激光测速技术,是激光技术出现之后从六十年代开始发展起来的一项流速测量技术,它应用激光多普勒效应测量流体速度,直接测量流体而又不直接接触流体,因此,在测量的同时不会干扰和破坏原有的流场特性。它测量的速度范围宽广,可以实现一般无法测量的极低和极高速度的测量,所以它的出现是流速测量技术的一项重大突破。根据上述原理制成的激光流速计,还具有线性刻度、精度高、空间分辨率高、惯性小、动态响应快、方向性强、用途广等优点。所以近十几年来获得了迅速的发展,成 Laser speed measurement technology is a flow measurement technology developed since the 1960s after the advent of laser technology. It uses the laser Doppler effect to measure the fluid velocity and directly measures the fluid without direct contact with the fluid. Therefore, at the same time of measurement Will not interfere with and undermine the original flow field characteristics. It measures a wide range of speeds and enables extremely low and very high speed measurements that are generally unmeasurable, so it is a major breakthrough in flow measurement technology. According to the above principle, the laser flowmeter also has the advantages of linear scale, high precision, high spatial resolution, small inertia, fast dynamic response, strong directivity and wide application. So over the past decade or so has achieved rapid development, into