中低速磁浮列车悬浮传感器信号传输

分析了中低速磁浮列车悬浮传感器信号传输的衰减、延时以及易受干扰等问题,并提出了解决方案。建立了信号传输系统的简化模型,并按照阻抗匹配原则确定了主要器件参数,防止信号长线缆传输时出现衰减畸变;分析了悬浮系统动态响应允许的传感器信号最大延时,设计并实施了基于振动台的对比测试;针对信号传输电磁环境特点,设计了滤波电路以及屏蔽和接地方案,通过了射频辐射感应抗扰度和脉冲群抗扰度测试。结果表明,悬浮系统动态特性不受信号串行通信延时的影响,所提出的解决方案能实现准确、及时、可靠的信号传输。

Signal Transmission of Suspension Sensor for Middle-low Speed Maglev Train

The attenuation, delay and susceptibility to interference of suspension sensor was analyzed in the process of signal transmission for middle-low speed maglev train, and the solutions were proposed. Firstly, the equivalent model of signal transmission system was established, the working parameters of main devices were optimized according to the principle of impedance matching, from which the attenuation distortion of signal transmission through long cable can be prevented. Secondly, the maximum delay of sensor signal required by the dynamic response of suspension system was analyzed, comparison experiment based on vibration table was also designed and implemented. Finally, according to the characteristics of electromagnetic environment for the signal transmission, the filter circuit and the measures including shielding and grounding were designed, tests such as radio frequency radiation induced by immunity and pulse group immunity were passed. The results show that the dynamic characteristics of suspension system are not affected by the delay of signal serial communication, and the proposed solutions can realize accurate, timely and reliable signal transmission.