JTUIS series ultrasonic NDT imaging systems were developed combining with the technologies of modern ultrasonic NDT, computer, image processing, numeric control and precise instrument.
Due to the influences of various noises, the signal-to-noise ratio (SNR) and reliability of digital signal are low in ultrasonic non-destructive testing, and it is one of difficult tasks in NDT fields.
Korolev, the oldest worker of the Central Research Institute for Heavy Machinery (TsNIITMASh), has told about some episodes on the initial stages of the ultrasonic NDT development.
Today, the TOFD procedure is used for operational inspections or quality control of structures during production instead of routine radiography and ultrasonic NDT procedures [1].
A novel method of time-frequency analysis, wavelet-packet atomic decomposition based on the matching-pursuit (MP) algorithm, is proposed for improvement of ultrasonic flaw detection during ultrasonic NDT.