| 基于伪非均匀采样的高精度时间间隔测量方法 |
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| 引用本文： | 黄军芬,黄民双,孙亚玲,黄继强.基于伪非均匀采样的高精度时间间隔测量方法[J].光电子．激光,2012(10):1945-1948. |
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| 作者姓名： | 黄军芬 黄民双 孙亚玲 黄继强 |
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| 作者单位： | 北京石油化工学院光机电装备技术北京市重点实验室;北京石油化工学院光机电装备技术北京市重点实验室;中国石油大港石化公司聚丙烯车间;北京石油化工学院光机电装备技术北京市重点实验室 |
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| 基金项目： | 北京市教育委员会科技发展计划(KM201110017005)资助项目 |
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| 摘 要： | 为提高脉冲激光测距的精度,采用一种新的高精度时间间隔测量方法。在脉冲计数法的基础上,利用温补晶振生成与计时量化时钟同步同频率的参考正弦波信号,将提高时间间隔测量精度问题转化为初始相位估计;通过伪非均匀采样方法对参考正弦波信号采样,并针对研究中所采用的伪非均匀采样方法推导出相应的理论公式,然后利用最小二乘法对采样数据进行曲线拟合,将伪非均匀采样信号还原成被采样的参考信号,实现相位估计,从而实现高精度时间间隔测量。将本文方法应用于脉冲激光测距仪中,实验表明,测距仪的测距精度优于±5mm。
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| 关 键 词： | 脉冲激光测距 时间间隔测量 伪非均匀采样 |
High precision time-interval measurement method based on pseudo-nanuniform sampling |
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| HUANG Jun-fen,HUANG Min-shuang,SUN Ya-ling and HUANG Ji-qiang.High precision time-interval measurement method based on pseudo-nanuniform sampling[J].Journal of Optoelectronics·laser,2012(10):1945-1948. |
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| Authors: | HUANG Jun-fen HUANG Min-shuang SUN Ya-ling and HUANG Ji-qiang |
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| Affiliation: | Beijing Area Major Laboratory of Opto-mechatronic Equipment Technology,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Area Major Laboratory of Opto-mechatronic Equipment Technology,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Polypropylene Workshop,Petrochina Dagang Petrochemical Company of China,Tianjin 300280,China;Beijing Area Major Laboratory of Opto-mechatronic Equipment Technology,Beijing Institute of Petrochemical Technology,Beijing 102617,China |
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| Abstract: | A novel high precision time-interval measurement method is proposed to improve the precision of pulsed laser ranging.Based on the pulse counting method,a temperature compensated crystal oscillator is used to generate synchronous sine wave reference signals of quantized timing pulses,and the improvement of precision of time-interval measurement is converted into phase estimation.The reference signals are sampled through the pseudo-nonuniform sampling method,and theoretical formulas are educed according to the pseudo-nonuniform sampling method in the paper.Afterwards,the least square method is used to fit the sampling data and pseudo-nonuniform sampling signals are reverted into sampled reference signals to fulfill phase estimation.Then high precision time-interval measurement can be realized.The method is used in a pulsed laser ranger for testing,and ranging precision is better than ±5 mm. |
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| Keywords: | pulsed laser ranging time-interval measurement pseudo-nonuniform sampling |
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