SU1173395A1 - Apparatus for diagnosis of radioelectronic object - Google Patents

Abstract

1.DIAGNOSE DEVICE FOR RADIO-ELECTRONIC OBJECT, containing a group of threshold sensors connected to the inputs of the object state code decoder, a unit of failure indicators of functional elements, the inputs of which are connected to the corresponding outputs of the object state code decoder, the first key, whose information input is connected to the device input and the output with the first output of the device and the output of the second key, the information input of which is connected to the output of the source of reference signals, the control input ne The first key is connected to the first input of the object health indicator block and to the input of the first element NOT, the output of which is connected to the control input of the second key and the second input of the object health indicator indicators block, in order to increase the authenticity of the diagnostic result by providing control threshold sensors, a block of indicators of failures of threshold sensors, an operation mode switch, an OR element, a group of pairs of counter-enabled outputs are entered into the device Auxiliary diode and an additional threshold sensor, the input of which is connected in parallel to the input of the last threshold sensor of the group, and the output to the additional input of the state code of the object, oppositely connected, and with the diodes anodes to the additional outputs of the object state code decoder, and combined cathodes to the corresponding inputs of the block of sensors for sensor failures and to the inputs of the OR element, one of the inputs of which is directly connected to W. with the output of the state code of the object decoder, the output of the OR element is connected to the control input of the first key, the movable contact of the operating mode switch is connected to the main power bus of the code of the object state, the first fixed contact with the second output of the device, and the second fixed the contact is with an additional 00 power bus of the decoder of the object state code. 2. A device according to claim I, characterized in that the decoder of the state code of the object is made of a rectangular resistive-diode matrix, whose vertical buses are connected to the corresponding inputs of the decoder and the outputs of the corresponding second elements NOT connected by inputs to the inputs of the decoder, horizontal Matrix buses are its outputs and decoder outputs, the first group of outputs through the first group of resistors

Description

connected to the main power bus of the decoder, and the second group of outputs through the second group of resistors connected to the additional bus

powering the decoder, the vertical busbars being connected to the corresponding horizontal bus through the diodes in the non-conductive direction.

one

The invention relates to technical diagnostics and is intended to monitor the operability and detect single faults in radio electronic objects consisting of interconnected functional elements (PV).,

The aim of the invention is to increase the reliability of the diagnostic result by ensuring the operability of the threshold sensors included in the device.

Figure 1 shows the functional electrical circuit of a type object and the circuit diagram of the device for its technical diagnostics; Fig.2 is a fragment of the electrical circuit of the decoder with failure indicators.

The device contains a diagnostics object I, a group of threshold sensors 2 (2, 2,), the lowest; an ator 3 of the object status code, a block of 4 PV object failure indicators with indicators, a block 5. of failure indicators of threshold sensors with indicator 5i, –5у, developed 6 diodes, logical element 7 OR, first and second keys 8 (8 and 8.j), block 9 of object performance indicators with an indicator 9 of the object's operability and indicator 9 EXIT of it, source 10 of reference signals (stimuli) , switch 11 operating mode with two sex Lives for normal operation 11 and additional monitoring of sensors 1Ij.

The diagnostic object 1 consists of functional elements (FE 12, 13, 14, and 15, arbitrarily interconnected by functional connections. In this case, elements 15 and 14 are covered by a feedback circuit through key 8. The inputs and outputs of the diagnostic object are labeled 16- 23.

In this example, object 1 contains power supply element 12 with power input 16 and control input 23, as well as elements 13.14 and 15

forming and converting signals with information input 19 and output 22. The outputs of all functional elements form test points 17,18,20 and 21.

The decoder 3 contains the main / power input 24, auxiliary power input 25, information inputs 26-30, outputs 31-37, load resistors 38, elements HE 39, s

switching diodes 40 and 41; feedback input or stimulating signal;

The device also contains an HE element 42.

Sensor 2f is additional to the main (2) and is connected between the test point 21 of the output functional element 15 and the additional input 30 of the decoder.

The keys 8 and 8 allow you to break the feedback between the FE 15 and 14 and connect instead to the object through the input 41 the source 10 reference

signals (stimulating effects).

The device works as follows.

