Compound piezoelectric accelerometer with residual voltage match

Details Compound piezoelectric accelerometer with residual voltage match Compound piezoelectric accelerometer with residual voltage match

1984-08-13

1985-07-30

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310331, 310332, 73516LM, H01L 4108

Patent

active

045324506

ABSTRACT:
The compound accelerometer is made by combining two simple accelerometer units. The simple accelerometer units consist of a hollow container closed at each end by a piezo-electric transducer. The two transducers are oppositely polarized and are selected to have a desired combined series capacitance value. The container is partially filled with a volume of heavy liquid and the accelerometer is excited. During excitation, the output voltage is continuously measured and the volume of liquid is microadjusted until the output voltage equals a prescribed level. The outputs of the individual transducers are measured, the residual voltage difference is tabulated and the dominant transducer is identified. Two simple accelerometer units having the same residual voltage difference are secured together with the dominant transducers facing oppositely with respect to each other.

REFERENCES:
patent: 3813744 (1974-06-01), Morris
patent: 3970878 (1976-07-01), Berglund
patent: 4317059 (1982-02-01), Besson
patent: 4334296 (1982-06-01), Hall, Jr.
patent: 4344010 (1982-08-01), Vig
patent: 4345473 (1982-08-01), Berni
patent: 4395908 (1983-08-01), Shopland
patent: 4455500 (1984-06-01), Savit et al.

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