摘要
实验验证了光纤Bragg光栅(FBG)在非均匀应力下的反射谱展宽效应,并将这种展宽效应应用于轨道列车轮重、位置和轴数的监测。将FBG传感器置于铁轨特定位置,当受非均匀应力时,列车轮重的增加会引起FBG反射谱展宽,反映为检测光强增大。利用模型验证了FBG反射谱分别在温度、均匀应力及非均匀应力下的变化,根据有限元分析模拟铁轨模型的应变分布,进而通过模型实验和实际测试验证了这种方案的可行性。
The broadening effect of the reflective spectrum of fiber Bragg grating（FBG） under uneven strain distribution is verified by experiments,and such a effect is applied to measure the wheel weight,train location and axle counting.The FBG sensor can be placed at the specific location of the rail.The reflective spectrum of the FBG will be broadened under uneven strain induced by the weight of the wheel,so the detected optical power increases.Spectral variations under temperature,even and uneven strain distributions are measured.Based on simulation results of the rail strain distribution using the finite element model,the feasibility of the proposed approach is confirmed by the experiments.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第12期1755-1757,共3页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(60972003)
教育部新世纪优秀人才资助项目(NCET-08-0821)
中央高校基本科研业务费专项资金资助项目(SWJTU09ZT14和SWJTU10ZT05)
