SU1293674A2 - Device for determining conductor number in harness - Google Patents

Abstract

The invention can be used to identify individual wires of the harnesses and cables and is an additional invention to the USSR author's certificate No. 1166024. The purpose of the invention is to expand the functionality of the device and increase the reliability of the control. The device includes a pulse generator 1, prohibition block 2, pulse counters 3 and 7, memory block 4, decoders 5 and 8, indication block 6, probe 10, amplifier 11, RS flip-flop 12 and pulse shaper 13. The introduction of the D-flip-flop 14, the memory element 15 and the indicator 9 makes it possible to detect short circuits between the wires and to eliminate the spurious identification of the wire number in the event of a short circuit between the wires. yu soo O) “4 m

Description

The invention relates to instrumentation engineering and can be used to identify individual wires of wiring harnesses and cables, and is in addition to the author. 1166024.

The purpose of the invention is to expand the functionality of the device and increase the reliability of control, respectively, by detecting a short circuit between the wires and eliminating the false identification of the wire number in the event of a short circuit between the wires.

The drawing shows a diagram of the proposed device.

The device contains a pulse generator 1, a prohibition block 2, a first pulse counter 3, a memory block 4, a first decoder 5, an indication block 6, a second pulse counter 7, a second devshfrator 8, an indicator 9, for example an LED, a probe 10, an amplifier 11, RS flip-flop 12, shaper 13 pulses, D-flip-flop 14, memory element 15, for example D-flip-flop.

The drawing also shows the monitored harness 16 and its wires 17.1-17. Ha.

As a D-flip-flop 14 and a memory element 15, 155 TM2 chips can be used. ,

The pulse generator 1 is connected to the first input of the prohibition unit 2, the output of which is connected to the counting input of the first counter of 3 pulses. The first decoder 5 is connected to the output of the input of the display unit 6. The p-2 outputs of the second decoder 8 are connected to the corresponding terminals for connecting the inputs of wires 17.1-17.t (wn-2) of the harness 16, one of the terminals for connecting the outputs of which is connected to the first terminal of the probe 10, the second terminal of which is connected to the amplifier input 11. The output of the first counter 3 Pulses is connected to the first input of the memory block 4, the output of which is connected to the input of the first decoder 5, and the second input - to the output of the driver 13 pulses, the input of which is connected to the n-1 output of the second decoder 8, nth the output of which is connected to the installation the input of the first pulse counter 3 and S-input; RS-flip-flop 12, the R-input of which is connected to the output

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amplifier 11, and the output is connected to the second input of the start-up unit 2 connected by the first input to the input of the second pulse counter 7, the output of which is connected to the input of the second decoder 8. The output of the amplifier 11 is connected to the C input of the D flip-flop 14, whose D input connected to the output of the RS flip-flop 12, R-input to the S-vhrddy RS-flip-flop 12, the output to the first input of the memory element 15 connected by the second input to the output of the driver 13 pulses, and the output to the input of the indicator 9.

The device works as follows.

In the initial state, trigger 12 outputs an enabling potential to block 2 of the prohibition. The generator 1 generates counting pulses, which are received through block 2 of the prohibition on the counting input of counter 3 and on the counting input of counter 7. Both counters 3 and 7 form a sequence of binary-decimal codes at the outputs. From the output of counter 7, the sequence of binary-decimal codes is fed to the input of the decoder 8. The latter converts the binary-decimal code of counter 7 to the unitary code and supplies it to the known ones; the inputs of the wires 17.1-17.t controlled harness 16 obsegaya level O.

The operator connects the probe 10 to the output of one of the wires 17.1 of the harness 16. When a signal appears on the probe 10, the amplifier 11 amplifies it and transmits to the R input of the trigger 12 and the C input of the trigger 14, but since this trigger is blocked at input D, its state is confirmed and it retains its original state.

The trigger 12 switches and supplies a signal to the input of the prohibition unit 2 and to t; D-INPUT trigger 14 and unlock the last one. The prohibition unit 2, in the presence of a prohibitory signal from trigger 12, stops the transmission of pulses from generator 1 to counter 3. The number of pulses counted by counter 3 corresponds to the number of the wire to be detected. Counter 7 continues to count pulses from the generator 1. At the same time, the signal O continues to sequentially round the outputs of the decoder 8.

