Title:
誘導位置センサー
Document Type and Number:
Japanese Patent JP4809829
Kind Code:
B2
Abstract:
An inductive position sensor for position sensing includes a transmitter coil and a receiver coil, the receiver coil generating a receiver signal when the transmitter coil is excited by an alternating current source. A moveable coupler element modifies the inductive coupling between the transmitter coil and the receiver coil so that the receiver signal is sensitive to the coupler element position. For example, the coupler element may rotate about a common central axis of the transmitter coil and receiving coil. In further examples, a reference coil is configured so that a provided reference signal is substantially insensitive to variations in the angular position of the coupler element. A ratio between the receiver signal and the reference signal is sensitive to the coupler element position, but substantially insensitive to common mode factors that influence the reference signal and receiver signal to a substantially equal degree.
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Inventors:
Lee June Kay
Application Number:
JP2007506865A
Publication Date:
November 09, 2011
Filing Date:
April 11, 2005
Export Citation:
Assignee:
KS Technologies Company
International Classes:
G01D5/245; B60K26/00; G01B7/14; G01B7/30; G01D5/20; G01D5/22; G01D5/244; G01V3/00; G05D13/62; H01F21/10; H01F5/00
Domestic Patent References:
| JP2002039793A | 2002-02-06 | |||
| JP2002048508A | 2002-02-15 |
Foreign References:
| US6448759B2 | 2002-09-10 | |||
| WO2004005937A2 | 2004-01-15 |
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda