US 12,306,022 B2
Position sensor
Tetsuya Ohmi, Kariya (JP); Michihiro Makita, Kariya (JP); Masahiko Akiyama, Tokyo (JP); Masashi Misawa, Tokyo (JP); and Kenshi Masuo, Tokyo (JP)
Assigned to DENSO CORPORATION, Kariya (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by DENSO CORPORATION, Kariya (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Apr. 18, 2023, as Appl. No. 18/302,083.
Application 18/302,083 is a continuation of application No. PCT/JP2021/039509, filed on Oct. 26, 2021.
Claims priority of application No. 2020-183435 (JP), filed on Nov. 2, 2020.
Prior Publication US 2023/0258474 A1, Aug. 17, 2023
Int. Cl. G01D 5/16 (2006.01); F16H 59/04 (2006.01); G01D 5/14 (2006.01); G01R 33/00 (2006.01); G01R 33/09 (2006.01)
CPC G01D 5/16 (2013.01) [F16H 59/044 (2013.01); G01D 5/147 (2013.01); G01R 33/091 (2013.01); G01R 33/0023 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A position sensor, comprising:
a detecting circuit including a magnet configured to generate a bias magnetic field and a detection circuit to which the bias magnetic field is applied, and configured to generate a detection signal corresponding to a plurality of ranges aligned in one direction along a moving direction of a detection body based on a change in the magnetic field constantly received by the detection circuit from the detection body made of a magnetic material as the detection body moves; and
a signal processing circuit configured to acquire a detection signal from the detecting circuit, compare the detection signal with a threshold value, and identify a position of the detection body as a position of any one of a plurality of ranges based on a combination of a magnitude relationship between the detection signal and the threshold value,
wherein
the detection body has a plurality of region portions corresponding to the plurality of ranges,
the plurality of region portions are configured to be connected stepwise in the moving direction of the detection body within a plane of a detection surface facing the detecting circuit of the detection body,
when the detection body is missing, the signal processing circuit determines a missing of the detection body by acquiring a detection signal obtained by not receiving any influence of the magnetic field from the detection body, and
the detection circuit is a circuit whose resistance value changes based on the change in the magnetic field received from the detection body as the detection body moves.