DEVICE FOR REMOTE TESTING OF PIEZOELECTRIC TRANSDUCER Russian patent published in 1995 - IPC

FIELD: instruments. SUBSTANCE: device has oscillator 1, frequency divider 2, electronic switch 3, commutator 4, symmetric transformer 5, detector 6, commutator 7, flip-flop 8, saw-tooth voltage generator 9, amplifier 10, shapers 11 and 14, phase detector 12, phase-shift circuit 13, frequency meter 15, sine-shaped signal shaper 16, tuning capacitors unit 17. Introduced elements and new connections between device elements provides elimination of generation of fault information when tested piezoelectric transducer works well. This device is designed for piezoelectric transducers which are used in board equipment. Working conditions of piezoelectric transducer are detected by presence of resonance in its sensitive element and correspondence of this resonance to nominal value. EFFECT: increased precision of remote testing. 1 dwg