SU934476A1 - Device for testing and diagnosis of electronic units - Google Patents

Description

one

The invention relates to automation, in particular to the means of automating the control of digital electronic devices.

A device insensitive to faults is known, containing three working blocks, the outputs of which are connected to the display units through logical blocks of analysis p.

The disadvantage of this device is low reliability of diagnostics of work due to the lack of control of the logical blocks of analysis.

Closest to the present invention is a device for monitoring and diagnosing digital blocks comprising a monitored block, a reference block, a comparator block, an indication block and an analysis block consisting of a switch, a fault register, a controlled generator, a counter and a decoder 2.

The disadvantage of the known device is the lack of self-control during

checks of the controlled block, which reduces the reliability of the control.

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

This goal is achieved by That the device for monitoring and diagnostics of electronic units, containing the storage unit of the check program of the issuance of verification codes of which are connected to the inputs of the monitored and reference units, whose outputs are connected to the inputs of the comparison unit, and the display unit, has introduced the second and third comparison units and

, 5 the decoder of the device state analysis, and the storage unit of the check program contains an additional bus for outputting the test results connected to the first inputs of the second and

Claims (2)

20 of the third comparison block, the second inputs of which are connected respectively to the outputs of the monitored and reference blocks, the outputs of the comparison blocks are connected to the inputs of the state / construction analyzer, the outputs of which are connected to the display unit. The drawing shows the block diagram of the device. A device for monitoring and diagnostics of electronic components contains a block 1 of the verification program storage, a monitored block 2, a reference block 3, a comparison block-6, a decoder 7 for analyzing the state of the device and an indication block 8. The proposed device works in a straightforward manner. At the inputs controlled 2 and this. The ncfiHoro 3 blocks receive the same input actions through the output bus -1 of the check codes of the storage block 1 of the check program. The signals from the outputs of the monitored 2 and reference 3 blocks are received respectively at the first and second inputs of the comparison unit 1, as well as at the second inputs of the comparison units 5 and 6. At the same time, on the bus of outputting the results of the check of the block 1 of the storage of the check program to the first inputs of the blocks 5. 6 comparisons, signals are received that correspond to the output signals of blocks 2 and 3 when they function correctly. Signals from the outputs. all blocks h, 5 and 6 of the comparison are fed to the inputs of the decoder 7 for analyzing the state of the device, the output of which is fed to the block 8 of the display. If the blocks 1-6 are intact, then at all the inputs of the decoder 7 for analyzing the state of the device, signals with level 1 are formed, i.e. 0 1; | j 1 and .C 1, where O is the value of ci | -nale from comparison block 5, j is the value of the signal from the comparison block, C is the value of the signal from comparison block 6 (it is assumed that at the output of each comparison block a signal is generated 1 when comparing input codes and O signals when non-comparison). If the monitored block 2 is faulty, then the signals O are present at the outputs of the blocks 4 and 5 of the comparison, and the output of the block 6 of the comparison is 1, i.e. C1 О, Ъ О, С 1. In case of malfunction of the reference block),. When the verification program storage unit 1 goes out of operation, two cases are possible: a) at the outputs of the storage unit 1 of the inspection program, signals that are different from the set are formed, while the outputs of the monitored 2 and reference 3 blocks are the same (if they are healthy, therefore, ) at the outputs of the storage program 1 of the verification program, signals are generally present, with 0 О, Ь-О, When the blocks of 5 f out of line 5, 6 comparisons have, respectively: 1), 2) 1, 13 O, C 1 3) a 1, t) 1, С О All the above cases of malfunctions are shown in the table: I All blocks are fixed Equal zero of at least one signal at the output of blocks h, 5 or 6 comparisons indicates the presence of a malfunction of one of blocks 1-6. At the same time, it is possible to determine by the content of the signals q, b and C which of the blocks 1-6 is faulty, which is done by the decoder 7 for analyzing the state of the device, the algorithm of operation of which is fully specified in the table above. The display unit 8 signals the device in good or malfunctioning. The proposed device allows to increase the reliability of control due to the self-control of the device and to reduce the time of verification when a failure is detected. Claims An apparatus for monitoring and diagnosing electronic units, comprising a storage unit for an inspection program, a checkout code issuing bus of which is connected to the inputs of the monitored and reference units, whose outputs are connected to the inputs of the comparison unit, and an indication unit increase the reliability of the control, the second and third comparison blocks and the decoder of the device state analysis are entered into it, and the check program storage block contains an additional bus for outputting the test results and connected to the 6 first inputs of the second and third comparison blocks, the second inputs of which are connected respectively to the outputs of the monitored and reference blocks, the outputs of the comparison blocks are connected to the inputs of the device state analysis decoder, the outputs of which are connected to the display unit. Sources of information taken into account during the examination 1. Savchenko Yu.T. Digital devices insensitive to faults. M., Soviet Radio, 1977, p. 15-16. 2. USSR author's certificate No. 605216, cl. G About F 11/00, 1978 (prototype).