Design of Intelligent Manhole Cover Monitoring System Based on Narrow Band Internet of Things

With the implementation of the national big data strategy and the continuous development of "Digital China",the construction of smart cities has been given new connotations and requirements.As a core part of the infrastructure, urban manhole covers have a large audience and wide distribution, but due to the lack of an efficient and intelligent unified control system, various safety accidents have occurred frequently in this area in recent years.According to the current situation and development needs of manhole cover management in smart cities, the thesis designs a intelligent manhole cover management and control system based on Narrow Band Internet of Things( NB-IoT). In the part of terminal data acquisition, by optimizing the structure of sensor circuit, the type of manhole cover information acquisition is added. The collected node information data is transmitted to the server through NB-IoT in a low-power long-distance working mode. The server side completes the visualization of the collected data and provides rich control functions on the user's operation interface. The test results show that the design of the system is advanced in technology, accurate in judging the state of the manhole cover, and is safe and reliable. In addition, it has some practical value of engineering.