SU1339503A1 - Device for diagnostics of automatic control systems - Google Patents

Abstract

The invention relates to automation and computing and can be used to monitor and diagnose automated information processing and control systems. The purpose of the invention is to increase the reliability of the diagnostic results. The device contains a code converter, a display unit, a test driver, a time relay, a key, a controlled decoder, first and second pulse drivers, first, second and third OR elements, groups of memory elements and elements AND, And element, binary counter and demultiplexer. The display unit contains a group of 2 indicators, control indicators 24, health conditions 26 and failure 25, the first 19, the second 20 and the third 21 And elements, the first 22 and second 23 NO elements, the first 28 and second 13 memory elements. The controlled descrambler consists of a unit 8 for setting reference values and a matching circuit 9. The device allows you to record combinations of both health and failures, makes it impossible to skip the monitoring cycle when a decoder triggers falsely, and reduces the likelihood of recording false information from the results of diagnostics. 2 h..p. f-ly, 1 ill. (L co. Co. E. C.

Description

The invention relates to automation and computing and can be used to control information processing systems.

The purpose of the invention is to increase the reliability of the diagnostic results.

The drawing shows the functional diagram of the device.

The device contains a code converter 1, a group of indicators 2, an indication unit 3, a test driver 4, a time relay 5, a key 6, a control decoder 7, consisting of a reference value setting unit 8 and a coincidence circuit 9, and having information inputs 10, control input input 11 and outputs 12, second memory element 13, first pulse shaper 14, first 15 and second 16 OR elements, groups of 17 memory elements and AND 18 elements (the number of which is equal to the number of controlled bits multiplied by the total number of test combinations). The first 19, the second 20 and the third 21 And elements, the first 22 and the second 23 NOT elements, the control indicator 24, the failure indicator 25, the health indicator 26, the distributor 27, the first memory element 28, the And element 29, the second pulse shaper 30, binary the counter 31, the demultiplexer 32, the third element OR 33, In addition, the drawing shows a controlled system 34 and an input 35 of the device.

The device works as follows.

When a positive-polarity impulse signal arrives at input 35 via closed key 6, memory element 28 and control element 20 turns on the control indicator 24, the signal that the system control has begun. With the same signal (negative differential), through the SHSh 15 element, the distributor 27 is started, which gives a signal to the generator. 4 test tests. The latter issues the first test combination for monitoring the system 34, the signal from the distributor 27 through the liHM 16 element and the pulse shaper 14 starts the time relay 5 and prepares a control decoder for analyzing the combination entering the inputs 10 from the system 34 via the converter 1

five

five

0

five

0

five

0

five

code. The same impulse arriving at the counting input of the binary counter 31, at the outputs of the counter 31, sets the address corresponding to the first test cycle. In the case of the correct operation of the system 34, the combination of the INPUT signals coincides with the reference set by the unit 8 to set reference values. At the same time, at the outputs 12 of the matching circuit, the states of a logical zero are set. Time relay 5 sets the delay, which is longer than the response time set at outputs 10 after setting the test action. The delay set by relay 5 exceeds the maximum response time at the outputs of the diagnostic object for any of the specified tests (if, due to a malfunction of the diagnostic object, the test is still delayed more than the response time of relay 5, the information at the output of the object does not match the reference and a fault message is written to the memory elements, which somewhat reduces the quality of diagnostics). After the response combination has been established, 5 times are triggered and a second pulse generator 30 is triggered by a positive differential pulse. By a positive differential pulse of this shaper arriving through the information input of the demultiplexer to the control inputs of the memory elements 17 of the first monitoring cycle, the code combination installed at the outputs 12 of the control decoder is written to these memory elements.

In the event of a malfunction of the system 34, the information supplied through the code converter 1 to the information inputs of the control decoder 7 does not match the reference one, and on those outputs 12 of the control decoder 7 over which a mismatch occurred, the state of the logical unit appears. The set of zeros and ones thus obtained is recorded by the pulse of the second imaging unit 30 in the memory elements 17 (in the case of the health of the system 34, only the zeros are written in the memory elements 17).

