Consecutive Polarity Coincidence Based Split-spectrum Processing in Ultrasonic Testing of Coarse Materials

摘要

A novel split-spectrum processing (SSP) method for ultrasonic echo signal was proposed, which employs consecutive polarity coincidence (CPC) as the recovering algorithm and can be used in ultrasonic nondestructive testing to coarse materials. Both numerical simulation and experimental result manifested that, by using this method, the ratio of signal to noise (SNR) can be improved and the flaw echo can be effectively extracted with better performance than other conventional SSP methods.