SU907471A1 - Device for detection of microswitch electric network breaks - Google Patents

Description

The invention relates to electrical measuring equipment and can be used to control microswitches.

Closest to the invention by technical essence is a device containing a displacement node, a controlled microswitch, two terminals of which through resistors and an indicator are connected to the first terminal of the current source, the second terminal of which is connected to the third terminal of the microswitch 1J.

A disadvantage of the known device is the low reliability of the control, and the performance due to the inertia of the indicator.

The purpose of the invention is to increase the productivity and reliability of the control.

The goal is achieved by the fact that in a known device containing a displacement unit, an indicator, the first and second resistors, the first terminals of which are connected respectively to the first and second terminals of the microswitch, the third terminal of which is connected to the first input terminal, the sensors are inserted , a time delay element, the second input terminal being connected to the second terminals of the first and second resistors, the first terminals of which are connected respectively to the first second inputs in parallel Trigger element's coincidence and whose output is connected to an input of a time delay element, the output of which is connected to

10 by the first input of the second and third coincidence elements, the second inputs of which are connected respectively to the first second outputs of the trigger, the third inputs are connected respectively to the first and second outputs of the second trigger, and the outputs are connected to the first inputs of the third and fourth triggers respectively, the output of which is connected to the corresponding 20 the indicator input, and the second inputs are connected to the output of the displacement mechanism and. the first input of the second trigger, the second input of which is connected to the sensor.

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The drawing shows a block diagram of the device.

The device contains a node 1 movement, sensor 2, microswitch 3, indicator 4, triggers 5 and 6, elements 7 and 8, match, element 9

thirty

The delay delay, coincidence element 10, trigger 11, resistors 12 and 13, trigger 14.

The device works as follows.

Prior to the movement of the drive element of the controlled microswitch 3, the trigger 11 is reset, the contact system of the microswitch 3, and the triggers 5, b and 14 - by the displacement unit 1. At all inputs of the element 7, logical (log) O, and two the inputs of element 8 match - log, 1.

Triggers 5 and 6 perform the functions of the memory elements of the results of monitoring the break of the electric circuit of the microswitch 3.

the microswitch 3, its drive element is moved by the movement unit 1. If the monitored microswitch 3 has an open circuit in the forward working stroke, then the output of the coincidence element 8 is a signal, and the state of the trigger b changes. As a result, indicator 4 displays information about the presence of a gap before the direct operation in a form convenient for the operator to perceive. Since during the direct triggering of the microswitch 3, the state of the trigger 11 changes earlier than the coincidence signal from the output of the coincidence element 10 arrives at the first input of the coincidence element 8, its state does not change at the output. The amount of delay determined by the time delay element 9 is equal to the maximum allowed response time of products like controlled microswitch 3. When the end position of the drive element of controlled microswitch 3 is reached, a signal is generated at the output of sensor 2, and the state of trigger 14 changes. In this case, the movement unit 1 is reversed, and the drive element of the controlled microswitch 3 moves in the opposite direction. - If the monitored microswitch 3 has an open circuit in the area of the reverse stroke, then a signal appears at the output of the coincidence element 7, and the state of the trigger 5 changes. As a result

Indicator 4 displays information about the presence of a gap before reverse operation in a form convenient for the operator to perceive. Since during the reverse triggering of microswitch 3, trigger 11 returns to its initial state earlier than the coincidence signal from the output of coincidence element 10 arrives at the first input of coincidence element 7, and its state does not change at the output.

Claims (1)

Invention Formula A device for detecting breaks in the microswitches electrical circuit, comprising a displacement unit, an indicator, first and second resistors, the first terminals of which are connected respectively to the first and second terminals of the microswitch, the third terminal of which is connected to the first input terminal, characterized in that authenticity 5, a sensor, triggers, coincidence elements, a time delay element are inserted into the device, the second input terminal is connected to the second terminals of the first and second resistors, the first terminals of which are connected respectively to the first and second outputs of the parallel-connected trigger and the coincidence element, the output of which is connected with the input of the time delay element, the output of which is connected to the first input of the second and third match elements, the second inputs of which are connected respectively to the first and second outputs 0 trigger, the third inputs are connected respectively to the first and second inputs of the second trigger, and the outputs are connected respectively to the first inputs of the third and fourth triggers, the output of which is connected to the corresponding indicator input, and the second inputs are connected to the output of the movement mechanism and the first input of the second trigger, the second input of which is connected to the sensor. Sources of information taken into account in the examination 1. Interdepartmental normal BUT. 360.015 GK, see. USSR on radio electronics, l. 43. //////////// f wm.