Simultaneously, in the event of a malfunction of the system 34 at the output of the third

element OR 33, the state of the logical unit is established, which, by a pulse of the second imaging unit 30, through elements 29 and 21 is written into memory element 13 and leads to the failure indicator 25 being turned on. By a negative differential of the same pulse through the first element OR 15, the distributor 27 and the test generator 4 sets the next test pattern corresponding to the second test cycle.

The operation of the device in the second and subsequent cycles is similar to the first cycle. In this case, the reference value setting block generates a new reference combination corresponding to the next test cycle, the binary counter sets the next address for the demultiplexer, which connects the output of the second pulse generator to the control inputs of the memory elements 17 corresponding to this test cycle. After all the test cycles have been completed with the signal from the last distributor 2 output

 through elements 18 and 18, the indicators 2 of those bits for which

proizoshchel failure. At the same time, the indicator 24 of the control is turned off. The failure indicator 25 is turned on when the first malfunction occurs. If the system 34 is operational, after the monitoring cycles have ended, the health indicator 26 turns on, while

 All indicators 2 are off.

Claims (3)

1. A device for diagnosing systems, automatic control, comprising a key, first and second elements OR, distributor, first pulse driver, test driver, time relay, display unit, code converter, control decoder, group of memory elements and group of first elements . And the outputs of which are associated with the group of first inputs of the display unit, the first input of each of the first elements And are connected to the output of one of the memory elements, and the second inputs of the first And elements are connected to the first output of the distributor, also connected to the second input of the display unit The third input is connected to the output of the key, connected 0 five 0 five 0 five 0 five 0 five The data and control inputs of the key are the device inputs, the output of the first element OR is connected to the input of the distributor, the group of second outputs of which is connected to the inputs of the test driver and the second element OR, the output of the first pulse driver is connected the time relay input, the test driver outputs are the device outputs for connecting the diagnostics object. the sticks, the output of the second element OR is connected with the input of the first pulse generator and with the control input of the decoder, the information inputs of which are connected to the outputs of the code converter, and the outputs with information inputs of the memory elements, the inputs of the code converter are inputs to the device the object of diagnostics, which differs in that, in order to increase the reliability of the results of diagnostics, it includes the second pulse shaper, the second element AND, the third element (MENT OR, the binary counter and demultiplier the corr, whose outputs are associated with the address inputs of the memory elements, the control inputs with the outputs of the binary counter, and the information input as well as the first input of the second element AND and the second input of the first element OR are connected to the output of the second pulse shaper connected the input to the output of the time relay, the inputs of the third element 11LI are connected to the outputs of the control decoder, and the output is connected to the second input of the second element AND connected to the output to the fourth input of the display unit, the output of the second element OR is connected with tnym input of a binary counter, whose reset input is connected to the output key. 2. The device according to claim 1, characterized in that the display unit contains a group of indicators, indicators of health, monitoring and failure, the first, second and third elements AND, the first and second memory elements, the first and second elements NOT, the outputs of which are connected respectively to the first inputs of the first and second elements And, the second inputs of which and the first input of the third element And are connected to the output of the first 513395036 memory element whose input is 3. The device according to claim 1, which is the third input of the unit, the second is that the control input of the third element I is a remote control unit comprising a task block the fourth input of the block, and the input of the second-reference values and the scheme of the matching element are NOT and the third input of the first, the group of the first inputs of which element And are combined and are connected to the outputs of the task block the second input of the block, the output of the second atomic values, whose input the memory element is connected, to the inputs is the control input of the de-indicator of the failure and the first element-Q encoder, the group of the second inputs that NOT, the inputs of the health indicators of the coincidence circuit is the info control are connected by the corresponding inputs of the decoder, and with the outputs of the first and second element-outputs of the coincidence circuit serve Commod And And, the inputs of the group, the indications of the water-as outputs are decoded by the group of the first inputs of the block, pa.