高速列车车轴温度测试方案设计.docVIP

摘要 近年来我国高速铁路迅猛发展，列车运行速度己经达到了350km/h 。随之可能遇到的各种危险因素出越来越多，其中列车在运行过程中，机车车辆与钢轨的冲击、动力效应和振动，会导数车辆各轴承的发热。当列车轴承磨损和产生缺陷时，不正常发热增大。轻则造成机损影响车辆的正常达行．轻则造成疲劳破坏重则直接等致火车发生故障翻车．造成巨大的生命和财产损失，严服影响到铁路运输安全。 本文在对国内外光纤光栅传感技术及其解调方案进行深入分析的基础上，学习研究了光栅光纤的成栅技术、封装技术和车轴测温有关知识；分析温度与（FBG）产生的信号的关系；并确定了光纤光栅测量火车车轴的总体方案以及宽带光源、光栅传感器，光纤耦合器等技术参数及型号、光纤光栅反射信号的解调技术的探索。 重点分析了监测系统的搭建以及相关器件的原理，并在一定条件下对测温方案进行实验验证，为进一步研究打下了基础。 关键字：光栅光纤、光纤耦合器、宽带光源、温度监测系统 Abstract The rapid development of the train speed has been reached 350km / h in China in recent years .Followed is a variety of risk factors that may be encountered more and more, where the train is running, rolling stock and rail impact, dynamic effects and vibration, will lead the number of vehicles bearing the heat.When the train bearing wear and produce defects ,then the unusual heat increases. Ranging from causing engine damage affect the vehicles normal up to the line. The reported cause fatigue failure even eager shaft is directly caused by the train failure overturned. Diego into a huge life and property losses, the impact of strict service to rail transportation security. In-depth analysis on domestic and international fiber grating sensor demodulation scheme based on study and research into the gate of the grating fiber-optic technology. Fiber Fusion Splicer and packaging technology and the knowledge of the axle temperature; analysis of temperature and (FBG) the relationship of the signal; and determine the general scheme of the fiber grating measurement of train axles, as well as broadband light source, grating sensors, fiber optic couplers and other technical parameters and models, signal demodulation of fiber grating technology, exploration, and the corresponding optical path circuit design. Analyzed the structures of the monitoring system and related devices, principles, and under certain conditions, the temperature program experiment laid the foundation for further study. Keywords: grating fiber-optic ,fiber coupler, broadband light