SU911166A1 - Device for mechanism condition diagnostics - Google Patents

Description

I

The invention relates to a measurement technique and can be used in acoustic diagnostics of mechanisms. The closest to the invention in its technical essence is a device for diagnosing the state of mechanics, containing three circuits with post-agglomeratedly connected functional wells, the first of which includes a vibration sensor, a driver, a first trigger, a first coincidence circuit, a reversible counter, a second trigger, and a second the coincidence circuit, the second circuit includes a detector, a second input connected to the output of the second trigger, a frequency converter, a selector, a second input connected to the output of the second trigger, and a counter. The third circuit includes a generator, output connected to the second input of the first coincidence circuit, and a frequency divider, output connected to the second input of the second coincidence circuit, reference sensor, the second input of the first of two triggers connected to the third input

the second coincidence circuit, the output of which is connected to the second input of the reversible counter Til.

A disadvantage of the known device is that the measurement accuracy is not high enough and due to the ambiguous determination of the time when the vibration pulse arises from the collision of parts of a kinematic pair, which is subject to the diagnosis of interference.

The purpose of the invention is to show accuracy.

The goal is achieved by the fact that the device is equipped with a temporary converter connected between the reference sensor and the first and second triggers, a memory unit connected between the reference sensor and the detector, connected in series by a switch and a filter unit connected

30, respectively, between the vibration sensor and the former, and the third trigger, the first input connected to the reference sensor, the second input to the second input of the filter, the second output of the former, and the third input of the time converter, and the output to the gate valve and the second input of the former, the second input of the time converter is connected with the vibration sensor and the second input of the memory unit, and the second output of it is connected with the second input of the transducer, and the third input of the memory unit is connected with the first input of the formyr. Fig. 1 is a block diagram of a device for diagnosing the state of mechanisms; in fig. 2 - voltage on the functional units of the device. . The device contains three circuits with serially connected functional units, the first of which includes vibrating sensor I, driver 2, first trigger 3, first match 4, reversible counter 5, trigger 6, and second hit 7. The second circuit includes cetecor &, the second input is connected with the output of the second trigger 6, the frequency converter 9, the selector 10, the second input connected to the output of the second trigger 6, and the counter 11. The third circuit turns on the generator 12 connected to the output. the first coincidence circuit 4, i, and the frequency divider 13, the output connected to the second input of the second coincidence circuit 7, the reference sensor 14. The second end of the first of two triggers is connected to the third input of the second coincidence circuit 7, the output is connected to the second one, m reversing input 5, a time converter 15 connected between the reference sensor 14 and the first 3 and second 6 flip-flops, a memory 16 memory connected between the reference sensor 14 and the detector 8 connected in series to the pegate / hum 17 and the filter block 18 included respectively between the vibro-sensor 1 and the driver 2, and the third trigger 19, the first input connected to the reference sensor 14, the second input to the second vco rrm of the filter unit 18, the second v1Code of the driver 2 and the third input of the time converter 15, and the output from the slide switch17 and the second input of the driver 2, the second input of the temporary heater 15 is connected to the vibration sensor 1 and the second input of the memory block 16 and its second output is connected to the W input of the switch 17, and the third input of the memory 16 is connected to the first output of the driver 2. In FIG. 2 shows the pulse from the reference sensor 14 {s (); initial impulses from vibrator 1 (5); the voltage at the output of the filter unit 18 when exposed to pulses from a vibration sensor) I (c); impulse from the second output of shaper 2 (g); the signal from the output of the second output of the time converter 15 (E) the signal from the output of the block ({mtl 18 when exposed to a signal from the second output of the time converter 15 (yii.) t impugs from the first output of the driver 2 (3) i signal from the output 16 memory (s); pulse from the first output of the time converter 15 (K); vmpul s at the output of the first trigger 3 (l); tension at the detector output 8 (m) | voltage at the output of the frequency generator 9 (c); pulse at the output of the second trigger 6 (p); the number of pulses recorded in the counter 11. (c). The operation of the pulse from the output of the reference sensor 14 to the first inputs of the trigger 19 and the time converter 15 and the second input of the memory 16 at the output of the third trigger 19. The signal that goes to the switch 17 and the second input of the driver 2 and controls them in such a way that the output of the vibration sensor I is connected to the input of the filter unit 18, and the output of the latter to the first input of the imaging unit 2. At the same time, the pulses from the sensors 1 and 14 are recorded by the time converter 15 and the memory unit 16 until eye with the second output of the generator 2 is not at Vits blanking pulse, i.e., through time t to + C, rnetjj is the gap sampling time; t is the settling time of the signal at block 18 (| льltrov. Cash. impulse is sent to the input of block 18 of the filter, the first input of the third flip-flop 19 and the third input of the time converter 15. At that, the flip-flop 19 switches, and its output is a signal arriving at the switch 17, and the second input of the generator 2 y | f 9 lt them so that Turns on the time of the temporary generator to the input of the filter block 18 through the second input of the switch 17, At the time of the arrival of the leading edge of the pulse from the second output of the generator 2, at the moment time t for the duration of the TQ of this pulse, the filter unit 18 is shunted, perseversing to 59

