| 测井电缆衰减特性拟合及其电路建模 |
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| 引用本文： | 闫景富,邹庆言,刘得军. 测井电缆衰减特性拟合及其电路建模[J]. 测井技术, 2017, 0(5): 567-570. DOI: 10.16489/j.issn.1004-1338.2017.05.014 |
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| 作者姓名： | 闫景富 邹庆言 刘得军 |
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| 作者单位： | 中国石油大学(北京),北京,102249 |
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| 基金项目： | 国家重大科研装备研制项目 |
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| 摘 要： | 新开发的测井仪器在进行室内实验时,采用较简单的集总参数电路模拟实际电缆作为信号传输介质,了解数据在实际测井电缆上的传输效果。以某7 000m七芯测井电缆七模式传输为研究对象,针对在各频率离散点处的信号衰减测量值,通过非线性拟合方法,得到该模式下电缆的传递函数解析式,建立了对应的物理可实现电路模型。该模型电路结构较简单,仿真结果表明,电路对原电缆衰减特性的拟合效果良好。电路设计方法可以为不同类型、不同长度的各种数据传输电缆模拟器的设计提供借鉴。
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| 关 键 词： | 测井电缆 信号衰减特性 传递函数 非线性拟合 电路模型 |
Fitting and Circuit Modeling to the Attenuation Characteristics of Logging Cable |
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| Abstract: | In order to get an early understanding about data transmission effect through logging cable,a lumped parameter circuit is often used to simulate the actual cable as signal transmission medium when a newly developed instrument implementing the indoor experiment.a 7 000 m seven-core logging cable with connection mode 7 is taken as the object of study.Based on the signal attenuation measurement at the discrete points of each frequency,the analysis formula to the transfer function of this cable is obtained by the nonlinear fitting method,and a physically achievable circuit model is thus established.Not only with simple circuit structure,this model also shows good fitting effect to the original cable attenuation characteristics through simulation results.The simulated circuit design method can provide reference for the design of various data transmission cable simulators with different types or lengths. |
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| Keywords: | logging cable signal attenuation characteristic transfer function nonlinear fitting circuit model |
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