SU1164566A1 - Device for checking pressure gauge - Google Patents

Abstract

A DEVICE FOR MODERNING THE MANOMETERS, containing a switch, an automatic pressure setting device, the pneumatic output of which is connected to a calibrating manometer, the electrical output is connected to the first input of the comparison circuit, the second input of which is connected to the output of the memory unit, and the output is connected to the recorder with the arrow turning f-; yes I 1 -4 J Бй5} й д -; I PPCHGL-. The t-4-jJi of the manometer has a gauge position gauge, which, in order to improve the performance of the gauge calibration process by automatically tracking the position of the gauge, gauge, is additionally introduced a reference frequency generator, a mechanism the displacement sensor position of the gauge needle, the circuit And and the trigger, while the reference frequency generator is connected to the first input of the circuit And, the second input of which is connected to the output of the trigger, to the first input of which the output of the sensor is connected The arrow of the manometer, and the second switch, ate from the output of the I circuit and connected to the first input of the memory unit, the second input of which is connected to the trigger output, and the third one to the output of the arrow position sensor, which is kinematically connected with the displacement mechanism.

Description

The invention relates to the control of the measuring technique, namely to the calibration of pressure gauges. A device containing an electric motor, a shaft, a rotor, a phase winding, an electric drive, an exemplary speedometer, arrows, scales, gears, a flexible shaft, a gearbox, an exemplary counter, terminals, rheostats and a crankcase is known. This device is due to the manual recording readings from calibrated and exemplary instruments and manual processing of the results of calibration cannot be used to automate the calibration process of instruments. The closest in technical essence to the invention is a device for calibrating pressure gauges, containing an automatic pressure setting device, whose pneumatic input is connected to a calibrated pressure gauge, and an electrical output to the first input of the comparison circuit, the second input of which is connected to the output of the memory unit, and the output to the input of the recorders, while the gauge of the position of the arrow, the pressure gauge 2 is installed coaxially with the arrow of the gauge to be turned. The known device also does not allow automating the calibration process of the pressure gauges, so ak disk duplicating a steady position arrow power metal emogo device is set manually, so calibration of pressure gauges, EMA carried by said device takes time. This leads to low productivity of the process of calibrating pressure gauges, which is especially significant when mass production of devices. The aim of the invention is to increase the productivity of the process of calibrating pressure gauges by automatic. tracking the position of the arrow of the manometer to be tested. The goal is achieved by additionally introducing a reference frequency generator, a mechanism for displacing the sensor position of the gauge needle, an AND circuit and a trigger for the reference frequency generator with the first input of the AND circuit, the second input of which is connected to the trigger output, to the first input of which is connected. the output of the gauge's position sensor, and the second switch, the output of the circuit I is connected to the first input of the memory unit, the second input of which is connected to the trigger output, and the third to the output of the arrow position sensor, which It is kinematically associated with the movement mechanism. The drawing shows a block diagram of the proposed device. The device contains a memory block 1, the output of which is connected to the first input of the comparison unit 2, the output of which is connected to the input of the display unit 3, and the second input - to the electrical output of the pressure control unit 4, the pneumatic output of which is connected to a calibrated pressure gauge 5, coaxially with the arrow of which has an arrow position sensor 6, switch 7. A calibrated frequency generator 8 is connected to the first input of logic circuit 9, the output is connected to the first input of memory 1, and the second output is connected to the third input of memory 1 and the trigger output 10, the fault input of which is connected to the switch 7, and the installation input with the second input of the memory block 1 and the arrow position sensor 6, which is kinematically connected with the movement mechanism 11 The memory block 1 is fed into the first input from the logic circuit 9 A signal whose frequency is equal to the calibrated frequency is recorded and remembers information on the current position of the arrow of the gauge being turned on. The memory unit 1 can be represented from the counter 12, overwriting keys 13 and the register 14 connected in series with each other. The counter 12 is reset by the reset input to its fault input at the third input of the memory block I from the output of the trigger 10, is reset to the initial, zero state, and by the signals input to the counting input at the first input of the memory 1 from the logic input schemes And 9, produces an account of the number of incoming them; pulses. The capacity of the counter 12 must be chosen so that at a given frequency of the signal generated by the generator 8 of the calibrated frequency, the counter 12 is reset after a full turn of the sensor 6 position of the arrow. The rewriting keys 13, according to the signal received at their inputs by the second input of the memory unit 1 from the arrow position sensor 6, are overwritten into the register 14 information from the counter -12. The register 14 is intended for. operational storage of information about the current position of the arrow. Logic And 9 on the signals arriving at its first input from the generator 8 of a calibrated frequency, and arriving at its second input from you. the trigger course. 