SU1679420A1 - Electrical wiring correctness checker - Google Patents

Abstract

The invention relates to a control and measuring technique and can be used for technological control of correct installation of harnesses, cables, printed circuit boards and switching blocks. The purpose of the invention is to improve the performance and reliability of the control due to the possibility of simultaneous control of all the output circuits of the object of control. The goal is achieved by the fact that a device containing a clock pulse generator 1, a start block 2, an AND 3 element, a poll counter 4, a poll switch 5, a status indicator 6, a reference object 9, a comparison block 10 and an indicator 11, a diode array is inserted 7, the fault indicator 12, the element NOT 13 and the corresponding connections. 1 Il.

Description

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The invention relates to a measuring and control technique and can find an application for creating

instrumentation designed for the technological control of the installation of harnesses, cables, printed circuit boards and switching blocks.

The purpose of the invention is to increase the productivity and reliability of control due to the possibility of simultaneous control of all output circuits of the object of control and the elimination of paired blocks of the same name.

The drawing shows a block diagram of the device.

The device contains a generator of 1 clock pulses (GTI) and a start block 2 connected respectively to the first and second inputs of the element 3, the output of which is connected to the interrogation counter 4, the discharge outputs of which are connected to the discharge inputs of the interrogation switch 5 and indicator 6 state (count 4 polling), and its overflow output is connected to the input of start block 2. The outputs of the interrogation switch 5 are connected to the inputs of an isolating diode array 7, the outputs of which are connected to the terminals of the tested 8 and reference 9 objects.

Comparison unit 10 is made multi-digit, consisting of n comparison elements, at the input of each of which are connected a pair of like output terminals of the tested 8 and reference 9 objects. The indicator 11 is made of multi-digit, consisting of p LEDs, each of which is connected to the same output of the comparison unit 10, and the output of the indicator 11 is connected to the malfunction indicator 12 (CHN) and to the inverter 13, the output of which is connected to the third input of the AND element 3

The device works as follows.

The initial stage of operation of the device consists in checking the health of the output circuits connected to the first input terminal of the object under test 8, in which a logical O, prohibiting the arrival of pulses from the GTI 1, is sent from the unexcited start-up unit 2 to the second input of the element 3 and 3 4 polls, regardless of the output state of the inverter 13, Poll counter 4 is in the zero state, forming a null combination on the counting inputs of the polling switch 5, while the first output of the polling switch 5 contains a logical and T, and all other outputs - logical O, C 5 polling switch outputs interrogation signals in the form of a logic 1 and the (n-1)

logical 0y are fed to the inputs of an isolating diode array 7, the diodes of which provide the interrogation signal to the input terminals of the same name tested

8 and the reference 9 objects, while isolating them from each other and from the outputs of the interrogation switch 5, prevents the occurrence of unwanted feedback. If in the object being inspected 8 among

The 0 output circuits connected to the first input terminal are faulty, then the codes simultaneously coming in parallel from the n output terminals of the tested 8 and reference 9 objects for paired

The 5 inputs n of the elements of the comparison unit 10 do not coincide and on its one or several outputs, depending on the number of faulty circuits, a logical 1 signal appears simultaneously, which

0, the corresponding channels are received by the indicator 11, which indicates the detected fault by lighting the like LEDs. corresponding to the output terminal numbers of the tested object 8. At the output of the indicator 11, in this case there is a logical G, which is converted by the inverter 13 into a logical O, coming to the third input of the And 3 element and blocking it. SNN 12,

0 included on the output of the indicator 11, when the lamp is lit or the sound is given, it indicates the presence of a malfunction, thereby serving as the primary source of information on the presence of only the fact of a malfunction in

5 of the object being checked and prompts the operator to pay attention to the LED field of the indicator 11, which indicate not only the presence of a fault, but also the location of the fault (the number of the output terminal

0 of the object being checked), which frees the operator from the need to constantly monitor the LED field and reduces its fatigue. If in the tested object 8 the output circuits connected to the first input terminal are intact, then the codes coming from the n output terminals of the tested 8 and the reference 9 objects to the paired inputs of the n elements of the comparison unit 10 coincide and are maintained at its n outputs signals

0 logical О, which are received via the corresponding channels by the indicator 11, which indicates the absence of a malfunction (the LEDs are not hot), and at its output there is a logical AO, which is converted by the inverter 13 into a logical 1, coming to the third input of the And 3 element, unlocking it from the side of the inverter 13 and completing the test cycle of the output circuits connected to the first input terminal of the object under test 8. CHN 12 V

in this case also shows the absence of a malfunction, for example, the light is off, the bell does not ring.

The test of the output circuits connected to the second output terminal of the object under test is provided by the excitation of the start-up unit 2. When the start-up unit 2 is excited, the logical 1 arrives at the input of the element 3, which allows the pulse from the GTI 1 to follow through the element 3 of the input of the count of 4 polls, switching it to the next polling position. The bit outputs of the polling counter 4 affect the bit inputs of the polling switch 5 and the status indicator 6, the logical output G appears on the second output of the polling switch 5, the logical O on the first and other outputs, and the counter status indicator 6 4 polling shows the next number of the input terminal of the inspected object 8, to which the interrogation signal is currently sent as logical 1. The polling process repeats until a malfunction is detected in the tested object 8, or until it is interrogated The p input terminals of the object under test 8 is overflowed, and the polling counter 4 is overflowed, and a logical signal 1 appears at the output of the latter, which returns the trigger unit 2 to the unexcited state. In this case, at the output of start block 2, a logical O appears, which blocks AND 3, completing the verification of the object.

Thus, the simultaneous monitoring of all output circuits of the object under test, carried out in the proposed device, when a control signal is sent to its one successive input terminal, the absence of time spent on obtaining evidence of a fault, improves the device performance, and excludes the device of paired blocks of the same name allows to increase the reliability of the control.

Claims (1)

Invention Formula A device for checking the correctness of the electrical installation, comprising a clock pulse generator, a trigger unit, an And element, a poll counter, a status indicator, a poll switch, terminals for connecting the reference and monitored objects, a comparator block and an additional indicator, with the clock pulse and trigger block outputs connected, respectively, with the first and second inputs of the AND element, the overflow output of the polling counter is connected to the input of the block the start, the bit outputs of the polling counter are connected to the corresponding bit inputs of the polling switch, characterized in that, in order to improve the performance and reliability of the control, an isolating diode matrix, an inverter and a fault presence indicator are entered into it, and the comparator unit and the additional indicator are made multi-bit, with the inverter output connected to the third input of the element I, the output of which is connected to the input of the polling counter, the bit outputs of which are connected to the bit inputs of the status indicator, n outputs of the polling switch connected to the corresponding p inputs of the isolating diode array, the first n outputs of which are connected to the corresponding input n terminals for connecting the monitored object, the second outputs with corresponding input p terminals for connecting a reference object, output p terminals for connecting a monitored object and output n terminals for connecting a reference object connected in pairs with the corresponding p first and p second inputs of the comparator unit, n outputs of which are connected with the corresponding inputs of the additional indicator, the output of which is connected to the inputs of the inverter and the fault indicator.