基于非对称sinc函数拟合的激光测距算法优化
发布时间:2018-01-01 20:39
本文关键词:基于非对称sinc函数拟合的激光测距算法优化 出处:《红外与激光工程》2017年08期 论文类型:期刊论文
【摘要】:小型化的高重频多脉冲激光测距机采用数字化处理确定目标距离,接收电路带宽、数字化采样精度以及滤波算法等因素会影响测距的精度,文中在对测距误差分析的基础上提出改进测距精度的算法。首先,在对激光回波信号积累以提高信噪比的基础上,对回波信号波形进行中心差分处理、斜率阈值和幅度阈值条件处理,剔除伪峰值点,初步确定峰值点位置。然后,根据初定位后的波形特点,选择相应的指数函数进行非对称sinc函数波形拟合修正,估计波峰点相对准确位置,从而输出较为精确的目标距离。最后,将改进算法在matlab中仿真,实验结果验证了文中提出的修正算法对提高激光测距精度的有效性。
[Abstract]:High frequency miniature multi pulse laser rangefinder using digital processing to determine the target distance, receiving circuit bandwidth, sampling precision and digital filtering algorithm will influence the precision of distance measurement, the improved ranging accuracy algorithm is proposed based on analysis of the ranging error. First of all, in the accumulation of the laser echo signal to improve the foundation the signal-to-noise ratio on the center differential processing of the echo signal waveform, amplitude and slope threshold threshold conditions, excluding pseudo peak point, preliminary determine the peak point. Then, according to the waveform characteristics after the initial location, select the index function corresponding to non symmetric sinc waveform fitting correction function, estimation of relative peak the exact location, so as to output a more precise target distance. Finally, the improved algorithm in MATLAB simulation, the experimental results verify the algorithm proposed in this paper to improve the laser measuring The validity of the distance from the precision.
【作者单位】: 郑州航空工业管理学院;郑州大学信息工程学院;
【基金】:国家自然科学基金(61331021) 河南省科技攻关项目(172102410067,152102210139,144300510059) 航空科学基金(2014ZC13004) 河南省高校科技创新团队(17IRTSTHN014)
【分类号】:TN249
【正文快照】: 0引言目前,便携式激光测距机或测距望远镜采用10 k Hz以上的高重复频率发射激光信号[1],可以降低激光器的发射功率,在探测器接收时采用多脉冲的积累提高接收信号的信噪比,提高作用距离。激光测距机的发射波形因采用的激光器不同而有高斯型、负抛物线型、sinc函数型等类型,这些,
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