Design And Implementation Of Urban Ground Well Intelligent Monitoring System Based On NB-IoT

With the increasing living needs of the people and the government’s requirements for the safety of urban construction,the problem of urban well safety management has gradually emerged in the construction of smart cities.In order to promote the management of urban wells and facilitate people’s lives,it is imperative to design a city ground intelligent monitoring and management system that can realize large-area,safe,energy-efficient and energy-saving.With the concept of the Internet of Things in the 1990 s,the Internet of Things technology has rapidly emerged and gradually being applied to various fields,becoming one of the most important technologies in people’s life and learning production.Therefore,in the context of the vigorous development of the Internet of Things and smart cities,an urban ground well intelligent monitoring system based on the emerging Internet of Things technology of NB-IoT is designed.The system adopts the STM32 L series low-power chip as the core of the main control module to collect the data such as the tilt angle of the manhole cover,the geographical position,the liquid level in the well and the power supply.The AT command is used to connect to the OneNET platform,and the data is uploaded to the OneNET platform through the NB-IoT wireless communication module according to a custom protocol.The client-side monitoring webpage designed based on the PHP language,it obtains the data push of the OneNET platform by initiating an HTTPS request and calling the API interface of the OneNET platform to realize the display of the data collected by the system terminal and the issuing of the terminal setting instructions.The client-side monitoring webpage designed also can call the API of Baidu map to realize the accurate positioning of the urban ground well on the electronic map.And the system finally realizes the communication and data interaction between the system terminal device,the onenet platform and the client monitoring webpage.This paper introduces the specific hardware design and software development process in detail.The test results show that the system realizes the intelligent monitoring of urban wells,high inclination measurement,liquid level measurement and position location,good real-time alarm,low power consumption and low cost.The system is stable,and it solves the problem of inconvenience caused by the increase of the number of urban wells,realizes effective monitoring of large areas of the city.