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:
Aug. 31, 1999
Filed:
Dec. 12, 1997
Motohiro Fujiyoshi, Aichi-ken, JP;
Yoshiteru Omura, Seto, JP;
Yutaka Nonomura, Nagoya, JP;
Norio Fujitsuka, Nisshin, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-ken, JP;
Abstract
A resonance type angular velocity sensor is provided with a mass displacement supporting beam (20, 21, 22, 23) for supporting a vibration in a detecting direction due to a Coriolis force of a mass portion (1) and a mass excitation supporting beam for supporting a mass displacement supporting base portion (24, 25) in such a manner as to allow the mass portion (1) to vibrate away from the beam in an excitation direction. When the mass displacement supporting base portion (24) is excited in the excitation direction by an opposing comb exciting electrode (51), the mass portion (1) vibrates. A projecting electrode (31) is provided in a side surface of the Coriolis force detecting direction of the mass portion (1) and capacity detecting electrodes (30, 32) are disposed in such a manner as to oppose this. When the Coriolis force acts on the mass portion (1) vibrating in the excitation direction, the mass portion (1) vibrates also in the detecting direction so that the capacity change is detected by the capacity detecting electrodes (30, 32). In such a case, it is possible to provide a mechanism for applying a stress to the beam members (10, 11, 12, 13, 14, 15, 16, 17) so as to adjust the exciting frequency.