Development of a Modeling Method for Monitoring Tunnel Deformation Based on Active Panoramic Vision Technology

A new approach is introduced to measure tunnel deformation by active panorama vision technology aiming at the long-distance tunnel, long maintenance intervals, limited repairing time, a little of deformation change of the tunnel. In order to monitor the tunnel deformation information, Firstly, the panoramic scanning image of tunnel section can be directly received when the Active Stereo Omni-Directional Vision Sensors (ASODVS) in the tunnel detection device is going through the tunnel to make a panoramic scanning, then the geometry information of target surface can be analyzed through extracting the reflected laser image from the picture captured, after that, the tunnel is reconstructed using spatial point cloud data, finally, the refactoring tunnel model precision is analyzed. The experimental research shows that the system has the advantages of high speed acquisition, more real-time, more detailed data, high visualization. It can meet the needs of the rapid qualitative and quantitative analysis.