SU934226A1 - Apparatus for testing pneumatic devices - Google Patents

Description

(54) DEVICE-FOR MONITORING PNEUMATIC INSTRUMENTS

one

The invention relates to measuring and controlling the response characteristics of discrete pneumatic devices, relays, alarms, and the like.

A known device for controlling pneumatic devices, containing a sawtooth pressure generator, a remote controlled indicator, a trigger with inverse outputs, a memory cell and an adder, the trigger input with inverse outputs being connected to the input channel of the device OUTPUT of the monitored relay, inverse output trigger channels - with control chambers of the first and second memory cells, the inputs of which are connected to the output of the sawtooth pressure generator, and the outputs to the first and second inputs of the indicator with a remote control m control and to the positive and negative cameras of the adder, the output of which is connected to the third input of the indicator with remote control 1.

However, the known device has a narrow field of application, since it implements the control of instruments that realize the exceptional function of YES.

The closest in technical essence to the invention is the device

for monitoring pneumatic devices, comprising a sawtooth generator, a remote controlled indicator, memory cells, a reference element, a trigger with mutually inverse outputs and

5, a defect analyzer consisting of an OR element and an inverter, with the trigger input with mutually inverse outputs connected to the input channel of the device, inverse output channels — with control cameras, 0 first and second memory cells, the outputs of which are connected, to the output of the sawtooth generator, and the outputs to the first and second inputs of the indicator with remote control and to the positive and negative cameras of the reference element, the output

15 which is connected to the third input of the indicator with a remote control, mutually inverse outputs of the trigger are connected to the control inputs of the sawtooth generator, the control chamber of the inverter is connected to the output of the adder and the exhaust channel is Go, the output of the inverter is connected to the output channel of the device Scrap, and its power nozzle - with the output of the OR element, one input of which is connected to the inverse output of the trigger and the power nozzle of the adder, and the other input - to the output channel of the tripping signal of the saw generator pressure, wherein the second element minus the camera is connected to the comparison signal channel minimum differential value 2. However, this device .Also has a narrow field of application, since impossible serial relay control .avtomaticheskom mode logic circuits of YES and NO.

The purpose of the invention is to expand the scope.

This goal is achieved by the fact that in a device for controlling pneumatic devices comprising a sawtooth generator, a first inverter and a switch, the first switched input of which is connected to the input of the first inverter and to the input channel of the device, and the second switching input is connected to the output of the first inverter, trigger with mutually inverse outputs, the input of which is connected to the output of the switch, and the outputs with the control inputs of the sawtooth generator of the memory cell, the control input of the first of which is soy dinene with a direct trigger output with mutually inverted outputs, a control input of the second — with an inverse output of the given trigger, inputs — with an output of a saw-tooth generator, a reference element, the plus chamber of which is connected to the output of the first memory cell, the first minus one — with the output of the second cell memory, the second minus one - with the signal channel of the minimum allowable differential value, a defect analyzer consisting of a second inverter, whose input is connected to the output of the reference element, and an indicator with a remote control The inputs, which are connected to the output of the sawtooth pressure generator, with the outputs of the first and second memory cells and with the signal channel of the minimum allowable differential value, have installed the first and second triggers with separate inputs, the BAN element, the time relay, three pulsers, the counting trigger, the element And, PI, the third inverter and switch of input signals, and in the analyzer, rejects are installed five elements And two and the fourth and fifth triggers, with separate inputs, and the output of the first trigger with separate inputs is connected to trigger supply channels with inverse outputs and the third inverter, and with the inputs of the BANGE element, the output of which is connected to the time relay input, the time relay output is connected to the power supply channels of the monitored relay and the first inverter, to the control input of the sawtooth pressure generator, and to the input of the first pulser, the output of which is connected to the reset input of the trigger with mutually inverse outputs, the input of the counting trigger is connected to the output channel of the generator tripping signal, the first output of the counting trigger is connected to the input of the second pulser, and the second with the first input of the OR element, the second input of which is connected to the input of the second trigger with separate inputs and the output of the third pulse, the input of which is connected to the output of the second pulse; the output of the second trigger with separate inputs is connected to the control input switch, with the first control channel of the input switch and with the input of the third inverter, the output of which is connected to the second control channel of the input switch, to the inputs of which the output is connected

 the sawtooth pressure generator and pressure feed channels of the sub-supports, the outputs of the input switch are connected to the output channels, the first inputs of the first and second elements AND are connected to

