Abstract: The loop error "disabled" situation had occurred in the beginning of the operation of the only Personal Rapid Transit (PRT) system in the world--the PRT personal rapid transit system at Heathrow Airport. This paper analysis and process this issue including the cause of the error signal, theoretical analysis, put forward a solution and test verification. Through a lot of exploration and research, the implementation plan of avoiding "ghost signal" in engineering project is determined.

Key words: Ghost signal; Automatic vehicle protection; Electromagnetic interference; Driverless

摘要： 文章就全球唯一个人快速运输系统——希斯罗机场 PRT 个人捷运交通系统在运行之初 产生线圈错误“禁用”的情况进行分析，包括引起该错误信号的原因、理论分析，提出解决 方案并进行试验验证。通过大量探索和研究，确定了工程项目中避免“幽灵信号”产生的实 施方案。

关键词: 幽灵信号；车辆自动防护系统；电磁干扰；无人驾驶