Research on error accumulation control of three-dimensional adjustment with offset constraint

Wang, Xiaolong; Liu, Kang; Dong, Lan; Li, Bo; Lingling, Men; Luo, Tao; Wang, Tong; Jing, Liang; He, Zhenqiang; Zhang, Ke; Na, Ma; Shang, Lu; Han, Yuanying; Yan, Luping; Zhang, Luyan; Liu, Xiaoyang; Yan, Haoyue; Li, Chunhua; Wu, Lei

doi:10.1007/s41605-022-00350-4

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…In order to meet the higher alignment measurement accuracy requirements, a combined measurement approach can be employed integrating both total station and laser tracker. By utilizing the high-precision long-distance angle measurement capability of the total station and the highprecision distance measurement capability of the laser tracker or other means [39,40], it becomes feasible to enhance the local relative measurement accuracy within the specific area and meet the alignment requirements.…”

Section: Discussion On the Alignment Efficiencymentioning

confidence: 99%

High-precision and high-efficiency measurement method of accelerator tunnel control network based on total station angle observation

Xing,

Dong,

Wang

et al. 2023

Meas. Sci. Technol.

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Given the importance of accelerator devices, major developed and emerging countries around the world have invested substantial human and material resources into the development, construction, and operation of more advanced large-scale accelerator devices. High-precision and high-efficiency alignment of the control network is crucial for the stable operation of accelerators. This study proposes a method for measuring tunnel control networks using total station angle observation. By taking advantage of the high precision of angle observation with a total station, we use the measured results of the designed and deployed control points measured by the laser tracker to simulate the total station angle observations, combined with some length scale values in the control network measured by the laser range finder. With the angle observations and several known distances, the point coordinates can be calculated by angle intersection methods. Only angle observations are used from total stations, while different length scale reference conditions are added to constrain the control network. This is done by calculating the point accuracy of the China Spallation Neutron Source circular accelerator. The overall plane point accuracy can reach 66 μm. By using this method, personnel will spend less time on the site and are at lower risk of radiation exposure, for example by automating measurements at night. This method can be used at nighttime for measurements, avoiding the need for daytime work and shielding employees from severe radiation exposure. By employing this method, efficiency can be increased twice. For on-site measurement, it enables monitoring and automated measurement during operation, as well as providing reference for the installation and measurement of tunnel control networks for large scale accelerators such as the Circular Electron Positron Collider.

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Section: Discussion On the Alignment Efficiencymentioning

confidence: 99%

High-precision and high-efficiency measurement method of accelerator tunnel control network based on total station angle observation

Xing,

Dong,

Wang

et al. 2023

Meas. Sci. Technol.

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show abstract

“…In the tunnel to carry out measurement, it has to use multi-station overlap method and rely on the common points to transfer spatial position relation. In this situation, for long distance measurements, the error accumulation must be controlled [4]. CEPC has tens of thousands of components, its beam line length is more than 100 km, the measurement work is very heavy.…”

Section: Jinst 19 T02010mentioning

confidence: 99%

CEPC survey and alignment

Wang,

Li,

Dong

et al. 2024

J. Inst.

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For CEPC such big size machine survey and alignment, several key issues need to be considered: the measurement and data processing method, error accumulation control, the global and relative accuracy, the measurement efficiency, component alignment method and the deformation problem. To these issues an overall survey and alignment scheme was made. The global datums will be established for the measurement and data reduction. A multi-level control network will be built for the global and relative position control, the establish method and measurement method are introduced and the accuracies are estimated. To the component alignment, the schemes of fiducialization, pre-alignment and tunnel alignment are introduced, the deformation problem was analysed and monitor equipment will be applied. To improve the measurement efficiency a new kind of instrument was designed, the prototype has been fabricated and some experiments has been carried out.

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Research on error accumulation control of three-dimensional adjustment with offset constraint

Cited by 2 publications

References 4 publications

High-precision and high-efficiency measurement method of accelerator tunnel control network based on total station angle observation

High-precision and high-efficiency measurement method of accelerator tunnel control network based on total station angle observation

CEPC survey and alignment

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