在固体中利用激光产生超声波，可作为超声测量和材料无损检测的一种新方法。
Ultrasonic wave excited in medium by laser can be used as a new method of ultrasonic measure and nondestructive testing.
该系统采用A型超声波探伤仪产生超声波脉冲，采用一次脉冲反射法检测棒材。
The principle of detector is that the A-Scan flaw instrument of USL32 beams the ultrasonic to detect the bar material with the method of pulse echo once.
研究了产生超声波的机理及器件性能，分析了超声源驱动电路的组成和工作原理。
Studied the mechanism of how to produce ultrasonic and the functions of the machine, analyzed the ultrasonic driven circuit and its principle of working.
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