SU1156011A1 - Device for checking the state of engineering object - Google Patents

Abstract

1. DEVICE FOR MONITORING THE STATUS OF TECHNICAL OBJECTS, containing an indicator of good condition, the first key connected by the information input to the feedback input of the device, the control input to the single output of the Schmitt trigger, and the output from the output feedback of the device and the output of the second key connected by the control input with the zero output of the Schmitt trigger, as well as the number of monitored parameters of the N threshold sensors connected to the inputs of the device, and the outputs to the first inputs of the decoder and to the inputs of elements NOT connected by outputs to the second inputs of the decoder connected to the M outputs to the inputs of fault indicators, characterized in that, in order to expand the functionality of the device, a control mode setting block, an impact register and the first AND element connected to the first input with the output of the threshold sensor of the first input of the device, the second input with the output of the element NOT the input feedback circuit of the device, and the output with the input of a Schmitt trigger connected to the zero output to (L + 1) My input to the impact register associated with the L outputs with the L command outputs of the device, (L + 1) command output — with the information input of the second key, L inputs — with the command outputs of the control mode setting unit connected with the input to the () -M output of the decoder, and information output with the input of the indicator of good condition. 49 2. The device according to claim 1, which is that the control setting task block contains a command generator, third keys, a command decoder, a switching node, a waiting multivibrator, a fourth key, an element of one-sided conduction, the first and second differentiating chains , the start-stop node 05 and the second element AND connected by the output to the information output of the control mode setting unit, the first input to the high-order output of the command decoder and to the control input of the fourth key connected by the information input output of the first differentiating chain connected by the input to the output of the control mode setting unit to the second input of the second element And to the input of the one-way conduction element connected by the output to the output of the start-stop unit and to the input of the second differentiating chain connected to the output

Description

the input of the command driver, connected by the second input to the output of the fourth key and to the output of the waiting multivibrator, connected to the control inputs of the third keys connected to the information inputs to the outputs of the command driver, and the outputs to the inputs of the command decoder, connected to the outputs of the switching node associated with the outputs from the command outputs of the control mode setting unit.

one

The invention relates to technical diagnostics and can be used to detect faults in radio electronic objects having arbitrary connections between its functional elements.

A device is known that contains a group of sensors for tolerance or threshold monitoring of object parameters, a decoder of object state codes with NOT logical elements at each input, object state indicators, and the sensors are directly connected to the decoder inputs whose outputs are connected to indicators. The device implements a combination search for the failed functional elements of the control object (OK) 11.

However, this device does not allow to determine the place of failure among the elements OK, covered by the feedback circuit (OS),

The closest to the invention to the technical essence is a device containing a group of sensors for the tolerance control of OK parameters; a group of logical elements NOT, a decoder of the status codes OK, status indicators OK; Schmitt trigger, the source of reference signals of the OS circuit and two keys, each sensor output being connected to the decoder input and the element NE input, the output of which is connected to the decoder input, the output of which is connected to indicators, the Schmitt trigger input is connected to one of the decoder outputs and the outputs with the control inputs of the keys, the information input of the first of which is connected to the outputs OK, the output with the input OK, and the output of the second KL, whose information input is connected to the output of the source of the reference signals of the OC circuit. The device allows you to diagnose functional elements OK, covered by a chain of OS L2II.

The disadvantages of the known device are the impossibility of diagnosing an object if it is necessary to apply stimulating effects to its external inputs, switching on the source of reference signals

into the operating system circuit with malfunctions of the functional elements of the control system, not covered by the operating system circuit, which leads to an increase in energy costs during the diagnostic operation, i.e. to reduce the efficiency of work. The purpose of the invention is to expand the functionality of the device.

This goal is achieved by the fact that in a device for monitoring the state of technical objects, containing an indicator of good condition, a first key connected by an information input to an input of a feedback circuit of a device, a control input — with a single Schmitt trigger output, and an output — with an output feedback device and

with the output of the second key connected by the control input with the zero output of the Schmitt trigger, as well as by the number of controlled parameters N threshold sensors connected by inputs to the device inputs, and outputs to the first inputs of the decoder and to the inputs of the elements NOT connected to the outputs of the second inputs decoder connected M outputs

to the inputs and fault indicators, entered, the control mode setting unit, the action register and the first element I. associated with the first input with the output of the first-input threshold sensor

device, the second input - with the output

the input element NOT of the device’s feedback circuit, and its output — with the input of a Schmitt trigger connected by zero output to the (L + 1) -My input of an impact register connected to L outputs with L command outputs of the device, C.) - m command output - with the information input of the second key L inputs - with the command outputs of the control mode setting unit connected with the input to the (M +1) code of the double framer, and the information output with the input of the serviceable state indicator.

