本文提出一种利用脉冲激光产生可重复的宽带标准声源、对超声换能器的速度灵敏度进行标定的新方法—激光超声法。
A new method for calibration of velocity sensitivity of ultrasonic transducers with a wide band standard acoustic source generated by a pulsed laser is proposed.
重点介绍脉冲式染料激光器的波长覆盖范围及用光栅和法布里-珀罗标准具压缩谱线宽度等研究工作、实验结果及测试方法。
Emphasis is put on the experimental research on its tunable range and the bandwidth narrowing with a diffraction grating and a Fabry-Perot etalon.
该系统通过JFD-301校准脉冲发生器对标准波形进行校准及比较法，可测量出局部放电的视在电荷量。
Owe system the amounts adjusting a circuit carrying out calibration and comparison method on standard wave form , may measure out part discharging looking at in electric charge by JFD-301.
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