Abstract: The red light strip fault of axle counter for signaling system of Hangzhou Metro Line 1 Phase 3 occurred during the early commissioning and operation period of EMU. The headplate of the axle counter is monitored by oscilloscope and the cause of the fault is determined to be external interference. This paper introduces the working principle of axle counter, analyzes the cause of the fault, and introduces the corresponding measures in detail. The test and actual operation performance prove that the fault rate of red light strip can be effectively reduced by adding the double shielding line of traction inverter and brake resistance and adding the current equalizer beside the track, which can be used as a reference scheme for similar fault treatment of other lines.

Key words: 计轴故障, 电磁干扰, 屏蔽接地, 牵引回流

摘要： 杭州地铁1号线三期信号系统在动车调试和运营初期出现计轴红光带故障，经示波器监测计轴磁头板，确定故障原因为外界干扰。介绍计轴的工作原理，重点分析故障产生的原因，详细介绍采取的对应措施。测试及实际运营表现证明车辆增加牵引逆变器与制动电阻双端屏蔽线、轨旁加装均流线可有效降低红光带故障率，可作为其他线路类似故障处理参考方案。

关键词: 计轴故障, 电磁干扰, 屏蔽接地, 牵引回流