Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1990-05-08
1993-02-16
Dzierzynski, Paul M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
333144, H03H 938, H04R 1700
Patent
active
051874032
ABSTRACT:
Apparatus and method to provide a controllable one-dimensional array or two-dimensional array of delay times for an array of acoustic signals propagating in a plurality of bodies of piezoelectric material. Each piezoelectric body is provided with three or more pairs of electrodes, with the first and second electrodes of a pair being spaced apart and positioned on first and second surfaces, respectively, of the piezoelectric body. As an acoustic wave propagates longitudinally in the piezoelectric body, an electrical voltage signal is generated between each electrode pair as the wave passes between the two electrodes of that pair. Time delay is controlled by choice of the longitudinal position of each electrode pair along the piezoelectric body.
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Dzierzynski Paul M.
Hewlett--Packard Company
Lee Benny T.
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