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Patent Searching and Data


Title:
INERTIAL SENSOR
Document Type and Number:
WIPO Patent Application WO/2012/020739
Kind Code:
A1
Abstract:
In order to provide an inertial sensor capable of suppressing a wrong diagnosis even in an adverse environment such that sudden noise occurs, an inertial sensor is provided with a movable part (105), a first detection unit (C1, C2) for detecting the amount of displacement of the movable part (105), a forced vibration means (503, C3, C4) for forcedly vibrating the movable part (105) by applying a diagnosis signal, a physical quantity calculation unit (502) for calculating the physical quantity from a detection signal from the first detection unit (C1, C2), and an abnormality determination unit (504) for determining the presence or absence of the abnormality of the physical quantity using the diagnosis signal obtained via the first detection unit (C1, C2), and is used within a vehicle, the inertial sensor further comprising a second sensor (510) mounted in the same vehicle and connected to the abnormality determination unit (504).

Inventors:
YAMANAKA Kiyoko (HITACHI LTD., 280, Higashikoigakubo 1-chome, Kokubunji-sh, Tokyo 01, 〒1858601, JP)
山中 聖子 (〒01 東京都国分寺市東恋ヶ窪一丁目280番地 株式会社日立製作所 中央研究所内 Tokyo, 〒1858601, JP)
JEONG HEEWON (HITACHI LTD., 280, Higashikoigakubo 1-chome, Kokubunji-sh, Tokyo 01, 〒1858601, JP)
鄭 希元 (〒01 東京都国分寺市東恋ヶ窪一丁目280番地 株式会社日立製作所 中央研究所内 Tokyo, 〒1858601, JP)
Application Number:
JP2011/068090
Publication Date:
February 16, 2012
Filing Date:
August 08, 2011
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
日立オートモティブシステムズ株式会社 (〒03 茨城県ひたちなか市高場2520番地 Ibaraki, 〒3128503, JP)
YAMANAKA Kiyoko (HITACHI LTD., 280, Higashikoigakubo 1-chome, Kokubunji-sh, Tokyo 01, 〒1858601, JP)
山中 聖子 (〒01 東京都国分寺市東恋ヶ窪一丁目280番地 株式会社日立製作所 中央研究所内 Tokyo, 〒1858601, JP)
JEONG HEEWON (HITACHI LTD., 280, Higashikoigakubo 1-chome, Kokubunji-sh, Tokyo 01, 〒1858601, JP)
International Classes:
G01P21/00; G01P15/125
Foreign References:
JP2008107108A2008-05-08
JPH07225244A1995-08-22
JP2001091535A2001-04-06
JPH05281256A1993-10-29
Other References:
See also references of EP 2605022A1
Attorney, Agent or Firm:
POLAIRE I.P.C. (7-1 Hatchobori 2-chome, Chuo-ku, Tokyo 32, 〒1040032, JP)
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Claims: