GUO Xian-tao,JIA Yan.Self-calibration method for pulse-3D terrestrial laser scanner based on least-square collocation[J].Optics and Precision Engineering,2021,29(04):665-673.
GUO Xian-tao,JIA Yan.Self-calibration method for pulse-3D terrestrial laser scanner based on least-square collocation[J].Optics and Precision Engineering,2021,29(04):665-673. DOI: 10.37188/OPE.20212904.0665.
Self-calibration method for pulse-3D terrestrial laser scanner based on least-square collocation
To solve the problem of high correlation of parameters that restricts the reliability of the estimated parameters in the traditional self-calibration methods for pulse-terrestrial laser scanner, a novel self-calibration method is proposed based on the least square collocation method. An error model for total station has also been proposed. Using the calibration method, the calibration network benchmark can be flexibly defined by configuring the relevant prior weight information for the estimated parameters, and all the parameters are considered as observation values in the self-calibration adjustment. Additionally, by designing appropriate calibration network configuration and adopting the robust estimate with equivalent weight matrix to perform gross error detection and variance component estimation, this method effectively reduced the correlation between the estimated parameters and improved the reliability of self-calibration. Finally, the simulation results of Leica scan station showed that the proposed method can achieve low correlation and high-precision estimation of most parameters. The only significant correlation was between the parameters of collimation error and scanner azimuth (approximately 0.8; however, this correlation was effectively reduced to 0.5) in the four-station scanning design.
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