Title:
MAGNETIC DISPLACEMENT SENSOR AND METHOD FOR DETECTING DISPLACEMENT
Document Type and Number:
WIPO Patent Application WO/2013/014991
Kind Code:
A1
Abstract:
The present invention prevents the relative speed of a row of permanent magnets and a row of coils from affecting the output of a magnetic displacement sensor, and makes it possible to shorten the length of the row of permanent magnets. The magnetic displacement sensor is formed by the same number of coils along the direction of displacement detection, and is provided with a least two rows of coils in which the starting and ending positions of the rows are equal along the direction of displacement detection, and a row of permanent magnets; and any affect on the output of the displacement sensor by the relative speed of the row of permanent magnets and the row of coils, or the magnetic field from the row of permanent magnets, is cancelled between at least two rows of coils.
Inventors:
HANAKA SATOSHI (JP)
Application Number:
PCT/JP2012/061734
Publication Date:
January 31, 2013
Filing Date:
May 08, 2012
Export Citation:
Assignee:
MURATA MACHINERY LTD (JP)
HANAKA SATOSHI (JP)
HANAKA SATOSHI (JP)
International Classes:
G01B7/00; B61B13/00; G01D5/245
Foreign References:
| JPH09318304A | 1997-12-12 | |||
| JPH11223505A | 1999-08-17 | |||
| JP2002022488A | 2002-01-23 | |||
| JP2005030836A | 2005-02-03 | |||
| JPH04157315A | 1992-05-29 |
Attorney, Agent or Firm:
SHIOIRI Akira et al. (JP)
Akira Shioiri (JP)
Akira Shioiri (JP)
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