圆拟合算法，用于从扫描线点云数据中拟合圆弧，从而提取出弧段点集。-The circular fitting algorithm is used to fit the arc the point cloud data of the scan line to extract the set of arc points.

根据圆弧上多点的实测数据，拟合计算圆心坐标和圆的半径(According to the measured data of multiple points on the arc, the coordinates of the center of the circle and the radius of the circle are calculated and fitted.)