无砟轨道板温度高速动态测量技术

无砟轨道板温度静态测量结果无法及时全面反映整条线路的轨道板温度与轨道几何不平顺的关系,因此设计了严寒及高温环境下列车最高速度350 km/h时以250 mm等间距动态测量无砟轨道板温度的系统。该测量系统基于辐射测温原理,通过设计测温响应速率、测量波长、信号放大倍率等关键参数和系统温控逻辑,高速有效采集轨道板微辐射能量。经试验测试,无砟轨道板靶标温度在-40~60℃时测量系统稳定可靠,测量误差小于2℃。

Rapid Dynamic Measurement Technology of Ballastless Track Slab Temperature

The static measurement results of ballastless track slab temperature cannot fully reflect the relationship between the track slab temperature of the whole line and the track geometric irregularities in time,so a system was designed to dynamically measure the temperature of ballastless track slab with 250 mm equal spacing when the maximum speed of train is 350 km/h in severe cold and high temperature environment.Based on the principle of radiation temperature measurement,the system can effectively collect the micro radiation energy of track slab at high speed by designing key parameters such as response rate of temperature measurement,measurement wavelength,signal magnification and system temperature control logic.The test results show that the measurement system is stable and reliable when target temperature of ballastless track slab is in the range of-40~60℃,and the measurement error is less than 2℃.