TUNNEL DEFORMATION ONLINE MONITORING SYSTEM BASED ON IMAGE ANALYSIS AND APPLICATION THEREOF

摘要

A tunnel deformation online monitoring system based on image analysis and an application thereof. The online monitoring system comprises identification points (A, B, C), a network camera, a central control computer, and a transmission network. The application of the system comprises the following steps: 1) arranging the identification points (A, B, C); 2) the central control computer periodically controlling the network camera to carry out zooming photography; 3) the network camera transmitting photos to the central control computer; 4) the central control computer performing adaptive filter transformation on the photos; 5) the central control computer performing gray threshold value transformation; 6) the central control computer performing image edge detection to acquire the identification points (A, B, C); 7) calculating arch crown sinking displacement and arch springing convergence displacement of the identification points (A, B, C); and 8) determining whether the arch crown sinking displacement and the arch springing convergence displacement are smaller than set threshold values, and if so, returning to step 2), otherwise, giving an alarm. Compared with the prior art, the present invention has the advantages that the system is easy to implement and can realize online monitoring and automatic alarm.