The control mode task block contains the command driver, the third keys, the command decoder, the commutation node, the waiting multivibrator, the fourth key, the one-way conduction element, the first and second differential chains, the start-stop node and the second AND element connected to the output to the information you move the control setting task block, the first input - to the higher bit of the output of the command decoder and to the control input of the fourth key, connected by the information input to the output of the first differential chain, is connected input to the output of the control setting task block, to the second input of the second element I and to the input of the one-way conduction element connected by the output to the output of the start-up node and to the input of the second differentiating chain connected by output to the first input of the driver of the command connected to the fourth input of the fourth of the key and to the output of the waiting multivibrator connected with the output to the control inputs of the third keys connected by the information inputs to the outputs of the command driver, and the outputs to the inputs of the decoder mand, connected to the outputs of the switching node inputs associated with the outputs from the command outputs of the control mode setting unit.

FIG. 1 shows a block diagram of the device; in fig. 2 is a block diagram of the control mode setting and register of the action in FIG. 3 is a flow chart of a switching node.

The device contains (FIG. 1) a part of the test object not covered by the feedback circuit 1, functional elements 2, 3 and 4 of the test object covered by the feedback circuit, threshold sensors, elements HE 6-6f, decoder 7, fault indicators 8, the condition indicator 9, the first element And 10s Schmitt trigger 11, the first 12 and second 13 keys, the control mode setting unit 14, the influence register 15.

The control mode setting task contains the switching node 16, the second element AND 17, the command decoder

18, first differentiating chain

19, the third keys, the fourth key 21, the waiting multivibrator 22, the command generator 23, the second differentiating chain 24, the start-up node 25, one-sided conduction element 26. The switching node consists of diodes 27 connected as shown in FIG. 3 (four inputs and outputs are shown

Impact register 15 consists of impulse generators 28.

The device makes it possible to diagnose an object in a combination way, in particular, in several steps. The principle of its operation is as follows.

Initially, known combinations of external influences OK are assumed, the reactions to which individual groups of functional elements make it possible to unambiguously judge the health of the latter. The sequence in which combinations are fed to the external inputs of the OK is also known.

The device works in the following way.

The diagnostic algorithm is provided by block 14.

