基于NB-IoT和OTA的云上智能井盖监控系统设计

Design of Cloud Intelligent Manhole Cover Monitoring System Based on NB-IoT and OTA

针对智慧城市建设中城市排水管网各类井盖出现的安全隐患问题及管理难等弊端,提出并实现了基于NB-IoT和OTA的云上智能井盖监控系统。硬件上选用国产低功耗蓝牙芯片HS6621进行电路设计,采集井盖的位置、姿态和井下水位、溢水等信息,通过NB-IoT模块上报云平台;软件上采用微服务技术架构,将井盖的实时监测及日常维护管理等任务分解到不同的服务中,并利用OTA空中下载技术完成终端固件远程升级;经测试,终端硬件整机功耗为98.25μA,符合低功耗设计要求,终端可正常上报监测数据并及时触发报警,能达到实时监控效果;通过管理软件进行工单派发、任务验收和固件升级等日常管理,可降低终端维护成本,有效提高城市智能化管理水平,改善落后的管理方式。

Aiming at the disadvantages of potential safety hazards and difficult management for various manhole covers of urban drainage pipe networks in the construction of smart cities,a cloud intelligent manhole cover monitoring system based on NB-IoT and OTA is proposed and implemented.Domestic Bluetooth low energy chip HS6621 is adopted to the hardware of the system,the information of position,attitude,downhole water level,overflow for the manhole cover is collected to report the cloud platform through the NB-IoT module.The micro service technology architecture of the software is adopted to decompose tasks such as the real-time monitoring and daily maintenance management of the manhole covers into different services,and OTA download technology is used to to complete the remote firmware upgrade of terminals.After testing,the current consumption of the terminal hardware is 98.25μA,which meets the design requirements of low power consumption.The terminal can normally report the monitoring data and trigger the alarm in time,which can achieve real-time monitoring effect.The daily stages of work order distribution,task acceptance and firmware upgrade can reduce terminal maintenance costs through the management software,effectively improve the level of urban intelligent management,and improve outdated management methods.