| 时域反射电缆测长测量精度影响因素分析 |
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| 引用本文： | 宋建辉,于洋,陈亮.时域反射电缆测长测量精度影响因素分析[J].沈阳理工大学学报,2012,31(1):23-27. |
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| 作者姓名： | 宋建辉 于洋 陈亮 |
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| 作者单位： | 沈阳理工大学信息科学与工程学院,辽宁沈阳,110159 |
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| 摘 要： | 从时域反射电缆测长的测量原理出发,研究了时域反射电缆测长的系统误差,研究了测量次数、计数脉冲频率、行波波速对测量精度的影响,提出了减小时域反射电缆测长误差的方法.仿真结果和实验证明,在波速误差较小时,采用传统直接计数法对电缆长度进行多次测量,可以达到较高的电缆测长精度.
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| 关 键 词： | 时域反射 电缆 测量精度 影响因素 |
Measuring Accuracy Affecting Factors of Time Domain Reflectometry Cable Length Measurement |
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| SONG Jianhui
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YU Yang
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CHEN Liang.Measuring Accuracy Affecting Factors of Time Domain Reflectometry Cable Length Measurement[J].Transactions of Shenyang Ligong University,2012,31(1):23-27. |
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| Authors: | SONG Jianhui YU Yang CHEN Liang |
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| Affiliation: | (Shenyang Ligong University,Shenyang 110159,China) |
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| Abstract: | The theory of the time domain reflectometry(TDR) cable length measurement is investigated.Based on the principle of TDR cable length measurement,the principle error of the TDR cable length measurement is analyzed.The influence of measured cable length,measuring numbers,counting pulse frequency and traveling wave velocity error on measuring accuracy is analyzed.Methods for reducing cable length measurement error are proposed.The simulation and experimental results show that when the velocity errors are small,the length measurement relative error can be significantly improved by increasing the measuring numbers and the counting frequency. |
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| Keywords: | TDR cable measuring accuracy affecting factors |
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