Air humidity detector |
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IPC classes for russian patent Air humidity detector (RU 2332701):
      
 System of automatic temperature profile support in reactor / 2326424
Invention relates to the chemical industry, particularly to the automatic control systems and can be used for temperature support of the reaction mixture in chemical reactors. The system of automatic temperature profile support in the reactor with distributed constants in maleic anhydride production contains two control systems: cascade automatic control system (ACS) of coolant temperature control in the reactor and ACS of benzene-air mixture fed to the reactor where the correction signal is inleted according to reaction mixture temperature. The correction signal represents the sum of the signals about reaction mixture temperature in the measurement points positioned along the reactor height multiplied to the weight factor determined intuitively or from optimization problem solution. Then the correction signal is compared with assignment signal on the functional generator serving as algebraic adder. The invention allows to increase the temperature support accuracy in the reactor at maleic anhydride production.
 System of engine fuel supply / 2325547
System of engine fuel supply consists of fuel tank wherein the following is installed: a level meter connected to the inlet of a "fuel-water" level regulator, and a control valve to flow out commodity water; the said valve is connected to a control outlet of the regulator. The level meter is made as two sensors of the fuel level, located in a portion of the lowest allowable fuel level mainly at opposite sides of the tank and one water level sensor located at the flow out level. The control valve is assembled so as to provide a positive feedback with the regulator upon receiving a signal on water presence and a negative feedback when there is no signal entry. At the moment of a positive feedback and water flow out the regulator is programmed to let out not more than 100 kg of fuel.
 Method of controlling process of thermal destruction of petroleum residues in pipe furnace / 2318858
Method according to invention determines pressure gradients at exit and entrance in each section of the furnace and real gradient is compared to projected gradient, after which, depending on disagreement value, this value is diminished via variation of fuel consumption in corresponding furnace burner. Projected gradient is calculated using formula: ΔPi=k(L1+b)n, wherein ΔPi is pressure gradient in i-th section of coil, %; k, b, n are coefficients depending on conversion value, nature of raw material, and projected quality of final thermal destruction products; and L1 reduced length of coil from its beginning to i-th measurement point, %.
 Separator / 2314876
The invention is pertaining to the devices for purification of the gas flow from the solid and liquid particles and may be used in the different branches of industry and at the enterprises of the agro-industrial complex at operation of the pneumatic actuators, pneumatic installations, and also in need of usage in the production processes of the air and other gases. The separator is supplied with the automatic control system connected to the electrical slide valves connected with the inlet fitting pipe, the purified gas outlet fitting pipe and the fitting pipe for withdrawal of the separated particles. The separator also is supplied with the sensors of the temperature, humidity and pressure disposed on the inlet and outlet fitting pipes, the sensor of the level of the separated particles allocated in the lower part of the storage bin, the sensor of the gas flow speed connected to the gas flow speed controller. The sensors and the rotary valve drive are connected to the automatic control system. The technical result of the invention is automation of purification of the polluted gas flow from the solid and liquid particles at the heightened purification efficiency.
 Method of control over the process of decomposition of the aluminate solution in the alum earth production / 2310607
The invention is pertaining to the field of nonferrous metallurgy and may be used to control the inertia processes, the outlet parameter of which is nonlinearly, predominantly extremely, linked with the inlet parameters. The method to control the process of decomposition of the aluminate solution in production of the alum earth exercised in the battery of the sequentially connected apparatuses- decomposers supplied with the devices of cooling of the source aluminate solution and the decomposing pulp, the devices of separation of the decomposing pulp at the battery outlet into the large-sized production fraction and small-sized fraction in compliance with the dimension of the solid particles in the pulp, with feeding of the source aluminate solution into the head decomposer, and the small-sized fraction and the part pf the large-sized fraction - in the capacity of the streams of the seed - in the decomposers of the head part of the battery provides for measurements of the consumption of the aluminate solution inlet stream, measurement of the consumption of the seed stream, the temperature of the aluminate solution and the pulp, contents of the aluminum oxide and the caustic alkali in the aluminate solution, contents of the particles of the preset class in the commercial hydroxide, stabilization of consumption of the seeds streams, the temperature of the aluminate solution and the decomposing pulp and alterations on each step of the control of the preset stabilizing values. The preset for stabilization at each step of the control values of the consumption of the seed streams and the temperature of the inlet aluminate solution and the decomposing pulp are determined by means of the approximated mathematical model consisting of in series connected the linear dynamic link, which inlets are the measured values of all indicated parameters, and the linear static link determining the predictable value of the speed of fluctuation of the contents of the particles of the preset size in the commercial hydroxide, average and centered the measured values of all parameters, depending on which and on the predictable value of the speed of fluctuation of the contents of the particles of the preset size determine and set the given for stabilization on that step of control the values of the parameters. The invention allows to maintain the quality of the ready product - the contents of the preset fraction of aluminum hydroxide.
