SU1444824A1 - Device for inspecting electric wiring - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used for technological control of the installation of electrical cables, harnesses and blocks. The purpose of the invention is to reduce hardware costs. The goal is achieved in that a device containing a keyboard, two counters, five flip-flops, seven AND elements, two OR elements, a NOT element, a clock pulse generator, a decoder, a group of voltage repeaters, two display units and a multiplexer are entered. three elements OR, a single pulse generator (GOI) and a pulse distributor. In the Mounting control mode, the logical 1 is installed alternately at the outputs of the decoder and searches for it across all the multiplexer inputs. If the circuit is found, the content of the second counter indicates its number. If there is no circuit, a trap is indicated. If there is a logical 1, a short circuit is fixed at two or more inputs. The unmounted cable ends are installed in a contact device with marked contacts corresponding to the multiplexer inputs. In rezma Chain Control, automatic control of mounted cables is realized. The comparison circuit compares the contents of the first and second counters. According to the results of the comparison, the serviceability of the cable is determined, 2 Il. | SL 4i) i 4:00 U f.

Description

The invention relates to automation and computing and can be used for technological control of the installation of electrical units, wiring harnesses and cables.

The aim of the invention is to reduce the hardware cost of the device.

FIG. 1 is a block diagram of the device; in fig. 2 - time diagrams of his work

The device contains (FIG. 1) keyboard 1, the first element OR 2, the generator 3 of a single pulse, the generator 4 clock pulses, the distributor 5 pulses, the first trigger 6, the first element And 7, the first counter 8, the first display unit 9 , decoder 10, voltage follower group 11 connected to object 12 of control, third trigger 13, third element OR 14. five and a quarter triggers 15 and 16, sixth element AND 17, second counter 18, multiplexer 19, fifth and third elements And 20 and 21, the element .NE..22, the second element OR 23, the third counter 24, the second trigger 25, seven my element is AND 26, the fifth and fourth elements of the IPI 27 and 28, the comparison circuit 29, the fourth and second elements And 30 and 31, the second display unit 32.

FIG. 2 shows time diagrams of voltages at the outputs: 33 - clock pulse generator 4, 34 - pulse distributor 5, 35 - keyboard start release 1.36 - single pulse generator 3, 37 - counter 8, 38 - trigger 13, 39 - counter 18 , 40 - element And 20 in case of detection of the circuit, 41 - trigger 6.

The device works as follows.

There are two possible modes of device operation: installation control and circuit control. Installation control mode is used in the case when one of the ends of the cable, harness is attached to the connector and it is necessary to determine the place of the second non-soldered cable chains. In this case, the connected end of the cable is connected to the output connector connected to voltage repeaters 11, and the circuits of the unconnected cable end are connected in random order to the contact device connected to the multiplexer 19 inputs, by pressing the Reset key on the keyboard 1 the device is reset. When on

5 0 5 o

Q

with

five

0

pressing the Start key a logical 1 signal from the keyboard start output

I passes through the element OR 2 to the input of the generator 3. The output of the keyboard mode 1 while O. Generator

4 generates rectangular pulses, of which the distributor 5 forms two time-shifted synchromes SI 1 and SI 2. In the initial state, trigger 6 is in state 1, therefore a coincidence occurs at the inputs of the element 7, the signal from the output of which goes to input +1 counter 8, the state of which is indicated by block 9.

The outputs of counter 8 control the inputs of the decoder 10, at the first output of which signal 1 appears, the outputs of the decoder 10 through repeaters

I1 are connected to the inputs of object 12 tsontrol (cable, harness). Voltage repeaters 11 are necessary to increase the load capacity of the decoder 10 and to isolate its outputs with the object 12 controls. On the falling edge of the pulse from the generator 3, the trigger 6 is set to the state O. Simultaneously, the pulse from the generator 3 sets the state 1 to the trigger 13 and, via the OR 14 element, triggers the 15 and 16 triggers. The SR 2 and 1 clock pulses to the element 13 And 17, a coincidence occurs, and pulses are fed to the inputs 4-1 of the counter 18. The outputs of the counter 18 are connected to the address inputs of the multiplexer 19, which alternately connects the outputs of the object 12 of the control to the code of the multiplexer 19. A search begins for the circuit, the output of which has signal 1. When such a circuit is found, a coincidence will occur at the inputs of the And 20, and the signal from its output goes to the input of element 21, at the other input of which there is 1 from the element 22. At the same time, 1 is added to the counter 24. The pulse from the element OR 23 sets the trigger 13 to 0. The passage of pulses from the element 17 to the counter 18 is stopped, the circuit number of the contact device is indicated. This circuit is soldered to the first pin of the connector, which must be open at the second end of the cable. Next, the Start key is pressed again. It is necessary to check if there is no closure with other circuits. At the same time, t, k, the trigger 13 in the state O, from the output of the generator 3, the pulse does not pass to the input +1 of the counter 8, keeping 1 at the first output of the decoder 10. The pulse from the output of the generator 3 sets to 1 the trigger 13 and through the OR element 14 resets triggers 15 and 16.

