关键词: 大理石标定场, 多路激光测距, 基线边长法, 加速器, 设备标定

Abstract: Since large-scale photogrammetry is calibrated with traditional measuring cameras, with limited accuracy, a high-precision, large-scale three-dimensional calibration field establishment method is proposed. This method uses natural marble with good stability as the basic structure, and designs a horn pedestal, uses micron-level multi-beam laser ranging to obtain the distance between two points, and then directly establishes a high-precision 3D calibration field based on the baseline adjustment model. The method is verified by simulating multiple sets of approximate coordinates and observations on distance. The results show that the simulation error of the approximate coordinates of the calibration field cannot exceed 3 mm, mean square of weight is equivalent to the simulation error of observation on the distance, and the standard deviation of the inversed value and the theoretical value of the distance is half of the simulation error of the observations on the distance, which verifies the correctness of calculation models and procedures. The calibration field can not only provide large-scale calibration for the measurement camera, but also perform irregular inspection on the measurement performance of the laser tracker.

Key words: marble calibration field, multiple laser ranging, baseline length method, accelerator, equipment calibration