Acoustic delay surface wave motion transducer systems with enhan

Details Acoustic delay surface wave motion transducer systems with enhan Acoustic delay surface wave motion transducer systems with enhan

1975-03-03

1976-02-24

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

73517R, 310 84, 310 85, 310 98, 333 30R, H01l 4108

Patent

active

039406369

ABSTRACT:
Transducer devices employing relative changes in the acoustical propagation characteristics of surface waves traveling on opposite surfaces of a thin elastic cantilever beam yield a measure of the degree of flexing or surface strain of the elastic member. A multiplexed phase comparison loop and signal processing circuit alternately cooperates with the opposite surface waves of the transducer to supply a digital output proportional to strain and relatively free of drift, mode locking, and other spurious interactions.

REFERENCES:
patent: 3848144 (1974-11-01), Schissler
patent: 3858064 (1974-12-01), Schissler
patent: 3878477 (1975-04-01), Dias et al.
patent: 3888115 (1975-06-01), Schwartz

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