Patent ID: 8218131
Filing Date: 2012-07-10
Classification: G01C

Abstract:
1. A position measuring system, comprising a distance measuring unit for projecting and scanning a pulsed beam for measurement to a measurement area and for measuring a distance based on a reflected light of the pulsed beam for measurement and for obtaining a position data group in the measurement area, a digital image pickup unit for acquiring an image data by taking an image of the measurement area, a storage unit for storing at least two sets of position data groups and image data, acquired from at least two directions, by interrelating and associating the position data groups with the image data, and an arithmetic unit for matching two images based on the two sets of stored image data and for synthesizing the at least two position data groups via image matching, and wherein said arithmetic unit approximately sets up at least three points or more common to said two image data, and, after performing coordinate transformation on one of the images with reference to the three points or more, matching is performed on said two images, and coordinate transformation is further conducted by using the coordinates obtained by said image matching and wherein said arithmetic unit sets up at least three points or more common to the position data groups when two or more position data groups are to be synthesized, performs coordinate transformation by using all of the position data groups with reference to said points, and adjusts the synthesis of total position data groups.