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介绍一种适用于测井电缆传输数据的信号编码解码设计方案.采用双相位信号编码和全双工串行同步传输方式,在使用3.5 km电缆时传输速率可达100 kb/s.解码电路对信号进行全面恢复处理,具有自动相位锁定功能.本方案具有信息量大、实时性和通用性等特点,采用大规模集成电路接收信号,以DMA方式读取数据.全双工性能由频分方式获得,上下行数据格式由软件编程确定,极为灵活.由于设计合理及采用高性能接收集成芯片,系统传输非常可靠,并具有良好检错能力.现场应用结果表明,其性能远优于斯仑贝谢公司的CTS和CCS遥测系统.
This paper introduces a kind of signal coding and decoding scheme which is suitable for transmitting data of logging cable.It adopts dual-phase signal coding and full-duplex serial synchronous transmission mode, the transmission rate can reach 100 kb / s when using 3.5 km cable. Signal full recovery processing, with automatic phase lock function.This program has a large amount of information, real-time and versatility and other characteristics, the use of large-scale integrated circuits to receive signals to read data by DMA mode.Full-duplex performance by the frequency division method Obtained, the data format of the up and down line determined by the software programming, extremely flexible. Due to the reasonable design and high-performance receiver integrated chip, the system transmission is very reliable, and has good error detection. Field application results show that its performance far superior to the Slumb Thanks to the company’s CTS and CCS telemetry system.