loads and methods of its erection and also improvement of operational performance.

5 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to automation of manufacturing processes in machine building and is meant for automating technological processes related to monitoring and controlling liquid media. The device is made in form of two functional assemblies and has three terminals for programming its functionalities and four outputs. The device has two level sensors, two multivibrators, capacitors, two detectors, two sensitivity controllers, two threshold elements, a differentiator, a JK flip-flop, a unit for establishing initial state, two repeaters and two display units. When the first and second programming terminals are closed and when the third programming terminal is connected to the third output, the device is transformed into a system for monitoring and controlling liquid level with its excited surface using the first and second outputs, which provides the mode for monitoring and maintaining the liquid level at a fixed height and the mode for filling and emptying the reservoir. When the first and second programming terminals are open and the third programming terminal is connected to the third output, the device is transformed into a system for monitoring and controlling liquid with its calm surface in the mode for monitoring and maintaining the liquid level at a fixed height and in the mode for filling and emptying the reservoir. The device provides vertical, horizontal and combined (vertical mounting of one and horizontal mounting of the other functional assembly) mounting methods.

EFFECT: increased functionalities of the device and wider range of controlled loads and mounting methods.

6 dwg

Tilt sensor // 2397443

FIELD: physics.

SUBSTANCE: tilt sensor consists of U-shaped tubular hydraulic gauge 1, filled with partially magnetic liquid 3. The ends of the tube are closed with covers 2. On one end of the hydraulic gauge there is a winding 4 connected to a preset resistor 7, indicator 5 and power supply 6.

EFFECT: remote and automatic determination of tilt angle.

3 dwg

FIELD: transport, distribution.

SUBSTANCE: proposed method comprises filling the tank with fluid and semi-fluid mixes, setting volumetric portion of mixes and draining said tank in dispensing said mixes. Mix level capacitive transducer is arranged inside tank along its height to be filled with mixes at a time with said tank. Structural characteristics of transducer and electrical performances depending thereon are invariable over its height in empty state of both transducer and tank. Maximum and minimum tank mix levels are set by appropriate transducers. Tank filling is terminated when mix level reaches that of mix top level transducer and started when it reaches that of mix bottom level transducer. Electric oscillation signal is generated at capacitive transducer. Electric oscillation signal amplitude is measured at capacitive transducer. Mix level signal is generated subject to measured electric oscillation signal amplitude at capacitive transducer. With top level transducer level reached by mix level, product of height from tolerable top to bottom mix levels and said electric oscillation amplitude is determined for said time interval. Mix level signal is corrected in relation to measured electric oscillation signal amplitude at capacitative transducer. With tank drained at beginning of another proportioning cycle, initial mix level generated signal is determined. Final proportioning mix level signal is defined as difference between mix level initial signal and quotient of mix volumetric portion and tank horizontal section inner area. Definite final level signal is compared with corrected mix level signal to terminate volumetric proportioning of mixes if said signals are equal. Proposed device comprises tank, mix level capacitative transducer, mix top and bottom level transducers, electric oscillation generator, signal transducer, pump and shutter control unit, pump and shutter assemblies and mix measured level indicator. Output of said generator is connected with capacitative transducer and signal transducer input. Mix top level transducer output is connected to first input of pump and shutter control unit with its second input and outputs connected to mix top level transducer output and appropriate inputs of pump and shutter assembly. Proposed device comprises also selector, setter of top measured mix level signal, mix portion and next mix proportioning moment start, computer and comparator. Signal transducer output is connected to computer first input and selector first signal input. To selector second control input connected is connection of mix top level transducer output, pump and shutter control unit first input and comparator output. Selector output is connected with computer second input. Computer third and fourth inputs are connected to first and second outputs of top measured mix level and next proportioning moment setting unit. Computer first input is connected to mix measured level indicator input and comparator first inverting input while its second output is connected to comparator second non-inverting input.

EFFECT: higher accuracy of control and proportioning.

2 cl, 3 dwg

FIELD: instrumentation.

SUBSTANCE: proposed method consists in breaking down power output in operation at load and idling into intervals defined experimentally. Then, fuel output at each interval of power output is calculated by appropriate formula. Obtained fuel consumption is compared to actual magnitude. This allows comparing actual consumption with design consumption without breakdown into power output and idling. Design total fuel consumption results from adding design fuel consumption and that in idling at preset time interval.

EFFECT: higher accuracy of determination.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: device comprises a generator of a high-frequency signal, a resistor, a level sensor, at least one pair - the first and second electrodes of a conducting material, installed at the specified distance d from each other in a holder from a dielectric material, a diode, a low pass filter (LPF), a unit of potential shift and a unit of output signal generation. At the same time the high-frequency signal generator is connected with the serially connected resistor, semiconductor diode, LPF, the unit of potential shift and the unit of output signal generation. The output from the upper end of the first electrode is connected to the common output of the resistor and the semiconductor diode, the output from the upper end of the second electrode - to an earth bus, and lower ends of both electrodes are submerged below the level of the measured water surface.

EFFECT: provision of higher resolving capacity by time, frequency and amplitude of measured physical values, higher functional flexibility, simplicity of realisation, increased reliability.

11 cl, 3 dwg

FIELD: measurement equipment.

SUBSTANCE: device contains two conductors designed as, at least, one conductor connected to the electronic indicator which is designed as resistance measuring instrument, meanwhile each conductor is placed in a conducting shell from conductive polymeric composition, and between conducting coatings and around them the water-permeable shell from capillary and porous material is located.

EFFECT: enlarging functional capabilities.

6 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to wireless fuel sensors for fuel tanks of vehicles. Provided is a fuel tank of a vehicle comprising a housing defining an inner region, a fuel level sensor connected to interior of device for radio frequency identification (RFID), electronically connected to fuel level sensor and operable for wireless transmission of signal indicative of fuel level in fuel tank and fuel pump inside fuel tank and which is part of host, which provides power to RFID device. Level sensor is sensitive to pressure of fuel and is a wireless device located at a point of fuel tank, remote from fuel pump. Another version is a fuel tank, comprising a housing having first and second interior regions, fuel pump is disposed in first interior region fuel intake device arranged in second interior region and in fluid communication with fuel pump, wireless fuel level sensor disposed in second interior region. Level sensor includes a strain gauge, in which electric resistance changes in response to pressure of fuel level.

EFFECT: proposed inventions are aimed at reduction of additional holes for leakage of fuel from fuel tank due to absence of wires, connecting fuel level sensor with external components.

9 cl, 9 dwg

FIELD: test and measurement equipment.

SUBSTANCE: invention relates to test and measurement equipment and may be used to measure inclination angles of objects and equipment installed on them. Angle measurement device mounted to object comprises a vertically arranged panel hollow toroid of paramagnetic material on which is wound a primary winding connected to output of sound generator. Above primary wind is wound a secondary winding comprising two identical sections by covering half of toroid and connected in series in opposite directions, free ends of secondary windings are connected to measuring instrument. Said toroid is half filled with a magnetic fluid.

EFFECT: technical result of disclosed group of inventions is improved measurement accuracy and reduced material and time costs, ensuring linearity of relationship between output signal and inclination angle.

2 cl, 2 dwg

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