Title:
INERTIA SENSOR
Document Type and Number:
WIPO Patent Application WO/2012/005062
Kind Code:
A1
Abstract:
This invention is directed to provision of a high-performance inertia sensor that can sustain SNR even in an environment where vibration disturbance exists. A vibration type inertia sensor comprises: two dead weights (2, 3); means (C1, C2, C3, C4, +Vd, −Vd) for displacing the two dead weights in the opposite phases; two sets of electrodes (C5, C6, C7, C8) for detecting, as capacitance changes, the displacements of the two dead weights; and a C/V converting unit (53) for converting the capacitance changes of the electrodes to electric signals. In the vibration type inertia sensor, a set of electrodes (e.g., C5 and C8), which exhibit an increased electrostatic capacitance therebetween in the case where the two dead weights (2, 3) are displaced in the opposite phases, are electrically connected to each other, and a set of electrodes (e.g., C6 and C7), which exhibit a reduced electrostatic capacitance therebetween in the foregoing case, are electrically connected to each other, and further these sets of electrodes are connected to the C/V converting unit (53).
Inventors:
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)
DEGAWA Munenori (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)
DEGAWA Munenori (HITACHI LTD., 280, Higashikoigakubo 1-chome, Kokubunji-sh, Tokyo 01, 〒1858601, JP)
Application Number:
JP2011/061954
Publication Date:
January 12, 2012
Filing Date:
May 25, 2011
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
日立オートモー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)
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)
日立オートモー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)
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)
International Classes:
G01C19/56
Attorney, Agent or Firm:
POLAIRE I.P.C. (7-1 Hatchobori 2-chome, Chuo-ku, Tokyo 32, 〒1040032, JP)
Claims: