SU1615676A1 - Apparatus for nondestructive inspection of electromagnetic relay - Google Patents

Abstract

The invention relates to automation and can be used for non-destructive testing of the quality of assembly and adjustment of electromagnetic relays in terms of their mass production, as well as during input control. The purpose of the invention is to increase the reliability of the control. The device contains a power source 1, a switch 2, a current-voltage converter 3, differentiating elements 4.5, pulse formers 6, 7, 8, channel number 9, switch 10, generator 11, measuring channels 12, pulse counters 13, decoders 14, registration units 15 Each bend of the current curve of the monitored relay causes the switching of the counter 9. The time between the moments of the bending of the current curve is recorded in the measuring channels 12. 2 Il.

Description

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I The invention relates to automation and can be used for non-destructive quality control of the collection of cells and the adjustment of electromagnetic peaks under the conditions of their mass production from | gVA, as well as at the input control.

: The aim of the invention is to improve the reliability of contact results.

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Fig. 1 shows a device for non-destructive testing of an electromagnetic relay; Fig. 2 shows the time diagrams of the device operation for the case when the current winding current of the relay has two inflection points.

The device contains a source of 1 gitani, a switch 2, a converter 3 current - voltage, the first 4 I second 5 differentiating elements from the first to the third shaper 1; the pulses 6-8, the counter 9 are the numbers of ka- ,. switch 10, generator 11 pulses, measuring channels 12. 1 each of measuring channels 12 (there are 13 pulses on the counter, desiframer 14 and registration block 15: $ transducer 3 current flow eg - and input of the transducer 6 pulse-: s are equipped with terminals 16 and 17 for connecting winding controlled

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The device works as follows.

The winding of the monitored electromagnetic relay 18 is connected via terminals 16 and 17 to the inputs of the converter 3 current - voltage,: c to the input of the driver 6 of the pulse. In the initial state, the electrical signal from the power source 1 through: normally closed contacts of the switch 2 enters the input of the pulse generator 8, which forms the signal Resetting the counters 9 and 13. This signal provides the initial zero state of the counters 9 and 13. The signals from the output of the counter 9, the channel number to the control input of the switch 10 causes the state of the switch 10 in which none of its outputs is connected to the input to which the output of the pulse generator 11 continuously Next - vatelygast pulses. Zero signal from a normally open contact of the switch 2

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A pulse shaper-to-input driver 6 The resolution of the controlled switch 10, blocks the passage of signals from the generator 11 to one of its output bits.

When switching the switch 2 at the moment of time t (Fig. 2), the winding of the controlled relay 18 and the input of the pulse generator 6 are connected to the power supply 1. The pulse generator 6 ensures that the potential of the power source 1 is matched to the signal level. The resolution of the switch 10. The current flowing through the winding of the relay 18 begins to vary in accordance with the diagram 1 in Fig. 2. When a current is applied to the converter 3, the voltage is converted into a proportional voltage. The successively connected differentiating elements 4 and 5 carry out the double differentiation of the signal coming from the converter 3. The output signals of the differentiating elements 4 and 5 are shown in plots 2 and 3 of figure 2. At time t, which corresponds to the MONieHT of the connection of the power source 1 to the winding of the relay 18, a pulse of positive polarity arises at the output of the differentiating element 5. This impulse in the former 7 is converted into a short rectangular impulse of the level of a logical unit, which is fed to the counting input of the counter 9 of the channel number. With the arrival of this signal, counter 9 goes from zero to one. At the same time, at its outputs there appear digital signals corresponding to binary code, which are fed to the control inputs of the switch G0 and lead to switching, the input of the switch 10 with its first output. The presence of a positive signal from the imager 6 impulses at the input Resolution of the switch 10 ensures the passage of a burst from the output of the generator 11 to the counting input of the first measuring channel 12, Tie. on the counting input of the counter 13 pulses. In this case, the decoder 14 and the registration unit 15 register the current number of pulses received at the counting input of the measurement channel 12.

