摘要
针对矿井坍塌事故的发生设计了一种用于对矿井进行监测的分布式光纤光栅传感器。首先利用ANSYS软件对矿井模型进行有限元分析,找出矿井中的不稳定点进行实时监测。将经过特殊设计的光纤光栅位移传感器安装在矿井中的不稳定点处,当矿井中的不稳定点发生异常时就会表现为反射回来的光纤光栅的中心波长发生偏移,根据反射光中心波长的偏移量与矿井不稳定点的位移成明显的线性关系的特点,可以计算出不稳定点的位移值,进而了解矿井的安全状况。实验结果表明光纤光栅传感器的测量精度可达±0.01%。
Aiming at mine collapse,we design a Fiber Bragg Grating（FBG） sensor network to monitoring the mine. Firstly finite element analysis is made to the mine model to get the instable point in realtime. Then specially designed FBG sensors are installed at the instable points of the mine. When an instable point of the mine is abnormal, the reflected grating center wavelength will change. According to the center shift of the reflected light, the security situation of the mine can be well mastered. Experimental results show that the measurement accuracy of the FBG sensor can reach ：t：0.01%.
出处
《激光与红外》
CAS
CSCD
北大核心
2012年第3期319-323,共5页
Laser & Infrared
关键词
光纤光栅
有限元
矿井
位移
Fiber Bragg Grating
finite element
mine
displacement
