MAGNETOSTRICTION MOTION-TO-CODE TRANSDUCER Russian patent published in 1997 - IPC

FIELD: automatic control and measuring equipment. SUBSTANCE: two ultrasonic waves are generated by the ultrasonic pulse exciting element and reference ultrasonic pulse exciting element consisting of two opposite-magnetized magnets positioned at a distance covered by ultrasonic wave during a time period equal to the recording pulse length; the counter is triggered by electromagnetic induction set up by an excitation current pulse, and the offered electronic measuring circuit accomplishes generation of time equivalents and coupling of device with a microcomputer. The position of the object of monitoring is determined according to the algorithm of differential-ratiometric conversion. EFFECT: enhanced accuracy, conversion range and simplified design. 2 cl, 2 dwg