Department of Geologic Sciences and Engineering, University of Nevada, Reno, MS 172, Reno, NV 89557, USA.
Sensors (Basel). 2011;11(11):10859-79. doi: 10.3390/s111110859. Epub 2011 Nov 21.
Hydrologic research is a very demanding application of fiber-optic distributed temperature sensing (DTS) in terms of precision, accuracy and calibration. The physics behind the most frequently used DTS instruments are considered as they apply to four calibration methods for single-ended DTS installations. The new methods presented are more accurate than the instrument-calibrated data, achieving accuracies on the order of tenths of a degree root mean square error (RMSE) and mean bias. Effects of localized non-uniformities that violate the assumptions of single-ended calibration data are explored and quantified. Experimental design considerations such as selection of integration times or selection of the length of the reference sections are discussed, and the impacts of these considerations on calibrated temperatures are explored in two case studies.
水文学研究是光纤分布式温度传感 (DTS) 的一项非常苛刻的应用，需要高精度、准确性和校准。考虑到最常用的 DTS 仪器背后的物理原理，它们适用于四种单端 DTS 安装的校准方法。所提出的新方法比仪器校准数据更准确，达到了几度均方根误差 (RMSE) 和平均偏差的精度。研究并量化了违反单端校准数据假设的局部不均匀性的影响。讨论了实验设计考虑因素，例如积分时间的选择或参考部分长度的选择，以及这些考虑因素对校准温度的影响，在两个案例研究中进行了探讨。
