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Title:
ROTATION ANGLE DETERMINING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2008/056792
Kind Code:
A1
Abstract:
A rotation angle determining apparatus comprises an angle determining means that has determining circuits each including a determining element part consisting of a coil and a resistor and that also has an inductance changing means that changes the inductance of the coil in accordance with the rotation of a rotating object to be determined. The rotation angle determining apparatus further comprises a reference pulse voltage generating means that causes the determining circuits to generate output signals; and a calculating means that calculates the output signals of the determining circuits. The calculating means obtains an integration valueby integrating, for a predetermined time, a transient output voltage occurring when a reference pulse voltage generated by the reference pulse voltage generating means is inputted to the determining circuits. The calculating means then determines, based on the integration value, a rotation angle of the rotating object, whereby the number of components of the rotation angle determining apparatus can be reduced and error factors of the output signals of the determining circuits can be reduced. As a result, the logic circuits and amplifier circuits can be simplified and hence the cost of the rotation angle determining apparatus can be reduced.

Inventors:
SAITO SHINYA (JP)
HORI SHINJI (JP)
TORATANI TOMOAKI (JP)
Application Number:
PCT/JP2007/071842
Publication Date:
May 15, 2008
Filing Date:
November 09, 2007
Export Citation:
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Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
SAITO SHINYA (JP)
HORI SHINJI (JP)
TORATANI TOMOAKI (JP)
International Classes:
G01D5/20; B62D5/04; G01B7/30; B62D1/04
Foreign References:
JP2006153843A2006-06-15
JP2004069415A2004-03-04
JP2004012316A2004-01-15
JP2002303507A2002-10-18
JP2003202240A2003-07-18
JP2004053444A2004-02-19
Other References:
See also references of EP 2080992A4
Attorney, Agent or Firm:
MIYAKAWA, Kohichi (17-1 Minamifujisawa, Fujisawa-shi, Kanagawa 55, JP)
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