Title:
METAL DETECTION SENSOR AND METAL DETECTION METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2017/002698
Kind Code:
A1
Abstract:
Provided is a small-sized metal detection sensor capable of detecting a minute foreign metal substance by an electromagnetic induction detection method. The metal detection sensor 20 for detecting a metal 14 included in an inspection object moving on a path 18, includes: magnets 24, 26 which generate static magnetic fields; and a coil 30 which detects a magnetic field 28 generated by the metal 14. The magnets 24, 26 are positioned outside the coil 30 relative to the axial direction of the coil 30. The coil 30 is positioned outside the magnets 24, 26 relative to the axial direction connecting the N pole and the S pole of each of the magnets 24, 26. The magnets 24, 26 are opposed to the coil 30.
Inventors:
TAKAHASHI TARO (JP)
TADA MITSUO (JP)
TADA MITSUO (JP)
Application Number:
PCT/JP2016/068619
Publication Date:
January 05, 2017
Filing Date:
June 23, 2016
Export Citation:
Assignee:
EBARA CORP (JP)
International Classes:
G01V3/10
Domestic Patent References:
| WO2003027659A1 | 2003-04-03 |
Foreign References:
| JPH0225789A | 1990-01-29 | |||
| JP2004028708A | 2004-01-29 | |||
| JPS5952496U | 1984-04-06 | |||
| JP2004264266A | 2004-09-24 | |||
| JP2015059818A | 2015-03-30 | |||
| JP2014228522A | 2014-12-08 | |||
| JPH03181879A | 1991-08-07 | |||
| JP2003080107A | 2003-03-18 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
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