 Method for moisture stabilization of dairy butter / 2302108
Continuous action butter machine includes seasoning reservoirs, churning machine with mixer and normalizing component batching pump. At outlet of continuous action butter machine, value of expected butter moisture deviation is determined from a formula. Churning machine mixer rotation frequency is controlled together with feeding of normalizing component depending on deviation of moisture from given value with consideration of value of expected component.
 Device of the automatic control over the reactor of the semi-continuous operation / 2299094
The invention is pertaining to the field of the control over the reactor of the semi- continuous operation (RSCO) at the variable consumption of the liquid batched component. The device contains the service tank for the liquid batched component, the reactor supplied with the stirrer, the coiled pipe and the jacket, the heat converter located in the reactor, the level sensor mounted in the service tank, the electro-pneumatic digital transducers intended for control over the pneumatic drives of the cut-off and discharge valves, the static power supply. The device is additionally supplied with the static three-channel power source, the pressure and consumption sensors arranged on the pressure branch pipe of the batcher and the electro-conductivity in the reactor, the meters of the frequency and voltage of the power delivered to the engines of the batcher and the stirrer, and also the power consumed by the consumption indicator, the microprocessor controller intended for implementation of the functions of the cascade system of the temperature stabilization of the reaction mass in the reactor and the program-pulse-revercive system making regulation of the rate of rotation of the engine of the stirrer, and also forming the control actions delivered to the electro-pneumatic transducers and through the static three-channel power supply - to the engines of the batcher, the stirrer and the consumption meter. The technical result of the invention is reduction of the batching duration, the increased production of the target product, improvement of the product quality ratings.
 Method for stabilizing of butter moisture normalization process / 2298918
Method involves regulating rotational frequency of churn mixer and feeding normalizing component depending on butter moisture content deviation from predetermined value; changing cream churning temperature depending on changing of butter moisture content deviation from predetermined value. When butter moisture content is below predetermined value, cream temperature is changed by value equivalent to normalizing component dosing value. When butter moisture content is above predetermined value, cream temperature is changed by value equivalent to butter moisture content deviation from predetermined value. Method allows butter yield to be increased to more than 180 kg per working shift.
 Method for automatically controlling thermal processing of concrete under conditions of open construction site / 2297025
Method includes heating of placed mixture, measurement of temperature of mixture, limiting of temperature of surface layer of mixture, exposure of concrete till achievement of required hardness, measurement of temperature of outer air and wind speed. Then, temperature-time schedule of thermal processing of concrete is formed and required minimal electric power for realization of thermal processing process is determined in accordance to generated temperature-time graph. Energy provision of construction area is realized in accordance to preliminarily set conditions of consumption of electric power and realization of temperature-time schedule of thermal processing of concrete.
 Method of controlling cyclohexanol or cyclohexanone production processes / 2296741
Invention relates to production of cyclohexanol or cyclohexanone via hydrogenation of phenol or benzene with hydrogen in presence of catalyst and diluent followed by hydration in case of using benzene as starting material. Process is characterized by that hydrogen and benzene or hydrogen and phenol preheated in heat exchanger, provided with condensate intake control circuit, and circulation gas are supplied to vaporizer and preheater, provided with heating steam consumption control circuits, through supply lines provided with shutoff valves. Phenol or benzene and circulation gas, as well as heating steam and condensate consumptions are specified and adjusted. Preheated mix is then fed into separator to separate gas from liquid phase, which is removed, while remaining gas mixture is sent to hydrogenation reactors comprising temperature control zones and heat-extracting tube-type condensers and provided with phenol or benzene, hydrogen and condensate control circuits, temperature sensors connected to controllers to adjust consumptions of phenol or benzene, hydrogen and condensate, and wherein diluent volume level compared to that of catalyst is controlled and hydration temperature is measured. Resulting product enters cooler and then separation column provided with cyclohexanol or cyclohexanone recovery level control and adjusting, wherefrom it is directed to gas circulation line comprising cooler, separator, and compressor equipped with pipelines with circulation gas consumption control circuits.