Sensors 2s converts monitored output parameters of the functional elements 12-15 of the object into unified signals of the type 1 (parameter within normal values) or O (parameter beyond 1 of normal values), which are transmitted by parallel code to decoder 3. During normal operation of the object, switch 11 set to position 11, t, e. the second additional part of the decoder (power input 25) is turned off. The decoder converts the signals of a parallel code into single signals formed at its outputs 31,32,33 and 34 according to the algorithm given in the table of failures. If object 1 is operational, then the outputs of all sensors form signals of the form 1, which, by tapping the inputs 26-30 of the decoder, lock with their high positive potentials all the diodes 40 and the outputs 31, which stop shunting this output, at the latter a high Potential type 1, which through the element OR 7 causes the inclusion of the indicator 9 of the health of the object. In this case, the key 8 is open, the key Sj is closed, the indicator 9 for the inoperability of the object is turned off. At all other outputs of the decoder, zero signals arise due to current flowing through one or several cuts 38 and the supply voltage to them, since the individual diodes 40 in the circuit of each output bus are open. As a result, all fault indications are off. If object 1 fails any PE, then the information inputs 26-30 of the decoder receive a combination of signals that is different from the combination 11111; through some diodes 40 a current flows from the power input 24 through a resistor 38 to an input bus having a low (zero) potential, the power supply voltage mainly falls on the resistor 38. At the output 31, a zero signal is formed, the indicator 9 turns off, the indicator 9, . switch on, key 8 opens, the key closes, the feedback between the FE 15 and 14 is broken, the source 10 of the stimulating actions is connected to the FE 14, the object is prepared for detecting a fault in it. The 3 decoder encrypts the object's state code (for example, if F15-11100 fails) and enables the 4 indicator to turn on. For detecting the first kind of failure sensors, when the sensor does not detect the failure, the object is switched to the additional check mode by the switch 11. In this case, the switch 11 is transferred from the position I1 to the position 11 of the FEL12 Power Supply Unit 1 of the object 1 is turned off, and the supply voltage is supplied to the input 25 of the decoder. A sensor having a first kind failure with any input signal always generates a signal of the form 1. Therefore, any such failure, according to the fault table (lines 11-15 of the table), will determine the appearance of a single signal at one of the outputs 35-37 and the corresponding indicator. sensor failure. Detection in the sensors of failures of the second kind, when a working PV by the sensor is recognized as failed, is carried out in the mode of normal operation of the object (switch II to position 11). When a second kind of failure occurs in one of the sensors (in 2), a code value (eg OPT) is generated at the input of the decoder, which coincides with one of the lines 610 (for example, from the 6th) of the failure matrix. The decoder also compares the input code value with the programmed one and thus causes the inclusion of the corresponding indicator (for example, 5). In this case, the object 1 itself remains intact, therefore the feedback by the key 8 should not be broken, which is ensured by applying to it a signal 1 from the outputs 34-37. decoder through element 7 OR. Thus, the device allows detecting in the most unreliable elements of the control system - sensors, single failures of both the first and second kind, expands the functionality of the device and increases the reliability of information received from it about the technical condition of both the object and the device itself. i.e. increases the reliability of the results of technical diagnostics.

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Claims (2)

1. A DEVICE FOR DIAGNOSTING A RADIO ELECTRONIC OBJECT, containing a group of threshold sensors connected to the inputs of the code decoder 'state of the object, a block of failure indicators of functional elements, the inputs of which are connected to the corresponding outputs of the decoder of the state code of the object, the first key, the information input of which is connected to the input of the device, a · output - with the first output of the device and the output of the second key, the information input of which is connected to the output of the source of reference signals, the control input of the first the key is connected to the first input of the block of indicators of the health of the object and the input of the first element NOT, the output of which is connected to the control input of the second key and the second input of the block of indicators of the health of the object, characterized in that, in order to increase the reliability of the diagnostic result by monitoring the operability of threshold sensors, a block of indicator indicators of failure of threshold sensors, an operating mode switch, an OR element, a group of pairs of counterclockwise decoupling diodes are introduced into the device and an additional threshold sensor, the input of which is connected parallel to the input of the last threshold sensor of the group, and the output is connected to the additional input of the decoder of the status code of the object, the pairs of oppositely isolated decoupling diodes by the anodes are connected to the additional outputs of the decoder of the code of the status of the object, and the combined cathodes to the corresponding inputs of the indicator block sensor failures and to the inputs of the OR element, one of the inputs [of which is connected directly 1 £ to the output of the code decoder state of the object, the output of the OR element connected to the control input of the first key, the movable contact of the operating mode switch is connected to the main power bus of the object state code decoder, the first fixed contact to the second output of the device, and the second stationary contact to the additional power bus of the object state code decoder. 2. The device according to claim 1, characterized in that the decoder of the state code of the object is based on a rectangular resistive-diode matrix, the vertical buses of which are connected to the corresponding inputs of the decoder and the outputs of the corresponding second elements NOT connected to the inputs of the decoder, the horizontal matrix buses are its outputs and outputs of the decoder, the first group of outputs through the first group of resistors SU, .., 1173395 is connected to the main power bus of the decoder, and the second group of outputs through the second group of resistors is connected to the additional power bus of the decoder, and the vertical buses are connected to the corresponding horizontal bus through the diodes in a non-conducting direction.