SU1121651A1 - Device for diagnosing interconnected electronic units dispensation - Google Patents

Abstract

1. DEVICE FOR DIAGNOSTICATION OF ASSOCIATED ELECTRONIC BLOCKS, containing sensors of tolerance control outputs connected to the inputs of the state code recognition unit, and indicators, which, in order to reduce the time for troubleshooting and simplify the device, the 9ii.t recognition module, characterized by the fact that, in order to reduce troubleshooting time and simplify the device, the 9ii.t. from the elements And but the number of diagnosed blocks, & also from the switch and the first and second 1B1s, and the indicators are divided into two groups - indicators of the technical state of the diagnostics T1fue1 "| 1x blocks and indicators of the technical state of the elements of the diagnosed blocks, the recognition block of the state code is connected to the information of the 1901о (П1 || В4 and inputs of the commutator and through the corresponding AND elements — with one of the inputs of the first decoder connected via RSLtm to the inputs of the indicators of the technical state of diagnostic units and to the control inputs of the switch, the outputs of which through Ora decoder soeda1n "us with vhodash indicators consist S. elements diagnosable blocks. A n and

Description

2. The device according to claim 1, wherein the first to the second design is made on the basis of a triangular resistive-diode matrix, in which each of its output through a resistor is connected to the output of the power source, and each input through the corresponding separation

The diode connected in the non-conducting direction is connected to the corresponding output of the matrix and through the corresponding element NOT to the cathode of the corresponding separation diode, each of which is installed on the resistor side only up to the main diagonal of the matrix.

one

The invention relates to technical diagnostics and is intended to monitor the operability and detect failures in electronic objects consisting of interconnected functional elements (blocks).

Known devices dp control of operability of electronic objects and the search for failed functional elements in objects that implement a consistent search for failures in a flexible program and contain threshold or tolerance control sensors connected through a switch with a logic device to which the indicators of failure 1 are connected

Such devices are narrowly specialized, have relatively low speed, are relatively complex due to the large number of elements and indicators used.

The closest to the proposed technical essence and the achieved result is a device that implements a combination fault search and contains m sensors that monitor the output parameters of the diagnostic object connected to the matrix decoder directly and through the logical elements NOT. A rectangular diode matrix was used as a matrix decoder. The matrix matrix decoders are connected to the C 2 J fault indicators.

The described device is simpler and has a high speed. However, with sufficiently complex objects containing a large number of functional elements, and when functional groups of elements — channels, subsystems, blocks, subunits — can be distinguished in a diagnostic object, the known diagnostic device becomes complicated and, consequently, increases in size and cost; changing the structure of an object requires a change in the structure and diagnostic device; a large number of indicators of a single diagnostic level makes it difficult and difficult to perceive information

operator increases the time spent by the indicator.

To implement a given depth of failure search, the use of a single depotfrarator unnecessarily complicates and increases the cost of a diagnostic device due to the excessive number of diodes and indicators used in this process. So, for example, when using even a minimized resistive-diode array as a decoder for determining single failures in an object containing m functional elements, the number of necessary diodes in the array

5 is Dem, and the number of indicators is n.

DP diagnosing an object with a new (for example, fewer) number of functional elements (PV) and new connections between the PV diagnostics device must contain in the matrix m 2 diodes and a unit for bringing the name of indicators into line with the new structure of the object being diagnosed.

The purpose of the invention is to reduce troubleshooting time and simplify the device.

