Supersonic vibrator with means for detecting vibrating speed

Details Supersonic vibrator with means for detecting vibrating speed Supersonic vibrator with means for detecting vibrating speed

1976-04-28

1977-12-27

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310325, H01L 4104

Patent

active

040656870

ABSTRACT:
A supersonic transducer including means for detecting its vibrating speed and for changing the frequency of the energizing current in response thereto. This invention utilizes the property that when an electrostrictive vibrator is vibrated resonantly, its dynamic admittance varies depending upon the difference in its stress distribution. The electrostrictive vibrator is divided into portions of large and small stresses to cancel the applied brake currents. Simultaneously, a signal is derived that is proportional to the difference of the dynamic currents so as to provide an effective energization by detecting the resonant frequency of the vibrator in order to automatically adjust the applied frequency of the supersonic transducer.

REFERENCES:
patent: 1912213 (1933-05-01), Nicolson
patent: 2616223 (1952-11-01), Jonker
patent: 2848672 (1958-08-01), Harris
patent: 2849075 (1958-08-01), Godby
patent: 3117768 (1964-01-01), Carlin
patent: 3813616 (1974-05-01), Antonevich

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