为实现隧道内人员的实时定位，保障铁路隧道内施工作业安全，提出一种基于毫米波雷达的铁路隧道人员定位技术，并设计铁路隧道人员定位系统。针对铁路隧道施工环境特点，使用调频连续波工作体制雷达，首先，通过分析雷达反射波的频率、时延、相位等信息，测量目标点的距离、速度、角度，使用杂波消除、目标检测算法获得目标的点云；然后，使用目标跟踪算法对点云进行聚类和跟踪，获取并展示人员的位置、速度和轨迹等信息，当隧道内人员有异常行为时及时发出警告；最后，构建半实物仿真环境，通过在隧道内布设雷达节点、在隧道外布设处理服务器，对该人员定位技术进行测试验证。研究结果表明： 单个雷达节点可以同时跟踪至少6名人员的位置分布和姿态等信息，提出的人员定位技术可满足铁路隧道内人员实时精确定位需求。

To position the personnel in railway tunnels in real time and ensure safe construction, a railway tunnel personnel positioning technology based on millimeter wave radar is proposed. Considering the characteristics of railway tunnel construction environment, a frequencymodulated continuous wave radar is used. First, the distance, velocity, and angle of the target point are measured by analyzing the frequency, time delay, and phase of the radar reflection wave, and the clutter elimination and target detection algorithm are used to obtain the point cloud of the target. Then, a target tracking algorithm is used to cluster and track the point cloud, obtaining and displaying the position, velocity, and trajectory of the personnel, and issuing alarms in a timely manner for abnormal behaviors. Finally, a semiphysical simulation environment is constructed. Radar nodes are deployed inside the tunnel, and processing servers are deployed outside the tunnel to experimentally verify the proposed technical solution. The research results show that a single radar node can simultaneously track the position distribution and posture information of at least six targets. The technical solution can meet the requirements of realtime and precise positioning of personnel in railway tunnels.