To provide a rotation status detecting device for simply detecting the rotational direction of a rotating body, and to provide a rotation status detection method.
The rotation status detecting device includes a magnet for generating bias magnetic field, first and second bridge circuits composed of a pair of magnetoresistance effect elements for generating resistant change by the status change of the bias magnetic field corresponding to rotation of an object to be detected by facing a uneveness shaped magnetic rotating body which is the object to be detected in the bias magnetic field of the magnet and being arranged in the rotational direction in parallel, and a detection means, having a second comparator for outputting a logical value, by detecting the size of a middle point voltage and the reference voltage of the first bridge circuit and detecting the size of middle point voltages and reference voltages of a first comparator and the second bridge circuit and for detecting the changes in the output of the first and second comparator.
| JPH0450771 | SPEED DETECTOR |
| WO/2010/100357 | METHOD FOR ESTIMATING THE STOPPAGE POSITION OF A COMBUSTION ENGINE |
OONAKAMICHI TAKAHIRO
MURAKAMI TAKAAKI
ARIYOSHI YUJI
OZASAYAMA YASUHIRO
| JP2002267494A | 2002-09-18 | |||
| JPH03181817A | 1991-08-07 | |||
| JP4302558B2 | 2009-07-29 | |||
| JP2002090181A | 2002-03-27 | |||
| JPS63210667A | 1988-09-01 | |||
| JPH0580066A | 1993-03-30 | |||
| JP2000337922A | 2000-12-08 | |||
| JP2003298140A | 2003-10-17 |
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka