| 摘要 |
PROBLEM TO BE SOLVED: To shorten the time related to inspection by reducing the installation number of times and measuring number of times of guided wave sensors by setting a region inspected by one installation of the guided wave sensors to a wide range when the guided wave sensors are sequentially installed in the circumference of a cylindrical member in the whole circumferential inspection by the guided wave sensors installed at a part in the circumference of the cylindrical member. SOLUTION: An ultrasonic inspection method using a guided wave includes the process for using the guided wave sensors 3 arranged to a part in the circumference of the cylindrical member at intervals below the wavelength of a guided wave in a direction of measuring first and second sensor groups 1 and 2 to select the number of the ultrasonic sensors of the first sensor group used in measurement and connecting the ultrasonic sensors of the sensor groups from the ends of the guided wave sensors by the selected ultrasonic sensors, the process for performing transmission and reception by the first sensor group of the guided wave sensors and the same number of the second sensor groups as first ultrasonic sensor groups, the process for processing the receiving signals of the guided wave sensors by a signal processing part, the process for displaying inspection result data on a display unit and the process for attaching the guided wave sensors at the position in the circumference of the cylindrical member. COPYRIGHT: (C)2011,JPO&INPIT
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