The goal is achieved by the fact that in the device dp diagnostics containing tolerance control sensors, outputs connected to the inputs of the state code recognition block, and indicators, the state code recognition block is made of AND elements by the number of diagnosed blocks, as well as from the switch and the first and the second decoders, and the indicators are divided into two groups - I1shchikatorov technical condition of the diagnosed blocks and indicators of the technical condition of the elements of the diagnosed blocks, the inputs of the recognition block The status code is connected to the information inputs of the switch and. through the corresponding elements And with one of the inputs of the first decoder connected by outputs to the inputs of indicators of the technical state of the diagnosed blocks and to the control inputs of the switch, the outputs of which through the second decoder are connected to the inputs of the indicators of the state of the elements of the diagnosed blocks. In addition, the first and second decoders are made on the basis of a triangular resistor-diode of the matrix, in which each of its outputs through a resistor is connected to the output of a power source, and each input through a corresponding separating diode connected in a non-conductive direction, and through the corresponding NOT element with the cathode of the corresponding separation diode, each of which is installed on the resistor side only up to the main diagonal of the matrix. FIG. Figures 1 and 2 show various diagnostic objects with tolerance control sensors built into them; on r. 3 - the functional scheme of the proposed device; in fig. 4 is a decoder circuit; ne figure 5 diagram of the switch. . The diagnostic objects (.1,2 are divided into two levels; blocks t, 2 and 3 are functional elements of the highest level, and elements 4-11 of blocks 1,2 and 3 are functional elements of the lower level. The output signal of each functional element is monitored by sensor 12-19. Sensors convert the visual values of the monitored parameters into binary signals of type 1 (parameter within normal values) or O (parameter outside the limits of normal signals (achemes). 514 The device (Fig. 3) contains elements And 20, 21 and 22, first decoder 23 (top level), in the detector 24 is the normal operation of the object, indicators 25, 26 and 27 failures at the highest diagnostic level, the switch 28, the second decoder 29 (lowest level), indicators 30, 31 and 32 failures at the lowest level. Elements 20-22, decoders 23, 29 and the switch 28 is the elements of the state code recognition unit, the indicators 24-27 are the indicators of the technical condition of the diagnosed blocks, and the indicators 30-32 are the indicators of the technical condition of the elements of the blocks being diagnosed. The decoders 23 and 29 of the state code of the object at the appropriate level (Fig. 4) consist of the logical elements HE 33-35, diodes 36-44 and resistors 45-48. Each decoder has input buses 49 (50), 51 (52), 53 (54) and output buses 55, 56, and 57, which are connected to light-emitting diodes 25 (30), 26 (31), 27 (32 ) respectively. The decoder 23 also has an output bus 58 connected to the indicator 24 of the normal functioning of the object. Switch 28 (FIG. 5) contains inputs that are informational and connected to buses 59-67, and inputs that control and are connected to buses 55-58, and elements AND 68-76 and elements OR 77-79. The inputs of the decoder connected to the tires 49.51 and 53, through the elements And 20-22 are connected only to those sensors that control the object at the highest level (at the block level). The inputs of the decoder 29 connected to the b1 50, 52 and 54 bus, using the switch 28, can be connected to any group of sensors that control a certain group of block elements, causing the object to be diagnosed at the lowest (second) level. The decoder 23 controls the switch 28. The decoders are made on the basis of a triangular resistive-diode matrix Qi with which you can decrypt the Shannon-Fzno binary reverse economy code, each message of which has the form: 0; ten; 110; 1 ... 10. The state tables of scientific research institutes of any objects with single failures are easily reduced to the Shannon-Feno code if each functional element of the object has a sequence number greater than the number of the element on which it functionally depends. The table of such code combinations (messages) has the form of a triangular matrix: refused 4 failed refused 6 58 - the object is healthy The device works as follows. Sensors (primary measuring transducers with discrete output convert physical quantities of the parameters being monitored to functional elements into a signature of type 1 (parameters are normal) or O (parameters are not normal), which are received through the corresponding elements AND 20-22 to the main inputs and through the elements NOT 33-35 to the additional inputs of the decoder 23. At the same time, signals of the type 1 and O from all sensors of one of the diagnosed blocks through the switch 28 arrive at the main inputs directly and through the elements NOT 33-35 to the additional inputs Descrambler s 29. From the outputs, signals can go to the corresponding indicators 25-27 and 30-32, as well as to the indicator of the normal functioning of the object, while the indicators turn on when signals of their type 1 are received at their inputs (high potential voltage). Signals of the type 1 are formed at the outputs of all sensors that are in good condition, and only single signals appear on all inputs of the decoder 23. Zero potentials appear on the additional inputs of the decoder 23, diodes 36, 38 and 41 open through resistors 45 , 46 and 47 a current flows, the voltage of the matrix power supply is fully applied to the resistors 45-47 and low (zero) potentials are formed on the output buses 55, 56, 57. Diodes 42, 43, and 44 are then closed, with high unit potentials, on the output bus 58 a high potential is formed, which causes the indicator 24 to turn on. Since the decoder 29 has a bus 58, all its indicators are off. In case of failure of any functional element of block 2, for example element 9 ,. At the output of the sensor 17, which controls the failing functional element, as well as the sensors 18 and 19, controlling the output parameters of the functional, 1x signals dependent on the failed element appear. O signal appears. This leads to the buses 49, 51 and 53 A code combination of type 100 and therefore all zero bus diodes are simultaneously closed, and of all the highest level indicators, indicator 26 of the failed element is on. This combination of signals 100 at the inputs of the decoder 23 appears when any element (7, 8 or 9) of block 2 fails. A single signal that turned on the indicator of failure of block 2 does not simultaneously arrive at the second inputs of the AND elements 71-73 of the switch 28 , opening them dp passes signals from sensors that control the functional elements of the failed unit 2, bus 50, 52 and 54. At the outputs of the elements OR 77-79 switch 28, and therefore, at the inputs of the decoder 29 when element 9 fails, a set of signals 110. The appearance of an aggregate or combination Signals 110 on buses 50, 52 and 54 means the arrival of high positive potentials on buses 50 and 52 and zero potential on bus 54. At the additional inputs of the matrix, inverted signals are generated due to the elements HE 33-35. All diodes, connected to vertical and horizontal busbars of the matrix and to the cathodes of which are supplied

