用单光子激光雷达实现绕过障碍物感知,让机器人看得更远。
Enhancing Autonomous Navigation by Imaging Hidden Objects using Single-Photon LiDAR
- 通过多跳光信号捕捉隐藏区域的三维信息
- 在真实走廊中成功导航避开隐藏障碍物
- 适合需要复杂环境感知的移动机器人研究
在可视性受限的环境中实现稳健的自主导航仍是机器人领域的重要挑战。本文提出一种基于单光子激光雷达(SPAD-based LiDAR)的非视域(NLOS)感知新方法,使移动机器人能够“绕过拐角”探测隐藏物体,从而扩展感知范围且无需额外基础设施。我们设计了三模块流程:(1) 感知模块,利用单光子探测器采集多跳光信号直方图;(2) 识别模块,通过卷积神经网络从直方图重建隐藏区域的占用地图;(3) 控制模块,根据估计的占用情况规划安全路径。我们在仿真和真实移动机器人实验中验证了该方法,实验场景为带隐藏障碍物的L形走廊。本工作首次实现了基于NLOS成像的自主导航实验演示,为复杂环境中更安全高效的机器人系统奠定基础。此外,我们还提出一种融合动态特性的瞬态渲染框架,用于模拟NLOS场景,推动该领域的后续研究。
原文摘要 · Abstract (English)
Robust autonomous navigation in environments with limited visibility remains a critical challenge in robotics. We present a novel approach that leverages Non-Line-of-Sight (NLOS) sensing using single-photon LiDAR to improve visibility and enhance autonomous navigation. Our method enables mobile robots to "see around corners" by utilizing multi-bounce light information, effectively expanding their perceptual range without additional infrastructure. We propose a three-module pipeline: (1) Sensing, which captures multi-bounce histograms using SPAD-based LiDAR; (2) Perception, which estimates occupancy maps of hidden regions from these histograms using a convolutional neural network; and (3) Control, which allows a robot to follow safe paths based on the estimated occupancy. We evaluate our approach through simulations and real-world experiments on a mobile robot navigating an L-shaped corridor with hidden obstacles. Our work represents the first experimental demonstration of NLOS imaging for autonomous navigation, paving the way for safer and more efficient robotic systems operating in complex environments. We also contribute a novel dynamics-integrated transient rendering framework for simulating NLOS scenarios, facilitating future research in this domain.
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