Search International and National Patent Collections

1. (WO2013145644) ROTATION ANGLE DETECTION DEVICE

Pub. No.:    WO/2013/145644    International Application No.:    PCT/JP2013/001889
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Thu Mar 21 00:59:59 CET 2013
IPC: G01B 7/30
G01D 5/14
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: NAKAMURA, Tsutomu
中村 勉
OKUDA, Yasuyuki
奥田 泰行
ISHIKAWA, Takashi
石川 貴士
Title: ROTATION ANGLE DETECTION DEVICE
Abstract:
In a rotation angle detection device, a magnetic shield (16) comprises a first magnetic shield (16a) and a second magnetic shield (16b). The first magnetic shield (16a) is arranged in such a manner as to surround at least part of a magnet (12) and further towards the magnet (12) side than a surface of a magneto-electric transducer (14) facing the magnet (12) in an alignment direction of the magnet (12) and the magneto-electric transducer (14). The second magnetic shield (16b) is arranged in such a manner as to have a predetermined inter-shield distance between itself and the first magnetic shield (16a) in the alignment direction, and is arranged in such a manner as to rectify a disturbance magnetic field on the opposite side to the first magnetic field (16a) with respect to the magneto-electric transducer (14) and in a direction in which the magnetic field is not changed by the rotation of the magnet.