平动小目标光子探测回波特性及测距误差研究

侯阿慧; 胡以华; 方佳节; 赵楠翔; 徐世龙

doi:10.7498/aps.71.20211998

摘要

针对远距离运动目标的光子测距问题, 建立了运动目标的光子探测回波概率分布模型, 给出了适用于任意目标的光子探测蒙特卡洛模型. 通过实验对比, 验证了蒙特卡洛仿真模型的正确性. 进一步分析了一个探测周期内的平动小矩形目标激光回波和光子回波概率分布变化规律, 讨论了光子测距误差与目标平动速度间的关系. 结果表明: 光斑直径为$ {\text{2}}{\text{.5 m}} $、目标尺度为$ {\text{1 m}} $时, 距离漂移在速度为$ 25{\text{ m/s}} $取到极大值$ 6.72{\text{ cm}} $, 是扩展目标距离漂移的$ 1/2 $倍; 随着平动速度的增加, 以出光斑为界, 距离漂移先增大后保持稳定不变. 本文提出的方法可进一步扩展到其他形状、材质、姿态、运动目标的光子探测, 研究结果为运动目标的光子测距的校正和性能的提升提供了理论依据.

关键词:

Abstract

The photon counting Lidar enhances the signal-to-noise ratio of the echo signal and reduces the number of photons required for signal analysis, thereby improving the detection range and measurement accuracy. At present, the photon counting Lidar is mainly used to detect stationary targets, and the mechanism of the influence of long-distance target motion characteristics on the photon echo probability distribution is still unclear. Therefore, it is urgent to study the photon ranging performance of long-distance moving targets.In this paper, the probability distribution model of photon detection echo of moving targets is established, and a Monte Carlo model for photon detection of arbitrary targets is given. Through experimental comparison, the correctness of the Monte Carlo simulation model is verified. Furthermore, the probability distribution characteristics of the laser echo and photon echo of a small rectangular target in translation within a detection period are compared. And the variation law of the probability distribution of photon detection under different translational speeds is analyzed. In addition, the relationship between the photon ranging error and the translational speed of the target is discussed.The results show that the photon echo probability distribution of the translational target is more forward and the width is narrower than the laser pulse echo probability distribution. Compared with the extended target, the detection probability of the translational small target is significantly reduced, and the maximum average echo photon number is $ 1/10 $ times that of the extended target, as a result, the photon detection of the translational target requires higher laser pulse energy. When the length of target is 1m, the range walk error reaches a maximum value at a speed of $25\;{\text{m/s}}$, i.e. $6.72\;{\text{ cm}}$, which is $ 1/2 $ times that of the extended target. With the increase of the translational speed, the range walk error first increases and then turns stable with the light spot acting as the boundary.The method proposed in this paper can be further extended to photon detection and ranging of targets with other shapes, materials and attitudes. The research results provide a theoretical basis for the correction and performance improvement of the photon ranging of moving target. Furthermore, it lays the foundation for the detection of moving targets and accurate acquisition of information by photon counting Lidar.

Keywords:

作者及机构信息

1.
国防科技大学, 脉冲功率激光技术国家重点实验室, 合肥　230037

2.
国防科技大学, 安徽省电子制约技术重点实验室, 合肥　230037

通信作者: 胡以华, skl_hyh@163.com ; 赵楠翔, southfly@163.com ;

基金项目: 国防科技大学科研计划项目(批准号: ZK18-01-02)和国家自然科学基金(批准号: 61871389)资助的课题

Authors and contacts

1.
State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China

2.
Anhui Provincial Key Laboratory of Electronic Restriction, National University of Defense Technology, Hefei 230037, China

Corresponding author: Hu Yi-Hua, skl_hyh@163.com ; Zhao Nan-Xiang, southfly@163.com ;

Funds: Project supported by the Scientific Research Program of National University of Defense Technology, China (Grant No. ZK 18-01-02), and the National Natural Science Foundation of China (Grant No. 61871389).

文章全文 : translate this paragraph

参考文献

[1]	刘博, 于洋, 姜朔 2019 光电工程 46 190167 Google Scholar Liu B, Yu Y, Jiang S 2019 Opto-Electron. Eng. 46 190167 Google Scholar
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[3]	Johnson S, Gatt P, Nichols T 2003 Proc. SPIE Int. Soc. Opt. Eng. 5086 359 Google Scholar
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施引文献

图 1 运动目标光子测距坐标系示意图　(a) xyz坐标系; (b) xoy面

Fig. 1. Coordinate system of photon ranging for moving targets: (a) xyz coordinate system; (b) xoy plane.

下载: 全尺寸图片幻灯片

图 2 光子探测蒙特卡洛模型流程图

Fig. 2. Flow diagram of photon detection Monte Carlo model

下载: 全尺寸图片幻灯片

图 3 蒙特卡洛模型仿真结果对比

Fig. 3. Comparison of Monte Carlo model simulation results

下载: 全尺寸图片幻灯片

图 4 目标面积和回波光子数与目标平动距离的关系

Fig. 4. The relationship between the area of target, the number of echo photons and the target translation distance.

下载: 全尺寸图片幻灯片

图 5 v = 35 m/s时目标的光子探测概率分布结果

Fig. 5. Results of the photon detection probability distribution of the target at v = 35 m/s.

