Abstract
This research introduces a precise and efficient detection method for feature-points distance measurement on the curved surface of large components based on tightly-coupled visual- Inertial measurement unit (referred to as IMU) such as forging, bridge, underwater pier, nuclear power and others manufacturing and quality monitoring sceneries. Basic algorithms and mathematical principles of the tightly-coupled monocular camera-IMU combined positioning module are utilized and real-time estimation model of the relative spatial attitude of the camera in the time domain is proposed. We study the calibration algorithm and mathematical principles of monocular camera external parameters during the measurement process and establish the estimation model of the relative spatial pose of the imaging surface and the object surface. The distance calculation model of the point to be measured on the space surface is established by fusing the camera's internal and external imaging parameters, imaging features and the theory of no distortion of the camera's optical axis. The distance measurement experiment device and the measurement system frame are constructed. The measurement results are validated by comparison against auxiliary target, image stitching and other measurement methods data. The target error within 20 m measured by the proposed method is controlled within 10 mm.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.