| 摘要 |
PROBLEM TO BE SOLVED: To provide a nondestructive inspection system for accurately and quickly measuring the sectional change of an inspection target, due to aging thinness caused by defects, corrosion, or the like, with few number of times. SOLUTION: The inspection target is pinched, a transmission means 12 and a reception means 14 are arranged, a symmetrical high-frequency signal is transmitted from a transmission means. An asymmetrical high-frequency signal received by the reception means is inverted on a time axis 22 and is inputted into the transmission means. The transmission means transmits the asymmetrical high-frequency signal inputted from the reception means, and the reception means receives the signal. The amount of decrease in the thickness and an abnormal section are analyzed quantitatively 36, according to the degree of asymmetry of the high-frequency signal received.
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