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目的是解决激光器出光稳定性问题,3D激光雷达系统通过计算激光的飞行时间(Time Of Flight,TOF)得到目标的距离信息,经过处理所获得的数据信息恢复出探测目标的三维图像。激光雷达系统常用的调Q激光器存在着出光抖动的问题,而激光器的出光选通抖动直接影响了成像效果,所以解决激光器出光稳定性问题成为了提高TOF激光雷达性能的主要目标之一。方法是通过设计一种新型外置出光选通控制器,由高精度电机控制编码器高速旋转产生光通断信号,光电对管(光遮断器)将激光器发出的光脉冲信号转换为TTL触发电频信号来启动接收端数据采集器工作。结果获得更加稳定的选通时间。结论是这种控制方式减弱了3D激光雷达光选通时间的抖动,增强了3D激光雷达系统实时监测和可控性,使得激光雷达系统发射端能够长期稳定有效的工作。
The purpose is to solve the problem of laser light stability. The 3D laser radar system obtains the distance information of the target by calculating the time of flight (TOF) of the laser and reconstructs the three-dimensional image of the target after processing. Q-switched lasers commonly used in laser radar systems have the problem of optical jitter. However, the light-emitting strobe jitter of the laser directly affects the imaging performance. Therefore, solving the problem of laser light stability has become one of the main goals of improving the performance of TOF laser radars. By designing a new type of external light-emitting gating controller, the high-precision motor control encoder rotates at high speed to generate the light-on signal, and the light-to-tube (photo interrupter) converts the light pulse signal from the laser into TTL triggering power Frequency signal to start receiving data collector work. The result is a more stable gating time. The conclusion is that this control method reduces the dithering time of the 3D lidar and improves the real-time monitoring and controllability of the 3D lidar system so that the launch of the lidar system can work steadily and effectively for a long time.