 Unit of coupling tail car block / 2326779
Unit includes mechanical fastening and the pneumatic coupling effected via to gearing of the head of the braking mainline connecting hose with the mating part. The mating part is fitted on the car block. The attachment to the vertical edge is made in the form of enveloping straps with the threaded elements at the edges fastened by screws passed through the coupling unit casing. The connecting hose head joins the mating part input hole, gets pressed down by one of the running mating part elements and locked by the element locking fixture.
 Automatic control method and device / 2325682
Said method and device relate to automatic control systems with pulse-width encoder, which, by means of "greater" or "less" pulses, controls position-control servomechanism, which acts on the item being controlled. Automatic control method and device with pulse-width encoder and position-control servomechanism based on detecting a control error signal as a difference between the system output signal and setup signal, conversion thereof by the controller according to specified law of control into control action, further generation, by pulse-width encoder, of a series of pulses, which move the position-control servomechanism in the "greater" or "less" direction, acting on the item being controlled. Minimum pulse duration in the pulse-width encoder changes dynamically and depends on control error modulus change signal, bounded below and above by minimum and maximum permissible pulse duration values.
 Digital integral controller / 2325681
Said invention relates to digital automatic control systems and may be used in engine speed control systems and various machines' position control systems. Technical effect is achieved due to presence of adder units and registers, a multiplexer, a logic unit, a multiplier, a square-wave generator, a timing unit, a limiting unit, a setup signal input, a feedback signal input, a setup signal end value input, a setup signal timing input, a feedback signal timing input, a setup signal end value timing input, a band signal input, a setup parameter input and a controller output in digital integral controller.
 Wideband system of frequency phase autotuning for cryogenic generator / 2319300
System can be used for phase automatic tuning and stabilization of frequency of generators. System has generator based upon long Joseph's junction (JJ), two cooled HEMT generators, harmonic mixer based upon superconductor-insulator-superconductor (SIS) junction, reference synthesizer efficient within 19-20 Hz frequency range, phase detector made on base of tunnel SIS junction, lower frequency loop LC-filter, reference frequency synthesizer operating within 0,1-1 GHz. Phase detector, JJ generator, harmonic mixer, two cooled HEMT amplifiers and lower frequency loop LC-filter are disposed inside cryogenic cryostat.
 Method for controlling an object (variants), control system (variants), signal processing device and astaticism increase block for realization of device / 2318234
In the method for controlling an object, which includes extraction of control error signal, filtration of control error signal and generation of object control commands in accordance with this signal, compensation for phase delay of control error signal is realized by taking object control commands into consideration during error signal filtration. In a variant of object management, which includes extraction of control error signal and generation of object control commands, which contain a component which is proportional to integral of control error signal, correction of object control command component, proportional to error integral, is performed depending on value of control error signal.
 Automatic drive / 2318233
Automatic drive contains adder, amplifier, executive drive, load position sensor, speed sensor, first comparator, second comparator, AND circuit, time relay and blocking circuit.
 Automatic drive / 2318232
Automatic drive contains adder, amplifier, executive drive, load position sensor, speed sensor, momentum sensor, first comparator, second comparator, AND circuit, time relay and blocking circuit.
 Method for controlling direct-current drive / 2313173
Proposed method for controlling DC drive includes electric motor connection to power supply by means of switching unit controlled by pulse-width modulated signal generated by feedback computing device using results of comparing actuating device sensor data and target data, power-supply pulse-to-pulse interval being longer than braking time till complete stop of motor.
 Device for feedback control of production processes / 2309443
Device comprises phase modulator with six input channels, unit for illegible logical output composed of a law data base, database of identification functions, and comparing unit, phase demodulator, actuating member, object to be controlled, and feedback pickup. The input of the feedback pickup is connected with the output of the object to be controlled, and its output is connected with one of the inputs of the phase modulator. The remaining inputs of the phase modulator are connected with the autonomous signal sources.
 Controller with a relay characteristic / 2302029
Device contains extreme point indicator, relay block, adder, switch, zero-organ and is a two-positional controller with alternating hysteresis, value of which linearly depends on auto-oscillation amplitude of controlled coordinate. Special feature of the controller is that hysteresis in it may be either positive or negative.
