日盲紫外光通信系统发送及调制技术的研究

先从总体上介绍了利用的紫外光具有日盲特点而用于通信的必要性以及日盲紫外光通信系统的构成原理,然后介绍了一种利用以电子镇流芯片L6574为核心的电子镇流器完成对信息的调制加载技术,改善了传统的采用电感镇流器而带来的诸多不利,并采用基于光电耦合芯片4N25的光电隔离技术实现电平的转换及信号的隔离,实现了在户外距离大约50 m范围内完成了波特率为1200 b/s的数据信息传输,为日盲紫外光语音通信系统的研究打下了良好的基础.

Research of Transmission and Modulation Technology in Solar Blind UV Communication System

The principle and superiority of ultraviolet communication system based on sun-blind characteristic of ultraviolet are introduced on the whole at first.Then the frequency-loading technology of information modulation by using the electronic ballasted chip L6574 as the core component is introduced in the paper.The electronic ballast is more powerful than the traditional inductive ballast way.The transformation of the voltage and the isolation of the signal are accomplished by adopting the photoelectric isolated technology based on the optical coupler chip 4N25.The data information transmission experiment is carried out successfully at the rate of 1 200 b/s over 50 meters outdoors.It also paves a substantial way for the research of the solar blind UV speech communication system.