接触线参数双目视觉测量系统的有效视场与分辨率分析

巩浩,张凤生,纪庆龙

(青岛大学 机电工程学院,山东 青岛 266071)
摘要:根据双目测量系统的特点和接触线参数检测的技术要求,分析了双目视觉法测量接触线的有效视场和分辨率与系统结构参数和摄像机光学参数的理论关系。应用MATLAB软件对不同结构参数和光学参数条件下的有效视场和分辨率进行仿真计算。结果表明图像传感器CCD光敏面尺寸和像素尺寸分别是影响有效视场和分辨率的主要因素;对于确定的CCD,焦距增大,有效视场减小,分辨率提高;而且,对接触线高度的测量分辨率远低于对拉出值的测量分辨率。
关键词:接触线;双目视觉;线阵CCD;有效视场;分辨率
中图分类号:TH741             文献标识码:A         文章编号:1006-0316 (2012) 05-0049-05
Analysis of the effective field of view & resolution on the binocular measuring system of contact wire's parameters
GONG Hao,ZHANG Feng-sheng,JI Qing-long
(College of Mechanical & Electrical Engineering,Qingdao University,Qingdao 266071,China)
Abstract:According to the characteristics of binocular measuring system and the technical requirements of contact wire, this paper presents an analysis on theoretical relationship between the effective field of view & resolution of a binocular measuring system and the system’s structure parameters and camera optical parameters. The simulating calculation for the effective field of view and resolution on different structure parameters and optical parameters are done by use of MATLAB simulating software. The results show that the image area size and pixel size of a CCD are principal influence factors on effective field of view and resolution; once CCD has been chosen, increase in focus will make the effective field of view decrease and resolution increase. Moreover, the measuring resolution for contact wire’s height is below the one for contact wire’s stagger. These conclusions have instructional significance for the optimal design of a practical measurement system.
Key words:contact wire;binocular vision;linear CCD;effective field of view;resolution

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收稿日期:2012-01-07
作者简介:巩浩(1984-),男,山东滨州人,硕士研究生,主要研究方向为测试与智能仪器。

 

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