PIV测速中低功率激光器的应用

Application of low power laser in particle image velocimetry

在PIV测速技术中 ,光源是最关键的技术 ,它决定着能否获得高品质流场粒子图像 ,以得到准确的流场流速数据 ,而采用大功率激光光源 ,不仅昂贵 ,而且使用不方便 ,本文采用像增强技术 ,实现了 5 0mW低功率激光照明条件下的PIV测速 ;采用声光调制技术 ,研制出可调数据同步脉冲控制器取得与在高功率脉冲光源照明条件下同样的像质效果。并在实际涡旋流场测试中得到应用 。

Luminaire was a crucial technology in PIV.It determined to acquire good image and accurate velocity data.But high-power laser was expensive and inconvenient.This paper adopts image amplification to achieve PIV in illumination using 50mW lower-power laser and acoustic-light modulate to achieve the same image in high-power laser.There are good results in vortex measurement.