分布式光纤测温系统的自校准技术研究  

Study on Self-Calibration of Distributed Optical Fiber Temperature Sensing System

作　　者：申剑光 Shen Jianguang

机构地区：[1]临汾市质量技术监督检验测试所,山西临汾041000

出　　处：《计量与测试技术》2018年第8期31-33,共3页Metrology & Measurement Technique

摘　　要：为提高分布式光纤测温系统的测量精度,本文在DTS中增加了自校准环节,并运用小波去噪算法和累加平均去噪算法对系统采集到的光功率信号进行去噪处理,此外还采用了双数字高精度传感器取平均值的方法得到高精度的参考温度,进一步提高的DTS的测量精度。实验结果表明,改进后的分布式光纤测温系统的测量误差均在±1℃以内,具有较好的工程应用价值和广阔的应用前景。To improve the measurement precision of the distributed optical fiber temperature sensing system,the self-calibration is added in the DTS,and the wavelet denoising algorithm and the cumulative average denoising algorithm are used to denoise the optical power signal collected by the system. In addition,to improve the measurement accuracy of DTS,the method of taking the average value of the dual digital high-precision sensor is also used to obtain the high precision reference temperature. The experimental results show that the measurement error of the improved distributed optical fiber temperature measurement system is within ± 1℃,so it has good engineering application value and broad application prospect.

关 键 词：分布式光纤测温系统 自校准 参考温度 恒温槽 

分 类 号：TK311[动力工程及工程热物理—热能工程]