(19)
(11)EP 2 199 740 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
12.10.2016 Bulletin 2016/41

(43)Date of publication A2:
23.06.2010 Bulletin 2010/25

(21)Application number: 09177080.0

(22)Date of filing:  25.11.2009
(51)Int. Cl.: 
G01C 19/56  (2012.01)
(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

(30)Priority: 28.11.2008 JP 2008303376

(71)Applicant: Hitachi Automotive Systems, Ltd.
Hitachinaka-shi Ibaraki 312-8503 (JP)

(72)Inventors:
  • Nakamura, Toshiaki
    Tokyo 100-8220 (JP)
  • Matsumoto, Masahiro
    100-8220, Tokyo (JO)

(74)Representative: MERH-IP Matias Erny Reichl Hoffmann Patentanwälte PartG mbB 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)

  


(54)Angular velocity detecting apparatus


(57) An angular velocity detecting apparatus including one synchronous detection unit (28) alternately detecting synchronously a displacement signal from a vibrating body (4) with a plurality of synchronous detection signals (Φ1, Φ2); one integral calculation unit (11) alternately carrying out integral calculations of a plurality of outputs of the synchronous detection unit (28); a unit (19, 20) alternately multiplying a plurality of AC signals with two outputs obtained with the synchronous detection unit (28); a unit (21) adding the two multiplied outputs; and a unit (22, 23, 24, 25, 26) feeding back the output of the addition unit (21) to vibrating body (4).