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:
Dec. 23, 2003
Filed:
Aug. 23, 2002
Masakazu Hatanaka, Osaka, JP;
Satoshi Ouchi, Hyogo, JP;
Toshiyuki Nozoe, Kyoto, JP;
Shusaku Kawasaki, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An angular velocity sensor with improved detection chacteristics using a tuning fork vibrator made of a single crystalline piezoelectric material such as quartz. The turning fork vibrator includes two vibrators bonded together to provide an integral structure so that the vibrators by their respective crystal axis directions generate a piezoelectric phenomena in inverse polarities in their width directions. The tuning fork vibrator has two tuning fork arms and a tuning fork base. Two detection electrodes are respectively disposed on outer faces of the two tuning fork arms. And two other detection electrodes are respectively disposed on inner faces of the two tuning fork arms. Two drive electrodes are respectively disposed on the two tunings fork arms. The two detection electrodes disposed on the outer faces of the two tuning fork arms are commonly connected, and the two detection electrodes disposed on the inner faces of the two tuning fork arms are commonly connected for canceling capacitive coupling from drive section to detecting section.