Electronically tunable resonant accelerometer

Details Electronically tunable resonant accelerometer Electronically tunable resonant accelerometer

1979-01-25

1980-04-08

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, 310329, 310325, 310326, 73517R, H01L 4110

Patent

active

041974786

ABSTRACT:
An electronically tunable resonant accelerometer is shown wherein the frequency of a resonant peak may be adjusted over a range of frequencies. A piezoelectric element of the accelerometer is used with a seismic mass to generate an output voltage in response to reciprocating motion of the accelerometer. In a compression mode, a feedback loop applies a feedback voltage to a second piezoelectric element mechanically coupled to the first mentioned piezoelectric element. In a cantilever mode, a feedback loop applies a feedback voltage to another location along the first mentioned piezoelectric element which is formed from two bonded piezoelectric elements. By adjusting gain and phase of the feedback loop, first, the resonant frequency of the accelerometer may be varied over a wide range of frequencies to give increased sensitivity to reciprocating motion occurring at a frequency within a narrow band width centered on the resonant frequency, and, second, damping of the resonance may be varied to control the band width of the resonance.

REFERENCES:
patent: 2594841 (1952-04-01), Arndt, Jr.
patent: 3336529 (1967-08-01), Tygart
patent: 3447051 (1969-05-01), Attwood et al.
patent: 3714475 (1973-01-01), Baker, Jr.
patent: 3873947 (1975-03-01), Johnson
patent: 3889166 (1975-06-01), Scurlock

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