SU1429091A2 - Device for checking the parameters of opening of contacts of electromagnet relay - Google Patents

Abstract

The invention relates to a measuring technique and can be used to control the parameters of a solution of contacts of electromagnetic relays during production and during adjustment work. The purpose of the invention is to increase the accuracy and performance of the control. Two parabolic mirrors 5 and 6 are introduced into the device, the first mirror 5 being located in front of the intercontact gap of the relay and changing the angular scanning of the intercontact gap with optical radiation for scanning. Plane-parallel movement of the beam reduces the accuracy requirements for the installation of an electromagnetic relay relative to optical elements of the device. The second mirror 6 converts the plane-parallel movement of the beam passing through the contact gap into an angular one, which makes it possible to increase the accuracy and sensitivity of the device. The invention can also be used in other areas of technology and in the measurement of small gaps and displacements. 3 il. from "9 (L

Description

four

ND

WITH

about with

MS)

I The invention relates to a measuring technique, can be used to control the parameters of the contact resolution of electromagnetic relays in the course of their production and (in the course of adjustment work H is an improvement of the device according to the author, St. No. 1226418.

The purpose of the invention is to improve the accuracy and performance of the control.

FIG. 1 shows a diagram of the device; in fig. 2 is a control block diagram; figure 3 - timing charts | operation of the device ..

The device consists of a light source 1 of an electro-optical deflector 2 of the control unit 3, a diaphragm 4 / two parabolic mirrors 5 and 6, a raster screen 7, a photodetector 8 consisting of frosted glass 9 and a photosensitive element 10, a recording unit 11, a voltage source 12, controlled electromagnetic relay 13 with contacts 14 and winding 15, master oscillator 1b, electronic key 17, power amplifiers 18, reference voltage source 19, comparator 20, I 21 two-input element with direct and inverse inputs waiting for multi a vibrator 22 and a pulse former 23;

The device works as follows

In order to control the electromagnetic relay 13 is installed between two parabolic mirrors 5 and 6 so that the optical axis of the device passes between its contacts, and the plane of contact movement is located in the scanning plane of the electro-optical deflector 2. When energized, a light source 1 creates the light beam, the Control Unit 3, produces a periodic pulsed electrical signal, the period of which is an order of magnitude shorter than the response time of the controlled relay 13. The leading edge of the pulse is iodic pulse signal from the output of control unit 3 provides scanning with an electro-optical deflector 2 and a parabolic mirror 5 of the light beam from the lower to the upper limit of the solution of contacts 14 of relay 13. Parabolic mirror 5 converts the angular scanning of the light beam in the contact space into a plane-parallel scan

five

0

five

0

five

0

five

0

five

the At the same time, the installation of the relay 13 on the axes X and Y relative to the deflector 2 and the raster screen 7 is not required, which improves the control performance. A light beam passing between contacts 14 falls on a parabolic mirror 6, which transforms the plane-parallel movement of the light beam into angular movement. By selecting the curvature of the mirror 6, it is possible to obtain an increase in the angular displacement of the light beam along the surface of the raster screen 7, which improves the measurement accuracy .. The light beam reflected from the parabolic mirror 6 successively illuminates one of the end surfaces of the optical fibers of the raster screen 7, Thus, the passage in the solution of contacts 14 and Reflected from the surface of the parabolic mirror 6, the light beam enters through the raster screen 7 and the frosted glass 9 on the photosensitive element 10, which imparts electric pulses, the number of Which corresponds to the number of consecutively lit optical fibers. These pulses arrive at the registration block 11, which results in the control. The limits of the stroke of the light beam is limited by the aperture 4.

From the output of the control unit 3, the supply voltage through the first output of the device to the winding 15 of the monitored electromagnetic relay 13 is applied to the front edge of the first pulse, and the contacts 14 begin to move. Subsequent pulses of the control unit 3 provide a multiple measurement of the contact distance during the operation of the relay 13 of the specified sequence. When the contacts 14 are closed, the load voltage from the voltage source 12 through the first output of the device enters the input of the control unit 3, which stops the electrical signal to the electro-optical deflector 2. The measurement cycle is over. A change in the intercontact distance during the operation of the relay leads to a change in the number of illuminated fibers of the raster screen 7, which causes a change in the number of pulses produced by the photosensitive element 8. The change in the number of pulses determines the magnitude of the stroke, speed and acceleration of the contacts of the electromagnetic relay.

The control unit 3 coordinates the operation of the parts of the Device and works as follows.

The master oscillator 16 generates a periodic pulsed electric sawtooth signal, which, having passed through the electronic key 17, is amplified in the power amplifier 18 and is fed to the second output of the control unit 3. At the same time, the electrical signal from the master oscillator 16 is fed to the comparator 20, leading to the leading edge This signal is a short pulse with a voltage level of source 19 of the reference voltage, from the output of the comparator

20 pulses arrive at the direct input of the element I 21, to the inverse input of which from the input of the control unit 3 until the relay 13 triggers, a zero signal arrives, From the output of the element I

21 logical 1 triggers a standby multivibrator 22, generating a periodic signal with a period longer than the pulse electric signal from the master oscillator 16. This signal is generated in the pulse shaper 23 and is fed to the first output from control unit 3. After the relay 13 trips from the input of the control unit 3, the electrical signal simultaneously enters the electric switch 17, turns off

2nd run

t L

driving master oscillator 16 from the output of control unit 3, and the inverted input of element 21, the output of which a logical O signal appears, which leads to a breakdown of the impulse of the waiting multivibrator 22 and, therefore, the signal termination at the output of control unit 3.

The technical and economic effect of the invention lies in the fact that the proposed device makes it possible to determine the parameters of the solution with increased accuracy and productivity. contacts both in statics and in the process of operation of the monitored relay.

Claims (1)

Invention Formula A device for monitoring the parameters of a contact solution of an electromagnetic relay according to ant, ev, no. 1226418, characterized in that, in order to increase the accuracy and performance of the control, two parabolic hubs are inserted in it, said mirrors are located between the diaphragm and the raster screen and are optically coupled, moreover, the first mirror is installed with a concave surface towards the diaphragm and the second mirror, and the second mirror is installed with a convex surface towards the first mirror and raster screen. 9 (2.3