Abstract: Provided is a method for detecting damage to a deck of a bridge, the method allowing detection work to be achieved with less labor and being capable of reducing the time and cost needed for the detection work. From a road-surface measuring vehicle running on pavement 3 on top of a steel-plate deck 1, a thermal infrared video of the surface of the pavement 3 is acquired by a thermal infrared video camera. Based on the thermal infrared video, troughs 4 of the steel-plate deck 1 are detected to grasp the structure of the steel-plate deck 1. Residence of water inside prescribed trough members 41 and sealing diaphragms 42 is detected from low-temperature regions R2 from among regions corresponding to troughs 4 in the thermal infrared video, and from rectangular low-temperature sections L2 that surround the regions R2. Through cracks are detected in deck plates 2 that correspond to troughs 4 in which residence of water has been detected.

Abstract: Provided is a method for detecting damage to a deck of a bridge, the method allowing detection work to be achieved with less labor and being capable of reducing the time and cost needed for the detection work. From a road-surface measuring vehicle running on pavement 3 on top of a steel-plate deck 1, a thermal infrared video of the surface of the pavement 3 is acquired by a thermal infrared video camera. Based on the thermal infrared video, troughs 4 of the steel-plate deck 1 are detected to grasp the structure of the steel-plate deck 1. Residence of water inside prescribed trough members 41 and sealing diaphragms 42 is detected from low-temperature regions R2 from among regions corresponding to troughs 4 in the thermal infrared video, and from rectangular low-temperature sections L2 that surround the regions R2. Through cracks are detected in deck plates 2 that correspond to troughs 4 in which residence of water has been detected.

Abstract: An image receiving unit receives an image captured by a capturing device at a capturing interval of the predetermined distance. A movement direction acquiring unit acquires a movement direction of the vehicle based on calibration information acquired in advance and the image information. A database generating unit determines whether capturing position information of the image information and setting points of spatial codes are matched with each other. When they are matched with each other, the database generating unit associates the image information and the spatial codes with each other. When they are not matched with each other, a capturing position allocating unit executes a process of allocating the image information between the setting points of the spatial codes, and the database generating unit associates the allocated image information with a position between the spatial codes.