无线电工程

火灾事故对人民生命财产安全构成了极大的威胁。消防水源作为灭火时的首选，在救援中发挥着重要作用。针对消防供水设施人工管理效率低、工作状态难以实时知晓和人为损坏频繁等问题，设计了一种基于窄带物联网(Narrow Band Internet of Things, NB-IoT)的消防水源数字化感知系统。系统终端采用自主设计，实现消防水源关键信息的实时采集，通过NB-IoT无线通信技术将数据上传至云平台。云平台实现数据预处理、流转与存储，并通过配套的Web端和APP将关键信息进行可视化展示。消防管理人员可远程查看消防水源状态以及巡检记录的信息，出现异常时自动报警推送。利用组合模型对监测终端采集的非用水时水压进行学习，通过设置阈值与时间窗口实现消防用水行为的识别，对消防水系统的维护进行指导。经测试，系统运行稳定、使用便捷，具有良好的实用价值。

Fire accidents pose a great threat to the safety of people's lives and property. Fire water sources, as the first choice for fire operations, play an important role in rescue. In view of low efficiency of manual management of fire water supply facilities, difficulties in acquiring real-time working status and frequent human damage, a fire water source digital perception system based on Narrow Band Internet of Things(NB-IoT) is designed. The terminal of this system adopts self-design to realize real-time collection of key information of fire water sources and uploads data to the cloud platform through NB-IoT wireless communication technology. The cloud platform realizes data preprocessing, circulation and storage, and visualizes key information through the supporting Web terminal and APP. Fire management personnel can remotely view the status of fire water sources and inspection records, and automatically push alarms when abnormalities occur. In addition, the combined model is used to learn water pressure collected by monitoring terminal during non-water use duration, and the fire-fighting behavior is recognized by setting thresholds and time windows, so as to guide the maintenance of fire water system. After testing, the designed system is stable in operation, easy to use, and has good practical value.