Transducer having piezoelectric film arranged with alternating c

Details Transducer having piezoelectric film arranged with alternating c Transducer having piezoelectric film arranged with alternating c

1976-04-30

1977-11-01

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, 310367, H01L 4104

Patent

active

040567427

ABSTRACT:
A transducer of the type converting between electrical and mechanical energy by means of the piezoelectric effect in a supported sheet of uniaxially oriented, electrically polarized thin high polymer film such as polyvinylidene fluoride, having surface electrodes thereon for connection to an electrical circuit. The transducer is characterized by an arrangement of the piezoelectric film into a series of elongate curved cylindrical segments of alternating sign of curvature, with the surface electrodes on the film being divided in selected locations between adjacent segments. A useful level of elastic stability is achieved without using a static pressure difference on the film, good electromechanical coupling is attained, and the individual transducer elements formed by the divided surface electrodes may be usefully interrelated electrically to substantially cancel even order harmonic distortion and enhance linearity of operation.

REFERENCES:
patent: 3781955 (1974-01-01), Laurinenko
patent: 3792204 (1974-02-01), Murayama et al.
patent: 3816774 (1974-06-01), Ohnuki et al.
patent: 3832580 (1974-08-01), Yamamuro et al.
patent: 3973150 (1976-08-01), Tamura et al.
patent: 3978353 (1976-08-01), Kinoshita

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