10, the counting enable signal generates at its output a signal whose frequency is equal to the calibrated frequency. Comparison unit 2 compares the information on the current position of the arrow of the gauge to be turned, the flow to its first input from the output of memory block 1, with information about a given amount of air pressure in the calibrated pressure gauge, to its second input from the output of the control unit 4, and if the current position of the arrow does not correspond to the predetermined value of the air pressure, it generates an error signal at the output. The display unit 3 serves to indicate the error signal to the post. pakntsy to its input from the output of unit 2 of the comparison. one ,. .. The setpoint block 4 is represented from the setpoint 15, the first input of which is connected to the high pressure power supply 16, and the second input to the control unit 17. The source 16 is pi-. This high pressure is a source of compressed air. The command device 17 is used to set the pressure in accordance with the verification program of the corresponding value of pressure in the spirit. Unit 15 serves to generate a predetermined value of air pressure by a signal arriving at its input from the command device 17. As setpoint generator 15, high pressure power supply source 16, command equipment 17, similar elements used in device C2 J can be used. Movement mechanism 11 is connected kinematically with arrow position sensor 6 and serves to move arrow position sensor 6 relative to arrow of the gauge being turned. The sensor 6 for the position of the arrow is kinematically connected with the mechanism 11 for moving and, when it rotates at the moment of intersection of the arrow of the gauge being turned on 5, it forms a signal corresponding to the current position of the arrow. As an arrow position sensor 6, an optoelectronic system can be used, which has the possibility of circular rotation and consists of an LED and a photodiode, which move coaxially with the arrow of the gauge being tested and are installed under. angle to it and to each other so that the flux of radiant energy emanating from the LED, only if it crosses the arrow of the manometer 5 being turned, hits the photodiode. .The switch 7 generates a signal for the beginning of the reading. The calibrated frequency generator 8, the output of which is connected to the first input of logic gate 9, is designed to generate calibrated frequency signals and can be implemented using a multivibrator-auto-oscillator. The period of the signal generated by the calibrated frequency generator 8 must be chosen taking into account the required accuracy of the calibration of the manometer, since the current position of the arrow of the calibrated manometer is presented in a discrete form as the number of pulses, the accuracy of the calibration will be determined by the number of periods per unit of measurement of the manometer to be tested. The trigger 10, under the action of the input from the button 7, arriving at its reset, triggers the start of the reading, forms at its output a reset signal, which arrives at the third input of the memory 1, and under the action of the input of the signal of the arrow, corresponding to the current position of the arrow of the calibrated gauge, the resolution signal of the counting arriving at the second input of the logic circuit 9. The calibration of the gauge with the aid of the predicted device is performed in the following order. Immediately before the start of the overturn, the electric drive of the movement mechanism 11 is turned on. As a result, the sensor 6 is positioned arrows, kinematically connected to the movement mechanism I1, receives a rotational movement. Next, the position sensor 6 of the arrow is installed in the working position in the immediate vicinity of the protective glass of the turned manometer 5 so that the axis and the plane of rotation of the sensor 6 of the arrow position coincide respectively with the axis and the plane of rotation of the arrow of the manometer being turned 5. After installing the sensor 6, the position of the arrow in The working position includes a switch 7, which forms a signal to start the calibration of the pressure gauge. The trigger 10 is reset to the zero state by the action of the start of the manometer calibration signal arriving at its reset and generates at its output a reset signal received at the reset input of the counter 12 included in memory 1. The counter 12, by the reset signal, arriving at its fault code on the third input of the memory block 1 from the output of the trigger 10, is reset to the initial zero state. , The sensor 6 of the position of the arrow at its rotation at the moment of intersection of the arrow of the turned manometer 5 generates a signal corresponding to those. tilting position of the arrow. At the same time, the pressure gauge is not applied to the pressure gauge, therefore the arrow is in the initial zero position. In this case, the signal formed by the arrow position sensor 6 will correspond to the zero position of the pressure gauge arrow Trigger 10 under the action of the pressure gauge. at its installation input from the transmitter 6, the position of the arrow of the signal corresponding to the zero position of the arrow of the manometer being turned, forms at its output a signal of the counting permit, arriving at the second input of the logic circuit AND 9. The logic circuit AND 9 follows the signals arriving at its first the input from the oscillator 8 of the calibrated frequency, and the incoming signal from the output of the trigger 10 to the counting signal, form a signal at its output, the frequency of which is equal to the calibrated frequency. Account 12, which is part of block 1, memory, signals, arriving at its counting input on the first input of memory block 1 from logic circuit 9, counts the number of pulses arriving at it, so that at any given moment time, the number of pulses counted by the counter 12 will correspond to the deviation of the sensor 6 of the position of the arrow at this point in time from the zero position of the arrow of the gauge being turned 5. At the moment of the next intersection of the arrow of the gauge being turned 5 being in the zero position, the sensor 6 The track counter 1 2 goes to its original zero state. Thus, after turning on the switch and the first intersection of the arrow of the turned manomatr 5, which is in the zero position, the sensor 6 of the arrow position 6 registered the zero position of the arrow of the turned manometer and is ready to check the position of the arrow when it is at different points on the scale of the turnable manometer 5 In accordance with the verification program with the aid of the command device 1 7 and the setting device 15, through the pneumatic output of the unit 4. setting devices, the set value of the air pressure is supplied to the pressure gauge 5. the action of this pressure gauge needle power metal emogo 5 is deflected from its initial zero position. The magnitude of this deviation will correspond to the specified air pressure. .. The sensor 6 is the position of the arrow when it rotates at the moment of intersection of the arrow: the turned manometer 5 generates a signal corresponding to this non-zero position of the arrow. At the same time, at the moment of intersection of the arrow of the turned manometer 5 by the sensor 6 of the arrow, the number of pulses counted in the counter 12, included in the memory 1, corresponds to the deviation of the arrow of the turnable manometer 5 from its zero position. The rewriting keys 13, according to the signal received at their inputs by the second input of the memory block 1 from the arrow position sensor 6, overwrite the information on the current position of the arrow of the gauge 5 to be tested 5 from the counter 12 into the register 1A. The comparison block 2 compares the current position information arrows

