Single axis crystal constrained temperature compensated digital

Details Single axis crystal constrained temperature compensated digital Single axis crystal constrained temperature compensated digital

1979-12-03

1981-03-31

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Temperature compensator

310329, G01P 1509

Patent

active

042585724

ABSTRACT:
An accelerometer utilizes a pair of SC-cut crystals which respond differentially to acceleration inputs. Each crystal exhibits a highly temperature sensitive resonant mode and a relatively temperature insensitive resonant mode. Both modes are excited simultaneously by an oscillator. The difference frequency data between respective modes of each crystal, as well as the difference frequency data between the two modes of one of the crystals, is processed to obtain a temperature compensated value of acceleration.

REFERENCES:
patent: 3479536 (1969-11-01), Norris
patent: 4160183 (1979-07-01), Kusters et al.
"Dual Mode Operation of Temperature and Stress Compensated Crystals" by Kusters et al., Proceedings of the 32nd Annual Symposium on Frequency Control, 1978. _
"The Force-Frequency Effect in Doubly Rotated Quartz Resonators" by Bollato et al., Proceedings of the 31st Annual Symposium on Frequency Control, 1977. _

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