| 地震勘探仪器的RS-485高速数据/能量传输 |
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| 引用本文： | 丁天怀,李成,王鹏,陈恳,耿立中.地震勘探仪器的RS-485高速数据/能量传输[J].清华大学学报(自然科学版),2009(5). |
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| 作者姓名： | 丁天怀 李成 王鹏 陈恳 耿立中 |
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| 作者单位： | 清华大学精密仪器与机械学系; |
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| 摘 要： | 为实现地震勘探仪器采集的大容量数据的高速远距离长线传输,比较数据传输方式,提出了RS-485总线的高速串行数据传输方法,应用FPGA技术,研制了数据传输系统。分析RS-485数据传输的影响因素,设计了系统总体结构及传输协议。基于以太网供电原理,采用RS-485总线供电方式,实现48V直流能量与数据沿同一线对的叠加传输。利用串行信号的跳变沿作为高速时钟采样的起始标志,结合8B/10B的链路编码方案,实现位同步时钟恢复与数据帧提取,且检测时钟频率10倍于发送时钟频率。数传实验结果表明,系统可实现串行编码数据流以20Mb/s沿220m双绞线电缆的远距离数据传输,误码率可达10-11。
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| 关 键 词： | 地震数据 RS-485总线 高速 远距离传输 直流能量 |
RS-485 bus-based high-speed data/power transmission method for seismic exploration instruments |
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| DING Tianhuai,LI Cheng,WANG Peng,CHEN Ken,GENG Lizhong.RS-485 bus-based high-speed data/power transmission method for seismic exploration instruments[J].Journal of Tsinghua University(Science and Technology),2009(5). |
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| Authors: | DING Tianhuai LI Cheng WANG Peng CHEN Ken GENG Lizhong |
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| Institution: | Department of Precision Instruments and Mechanology;Tsinghua University;Beijing 100084;China |
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| Abstract: | An RS-485 bus-based high-speed serial data transmission system was developed for high-speed remote long wire transmission of a large amount of data collected by seismic exploration instruments using FPGA technology.The system structure and communication protocols are given.The power in the Ethernet is used to drive the RS-485 bus with transmission of the 48 V DC and data signals via the same twisted-pair electric cable.The rising/falling edges of the serial signals are used as the start symbols for high-spe... |
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| Keywords: | seismic data RS-485 bus high-speed remote transmission direct current power |
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