基于信号处理技术的超声波无损检测技术

摘要

The ultrasonic nondestructive detection measurement techniques is so successful, it not only based on production and income measures of the wave, but also to the basis and the shrinkage of the waveform of get signal processing. Although the traditional time domain method can successfully sure small cracks, but you can＇t estimate the size of the crack, especially in the strong scattering noise to the influence of the after. Experimental results show that this algorithm not only has excellent performance, still can strong presence of noise in the signal processing, also can succeed estimate the size and location of the crack. In addition, this algorithm can be applied to ultragnnic nondestructive signal data compression.%超声波无损检测技术之所以成功。在于它不仅依据产生和测量所得出的波形。还依据对缩测得到的波形进行的信号处理。虽然传统的时域方法能够成功地确定小裂缝，但不能因此估计裂纹的大小，特别是强大的后向散射噪声的影响。实验研究表明，该算法不仅具有优异的性能，还能够在强噪声存在的情况下进行信号处理，也能够成功估计裂纹的位置和大小。此外。该算法可以应用到超声无损信号的数据压缩中。