SU1408387A1 - Device for checking inductance of chokes - Google Patents

Abstract

The invention relates to the field of measurement technology. Device for controlling inductors of chokes contains shaper 6, generator 1 counting pulses, key 8, indicator 5, terminals 9 for connecting test throttle, current sensor 10, one-shot 7, decoder 4, coincidence unit 2, reference source 12, installation unit 13 limit, comparator 11. The device allows for tolerance control of chokes inductances. 1 hp f-ly, 1 ill.

Description

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I The invention relates to a measuring technique and can be used to control inductor chokes. I The purpose of the invention is to expand the functional capabilities of the device through the implementation of tolerance control. I The drawing shows a functional (| device for controlling inductive-chokes, i) The device contains a generator of 1 counting pulses, a coincidence element 2, a count of 3, a decoder 4, an indicator 5, a generator 6, a generator of 7 short pulses, a key 8, the investigated choke 9, the sensor 10 current comparator 11, the source 12 of the reference

Apr, block 13 set limit. Generator output 1 counting pulses

Connected to one of the inputs of coincidence element 2, the output of which is connected to the counting input of counter 3, the connected decoder 4 connected to the indicator fjoM 5.

The other input of the coincidence element 2 is connected to the output of the imager 6 connected to the input of the short pulse generator 7 and the key 8 whose output is connected to the measured choke 9 connected to the current sensor 10 from one of the comparator 11 inputs to another the input of which is connected to the source 12 of the reference voltage. E | Comparator I output is connected to the disconnecting input of the imaging unit 6, and the generator output 7 of short pulses is connected to the R input of counter 3. Control, and inputs of the encoder 4 are connected to the limit setting unit 13.

The device works as follows. The shaper 6 generates a control pulse of positive polarity, the second one starts the generator 7 short and | pulses. The generator 7 generates an impulse that sets the counter 3 to the initial state.

I The control pulse from the imaging unit 6 acts on the element 2 coincidence, allows the counting pulses generated by the generator 1 counting pulses to pass to, the counter 3, and also opens to the switch 8 and through the throttle 9 and the sensor 10 tof begins to leak current. The speed of the current on the sensor 10 is directly proportional to the value of the inductance controlled by the MJoro throttle 9. When the current on the sensor 10 reaches a value at which the signal at T1 () input of the comparator 11 becomes the large reference signal at the inverse input and the output the comparator 11, a signal is generated; it turns off the control pulse from the driver 6. The key 8 is closed, elec

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ment 2 of the match prohibits the passage of counting pulses and counter 3 stops counting. The signal at the output of the counter is converted by the decoder 4, and the signal at its output is obtained corresponding to the number of counting pulses counted by counter 3 during operation 8. Depending on the value of controlled choke 9 by the limit setting unit 13, for example, a switch, signals are generated to the control inputs of the decipher multiplexer . The condition of the decryptor is monitored by indicator 5.

The device allows the pre-start control of chokes inductances. To do this, it is necessary to connect the output of the decoder 4 to one of the inputs of the coincidence element 2. In this case, as soon as the number of counting pulses on the counter 3 reaches the value corresponding to the permissible inductance, a signal appears at the output of the coincidence element, which prohibits further counting by the counter 3 and acts on the indicator 5.

Claims (2)

1. A device for controlling inductors of chokes, containing a driver, a generator of counting pulses, a key, an indicator, terminals for connecting the test chokes, characterized in that, in order to expand its functionality, a current sensor, a single-oscillator, a descrambler, a coincidence unit , the source of the reference voltage, the limit setting unit, a comparator, one input of which is connected to the source of the reference voltage, another - to the output of the current sensor, the input of the decoder is connected to the output of the counter, and the output to the indicator one of the inputs of the coincidence unit, the other inputs of which are connected to the outputs of the generator of counting pulses and the former, the input of which is connected to the output of the comparator, one of the terminals for connecting the tested choke is connected to the input of the sensor, and the rotator and the one-shot input, the output of which is connected to the counter reset input, the outputs of the limit setting unit are connected with decoder control inputs 2. The device according to claim 1, wherein the decipher contains two multiplexers and a match element, wherein the inputs of the multiplexers are connected to the inputs of the decryptor, the control inputs are from the control inputs of the decipher, and the outputs are from the inputs of the match element whose output is connected to the output of the descrambler. 0 five 0 five