MEASUREMENT METHOD AND MEASUREMENT SYSTEM FOR PROFILE DIMENSION OF RAILWAY VEHICLE, TARGET USED FOR THE MEASUREMENT METHOD, AND RAILWAY VEHICLE PROFILE DIMENSION INSPECTION SYSTEM EQUIPPED WITH THE MEASUREMENT SYSTEM

PROBLEM TO BE SOLVED: To measure the true value of a rail way vehicle such as the height of the truck or the roof from the rail level while improving the measurement efficiency, and preventing occurrence of human-induced error. SOLUTION: The rail way vehicle profile dimension measurement method is as follows: at least four digital cameras 1 to 4 for photographing are respectively fixed like holding the rail RL inbetween; a part of the vehicle is photographed obliquely from longitudinal direction at the time of measuring the objective rail way vehicle RV on the prescribed position on the rail, and every time when moving the vehicle a prescribed distance on the rail; images of targets provided on the plurality of points of the vehicle are imaged; image processing and operation processing are performed, based on the image data of each target so as to calculate the three-dimensional coordinate values; and from the combination of the three-dimensional coordinate values of the plurality of targets provided on the whole vehicle at each photographed position and the movement distance, the profile dimension of the vehicle is calculated. COPYRIGHT: (C)2008,JPO&INPIT