SU558232A1 - Device for automatic control of electrical circuits - Google Patents

Description

one

The invention relates to the field of instrumentation technology and can be used to control the correctness of installation, resistance and insulation strength of electrical circuits.

A device for automatic control of electrical circuits (1) is known, comprising a switch and a control unit.

The disadvantage of this device is the need for an individual adapter for each tested product, since the device is connected to checked my points using a rigid program (1).

Another known device contains a switch and a control unit with program setting using the reference unit (2). The drawback of the device is that it does not allow testing the resistance and durability of the insulation.

The closest technical solution to this invention is a device for automatically controlling the correctness of installation and resistance of harnesses, containing a switch and a control unit, in which each switch output is connected to one of the control response inputs through a diode and normally closed contacts of two program relays (3) .

The disadvantage of this device is a large amount of programming.

To reduce the amount of programming in the proposed device, which contains a prohibition scheme, a one-shot, a commutator connected to the polling output and control input of the control unit, each output of the commutator is connected via por.no open contacts of the first contact group of the corresponding relay switch to the first input of the response of the control unit and through the prohibition scheme to the output of the polling of the control unit, and through the contact of the program block and the switching contacts of the second contact group to the two other inputs of the response of the control unit l, and the output of the response of the control unit is simultaneously connected to the inputs of the switch and through the one-shot with the second input of the prohibition element.

The drawing shows the principal 1a diagram of the described device containing a co-switch 1 with outputs 1-1, 1-2, 1-3 ... l- (fe-l), lk, to which a test of my product 2 is connected, program block 3 with pins 3-1, 3-2, 3-3 ... 3 - (/ g-1) and 3k, control unit 4, prohibition logic element 5, one-shot 6. The switch contains a relay 7 with contacts 7- 1, 7-2, 7-3, 7-4, 7-5, 7-67 (/ g-1), 7 - (- 2), 7-k and 7-2 / g. Each output of the switch is connected through normally open contacts of the contact group of the corresponding switch and to the first input of the response A of the block is controlled through the prohibition circuit 5 to 1 out ;;, in 5 interrogation D of the control unit, and through the contacts of the programm. the second contact group of the same relay to the other two inputs of the response B and C of the control unit. The output of the response of the E control unit is a survey with 10 inputs of the switch and through a one-shot 8 with a second input of the circuit zap ;; hundred. 1 switch is made in the iUdroBoro split | K: dl. Each; / kSmlptu go;;:.: S.ot1-c-: st: g; su oli ;; pc ;;; i ;; iu ;;.;.;: about comp; c;); tel. The block montro.p irs / gstasl st of logical structure: stbo, i: oTOi; oe. i-saiiucniiocTH from the presence of signals on it ;; the offspring moves the control operations and sigiliziru-g on results of control in the cavity; act1 with Ti ioliyu. Т „J.:;: Ца 1

The presence of signals on the input response of the control unit

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ilya1,1i nr; and: p could; 1. The sign "- means the presence, and" - ogsugsgvi; with. .all 2. Signal on B1,: the course of the response E is present. Oo1kene nr: spga:; iol i :. deln

The program of the device set by the software unit. The programming consists in that, in accordance with the table ;: disconnected circuits, the contacts of the program block are closed. The device is connected to a testable product by a universal adapter cable suitable for connecting products with different circuits.

Let us consider the operation of the device by the example of monitoring a target between the control points and from the tested product, while contacts 3–3 and 3 will be closed on the program block.

After starting the device, the first relay of the switch is triggered, connecting the output of the control unit D to the point e of the tested product via the open prohibition element 5 and output 1-1 through the normally open contacts 7-1.

At the same time, the polling signal is fed to the input of answer A.

If the e-c circuit has an open circuit, the interrogation signal to the other inputs of the response B and C of the control unit is not received.

In accordance with the table, the presence of a signal only at the input of the response A of the control unit signals the presence of an open circuit in the tested circuit.

