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:
Sep. 16, 1997
Filed:
Mar. 25, 1996
Koji Ito, Ama gun, JP;
Taneichi Kawai, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
The invention is directed to a method and apparatus for detecting an impact on a vehicle. The apparatus includes an acceleration sensor for sensing an acceleration of the vehicle, and a transformer for transforming the acceleration into an electric signal indicative of the acceleration to output an acceleration signal. A wavelet transformer transforms the acceleration signal by a wavelet function into a wavelet coefficient. The wavelet function is provided on the basis of a mother wavelet function localized in time, scaled in response to a scale parameter, and shifted in response to a shift parameter indicative of a time localization. Then, an impact determination device determines a condition of the impact on the basis of the wavelet coefficient with respect to at least a predetermined reference scale parameter. The apparatus may further include a vehicle passenger restraint system which restrains passengers in the vehicle in accordance with the result of determination by the impact determination device.