Linear accelerometer with piezoelectric suspension

Details Linear accelerometer with piezoelectric suspension Linear accelerometer with piezoelectric suspension

1978-05-11

1980-01-29

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310330, 73517B, H01L 4110

Patent

active

041863240

ABSTRACT:
A piezoelectric flexible arm member is mounted to a base at one end and supports a torque coil in a magnetic field at its other end. The torque coil comprises a seismic element disposed to be moved in accordance with acceleration forces applied thereto. A voltage is produced across the piezoelectric flexure arm when movement of the torque coil causes it to flex. The torque coil may include means to induce a signal in a position detector circuit representative of the position thereof. Both the signals from the piezoelectric member and the position detector may be used as error signals in a servo amplifier system to provide restoring forces to the torque coil and to produce an output signal representative of acceleration forces. A third conventional error signal may also be employed in the system.

REFERENCES:
patent: 3120622 (1964-02-01), Dranetz et al.
patent: 3389275 (1968-06-01), Brothers
patent: 3435323 (1969-03-01), Wieder
patent: 3727097 (1973-04-01), Cooper
patent: 3797320 (1974-03-01), Clampitt
patent: 4020687 (1977-05-01), Fischer

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