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the calibrated gauge 5, which arrives at its first input from the output of the unit 4, adjusters, and if the current position of the arrow does not match the specified air pressure, it generates an error signal at the output. The error signal received from the output of the comparison unit 2 is recorded by the recorder.

All subsequent calibrations are carried out similarly to the first.

At the end of the calibration of this gauge sensor 6 position of the arrow

1645668

set to the working position

:. the next manometer to be calibrated and the calibrating of this manometer is performed in a similar order. 5 The readings are taken and the verification results are processed using the known device manually. Therefore, the use of this device will allow us to obtain a countervailing effect by increasing the productivity of the verification process, pressure gauges by automating this process.

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Claims (1)

DEVICE FOR CHECKING MANOMETERS, comprising a switch, an automatic pressure regulator, the pneumatic output of which is connected to the pressure gauge to be verified, an electrical output - with the first input of the comparison circuit, the second input of which is connected to the output of the memory unit, and the output - to the input of the recorder, while being aligned with the arrow of the manometer being verified, a gauge position indicator of the pressure gauge is installed, o t-. characterized by the fact that, in order to increase the productivity of the process of checking manometers by automatically tracking the position? with the pressure gauge’s arrow, the reference frequency generator, the mechanism for moving the gauge needle’s position sensor, circuit And and the trigger are additionally introduced into it, while the reference frequency generator is connected to the first input of circuit And, the second input of which is connected to the output of the trigger, the output of which is connected to the output the gauge’s arrow position sensor, and to the second - the switch, the output of circuit And is connected to the first input of the memory block, the second input of which is with the trigger output, and the third τ 'is the output of the arrow position sensor, which is kinematic ski is connected with the movement mechanism. ... SU „„ 1164566 1 ΐ164566 2