Pulses are fed to the input of counter 18, and using multiplexer 19, it is determined whether there are more circuits that are connected to the first output of voltage followers 11. If such a circuit is detected at the output of multiplexer 19 in increments of 1, the trigger 13 will be reset and the second will be added +1 into counter 24. Counter 24 is two-digit, so 1 appears at its output and trigger 25 is set to 1, indicating a short circuit. With

Circuit Monitoring mode uses 5 seconds to monitor mounted cables. For this, the device also has a connector that is connected in parallel with a contact device. Therefore, one end of the cable is connected to the outputs of 10 repeaters 11, and the other to the inputs of the multiplexer 19. The devices are transferred to this mode by pressing the hold key with the corresponding button. Signal mode 1 output appears. Key 1 is pressed. The Reset key is pressed and the running state is entered. The Start button starts up the generator 3, and +1 is added to the counter 8. Simultaneously set to 1 trigger 13 and +1 is added to the counter 18. Comparison diagram 29 compares the contents of counters 8 and 18. When compared, at its output O and

this also indicates the contents of the counter 18, indicating a circuit in which 25, in the presence of a circuit, a short circuit occurred at the inputs of the element. When from AND 30 a coincidence does not occur, the short circuit triggered multi-ger 25 is not set to 1. This plexer 19 interrogates all circuits, says that the circuit is connected to and overflow of counter 18 and the first pins of both connectors is coming. from its output overflow thru 30 cables. Multiplexer 19 continues cutting the element OR 23 establishes a triple poll of the remaining circuits. If signal

ger

13 in O, and the trigger 6 in 1. will be found, when the contents of the counters 8 and 18 are not equal, then a coincidence occurs at the inputs of element 35 And 30, the trigger 25 is set to 1, indicating a short circuit. From the output of the element AND 30 through the element OR 23, the trigger 13 is set to O. (The contents of the counter 18 indicate

The next time the Start key is pressed, +1 is added to counter 8, signal 1 is set at the second output of decoder 10, and the above-described process repeats. When the circuit is located, the trigger signal from the output of the element And 20 is set to the state O, and in the initial state at its output 1. Therefore, when the signal from the overflow output of the counter 18 arrives at the inputs of the element 26, a coincidence does not occur and the trigger

20 state 1 trigger

4824,

COP OR 28 - at 6.

Circuit Monitoring mode uses 5 seconds to monitor the mounted cables. For this, the device also has a connector connected in parallel with the contact device. Therefore, one end of the cable is connected to the outputs of the repeaters 11, and the other to the inputs of the multiplexer 19. The device is switched to this mode by pressing the corresponding button with latching. The output of keyboard mode 1 appears; Signal 1. Press the Reset button. The device is reset. The Start button starts the generator 3, and +1 is added to the counter 8. Simultaneously set to 1 trigger 13 and +1 is added to the counter 18. Comparison diagram 29 compares the contents of counters 8 and 18. When compared, at its output O and

15

25 in the presence of a circuit, at the inputs of the element And 30, a coincidence does not occur, the trigger 25 is not set to 1. This indicates that the circuit is connected to the first pins of both connectors 30 of the cable. Multiplexer 19 continues to poll the remaining circuits. If signal

0

1 will be found, when the contents of the counters 8 and 18 are not equal, then a coincidence will occur at the inputs of element 35 and 30, the trigger 25 will be set to 1, indicating a short circuit. From the output of the element AND 30 through the element OR 23, the trigger 13 is set to O. (The contents of the counter 18 indicate

circuit with which the closure occurred. An open circuit is defined in the same way as in the installation control mode. If there is no short circuit, then the signal from the overflow output of the counter 18 is

ger 15 is not set to state 45; element 31 is started by generator 1. If the circuit is not found, then the trigger 16 will be in state 1 and the signal from the overflow output of counter 18 will trigger 15 and indicate that the circuit has been broken. 50 The next press of the Start key allows you to select another series circuit, etc.

Timing diagrams (Fig. 2) for ccqd survey of all the circuits of the multi-gg operation of the device. By impulses

33 from the generator 4, the valve 5 generates two clock pulses 34. When you press the Start key, the signal 35 appears at the exit of the keyboard 1.