The first diagnostic step starts by pressing the Start button at start-stop node 25 containing (not shown) an RS flip-flop using one output, and the inputs S and R, respectively, via two push-button Start and Stop switches with short-circuit contacts moments are supplied as difference of type 1. With the push of the Start button, a difference of type 1 is applied to the input S of the flip-flop (the trigger is initially in the zero state) and translates it into a single state. In this case, a single 5 differential through an element of one-sided conduction (diode) 26 enters the first differentiating chain 19 and impulses from differentiating the leading edge of the differential that passes through the open key 21 in the initial state, the continuous multivibrator 22 and the command generator 23 start. The use of a trigger in the switching element 25 prevents the multivibrator 22 and the command generator 23 from being triggered by: with the possible repeated pressing of the Start button at the beginning of the diagnostics process. When a mule is triggered, the Tivibrator 22 forms a short-term and a pulse that locks the keys 20 for the duration of transition processes in the command generator 23, which is an asynchronous binary counter, to generate a code, trigger chain states are used. When the first trigger of the command generator 23 is triggered, at the first output of the last one, O signals appear, thus the code of the first command is generated, which, after unlocking the key 20, results in a return. the multivibrator 22 in the initial state, is applied to the inputs of the decoder 18 commands. As a result of decrypting the code of the first command, a signal 1 appears at the first output of the command decoder 18, which arrives at one of the inputs of the switching unit 16, which is a gate matrix, which, when acting on one of its inputs 1, to receive at its outputs a certain combination of signals 1 and O. Therefore, at the output of switching unit 16, a combination of control signals 1 and O for the action register 15 occurs. Signals 1 act on the corresponding generators of R impulses 28 registers of actions, translating them into generation stop. The first combination of standard signals thus obtained is led to specific inputs O.K. Predetermined combinations of input effects OK and their sequence of supply (for the variant shown in Fig. 3); 16 first: 1st and 4th generators / TT 1 / rt (1-4); the second: 1st, 2nd and 4th generators (1-2-4); third: 2nd and 3rd generators (2-3); fourth: 1st and 3rd generators (1-3). In the first diagnostic step, a code combination 100 is applied to the decoder 18, under the influence of which a signal 1 is generated at the first output and, therefore, at the first input of the switching unit 16, which, through diodes 27 and 27d, is applied to the generators 28 and 28 ;, , transfers them to the generation state by acting on the switching element in the power supply circuit of the corresponding generator (not shown). Due to the opposite polarity of the inclusion of the diodes 27, 27j, as well as 27g relative to the 1st input, the signal 1 acting on the input 1 of the switching node 16 does not pass to its other outputs. Thus, the required combination of input actions OK - 1-4 is included, which connects .1ts to its corresponding inputs. The signals applied to the inputs OK cause the reactions of its corresponding functional elements, which are sensed by sensors 5, which convert their value into a signal (parameter OK) or O (parameter not OK). Thus, a separate diagnostic step allows detecting the fault location in that part of the OK, whose operation is uniquely determined by the combination of input actions applied to the object inputs (in the particular case, combination 1-4). If this part is OK, then the outputs of sensors 5 that control this part of the object form signals 1 (respectively, at the outputs of adjacent elements 6 NOT signals O) and on the (M + 1) -th output of the remoteframer 7. When the part of the object is in good condition, signal 1, tested at a separate step, comes from the (M + 1) -th output of the decoder 7 to block 14 to the input of the first differentiating circuit 19, as a result of which the pulse from the differentiation of the leading front j passes through the open key 21, launches with a standby multivibrator 22, and the first rigger commands shaper 23 is transferred to its initial state, wherein the n in single state is transferred second trigger. Thus, only in the second bit of the generated command code to turn on the next combination of input signals OK will be 1, and in all the rest 0 (in the specific service bits of 010). At the same time, as a result of blocking the keys 22 with the pulse of the multivibrator 22, the command code of the previous step is removed from the input of the command decoder 18, which leads to the removal of the control signals 1 from the corresponding inputs of the register 15, which stop generating the signals of the previous step (1-4 ) and at the (M + 1) th output of the decoder 7, the signal O is again formed, while diode 26 prevents this differential from passing to the second differentiating chain 24, which ensures stability of operation of the command generator 23. After returning the multivib At first, a new command code (specifically 010) is applied to the initial state 22 via the public keys 20 to the inputs of the decoder 18 commands and all the above processes with OK functional elements that are checked by this input combination (1-2-4), are repeated. The entire process of diagnosing an object is continued until all available combinations of input signals are used (specifically, 1-4, 1-2-4.2-3, 1-3). If the last step does not indicate a malfunction of the object, then signal 1 appears at the output of element 17, since one input receives 1 s (M + 1) -th output of the decoder 7, and the second input receives a signal 1 s K-th output of the decoder 18 commands, which is controlled by the inclusion of the last combination of input signals OK. In addition, the signal 1 from the K-th output of the command decoder 18 is simultaneously applied to the control input of the key 21 and translates it into the closed state, which subsequently prevents the multivibrator 22 and the command generator 23 from triggering. Therefore, if (m +1) th output of the decryphto 7 signal appears 1, then the multivibrator 22 and shaper 23 will remain in the same state. The signal G from the output of element 17 I is fed to the input of the indicator 9. in good condition, KOTOpbDi is turned on and signals OK in good condition and the end of its diagnosis. Diagnostics ends by pressing the Stop button at start-stop 25, as a result of which a single voltage drop is applied to the input R of the flip-flop, which then returns to the initial state, at which the potential / quits zero at the single output. P1 pulse from differential differentiation from high level to low due to circuit 24, command generator 23 is transferred to its initial state, in which its outputs will be only signals O and, therefore, control signals from the inputs of the register will be removed. 15. At the same time, the generators of register 15 stop the supply of influences to the inputs OK, and the indicator 9 of the healthy state is turned off. The diagnostic process is complete. In the event of an OK fault, at some diagnostic step, the decoder 7 will react to the failure of the functional element. At the same time, on one of the outputs connected to one of the 8) -8m fault indicators, a signal 1 appears, which turns on an indicator that signals the failure of one of the M functional elements OK. Since in this case, the signal (O) of the decoder 7 (| Y + 1) -m is affected by the signal O, the alternate combination of input signals OK can only be given after the elimination of the detected malfunction (i.e., when decoder 7 again will be signal 1). In addition, when OK is OK, when signals 5 are at the outputs of sensors 5, 1 is NOT at signals at elements 6, and signal O is at the output of element 10, since one input is connected to the output of sensor 5 and the second move output of element 6}. NOT. This allows 9

The Schmitt trigger 11 is in such a state that the key 12 is closed and the key 13 connected via the information input and the output to the OS circuit of elements 2, 3 and 4 of the object is open. In this case, the (m + 1) -th output of the decoder 7 is affected by the signal 1, which is a sign of the health of the object.