 Method and device for automatic control of nuclear reactor power / 2244350
Proposed method includes maintenance of desired neutron power involving generation of relay control signals in response to neutron power error signal depending on its magnitude and polarity; desired value of neutron power is shaped depending on pressure error signal by adding proportional and integral components of desired neutron power, and integral component of desired neutron power is not shaped when control signal is applied. Nor is integral component of neutron-power desired value shaped when modulo pressure error signal is lower than pressure dead zone, and proportional component of desired neutron power value is produced with coefficient of proportionality changed depending on pressure error signal and is limited in value; in absence of automatic control integral component of desired neutron power is set to value causing zero neutron-power error signal. Device implementing this method is provided in addition with relay unit, one more OR gate, one more control switch, switch, first and second push-buttons, power supply, and nonlinear unit.
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FIELD: physics. SUBSTANCE: invention can be applied for automated systems of microclimate control in closed warehouse space for improving accuracy of heat and humidity calculation in controlled variable air medium. Detector contains temperature sensor, relative humidity and atmospheric pressure detectors, temperature converter to air vapour pressure, and computing unit. Using of converter and atmospheric pressure detector allows for increased accuracy of humidity detection. Invention provides automated real-time humidity and increased accuracy of humidity detection. EFFECT: increased accuracy of air humidity detection with automatic microclimate detection and control. 1 dwg
The present invention relates to the field of control and regulation of the moisture content of the air environment for automated management of microclimate parameters storage for agricultural purposes. A device control parameters of the air, including moisture content, which has temperature sensors, relative humidity and logical block [1]. A device that implements the determination of moisture content in the structure of the invention [1], adopted for the prototype. The disadvantage of this device is the low accuracy of determination of the moisture controlled environment. This disadvantage is due to the fact that the moisture content is taken into account indirectly, without regard to the actual partial pressure of water vapor corresponding to measured values of relative humidity and temperature. In addition, it is not considered a valid atmospheric (full) pressure change which depends on the moisture content of the air environment. This dependence is described by the known formula, see, for example, in [2]:
where d is the moisture content, g/kg; ϕ - relative humidity, O.E.; In - air (full) pressure, mm RT. Art.; Pn- partial pressure of water vapor in a state of complete saturation of moist air (saturation pressure), mm RT. Art. Invirginia (1)shows, the accuracy of determining the moisture content depends on the accuracy of relative humidity, atmospheric pressure and saturation pressure Pn. It is known [2]that the parameter Rnnonlinear image depends on the temperature and moisture content can be determined from the measured values of temperature and relative humidity using a tabular or graphic-analytical method. For automatic devices these methods is practically difficult to use, therefore, is most appropriate analytical method for determination of moisture content in which the parameter Rnalso determined analytically. In this case, the accuracy of the parameter Rnwill depend on the accuracy of the measured temperature values and the accuracy of the calculations used approximation of the dependence of this parameter on temperature. Indirect account of moisture content used in the device prototype, cannot provide high accuracy of its determination. The technical task of the invention is to improve the accuracy of determining the moisture content of the air environment with automatic detection and regulation of microclimate parameters. The solution of this problem is achieved in that in a device containing a temperature sensor, relative humidity sensor, a call is received block conversion temperature in the saturation pressure of water vapor in the air environment, an atmospheric pressure sensor and the computing device, the computing device includes first and second blocks multiplication, subtraction unit and the unit, each block multiplication has first and second inputs and one output, the subtraction unit has direct input and input of the subtraction, the unit has input the numerator and the sign of the denominator, the output of the temperature sensor is connected to the input of the conversion unit of temperature in the saturation pressure of water vapor, the output conversion unit connected to the first input of the first block multiplication, the output of the relative humidity sensor is connected to the second input of the first block multiplication, the output of the first block multiplication connected to the input of subtracting block subtraction and to the first input of the second block multiplication, the output of an atmospheric pressure sensor connected to the direct input of the subtraction, the output of the subtraction unit is connected to the input of the denominator of the unit, the output of the second block multiplication is connected to the input of the numerator of the unit, to the second input of the second unit multiplying the submitted value of the DC coefficient, and the output unit is an output device. Distinctive features of the claimed device in relation to the prototype are: presence of unit conversion temperature in the saturation pressure