DEVICE FOR INSPECTING SHAPE OF ROAD TRAVEL SURFACE

摘要

The present invention is capable of inspecting with high accuracy the shape of a road travel surface when travelling at a low speed, and even when acceleration, deceleration, or stoppages occur frequently, and generates a highly reproducible road surface longitudinal profile. A photograph is taken along the longitudinal direction of a travel path by a photography means in a light section method via a travel surface photography means (21). Corrected image information, in which a tilt in photographic image information has been corrected using inclination information, is generated on the basis of the photographic image information, the inclination information, and movement information via a road surface profile generation means (7), and thereafter the corrected image information is arranged using the movement information. Vertical motion information pertaining to the travel surface photography means is specified from image contents of overlapped regions. One portion of the corrected image information is cut out, and extracted image information is generated. While the height of the corrected image is corrected using the vertical motion information from the corrected image information, the extracted image information is arranged sequentially, and connected, and the road surface profile is generated.

主权项

1. A device installed in a vehicle, for photographing road travel surface while the vehicle travels and inspecting a shape of the road travel surface based on photographic information obtained by the photographing, comprising
travel surface illumination means for emitting a light beam to the road travel surface along a travel surface photography axis set parallel to a travel direction of the vehicle, travel surface photography means installed in the vehicle at a predetermined reference angle for acquiring information necessary for a light section method by sequentially photographing from an oblique direction, with a predetermined photography range set as a unit, the travel surface photography axis in regions to which the light beam is emitted by the travel surface illumination means as a plurality of units of photography ranges of photographic images, and acquiring photographic image information, inclination information generation means for acquiring inclination information which shows inclination state of the travel surface photography means, movement information acquisition means for acquiring travel distance information of the vehicle, and road surface profile generation means for generating a road surface profile by generating corrected image information in which a tilt in the photographic image information has been corrected by using the inclination information, on the basis of the photographic imager information, the inclination information, and the movement information, then arranging the corrected image information by using the movement information, specifying vertical movement information pertaining to the travel surface photography means from image contents of overlapped regions, generating extracted image information by partially cutting out the corrected image information and, while correcting height of the corrected image by using the vertical movement information from the corrected image information, sequentially arranging and connecting the extracted image information.