发明名称 |
ELECTROMAGNETIC INDUCTION TYPE INSPECTION DEVICE AND METHOD |
摘要 |
Any inspection object regardless of material can easily be inspected or discriminated with high accuracy and high sensitivity by being placed in a magnetic field generated by applying an alternating current to an exciting coil and detecting changes of voltage level and phase of electromotive force induced by a detection coil unit. The discrimination of the inspection object is performed on the basis of a DC voltage value with respect to a standard specimen and a phase differential voltage value with respect to a phase difference between the phase of a voltage signal from the induction coil and the phase of the exciting current to the exciting coil.
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申请公布号 |
US2010052667(A1) |
申请公布日期 |
2010.03.04 |
申请号 |
US20060593560 |
申请日期 |
2006.11.07 |
申请人 |
KOHAMA HIROAKI;YASOHAMA KAZUHIKO;IWAMOTO MAKIO;YAMAKI TAKAYUKI;FUJITOMI ICHIRO |
发明人 |
KOHAMA HIROAKI;YASOHAMA KAZUHIKO;IWAMOTO MAKIO;YAMAKI TAKAYUKI;FUJITOMI ICHIRO |
分类号 |
G01R33/12 |
主分类号 |
G01R33/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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