of water vapor in the air environment, the presence of atmospheric sensor on the effect, the structure of the computing device, the configuration of the connections between the transducer, sensors and computing devices. Comparative analysis of the claimed device with the prototype allows to make a conclusion on the conformity of the proposed technical solution the criteria of the invention of "novelty." Of patent and technical literature is not detected by the proposed set of distinctive features and connections of the elements of the claimed device. Thus, the proposed device meets the criteria of the invention "inventive step". The essence of the inventive device for determining the moisture content of air is illustrated the block diagram, shown in the drawing, showing: 1 - temperature sensor t; 2 - sensor atmospheric pressure; 3 - relative humidity sensor ϕ; 4 - unit conversion temperature in the saturation pressure of water vapor in the air environment Rn; 5 - the first block multiplication, with two inputs (marked by arrows) and one output; 6 - block subtraction with one direct input 7 and input to the subtractor 8; 9 - second block multiplication, having first and second inputs, the second input unit 9 multiplication is fed the value of the scale factor D, the unit 10 having an inlet 11 numerator, the sign of the denominator 12 and the output d, which is the output device is TBA. The device operates as follows. The measured value of the air temperature t from the output of the temperature sensor 1 is fed to the input of the conversion unit 4. In unit 4 is implemented dependence of partial saturation pressure Pntemperature, for example, according to the expression:
where - 750,06; N=8,61166(1-1,3358/τ+7,868·10-2·τ-0,952·lgτ); τ=1+t/To; t is the temperature of the moist air, °C; Tabout=273,16K. The output of block 4 is formed is calculated by the expression (2) to the value of Pn. Calculations show that in the temperature range from minus 30°to + 50°With the error in the determination of Pndoes not exceed 0.5% compared to the tabular values of the real parameters of state of moist air [3]. The obtained value of the parameter Rnarrives at the first input of the first block multiplication 5, to the second input of the first unit of the multiplication is supplied measured value of relative humidity ϕ from the sensor 3. The output of the first block multiplication 5 is formed piece ϕPn, which is the actual partial pressure of water vapor of air at a given temperature t. Work ϕPnserved on a subtractive input 8 of the subtraction unit 6 and the first input of the second unit 9 multiplication, the second I is d which is the value of the coefficient D, depending on the dimension defined moisture content: the value of D=622, if the pressure determined in mm RT. Art. and the dimension of the determined moisture content [g/kg]; a value of D=0,622, if the dimension of the moisture content [kg/kg]. The output of the second unit 9 multiplication produces work InϕPnapplied to the input of the numerator 11 of the unit 10. At the entrance of the denominator 12 of the unit 10 is supplied to the pressure difference (In-ϕPn), which is formed at the output of the subtraction unit 6, as a direct input 7 is set to full (atmospheric) pressure formed at the output of the pressure sensor 2. The output of block division is formed, the value of d=ϕPn/(In-ϕPn)uniquely identifying the content. The proposed device for determining the moisture content of air can provide better accuracy by introducing a conversion unit temperature pressure saturation, providing high conversion accuracy by the proposed approximation tabular dependence of partial pressure saturation temperature. In addition, the actual value of the atmospheric pressure measured by the pressure sensor also reduces the error in determining the actual values of moisture content. The proposed device allows high accuracy to determine Rea is inoe value of moisture content in the automatic mode when the regulation and control of parameters of microclimate indoors agricultural and domestic purposes. The layout of the device proves its efficiency and effectiveness. Thus, the proposed device meets the criteria of the invention "industrial applicability". A device for determining the moisture content of the air environment containing a temperature sensor, relative humidity sensor, characterized in that it additionally introduced unit conversion temperature in the partial pressure of saturated water vapor air, an atmospheric pressure sensor and the computing device, the computing device includes first and second blocks multiplication, subtraction unit and the unit, each block multiplication has first and second inputs and one output, the subtraction unit has direct input and input of the subtraction, the unit has input the numerator and the sign of the denominator, the output of the temperature sensor is connected to the input of the conversion unit of temperature in the partial pressure saturation of water vapor in the air environment, the output of the conversion unit connected to the first input of the first block multiplication, the output of the relative humidity sensor is connected to the second input of the first block multiplication, the output of the first block multiplication is connected to the input of a subtraction unit subtracting and to the first input of the second block multiplication, the output of an atmospheric pressure sensor connected to the direct input of the block you the power supply is the output of the subtraction unit is connected to the input of the denominator of the unit, the output of the second block multiplication is connected to the input of the numerator of the unit, to the second input of the second unit multiplying the submitted value of the DC coefficient, and the output unit is an output device.
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