基于BOTDA的分布式光纤温度传感测量实验研究

Experimental study on distributed optical fiber temperature sensing and measurement system based on BOTDA

为了进一步提高布里渊光时域分析(BOTDA)的测温精度,基于BOTDA的原理,构建了温度传感测量系统。测温实验发现,测温光纤的保护层厚度影响了其测温的精度;裸纤直接测温的精度较高,但也易受外界影响,且易断,故改进光纤的保护层可以提高其测温精度。提出一种将导热硅脂涂敷在光纤上进行测温试验的方法,提高了温度测量的准确性。

To further improve temperature measurement precision of Brillouin optical time-domain analysis （BOTDA）,a temperature sensing and measurement system which based on BOTDA is constructed.It is found that the protective layer of temperature measuring optical fiber affects precision of temperature measurement,and the bare fiber has higher precision,but also is affected easily by environment and is easily broken,so improve protective layer of optical fiber can improve measurement precision.Propose a kind of temperature measurement method which uses thermal grease apply on optical fiber,improves accuracy of temperature measurement.