基于负压力波法的城市天燃气管线远程监控系统

摘要

由于城市中天然气管线铺设非常广泛,但是对于深埋地下的天然气管道的监控存在着精度低,定位不准确和无法实现完全的远程监控等问题.利用负压力波法的修正算法对管线泄漏情况进行有效识别并进行准确定位.系统使用Daubechies波为小波基,利用修正的Mallat快速小波算法对信号有效降噪,提高了系统检测泄漏点的灵敏度,增加了泄漏点定位的准确性.整个系统融合了无线通讯技术(GSM)、PLC技术、总线技术、CLinux 服务器和嵌入式WEB技术和GPS等技术,实现了对天然气管道的远程监控、数据分析和处理等功能.%As we know the gas pipeline laying is very extensive in city, but for deep buried gas pipeline monitoring has low accuracy, positioning is not accurate and can not be realized fully remote monitoring and other issues. This paper uses negative pressure wave correction algorithm for pipeline leakage efficiently and accurately positioning. System using Daubechies wave wavelet base, using the modified Mallat fast wavelet algorithm for signal noise reduction, improve the system for detecting leakage sensitivity, increased leakage localization accuracy. On this basis, system integration of the wireless communication technology ( GSM ), PLC technology, bus technology, Clinux server and embedded WEB technology and GPS technology, to achieve a natural gas pipeline for remote monitoring, data analysis and processing function.