If the OK fault appears in any of the elements 2, 3 and A covered by the OS circuit, then the outputs of the sensors 5, which control the outputs 2, 3 and 4 of the object, receive an O signal, and the outputs of the sensors 5, which control other outputs, Signal 1 will act. In this case, the first input of element 10 also receives signal 1, since this input is connected to the output of the sensor, which controls the 2nd output OK, from where the normal signal goes directly to elements 2, 3 and 4 covered by the circuit OS

The second input element 10 And also receives a signal 1 from the output of the element 6 NOT, the input of which is connected to the output of the sensor 5, which controls the output of the functional element 4 (2nd output OK, where the signal when any of the elements 2,3 or 4 fails and therefore, the signal 0 is generated at the sensor output, and therefore, the signal 1) will NOT be output at the output of the element adjacent to it.

As a result, at the output of element 10 And a signal 1 is formed,

5601110

under the action of which the Schmitt 11 trigger changes its state to the opposite, the key 13 closes, the OS chain of the object is broken, and the key 12 5 opens, connecting the (1 -.- 1) -th output of the influence register to the (1 + 1) -th OK at the same time. At the same time, the voltage drop at the zero output of Schmitt trigger 11 is applied to

The 10 (jL + 1) -My (specifically the 5th) pulse generator transfers it to the generation state, with the result that the standard signal through the open key 12 is sent to the (1 + 1) -th input OK, 15, which allows separate diagnostic operation to deduce the place of failure among the elements of the object covered by the OS chain.

Application of the proposed device:

20 significantly expands the ability to diagnose technical objects using the combination method as compared to the basic device, which is

five . prototype, and the possibility of diagnosing functional elements OK, covered by an OS chain, only with faults of these elements, and not arbitrary, as in the prototype, allows to reduce energy costs, thereby improving the efficiency of the device.

In addition, with step-by-step diagnostics of individual typical structures, it is possible to significantly simplify the decoder circuit by reducing the number of bits with the OK state code.

/ fL L + i

Claims (2)

1. DEVICE FOR MONITORING THE STATE OF TECHNICAL OBJECTS, containing a working condition indicator, the first key connected by the information input to the input of the feedback circuit of the device, the control input to the single output of the Schmitt trigger, and the output to the feedback output of the device and the output of the second key, associated control input with zero output of the Schmitt trigger, as well as by the number of monitored parameters N threshold detectors connected to the input device inputs and ₄ outputs - to the inputs of the first decoder and WMOs there are NOT elements connected by outputs to the second inputs of the decoder, connected by M outputs to the inputs of the fault indicators, characterized in that, in order to expand the functionality of the device, a control mode setting unit, an action register, and the first AND element connected to the first input with the output of the threshold sensor of the first input of the device, the second input with the "output of the NOT element of the input of the feedback loop of the device, and the output with the input of the Schmitt trigger, connected by a zero output to the (b + 1) -th input of the register and the effects associated with L outputs with L command outputs of the device, (L + 1) command output - with the information input of the second key, L inputs - with the command outputs of the control mode setting unit connected by the input to the (H + 1) -th decoder output, and an information output with an input of an indicator of a working condition. 2. The device according to claim 1, wherein the control mode setting unit comprises a command generator, third keys, a command decoder, a switching node, a waiting multivibrator, a fourth key, a one-way conduction element, the first and second differentiating chains, a node start-stop and the second element And, connected by the output to the information output of the control mode setting unit, by the first input - to the high-order bit of the output of the command decoder and to the control input of the fourth key connected by the information input to the output of the first differentiating circuit connected to the output of the input block assignment control mode to the second input of the second AND gate and to an input of one-way conduction element is connected to the output · output node start-stop and the entrance of the second differentiating circuit connected with the output perSU 1156011> the input of the command shaper connected by the second input to the output of the fourth key and to the output of the standby multivibrator connected by the output to the control inputs of the third keys connected by information inputs to the outputs of the command shaper, and the outputs to the inputs of the command decoder connected by the outputs to the inputs of the switching node, associated with the outputs from the command outputs of the control mode setting unit.