Title:
回転角度センサ、この回転角度センサを用いたトルクセンサ、このトルクセンサを用いた電動パワーステアリング装置
Document Type and Number:
Japanese Patent JP3587674
Kind Code:
B2
Abstract:
A rotation angle sensor wherein when code plates rotate as a result of rotation of rotary members, detecting elements detect information on information recording portions of the code plates in order to detect the rotation angles of the rotary members. Therefore, the rotation angles of the rotary members can be detected with high precision. In conventional rotation angle sensors, a rotary drum, being a magnetic medium, is mounted directly to a rotary shaft. Therefore, when two such conventional rotation angle sensors are mounted to a rotary shaft, and a rotational torque is applied to a drive shaft portion in order to rotate a load shaft portion, so that a large load is applied to the load shaft portion, the drive shaft portion and the load shaft portion may become decentered. This causes the gap between one of the two rotary drums and its associated detecting sensor as well as the gap between the other of the two rotary drums and its associated detecting sensor to vary, making it impossible to precisely detect the difference between the rotation angles of the two rotary drums. The rotation angle sensor of the invention overcomes this problem.
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Inventors:
Hirofumi Okumura
Application Number:
JP156798A
Publication Date:
November 10, 2004
Filing Date:
January 07, 1998
Export Citation:
Assignee:
ALPS ELECTRIC CO.,LTD.
International Classes:
G01L3/10; B62D1/04; B62D5/04; G01B7/00; G01B7/30; G01D5/14; G01D5/16; G01D5/245; (IPC1-7): G01B7/30; B62D1/04; B62D5/04; G01D5/245; G01L3/10
Foreign References:
| DE4028246A |