通过动态光弹法观察超声相控阵发射信号在固体中的传播特性, 来确定超声回波信号同相位叠加积分路径。利用荷兰试块对以上方法进行验证, 对获取的22路A扫描超声信号进行处理, 以缺陷或试件边界处为虚拟焦点, 逐点扫描。根据合成信号幅值不同, 反映在图像上的灰度不同, 实现B扫描成像, 初步证明了该方法的可行性。

The scattering behavior of ultrasonic waves in inner obstacle of solid may be observed by the means of dynamic photo elasticity technique, and this will help us to understand the scattering characteristic. We found out ultrasonic receiving wave the integral path by observe transmitting signal of ultrasonic phased array. Then, validating the method using IIW test block, 22 signals A-scan are focused in crack and boundary of specimen, point by point scanning, added signals were different, so gray was different, achieving B-scan imaging, proving the method was available.