Real-time position and orientation measurement with occlusion handling for distributed optical large-scale metrology systems

Liu, Zhexu; Zhu, Jigui; Yang, Linghui; Ye, Shenghua; Wu, Jun; Xue, Bin

doi:10.1117/1.oe.52.11.114101

Cited by 7 publications

(5 citation statements)

References 23 publications

(26 reference statements)

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“…Therefore, rotating angles

and

could be obtained according to calculation. Rotation rates of transmitters differ from each other, generally more than 1650 r/min [ 28 , 29 ]. The scanning laser planes could cover a 360° wide space and construct a light field to provide angular signals for receivers.…”

Section: Principles and Methodsmentioning

confidence: 99%

Automatic Guidance Method for Laser Tracker Based on Rotary-Laser Scanning Angle Measurement

Yang

Pan

Lin

et al. 2020

Sensors

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Laser-tracking measurement systems (laser tracker) have been playing a critical role in large-scale 3D high-precision coordinate measurement. However, the existing visual guidance of laser trackers is still limited by the disadvantages of operator-dependence, small-angle view field, time-consuming laser-guided process. This paper presents an automatic guidance method for laser trackers based on the rotary-laser scanning angle measurement technology. In this method, a special target consisting of six photoelectric receivers and a retroreflector is integrated into the rotary-laser scanning transmitter’ coordinate systems. Real-time constraints calculated by the proposed method would provide the coordinates of the target in a laser tracker coordinates system for guidance. Finally, the experimental results verified the automatic re-establish of sightline can be realized in horizontal 360° angle field within tens of arc-seconds, and this method is robust against the fast movement of the target.

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“…Therefore, rotating angles

and

Section: Principles and Methodsmentioning

confidence: 99%

Automatic Guidance Method for Laser Tracker Based on Rotary-Laser Scanning Angle Measurement

Yang

Pan

Lin

et al. 2020

Sensors

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“…2. OXYZ is the coordinate system for the transmitter, and the z axis is defined as the rotation axis [19][20][21]. The junction between plane 1 and rotation axis is the original point O.…”

Section: Mathematical Model and Measuring Principle Of Lompsmentioning

confidence: 99%

Optimization for calibration of large-scale optical measurement positioning system by using spherical constraint

et al. 2014

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The measurement accuracy of a large-scale optical measurement positioning system largely depends on the calibration procedure. A more reliable calibration approach for the system by using spherical constraints is presented in this paper, and both the adjustment model based on spherical constraint and the calculation method for the optimization are given. This approach can provide constraint in every direction of the system in the workspace and thereby estimate the orientation parameters more accurately than by using current methods. The experimental data show that by using the proposed method, which improves the accuracy of the depth direction, the average 3D coordinate error of the system compared with the laser tracker is about 0.18 mm in the whole workspace.

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“…11 x gm a 11 y gm a 11 z gm b 11 x gm b 11 y gm b 11 z gm c 11 x gm c 11 y gm c 11 z gm a 11 b 11 c 11a 21 x gm a 21 y gm a 21 z gm b 21 x gm b 21 y gm b 21 z gm c 21 x gm c 21 y gm c 21 z gm a 21 b 21 c 21…”

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Transmitter parameter calibration of the workspace measurement and positioning system by using precise three-dimensional coordinate control network

et al. 2014

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The workspace measurement and positioning system is a three-dimensional (3-D) coordinate system based on laser scanning, which is widely applied in large-scale metrology. As a core part ensuring measurement accuracy, the transmitter parameters' calibration is the critical technique of the system. The present transmitter parameter calibration method relies on auxiliary measurement equipment, which is more error prone and less efficient. This paper will focus on the improvement of the transmitter parameters' calibration by using a highly precise 3-D coordinate control network. Several calibration points with known coordinates are set in the workspace to establish the precise 3-D coordinate control network. After the new model of transmitter parameter calibration has been explained, both the calculation method for optimization and the production of the initial iteration value are given. As indicated by the results of the verifying experiment, the accuracy and efficiency of the transmitter calibration can be distinctly improved by using the proposed method. The experimental data show that the 3-D coordinate measurement error has obviously decreased from 0.3 to 0.15 mm as a merit of the proposed method.

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Real-time position and orientation measurement with occlusion handling for distributed optical large-scale metrology systems

Cited by 7 publications

References 23 publications

Automatic Guidance Method for Laser Tracker Based on Rotary-Laser Scanning Angle Measurement

Automatic Guidance Method for Laser Tracker Based on Rotary-Laser Scanning Angle Measurement

Optimization for calibration of large-scale optical measurement positioning system by using spherical constraint

Transmitter parameter calibration of the workspace measurement and positioning system by using precise three-dimensional coordinate control network

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