companion. With the arrival of the trailing edge of the mentioned pulse at the time of BpeMeHHtn in the time converter 15, an impulse prohibiting writing and allowing reading of the memory previously recorded in the converter 15 is generated. The converted signal from its second output goes through switch 17 to the filter unit 18 to the second input 2 s . The first output of the impulse by the althoptera of the equal duration of the curvature of the resonant frequency of the corresponding filter is fed to the first of the first trigger 3 and the third input of the memory block 16. The second input of trigger 3 and the first input of trigger 6 receive a signal from the first driver 2, With the arrival of the falling front from the first output of driver 2, at time t, the signal is read from the memory block 16, and the signal from the receiver 16 is detected output of memory block 16. At the moment t, at the moment of the signal maximum, the first output of the trigger 4 appears at the resolving potential I, and the output potential is the inhibitory potential O. The pulses from the generator 12 o'clock, through the first scheme 4 matches arrive at the first input of the reversing counter 5. With the arrival of the trailing edge of the pulse t4c of the first output of the time transform are l, a signal O is sent to the first output of the trigger 3, and a signal 1. to the third input of the second coincidence circuit 7 is sent to the second. At the start of the second trigger 6, the enabling signal 1 also appears, which passes to the second inputs of the detector 8 and the selector 1O and the first input of the second coincidence circuit 7. The first coincidence circuit 4, from time t, is closed, and the second circuit 7 is matched. opens up. By the time t in the reversible counter 5 records with the number

 ) tl "t1

where At is the time, which is determined from consideration of the effect of the tt-formed signal on filter block 18

N is proportional to the true value of the sampling time gap. From time Bd, the pulses from the output of the splitter are 13 frequencies with a frequency:, hertz is the chosen coefficient

11666

the divisions come through the second coincidence circuit 7 to the input of the reversible counter 5, which begins to count the number, and after a certain time

counter 5 returns to the zero state and at its output a pulse arrives at the first input of the trigger .- irepa 6, the output of which is at the moment

Time i, -1 o, a forbidden signal appears, closing the selector 10 and the second circuit 7 of the axis of the drops, and the detector 8 returns to zero composion. The duration is proportional to the sampling time of the gap, and the result recorded in counter 11 is proportional to the gap.

The invention provides improved measurement accuracy by increasing 2J. noise immunity.

Claims (1)

Invention Formula A device for diagnosing the state of mechanisms, containing three circuits with sequentially connected functional units, the first of which is the ACID sensor, the former, the first trigger, the first drop circuit, the revisit counter, the second trigger, and the second coincidence circuit, the second circuit. The detector, the second input connected to the output of the second trigger, frequency npeo6pa30BaTejb, selector, second input connected to the output of the second trigger, and a counter, the third circuit includes a generator, output connected to the BTOpbiM input of the first circuit matches, and the frequency divider, the output of the ry with the second inlet of the second coincidence circuit; reference sensor; the second output of the first of the two flip-flops is associated with the input of the second coincidence circuit, the output of which is connected to the second input reversible counter, that is, with the aim of increasing the measurement accuracy, it is equipped with a temporary transducer connected between the reference sensor and the first and second by triggers, a memory unit connected between the reference sensor and a tsector which are connected in series by a switch n a filter unit connected 7 respectively by a vibrator and a driver, and a third trigger, the first input connected to the reference gate, the second input - to the second input of the obvpoB , the second output of the driver and the third inlet of the time converter, in the output with the switch and the second inlet of the driver, the second entrance of the time converter is associated with the vibration 668 center and the second inlet flash memory vyhots its second - to a second vhoaom perklyuchatel, and a third memory unit vhoa soetsinen first vyhotsom shaper. Sources of information taken into account phy examination I. USSR author's certificate t 73674O, cl. G, 01 M 15/00, 1978 (prototype).