Kinetic sensor employing polymeric piezoelectric material

Details Kinetic sensor employing polymeric piezoelectric material Kinetic sensor employing polymeric piezoelectric material

1976-07-19

1977-09-13

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310363, H01L 4104

Patent

active

040485269

ABSTRACT:
A motion detector that includes one or more sensing units fastened by at least one end to an interior portion of a housing. The sensing units are flexible so that they readily bend in response to movement of the detector, and a small weight is mounted on each sensing unit to accentuate such bending. Each sensing unit includes a thin strip of poled, polymeric piezoelectric material having planar surfaces. Conductive electrodes are carried on only the portions of such surfaces adjacent the end (ends) of the sensing unit fastened to the housing. An electronic circuit is connected across the conductive electrodes for sensing electrostatic charges that are produced by the bending of the piezoelectric material of the sensing units and for providing a signal indication of such bending.

REFERENCES:
patent: 2808524 (1957-10-01), Feinstein
patent: 3030606 (1962-04-01), Harris
patent: 3241373 (1966-03-01), Ricketts et al.
patent: 3374663 (1968-03-01), Morris
patent: 3832580 (1974-08-01), Yamamuro et al.

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