Electroconductive liquid leak sensor

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

 

The invention relates to measurement technology, in particular to indicating, recording and signalling devices actuated by electrical means, and can be used in particular as a sensor for determining the location of leaks of water and other conductive liquids, mostly on extended objects using hydrosensor cable.

It is known device [EN 2312954, C1, E03C 1/00, F24D 19/10, 20.12.2007], comprising a horizontally positioned perforated plate, water level sensor and a container with an open top, and the dimensions of the horizontal cross section of the container is smaller than the perforated plate, the capacitance attached to the perforated bottom plate with an offset to the edge, on the bottom of the tank there is a hole and inside the tank there is a water sensor and siphon, with the bend of the siphon is above the water level gauge, perforated plate, the holes are positioned such that at least one of them is over capacity, on top of a perforated plate is arranged in the side with a closed loop, covering all openings, except those that are over capacity, or a groove having a closed loop, covering all openings except those that are over capacity and one of which groove is closed.

The disadvantage of this device is �otnositelno narrow functionality not allowing to use it for extended objects, such as pipes.

Furthermore, it is known device [25222 EN, U1, G01M 3/10, G01M 3/26, 20.09.2002] includes a reservoir and accommodating the sensing element, which is made in the form of a rod, on which are mounted a high-precision ultrasonic Registrar of change of product level, temperature sensors, level sensor produced water and the electronic unit associated with a computer that provides software testing according to the temperature of the liquid and its level.

The disadvantage of this device is relatively narrow functionality as it is designed to detect leaks from tanks and its application to extended objects, such as pipes, functionally limited.

The closest in technical essence and the achieved result is a multi-touch, automatic electronic water sensor [RU 99156, U1, G01M 3/10, G01M 3/26, 10.11.2010], comprising a protective tube with a thrust bearing from a non-sparking metal with built in his terminal electrodes are connected via wires with electronic indicator containing the electronic circuit, the led and sounder connected to a power source and placed on the dashboard.

The disadvantage of this device is the relative�about narrow functionality because it is intended for indication of the presence of water in the tank without the possibility of detecting water that functionally limits its use for extended objects, such as pipes.

Problem will be solved by the proposed invention, is to expand the functional capabilities of the sensor by introducing additional Arsenal of technical means for ensuring its use for extended objects with identifying leaks of water or other conductive liquid.

The required technical result consists in extending the functionality of the sensor to allow its use for extended objects with identifying leaks of water or other conductive liquid.

The problem is solved, and the required technical result is achieved in that, in the device comprising two conductors, each of which is made in the form of at least one conductive core connected with electronic indicator, according to the proposed invention the electronic indicator is in the form of measuring the resistance of each of the conductors placed in a conductive sheath of a conductive polymer composition, and between the conductive membrane and is permeable sheath of capillary-�perhaps material.

In addition, the required technical result is achieved in that the conductive polymer composition used for the conductive shell, uses a composition based on the polyolefin and carbon black in a ratio of from 4:1 to 1:3.

In addition, the required technical result is achieved in that the permeable membrane of capillary-porous material is used or twisting Selenite, or glass roving.

In addition, the required technical result is achieved in that the conductive sheath of a conductive polymer composition is made with a surface resistance Rsin the range 1-103Ohm.

In addition, the required technical result is achieved in that the permeable membrane of capillary-porous material made in the form of continuous extended construction.

In addition, the required technical result is achieved in that the permeable membrane of capillary-porous material is made in the form of a bundle of capillary-porous fibers, which are wound on the conductor, placed in a conductive sheath of a conductive polymer composition, the trajectory in the form of a closed eights.

Under permeable membrane refers to a membrane that provides and entering through it, in the case of neo�frameworks, in addition to water and other conductive liquids.

The drawing shows the design of the leak detector, electrically conductive liquids:

- Fig.1 is an embodiment of a permeable membrane of the capillary-porous material in the form of continuous extended construction.

- Fig.2 is an embodiment of a permeable membrane of capillary-porous material in the form of a bundle of capillary-porous fibers, which are wound on the conductor, placed in a conductive sheath of a conductive polymer composition, the trajectory in the form of a closed eights.

The leak detector electrically conductive liquids comprising placed in a conductive shell 1 of a conductive polymer composition two conductors 2, each of which is made in the form of at least one of the conductive cores (multicore presents variant), which are connected with electronic indicator, made in the form of measuring the resistance (not shown).

In addition, between the conductive shells 1 and around them is permeable shell 3 from capillary-porous material.

The various embodiments of the permeable shell 3 from capillary-porous material. It can be made in the form of continuous extended structures (Fig.1) or in the form of a harness of Kapil�RNO-porous fibers, which is wound on the conductor, placed in a conductive sheath of a conductive polymer composition, the trajectory in the form of a closed figure of eight (Fig.2).

The drawing also shows the relative drop (jet) 4 water or other conductive liquid, and region 5 in the permeable shell 3 to which it has penetrated.

There is a sensor of conductive liquid leaks as follows.

For an embodiment of the permeable shell 3 from capillary-porous material in the form of a continuous extensive structure shown in Fig.1 placed in a conductive shell 1 of a conductive polymer composition two of the conductor 2 in the form of at least one conductive core, around and between which is permeable shell 3 from capillary-porous material, are located mainly along extended objects (pipelines, wells, mines, tunnels, etc.). The ends of conductors 2 with one side connected to an electronic indicator, made in the form of measuring the resistance (or voltage), and on the other hand, electrically insulating plugs, protecting the measuring circuit against short-circuit.

