Title:
ROTATION DETECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2015/162852
Kind Code:
A1
Abstract:
In this rotation detection apparatus (20), a signal detector (30) generates, on the basis of changes in the resistance values of multiple magnetoresistive element pairs (31-33), a first signal (S3) with a waveform corresponding to the concavoconvex structure of the convexities (12) and concavities (13) of a rotor (10), and a second signal (S4) with a waveform having a phase difference with respect to the first signal. Further, a determination circuit (40) inputs the first signal and the second signal from the signal detector, and generates a first binarized signal by binarizing the first signal by comparison with a binarization threshold and generates a second binarized signal by binarizing the second signal by comparison with a binarization threshold. Further, the determination circuit prevents output of the first binarization signal during convexity periods (46) of the second binarization signal which correspond to the convexities.
Inventors:
KOBAYASHI ATSUSHI (JP)
CHIKUAN KENJI (JP)
CHIKUAN KENJI (JP)
Application Number:
PCT/JP2015/001679
Publication Date:
October 29, 2015
Filing Date:
March 24, 2015
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01D5/245; G01D5/244
Foreign References:
| JPH10332725A | 1998-12-18 | |||
| JPS6416923A | 1989-01-20 | |||
| JP2008008699A | 2008-01-17 | |||
| JP2009058240A | 2009-03-19 | |||
| JP2007170922A | 2007-07-05 | |||
| JPH10299558A | 1998-11-10 | |||
| JP2005221466A | 2005-08-18 | |||
| JPH08105707A | 1996-04-23 |
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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