0 output of the adder, the first inputs of the third and fourth elements And connected to the outputs of the second inverter, the second inputs of the first and third elements And connected to the second output of the counting trigger, the second inputs of the second and fourth elements And connected to the output of the second pulser.

the output of the second element And is connected to the input of the fourth trigger with separate inputs, the output of which is connected to the first input of the fifth element. And, the second input of which is connected to the output of the first element And, the output of the fifth element And is connected to the output channel of the device. The fourth element I stroke is connected to the input of the fifth trigger with separate inputs, the output of which is connected to the output channels of the device. “The marriage is YES, the output of the third element I is connected by the output channels of the device. “The marriage is NOT, the drop inputs of the first and the fifth trigger with separate inputs and the counting trigger are connected to the input channel“ Stop, and the installation input of the first trigger with separate inputs - to the input channel “Start.

This allows the automatic control of the relay according to the scheme "YES and according to the scheme" NOT with remembering the intermediate result of the control.

The drawing shows a schematic diagram of the device ..

The device contains a sawtooth pressure generator 1, an input signal switch 2, an inverter 3, a switch 4, a trigger 5 with mutually inverse outputs, memory cells 6 and 7, an adder 8 — a comparison element, a fault analyzer 9, a remote control indicator 10 and a circuit

management The reject analyzer 9 consists of an inverter 11, two-input elements AND 12-16, triggers 17 and 18. The control circuit consists of a trigger 19, an element BANE 20, a time relay 21, pulsers 22-24, a counting trigger 25, two-input element OR 26, a trigger 27 and the inverter 28. The controlled relay 29 is connected by inputs to the outputs of the device FIRST i and Pg,;, 2, and the output to its input,. The output of the sawtooth pressure generator 1 is connected to the inputs of memory cells 6 and 7, with one of the inputs of the indicator 10 with remote control and with one of the inputs of the switch 2 input signals, the pressure channels of the overpressure control pump are connected to the remaining inputs of the switch 2. and РЛОДП. 2, the outputs of the switch 2 are the output channels of the OUT 1 OVER 2 devices. The input channel of the PBX device is connected to the input of the inverter 3 and to the first switching input of the switch 4, to the second switching input of which the output of the inverter 3 is connected, the output of the switch 4 is connected to the input the trigger 5, the direct output of which is connected to the control input of the memory cell 6, and the inverse with the positive camera of the comparison element 8 and with the corresponding input of the remote control indicator 10, the output of the memory cell 7 is connected to the negative one element 8 camera (Comparison and with the corresponding input of the indicator 10 with remote control, the second minus camera of the Comparison element 8 is connected to the RZED channel. The minimum allowable differential value and with the corresponding input of the indicator 10 with remote control, and the output of the Comparison element 8 is connected to the input of the inverter 11 and the inputs of the elements 12 and 13, the output of the element 12 is connected to the input of the trigger 17, the output of which is connected to the input of the element 14, the second input of which is connected to the output of the element 13 and the output is connected to the output dnym channel "Pass. The output of the inverter 11 is connected to the inputs of the elements 15 and 16, the output of the element 16 is connected to the output channel "NO marriage, the output of the element 15" is connected to the input of the trigger 18, the output of which is connected to the output channel "marriage 15. The trigger inputs 19 are connected to the Start and Stop input channels, the output is connected to the power channels of trigger 5 and inverter 28 and connected to the input of the BAN 20 element, the output of which is connected to the input of the time relay 21, the output of which is connected to the control input of the sawtooth 1 generator , with the power supply channels of the controlled relay 29 and inverter 3, and with the input of the pulser 22, the output of which is connected to the resetting input of the trigger 5. The input of the counting trigger 25 is connected to the output channel of the tripping signal of the sawtooth 1 generator The first output is connected to the input of the pulser 24, and the second output is connected to the second inputs of the elements AND 13 and 16 and to the inputs of the element OR 26. The output of the pulser 24 is connected to the second inputs of the elements 12 and 15 and to the input of the pulse 23 whose output is connected with the second input of the element OR 26 and with the input of the trigger 27. The output of the trigger 27 is connected to the control input of the switch 4, to the control input of the switch 2 and to the input of the inverter 28, the output of which is connected to the second control input of the switch 2. The trigger inputs of the trigger. 