Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1995-12-12
1997-10-07
Williams, Hezron E.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
7350414, 310316, G01P 904
Patent
active
056750838
ABSTRACT:
A vibrating gyroscope 10 which can suppress a drift signal even if the resonance characteristics of a plurality of detection means of the vibrating body vary includes a vibrator 12. The vibrator 12 comprises a columnar, triangular shaped vibrating body 14 and piezoelectric elements 16, 18, and 20. Divided sections 16a and 16b of the detection piezoelectric element 16 are connected to a first cumulative circuit 32 and a first differential circuit 34. Divided sections 18a and 18b of the detection piezoelectric element 18 are connected to a second cumulative circuit 36 and a second differential circuit 38. Output signals of the first and second cumulative circuits 32 and 36 are input into a third differential circuit 40. Output signals of the first and second differential circuits 34 and 38 are input into a fourth differential circuit 42. Output signals of the third and fourth differential circuits 40 and 42 are input into an arithmetic circuit 44. Alternatively, it may be allowed that the divided sections 16a and 18a, as well as 16b and 18b of the piezoelectric elements 16 and 18 are connected separate differential circuits, and output signals of these differential circuits are input into the arithmetic circuit.
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"Patent Abstracts of Japan" vol. 13 No. 191 (p. 867), Sep. 5, 1989.
Kwok Helen C.
Murata Manufacturing Co. Ltd.
Williams Hezron E.
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