SU748424A1 - Device for diagnosis of faults - Google Patents

Description

(54) TROUBLE DIAGNOSTIC DEVICE

one

The invention relates to the field of automatic control and can be used to process information obtained during the control.

A device for diagnostics of faults is known, in which information about the technical state of an object of control are electrical voltages depending on time. neither clj,

The disadvantage of the device is the limited scope.

The closest in technical essence to the present invention is a device for diagnosing faults 2, adopted as a prototype and containing a parameter input unit and a memory unit, an arithmetic unit and an indication unit connected in series. ,

The disadvantage of the device is the low reliability of processing the results of the control.

The aim of the invention is to increase the reliability of processing control results.

The goal is achieved by the fact that the device contains valve elements

and elements And, each output of the parameter input block Through the first valve element is connected to one input of the corresponding element And, and through the second valve element - to the corresponding first input of the storage unit, the second inputs of which are connected to the outputs of the corresponding elements And, other inputs

10 connected to the outputs of the parameter input unit through the corresponding third valve elements.

The drawing is a schematic diagram of an electrical circuit. ,

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In the drawing, the parameter input unit 1, the parameter correction input unit 2, the storage unit 3, the arithmetic unit 4, the display unit 5, keys b, valve elements 7, are indicated. elements And 8, variable resistors 9, first and second amplifiers 10 and 11, threshold elements 12, fixed resistors 13, indicators 14.

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The device works as follows.

The operation begins with the inclusion of keys 6 of block 1 corresponding to the diagnosed parameters of the objects.

that control. Voltage through keys

I are supplied to the valve elements 7 and the elements of 8. At the same time, part of the AND cells is triggered (depending on the switched on switches b and the considered connections between them) and outputs signals to the input of resistors 9. Resistors 9

and the amplifiers 10 are chosen so that the voltages taken from elements 7 and 8 will be changed (reduced) in accordance with the specific gravity of the parameter for this fault. The voltages taken from the resistors 9 and the amplifiers 10 are summed (subtracted) by the amplifiers 11. At the outputs of the amplifiers 11 there will be different voltages corresponding to possible malfunctions of the test object. Voltages removed with. the amplifiers 11 are compared with the reference thresholds in the circuits of the elements 12. If the voltage from the amplifiers

If it is equal to or larger than the reference one, element 12 will work and turn on the indicator 14, which indicates the type of fault, otherwise element 11 will not work.

The effectiveness of this diagnostic computing device n in comparison with the known one is that it allows to increase the accuracy and accuracy of diagnostics with large sets of parameters 2-5 times

Claims (2)

1..Turbovich N.T. et al. Identification of Images, Moscow, Science, 1971, p. 229. 2. USSR author's certificate number 181880, cl. G About F 15/46, 1965 (prototype).