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:
Oct. 23, 2001
Filed:
May. 27, 1999
Jack Daniel Johnson, Russiaville, IN (US);
Seyed Ramezan Zarabadi, Kokomo, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A motion sensor (,) includes a micromachined sensing structure and a number of capacitive electrodes (,) disposed about a periphery thereof. The sensing structure includes a ring (,) supported above a substrate (,) so as to have an axis of rotation normal to the substrate (,), and a number of springs (,) attached to a post (,) positioned at the center of the ring (,). Certain diametrically opposed ones of the capacitive electrodes (,) are configured as drive electrodes (,), and other diametrically opposed ones of the capacitive electrodes (,), positioned 90 degrees relative to the corresponding drive electrodes (,) are configured as sense electrodes (,). Signals produced at the opposed sense electrodes (,) are conditioned and coupled to a common input of an amplifier circuit (,). With the configuration of the drive (,) and sense (,) electrodes and supporting circuitry (,), the resulting sensor (,) is operable to reject the effects of linear forces thereupon due to road vibrational effects.