光子计数三维成像激光雷达反转误差的校正

何伟基1; 司马博羽1; 苗壮2; 陈云飞1; 陈钱1; 顾国华1

doi:10.3788/OPE.20132110.2488

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光子计数三维成像激光雷达反转误差的校正

现代应用光学 | 更新时间：2020-08-12

- 光子计数三维成像激光雷达反转误差的校正
- Correction of reversal errors in photon counting 3D imaging lidar
- 光学精密工程 2013年21卷第10期页码：2488-2494
- 作者机构：
  
  1. 南京理工大学江苏省微光成像与智能感知重点实验室,江苏南京,210094
  2. 微光夜视技术重点实验室,陕西西安,710005
- 作者简介：
- 基金信息：
  
  波长轮换与相移扫描相结合的表面形貌干涉测量方法();国家博士后基金面上项目()
- DOI：10.3788/OPE.20132110.2488
  中图分类号： TN958.98
- 收稿日期：2013-04-01，
  
  修回日期：2013-05-31，
  
  网络出版日期：2012-10-19，
  
  纸质出版日期：2013-10-15
- 稿件说明：
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何伟基司马博羽苗壮陈云飞陈钱顾国华. 光子计数三维成像激光雷达反转误差的校正[J]. 光学精密工程, 2013,21(10): 2488-2494

HE Wei-ji SIMA Bo-yu MIAO Zhuang CHEN Yun-fei CHEN Qian GU Guo-hua. Correction of reversal errors in photon counting 3D imaging lidar[J]. Editorial Office of Optics and Precision Engineering, 2013,21(10): 2488-2494
何伟基司马博羽苗壮陈云飞陈钱顾国华. 光子计数三维成像激光雷达反转误差的校正[J]. 光学精密工程, 2013,21(10): 2488-2494 DOI： 10.3788/OPE.20132110.2488.

HE Wei-ji SIMA Bo-yu MIAO Zhuang CHEN Yun-fei CHEN Qian GU Guo-hua. Correction of reversal errors in photon counting 3D imaging lidar[J]. Editorial Office of Optics and Precision Engineering, 2013,21(10): 2488-2494 DOI： 10.3788/OPE.20132110.2488.

摘要

实施光子飞行时间测量法时，光子飞行时间测量值受激光回波信号能量的影响会出现测量反转误差，从而影响系统三维成像的精度。本文描述了一种光子计数三维成像激光雷达系统反转误差的校正方法及其实验。提出的反转误差校正方法包含先验模型标定和反转误差校正两个步骤。首先，通过标定法得到系统反转误差相对于激光脉冲响应率的函数关系，建立系统的反转误差预测函数。然后，由系统反转误差函数预测出原始三维图像的反转误差图像并实现原始三维图像的反转误差校正。实验搭建了光子计数三维成像激光雷达系统，采用盖格-雪崩光电二极管（Gm-APD)作为光子探测器，由高速扫描振镜二维扫描获取三维图像。通过时间相关记录仪获取光子到达时间分布，分别得到原始三维图像和激光脉冲响应率。在反转误差校正的测试实验中，系统的测量均方差由校正前的33.2 mm提高至8.1 mm。实验结果表明，该反转误差校正方法可以有效降低光子计数三维成像激光雷达的反转误差。

Abstract

When photon time-of-flight measurement is used

the measurement accuracy will decrease due to the reversal error of time-of-flight measurement. In this paper

a method to correct the reversal error is described in detail. The correction method proposed here included two steps: prior modeling calibration and reversal error correction. Firstly

the function relationship between laser pulse response rate and reversal error was obtained by the calibration method and the reversal error prediction function was established. Then

the reversal error of an original 3D image was calculated by the reversal error prediction function and the 3D image was corrected. Finally

a photon counting 3D imaging lidar system was constructed

in which the Geiger mode Avalanche Photodiode(Gm-APD) was used as a photon detector and the high-speed galvanometer as a scanner. A Time Correlation Single Photon Counting (TCSPC) module was used to mark the arrival time of each photon event. The original 3D image and laser pulse response rate were acquired by the arrival time distribution of photon events. In performance evaluation test

the mean square error of ranging results is improved from 33.2 mm to 8.1 mm after correction. The reversal error correction method proposed in this paper effectively reduces the reversal error caused by the energy fluctuation of laser echo pulse in the photon counting 3D imaging lidar.

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Keywords

references

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