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. 09, 2008
Filed:
Mar. 27, 2006
Koji Ohtaka, Anjo, JP;
Shigenori Kobayashi, Hazu-gun, JP;
Motomi Iyoda, Seto, JP;
Yukio Nakagawa, Toyota, JP;
Yasuyuki Hishida, Hitachi, JP;
Takahiro Saito, Hitachi, JP;
Koji Ohtaka, Anjo, JP;
Shigenori Kobayashi, Hazu-gun, JP;
Motomi Iyoda, Seto, JP;
Yukio Nakagawa, Toyota, JP;
Yasuyuki Hishida, Hitachi, JP;
Takahiro Saito, Hitachi, JP;
DENSO CORPORATION, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hitachi Cable Ltd., Tokyo, JP;
Abstract
An optical fiber sensor can be interposed between a bumper reinforcement and a load transmitting plate to extend in the direction of width of a vehicle along with the bumper reinforcement. In this case, when a change does not occur substantially in an immediately previous predetermined period in an output voltage of a light emission amount of the optical fiber sensor, a feedback control is performed in such a way that the change becomes a level of zero of the output voltage of the optical fiber sensor. In contrast, when a change in the output voltage is not substantially zero, the immediately previous state of emission of light is maintained. Accordingly, it is possible to effectively compensate a zero point shift caused by a temperature change or/and an aging degradation of the optical fiber sensor.