Compared with the petrochemical industry,thermal pipeline leak detection is far from reaching the level of information technology and automated.In this paper,a new type of thermal pipeline leakage monitoring system under the internet of things technology is proposed to realize the real-time acquisition,transmission,storage and calculation of pipeline temperature data for the purpose of remote monitoring and leakage positioning.At the same time,in order to improve the pipeline leakage positioning accuracy,this paper proposed a kind of spiral winding wiring of fiber and calculation methods,which can effectively reduce the measurement dead zone and increase the number of measurement points.When the total length of the fiber within the unit pitch is greater than S,and the pitch is set to less than 4 D(S is the spatial resolution of the system,D is the inner tube diameter) to reach the upper and lower limits,the temperature point on the pipeline can achieve a better degree of distribution.Combined with the experimental analysis,the thermal pipeline leakage monitoring system of this kind of wiring can improve the precision of pipeline leakage and achieve good detection effect while realizing real-time monitoring and leakage positioning.%相比于石油化工行业,热力管道的泄漏检测远远还没达到信息化、自动化的水平.该文针对城市热力管道的行业发展现状,提出一种在物联网技术下的新型热力管道泄漏监测系统,能够实现管线温度数据的实时采集、传输、存储、计算,达到远程监控和泄漏定位的目的.同时,为了提高管道泄漏定位精度,给出一种螺旋缠绕的光纤布线方式和计算方法,能够有效减少测量盲区和增加测量点数量.当单位螺距内光纤总长大于S,且螺距设置小于4D(S为系统的空间分辨率,D为内管管径)分别达到上下限,管道上的温度点能够达到较好的分布式程度.结合具体试验和仿真分析,该种布线方式的热力管道泄漏监测系统在实现实时监测和泄漏定位的同时,能够提高管线泄漏定位精度,具有良好的检测效果.
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