| 新型RLC测试仪设计 |
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| 引用本文： | 王选民,陈柘,黄利君.新型RLC测试仪设计[J].西安科技大学学报,2011,31(3). |
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| 作者姓名： | 王选民 陈柘 黄利君 |
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| 作者单位： | 长安大学,信息工程学院,陕西,西安,710064 |
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| 基金项目： | 陕西省自然科学基金项目 |
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| 摘 要： | 自由轴式RLC测试仪因采用准数字鉴相,导致抗干扰能力差,精度低.提出一种基于完全数字鉴相的测量方法.通过乘法及低通滤波算法,对被测信号及正交相位基准进行完全数字鉴相,获得被测信号在坐标轴上的投影分量.依据投影分量计算出被测参数值.推导了被测参数数学模型.设计了测量电路.校正了测量误差,对RLC进行了抽样测试实验.结果表明被测信号投影分量的测量时间<1 ms,元件参数测量时间<20 ms,测量误差≤0.2%.这种方法比传统自由轴式RLC测量方法测量精度高、速度快.
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| 关 键 词： | RLC测量 自由轴法 频率合成 数字滤波 数字鉴相 相位参考基准 |
New RLC measurement instrument design |
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| WANG Xuan-min,CHEN Zhe,HUANG Li-jun.New RLC measurement instrument design[J].JOurnal of XI’an University of Science and Technology,2011,31(3). |
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| Authors: | WANG Xuan-min CHEN Zhe HUANG Li-jun |
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| Institution: | WANG Xuan-min,CHEN Zhe,HUANG Li-jun(College of Information Engineering,Chang'an University,Xi'an 710064,China) |
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| Abstract: | The free-axes RLC tester has poor anti-jamming ability and low precision due to using quasi-digital phase discrimination.A measuring method of fully digital phase discrimination was presented.Through multiplication and low-pass filter algorithm the fully digital phase discrimination for DDS sine source and quadrature phase reference was realized.It acquired projection components of measureing signals in coordinate axis.Then calculated measuring parameter based on the projection component,derived mathematica... |
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| Keywords: | RLC measurement free-axes method frequency synthesis digital filter digital phase discrimination phase reference datum |
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