The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2000
Filed:
Jan. 09, 1998
Hiroaki Kobayashi, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides an angular velocity sensor having a simplified configuration and a superior detection sensitivity by sufficiently utilizing the capability of the piezoelectric elements. A plurality of piezoelectric elements 3, 4, and 5 are attached to a constant-elastic metal oscillator 2. One of the piezoelectric elements 3, 4, and 5 is made to function as an impedance element of the Colpitts oscillation circuit, constituting a self-oscillation type drive circuit 6. While this self-oscillation type drive circuit 6 is driven so as to oscillate the constant-elastic metal oscillator 2, the Coriolis force generated in the constant-elastic metal oscillator 2 is detected by the other piezoelectric elements 4 and 5.