Distortion measurement for shipboard radar antenna by photogrammetry

8th International Conference on Advanced Infocomm Technology

Zhao, Wenhua^1 ; Liu, Haibo^2 ; Liu, Xinming^1 ; Pan, Liang^1

China Satellite Maritime Tracking and Control Department, Jiangyin, Jiangsu, China^1

National University of Defense Technology, Changsha, China^2

关键词: Bundle adjustments;    Calibrated cameras;    Deformation measurements;    Deployable structure;    Distortion measurement;    Flexible operation;    Reference points;    Spatial coordinates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/679/1/012052/pdf
DOI  :  10.1088/1742-6596/679/1/012052

来源: IOP

【 摘 要 】

An approach based on photogrammetry has been developed for the measurement of shipboard radar antenna deformation. In the proposed approach, the images of the radar antenna with diagonal reflecting mark points are captured at a few (at least two) different orientations by the calibrated cameras. Then, the mark points in different images are detected and matched automatically with the information of reference points. At last, the optimum spatial coordinates of diagonal marks and measuring cameras external parameters are achieved via bundle adjustment algorithm. The theoretical analysis indicates that the proposed method precision can reach 1.0mm and has the advantages of high precision, convenient and flexible operation. This method can also be employed in deformation measurement of other large deployable structures.