一种基于可见光的简易多路通信系统设计与实现  

Design and Implementation of a Simple Multiplex Communication System Based on Visible Light

作　　者：邹益民 袁彪 徐辉 周韬 ZOU Yi-min;YUAN Biao;XU Hui;ZHOU Tao(School of Networks and Telecommunications Engineering,Jinling Institute of Technology,Nanjing 211169,China)

机构地区：[1]金陵科技学院网络与通信工程学院,江苏南京211169

出　　处：《仪表技术》2019年第3期36-38,共3页Instrumentation Technology

摘　　要：可见光通信是利用光脉冲携带需传递的信息,从而实现数字通信。可见光通信具有许多优点:低辐射、低能耗、低碳环保、高安全、使用方便。研究使用多个白光LED实现多路可见光通信的应用案例。MSP430单片机通过PWM模式对LED的电流进行控制,从而将数字信号调制成发光强度的变化;此后,通过PIN光电二极管及TIA跨阻放大器将LED的发光强度变化转换为电压信号,经MSP430单片机内置的ADC通道对此电压信号进行采样,并识别出LED携带的数字信息,最终达到可见光通信的目的。系统原理简单,实现方便,可为类似装置提供借鉴。The digital communication is carried out by the visible light communication, which uses optical pulse to carry the information to be transmitted. It has many advantages, such as low radiation, low energy consumption, low carbon and environmental protection, high security, and ease of use. This paper studied the application cases of multichannel visible light communication using multiple white LED. The MSP430 SCM controlled the current of LED through PWM, thus it modulated the digital signal into the brightness change of light. Thereafter, the light intensity change was converted into voltage signal by PIN photodiode and TIA transimpedance amplifier. Then the voltage signal was sampled by ADC channel built in MSP430 SCM, and the digital information carried by LED was identified. Thus, the purpose of visible light communication was achieved. The principle of this system was simple and easy to implement. It could be used for reference in the design of similar devices.

关 键 词：LED光源 可见光通信 多路通信 单片机 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]