摘要 |
In an ultrasonic inspecting apparatus, propagation time is measured between a transmitting point of an ultrasonic wave from outer circumference of a subject material and a receiving point of the ultrasonic wave at another point on the outer circumference spaced apart from the transmitting point by a predetermined angle, and a predetermined sequence of operations is performed with the measured propagation times and the known constants, thereby internal information concerning the material, including location and shape of a defect existing therein, is provided.
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申请人 |
NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORPORATION;MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
ARITA, KISHIO;MITANI, SUSUMU;SAKAI, HIDEO;SUDO, YOSHIKAZU;KOIDE, YOSHITAKA;SATO, HARUZI;HABUKA, YOSHIO;KOZAKAI, TAKASHI;TANAKA, HIROJI |