| 电缆遥测系统中双相位编码解码电路设计方案 |
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| 引用本文： | 鞠晓东,汪涛,李会银. 电缆遥测系统中双相位编码解码电路设计方案[J]. 中国石油大学学报(自然科学版), 1992, 0(5) |
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| 作者姓名： | 鞠晓东 汪涛 李会银 |
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| 作者单位： | 石油大学勘探系(鞠晓东，汪涛)，石油大学勘探系(李会银) |
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| 摘 要： | 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.
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| 关 键 词： | 信号 通讯系统 编码 电路 解码 |
A BI-PHASE MODEM CIRCUIT SCHEME FOR A CABLE TELEMETRY SYSTEM |
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| Ju Xiaodong Jiang Tao Li Huiyen. A BI-PHASE MODEM CIRCUIT SCHEME FOR A CABLE TELEMETRY SYSTEM[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 1992, 0(5) |
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| Authors: | Ju Xiaodong Jiang Tao Li Huiyen |
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| Affiliation: | Dept. of Petroleum Exploration |
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| Abstract: | A digital modem scheme designed for data transmission in logging cable is described in this paper. Bi-phased modulation and full-duplex serial synchronous data transmission increases the transmission rate of the system to 100 kb/s, when the cable is 3.5km long. Signal processing circuit and demodulation circuit with an automatic phase-locked junction can recover the data signal from the cable. Massive information, real time operation and universality are the main characteristics of this system, which uses large scale integrated circuit chips and interchanges data with memory by direct memory access mode. Full-duplex performance is realized by frequency division multiplex. Up-link and down-link data formats are defined by programming, so it can be easily changed when necessory. The data transmission system has a high reliability and good error detection ability. |
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| Keywords: | Signal Communication Modulator Demodulator Circuit |
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