Analysis of Warm-up Effect on Laser Tracker Measurement Performance

Choleva, Radoslav; Kopáčik, Alojz; Erdélyi, Ján

doi:10.1007/978-3-030-51953-7_12

Cited by 1 publication

(1 citation statement)

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“…The position and temperature measurements were taken place at a frequency of every couple of days. During a single measurement process, when the temperature variation in the assembly workshop is slight and becomes stable, first the Leica AT-930 laser tracker is set up and turned on to avoid the warm-up effect on the laser tracker measurement performance [30,31]. Next the value of temperature measurement equipment was recorded, and the experimental variograms of the OK interpolation were fitted with the Gaussian model based on the measured temperature data.…”

Section: Methodsmentioning

confidence: 99%

Spatially discretised compensation method for coordinate transformation in large-scale metrology under nonuniform temperature field

Luo¹,

Yu²,

Wang³

et al. 2022

Meas. Sci. Technol.

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Temperature-variation-induced error compensation plays a pivotal role in large-scale metrology, in which the nonuniform temperature field would greatly influence the coordinate transformation process between different systems. This paper proposes a novel analytical thermal deformation compensation method with spatial discretisation modelling among 2-D distributed Enhanced Reference System points to reduce the thermal influence on the coordinate transformation process. First, the analytical thermal deformation model based on the spatial discretisation is established with the plane thermal elastic mechanics and the Finite Difference Method. Then the nonuniform temperature field model is developed based on Ordinary Kriging spatial interpolation. Finally, a compensation method for the coordinate transformation process is proposed based on the actual measurement data and the proposed thermal deformation model. The experimental results illustrate the existence and significance of the nonuniform feature of the temperature field. By the proposed compensation method, the coordinate transformation error is reduced by 47.13% and 76.67% in the x and y directions, respectively. The method is applicable to diminish the influence of thermal deformation under a nonuniform temperature field on the coordinate transformation of large-scale metrology.

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Section: Methodsmentioning

confidence: 99%