Pose-relay videometric method and ship deformation measurement system with camera-series

Measurement for ship deformation has been a difficult problem for the global ship building industry and navy equipment researches. So far, an effective and mature method to measure the 3-D position and attitude deformation in a long term still remains unavailable. An innovative pose-relay videometric is proposed, and then a pose-relay video-metrics measurement system for ship deformation is developed on the basis of principle research and experimental validations. It offers solutions to key technical problems of infrared marker facture and high-precision detection and multi-cameras synchronization and control, etc. Accordingly, sea trials were carried out, and reasonable, long-time, and continuous 3-D data of position and attitude deformations between the ship head and the stern were acquired. The experiments have implied the great applicability of the proposed method in the deformation measurement and long-term monitoring of ships and similar large structures.