17, 18, 25 and 27 are connected to the input channel Stop, Direct and Inverse outputs of the trigger 5 are connected to the control inputs of the sawtooth generator 1. The output of the element OR 26 is connected to the prohibitory input of the element BANTH 20. The device. Operates as follows. When the signal "1 through the channel" Start trigger 19 takes the state "1, energizing the inverter 28, the trigger 5 and the input of the element BAN 20. The output of the inverter 20 is supplied to the control switch 2, providing the inputs of the controlled relay 29 combination input signals corresponding to the relay control according to the scheme YES. The signal "1 from the output of the BANGE 20 element through the time relay 21, which provides a time delay for the switching time of the switch, enters the sawtooth 1 generator 1 on its switching on and into the supply channel of the controlled relay 29 and inverter 3. The generator 1 generates increasing pressure on the corresponding the input of the controlled relay 29. When the operation of the controlled relay 29 is reached, the signal "1" appears on its turn, which through the switch 4 enters the input of the trigger 5, the trigger 5 is activated, on its direct output The signal "1" appears; the 6-memory cell is closed; the input pressure of the comparison element 8 is monitored by the pressure level of the monitored relay 29. In the case when the relay has operated within the specified input signal range, the signal from the forward output of the trigger 5 oscillator 1 switches in the mode of pressure reduction, and if the relay 29 did not operate, the switching is carried out inside the generator 1 when the pressure reaches the upper allowable value of the input pressure range of the relay 29. At the output of the generator 1, the pressure begins to decrease. When the level of the reverse actuation of the relay 29 reaches its outflow, the signal "O appears, on the inverting output of the trigger 5 a signal appears" 1, the memory cell 7 is closed, the level of the reverse actuation pressure of the relay 29 is stored at the second input of the accumulator 8 generator 1 switches to pressure memory mode at its output and this signal inside generator 1 forms the POTK.I cut-off signal (if the relay 29 fails to work, the shut-off signal is generated inside the sawtooth generator 1 when the pressure reaches the lower the input signal of the relay act 29). ROTCL disconnect signal. arrives at the input of the counting trigger 25, which generates the signal "1 but the first output, this signal enters the reject analyzer 9 through the pulsator 24, which forms at the input a short pulse triggering triggers 1.7 and 18 through elements 12 and 15. If the pressure difference of the controlled response the relay is greater than the value of Pj., the signal "1 is generated at the output of the Comparison element 8 and the trigger 17 is triggered through the Element 12 and the cxeiMe relay 29 is YES; if the difference is less than the RERP, then at the comparison output of the comparison element 8 l "O, at the output of the inverter - signal" 1 and through element I 15, trigger 18 is triggered, and outputting a signal through the channel "Marriage YES. After the pulse disappears at the output of the pulsator 24 and the pulsator 23 outputs a short-term pulse, which through the element OR 26 prohibits the signal "1 at the output of the element BANGE 20, the power is removed from the controlled relay 29 and from the inverter 3, the start signal 1 disappears. At the same time "1 with the pulser 23 triggers a trigger 27, the output of which is fed to the input of the inverter 28 and to the input of the switch 2, providing on the outputs, and therefore, on the inputs of the monitored relay 29, a combination of input signals corresponding to A relay according to the PE scheme, at the same time a switch 4 connects relay 29 to trigger 5 via inverter 3. When the pulse disappears at the output of the pulser 23, the ban from element 20 is removed, generator 1 is restarted, power is supplied to the controlled relay 29 and the inverter 3, and the pulser 22, with a short pulse, resets trigger 5, cells 6 and 7 open, and the circuit is ready for a new cycle, similar to that considered. At the end of the cycle, the counting trigger 25 generates a signal "1 on the second output, which enters the reject analyzer 9 and through the OR element to the prohibitory input of the BANE 20 element, this removes power from the monitored relay 29 and from inverter 3, turns off the generator 1. If the pressure difference between the operation of the relay 29 is greater than the value, then on the output of the reference element 8 the signal "1" is output; at the output of the element I 13 the signal is "1, and if trigger 17 was triggered, then at the output of element 14 on the channel "Signal appears, signal" 1, determining the validity of the relay, according to the schemes YES and NOT. If the difference is smaller, then the signal at the output of the Comparative element 8 is equal to “O, the output of the inverter 11 is“ 1, and at the output of

of element 16 on channel "Marriage does NOT appear signal" 1, preparation of the circuit for the next monitoring cycle is performed by sending signal "1 on channel" Stop, while triggers 17, 25 and 27 are triggered. with the help of the indicator 10 with remote control.

