基于蒸发增强型DTS技术的管道常温液体渗漏监测试验研究

Experimental Study on Liquid Leakage Monitoring of Pipeline at Room Temperature Based on Evaporation-Enhanced DTS Technology

管道渗漏的实时监测和渗漏点的精准定位对保障排水管道安全运行具有重要作用。为了弥补常规管道渗漏监测方法存在的不足,基于分布式温度感测技术,在蒸发式湿度测量原理的基础上提出了一种蒸发增强型分布式温度传感(EEDTS)监测法。通过室内试验研究了EEDTS光缆对管道常温液体渗漏监测的可行性,并探究了风速和湿度对监测结果的影响。试验结果表明:采用EEDTS法监测管道渗漏具有良好的可行性,当环境湿度为38%RH~73.9%RH时,实测温差为2.46~5.13℃,且风速大的环境形成的温差会更大,更有利于管道渗漏的识别。该方法简单易行,具有体积小、抗电磁干扰、分布式、实时监测等优点,为管道常温液体渗漏的监测提供了新的思路。

Real-time monitoring of pipeline leakage and precise location of leakage point play an important role in ensuring the safe operation of water supply and drainage pipeline.In order to make up for the shortcomings of conventional pipeline leakage monitoring methods,an evaporation-enhanced distributed temperature sensing monitoring(EEDTS)method is proposed based on distributed temperature sensing technology and evaporative humidity measurement principle.The feasibility of EEDTS optical cable for monitoring liquid leakage in pipe-lines at room temperature is studied by laboratory test,and the influence of wind speed and relative humidity on monitoring results is investigated.The test results show that EEDTS method has a good feasibility in monitoring pipeline leakage.When the ambient humidity is 38%RH~73.9%RH,the measured temperature difference is 2.46~5.13℃,and the high wind speed will form a larger temperature difference,which is more conducive to the identification of pipeline leakage.This method has the advantages of small volume,anti-electromagnetic in-terference,distributed and real-time monitoring,and a new idea for the monitoring of liquid leakage at room temperature is provided.