| 摘要 |
PROBLEM TO BE SOLVED: To generate a sectional image conforming to the reality of a reflecting source in an image display device for ultrasonic flaw detection for probing a body to be inspected by tandem method and performing a sectional image display on the basis of the detected reflected echo. SOLUTION: The position of the reflecting source of a detected reflected echo is calculated from the propagating distance (r) calculated from the time from the transmission of ultrasonic wave from a transmitting angle beam probe 12A to the receipt of the reflected echo by a receiving angle beam probe 12B and the sound velocity of the ultrasonic wave; the distance (h) from the surface of a rail abutting on the transmitting and receiving angle beam probes 12A and 12B to the bottom (back surface) thereof; and the position x0±d between the angle beam probes 12A and 12B to perform the sectional image display. |
