城市地下天然气管网监测系统研究

发布时间：2018-05-06 02:08

本文选题：天然气地下管网 + 声发射法　；参考：《哈尔滨理工大学》2017年硕士论文

【摘要】：近年来,天然气作为一种干净高效的能源伴随着我国能源结构的调整而愈来愈受到重视。根据天然气的特性,管道作为它的重要运输方式,其安全性也愈来愈受到人们的关注。我国正处于城镇化加速发展的时期,城市地下天然气管网作为其重要组成部分也在飞速发展。由于地下的环境比较复杂加上气体泄漏不直观,具有很强的隐蔽性,如果发生泄漏有着很大的安全隐患。因此,研究城市地下天然气管网监测系统及时发现天然气管道泄漏,最大限度的降低人员与财产损失,对于实现智慧城市有着深远的意义。本文对城市地下天然气管网监测系统目前存在的问题进行深入研究,在详细分析国内外该领域相关技术研究现状的基础上,设计了城市地下天然气管网监测系统。系统根据设计要求对安装在管道上的传感器声发射信号采集,该信号经过通信分站的处理,通过系统的CAN总线网络传输至地面监控分站,然后监控分站采用工业以太网与上位机进行远距离信息传输,上位机将接收到的是否发生泄漏信息显示出来,从而完成对城市地下天然气管网系统的实时监测。本系统采用分层的结构对系统进行分部分处理,主要包括传感器数据采集模块、通信分站模块以及CAN转以太网模块等。传感器数据采集模块通过传感器获得现场信号,完成了现场信号进行先放大再滤波等处理,从而便于对其作模数转换;通信分站模块采用STM32微处理器作为主控制器,主要对数据的存储和预处理,即对传感器信号的编码以及时间信息等转发,将地下天然气管道信号通过CAN总线传输到地面监控分站;CAN转以太网模块主要对由通信分站组成的CAN总线网络模式向以太网通信方式的转换,完成长远距离的传输。系统通信部分经过大量的仿真测试,达到预期的设计要求,具有较好的稳定性和实时性。
[Abstract]:In recent years, natural gas, as a clean and efficient energy, has been paid more and more attention along with the adjustment of energy structure in China. According to the characteristics of natural gas, pipeline as an important mode of transportation, its safety has been paid more and more attention. China is in the period of accelerating urbanization, urban underground natural gas network as an important part of the rapid development. Because the underground environment is complicated and the gas leakage is not intuitionistic, it has strong concealment. Therefore, it is of great significance to study the monitoring system of urban underground natural gas network to discover the leakage of natural gas pipeline in time, and to minimize the loss of personnel and property to the realization of intelligent city. In this paper, the existing problems of urban underground natural gas pipeline network monitoring system are studied in depth. Based on the detailed analysis of domestic and foreign related technology research status, the urban underground natural gas pipeline network monitoring system is designed. According to the design requirements, the system collects the acoustic emission signal of the sensor installed on the pipeline. The signal is processed by the communication sub-station and transmitted to the ground monitoring sub-station through the CAN bus network of the system. Then the monitoring sub-station uses industrial Ethernet to transmit the remote information with the upper computer, and the upper computer displays the leakage information received, thus the real-time monitoring of urban underground natural gas network system is completed. The system uses hierarchical structure to deal with the system, including sensor data acquisition module, communication sub-station module and CAN to Ethernet module. The sensor data acquisition module obtains the field signal through the sensor, and completes the processing of the field signal, such as amplifying and filtering the field signal first, so as to facilitate the analog-to-digital conversion. The communication sub-station module adopts STM32 microprocessor as the main controller. It mainly stores and preprocesses the data, that is, encode the sensor signal and transmit the time information. The underground natural gas pipeline signal is transmitted to the ground monitoring sub-station by CAN bus. The can to Ethernet module mainly converts the CAN bus network mode composed by the communication sub-station to the Ethernet communication mode to complete the long distance transmission. After a lot of simulation tests, the communication part of the system meets the expected design requirements and has good stability and real-time performance.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU996.8

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