Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1992-06-06
1993-12-14
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310321, 73505, H01L 4108
Patent
active
052706079
ABSTRACT:
A vibration control apparatus comprises a vibration member having a surface with a resonance point. A piezoelectric element is adhered to the surface of the vibration member. A drive apparatus is connected to the piezoelectric element via an impedance element for exciting the piezoelectric element with an A.C. signal. A feedback circuit is connected between the piezoelectric element and the drive apparatus. The feedback circuit picks out the components of a voltage on the piezoelectric element caused by a strain of the piezoelectric element and feeds this voltage back to control the drive apparatus. The inventive vibration control apparatus may be incorporated in a gyro to simplify the construction of the gyro.
REFERENCES:
patent: 3520195 (1970-07-01), Tehon
patent: 3967143 (1976-06-01), Watanabe et al.
patent: 4193010 (1980-03-01), Kompanek
patent: 4406965 (1983-09-01), Ljung
patent: 4489609 (1984-12-01), Burdess et al.
patent: 4692649 (1987-09-01), Izukawa et al.
patent: 4709360 (1987-11-01), Martin et al.
patent: 4740726 (1988-04-01), Umezawa
patent: 4780062 (1988-10-01), Yamada et al.
patent: 4833358 (1989-05-01), Suzuki et al.
patent: 4879528 (1989-11-01), Gotanda
patent: 5061882 (1991-10-01), Takagi
patent: 5117148 (1992-05-01), Nakamura et al.
W. D. Gates, "Vibrating angular rate sensor may threaten the gyroscope", Electronics, vol. 41, No. 10, pp. 131-134.
"Angular rate sensor", Sensor Device Handbook, No. 14, 1983, pp. 193-194 edited by Information Group of Journal of Sensor Technology.
Akai Electric Co. Ltd.
Budd Mark O.
LandOfFree
Vibration control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vibration control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vibration control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1708186