SU1236428A1 - Device for diagnostic testing of technical objects - Google Patents

Abstract

The invention relates to automation and computing and can be used to diagnose faults in continuous objects. The purpose of the invention is to expand the functionality of the device by providing diagnostics of faults in the dynamic mode of diagnostics. The device contains two keys, the element is NOT, the indicator of the healthy state, the element OR-NOT, the decoder of the state of elements, the indicators of failures, the com.parator, the dynamic model of the object of diagnosis. By introducing a dynamic model of the diagnostic object, it is possible to generate a feedback signal and generate reference signals in the dynamic mode of operation of the diagnostic object, which expands the functionality of the device. 2 Il. (With CA 05 4 N5 OO

Description

The invention relates to automation and computing and can be used to diagnose faults in continuous objects.

The purpose of the invention is to expand the functionality of the device by providing diagnostics of faults in the dynamic mode of operation of the object of diagnosis.

FIG. 1 shows a diagram of the device; in fig. 2 - table of the truth of the decoder.

The device for diagnosing technical objects (Fig. 1) contains the first 1 and second 2 keys, the element NOT 3, the indicator 4 of the healthy state, the element OR-NOT 5, the decoder 6 of the state of the elements, indicators 7.1-7.p failures, comparators 8.1 -8.P, dynamic model 9 of the object to be diagnosed, inputs 10.1-10.p of the decoder 6 of the state of the elements, outputs 11.1-11. Of the dynamic model 9 of the object to be diagnosed. The diagnostics object 12 contains functional elements 13.1.13.

The device works in the following way.

Dynamic model 9, the input of which receives the same signal as the diagnostics object 12, generates signals at the outputs 11.1 - P. The signals that are the signals of the functional elements 13.1.13. The diagnostics object 12 has feedback.

If the diagnostics object 12 is operational, at the outputs of the 8.1.8./d comparators, the result of comparing the output signals of the elements 12.1.12.P with the corresponding output signals from the outputs 11.1 - P. of the dynamic model 9 is reflected by the combination of logic "O. In accordance with the function table of the decoder 6, the state of the elements (Fig. 2) indicators 7.1-7.

A logical "1" signal is generated at the output of the logical element ORI- NOT 5, which turns on the indicator 4 of the healthy state and forms a logical "O at the output of the element NOT 3, while the key 2 is open and the key 1 is closed. The feedback signal from element 13.p is fed to element 13.2.

If the diagnostics object 12 fails, a non-zero combination of signals is generated at the outputs of the 8.1.8.gg comparators and the output of the OR-NOT 5 element is a logical "O", which turns off the healthy indicator 4 and puts the output of the HE element 3 to the logical "1, thereby closing key 2 and opening key 1.

Through key 1, the input of element 13.2 receives a signal of a dynamic model 9 corresponding to the feedback signal from element 6 with a normally functioning object 12.

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The non-null input combination of the decoder 6 of the state of the elements causes the inclusion of the corresponding indicator 7.1-7.y - failures. In this case (taking into account the directivity of the passage of signals), the failure of element 13.1 is indicated if all previous elements associated with it by the chain of passage of signals are intact, which corresponds to the truth of their output signals.

The indications of failures of subsequent elements associated with this failed element 13./ are absent, since these states are indistinguishable due to the false output signal of element 13.d (indifferent state X, Fig. 2-) and are accepted by the corresponding intact element .

If there are failed subsequent elements, the states of which are indistinguishable, they will be detected when the working condition of the element 12./ is restored.

Due to operation with key 1 (2) in case the object 12 fails by the feedback signal from the output of the element 13.l, this signal is replaced by the true signal from the output of the dynamic model 9, which allows determining the cause of the failure of object 12 with an accuracy up to one functional element 13./. In the absence of the possibility of breaking the own feedback of the object 12 between the elements 13./g and 13.2 using the key 2 and the stand of the correct feedback signal from the output of the PP model 9 it is impossible to determine the cause of the failure with the accuracy of the functional element 13 /. since the incorrect signals would give out the elements of object 12 covered by feedback. Moreover, by using the dynamic model 9, it becomes possible to generate a reference feedback signal and set it via key 1 to element 13.2 not only in the static mode of operation of object 12, but also when its state changes, and also to specify comparators 8.1–8. The reference signals in the dynamic mode of the object 12, which allows to diagnose the object 12 in the dynamic mode and expands the functionality of the device.

Claims (1)

Invention Formula A device for diagnosing technical objects, containing an indicator of a healthy state, a state decoder of elements, connected by first outputs with corresponding inputs of fault indicators, a first key connected by an output to the output of a second key and a device output for connecting a feedback input of a diagnostic object, device input for connecting the feedback output of the diagnostic object is connected to the first input of the second key, the input of the device for connecting the signal input of the diagnostic object, characterized in that, in order to expand the functionality of the device by providing diagnostics of malfunctions in the dynamic mode of the diagnostic object, the comparators are entered according to the number of outputs of the diagnostic object, the element NOT the element OR is NOT; the first inputs of the comparators are connected to the corresponding inputs for connecting the signal outputs and the output feedback of the volume diagnostics, the second inputs - with the corresponding the signal outputs and the feedback output of the dynamic model of the diagnostic object, the outputs with the corresponding inputs of the state decoder of the elements and with the corresponding inputs of the OR-NOT element connected by the output with the second input of the second key and the indicator of the working condition directly, and through the element NOT - with the first input of the first switch connected with the second input with the feedback output of the dynamic diagnostic model connected with the input to the device for connecting the signal input of the volume that diagnose. phage FIG. 2