| 高频相位式激光测距频率源分析与改进 |
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| 引用本文： | 王选钢,缑宁祎,张珂殊.高频相位式激光测距频率源分析与改进[J].仪器仪表学报,2011,32(12). |
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| 作者姓名： | 王选钢 缑宁祎 张珂殊 |
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| 作者单位： | 1. 中国科学院光电研究院 北京100094;中国科学院研究生院 北京100049
2. 中国科学院光电研究院 北京100094 |
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| 摘 要： | 为优化相位式激光测距的频率源设计,提高测距准确度,通过建立频率源的相位噪声和频差在电路中的传递模型,分析二者对测量误差的影响程度,得出频差是影响测距误差的主要因素,提出通过混频器改进锁相环频率源的方法.该方法采用混频器替代传统锁相环反馈同路的分频器,缩短锁相环的锁定时间,从而提高相位式激光测量的准确度.实验结果表明,在测量频率达每秒百万次时,改进后频率源引起的误差降低了39％,该方法能有效提高相位式激光测量性能.
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| 关 键 词： | 相移 频率源 相位噪声 频差 混频器 锁相环 |
Analysis and improvement of frequency source of fast phase-shift laser range finder |
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| Wang Xuangang,Gou Ningyi,Zhang Keshu.Analysis and improvement of frequency source of fast phase-shift laser range finder[J].Chinese Journal of Scientific Instrument,2011,32(12). |
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| Authors: | Wang Xuangang Gou Ningyi Zhang Keshu |
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| Affiliation: | Wang Xuangang1,2,Gou Ningyi1,Zhang Keshu1(1 Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing 100094,China,2 Graduate University,Beijing 100049,China) |
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| Abstract: | In order to optimize the design of frequency source in phase-shift laser range finder and improve the measurement accuracy,the measurement errors were analyzed based on the propagation model of frequency deviation and phase noise in circuits.Frequency deviation is the main factor.An improvement method for PLL frequency source is proposed using a mixer.The frequency divider in the feed back circuit of conventional PLL is substituted by a mixer.The lock time of the PLL is shortened.So the accuracy of phase-sh... |
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| Keywords: | phase shift frequency source phase noise frequency deviation mixer PLL |
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