Intelligent Lighting Control System For Public Buildings Based On Decentralized System

With the rapid development of urbanization in China,the proportion of building energy consumption to total energy consumption is getting higher and higher,and the proportion of lighting energy consumption in large public buildings is also increasing year by year.In view of the problems of the traditional lighting control method in public buildings,such as single function and poor energy saving effect,this paper designs an intelligent lighting control system for public buildings based on the decentralized system.This paper discusses the basic composition and main body structure of decentralized system,adopt the decentralized system to set up public building intelligent lighting control system with two layers of network architecture,the intelligent lighting system includes the decentrslized network mainly for data transmission and network management and the control architecture of the wireless industrial control network for detection and control,realizes to the underlying lighting terminal network control.This paper designs and completes the hardware system of intelligent lighting control system,the intelligent lighting control system with STM32 MCU as a central controller,realizes the collection of light environment parameters through the light sensor,and achieves the lighting terminal switch control,constant illumination light and the scene control,and other functions by controlling the LED drive.The contorl of the intelligent lighting terminal is achieved by control instructions of decentralized system,lighting terminal will upload the information and the switch state of the lamps and lanterns to decentralized system by 433 MHz communication module.According to the overall system design scheme and functional requirements,designs the system software on the basis of hardware circuit design.The communication protocol between the underlying lighting terminal and the uncentered platform is designed,with the configuration of wireless chip and the written of the PWM output program,which realizes the communication function and control function of intelligent lighting terminal and decentralized system.Finally discusses the intelligent lighting control strategy,including the scene control,schedule control,wireless control and single light constant illumination control,etc,and the fuzzy PID control algorithm is used as the single lamp controller.The central processing unit processes the information collected by the sensor and then uses the fuzzy PID operation to drive the LED lamp to realize the indoor constant illumination dimming control.