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最近,日本科学技术厅金属材料技术研究所采用脉冲激光使材料内部产生超声波(弹性波),然后,使用另一种激光将所产生的超声波检测,从而使材料内部的缺陷可以在非接触状态下进行检测。这项新技术是利用比较强的激光照射材料而使材料受热膨胀,然后通过传递、反射,产生干涉条纹,再利用激光检测其缺陷的大小、位置。目前,使用超声波探伤技术正在广泛地
Recently, the Japan Institute of Science and Technology Metal Materials Technology Institute uses pulsed lasers to produce ultrasonic (elastic waves) within the material, and then the use of another laser to produce ultrasonic waves so that defects within the material can be in a non-contact state Test. The new technology is the use of relatively strong laser materials to make the material heated expansion, and then through the transmission, reflection, interference fringes, and then use the laser to detect the size of defects, location. At present, the use of ultrasonic flaw detection technology is widespread