可见光通信中曼彻斯特编码抗频闪研究  

Research on Improving Anti-stroboscopic Coding in Visible Light Communication

作　　者：刘正翔[1] Liu Zhengxiang(Fuzhou Polytechnic,Fuzhou Fujiang 350108,China)

机构地区：[1]福州职业技术学院智能工程系,福州350108

出　　处：《襄阳职业技术学院学报》2024年第1期93-96,共4页Journal of Xiangyang Polytechnic

基　　金：2023年福州职业技术学院科研项目“物联网中数据融合技术研究”(FZYKJJJYB202307)。

摘　　要：为解决可见光通信中的LED频闪使人感到不适的问题,文章提出一种基于曼彻斯特编码的抗频闪改进方法,并搭建平台验证其可行性。通过高速摄像机对编码前后频闪现象进行录制,并随机截取550帧数据,使用Matlab分析每个帧图像的灰度对比。实验表明,编码前的帧图像灰度均值在55至70呈现毛刺状剧烈波动,而编码后该值稳定在60~65,视频帧灰度值均化程度大大优于编码前的灰度值曲线。改进后的编码在传输速率增加至2 Kbps后,即便在摄像机下观察,也不会出现LED频闪现象,由此验证本方案的有效性。In order to solve the discomfort caused by LED stroboscopic in visible light communication,an improved anti-stroboscopic method based on Manchester coding is proposed,and a platform is built to verify its feasibility.Record the flicker phenomenon before and after encoding using a high-speed camera,and randomly capture 550 frames of data.Use Matlab to analyze the grayscale comparison of each frame image.The experiment shows that the average grayscale of the frame image before encoding exhibits sharp fluctuations in a burr like manner between 55 and 70,while the value stabilizes between 60 and 65 after encoding.The degree of homogenization of the grayscale value of the video frame is much better than the grayscale value curve before encoding.After the improved encoding increases the transmission rate to 2Kbps,even when observed under the camera,there will be no LED flicker phenomenon,thus verifying the effectiveness of this scheme.

关 键 词：LED可见光通信 低闪频 曼彻斯特编码 

分 类 号：TE927[石油与天然气工程—石油机械设备]