| 便携式时域反射仪硬件系统设计 |
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| 引用本文： | 沈绍祥,冯炜,纪奕才,方广有.便携式时域反射仪硬件系统设计[J].电子技术应用,2010,36(1). |
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| 作者姓名： | 沈绍祥 冯炜 纪奕才 方广有 |
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| 作者单位： | 1. 中国科学院电子学研究所,北京100190;中国科学院研究生院,北京,100190
2. 中国科学院电子学研究所,北京,100190 |
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| 摘 要： | 介绍了用于土壤参数测量的时域反射仪硬件系统的设计与实现方案,并研制出样机TDR-I。该样机使用DSP做主控板,利用阶跃恢复二极管(SRD)产生140ps上升沿的快沿发射脉冲,采用快慢斜波比较法获得等效采样步进精度为8.7ps的取样脉冲。经过实验数据获取验证,该系统测量效果良好。
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| 关 键 词： | 时域反射仪 等效采样 步进脉冲 采样门 |
Hardware design of a portable time domain reflectometry |
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| SHEN Shao Xiang,FENG Wei,JI Yi Cai,FANG Guang You.Hardware design of a portable time domain reflectometry[J].Application of Electronic Technique,2010,36(1). |
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| Authors: | SHEN Shao Xiang FENG Wei JI Yi Cai FANG Guang You |
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| Abstract: | Hardware design of a portable time domain reflectometry(TDR) is introduced in this paper.This TDR can be applied to test soil parameters.A prototype of TDR-I has been developed,in which a DSP board is used as the main control unit.A 140 ps rising edge transmit pulse is generated by step recovery diode.The precision of step pulse is achieved to be 8.7 ps by equivalent sampling based on the comparison of fast ramp and slow ramp.The experimental results verified the good performance of the system. |
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| Keywords: | time domain reflectometry equivalent sampling step pulse sampling gate |
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