Among the five kinds of NDE ways (RT, UT, ET, PT, MT), Ultrasonic Testing technology develops very fast because of its merits such as good orientation, strong penetration ability, higher energy and no harm to human health.
The analysis of ultrasonic wave spectrum is one kind of technology, in which the theories and methods of spectrum analyzing were applied. Generally, the information that provided by the original ultrasonic signals is too limited to meet the demand of wave analysis a...