冷库氨气无线监测系统与泄漏点定位方法

摘要

针对目前冷库氨气泄漏事故频发的现状,设计了基于无线传感器网络的冷库氨气监测与泄漏点定位系统,详细介绍了传感器节点、协调器节点的组成结构,提出了适用于冷库氨气泄漏定位的扩散模型和定位算法,并在不同的监测面积下进行了氨气泄漏定位模拟实验和算法对比分析.实验结果表明:质心算法的相对定位误差为11％左右,低于最近点法50％左右.相对于目前冷库普遍采用的超限报警方式,将无线传感器网络中的定位技术应用到氨气泄漏源定位中有着重要的作用,有利于快速找到泄漏点,及时解决冷库氨气泄漏事故.%Aiming at the frequent accidents of ammonia leakage in the cold storage nowadays, an ammonia monitoring system and leaking localization method based on wireless sensor networks is presented. The designs of the sensor node and coordinator are introduced in detail. The ammonia dispersion model and localization algorithm are proposed. Simulation experiments and analysis on algorithm comparison in different monitoring area. The experimental results show that the relative localization error of the centroid algorithm is about 11 % ,50 % lower than the closed point method. It is conducive to quickly find the leaking position and solve the ammonia leakage accidents in the cold storage.