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. 26, 2011
Filed:
Mar. 16, 2006
Yoshiaki Ishii, Yokohama, JP;
Akihiro Miyazaki, Futaba-Gun, JP;
Masafumi Nakatsuka, Mito, JP;
Shinji Ishimoto, Hitachinaka, JP;
Yoshiaki Ishii, Yokohama, JP;
Akihiro Miyazaki, Futaba-Gun, JP;
Masafumi Nakatsuka, Mito, JP;
Shinji Ishimoto, Hitachinaka, JP;
Global Nuclear Fuel-Japan Co., Ltd., Yokosuka-Shi, JP;
Abstract
An art of hydrogen concentration measurement in which the hydrogen concentration of any given location of an object to be measured can be nondestructively obtained is provided. The steps comprises: placing an electromagnetic ultrasonic sensorin the proximity of, or on, the surface of an object to be measured, said electromagnetic ultrasonic sensorgenerating a magnetic field in which the magnetic flux density changes at high frequency on the wall body of the object to be measuredand receiving a longitudinal ultrasonic wave whose vibration is deflecting in the direction parallel to the thickness direction and a transverse ultrasonic wave whose vibration is deflecting in the direction at an angle of substantially 90° with respect to said longitudinal direction; allowing the electromagnetic ultrasonic sensorto generate a changing magnetic field so that the longitudinal ultrasonic wave and the transverse ultrasonic wave form a resonant state and receive the longitudinal ultrasonic wave and the transverse ultrasonic wave generated in the object to be measured; detecting the resonance frequencies of the longitudinal ultrasonic wave and the transverse ultrasonic wave; calculating a predetermined resonance property index using said resonance frequencies of the longitudinal ultrasonic wave and the transverse ultrasonic wave; and calculating the hydrogen concentration of the object to be measuredwith reference to a reference material databasewhich stores the relation between the hydrogen concentration of a member with the same member specifications as those of said object to be measured and the resonance property index.