Measuring and testing – Gas analysis – By vibration
Reexamination Certificate
2011-04-26
2011-04-26
Williams, Hezron (Department: 2856)
Measuring and testing
Gas analysis
By vibration
Reexamination Certificate
active
07930925
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 sensor2in the proximity of, or on, the surface of an object to be measured8, said electromagnetic ultrasonic sensor2generating a magnetic field in which the magnetic flux density changes at high frequency on the wall body of the object to be measured8and 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 sensor2to 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 measured8; 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 measured8with reference to a reference material database7which 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.
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Japanese Office Action (with English translation) issued on Feb. 8, 2011, in Japanese Patent Application No. 2005-075702 (5 pages).
Ishii Yoshiaki
Ishimoto Shinji
Miyazaki Akihiro
Nakatsuka Masafumi
Frank Rodney T
Global Nuclear Fuel-Japan Co., Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Williams Hezron
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