Nuclear Fuel Industries, Limited

The University of Tokyo

Junji Etoh

Yoshihiro Isobe

Takashi Matsunaga

Mitsuyuki Sagisaka

Ryota Ogawa

Taira Okita

Provided is a material diagnostic method capable measuring and diagnosing in a nondestructive manner the type, quantity of occurrence, depth distribution, and the like of even very small microstructures of about several tens of &#x3bc;m or less with sufficiently good precision. A material diagnostic method for using ultrasonic waves in a nondestructive manner to diagnose microstructures generated in a material, wherein changes in the scattering of ultrasonic waves by crystal grains are captured from bottom face waves and backscattered waves to thereby quantify the amount of change in microstructures, using the fact that changes in the properties of crystal grains produced by microstructures affect the scattering of ultrasonic waves.

Material diagnostic method

The purpose of the present invention is to provide a nondestructive inspection method and nondestructive inspection device for an anchor bolt capable of quantitatively inspecting the health of an anchor bolt fixed to a foundation by a metallic anchor. Provided is a nondestructive anchor-bolt inspection method for inspecting the health of an anchor bolt fixed to a foundation by a metallic anchor, wherein a striking sound is produced through the striking of a portion of the anchor bolt exposed from the surface of the foundation, frequency information is obtained through the reception and frequency analysis of the signal waveform of the striking sound, and the health of the anchor bolt is nondestructively and quantitatively inspected on the basis of the frequency information for the signal waveform. Also provided is a nondestructive inspection device for an anchor bolt.

Non-destructive testing method and a non-destructive testing device for an anchor bolt

This invention provides a method and device for nondestructive testing of an anchor bolt. Said method and device make it possible to quantitatively test the soundness of an anchor bolt affixed to a foundation via an adhesive anchor. In this method for nondestructive testing of an anchor bolt, in which the soundness of an anchor bolt affixed to a foundation via an adhesive anchor is tested, a section of the anchor bolt that is exposed from the surface of the foundation is hit so as to produce an impact noise, a signal waveform corresponding to said impact noise is received and subjected to frequency analysis so as to obtain frequency information for said signal waveform, and the soundness of the anchor bolt is nondestructively, quantitatively tested on the basis of said frequency information.

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Sennan-gun, Japan

Junji Etoh