SU974303A1 - Device for checking diode relay circuits - Google Patents

Description

The image refers to electrical measuring equipment and can be used to control switching equipment circuits, in which the windings of the perineo-Contact elements are diodes-bounded, and their connection circuits contain connecting diodes.

A device for testing diode circuits is known, which contains electronic switches, ring switches, blocks, matches and controls. In this device, the control of the diode connection diagrams is carried out after passing through the diode under test in the test object of a signal of a certain polarity 1J.

However, if the diode being tested is turned on parallel to the relay coil, then the signal of both polarities will pass through such a circuit unhindered.

Thus, & that device is unsuitable for controlling circuits in which iodine is connected in parallel with the relay winding.

The closest in technical essence to the present invention is a device for monitoring the reliability of ohmic contacts of semiconductor diodes, comprising a pulse generator, two matching devices, a trigger, a pulse separation device, and a display unit. This device controls the ohmic contact and the operability of the diode under test by registering on the trigger the fact that a test pulse passes or fails through the diode 2 being tested.

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A disadvantage of this device is the inability to test circuits containing simultaneously shunt and decoupling diodes.

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The purpose of the invention is to expand the functionality of the device by providing verification of diode-relay circuits containing counter-enabled shunting and isolating diodes.

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Claims (2)

The goal is achieved in that a device for checking diode-burdock circuits containing a pulse generator, a matching unit, the first and second terminals of which are connected to Terminal 1 of the 1MI terminals for connecting the test object (pulse separation shock, the first and second terminals of which are connected respectively to the third output of the matching unit and the common bus, the output of the pulse separation unit is connected via the first trigger with the corresponding inputs of the display unit, the current fixing unit and the second trigger are inserted, the pulse generator is connected to The third output of the unit is consistent, the first and second outputs of the current fixing unit are connected respectively to the fourth output of the BFHiffl unit and the common bus, the output of the current fixing unit through the second trigger is connected to the corresponding inputs of the unsupported unit. contains block 1 matching) P1, generator 2 pulses, block 3 of pulses separation, first trigger 4, block 5 pulsing, block 6 fixing current, second trigger 7. The work is based on the fact that during the passage of a current pulse through Control object 8, which contains relays and diodes, detects the fact that a specified current pulse passes through a controlled circuit and the occurrence of self-induction DDS in the presence of a shunt diode. The device works as follows. The pulse generator 2 gives a current pulse,. which passes in the case of the integrity of the relay operation circuit, through the matching unit 1 and the current fixing unit 6. The second trigger 7 is switched and the display unit 5 fixes the integrity of the relay actuation circuit and the correct switching on of the isolating diode. If there is no shunt-diode installed in the control object, or at the end of the impulse of the relay, a self-induced EMF impulse of the opposite polarity of the pulses is generated. The indicated pulse passes through the bl-3 separation pulses and switches the first trigger 4, as a result of which the indication block 5 detects the absence or improper activation of the shunt diode. If the shunt diode is turned on correctly, the self-induced EMF pulse is absent, and the first trigger 4 will not work. The display unit 5, depending on the state of the triggers 7 and 4, fixes three control results: there is no chain, valid and defective. The proposed device makes it possible to carry out a complete check of diode-relay circuits in one test cycle, containing both diodes that connect and wind bypass the relay. Claims An apparatus for testing diode-relay circuits comprising an impulse generator, a matching unit, the first and second terminals of which are connected to terminals for connecting a test object, a pulse separation unit, the first and second terminals of which are connected respectively to the third terminal of the matching unit and the common bus , the output of the separation unit (pulses) is connected via the first trigger with the corresponding inputs of the display unit, characterized in that, in order to extend the functionality by checking the diode On-circuit circuits containing colliding shunt and disconnecting diodes, a current clamping unit and a second trigger are inserted into the device, the pulse generator is connected to the third output of the matching unit, the first and second outputs of the current fixing unit are connected to the fourth output of the matching unit and the common bus, and the output of the block fixing current through the second trigger is connected to the corresponding inputs of the block, display. Sources of information taken into account in the examination 1. USSR author's certificate number 526832, cl. Q 01 R 31/28, 1976. 2. USSR author's certificate number 673940, cl. q 01 R 31/26, 1978 (prototype).