相似模拟实验中光纤光栅传感检测研究  

Study on Fiber Bragg Grating Sensing Test in Simulation Experiments

作　　者：魏世明[1] 柴敬[1] 

机构地区：[1]西安科技大学能源学院,西安710054

出　　处：《地下空间与工程学报》2007年第6期1171-1175,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(50374055);陕西省重点实验室科研项目(02JS43)

摘　　要：为探索相似模拟实验新的检测方法,研究了光纤光栅传感技术在相似模拟实验中的应用。采用在模型中埋设光纤光栅传感器的方法,检测采动过程中上覆岩层的应力变化。实验选用1.2m×0.12m平面应力模型,光纤光栅传感器选用无封装裸露光栅,分布有五个光栅点。为作对比分析,两光栅附近埋设压力传感器。结果可知,岩层应力变化可使光栅发生波长漂移,其变化趋势与压力传感器测试结果相一致,可以反映应力的变化规律。光纤光栅传感技术可以被应用于相似模拟实验中的应力检测,这对于提高相似模拟实验的检测手段具有重要的意义。To explore new testing methods in the simulation experiment,the application of fiber Bragg grating sensing is studied.By embedding the fiber Bragg grating sensors in the model,the stress change of rock layers can be tested.The 1.2m×0.12m plane stress model is used,and the sensor is a naked fiber which has five Bragg gratings.To contrast the result,two electric pressure sensors are embedded near two gratings.The result indicates that the stress change of rock layers can make the wavelength drift.It accords with the pressure sensors＇ result and can reflect the stress change law.The fiber Bragg grating sensing technology can be used in stress test of simulation experiment.It has important significance to increasing its testing approach.

关 键 词：相似模拟实验 光纤光栅 应力 波长漂移 

分 类 号：TD32[矿业工程—矿井建设] TP212.4[自动化与计算机技术—检测技术与自动化装置]