Consider the example of a water droplet 4 to the surface of capillary-porous material. Due to capillary mechanism of water absorbed them and u�remedies in region 5 closer to the conductors 2, placed in a conductive shell 1 of a conductive polymer composition. Eventually the water reaches the conductive shells 1 and creates an electrically conductive bridge contact between them. As a consequence, changes continuously measured the electrical resistance between the conductors 2 and is detected by the appearance of water. If you know the specific (linear) resistance of the conductors, the resistance value can be approximately determined and the place of occurrence of water (water leak) or other conductive liquid.

As the conductive polymer composition used for the conductive shell may be used in the composition based on the polyolefin and carbon black in a ratio of from 4:1 to 1:3, as a permeable membrane of capillary-porous material is used or twisting Selenite, or glass roving, which provide penetration and other liquids, as well as perform the role of fire resistant sheath that protects the cable from the distribution by him of the fire in case of fire.

In addition, a conductive sheath of a conductive polymer composition may be formed with a surface resistance Rsin the range 1-103Ω (smaller value of Rsmay not provide the required sensitivity of the sensor, and meant more�not easy to see where water leaks with sufficient accuracy), a permeable membrane of the capillary-porous material can be performed either in the form of a continuous extensive structure, or in the form of a bundle of capillary-porous fibers, which are wound on the conductor, placed in a conductive sheath of a conductive polymer composition, the trajectory in the form of a closed eights.

For an embodiment of the permeable shell 3 from capillary-porous material in the form of a bundle of capillary-porous fibers, which are wound on the conductor, placed in a conductive sheath of a conductive polymer composition, the trajectory in the form of a closed figure of eight (Fig.2) there is the following feature of the application.

Consider the example of getting 4 drops of water on the surface of the permeable shell 3 from capillary-porous material in the form of a bundle of capillary-porous fibers. Water is distributed into force of the fiber structure of the shell 3 is predominantly along the grain. Therefore, the formation of a conductive bridge contact in such structures is faster and requires less water compared to the above option, i.e. the sensitivity of the device increases.

Thus, thanks to the introduction of an additional Arsenal of technical means (such as electronic display in the form of measure�La resistance and also the fact that each of the conductors is placed in a conductive sheath of a conductive polymer composition, and between the conductive membrane and is permeable sheath of capillary-porous material) are in place to achieve the desired technical result consists in the extension of functionality by the possibility of its application for extended objects with the definition as fact, and specific leaks of water or other conductive liquid.

1. The leak detector, conductive liquids that contains two conductors, each of which is made in the form of at least one of the conductor connected to the electronic display, wherein the electronic indicator is in the form of measuring the resistance of each of the conductors placed in a conductive sheath of a conductive polymer composition, and between the conductive membrane and is permeable sheath of capillary-porous material.

2. The device according to claim 1, characterized in that the conductive polymer composition used for the conductive shell, uses a composition based on the polyolefin and carbon black in a ratio of from 4:1 to 1:3.

3. The device according to claim 1, characterized in, h�about as permeable membranes of capillary-porous material is used or twisting Selenite, or glass roving.

4. The device according to claim 1, characterized in that the conductive sheath of a conductive polymer composition is made with a surface resistance Rsin the range 1-103Ohm.

5. The device according to claim 1, characterized in that the permeable membrane of capillary-porous material made in the form of continuous extended construction.

6. The device according to claim 1, characterized in that the permeable membrane of capillary-porous material is made in the form of a bundle of capillary-porous fibers, which are wound on the conductor, placed in a conductive sheath of a conductive polymer composition, the trajectory in the form of a closed eights.



 

Same patents:

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: 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: 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

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: 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

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: 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 two functional assemblies and allows two programming leads of functional capabilities and four outlets. At closed programming leads device is transformed into monitoring and regulation system of liquid level with usage of the first and the second outlets of device, providing monitoring mode and keeping of liquid level at fixed height and mode of filling and emptying of a reservoir with liquids. At open programming leads device is transformed into set of level control of top and bottom levels of controlled liquid of conducted type, outlets of which are correspondingly the third and the fourth outlets of the device. Device provides vertical, horizontal and complex (vertical installation of one and horizontal installation of other functional assembly) methods of installation. Device provides setting of control accuracy of liquid level in control mode and keeping of liquid level at its fixed height. Invention provides control of loads in the form of electromagnetic relay, two windings of contactor starter and outlets of logic elements.

EFFECT: extended capabilities of device by means of providing of regulation of liquid flows level at fixed height with ability of programming of its functional capabilities and nomenclature increasing of controllable loads and methods of its installation.

5 dwg

Discrete sensor // 2047106
The invention relates to the instrument and can be used to measure with precision fluid levels of various types using standardized sensors

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 two functional assemblies and allows two programming leads of functional capabilities and four outlets. At closed programming leads device is transformed into monitoring and regulation system of liquid level with usage of the first and the second outlets of device, providing monitoring mode and keeping of liquid level at fixed height and mode of filling and emptying of a reservoir with liquids. At open programming leads device is transformed into set of level control of top and bottom levels of controlled liquid of conducted type, outlets of which are correspondingly the third and the fourth outlets of the device. Device provides vertical, horizontal and complex (vertical installation of one and horizontal installation of other functional assembly) methods of installation. Device provides setting of control accuracy of liquid level in control mode and keeping of liquid level at its fixed height. Invention provides control of loads in the form of electromagnetic relay, two windings of contactor starter and outlets of logic elements.

EFFECT: extended capabilities of device by means of providing of regulation of liquid flows level at fixed height with ability of programming of its functional capabilities and nomenclature increasing of controllable loads and methods of its installation.

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

Up!