Design And Development Of Home Intelligent Lighting System

Lighting is an indispensable part of the development of human society.With the rapid development of society,people have higher pursuits and requirements for the quality of lighting.The home lighting system,which is gradually moving from intelligent to intelligent,has become a kind of lighting system development trend.At present,many smart home lighting systems have been developed at home and abroad,which greatly meets people’s needs for lighting quality.However,due to the limitations of technology,the control chips selected in the early stage have limited information processing capabilities,and can’t be fully compatible with the smart home system that is being vigorously developed now.Moreover,the developed remote control APP has a single control mode,and the user’s operation is not convenient enough to fully meet people’s expectations for The demand for smart lighting.To solve the above problems,we propose a new home intelligent lighting system based on LT3964 and FPGA(Field Programmable Gate Array)chip.The system selects the FPGA chip with parallel processing capability as the control chip,and integrates the intelligent lighting system into the smart home system;The system uses the powerful LT3964 chip as the driver chip.The LT3964 chip not only has dual outputs,but also has a dimming and color matching resolution of up to 8192 levels,which is very suitable for the dimming and color matching of home lighting;The remote terminal applet developed by the system not only supports the user to manually control the status of the lamps remotely,but also can use the intelligent control mode that relies on various sensors to collect information for automatic control.The applet can display the temperature and humidity of the indoor environment,illuminance,whether there is anyone in the room,the status of LED lights and other information in real time,enabling users to intelligently control lamps at any time and anywhere.The main work of this paper is as follows:(1)Designing of overall scheme.During the design,the requirements of the lighting system were analyzed,and the functions that the system needed to be realized were clarified firstly.Then,the system is designed and divided into four modules: control module,drive module,induction module and communication module.The main functions,devices and implementation methods of each module are introduced respectively.Finally,the communication protocol,sensor technology and Verilog HDL programming language used in the design process are briefly introduced.(2)Hardware design and production.After completing the system framework design,the hardware development of the system including the selection of chip,the design and Simulation of driving circuit,the production of heat dissipation plate and RGBW-LED lamp array is designed firstly.This article uses the excellent performance LT3964 as the circuit driver chip,and a powerful and parallel processing FPGA chip as the system information processing and core control chip.After the circuit design is completed,PWM dimming and output power are simulated on the simulation software,and the results show that the design meets the expected requirements.Then,the PCB was drawn and the components were welded to make the driver board.The lamp array was fixed on the heat sink.After the circuit was built,the code was entered for dimming and color adjustment experiments.The test results showed that the design meets the requirements.(3)Designing of Software.The software design of the system mainly involves the programming of Verilog and Java Script,and mainly completed two aspects.One is the page development of the remote control applet,and its communication with the Wi-Fi module.And the other is the communication between the FPGA chip and other modules to realize the FPGA chip information processing and control command sending and receiving.(4)System performance test.After completing the entire system,the performance was tested and the results were analyzed.The results show that the drive circuit of the system has high circuit conversion efficiency and can realize high-resolution dimming and color adjustment.The manual control mode and intelligent control mode of the remote terminal developed by the system can work normally as expected,and the overall performance of the system meets the design requirements.