基于传递像机的移动摄像测量方法

发布时间：2019-01-19 16:27

【摘要】：针对大型结构表面积较大而像机视野有限的问题,提出了一种基于传递像机的移动摄像测量方法,该方法可对大型结构进行全局扫描测量。利用固定连接于移动平台的传递像机对基准标识点进行图像采集,采用像机参数标定方法对传递像机的外参数进行计算,得到相邻时刻移动平台坐标的相对转换关系。测量像机在移动平台的驱动下围绕结构表面采集特征点,利用运动平台坐标的转换关系计算得到测量像机的实时外参数。建立等效双目交会共线方程,并对特征点位置进行计算,在初始位置完成参数标定后,即可实现自动测量。实验结果表明,所提出的移动摄像测量方法的测量精度可达2.012mm,且自动化程度较高,可应用于大型结构的在线监测。
[Abstract]:In order to solve the problem that the surface area of large structures is large and the field of vision of camera is limited, a method of moving camera measurement based on transfer camera is proposed, which can be used for global scanning measurement of large structures. The transfer camera connected to the mobile platform is used to collect the image of the reference mark point, and the camera parameter calibration method is used to calculate the external parameters of the camera, and the relative transformation relation of the coordinate of the mobile platform at the adjacent time is obtained. The measuring camera is driven by the mobile platform to collect the feature points around the structure surface. The real time external parameters of the measuring camera are calculated by using the coordinate transformation relation of the moving platform. The collinear equation of equivalent binocular rendezvous is established, and the characteristic point position is calculated. After the initial position is calibrated, the automatic measurement can be realized. The experimental results show that the measurement accuracy of the proposed method can reach 2.012mm and the degree of automation is high. The method can be applied to the on-line monitoring of large structures.
【作者单位】： 火箭军工程大学控制工程系;火箭军工程大学信息工程系;
【基金】：国家杰出青年科学基金(61025014) 国家自然科学基金(61174030,61104223)
【分类号】：P235
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本文编号：2411533