| 摘要 |
PURPOSE:To reduce the width of a blind sector by making an amplitude- modulated ultrasonic wave incident on a plate material to be examined from an ultrasonic probe to detect a flaws with a ultrasonic wave using plate waves. CONSTITUTION:The amplitude-modulated wave (AM wave) is made incident on a thin plate material to be examined from the ultrasonic probe to detect a flaw with a ultrasonic wave using plate waves. When this AM wave is used, the frequency dispersion is reduced, and the spread of the wave is reduced. As a result, the width of the blind sector in the end part of the plate material is reduced. |
