Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1996-10-10
2000-12-12
Noori, Max
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
310316, G01P 904
Patent
active
061582816
ABSTRACT:
A vibration gyroscope 10 includes a vibrator 12. The vibrator 12 has a vibration member 14 formed in a regular triangular prism shape. On side faces of the vibration member 14, piezoelectric elements 16a, 16b and 16c are formed. Two of the piezoelectric elements 16a and 16b are connected to resistors 26 and 28, respectively. Between the other feedback piezoelectric element 16c and these resistors, an oscillation circuit 30 is connected. A signal having a phase opposite to that of the signal output from the feedback piezoelectric element 16c is input to the vibration member 14 serving as a grounding terminal by a phase inverter 34. The signals output from the two piezoelectric elements 16a and 16b are input to a differential circuit 36. The differential circuit 36 is connected to a synchronous detection circuit 38 and connected to a smoothing circuit 40 and a DC amplifier 42 in series.
REFERENCES:
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patent: 5220833 (1993-06-01), Nakamura
patent: 5270607 (1993-12-01), Terajima
patent: 5336960 (1994-08-01), Shimizu et al.
patent: 5434467 (1995-07-01), Abe et al.
patent: 5455476 (1995-10-01), Nakamura
patent: 5473288 (1995-12-01), Kumada
patent: 5505085 (1996-04-01), Kasanami et al.
Ebara Kazuhiro
Fujimoto Katsumi
Nakamura Takeshi
Nishiyama Hiroshi
Murata Manufacturing Co. Ltd.
Noori Max
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