Kaisei Engineer Co., Ltd.

Takayuki Yamaki

Hiroaki Kohama

Kazuhiko Yasohama

Makio Iwamoto

Ichiro Fujitomi

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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Kashiwa, Japan

Takayuki Yamaki