高分辨率激光回波模拟器的误差分析及标定
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摘要
激光回波模拟器是为脉冲激光测距仪进行性能检测提供高精度模拟距离的一种装置,其精度直接影响激光测距仪的测距精度。针对基于FPGA电子延时的高分辨率激光回波模拟器,根据回波模拟器的组成及原理,对系统中存在的误差进行理论分析。提出了用高频示波器标定其精度的方法,利用差分原理对激光回波模拟器的模拟距离进行标定。结果表明,标定结果与理论分析相符,利用该标定方法可知此激光回波模拟器的延时误差小于2ns,即模拟距离误差小于0.3m。
The laser echo simulator is a kind of device which provides high precision analog distance for performance detection of pulsed laser range finder. The precision directly affects the accuracy of laser range finder.Aiming at the high resolution laser echo simulator based on FPGA electronic delay,the error of the system is analyzed theoretically according to the composition and principle of the echo simulator. The method of calibrating the accuracy of high frequency oscilloscope is proposed,and the simulation distance of laser echo simulator is calibrated by difference principle.The results show that the calibration results are in agreement with the theoretical analysis,Using this calibration method,the delay error of the laser echo simulator is less than 2ns,the simulation distance error is less than 0.3m.
The laser echo simulator is a kind of device which provides high precision analog distance for performance detection of pulsed laser range finder. The precision directly affects the accuracy of laser range finder.Aiming at the high resolution laser echo simulator based on FPGA electronic delay,the error of the system is analyzed theoretically according to the composition and principle of the echo simulator. The method of calibrating the accuracy of high frequency oscilloscope is proposed,and the simulation distance of laser echo simulator is calibrated by difference principle.The results show that the calibration results are in agreement with the theoretical analysis,Using this calibration method,the delay error of the laser echo simulator is less than 2ns,the simulation distance error is less than 0.3m.
引文
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[3]张尧,赵洋,刘博宇,等.一种基于双目测距系统的亚像素精度自适应图像匹配算法[J].长春理工大学学报:自然科学版,2016,39(02):14-18.
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[6]李真珠,亓洪兴,黄庚华,等.脉冲式激光测距体制设备动态距离模拟器的研究设计[J].科学技术与工程,2012,12(14):3470-3474.
[7]董洪舟,杨若夫,敖明武,等.大量程激光测距仪精度检测系统[J].光电工程,2013,40(04):24-30.
[8]王春艳,秦宏宇,王志坚.火炮动态跟踪精度测量系统-全数字零飞仪[J].长春理工大学学报,2004,27(04):44-48.
[9]权贵秦,郝睿鑫,于洵.一种室内标定激光测距准确度方法的研究[J].国外电子测量技术,2013,32(09):42-45.
[10]王小丽.基于FPGA的激光回波模拟器研究[D].长春:长春理工大学,2016.
[2]邓岩,赵振明,李佳宇.提高相位式激光测距分辨率的一种设计方法[J].长春理工大学学报:自然科学版,2008,39(02):36-39.
[3]张尧,赵洋,刘博宇,等.一种基于双目测距系统的亚像素精度自适应图像匹配算法[J].长春理工大学学报:自然科学版,2016,39(02):14-18.
[4]林盈侃,郭颖,黄庚华,等.激光测距仪距离模拟源技术研究与精度分析[J].红外与激光工程,2009,38(06):1089-1093.
[5]David W Allan.Time and Frequency(time domain)characterization,estimation,and prediction of precision clocks and the Control of Oscillators[J].IEEE Trans on Ultrasonics,Ferroelectrics,and Frequency(S0885-3010),2006,34(6):647-654.
[6]李真珠,亓洪兴,黄庚华,等.脉冲式激光测距体制设备动态距离模拟器的研究设计[J].科学技术与工程,2012,12(14):3470-3474.
[7]董洪舟,杨若夫,敖明武,等.大量程激光测距仪精度检测系统[J].光电工程,2013,40(04):24-30.
[8]王春艳,秦宏宇,王志坚.火炮动态跟踪精度测量系统-全数字零飞仪[J].长春理工大学学报,2004,27(04):44-48.
[9]权贵秦,郝睿鑫,于洵.一种室内标定激光测距准确度方法的研究[J].国外电子测量技术,2013,32(09):42-45.
[10]王小丽.基于FPGA的激光回波模拟器研究[D].长春:长春理工大学,2016.