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:
Mar. 05, 2002
Filed:
Jun. 02, 1999
Takashi Kunimi, Tokyo, JP;
Masahiro Nezu, Tokyo, JP;
Masatomo Mori, Tokyo, JP;
Kazuya Kato, Tokyo, JP;
Akebono Brake Industry Co., Ltd., Tokyo, JP;
Abstract
To improve a response rate and an impact detection precision of an auxiliary acceleration sensor device for an air bag system, an auxiliary acceleration sensor device includes a longitudinal G sensor for sensing a longitudinal acceleration G of a vehicle, and lateral G sensor for sensing a lateral acceleration G of the vehicle. The longitudinal G sensor includes a constant current source circuit, a detector portion for outputting an electrical signal representative of a longitudinal acceleration G, and an amplifier portion for amplifying the signal received from the detecting portion. The comparator includes comparing elements that compare the voltage values corresponding to longitudinal threshold values Tf to Tf of the longitudinal acceleration G with an output signal of the amplifier portion. Lateral G sensor includes a constant current source circuit, a detector portion for outputting an electrical signal representative of a lateral acceleration G, and an amplifier portion for amplifying the signal received from the detecting portion. Comparator means includes comparing elements which compare the voltages corresponding to lateral threshold values Ts to Ts of the lateral acceleration G with the output signal of the amplifier portion. An OR circuit coupled for reception with the comparator means outputs a signal to a main controller of an air bag control system when predetermined conditions are satisfied.