RU2631989C1 - Device for diagnostic control of verification - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: device contains a test generator, a monitoring object model, standard micromodules, a switch, a comparison scheme, a reference monitoring object, a count of the number of detected faults, a count of the number of faults entered, a divider, a random number generator, a fault input unit, a control unit, a delay element, 2 OR elements, the counter for setting the number of malfunctions, the control trigger, the element and the control unit of the test generator.

EFFECT: shortens the time of inspections to diagnose any malfunctions.

1 dwg

Description

The invention relates to computer technology and can be used to compile tests of complex digital systems. Known for their practical use of the device for monitoring digital modules and checking the quality of tests, they are characterized by the fact that they contain a model of the object of control, a comparison unit, a reference unit, counters of detected and input faults, a control unit, a fault input unit and allow monitoring with relatively high quality [ one].

The disadvantage of these devices is the long time required to assess the completeness of the tests, due to the need to iterate over the set of faults.

The closest in technical essence is the device for generating control tests, containing a random number generator, clock counters, a control unit, characterized by a large volume of checks that can be subjected to control at the same time [2].

The use of such a device is limited by the long time it takes to form the optimal test, associated with the random enumeration of a large number of different test cases and their subsequent assessment over the entire set of faults.

The objective of the invention is to provide a device that minimizes the time spent on inspections.

The required technical result is achieved by the fact that the device for checking the completeness of the tests contains a test generator, a model of the control object, standard micromodules, a switch, a comparison circuit, a reference control object, a counter of the number of detected faults, a counter of the number of entered faults, a divider, a random number sensor, an input unit faults, control unit, delay element, 2 OR elements, counter for setting the number of faults, control trigger, AND element and control unit for test generator.

The invention is illustrated in the drawing, where in FIG. 1 shows a possible embodiment of a device for diagnostic monitoring of checks performed, which accordingly contains:

1 test generator

2 model of the object of control,

3 standard micromodules,

4 switch

5 comparison chart,

6 reference control object,

7 counter of the number of detected faults,

8 counter of the number of entered faults,

9 divider

10 random number sensor,

11 fault input unit,

12 control unit,

13 element delay

14 element OR,

15 counter for setting the number of faults,

16 trigger control,

17 element And,

18 element OR,

19 test generator control unit.

The device for diagnostic control of the checks performed works as follows: the number α-n is recorded on the counter 15 for setting the number of faults on the fourth input of the control unit 12, where α = 2k, k is the number of bits of the counter 15 for setting the number of faults, n is the number of input faults. Then, the “Start” signal is applied to the third input of the control unit 12, which sets the trigger 16 of the control to zero and through the OR element 18 connected to the second output of the control unit 12, enters the inputs of the random number sensor 10, counter 8, the number of malfunctions, counter 15 setting the number of faults and to the input of the control unit of the test generator 19, performing its reset. After that, the signal from the output of the control unit 19 connected to the output of the OR block 18 starts the test generator 1. The random number sensor 10 generates an equiprobable number corresponding to the fault number of the object, control. The code corresponding to a randomly selected fault number is fed to the input of the fault input unit 11, which generates a control signal for the switch 4 of model 2 of the control object. The switch 4, in accordance with the control signal, breaks or short-circuits the individual circuits connecting the standard micromodules 3, thereby simulating a randomly selected malfunction of the "open" or "short circuit" type.

The generator 1 of the tests begins to generate an input sequence of signals of the test being tested, which is fed simultaneously to the inputs of the same model 2 of the control object and the reference control object 6. The signals from the outputs of model 2 of the control object and the reference control object 6 are supplied to the comparison circuit 5 t. When a malfunction is detected, the comparison circuit 5 generates a signal that goes to the input of the counter 7 of the number of detected malfunctions and to the first input of the control unit 12, where through the OR element 14 and the AND element 17 it enters the input of the OR element 18. The signal from the output of the OR element 18 also as with the “Start” signal, it resets the generator 1 of the tests, turns on the random number sensor 10 to generate the next random fault number, adds one to the contents of counter 8 of the number of entered faults and installation counter 15 Isla fault and input to the delay element 13.

The fault input unit 11 introduces a new randomly selected fault into the model 2 of the monitoring object. The signal from the output of the delay element 13 is supplied to the test generator 1, to re-generate the test being tested.

Next, the process of the device is repeated.

If the malfunction introduced into the model 2 of the test object is not detected, then the control unit 12 receives a signal to continue the test not from the output of the comparison circuit 5, but from the output of the test generator 1 after generating all the test signals.

After checking the specified number of malfunctions, the counter 15 for setting the number of malfunctions is overflowed, and the signal from its output sets the trigger 16 of the control to one state, prohibiting the passage of signals through the And element 17. The signals to the start input of the test generator 1 cease to be received and the formation of test sequences ceases.

By this time, on the counter 7 of the number of detected faults, the number m of detected faults was recorded, and on the counter 8 of the number of entered faults - the total number n of entered faults, on the divider 9 - the relative number q = m / n <1 of detected faults, which determines the completeness of the test.

INFORMATION SOURCES

1. SU 519713, 1977.

2. SU 1605208, 1986.

Claims (1)

A device for diagnostic monitoring of performed tests, containing a test generator, a model of the control object, standard micromodules, a switch, a comparison circuit, a reference control object, a counter of the number of faults detected, a counter of the number of faults entered, a fault input block, a control unit, a delay element, 2 OR elements , a counter for setting the number of faults, a control trigger, an AND element, a test generator control unit, characterized in that a random number sensor is additionally introduced into it and a divider, and the outputs of the counter of the number of detected faults and the counter of the number of entered faults are connected to the corresponding inputs of the divider, the input and output of the random number sensor are connected to the second output of the control unit and the input of the fault input block.

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