Signal Processing for Acoustic Emission and Ultrasonic Testing

该项目建议将处理算法和可编程集成电路的最新发展应用于无损评估(NDE)。介绍了无损检测的两个研究领域：数据采集和缺陷检测。在数据采集方面，提出了采用自适应波形编码来降低采样率和数字化字长，以及使用信号抽取来降低采样率。这两个研究领域的意义在于，在保持信号保真度的情况下，较低的采样率意味着更容易处理，并且减少的工作大小需要较小的数据存储。在探伤方面，提出了利用信号相关来提高脉冲回波探伤分辨率的研究。

This project proposes to apply recent advances in the development of processing algorithms and programmable integrated circuits to nondestructive evaluation (NDE). Two NDE research areas are addressed, data acquisition and flaw detection. In data acquisition, it is proposed to investigate the use of adaptive waveform coding to reduce the sampling rate and the digitization word size and the use of signal decimation to reduce sampling rate. The significance of these two areas of research is that a lower sampling rate, provided signal fidelity is preserved, implies easier processing, and a reduced work size requires smaller data storage. In flaw detection, it is proposed to carry out research in improving the resolution in pulse echo flaw detection by signal correlation.