Angular error compensation for laser tracker

Rongsheng, 卢荣胜 Lu; Wan-hong, 李万红 Li; Da-bao, 劳达宝 Lao; Weihu, 周维虎 Zhou; Gongming, 丁功明 Ding

doi:10.3788/ope.20142209.2299

Cited by 8 publications

(1 citation statement)

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“…(5) Angular-error compensation The horizontal inclination values of two directions differing 90° are measured, and the measured space coordinate value of the laser tracker in the actual coordinate system is transformed to the horizontal coordinate system based on the coordinate transformation theory. The function is integrated in Spatial Analyzer, so it can be directly called to complete angular-error compensation and generate the horizontal coordinate system [3] .…”

Section: ) Determination Of Horizontal Inclinationmentioning

confidence: 99%

Testing levelness error of long cylindrical guide rail by laser tracker

Xu¹,

Lu²,

Guo³

et al. 2016

Proceedings of the 5th International Conference on Mechanical Engineering, Materials and Energy (5th ICMEME2016)

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Laser tracker has been widely applied in the field of long rails geometric tolerance measurement due to high precision, ease of use and other reasons. Round rail levelness measurement is used to be calculated by means of electronic level using the pitch method which is more cumbersome and error-prone. Based on the analysis of laser tracker leveling principle, we propose a new method using laser tracker measuring the level of the long cylindrical guide rail. With a project example, cylindrical guide rail located at altitude of 5m and 16m in length were proceeded for level measurement and the measured level of the long cylindrical guide rail is 0.03mm/m. The method broadened the field using a laser tracker. By using the laser tracker measurement principle in long long cylindrical guide rails levelness, it can also be applied to the parallelism, squareness, inclination and other measurement.

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Section: ) Determination Of Horizontal Inclinationmentioning

confidence: 99%

Testing levelness error of long cylindrical guide rail by laser tracker

Xu¹,

Lu²,

Guo³

et al. 2016

Proceedings of the 5th International Conference on Mechanical Engineering, Materials and Energy (5th ICMEME2016)

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TMT tertiary mirror axis calibration with laser tracker

Zhang

Yang

et al. 2015

Optoelectron. Lett.

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Visual measurement method for large-space dynamic angles

Wang

Duan

et al. 2020

Meas. Sci. Technol.

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In this paper, we propose a measurement method for dynamic angles in large-space based on machine vision and servo control. The azimuth and pitch angles are obtained in real time by identifying and tracking a cooperative target in a high-precision servo system with a camera. Furthermore, the distance between the target and the camera is calculated by means of a monocular measurement. Based on the measured angles and distance, the dynamic angle of the rotating object in test is derived according to the transformational relations. In order to decrease measurement errors, an error correction model is established by the connection between the measurement distance and observation errors caused by the camera, dynamic tracking and pose changing of the target plate. A manual displacement platform with high precision in two-dimensions is conducted to validate the effectiveness of the proposed approach. The experimental results show that, compared with the existing measurement methods, the proposed method enlarges the measurement range of large-space angles to 18.788 m, and the measurement errors of the azimuth channel and pitch channel are 0.018° and 0.019°, respectively, which achieve a high measurement accuracy and verify the validity of the method.

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Angular error compensation for laser tracker

Cited by 8 publications

References 0 publications

Testing levelness error of long cylindrical guide rail by laser tracker

Testing levelness error of long cylindrical guide rail by laser tracker

TMT tertiary mirror axis calibration with laser tracker

Visual measurement method for large-space dynamic angles

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