Title:
METHOD AND APPARATUS FOR DETECTING EDGE CRACK OF STEEL BAND
Document Type and Number:
Japanese Patent JP3950372
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enlarge a gap between a steel plate and sensors to a half or more of a detectable defect size.
SOLUTION: The gap between the steel plate 3 and the eddy current detection sensors 1a, 1b is enlarged by disposing two probe coils 2 in parallel, generating repelling magnetic fields from two probe coils 2 to the steel plate 3 and extending a region of the magnetic fields acting on the steel plate.
Inventors:
Takuji Kobayashi
Mayumi Yasuhiro
Yoshiaki Kuroda
Atsushi Saida
Mayumi Yasuhiro
Yoshiaki Kuroda
Atsushi Saida
Application Number:
JP2002181902A
Publication Date:
August 01, 2007
Filing Date:
June 21, 2002
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
G01N27/90; (IPC1-7): G01N27/90
Domestic Patent References:
| JP49003588U | ||||
| JP63038057U | ||||
| JP2001174438A | ||||
| JP9325132A | ||||
| JP58135449A | ||||
| JP61084556U |
Attorney, Agent or Firm:
Takayoshi Kokubun
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