基于光纤分布式测温的热力管道泄漏定位系统  

Thermal pipeline-leakage locating system based on distributed optical-fiber temperature-measurement

作　　者：李硕 侯墨语 赵小芬 王佳敏 于滋堃 王纪强 LI Shuo;HOU Moyu;ZHAO Xiaofen;WANG Jiamin;YU Zikun;WANG Jiqiang(Laser Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;Jining Sihe Heating Co.,Ltd.,Jining 272000,China)

机构地区：[1]齐鲁工业大学(山东省科学院)[KG2]山东省科学院激光研究所,山东济南250014 [2]济宁四和供热有限公司,山东济宁272000

出　　处：《山东科学》2023年第1期84-89,共6页Shandong Science

基　　金：山东省自然基金重点项目(ZR2020KC012);济南市“高校20条”项目(2020GXRC032);济南市“新高校20条”项目(2021GXRC037);山东省重大科技创新工程(2019JZZY020501)。

摘　　要：针对传统热力管道泄漏巡检方式存在的准确度不高、抗干扰能力差等不足,采用光纤分布式测温的方法测量热力管道沿线温度场,当发生泄漏时,管道中的热水或蒸汽会流出并改变泄漏点周围的温度场,系统可以快速捕捉温度变化并实时定位泄漏点。实验检测系统性能指标为温度精度(温度测量值与真实值间的误差)±1℃,空间分辨率≤2 m,目前已成功应用于济宁运河电厂热力管道的检测中,精确地测量了热力管道沿线15 km的温度变化,并成功对一处泄漏行为进行了报警,表明分布式光纤测温系统在热力管道泄漏监测领域具有广阔的应用前景。Aiming to resolve the deficiencies of low accuracy and poor anti-interference ability of traditional thermal pipeline-leakage detection methods, an distributed optical-fiber temperature-measurement system combined with the pipeline-leakage model is adopted herein to measure the temperature field along the thermal pipeline.When the leakage occurs, hot water or steam in the pipeline will flow out and change the temperature field around the leakage point, and the system can rapidly catch the temperature change and locate the leakage. The experimental results show that the temperature accuracy,which is the error between the measuring temperature value and the true value, is within ±1 ℃ and the spatial resolution is no more than 2 m.The system has been successfully applied to the thermal pipeline of the Jining Canal Power Plant, accurately measured the temperature variation along a 15 km thermal pipeline and precisely alerted a leakage, indicating that the distributed optical-fiber temperature-measurement system has a broad application prospect in the field of thermal pipeline-leakage monitoring.

关 键 词：热力管道 泄漏定位 光纤分布式测温 空间分辨率 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]