Research And Optimization Of Intelligent Lighting Control System Based On ZigBee Network Technology

In recent years,with the development of big data,cloud computing,Internet of Things technology,and the improvement of people's quality of life,people are increasingly demanding LED lighting equipment.On the one hand,LED lighting equipment needs to provide basic lighting functions;on the other hand,it is also necessary to realize the interconnection between people,lighting equipment and other equipment to further promote the arrival of smart cities.In order to overcome the shortcomings of traditional wiring control system,such as complicated wiring construction,poor expandability and single function,intelligent lighting control system emerges as the times require.Among them,the intelligent lighting control system using ZigBee networking technology is especially prominent,which can realize the LED lighting equipment.Fine,intelligent control.ZigBee wireless sensor network technology brings a broad development space and application prospects for intelligent lighting control systems.The main research contents of this dissertation are as follows:(1)A ZigBee channel selection algorithm based on prediction of the channel idle time(PCIT)is proposed.By establishing a hidden Markov model of a known channel state sequence,the historical state information of the channel is used to predict future channel idle probability and time expectation.The idle time of each channel is expected to update the candidate channel sequence of the ZigBee wireless sensor network.The channel idle probability at the next moment determines whether to perform the channel switching operation,so that the ZigBee wireless sensor network works on the quiet channel,avoiding strong WiFi signals.Interference.(2)Design of gateway equipment and terminal equipment for LED intelligent lighting control system.The gateway device takes the chip STM32F107VCT6 as the core,and has the functions of Ethernet,Wi-Fi and ZigBee protocol conversion.The terminal device takes the chip STM32F103C8T6 as the core,and can realize the functions of switching,dimming and collecting environmental information of the device.(3)ZigBee wireless sensor network design.When the ZigBee network coordinator and the terminal node are based on TI CC2530+CC2592,the Z-Stack home automation protocol standard is selected for design,and the networking performance and market compatibility are good,which is conducive to promotion.The LED intelligent lighting control system designed in this dissertation combines relevant design principles and requirements,can realize the network,intelligent,energy-saving,fine control and management of LED lighting equipment,with good compatibility and broad market application prospects.In addition,the proposed ZigBee wireless sensor network channel selection algorithm based on channel idle time prediction can reduce the number of channel switching when strong Wi-Fi signal interference,ensure the communication quality of ZigBee wireless communication network,and enhance the stability of ZigBee wireless sensor network.