SU911474A1 - Device for detecting failures of radio apparatus - Google Patents

Description

(54) DEVICE FOR DETECTION OF FAILURES OF RADIO ENGINEERING EQUIPMENT

I

The invention relates to radio engineering and can be used to control the parameters of radio engineering equipment on ntechalnye microcircuits.

A device for detecting malfunctions in logic circuits is known, comprising a counter whose outputs are connected to a registration unit, a reference unit and a monitored unit connected by their outputs to the corresponding inputs of the registration and comparison circuit, the second inputs of which are connected to the inputs of the reference unit, and the outputs are to the registration and display units, as well as the generator of control signals, the clock outputs of which are connected to the control inputs of the reference and controlled blocks, to the corresponding inputs I give a comparison circuit, and display units for the registration and the counting input of the counter, setting a zero output gsheratora control signals coupled to respective inputs of the counter, the recording unit, the reference and monitored

blocks, and its outputs - with the outputs of the comparison circuit 1.

The drawback of the device is the accounting of only permanent failures.

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The closest to the proposed owner -.

A device for detecting electronic equipment failures, comprising random variables generators, an adder,

fQ counters, comparators, logic block, program block and input block of set limits, moreover, the outputs of the random variable generator of the first channel are connected to the comparator and the adder, to the second

and the input of which is connected to the output of the random variable generator of the second channel, and the output of the adder is connected to the comparator of the second channel, the outputs of the comparators are connected to counters through the logic block, the second inputs of the comparators are connected to the input unit, while the program block is connected to the controlled inputs of the random generators , comparators, summation and logic block 2.

391

The device does not take into account the presence of failures such as failures, which leads to an error in determining the probabilities of false and undetected failures.

The purpose of the invention is to improve the accuracy of determining the likelihood of false and undetected failures of radio equipment, in particular, by detecting and eliminating from the statistics of failures such as short-term failures.

The goal is achieved by the fact that the device for detecting failures of radio equipment, containing the first random variable generator, the outputs of which are connected respectively to the first inputs of the first comparator and adder, to the second input of which the output of the second random variable generator is connected and the output to the first input of the second the comparator, the second inputs of the first and second comparators are connected to the first outputs of the input limit block, and the outputs to the first and second inputs of the logic block, the first outputs of the software unit is connected to the control inputs of the first and second generators of random variables, comparators, adder and logic logic, contains a third random variable generator, a third comparator, four AND elements, four reversible counters, the corresponding outputs of the logic block are connected to the summing inputs of the corresponding reversible counters and with the first inputs of the corresponding elements And, the output of the third random variable generator through the third comparator is connected to the second inputs of the elements And, the outputs of which are connected the subtrahend inputs of the corresponding reversible counter and the second program block outputs are connected to inputs of the third controllable generator of random variables and third comparator .vtoroy information input coupled to a second output of the input range.

The drawing shows a block diagram of the device.

The device contains the first, second and third generators 1, 2 and 3 random greatness, the first, second and third comparators 4, 5 and 6, reversible counters 7-10, program block I, block 12 input limits, adder 13, block 14 logic, elements and 15-18.

To predict the failures of integrated circuits, indirect parameters are used. Thus, it has been established that failures during the operation of hardware performed on integrated circuits are caused primarily by that.

744.

that the level of active interference is comparable to the level of the useful signal. Therefore, the probability of failure can be determined by the probability of exceeding the level of interference to the maximum possible level.

The device works as follows.

The signals of the generator 1, imitating random changes of the parameter, arrive at

0 comparator 4, gdc, the limits of change of the monitored parameter are set, and the adder 13, which also receives signals from the generator 2, simulating random measurement errors. From the output of the adder 13

5 signals are sent to comparator 5, where the tolerance of the control system is set. At the outputs of Comparators 4 and 5, four types of signals are formed, which characterize the finding of the parameter, and also the parameter plus the measurement error inside the signal and outside the established limits. These signals are distributed by logic block 14 and counted by reversing counters 7-10, respectively. Signals

5, a generator 3 simulating random variations in the level of interference is fed to a comparator 6, where the maximum permissible level of interference is set. At the output of comparator 6, a signal is formed that characterizes

Claims (2)

30 that the interference level exceeds the maximum permissible level, i.e. characterizes the presence of equipment failure. From the output of the comparator 6, the signal enters one of. the inputs of the elements And 15-18. In this case, if the signal from block 14 of logic arrives at the other input of the element, then a signal is generated at the output of this element, which extracts the signal from block 14 from the corresponding reversible counter. Otherwise, the signal in the reversible counter is not subtracted. Thus, the reversible counters 7-10 will not take into account the signal; x 1, which coincides in time with the equipment failure, and therefore, when calculating the frequencies of false and non-occurrence of the window faults (which are equal to the ratio of numbers recorded by the reversing counters 10 and 7 as well as 9 and 8, respectively) will not take into account equipment failures and thereby increase the accuracy of determining the probability of false and undetected failures, to which the frequency tends to be linearly false and undetected failures with a sufficiently large number of measurements rhenium. Program block 11 is defined. The operation of the entire device and the sequence of operation of its individual units. The limits of change of signals are set by block 12 before the start of measurements. The use of the present invention in radio equipment will allow an increase in the accuracy of determining the probability of its failures. At the same time, it is possible to take reasonable measures to prevent possible failures and thereby increase the reliability of equipment during operation. This provision is especially important for high availability systems, for example, for radio systems for receiving and processing emergency signals on moving objects. The invention is a device for detecting failures of radio equipment, containing the first random value generator, whose outputs are connected respectively to the first inputs of the first comparator and adder, to the second input of which the output of the second random value generator is connected, and to the output - the first input of the second comparator, the second inputs of the first and the second comparators are connected to the primary outputs of the input limit block, and the output to the first and second inputs of the logic block; the first outputs of the program block are connected to the control inputs of the first and second random value generators, comparators, adder and logic block, which is characterized in that, in order to improve the accuracy of determining the probability of false and undetected failures, the device contains a third random value generator, a third comparator, four elements And, four reversible counters, the corresponding outputs of the logic block are connected with the summing inputs of the corresponding reversible counters m with the first inputs of the corresponding elements And, the output of the third generator is the case via the third comparator connect with the second inputs of the elements I, the outputs of which are connected to the subtractive inputs of the corresponding reversible counters, and the second outputs of the program block are connected to the controlled inputs of the third random value generator and the third comparator, the second information input of which is connected to the output of the input block limits . Sources of information taken into account during the review 1. Authors certificate of the USSR K 441532, cl. G 01 R 31/28, 1971. 2. Authors certificate of the USSR N 416637, cl. G 01 R 31/28, 1971 (prototype).