If there is no closure of the wires 17.1-17.t of the harness 16, the signal O from n-1 output of the decoder 8, pos0

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A pulse arrives at the input of the imaging unit 13, a clock pulse appears at the output of the latter, which is fed to the input of memory block 4 and to the input of memory element 15. The memory unit 4 at the same time memorizes the wire number presented in the binary-decimal code, received at its input from the output of the counter 3, before the arrival of the next clock pulse. From the output of memory block 4, the binary-decimal code enters the decoder 5 and is converted into a code necessary for the display unit 6, which indicates the number of the harness wire 16 connected to the probe 10. When the O signal arrives at the nth output the decoder 8, and therefore, at the second input of the counter 3, at the S input of trigger 12 and at the R input of trigger 14, trigger 12 and trigger 14 are reset, and counter 3 is reset. When trigger 12 returns to its original state, the inhibit signal is removed from its output. In this case, the trigger 14 is blocked, and the prohibition block 2 allows the transmission of pulses from the generator 1 to the counter 3.

If there is a short circuit between the tested wire 17.1 and other wires of the harness 16 at the input of the amplifier 11, even before signals appear at the n-1st and nth outputs of the decoder 8 at least the O level appears again. In this case amplifier 11 outputs another control signal that is supplied

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Determine the wire number. A spurious identification of the wire number by a lime device can occur due to a short circuit between the wires in the harness 16. At the same time, a known device displays the number of the first connection point to the terminals of the harness wires interconnected when the probe 10 is connected to any of the closed wires. The short circuit indication allows you to determine that the device has determined the false wire number in the harness 16 In order to continue further testing of the harness 16, it is necessary to eliminate the short circuit.

After that, the device produces a second cycle of determining the number of the same wire connected by the operator to the probe 10. After the second cycle of determining the number of the wire, the third cycle goes, and so on. until the operator disconnects the probe 10 from the wire, making sure that there is no short circuit between the wire to be checked and the other wires of the harness 16 and the number of the product being checked after the high-cycle automatic check.

When the operator connects the probe to another wire, the device without any switching from the side of the radiator will determine its number and check for a short circuit.

Thus, by introducing the trigger 14, the memory element and the indicator 9 into the device, it provides for the determination of the harness wire number with

on the C input of the trigger 14, which to this is the simultaneous detection of the presence

Th time is already unlocked, since trigger 12 has already worked. Trigger 14 is switched.

The memory element 15, when a clock pulse arrives at its input from the imaging unit 13, records information arriving at its input from the trigger 14 before the next clock pulse arrives. From the output of the element 15, information is fed to the input of the indicator 9, which indicates the presence of a short circuit between the tested wire 17.1 and the other wires of the harness 16.

Detection of a short circuit between the test wire 17.1 and the other wires of the harness 16 is necessary to ensure reliable detection.

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Determine the wire number. A false identification of the wire number by a lime device can occur due to a short circuit between the wires in the harness 16. At the same time, the known device displays the number of the first one at the connection point to the terminals of the wires 16 closed between each other when the probe 10 is connected to any of the closed wires. The indication of the presence of a short circuit makes it possible to determine that the device has determined the false wire number in the harness 16. In order to continue further testing the harness 16, it is necessary to eliminate the short circuit.

After that, the device performs a second cycle of determining the number of the same wire connected by the operator to the probe 10. After the second cycle of determining the number of the wire, there is a third cycle, and so on. until the operator disconnects the probe 10 from the wire, making sure that there is no short circuit between the wire being tested and the other wires of the harness 16, and that the number of the wire being tested is reliable after a high-cycle automatic check.

When the operator connects the probe 10 to another wire, the device will determine its number and check for the presence of a short circuit without any switching from the operator.

Thus, by introducing the trigger 14, the memory element 15 and the indicator 9 into the device, it is possible to determine the harness wire number with

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short circuit between the wires in the harness. This makes it possible to obtain a reliable wire number of the harness 16 for eliminating the influence of a short circuit on the determination result.

Claims (1)

Invention Formula A device for determining the wire number of the harness by bus No. 1166024, characterized in that, in order to expand the functionality of the device and increase the reliability of control, respectively, by detecting a short circuit between the wires and eliminating the false determination of the wire number in case of a short circuit 512936746 neither between the wires, the S-input of the RS flip-flop, the output — the D-flip-flop, the memory element and the memory input of the memory element are inputted, the indicator is connected, and the D-flip-flop input is the second input with the output of the - connected to the output of the gain, D-input - the pulse changer, and the output - with s to the RS-flip-flop output, R-input - with the 5th indicator input.