Title:
位置検知装置
Document Type and Number:
Japanese Patent JP6492193
Kind Code:
B2
Abstract:
[Object] To provide a position detection device that includes a magnetic sensor and that can suppress variation in linearity of measured values due to a temperature change. [Solution] A movement unit 10 is provided with a first magnet 11 and a second magnet 12. A detection unit 20 includes a first magnetic sensor having an axis of sensitivity Sx and a second magnetic sensor having an axis of sensitivity Sz. The movement unit 10 and the detection unit 20 are movable relatively to each other along a movement trajectory Tx. The magnets 11 and 12 have facing surfaces 11a and 12a, each of which is a projecting curved surface having a shape such that both ends thereof are positioned farther away from the movement trajectory Tx than a center portion thereof. This shape can suppress the linearity error for measured values when the magnets are demagnetized in a high-temperature environment.
Inventors:
Yukiko Yasuda
Ichiro Tokunaga
Taku Saito
Ichiro Tokunaga
Taku Saito
Application Number:
JP2017547653A
Publication Date:
March 27, 2019
Filing Date:
August 26, 2016
Export Citation:
Assignee:
Alps Alpine Co., Ltd.
International Classes:
G01D5/12
Domestic Patent References:
| JP2010197373A | ||||
| JP2001050703A | ||||
| JP2007132710A |
Foreign References:
| US7088095 |
Attorney, Agent or Firm:
野▲崎▼ 照夫
Iwao Hirayama
Masahiro Matsushita
Katsuyuki Okubo
Iwao Hirayama
Masahiro Matsushita
Katsuyuki Okubo