Kawasaki Jukogyo Kabushiki Kaisha

Chubu Electric Power Company, Inc.

Katsuhiro Onda

Kouyu Itoga

Takaaki Okumura

Shigetomo Matsui

Hideyuki Hirasawa

Takamasa Ogata

Osamu Miki

Masahiro Uenishi

Kouji Michiba

Takaya Misumi

Tetsuzo Harada

Yuji Sugita

Kouji Sugimoto

Harutaka Koike

Hiroo Owaki

Sadao Iuchi

Sumihiro Ueda

Ultrasonic defect testing method and apparatus

A radiographic test is conducted on a welded portion of a pipe or the like to form a radiographic image, which is introduced into a computer. Volumetric defects and planar defects in the radiographic image are emphasized and extracted by separate methods to obtain a volumetric candidate defect image and a planar candidate defect image. The candidate defect images are then combined to form a single image in which defects can be easily identified. Features of defects in the images are measured, and a set of interference rules is applied to the measured features. Each inference rule gives a degree of certainty that a defect is of a certain type. The degrees of certainty determined by a plurality of the rules are collated to obtain a total degree of certainty, and the type of a defect is inferred from the total degree of certainty.

Method of processing radiographic image data for detecting a welding

Growing community of inventors

Nagoya, Japan

Katsuhiro Onda