基于误差补偿的分布式喇曼温度传感器(英文)

Resolution Improved Raman Distributed Temperature Sensors Based on Error Compensation

基于分布式喇曼传感器,对斯托克斯光和反斯托克斯光两路信号的同步问题进行了合理假设,并给出相应的补偿方法.为了进一步提高解调温度的准确度,采用温度解调系统及温度解调软件对实验系统收集到的数据进行分析.给出了实际开发分布式喇曼传感系统中补偿后离散式的温度解调算法,对该算法解调出来的温度进行实验测试.结果表明:解调温度的误差和监测点到光纤光注射端的距离及相应监测点待解调的温度值均有线性关系.该温度传感器空间分辨率达1m,对于整个2km的探测光纤,即使考虑到温控箱拥有0.5℃左右温度误差,整个实验系统的温度解调误差也在1℃左右.

Based on the real Raman distributed temperature application system,the synchronization problem between the Stokes and the anti-Stokes light was assumed and the correspending compensation method was proposed.In order to improve the temperature accrucy,the temperature demodulation system and the temperature demodulation software were used to collected the expermental dates.And a real Raman distributed temperature application system with the discrete conpensation demodulated algorithm was experimented.The results show that the error is a linear relationship with the fiber length and the temperature of the detection point.The temperature accuracy of the temperature sensor can reach 1mfor the whole mutimode sensing fiber with the length of 2km,even considering the temperature error of 0.5℃,the error of the whole system is 1℃.