SU868776A1

SU868776A1 - Device for detecting faults of an object

Info

Publication number: SU868776A1
Application number: SU792833541A
Authority: SU
Inventors: Борис Львович Паценкер; Алексей Григорьевич Хильченко; Валерий Петрович Соколянский; Валерий Леонидович Костин; Владимир Львович Склярский
Original assignee: Харьковский авиационный институт им. Н.Е.Жуковского
Priority date: 1979-10-23
Filing date: 1979-10-23
Publication date: 1981-09-30

Description

1one

Изобретение относитс к диагностике целостности конструкций, например авиационных, автомобильных и т.п., при исследовании их долговременной прочности.The invention relates to the diagnosis of the integrity of structures, such as aviation, automotive, etc., in the study of their long-term strength.

Известно устройство дл контрол параметров объекта, содержащее датчики , генератор тактовых импульсов, запомнигиощее устройство, коммутатор, блок управлени и блок регистрации. Kpovts того, в устройство введены ключевые элементы-, логический блок,блок эталонного напр жени и блок нульоргана .A device for monitoring object parameters is known, comprising sensors, a clock pulse generator, a memory device, a switch, a control unit and a recording unit. In addition, the key elements, the logic block, the reference voltage block and the nuorgan block are entered into the device.

Известное устройство позвол ет фиксировать не только отклонение измер емого параметра от нормы, но и измер ть величину этого отклонени , дл чего в данном устройстве одно и то же коммутирующее устройство используетс как в режиме контрол , так и в режиме измерени 1.The known device allows to fix not only the deviation of the measured parameter from the norm, but also to measure the magnitude of this deviation, for which the same switching device is used in this device both in the control mode and in the measurement mode 1.

Однако это устройство не позвол ет определ ть цикл нагружени , в котором возникла неисправность (например , трещина) и процесс ее развити при испытани х, что снижает полноту , получаемой информации, а, следова|тельно , и достоверность диагности ки неисправностей.However, this device does not allow to determine the loading cycle in which a malfunction occurred (for example, a crack) and the process of its development during testing, which reduces the completeness of the received information, and, consequently, the reliability of diagnostics of malfunctions.

Известно также .устройство дл диагностики неиспраБНОстей технических объектов, содержащее датчики, коммутатор, блок управлени и запоминающее устройство. Помимо этого, в данное устройство введены матричные распределители и пороговый элемент .It is also known to have a device for diagnosing the malfunction of technical objects, comprising sensors, a switch, a control unit and a memory device. In addition, matrix distributors and a threshold element are introduced into this device.

Известное устройство позвол ет не только фиксировать место возникновени , но и определ ть характер неисправности, путем записи соответствующих -признаков в запоминающее устройство 2.The known device makes it possible not only to fix the place of origin, but also to determine the nature of the malfunction, by recording the corresponding signs in the memory 2.

Однако данное устройство не позвол ет определить в какой момент работы испытываемого объекта возникла неисправность и зарегистрировать процесс ее развити , что снижает полноту инфopмaции а, следовательно , и достоверность диагностики неисправностей .However, this device does not allow to determine at what point in the operation of the test object a malfunction occurred and to register the process of its development, which reduces the completeness of the information and, consequently, the reliability of diagnostics of malfunctions.

