焊接现场视频信号的远距离传输技术  

LONG DISTANCE TRANSMISSION OF VIDEO SIGNAL IN WELDING FIELDS

作　　者：张红兵[1] 黄石生[1] 

机构地区：[1]华南理工大学机械工程学院,广州市510640

出　　处：《焊接》2005年第7期13-16,共4页Welding & Joining

基　　金：国家自然科学基金资助项目(50375054)

摘　　要：在焊接测控系统中使用双绞线传输视频信号,抗干扰能力强,传输距离远。基本原理为在发送端将单端的视频信号转换成差分信号并通过双绞线传输,在接收端则将差分信号转换成单端视频信号。介绍了平衡发送驱动器和差分信号接收器的设计技术。设计的关键在于在发送端要对高频信号预提升,在接收端要进行信号补偿。Video signal in welding fields can be increased the anti-interference ability and transmitted to a long distance over twisted-pair. The basic principle of the transmission is that single ended video signal is transformed into differential signal in driver and the differential signal is transmitted over twisted-pair and transformed back into single ended video signal in receiver. The design of balance transmission driver and differential receiver were also introduced, which shows high frequency signals must be boosted in driver and compensated in receiver.

关 键 词：视频信号 传输技术 焊接 双绞线传输 现场 信号转换 抗干扰能力 信号接收器 测控系统 传输距离 差分信号 基本原理 设计技术 高频信号 信号补偿 发送端 接收端 驱动器 预提升 单端 

分 类 号：TN941.1[电子电信—信号与信息处理] TN929.11[电子电信—信息与通信工程]