Research On Intelligent Control Technology Based On Visible Light Communication System

The traditional wireless communication system using the radio frequency or microwave to complete the communication process,in the indoor visible light communication system,the white light LED was using to meet the need of light signal transmission and indoor lighting.Optical transmitter will modulate the information which needed to send and load it to the white light LED,then we can transmit information to the receiver with high speed on-off light signal.Indoor visible light communication can achieve high speed communication demand under stable lighting.It has the advantages of wide bandwidth,rich spectrum resources,energy saving and so on.So it is generally considered to be a new information transmission technology.It was against this background,we collected in-depth information about visible and light communication at home and abroad,and got in-depth understanding of it's structure and working characteristics.Analyzed the architecture of the visible light communication system.Based on the characteristics of LED and the knowledge of communication system architecture,a visible light communication system with IEEE802.15.7 protocol and star topology is designed.Then it is applied to the field of intelligent control.The main work are as follows:1.Analyzing the short distance wireless communication technology background and the latest research progress of indoor visible light communication technology both here and abroad;2.Using the knowledge of electronic informatics to design the architecture of the full duplex visible light communication system,hardware circuit of the optical transmitter and optical receiver are designed in the same time;3.Analyzing the transmission channel part of the visible light communication system,modeled and simulated the influence of the indoor lighting layout on the Illumination distribution by MATLAB.To improve the sensitivity of the optical receiver,ZEMAX simulation is used so that the optical receiver can receive signals and complete the processing at a longer communication distance combined with theoptical antenna technology;4.More input / output device were designed according to the full duplex visible light communication system.Considering the innovation and practicality,the final decision is to combine voice interaction,Bluetooth and intelligent control technology to carry out research work.The system information source equipment is voice module or Bluetooth module and the output device is intelligent home terminal equipment.In the end,the intelligent home terminal is controlled through voice or cell phone instruction,and the core wireless transmission part is visible light communication.