摘要
为提高可见光下行链路的通信质量,文中搭建了基于OpenMV的可见光通信自动对准系统。该系统基于图像处理和颜色识别等技术,实现室内白光LED(Light Emitting Diode)的自动识别。系统通过灰度质心法确定白光LED的质心坐标,并使用PID(Proportional Integral Differential)算法驱动舵机实现室内白光LED的跟踪。实验结果表明,在接收距离2 m处,可见光通信自动对准系统能在多种运动轨迹下实现白光LED的自动对准,最大对准角度误差小于0.534°。此外,无论是白光LED被遮挡还是存在干扰光源,系统仍能保持良好的跟踪效果,表明系统具有良好的鲁棒性。
In order to improve the communication quality of visible light downlink,an automatic alignment system for visible light communication based on OpenMV is designed in this study.The system realizes automatic recognition of indoor white LED is based on image processing and color recognition.The system uses gray-scale centroid method to determine the centroid coordinates of white LED,and the PID algorithm is used to drive steering gears to achieve the tracking of the indoor white light LED.The experimental results show that the automatic alignment system of visible light communication can realize the automatic alignment of white LED under various motion trajectories at the receiving distance of 2 m,and the maximum alignment angle error is less than 0.534°.In addition,whether the white LED is blocked or there is an interfering light source,system can still maintain the good tracking effect,indicating that system has good robustness.
作者
苑振博
白勃
张晓薇
罗柳君
尚韬
YUAN Zhenbo;BAI Bo;ZHANG Xiaowei;LUO Liujun;SHANG Tao(School of Communication Engineering,Xidian University,Xi′an 710071,China)
出处
《电子科技》
2023年第6期8-15,共8页
Electronic Science and Technology
基金
国家自然科学基金(61801356)
陕西省重点研发计划(2020ZDLGY05-02)。
