基于无线传感器网络的气体泄漏源快速定位方法研究

为及时发现大气环境中危险化学品泄漏事故,快速准确判断泄漏源位置,实现有效的监测监控,开发出集气体质量浓度信息采集、时间校准、无线收发等功能于一体的集成探测模块。在此基础上,建立基于无线传感器网络(WSN)的气体泄漏实时监测平台,提出实时监测数据和高斯扩散模型相结合的气体泄漏源快速定位方法。通过开展实际场地泄漏试验,实现气体泄漏源的快速定位,并分析试验系统的敏感度。结果表明:气体泄漏扩散受风力影响很大;合理布局探测器,能有效提高泄漏源定位精度,为危险气体泄漏事故的应急决策提供决策参考。

Study on Fast Gas Source Identification Based on Wireless Sensor Network

For timely discovery of the leakage accidents of hazardous chemicals in the atmosphere and for fast identification of gas release source,so as to monitor and control the leakage accidents effectively,an integrated detection module with functions of gas concentration information collection,time calibration and wireless transmission etc was developed with the development of sensor and wireless network technology.On this basis,a real-time monitoring platform for gas leakage based on WSN was built,and a method for combining real-time monitoring data and the inverse Gaussian diffusion model for fast identification of gas release source was worked out.Actual experiments of gas diffusion were carried out and quickly locating the source was achieved with the method.Meanwhile,the sensitivity of the experiment system was analyzed.The results show that leakage and diffusion of gas are affected greatly by wind,and that rational distribution of detectors might effectively improve the accuracy of gas source identification,which can be used for providing the references for emergency decision of the leakage accidents of hazardous chemicals.