2024/03/29 by Xiaohua Tong, Yi Gao, Zhen Ye +8
Computer Science · Engineering · Physics and Astronomy · #Advanced Measurement and Detection Methods #Advanced Optical Sensing Technologies #Optical measurement and interference techniques
paper · doi:10.1111/phor.12485
crossref issued 2024/03/29 · crossref published 2024/03/29 · crossref published-online 2024/03/29 · openalex publication_date 2024/03/29 · crossref created 2024/03/29 · crossref published-print 2024/06/01 · crossref deposited 2024/06/08 · openalex created_date 2025/10/10 · crossref indexed 2026/07/24 · openalex updated_date 2026/07/28
Abstract The dynamic measurement of position and attitude information of a long‐distance moving object is a common demand in ground testing of aerospace engineering. Due to the movement from far to near and the limitations of camera resolution, it is necessary to use multi‐binocular cameras for segmented observation at different distances. However, achieving accurate and continuous position and attitude estimation is a challenging task. Therefore, this paper proposes a dynamic monitoring technique for long‐distance movement based on a multi‐binocular videogrammetric system. Aiming to solve the problem that the scale in images changes constantly during the moving process, a scale‐adaptive tracking method of circular targets is presented. Bundle adjustment (BA) with joint segments using an adaptive‐weighting least‐squares strategy is developed to enhance the measurement accuracy. The feasibility and reliability of the proposed technique are validated by a ground testing of relative measurement for spacecraft rendezvous and docking. The experimental results indicate that the proposed technique can obtain the actual motion state of the moving object, with a positioning accuracy of 3.2 mm (root mean square error), which can provide a reliable third‐party verification for on‐orbit measurement systems in ground testing. Compared with the results of BA with individual segments and vision measurement software PhotoModeler, the accuracy is improved by 45% and 30%, respectively.