SU892363A1 - Device for checking pulse generators - Google Patents

Description

The invention relates to a monitoring apparatus and measuring technique and can be used, for example, for monitoring the health of pulse generator systems and alarm systems. A device for controlling pulse generators is known, comprising a group control block generating unit consisting of triggers connected in parallel to a register, a time cycle counting relay, a decryption unit and an inversion (reset) 1.. The disadvantages of the known device are complexity, due to the need for using a stabilized power source and limited functionality due to the inability to control impulse generators with an external start. The closest in technical essence to the invention is a device for controlling pulse generators, containing thyristors, interlocking blocks, reset unit, time relay, electronic key and differential circuits 2. A disadvantage of the known devices is the limited functionality due to the fact that the device does not infect Which of the controlled generators is faulty, and only reveals the fact of the unsuitability of one of the generators. The purpose of the invention is to expand the functionality of the device. The goal is achieved by the fact that a device for controlling pulse generators containing series-connected thyristors, whose cathodes are connected to the negative terminal of the network through load resistors, and the control electrodes are connected to the outputs of controlled generators, pulses, cathodes and anodes of thyristors contacts of the corresponding blocking blocks connected by inputs with: control outputs of controlled pulse generators, cathode of the last thyristor nen with reset input unit ryhod which is connected with the control;, input time switch and the electronic key, connected with the anode of the first output of the thyristor, the second input - to the positive terminal network introduced.

diodes and electromagnetic relays, the anode of each thyristor is connected to the anode of the corresponding diode, the cathode of which is connected to the first terminal of the relay coil, the second terminal of which is connected to the second terminal of the coil of the subsequent relay through its normally open contact, and the second terminal of the last relay coil via the closing relay of the time relay connected to the negative terminal of the network.

The drawing shows a functional diagram of the device.

The device contains a shaper 1 binary sign group control, including thyristors 2 1-2-p and resistors 3 t-3-p, differentiating circuits, block 5 reset, time relay b, electronic key 7, block 8 of blocking with output contact 9, diodes lO-1-lO-n, relay 11-1-11-p, with contacts 12-1-12-n closing contact 13 of relay 6, inputs 14-1-14-n of the device, terminals 15 and 16 of the direct current network , respectively, positive and negative.

The device works as follows.

When power is applied, the timer starts counting down the time 6, the key 7 is closed, while the positive potential is applied to the thyristor anode, it is possible to operate along the circuit: the positive terminal 15 of the network - the key 7, the thyristor 2-1 - the load resistor 3-1.negative terminal 16 network. When the corresponding generator is working, the pulse from its output goes through the differentiating circuit 4 1 to the control electrode of the thyristor. The latter opens, and the positive potential flows to the anode of the next thyristor, creating the possibility of its processing, etc. When the Esekh controlled generators are in good order, all the thyristors 2-1-2-p are alternately triggered, and a positive potential appears on the cathode of the thyristor 2-n, which is simultaneously the output of the binary sign of group control 1, i which generates a signal at once. closing the key: a 7 and resetting the time relay b. In this case, the key 7 breaks the supply circuit of the thyristors 2-1-2-p, they are locked. Response time:. Relay .6 is chosen to be larger than the sum of the periods of monitored pulse generators. When the latter work properly, it does not have time to turn off key 7 before all the generators are polled. The reset unit 5 can be made in the form of a standby multivibrator, the pulse duration of which is chosen sufficient to reliably reset the time relay b

by the principle of charge-capacity capacity. Upon the return of the standby multivibrator to the initial state, the key 7 closes, the relay B starts counting the time, the cycle repeats. The input of the waiting multivibrator must be equipped with a temporary selector, excluding its triggering from the pulses of the last controlled gene. the rators passing through the differentiating chain and the control electrode of the thyristor.

When one of the monitored pulse generators fails, the corresponding thyristor 2 does not trigger, a positive potential does not appear at the output of the driver 1. After the control cycle time expires, the time relay b is activated, closes its contact 13, connecting the second ends of the relay windings to the negative terminal of the network 16. This creates a power supply circuit for all the relays that are connected to the positive terminal of the network 15 through the triacs. So, for example, when a pulse generator corresponding to the thyristor fails, the latter does not work, the power after the time relay has been triggered is received only by the relay and. Thus, only one relay remains on, namely the one corresponding to the faulty pulse generator. With free contacts, the relay issues an o signal to the alarm circuit. that which generator was out of order, and the faulty pulse generator was turned off and the backup pulse generator was turned on. If the contacts of one relay 11 turn out to be insufficient, or their power does not allow to produce the necessary over-switching, additional intermittent relays connected to the power supply circuit through the relay contact or connected in parallel with the windings of these relays can be used for these purposes. Diodes 10. provide the prohibition of powering the subsequent windings of the relay 11 :: 1g11 n from the previous

A thyristor, for example, connected to a non-permanently running external-pulse generator (the circuit shown in the drawing controls one such generator), is bridged by the output contact 9 of the blocking block 8, which opens its contact when an alarm is triggered by an external generator the start (the same signal goes to the input of block 8, causing it to fire). As the block 8, the blocking key can be used, for example, a control key, if the signal triggering the generator is constant, or a time relay, if the signal triggering the generator goes from constant to pulsating.

Thus, the introduction of the diodes 10 and the llellnllan relay allows the faulty generator to be indicated, which expands the functionality of the device.

Claims (2)

1. The patent of France 2326080, cl. H 03 K 5/18, 1977. - 2. USSR inventor's certificate according to application no. 2707935 / 18-21 of C. 01 R 5 31/28, 1979 (prototype).