Abstract. The vehicle LIDAR has been widely used in the fields of three-dimensional city modeling, terrain mapping, the agroforestry ecosystem, military detection, and unmanned driving for its advantages of high resolution, strong anti-interference ability, small volume, and light weight. The measurement accuracy of vehicle LIDARs is influenced by the internal heat source of the system and the external ambient temperature to a great extent. A compact vehicle LIDAR system is designed and analyzed. Combined with the distribution characteristics of the internal heat source of the LIDAR system, the temperature distribution and thermal deformation in the LIDAR system under different external temperatures are analyzed. On this basis, the laser path deviation of the LIDAR system caused by thermal deformation is also analyzed and compared. Finally, when the ambient temperature changes from −10 ° C to 50°C, the deviation of the laser output angle is within ±0.1 mrad by optimizing the design, which meets the requirements of the measurement accuracy of the vehicle’s LIDAR.

中文翻译：

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车载激光雷达系统的结构设计与热分析

摘要。车载激光雷达以其分辨率高、抗干扰能力强、体积小、重量轻等优点，在三维城市建模、地形测绘、农林生态、军事探测、无人驾驶等领域得到广泛应用。车载激光雷达的测量精度在很大程度上受系统内部热源和外部环境温度的影响。设计并分析了紧凑型车辆激光雷达系统。结合激光雷达系统内部热源的分布特点，分析了不同外部温度下激光雷达系统的温度分布和热变形。在此基础上，还对激光雷达系统热变形引起的激光路径偏差进行了分析比较。最后，