Optimization and real-time measurement of time system in three-line stereo mapping camera

WU Xing-xing; LIU Jin-guo

doi:10.3788/OPE.20122005.1022

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Optimization and real-time measurement of time system in three-line stereo mapping camera

Article | 更新时间：2020-08-12

- Optimization and real-time measurement of time system in three-line stereo mapping camera
- Optics and Precision Engineering Vol. 20, Issue 5, Pages: 1022-1030(2012)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122005.1022
  CLC： V447.3
- Received：13 December 2011，
  
  Revised：22 December 2011，
  
  Published Online：10 May 2012，
  
  Published：10 May 2012
- 稿件说明：
移动端阅览
武星星, 刘金国. 三线阵立体测绘相机时间系统优化与实时检测[J]. 光学精密工程, 2012,20(5): 1022-1030

WU Xing-xing, LIU Jin-guo. Optimization and real-time measurement of time system in three-line stereo mapping camera[J]. Editorial Office of Optics and Precision Engineering, 2012,20(5): 1022-1030
武星星, 刘金国. 三线阵立体测绘相机时间系统优化与实时检测[J]. 光学精密工程, 2012,20(5): 1022-1030 DOI： 10.3788/OPE.20122005.1022.

WU Xing-xing, LIU Jin-guo. Optimization and real-time measurement of time system in three-line stereo mapping camera[J]. Editorial Office of Optics and Precision Engineering, 2012,20(5): 1022-1030 DOI： 10.3788/OPE.20122005.1022.

摘要

为了提高三线阵立体测绘相机的时间同步精度

对相机时间系统工作原理进行了分析

建立了三线阵立体测绘相机的相机时间同步误差模型

并根据该模型采取缩短行同步计数器查询周期等多项措施对相机时间系统进行优化。针对相机时间同步误差在摄影过程中会随相机控制器工作时序变化这一现象

提出了一种实时检测相机时间同步精度的方法

用于实时检测并全程记录摄影过程中相机时间同步误差的动态变化

解决了常规仪器由于存储深度不足而无法长期检测这一难题。利用该方法检测了优化后的三线阵立体测绘相机时间系统的时间同步精度

结果表明

摄影过程中三线阵立体测绘相机的时间同步误差74.8 s

相机时间同步误差绝对值11.2 s的概率不低于0.95

满足技术指标要求。

Abstract

To improve the time synchronization precision of a three-line stereo mapping camera

a time synchronization error model for the three-line stereo mapping camera was set up based on the analysis of working principle of the time system in the camera. Then

several methods such as reduction of row synchronization counter polling period were adopted to optimize the time system. As the time synchronization errors may change with the working time sequence of the camera controller

a real-time time synchronization precision measuring method for the three-line stereo mapping camera was put forward to measure and record the dynamic changes of time synchronization errors in real-time during photographing process globally. With the method

the difficult problem that custom instruments could not be used for long time measurement of time synchronization errors because of their finite memory depths was solved. This method was used to measure time synchronization precision of the time system for the optimized three-line stereo mapping camera. Experimental results indicate that time synchronization errors of the camera are no more than 74.8 s during photographing process and the probability of absolute value of time synchronization errors no more than 11.2 s is more than 0.95

which meets the demand of qualification.

关键词

Keywords

references

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