影响激光雷达测量精度的因素探讨

激光雷达测量中,除要求知道目标的位置信息外更强调了解目标的散射强度信息,正是它包含着目标的物理特征,因此要求精确测量散射回波强度随距离的变化关系。我们对系统的线性、动态范围、测量精度有较高的要求,所以克服各种干扰、提高测量精度是激光雷达测控系统的首要任务。作者总结了激光雷达研究的实际经验, 对如何选择和合理使用数据采集卡、解决测量信号基线偏移问题、避免近场大信号等一些重要问题进行了讨论。

Discussion on Accuracy of Lidar Measurement

Both information of object position and information of object scattering intensity were required in lidar applications. So the accurate measurements of the function of scattering intensity along range were emphasized. The first thing in measure and control of lidar system was overcome interfere, improve linearity, get more dynamic range and enhance precision of measurement. Some selections and usage of signal acquisitioning card, problems of baseline shift in lidar signals, and how to protect from near-field intense signal of laser scattering were discussed.