SU956964A2 - Magnetostrictive differential displacement converter - Google Patents

Description

ohm pulse read power amplifier, RS trigger, the R input of which is connected to the output of the write pulse generator, and the S input of the output driver amplifier of the read pulse, oscillation frequency generator 5, two coincidence circuits, the first inputs of which are connected to the output of the generator exemplary The second input of the first coincident circuit is connected to the output of the countable Yu rigger, and the second input of the second coincidence circuit is connected to the output of the RS flip-flop, a reversible pulse counter, the inputs connected to the outputs of the corresponding circuits is provided with a fixed reference coil for reading with permanent magnets, a second damper placed on the conductor from the reference coil of the readout, an input connected to it by a reference amplifier Shaper of pulse read-read, an additional TlS trigger, the S input of which connected to the output of the reference amplifier — 25 l pulses of readout and to the S-input of the counting trigger, and its R-input is connected to the S-input of the RS flip-flop and connected to the output of the additional RS flip-flop and connected in series There is a matching circuit: the second input of which is connected to the generator output of the reference frequency, a pulse counter and a ratio meter, the second input of which is connected to the output of the reversible counter-35 pulse generator.

The drawing shows the block diagram of the Converter.

The magnetostrictive displacement transducer includes a co-string 1, a fixed excitation coil 2, a moving receiving coil 3, a fixed reference 4 counting coil, dampers 5 and 6 placed at the ends of the 45-pro water 45, permanent magnets 7, 9, clock generator 10 , the output connected to the input of the imaging unit 11 write pulses, the output of which is connected to the stationary excitation coil 2, the ch amplifier shaping 12 read pulses, the input connected to the moving receiving coil 3, RS-trigger 13, R- the stroke of which is connected to the output of the write pulse generator 11, the S input is the output of the pickup amplifier 12 read pulses, auxiliary trigger 14, R-BXOjCtoM (Connected to the output of the pickup amplifier 12 read pulses, generator 15 exemplary 0 frequency , matching circuits 16 and 17, the first inputs of which are connected to the output of an exemplary frequency generator 15, the second input of the first matching circuit 16 is connected to the output of the RS-flip 65

Gera 13, and the second input of the additional matching circuit 17 is connected to the output of the additional trigger 14, a reversible pulse counter 18, inputs connected to the outputs of the respective circuits 16, and 17 matching, the reference amplifier forming the read pulse 19, the input connected to the reading reference coil 4, counting RS flip-flop 20, whose S-input is connected to the output of the reference amplifier -former 19 read pulses and to the S-input of the trigger 14 and its lR-input is connected to the R input of the RS-flip-flop 13, to the output of the counting RS-flip-flop 20 connected connected successively, a coincidence circuit 21, the second input of which is connected to the output of the exemplary frequency generator 15, a pulse counter 22 and a ratio meter 23, the second input of which is connected to the output of the reversible pulse counter 18.

The Converter operates as follows.

The clock generator 10 triggers a write pulse shaper 11, which feeds a current pulse into the excitation coil 2, under the action of which an ultrasonic wave is propagated along the conductor 1 at a speed due to the direct magnetostrictive effect due to the direct magnetostrictive effect. V.

At the same time, a pulse from the clock generator 10 converts the RS-flip-flops 1-3 and 20 into a single state, the circuits 16 and 21 of the match open and the pulses from the generator 15 of the exemplary frequency arrive at the pulse counter 22 and the summing input of the reversible pulse counter 18 pulses.

The wave propagating from the right along the sound line 1 reaches the receiving coil 3 and induces an emf in it, which, after a corresponding amplification and shaping by the amplifier of the read 12 pulse, switches the RS flip-flop 13 and the additional flip-flop 14. RS-flip-flop 13 closes the matching circuit 16 and switches to the summing input of the reversible counter 18 pulses. will enter the pulse N, proportional to the distance between the excitation coil 2 and the receiving coil 3

X o dx

fci

- the distance between the excitation coil 2 and the receiving coil 3 in

Claims (1)

initial STATE} is the reference distance between the excitation coil 2 and the readout support 4; - the measured frequency is moved to the generator 1 exemplary frequency. The sign and X depends on the direction n of the displacement, and the plus sign corresponds to the case shown in the drawing. The additional trigger 14 opens the coincidence circuit 17, and the pulse frequency pulses begin to post to the subtracting input of the reversible pulse counter 18 pulses. Spread further, the wave reaches the fixed reference coil 4 of the readout, it induces an emf in it which: after appropriate clamping and formation of the reference amplifier by the former 19, switches RS-tr ger 20 and flip-flop 14. The last closes the matching circuit 17, and recalculates the pulses by reversing counter 18. the pulses stop. Its subtractive input will receive N, j pulses proportional to the distance between the receiving coil 3 and the reference coil 4 of the readout X TLH. V-V-FO After the measurement is completed in a reversible pulse counter 18, the recorded number VNn-Na. RS RS-flip-flop 20 closes the coincidence circuit 21, and in the pulse counter 22 is recorded the number Ng proportional to the reference distance N f The output value is ratio. , k {. As can be seen from the obtained expression, the transducer provides registration of the direction of the measured displacement, and also provides high accuracy in the measurement. The use of a converter allows to measure not only the magnitude of displacement, but also its direction with high accuracy and speed. Invention Formula Magnetostrictive Displacement Transducer St. 747812, characterized in that, in order to increase accuracy and speed, it is equipped with a fixed reference coil for reading with a permanent magnet, a second damper placed on the conduit from the reference read coil connected to it by a reference read pulse driver, an additional RS- a trigger whose S-input is connected to the output of the reference read-pulse amplifier and to the S-input of the counting trigger, and its R-input is connected to the S-input of the RS-flip-flop and connected to the output of the additional RS-tr an igger and connected in series by an additional coincidence circuit, the second input of which is connected to the output of an exemplary frequency generator, a pulse counter and a ratio meter, the second input of which is connected to the output of a reversible pulse counter. Sources of information taken into account in the examination 1. USSR author's certificate 747812, cl. G 01 B 7/00, 1978 (prototype). cb -Sp at 23