下载: 全尺寸图片幻灯片

图 6 不同平动速度的光子回波概率分布　(a) v = 5—25 m/s; (b) v = 35—65 m/s

Fig. 6. Probability distribution of photon echo with different translational speed: (a) v = 5–25 m/s; (b) v = 35–65 m/s.

下载: 全尺寸图片幻灯片

图 7 平均回波光子数和光子事件数与目标平动速度的关系

Fig. 7. The relationship between the average number of echo photons, the number of photon events and the speed of target.

下载: 全尺寸图片幻灯片

图 8 距离漂移与目标平动速度的关系

Fig. 8. The relationship between the range walk error and target translational speed.

下载: 全尺寸图片幻灯片

[1]	刘博, 于洋, 姜朔 2019 光电工程 46 190167 Google Scholar Liu B, Yu Y, Jiang S 2019 Opto-Electron. Eng. 46 190167 Google Scholar
[2]	Wulder M A, White J C, Nelson R F, Næsset E, Ørka H O, Coops N C, Hilker T, Bater C W, Gobakken T 2012 Remote Sens. Environ. 121 196 Google Scholar
[3]	Johnson S, Gatt P, Nichols T 2003 Proc. SPIE Int. Soc. Opt. Eng. 5086 359 Google Scholar
[4]	侯利冰, 黄庚华, 况耀武, 陈凯, 舒嵘 2013 科学技术与工程 13 5186 Google Scholar Hou L B, Huang G H, Kuang Y W, Chen K, Shu R 2013 Sci. Tech. Eng. 13 5186 Google Scholar
[5]	罗远, 贺岩, 耿立明, 王明建, 雷琳君, 吴姚芳, 胡善江, 侯霞, 陈卫标 2016 中国激光 43 0514001 Google Scholar Luo Y, He Y, Geng L M, Wang M J, Lei L J, Wu Y F, Hu S J, Hou X, Chen W B 2016 Chin. J. Lasers 43 0514001 Google Scholar
[6]	邵禹, 王德江, 张迪, 陈成 2021 激光与光电子学进展 10 250 Google Scholar Shao Y, Wang D J, Zhang D, Chen C 2021 Laser Optoelectron. Prog. 10 250 Google Scholar
[7]	Pawlikowska A M, Halimi A, Lamb R A, Buller G S 2017 Opt. Express 25 11919 Google Scholar
[8]	Degnan J J 2002 J. Geodyn. 34 503 Google Scholar
[9]	Oh M S, Kong H J, Kim T H, Hong K H, Kim B W 2010 Opt. Commun. 283 304 Google Scholar
[10]	Barton-Grimley R A, Thayer J P, Hayman M 2019 Opt. Lett. 44 1249 Google Scholar
[11]	黄科, 李松, 马跃, 田昕, 周辉, 张智宇 2018 物理学报 67 064205 Google Scholar Huang K, Li S, Ma Y, Tian X, Zhou H, Zhang Z Y 2018 Acta Phys. Sin. 67 064205 Google Scholar
[12]	Chen Z D, Li X D, Li X H, Ye G C, Zhou Z G 2019 Opt. Commun. 434 7 Google Scholar
[13]	寇添, 王海晏, 王芳, 陈闽, 徐强 2015 光学学报 35 0414001 Google Scholar Kou T, Wang H Y, Wang F, Chen M, Xu Q 2015 Acta Opt. Sin. 35 0414001 Google Scholar
[14]	寇添, 王海晏, 王芳, 吴学铭, 王领, 徐强 2015 物理学报 64 120601 Google Scholar Kou T, Wang H Y, Wang F, Wu X M, Wang L, Xu Q 2015 Acta Phys. Sin. 64 120601 Google Scholar
[15]	徐孝彬, 张合, 张祥金, 陈杉杉, 张伟 2016 物理学报 65 210601 Google Scholar Xu X B, Zhang H, Zhang X J, Chen S S, Zhang W 2016 Acta Phys. Sin. 65 210601 Google Scholar
[16]	谢庚承, 叶一东, 李建民, 袁学文 2018 中国激光 45 0610001 Google Scholar Xie B C, Ye Y D, Li J M, Yuan X W 2018 Chin. J. Lasers 45 0610001 Google Scholar
[17]	Xu X B, Zhang H, Luo M Z, Tan Z Y, Zhang M, Yang H, Li Z H 2019 Infrared Phys. Technol. 96 330 Google Scholar
[18]	侯阿慧, 胡以华, 赵楠翔, 方佳节, 张鑫源 2021 中国激光 48 0401016 Google Scholar Hou A H, Hu Y H, Zhao N Y, Fang J J, Zhang X Y 2021 Chin. J. Lasers 48 0401016 Google Scholar
[19]	刘芳华, 贺岩, 罗远, 贾文武, 曹丽君, 李琳琳, 李凯鹏, 陈勇强, 郭守川, 陈卫标 2021 中国激光 48 1310001 Google Scholar Liu F H, He Y, Luo Y, Jia W W, Cao L J, Li L L, Li K P, Chen Y Q, Guo S C, Chen W B 2021 Chin. J. Lasers 48 1310001 Google Scholar
[20]	Becker W 2005 Advanced Time-correlated Single Photon Counting Techniques (Berlin: Springer Science & Business Media) pp204–206
[21]	Fouche D G. 2003 Appl. Opt. 42 5388 Google Scholar

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平动小目标光子探测回波特性及测距误差研究