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Dimensional decomposition and equivalent generation of the LiDAR return information
Optical Engineering ( IF 1.3 ) Pub Date : 2021-12-28 , DOI: 10.1117/1.oe.59.12.124108
Yi Tian 1 , Chaofeng Wang 1 , Yulin Meng 1 , Shuaihao Wang 1 , Xiaochen Feng 1 , Yan Zhang 1 , Yexin Zhang 1 , Fan Li 1 , Li Zhang 1
Affiliation  

Abstract. Light detection and ranging (LiDAR) return signal generation technology applied in the LiDAR indoor test and simulation is significant to design, develop, test, and validate a LiDAR’s capability and performance. To generate a target’s information carried by the return signal, the dimensional decomposition and equivalent generation method of the LiDAR return signal are proposed. The target four-dimensional (4D) information is decomposed into one-dimensional (1D) intensity information, 1D range information, and two-dimensional (2D) angle–angle spatial information. The 1D intensity information is simulated by the absorption of prism pairs, while the 1D range information is simulated by the combination of electrical and optical time delay. The 2D angle–angle spatial information is implemented by the stack of segmented digital mirror array device slice images in sequence. Moreover, a LiDAR return scene projector (LRSP) prototype is developed and its performance is measured. The results show that its energy dynamic range is 51.25 dB. The distance simulation range is 240.15 m to 22.5 km (1.601 to 150 μs). The simulation accuracy of the target’s depth is <9 cm (0.6 ns). The spatial resolution of 64 × 64 pixels is verified by vertical and horizontal line pairs test. Because the LRSP has 12 image slices, its resolution is 64 × 64 × 12 pixels in three-dimensional (3D) space. Finally, the prototype is demonstrated by reconstructing a staircase. The energy dynamic and 2D angle-angle spatial resolution are improved significantly compared with the existing LRSPs.

中文翻译:

LiDAR返回信息的维度分解与等价生成

摘要。应用于 LiDAR 室内测试和模拟的光探测和测距 (LiDAR) 返回信号生成技术对于设计、开发、测试和验证 LiDAR 的能力和性能具有重要意义。为了生成回波信号携带的目标信息,提出了激光雷达回波信号的维数分解和等效生成方法。目标四维(4D)信息被分解为一维(1D)强度信息、一维距离信息和二维(2D)角-角空间信息。一维强度信息是通过棱镜对的吸收来模拟的,而一维距离信息是通过电和光时延相结合来模拟的。二维角-角空间信息是通过按顺序堆叠分段的数字镜阵列器件切片图像来实现的。此外,还开发了激光雷达返回场景投影仪 (LRSP) 原型并对其性能进行了测量。结果表明其能量动态范围为51.25 dB。距离模拟范围为 240.15 m 至 22.5 km(1.601 至 150 μs)。目标深度的模拟精度<9 cm (0.6 ns)。64×64像素的空间分辨率通过纵横线对测试验证。由于 LRSP 有 12 个图像切片,因此其在三维 (3D) 空间中的分辨率为 64 × 64 × 12 像素。最后,通过重建楼梯来演示原型。与现有的 LRSP 相比,能量动态和 2D 角-角空间分辨率显着提高。
更新日期:2021-12-28
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