The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2010
Filed:
Nov. 07, 2006
Hiroaki Kohama, Setagaya, JP;
Kazuhiko Yasohama, Katsusika, JP;
Makio Iwamoto, Fussa, JP;
Takayuki Yamaki, Kashiwa, JP;
Ichiro Fujitomi, Setagaya, JP;
Hiroaki Kohama, Setagaya, JP;
Kazuhiko Yasohama, Katsusika, JP;
Makio Iwamoto, Fussa, JP;
Takayuki Yamaki, Kashiwa, JP;
Ichiro Fujitomi, Setagaya, JP;
Kaisei Engineer Co., Ltd., Kanagawa, JP;
Abstract
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.