铁路联锁专用串口鼠标抗干扰分析及解决办法

Anti-interference Analysis and Solution of Special Serial Mouse for Railway CBI System

铁路联锁专用串口鼠标在运转室使用时易受无线对讲机的射频干扰,影响人-机对话命令下达,涉及行车安全。为加强串口鼠标的抗干扰性,将从串口鼠标CMOS电路、按键电路进行原理分析,并针对电路进行改进处理,加强鼠标抗干扰能力。通过对改进样品实际测试,其抗干扰能力得到有力提升。在经过现场实际运行验证后,对策方案固化为联锁系统串口鼠标按键电路标准要求,为运输安全提供有力支撑。

The special serial mouse for railway CBI system is susceptible to radio frequency interference from radio interphone when it is used in the running room,which affects the command of man-machine conversation and relates to traffi c safety.In order to improve the anti-interference of the serial mouse,the principle of CMOS circuit and keying circuit of the serial mouse is analyzed,and the circuit is improved to strengthen the anti-interference ability of the mouse.Through the actual testing of the improved samples,the anti-interference ability has been enhanced.After the on-site operation verifi cation,the countermeasures are solidifi ed as the standard requirements of serial mouse key circuit of CBI system to provide a strong support for traffi c safety.