SU1336037A1 - Electric wiring checking device - Google Patents

Abstract

The invention relates to automation and computing and can be used to control the installation of electronic circuits. The purpose of the invention is to increase the completeness of the control. The device contains a pulse generator 1, counters 2 and 12, switches 4 and 5, a storage unit of a standard 7, an element of comparison 8, an element AND 10, a pulse shaper 9, decoders 3 and 13, a block of permanent memory 14, a trigger 11, a block of triggers 16, display unit 15. In the invention, greater control is provided by increasing the diagnostic information and using the full tests generated by block 14. 4 Il. co soa a co (Rig.1

Description

The invention relates to automation and computing and can be used to control the installation of electronic systems.

The purpose of the invention is to increase the completeness of the control.

FIG. 1 shows a functional diagram of the device; in fig. 2 - functional block diagram of the trigger; in fig. 3 - the functional scheme of the display unit; in fig. 4 is a functional block diagram of the memory.

The device contains a pulse generator 1, the first counter 2, the first decoder 3, the first switches 4 and second 5, the control object 6, the standard storage unit 7, the comparison element 8, the pulse shaper 9, And 10 element, the trigger 11, the second counter 12, the second decoder 13, fixed memory block 14, display block 15, trigger block 16.

The trigger block 16 (Fig. 2) contains two RS flip-flops 17. The display block (Fig. 3) contains 18 contact number indicators, 19 test set number indicators, a fault type indicator 20, and a 21 indicator.

The fixed memory unit 14 (FIG. 4) contains the elements of the memory 22, made in the form of programmable fixed memory microcircuits.

FIG. 1 marked key 23.

The device works as follows.

Each output contact of object 6 core {trol corresponds to a specific code of counter 2. The input of counter 2 receives pulses from generator 1. This counter controls switches 4 and 5. The address inputs of these switches alternately receive the addresses of all output contacts of the object being checked 6. In the moment of overflow, the counter 2 returns to its original position and generates a transfer pulse to the input of the counter 12, which at its outputs forms the next binary word supplied to the address inputs of elements 22 (PROM) of the permanent memory block 14 Ti. From the output of the fixed memory unit 14, the corresponding test set is fed to the input contacts of the object under test 6 and the standard storage unit 7. After supplying the test set to the inputs of the object 6 and block 7, according to the commands of the counter 2, the switches 4 and 5 alternately connect the corresponding outputs of the object 6 and block 7 to the inputs of the comparison element 8. Under the condition that the communications are identical, the logical levels of the switches 4 and 5 will be equivalent. The element compares these logic levels, and in the event of a discrepancy, they are formed by a pulse signal applied to the flip-flops 17 of the flip-flop 16. Block 16 generates a potential fault signal supplied to the pulse shaper 9 and the pulse signal to

0

the input element And 10. From the output of the element And 10 this signal is fed to the input of the trigger 11 and sets it to the “O” position, thereby stopping the counter 2.

Comparison element 8 gives four possible states of each point of the test object: the point is not connected to the exciting circuit (at the outputs of switches 4 and 5 are low levels), the point is connected to the excited circuit (high levels at switches 4 and 5), extra connection - short circuit (high level at the output of switch 4 and low at the output of switch 5), the missing link is a break (low level at the output of switch 4

5 and high at the output of the switch 5).

Naturally, when the outputs of the object 6 and block 7 are identical, the pulse fault signal does not come to the input of block 16. The signals from the outputs of the comparison element 8 and the trigger unit 16 are fed to the input of the imaging unit 9, and then to the corresponding input of the display unit 15. A signal corresponding to a point not connected to an excited circuit does not cause

the indicator 20 lights up. A signal corresponding to a point connected to an excited circuit causes the indicator 20 to glow continuously. Signals from points corresponding to an extra link or an open circuit cause the indicator 20 to flash with different

0

frequencies, respectively, 3 and 1 Hz.

Decoders 3 and 13 control, respectively, the operation of the indicators 18 contact numbers and 19 test set numbers.

If a fault is detected (break

2 or link) trigger 11 is set to the "O" state and blocks the operation of counter 2. Block 15 displays the numbers of the malfunctioning output, the test set and the nature of the malfunction (open, short). If necessary, check

40 circuits following a failed one, trigger 11 is set to state "1 with a restart key. When overflow, the counter 12 (this corresponds to the end of the test) generates a program stop impulse, affecting the second input of the element 10, trigger 11, and turning on the indicator 21. It is suitable for block 15. Compared with the known device, the proposed device is simpler due to exclusion from the CRT circuit and complex system of control PIA by it. In addition, decoders 3 and 13 were introduced, as well as blocks of triggers and indications, which allow indicating not only the type of malfunction, but also the numbers of the contact and test set, thereby ensuring greater consistency and completeness of control, as well as the same (block 14) programmable test generator sets, allowing to make check of installation of the objects demanding giving of various test sets.

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Claims (1)

Invention Formula A device for controlling electrical installation, comprising a pulse generator, two counters, two switches, a storage unit for standards, a reference element, an And element, a pulse shaper and a display unit, the output of the pulse generator is connected to the counting input of the first counter, the data outputs of which are connected to the address inputs of the first and the second switch, the outputs of which are respectively connected to the inputs of the comparison element, the output of which is connected to the first input of the pulse shaper, the information input of the first switch connected to an input device for connection to the outputs of the control object, an information input of the second switch - to the output of the reference storing unit, whose inputs are connected to outputs of the device for connection to the inputs of a control object, wherein; that, in order to increase the completeness of the control, two decoders, a permanent memory block, a key, a trigger block and a trigger, data outputs were entered into the device 0 and the overflow output of the first counter are respectively connected to the inputs of the first decoder and to the counting input of the second counter, the outputs of the group of which are connected via the second decoder to the inputs of the first group of the display unit, the inputs of the second group of which are connected to the outputs of the first decoder, the output of the second counter is connected to the first inputs of the block indication and element And, the second input of which is connected to the pulse output of the trigger unit, the potential output of which is connected to the second input of the pulse former, the output to orogo connected to the second input of the indication unit, The 5 control yu input of the first counter is connected to the trigger output, the setup input of which is connected via a switch to the power bus and the reset input to the output of the And element, the outputs of the second counter group are connected to the address inputs 0 of the fixed memory unit, the outputs of which are the outputs of the device for connection to the inputs of the control object, the output of the comparison element is connected to the installation input of the trigger unit. fuz. 2 / Contact numbers N ,. about  test set 20.. | L 12 Rig.Z