Claims

Closest to the present invention, there is a device for detecting faults in full-scale structures, comprising sensors connected via a switch to the input of a breakaway detecting unit, a clock generator, a comparison unit 30 and a display unit. In addition, a device for determining the sensor break point is inserted into the device, which contains a pulse generator, a sensor capacitance measuring node, and a converter for the number of pulses into the coordinate of the break point. In addition to the reference node, the block for determining the moment of sensor breakage contains a counter for the number of polling cycles and a counter for the number of trials 33. However, the known device has low noise immunity due to the use of a capacitive measuring device, which leads to a decrease in the reliability of the fault determination. In addition, the known device does not allow determining on which cycle of loading the sensor was destroyed and to follow the process of malfunction development, which reduces the completeness of the information received and the accuracy of structural strength assessment, and, consequently, the accuracy of diagnostics of malfunctions. The purpose of the invention is to increase the reliability of the control. , .. The goal is achieved by the fact that the device for monitoring object faults, containing a pulse generator, a display unit, a comparison unit, fault sensors connected via a switch to the input of the breakaway detection unit, a memory unit, a cycle counter, two address counters are entered the scramble register and the control unit connected by the first input to the output of the breakaway detection unit, BTOPEJM input to the output of the pulse generator, the third input to the output unit of the comparison unit, the first output to the input of the first counter ka address, and the second output - with the inputs of the second address counter and address register, the outputs of which are connected to the first input of the memory unit connected by the second input to the output of the cycle counter, output - to the first inputs of the display unit and the comparator, and the third input - with the second inputs of the comparison unit, the display unit, the output of the first address counter and the switch. The drawing shows a block diagram of the proposed device. The device contains fault sensors 1, switch 2, breakaway detection unit 3, first address counter 4, control block 5, pulse generator 6, comparison block 7, second address counter 8, address register 9, memory block 10, 11 cycles counter , block 12 display. The device works as follows. In the case of continuous polling of a given array of sensors 1, the address counter 4 sequentially outputs the address codes of the sensor to switching unit 2, which connects the selected sensor to block 3 for determining the moment of break. The breakaway detection unit 3 probes the integrity of the sensor by determining the presence of current in the measuring circuit. If the circuit is intact, then the control unit 5, by signaling the block 3 for determining the moment of break, passes the next clock pulse from the generator 6 pulses to the input of the counter 4 addresses. Counter 4 of the address increases its content by 1 and, using switch 2, connects the next sensor 1 from the array of sensors to block 3 for determining the moment of break. If there is no current through the sensor, it means it is destroyed, and the current value of the counter 4 and the counter of 11 cycles are recorded in the memory block 10. For this, the signal from the control unit 5 disables the address register 9 from the address inputs of the memory unit 10. A second counter 8 of the address is connected to these inputs, with which all cells of the memory block 10 are sequentially polled. If, in the process of polling the cells of the memory block 10 using the second counter 8 of the address, the comparison block 7 does not generate a comparison signal, then the damaged sensor was encountered for the first time. In this case, the control unit 5 records the current address of the sensor from the counter 4 of the address and the indication of the counter 11 cycles in the memory block 10. For this, the second counter 8 of the address is disconnected from the memory block 10, the register 9 of the address is connected, and the codes from the counters 4 and 11, i.e. at the same time, the number of the destroyed sensor and the number of the cycle in which it occurred are recorded. After registration, the code value in register 9 is incremented by one; those. The next cell of memory unit 10 is being prepared for registration. If the comparison unit 7 generates a comparison signal, then the address code of this sensor is already recorded in the 10pam block and the address is not recorded. In this case, the control unit 5 ensures the passage of a single impulse to the counter 4 of the address and the value of the address code of the interrogated sensors in the counter 4 is increased by one, i.e. the next sensor is connected. The increase in the content of the 1-cycle counter occurs according to signals from the adload of loads (not shown). The operation of the device and the accumulation of the addresses of the damaged sensors of the memory block 0 occurs until its full completion. After that, in block 12 of the display get a picture of the process. Damage development. Use of the proposed device Ensures the dignity of the control of faults by automatically recording the process of damage development. In addition, knowledge of the cycle number and the ability to analyze the process of development of faults allows us to more accurately estimate the long-term strength of the tested structures. Claims An apparatus for monitoring object malfunctions, comprising a pulse generator, a display unit, a comparison unit, fault sensors connected via a switch to the input of the breakaway moment detection unit, which, in order to increase the control accuracy, a memory block is inserted into it , a cycle counter, two address counters, an address register and a control unit connected by the first input to the output of the breakaway detection unit by the second input - to the output of the pulse generator, to the third input - to the output of the block and comparing the first vyhodoms input of the first address counter and the second output - the second inputs. an address counter and an address register whose outputs are connected to the first input of a memory unit connected by a second input to an output of a cycle counter, an output to the first inputs of a display unit and a comparison unit, and a third input to a second input of a comparison unit, a display unit, a switch and by the output of the first counter the sources of information taken into account in the examination of 1. USSR USSR Certificate No. 329528, cl. G 06 F 15/46, 1969.

2. USSR author's certificate 330456, cl. G 06.F 15/46, 1970.

3. Author's certificate "USSR 474276, cl. G 01 N 3/06, 1971 (prototype).