At time t (Fig. 2), which corresponds to the first break point of the current rbmot current curve 1

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at the output of the differentiating element - 5 a second pulse of positive polarity arises, which through the pulse shaper 7 is fed to the counting input of the counter 9 of the channel number. This changes the digital code at its outputs, which is fed to the control inputs of the switch 10 and leads to switching the input of the switch from the first to the second of its code. Thus, from time t, the pulses from the generator 11 begin to flow to the counting input of the second measuring channel 12, In this case, the registration unit 15 registers the first measuring channel 12 as a steady state of pulses connected to it via the decoder 14 of the counter 13, corresponding to the number of generator pulses 11 received during time (t (-tg) per hour An electronic input of the first measuring channel 12, the known pulse period from the generator 11, makes it possible to unambiguously determine the time ().

At time t corresponding to the second break point of the winding current of the relay 18, the output of differentiating element 5 produces a third pulse of positive polarity, which through the pulse shaper 7 enters the counting input of the channel number counter 9 and changes its state. At the same time, under the influence of control signals, the input of the switch 10 is connected to its third output. Therefore, from the moment of time tg, the pulses from the generator 1I begin to arrive at the counting input of the third measuring channel 12. The recording unit 15 of the second measuring channel 12 records the steady state electrically connected with it through the decoder 14 of the counter 13 pulses corresponding to the number of pulses of the generator 11 received time (tv-c) to the counting input of the next measuring channel 12, which allows determining the time (tj-1,). If there is no third break point of the winding current of the relay 18 (plot 1, fig 2) from the counter 13 of the third measuring channel 12, it will change until it overflows, which serves as an approach. the presence of only two break points on the current curve.

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When switch 2 returns to its original position. Signal from power source 1 via normally closed contacts of switch 2 and pulse shaper 8 is fed to buses. Resetting channel number 9 and measuring channels 12 is reset. Reel 18 is de-energized and the pulse shaper 6 disappears. , the howl signal coming from the output of the imaging unit 6 to the input of the resolution of the controlled switch 10, blocks

15 passing the signals from the generator} 1 through the switch 10, the zero state of the counter 9 of the channel number corresponds to a state of the controlled switch 10 in which

20 one of its outputs is not connected to the input.

Thus, when the switch 2 returns to its initial position, the device for controlling the electromagnetic relays 25 goes to the initial state,

In case of a large number of breakpoints of the current curve of the relay winding (plot 1, fig 2) or the absence of them, the device operates in the same way, the layer of measuring channels 12 is selected taking into account the maximum possible number of breakpoints of the current curve. In practice, the number of channels 12 does not exceed Zg 4,

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Claims (1)

Invention Formula A device for non-destructive cond roll of an electromagnetic relay containing a power source, a pulse shaper, a transducer current, voltage, first and second measuring channels, a switch and a switch, a power source through the make contact of the switch monitored relay coil, the second output of the device for connecting 50 which is connected to the input of the converter current - voltage characterized in that, in order to increase the reliability of the control, the device ystvo JJ comprises first and second differentiating elements the second and third pulse shapers, the channel number counter, the pulse generator, and additional measurement channels by the number of additional recorded break points b | a the current curve of the monitored relay, and | each measuring channel contains serially connected counts to pulses, a decoder and a relay unit, the output of the power source through a disconnecting contact of the switch connected to the input of the first pulse shaper, the output of which is connected to the reset inputs of the channel counter and pulse counters in each channel, output current transducer - voltage across sequentially connected first and second; ifferen11; iruya1 elements connected P five d shshrshshsh but IIIHIIIIIIIIIIIIIIIIIIIIIIII  b i Hshshshshsh ЛУ7 well Jb H111111111111 | FIG. 2 To the input of the second pulse generator, the output of which is connected to the summing input of the counter of the channel number, the output of which is connected to the control input of the switch, the output of which is bitwise connected to the summing inputs of the pulse counters of the respective channels, the output of the pulse generator is connected to the information input of the switch, the first output of the device to connect the winding of the controlled relay is connected to the input, the third of the pulse generator, the output of which is connected to the enable input of the switch. 11Н111111111.г