CALIBRATION DEVICE AND CALIBRATION METHOD OF LASER SCANNER

摘要

PROBLEM TO BE SOLVED: To provide a technology for calibrating a laser scanner without using any special apparatus.;SOLUTION: A target having a vertical plane S₁ whose both right-and-left sides are parallel and vertical is scanned horizontally by the laser scanner 1 from a measuring origin O_m in front of the vertical plane S₁, to thereby obtained point group data to measuring points to the number of M. An effective measuring point extraction part 13 specifies end measuring points A, B on the ends of both right-and-left sides of the vertical plane S₁ among the point group data, and extracts a relative coordinate of effective measuring points to the number of m between the end measuring points A, B. A coordinate determination means 14 sets a geodetic coordinate system based on a line (scanning line E₁ E₂) cutting the vertical plane S₁ by a locus of an optical axis, and determines a relation parameter for relating the relative coordinate to a geodetic coordinate so that the square sum of a distance d_A from an endpoint E₁ to the end measuring point A, a distance d_B from an endpoint E₂ to the end measuring point B, and each distance d_i from each effective measuring point P_i other than the end measuring points A, B to the scanning line E₁ E₂ becomes minimum.;COPYRIGHT: (C)2009,JPO&INPIT