【摘要】 从光纤光栅测温传感原理入手,分析了光纤光栅温度传感器在青藏高原冻土地温监测中的可行性,并在青藏铁路DK1053+600处埋入了15只光纤光栅温度传感器和热敏电阻温度传感器进行了同位对比考核试验。实验结果表明,光纤光栅传感器的测试精度优于0.1℃,能够较好的测量出冻土温度随深度的变化规律,并且具有良好的长期稳定性,从而证明了基于光纤光栅的冻土监测系统的可行性。更多还原

【Abstract】 In this paper the principle of FBG temperature measurement is presented and the feasibility of using FBG sensors in the permafrost area of Qinghai-Tibet plateau analyzed.We embedded fifteen FBG temperature sensors and thermal resistance temperature sensors in the subgrade of Qinghai-Tibet Railroad.A contrast experiment was made while the two kinds of sensors were arranged in the same position.The result of the experiment shows that the accuracy of the FBG temperature sensors is up to 0.1℃,and the FBG sensors can do well in the measurement of the pattern in which the temperature varies with the depth of the permafrost soil.The result also verifies the stability of the FBG sensors in the bad environmental condition of Qinghai-Tibet plateau,and proves the feasibility of the application of FBG sensors and our monitoring system in Qinghai-Tibet railway.更多还原