| At present,with the rapid development of urban infrastructure construction,the investment in road lighting facilities has increased significantly.However,the current mainstream urban lighting facilities management strategy is still based on manual management.Most of the switch control of street lights is triggered by time relays,which lacks flexibility.The daily maintenance of equipment is often dominated by manpower inspections or reports of sudden accidents,which seriously restricts the efficiency of related work such as supervision and maintenance of urban lighting facilities.In this context,it is urgent to establish a city intelligent lighting monitoring and management system to effectively supervise and maintain street lighting facilities.On the other hand,meteorological environmental monitoring and early warning has become an important guarantee for our life safety,and transportation safety is the top priority of our life safety.Therefore,in order to meet the needs of the people’s better life with high quality,the monitoring of meteorological environment has received more and more attention.At the same time,with the rapid development of Internet of Things technology in recent years,the interconnection between many industries has received more and more attention.Based on the combination of road lighting system and Internet of Things,this thesis studies the research status at home and abroad and studies related technologies.Combined with the advantages of multiple nodes and wide distribution of street light network,the environmental monitoring function is incorporated into the road lighting system,and a set of environmental monitoring and road lighting system based on the Internet of Things is proposed,including:1.Environmental monitoring and road lighting system design,a complete environmental monitoring and road lighting system consists of four parts,including: control center,server background,centralized controller,street light.2.The design and implementation of each subsystem are described in detail.The hardware of the node wireless communication control module,communication module and sensor module required by the centralized controller of the street light is introduced in detail.The hardware schematic diagram and PCB of the centralized controller are designed.The street light centralized controller sends the monitoring data to the server background through the GPRS technology,and transmits the received brightness control information to the street light terminal.The street lights constitute a chain network,which use wireless module communication based on Lora communication technology.In addition,this thesis also designs a NB-IoT solution alternative GPRS solution.3.Research on street light control strategy and communication transmission protocol.The control strategy adopts time-division full-power/semi-power street light switch control and controls the road illumination brightness to achieve energy-saving lighting.At the same time,the communication protocol of each subsystem is formulated to ensure the complete transmission of data.Finally,this thesis tests the functions of data acquisition and network transmission of centralized controllers,realizes street light status monitoring,remote control,and adjusts the brightness of lights.The test results show that the modules of the system are functionally correct,robust and reliable,and the design of the whole system is reasonable.The function is perfect,the system runs stably and reliably,and the expected effect is achieved. |