The use of the installation for monitoring pneumatic relays will allow to automatically conduct a cycle of monitoring the relay sequentially according to the schemes YES and NOT with memorizing m and summing up the results of control, which will reduce the labor costs of control operations.

Claims (2)

Invention Formula A device for monitoring pneumatic devices containing a sawtooth generator, a first inverter and a switch, the first switched input of which is connected to the input of the first inverter and to the input channel of the device, and the second switching input connected to the output of the first inverter, trigger with mutually inverse outputs, input which is connected to the output switch, and the outputs to the control inputs of the sawtooth pressure generator, memory cells, the control input of the first of which is connected to the direct output three Hera with mutually inverse outputs, the control input of the second - with the inverse output of this trigger, the inputs - with the output of the sawtooth pressure generator, the comparison element, the plus chamber of which is connected to the output of the first memory cell, the first minus - with the output of the second memory cell , the second minus - with the signal channel of the minimum allowable value of the differential, a scrap analyzer consisting of a second inverter, whose input is connected to the output of the reference element, and a remote-controlled indicator, whose inputs connect are not available with the output of the sawtooth pressure generator, with the outputs of the first and second cells of the generator and with the signal channel of the minimum allowable differential value, characterized in that, in order to expand its application area, the first and second triggers with separate inputs are expanded in it BAN, time relay, three pulsators, a counting trigger, an OR element, a third inverter and an input switchboard. And five elements are installed in the reject analyzer And two and fourth and fifth are triggers with separate inputs, and the output of the first trigger with separate inputs connected to the trigger power channels with inverse outputs and the third inverter, and to the inputs of the BANNER element whose output is connected to the time relay input, the time relay output is connected to the power channels of the monitored relay and the first inverter, with control the start input of the sawtooth generator and the input of the first pulser, the output of which is connected to the reset input of the trigger with mutually inverse outputs, the input of the counting trigger is connected to the output channel of the generator breaking signal pa, the first output of the counting trigger is connected to the input of the second pulser, and the second to the first input of the OR element, the second input of which is connected to the input of the second trigger with separate inputs and to the output of the third pulser, the input of which is connected to the output of the second pulser separate inputs connected to the control input of the switch, to the first control channel of the input switch and to the input of the third inverter, the output of which is connected to the second control channel of the input switch i.e., the inputs of which are connected to the output of the sawtooth pressure generator and the pressure supply channels of the subsurfaces, the output switches of the input signals are connected to the output channels, the first inputs of the first and second elements I are connected to the output of the adder, the first 9INVES of the third and fourth elements I are connected to the output of the second inverter, the second inputs of the first and third elements And are connected to the second output of the counting trigger, the second inputs of the second and fourth elements And are connected to the output of the second pulser, the output of the second element coagulant and connected to the input of the fourth flip-flop with separate inputs, whose output is connected to the first input of the fifth AND gate, a second input of which is connected to the output of the first AND gate, the output of the fifth AND gate connected to the output channel device. "It is valid, the output of the fourth element I is connected to the input of the fifth trigger with separate inputs, the output of which is connected to the output channel of the device" Marriage YES, the output of the third element I is connected to the outputs of the channel of the device. "The marriage is NOT, resetting the inputs of the first to the fifth trigger separate inputs and a counting trigger are connected to the input channel “Stop, and the installation input of the first trigger with separate inputs is connected to the input channel“ Start. Sources of information taken into account in the examination 1. Author's certificate-USSR No. 645024, cl. G 01 D 18/00, 1977. 2. The author's certificate. USSR p6 application number 2712266 / 18-24, cl. G 01 D 18/00, 1979 (prototype).