城市轨道交通信号系统的典型测速定位方案比较

针对城市轨道交通信号系统测速定位,详细分析了常用的轮轴速度传感器、多普勒雷达及加速度计的测速原理,并深入分析了各传感器的误差影响因素、失效模式以及传感器的复杂性。对目前常用的4种组合测速定位方案,从方案的测量精度、成本、系统可靠性、设备安装、安全性评估等方面进行了分析比较,给出了各种测速定位方案的优缺点。分析比较结果表明,速度传感器+加速度计+应答器的组合测速定位方案具有一定的发展优势。

Comparison of Urban Rail Transit Signaling System Train Velocity Measurement and Positioning Schemes

Targeting the velocity measurement and positioning of urban rail transit signaling system,the measurement principle of commonly used wheel speed sensor,Doppler radar and accelerometer is analyzed in detail,and the measurement error factors,failure modes,and complexity of sensors are described in depth.Four typical train velocity measurement and positioning schemes are comparatively analyzed from aspects including measurement precision,costs,system reliability,equipment installation and safety evaluation.The merits and defects of each scheme are described.According to the analysis results,the scheme of combination of wheel speed sensor,accelerometer and transponder has the promising prospect.