面向高速移动场景的高速公路视频采集和自动化传输系统设计  

Design of expressway video capture and automated transmission system for high speed mobile scenarios

作　　者：周方正 ZHOU Fangzheng(Guangzhou Road Research Institute Co.,Ltd.,Guangzhou 511431,China)

机构地区：[1]广州市道路研究院有限公司,广东广州511431

出　　处：《电子设计工程》2024年第9期191-195,共5页Electronic Design Engineering

摘　　要：针对高速移动带来的多普勒频移以及子载波干扰,设计了面向高速移动场景下的高速公路视频采集和自动化传输系统。通过数据采集层获取高速公路开关量信号以及视频信息,由数据处理层对其作降噪及增强,采用数据传输层的无线数字传输网络调用基于BEM-wiener的信道估计算法确定高速公路视频传输信道,完成视频信息的上传后,通过应用层分析,实现高速公路路况及突发异常事件的监测。通过试验,得出该系统可采集高速公路视频图像,视频图像清晰、视野宽阔、路况信息丰富;高速移动场景下高速公路视频数据包接收成功率达到0.9左右,BER指标值最小,数据传输效率高,传输时间最多不超过2.5 s,且丢包率小,最大丢包率为1.25%,具有较强的应用性。An expressway video capture and automated transmission system for high-speed mobile scenarios was designed to address the Doppler frequency shift and subcarrier interference caused by high-speed movement.The highway switch signal and video information are obtained through the data acquisition layer,which is denoised and enhanced by the data processing layer.Then,the wireless digital transmission network of the data transmission layer is used to call the channel estimation algorithm based on BEM-wiener to determine the highway video transmission channel.After uploading the video information,the monitoring of highway road conditions and sudden abnormal events is achieved through application layer analysis.Through experiments,it was found that the system can collect video images of highways,with clear video images,wide field of view,and rich road condition information.The success rate of receiving video packets on highways in high-speed mobile scenarios reaches around 0.9,with the smallest BER indicator value.The data transmission efficiency is high,the transmission time does not exceed 2.5 seconds at most,and the packet loss rate is small,with a maximum packet loss rate of 1.25%,which has strong applicability.

关 键 词：高速移动场景 高速公路 视频采集 高清摄像设备 无线数字传输网络 信道估计 

分 类 号：TN919.6[电子电信—通信与信息系统]