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the positive potentials from the vertical busbars of the matrix lock up and become non-conductive.

With the described potential distribution, the diodes 36, 38 and 44 are open, and the remaining diodes are closed. Therefore, electric current flows through resistors 45, 46, and 48 through the appropriate circuits: plus current source, resistor 45, diode 36, HE element 33, minus current source; plus current source, resistor 46, diode 38, element 34, minus current source; plus current source, resistor 48, diode 44, bus 54, switch element OR 79, minus current source. The voltage of the current source almost completely drops across resistors 45, 46, and 48, so low (zero) potentials are formed at the inputs of indicators 30 and 31, and these indicators do not turn on. There is no current flowing through the resistor 47, since the diodes 39, 40 and 41 are covered with high potentials from the side of the vertical busbars of the switch. Therefore, the high potential of the current source through the resistor 4-7 goes to

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the progress of indicator 32 and determines its inclusion.

Thus, in case of failure of the functional element 9 of the monitored object, indicators 26 and 32 are turned on in the device for diagnostics, which means the failure of the third element 9 in the second block 2. The remaining indicators are turned off.

The proposed device for the technical diagnostics of complex radio-electronic objects consisting of interconnected blocks differs from those known for its simplicity, the minimum number of logic elements and indicators, low cost, the ability to diagnose various objects having different functional connections between elements with one device without reconfiguring it. and a different number of elements. A significant reduction in the number of indicators improves the ability to perceive information from indicators, which leads to a reduction in the search time for the desired indicator and reduces the likelihood of operator errors when reading the result of diagnosis.

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Claims (2)

1. DEVICE FOR DIAGNOSTIC OF RELATED BLOCKS ELECTRONS, containing tolerance sensors, outputs connected to the inputs of the status code recognition unit, and Indicators, characterized in that, in order to reduce troubleshooting time and simplify the device, the status code recognition unit is made up of elements of software the number of diagnosed blocks, as well as from the switchboard and the first and second depnfrators, and the indicators are divided into two groups - indicators of the technical condition of the diagnosed blocks and indicators the technical state of the elements of the diagnosed blocks, the inputs of the state code recognition unit are connected to the information inputs of the switch and through the corresponding elements And to one of the inputs of the first decoder connected to the inputs of the indicators of the technical state of the diagnosed blocks and to the control inputs of the switch, the outputs of which are through the second decoder connected to the inputs of indicators of the state of the elements of diagnosed blocks. 9 (114 SU ™ 1121651 .1121.651 2. The device according to π. 1, with the fact that the first and second decoders are made on the basis of a triangular resistive-diode matrix, in which each of its outputs is connected through a resistor to the output of the power source, and each input through a corresponding diode included in the non-conductive direction is connected to the corresponding output of the matrix and through the corresponding element NOT to the cathode of the corresponding diode, each of which is installed on the side of the resistors only up to the main diagonal of the matrix.