Bridge crack detection method and system

The invention provides a bridge crack detection method and system, and relates to the technical field of bridge crack detection.A bridge is subjected to grid region division, so that a stress concentration region of the bridge is found according to the motion trail and vehicle weight data of each vehicle; and the combined sensing module is arranged at the bottom of the bridge in the stress concentration area to detect the crack, so that the position of the bridge where the crack is most easily generated can be positioned, point locations needing to be detected can be reduced, the detection cost is reduced, data needing to be detected are reduced, the response speed of the system is higher, and the detection accuracy is improved. Meanwhile, environment information of each detection point is detected, and a detection result is corrected by utilizing the environment information, so that the influence of environment temperature and wind power on the detection result is reduced, and the detection result is more ac