If the e-c circuit is healthy (intact), the polling signal through the monitored e-c circuit, the output

1 / i C). A uad to enter p a 1.

A one-shot of 5 ia and iipcMH, sufficient for the transition of the stepper distributor B to the next one, will close the prohibition circuit 5 and disconnect the demand signal from the response input A and the output of the switch. The stepper valve at this time will move to the next posi- tions, while Koiopo.M contacts 7-1 and 7-2 will return to their original state, and contacts 7-3 and 7-4 will switch.

After the one-shot is returned to its original state, the prohibition element 5 will open and the device is ready to check the next circuit, for example, a-a of the item being tested. If this circuit does not have an open circuit, step-by-step 11) cut it; 1 will move to the next position, in which contacts 7-3 and 7-4 return to their original state, and contacts 7-5 and 7-6

switch

11When the prohibition circuit is returned to the open state, the interrogation signal is sent to the answer input L and through normally open contact 7-5, close and contact 3-3 of program block 3, 1 life still opens contact 6-6 to the answer input C 4. If there are signals at the response inputs / 1 n C, in accordance with the table, the control unit will work out a test of the strength and resistance of the insulation.

After checking the strength and resistance of the insulation, the control unit, depending on the state of the insulation, either signals the presence of a defect or, in the normal state of isolation, gives a signal "rate of response answer E.

Further, the verification process will take place as described above.

In the presence of a false jumper, connectinush; to it a chain of in-с-е with a chain a-d, the operation of the device is as follows.

After the third relay switch is triggered, the interrogation signal is fed through the inhibitor circuit to the input of the response A and via n. pins 7-5 and switch output 1-3 in two circuits: through a closed contact 3-3, normally open contact 7-6 to the response input C and from the second circuit through contact C of the circuit L – C – e, false jumper, circuit ad, switch output i- / e, closed contact Zy, n.z. The contact 7-2 / e to the input of response B. The interrogation signal will be present at the three inputs of output A, B and C, and the control unit, in accordance with the table, will process the signal about the presence of a short circuit between the circuits, which must be separated.

To check the absence, by confusing to the device, in addition to the product being tested, a standard is connected, which repeats the scheme of the product being tested. If the circuit of the tested product coincides with the pattern of the standard, then the device operates as described above, since the signal passes through the standard and in parallel through the reference circuit.

If the circuit of the tested product differs from the standard circuit (for example, in the checked product, as a result of the error; 1, instead of the jumpers С-Ь and d-a, there are jumpers (с-а and d-b), then if the tested product is connected in parallel and

reference, both e-c-b and d-a chains appear

closed together.

In this case, the device works similarly to that described above with a false jumper.

Thus, a device with a simple kopt): a solution that allows you to carry out the necessary amount of checks for various items with a quit contact; you do not need specially designed programs on complex program carriers.

The device checks the product with 2000 controlled points.

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A device for automatic control of electrical circuits, containing a prohibition element, a voltage detector, a switch, connected to the interrogation output and inputs to the control unit, o t,; li h a 10: tse e so that, in order to reduce the amount of programming, the output of the switch is via the normally open contacts of the nerve contact group of the corresponding relay of the switch to the first input of the response of the control unit and through the zapreg element to the output of the poll block 1-: ontrol, and through the program block and the switching contacts of the second contact group to the two other inputs of the response of the control unit, the output of the response of the control unit is simultaneously connected to the inputs of the switch and through the one-shot with the second Vl Edom element zanoet.

Sources of information, taken into account at the examination:

1. Copyright SSSR USSR L9 345453, M. CL.-G OP 31/02. 03/17/69

2. Author's witness} 50 USSR 345454, M. K l .2 G О П 31 / 02.31.08.69.

3. Copyright svn;: etelstzo USSR Lo 309319, M. Kl.2 G 01R 3i / 02. 18.09.37, (prototype).

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