CAJ | 학술논문

激光超声在无损检测方面有很大的应用前景。文章中主要介绍了表面波在样本上的激励和探测，通过对表面波信号的处理和分析，发现信号的“透射波波峰①与反射波波峰②峰值比”这一特征量与样本上裂纹的深度有对应关系。这一对应关系，有助于检测到样本上的微小裂纹。
격광초성재무손검측방면유흔대적응용전경。문장중주요개소료표면파재양본상적격려화탐측，통과대표면파신호적처리화분석，발현신호적“투사파파봉①여반사파파봉②봉치비”저일특정량여양본상렬문적심도유대응관계。저일대응관계，유조우검측도양본상적미소렬문。
Laser ultrasonic has great application prospect in nondestructive testing. The article mainly introduced the generation and detection of surface acoustic wave (SAW) on the samples. By the processing and analysis of SAW signal, We found that the signal characteristic : the ratio of transmission wave peak ① and reflection wave peak ② has corresponding relationship with the depth of the cracks on the sample. The corresponding relationship is helpful to detect the tiny crack on the sample.