Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
POSITION DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2021076548
Kind Code:
A
Abstract:
To provide a position detection device capable of ensuring redundancy while suppressing a decrease in detection precision.SOLUTION: A position detection device includes: an excitation part; plural detection parts provided in mutually difference places in the radial direction with an axis AX as a center; a non-magnetic metal part 220 for changing an induced electromotive voltage generated in the detection part according to a position of an object; and a control part for calculating a position of an object on the basis of an induced electromotive voltage generated in the detection part. The non-magnetic metal part 220 has plural arc parts that oppose each of plural detection parts, and includes a first arc part 221 and a second arc part 222. The first arc part 221 is provided over a first range α in a circumferential direction with the axis AX as a center, and the second arc part 222 is provided over a second range β that is a range in the circumferential direction and at least partially differs from the first range α.SELECTED DRAWING: Figure 6

Inventors:
SATO SHUJI
Application Number:
JP2019205464A
Publication Date:
May 20, 2021
Filing Date:
November 13, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIPPON SEIKI CO LTD
International Classes:
G01D5/245
Attorney, Agent or Firm:
Kimura Mitsuru
Yuta Kobayashi
Kenro Shirai
Takuji Harada