论文部分内容阅读
为了更好地发挥激光测速动态响应快、便于实时显示和非接触测量等优点,研究了这种数字控制大面积连续扫描的后向散射激光多普勒测速机。它由后向散射的光学发射和接收头部、信号处理机和由数控步进马达驱动的机械扫描部分构成。其测速范围0.5～25米/秒,扫描截面x方向和z方向的最大扫描距离都是400毫米。被测截面的深度以及高度上的扫描间距可以予先设定。为便于测量大截面速度剖面,本机采用后向接收,光路一经调好,就可连续测量,大大缩短了测量时间,且便于测点的调整和
In order to give full play to laser speed dynamic response fast, easy to real-time display and non-contact measurement, etc., this digital control of large area continuous scan backscatter laser Doppler tachometer. It consists of a backscattered optical transmit and receive head, a signal processor and a mechanical scanning section driven by a digital stepper motor. The speed range of 0.5 ~ 25 m / s, the scanning cross-section x and z direction of the maximum scan distance is 400 mm. The depth of the measured section and the scanning distance on the height can be preset. In order to facilitate the measurement of large cross-section velocity profile, the machine adopts the backward receiver, the light path can be measured continuously after the light path is adjusted, which greatly shortens the measurement time and facilitates the adjustment of the measuring point