Title:
ANGULAR VELOCITY DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/002085
Kind Code:
A1
Abstract:
The purpose of the present invention is to achieve accurate angular velocity detection even when an angular velocity detection sensor is set in an environment in which oscillation and electromagnetic noise have significant influence.
Provided is an angular velocity detection device which has an oscillating body displaceable in first and second directions that are perpendicular to each other, and which detects, as an angular velocity, a displacement of the oscillating body in the second direction while the oscillating body is being oscillated in the first direction, wherein in accordance with a frequency change in a drive signal for oscillating the oscillating body in the first direction, the frequency of a servo signal for detecting the angular velocity from the quantity of displacement in the second direction is changed (see FIG. 1).
Inventors:
NAKAMURA TOSHIAKI (JP)
MATSUMOTO MASAHIRO (JP)
IWASAWA HIROSHI (JP)
ASANO SATOSHI (JP)
HAYASHI MASAHIDE (JP)
MATSUMOTO MASAHIRO (JP)
IWASAWA HIROSHI (JP)
ASANO SATOSHI (JP)
HAYASHI MASAHIDE (JP)
Application Number:
PCT/JP2012/065685
Publication Date:
January 03, 2013
Filing Date:
June 20, 2012
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
NAKAMURA TOSHIAKI (JP)
MATSUMOTO MASAHIRO (JP)
IWASAWA HIROSHI (JP)
ASANO SATOSHI (JP)
HAYASHI MASAHIDE (JP)
NAKAMURA TOSHIAKI (JP)
MATSUMOTO MASAHIRO (JP)
IWASAWA HIROSHI (JP)
ASANO SATOSHI (JP)
HAYASHI MASAHIDE (JP)
International Classes:
G01C19/5726
Foreign References:
| JP2011064515A | 2011-03-31 | |||
| JP2009150655A | 2009-07-09 | |||
| JP2011058860A | 2011-03-24 | |||
| JP2010107326A | 2010-05-13 |
Attorney, Agent or Firm:
HIRAKI Yusuke et al. (JP)
Yusuke Hiraki (JP)
Yusuke Hiraki (JP)
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Claims: