发明授权
- 专利标题： Method of detecting plastic deformation in steel using a differential type magnetic field sensor
- 专利标题（中）： 使用差分式磁场传感器检测钢中塑性变形的方法
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申请号： US746794申请日： 1996-11-15
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公开(公告)号： US5982172A公开(公告)日： 1999-11-09
- 发明人: Noboru Ishikawa , Hiroshi Yamakawa , Kazuo Chinone , Satoshi Nakayama , Akikazu Odawara
- 申请人： Noboru Ishikawa , Hiroshi Yamakawa , Kazuo Chinone , Satoshi Nakayama , Akikazu Odawara
- 申请人地址： JPX Chiba
- 专利权人： Seiko Instruments Inc.
- 当前专利权人： Seiko Instruments Inc.
- 当前专利权人地址： JPX Chiba
- 优先权： JPX7-300276 19951117
- 主分类号： G01R33/12
- IPC分类号： G01R33/12 ; G01N27/72 ; G01N27/82 ; G01N27/83 ; G01B7/24
摘要：
To provide an effective method of nondestructively and easily judging plasticization of steel used in a real construction. A magnetic sensor 10 is made to scan along the surface of steel to detect a magnetic field caused by a magnetic anisotropy induced by plastic deformation of the steel, and the existence and position of the plasticization is judged from the state of distribution of the magnetic field. As a magnetic sensor, a differential type one comprised of detection coils 10a and 10b, the winding directions of which are opposite to each other, is used to compensate a magnetic field intrinsic to the steel.
公开/授权文献
- US4632379A Device for feeding individual sheets to an office machine 公开/授权日：1986-12-30
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