Fixing positions and orientations of laser trackers during bundle adjustment in multi-station measurements

Fixing positions and orientations of laser trackers during bundle adjustment in multi-station measurements
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在多站测量中束调整期间固定激光跟踪仪的位置和方向

DOI:
10.1088/1361-6501/abcd6b
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发表时间:
2020-12
影响因子:
2.4
通讯作者:
Xiao Li
Xiao Li
中科院分区:
工程技术3区
文献类型:
--
作者:
Zhaoyi Wang;Tao Luo;Wei Wang;Qingqing Huang;Xiao Li

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在加速器对准领域,多站测量的累积误差使得满足环形或直线隧道测量的更高精度要求具有挑战性。本文对激光跟踪器在光束调整过程中的定位和定向进行了研究。首先,采用混合最小二乘-总体最小二乘算法计算空间变换参数。然后,根据激光跟踪器光束平差的原理,设计了四种方案,并进行了比较,确定了哪种方案的精度最高。实验结果表明,在15m×10m×3m的范围内,固定各测站的位置和方位可使绝对点位误差从0.130 mm减小到0.069 mm,且测站定向优于测站定位。这项研究可以得出高精度的方案,有效地减少环形或直线隧道测量中的累积误差,也可以适用于其他机器人传感器。
The accumulated errors in multi-station measurements make it challenging to meet higher precision requirements for annular or straight tunnel measurements in the accelerator alignment field. In this paper, a study on fixing positions and orientations of laser trackers during the bundle adjustment is presented. First, we adopt the mixed least squares-total least squares algorithm to calculate the spatial-transformation parameters. Then, according to the principle of bundle adjustment based on laser trackers, we design four schemes and compare them to determine which scheme results in the highest precision. Experimental results show that fixing each station’s position and orientation can considerably decrease the absolute point errors from 0.130 to 0.069 mm within 15 m × 10 m × 3 m, and fixing stations’ orientations is better than fixing their positions. This research can derive high-precision schemes that effectively reduce accumulated errors in annular or straight tunnel measurements, and it can apply to other robotic sensors as well.
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