By the type 19 multiplexer, the signal from the overflow output of the counter 18 through the OR element 27 sets the state 24 to the state 24 and the trigger 25, and the electrolyte 3. The second circuit is monitored, etc. Thus, the Circuit Control mode is automatic, and the Assembly Control mode is semi-automatic. Block 32 indicates the state of the counter 18 on seven-segment indicators, and the trigger 25 and 15 on the LEDs.

The generator 3 has a single pulse 36, to which the addition of +1 to counter 8 (pulse 37) occurs. At the same time, it is set to 1 trigger 13 (pulse 38) and counter 18 (pulse 39) starts operating in counting mode. When a circuit is located at the output of element 20, a signal 40 appears, by which a trigger 13 is dumped to the keyboard reset output and trigger 13 is sent. With the falling edge of the pulse from generator 3, trigger 6 is set to O (signal 41). Timing diagrams are shown for the installation control mode.

Claims (1)

The invention The device for controlling electrical installation, containing a keyboard, two counters, two display units, a decoder, the input of which is connected to the output of the first counter, the input of the first display unit and the first input of the comparison circuit, the second input of which is connected to the information output 35 the second counter and the first input of the 25th input of the sixth AND element, the second indication input, five triggers, two OR elements, seven AND elements, a clock generator, a multiplexer, the group of information inputs of which is a group of inputs to the group of outputs of the control object, and a group of voltage followers, the group of which is connected to the group of outputs of the decoder, and the group of outputs is a group of outputs of the device for connection to the group of inputs of the control object, the counting input of the first the counter is connected to the output of the first element AND, the first input connected to the output of the first trigger, the first input of the first element OR is connected to the output of the second element AND, the first input of the second element SH is connected to the output of the third element AND, the first input of which is connected through the element NOT to per; the output inputs of the second and fourth elements And and the output of the keyboard mode, the reset output connected to the reset inputs of the first and second counters, the output of the fourth element And connected to the information input of the second trigger, characterized by that. I5 50 and the output of which is connected respectively to the output of the third trigger and the counting input of the second counter, the information output of which is connected to the control input of the multiplexer, the output connected to the second input of the fifth element And, the second input of which is connected to the second output of the pulse distributor and the clock input of the single generator pulse, the second input of the second element And is connected to the transfer output of the second counter, the second input of the second element SHS to i the first input of the seventh element And, the second input and output of which first connected respectively to the output of the fourth trigger and the setup input of the fifth trigger, reset inputs connected to the output of the third SHS element, the reset input of the third trigger is connected to the outputs of the second OR element, the third and fourth inputs of which are; It is connected respectively to the outputs of the fourth element And the fifth trigger, the output of the comparison circuit is connected to the third input of the fourth element And, the second and third inputs of the second display unit are connected respectively to the output of the fifth and second triggers, the installation input of the fourth trigger is connected to the output of the fifth element I, the output of the fifth element SHS is connected to the input of the third counter. that, in order to reduce the hardware costs of the device, a third counter, a pulse distributor, a single pulse generator and three SHS elements are inserted into it, the keyboard start output is connected to the second input the first element OR connected to the permitting input of the generator of a single pulse, the output of which is connected to the second input of the first element AND, the synchronous input of the first trigger, the installation input of the third “trigger” and the first input of the third element OR, the second input connected to the fourth and fifth OR elements, the second inputs of which are connected to the transfer output of the second counter, and the outputs connected respectively to the installation input of the first trigger and the synchronous input of the second trigger, the installation input otorrhea connected to the output of the third counter, counting input connected to the output of the fifth AND gate, the second inputs of the third and fourth AND gates, the output of the pulse generator is connected to the input of the pulse distributor, a first input connected to the first five 5 input of the sixth element And the second input about five 0 five and the output of which is connected respectively to the output of the third trigger and the counting input of the second counter, the information output of which is connected to the control input of the multiplexer, the output connected to the second input of the fifth element And, the second input of which is connected to the second output of the pulse distributor and the clock input of the single generator pulse, the second input of the second element And is connected to the transfer output of the second counter, the second input of the second element SHS to i the first input of the seventh element And, the second input and output of which first connected respectively to the output of the fourth trigger and the setup input of the fifth trigger, reset inputs connected to the output of the third SHS element, the reset input of the third trigger is connected to the outputs of the second OR element, the third and fourth inputs of which are; It is connected respectively to the outputs of the fourth element And the fifth trigger, the output of the comparison circuit is connected to the third input of the fourth element And, the second and third inputs of the second display unit are connected respectively to the output of the fifth and second triggers, the installation input of the fourth trigger is connected to the output of the fifth element I, the output of the fifth element SHS is connected to the input of the third counter. but J5 Phage.1 ppppppppppppp: jy { paw p p p p pp p p p Phage.1 pp