A profile error evaluation method for freeform surface measured by sweep scanning on CMM

He, Gaiyun; Sang, Yicun; Wang, Hongliang; Sun, Guangming

doi:10.1016/j.precisioneng.2018.12.008

Cited by 19 publications

(8 citation statements)

References 22 publications

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“…As shown in Fig. 14, wavelet decomposition is employed to extract the key points set that represents the scanning data [232]. To shorten the production cycle, spatio-temporal adaptive sampling is proposed to inspect freeform components [233,234].…”

Section: Intelligent Sampling Strategymentioning

confidence: 99%

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Development of surface reconstruction algorithms for optical interferometric measurement

2020

Front. Mech. Eng.

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Optical interferometry is a powerful tool for measuring and characterizing areal surface topography in precision manufacturing. A variety of instruments based on optical interferometry have been developed to meet the measurement needs in various applications, but the existing techniques are simply not enough to meet the ever-increasing requirements in terms of accuracy, speed, robustness, and dynamic range, especially in on-line or on-machine conditions. This paper provides an in-depth perspective of surface topography reconstruction for optical interferometric measurements. Principles, configurations, and applications of typical optical interferometers with different capabilities and limitations are presented. Theoretical background and recent advances of fringe analysis algorithms, including coherence peak sensing and phase-shifting algorithm, are summarized. The new developments in measurement accuracy and repeatability, noise resistance, self-calibration ability, and computational efficiency are discussed. This paper also presents the new challenges that optical interferometry techniques are facing in surface topography measurement. To address these challenges, advanced techniques in image stitching, on-machine measurement, intelligent sampling, parallel computing, and deep learning are explored to improve the functional performance of optical interferometry in future manufacturing metrology.

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Section: Intelligent Sampling Strategymentioning

confidence: 99%

“…Profile error evaluation method for freeform surface: (a) Surface subdivision method and (b) key points distribution extracted from the scanning lines. Reproduced from Ref [232]. with permission from Elsevier.…”

mentioning

confidence: 99%

Development of surface reconstruction algorithms for optical interferometric measurement

2020

Front. Mech. Eng.

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“…The general approach is to measure the interior and exterior surfaces separately by using different probes. CMM [4] and machine vision [5] are two primary types of measurement methods. Nevertheless, these methods have the drawbacks of low efficiency, tedious data processing, and present the problems of secondary clamping errors under redundant operations.…”

Section: Introductionmentioning

confidence: 99%

Surface bilateral profile measurement of curved transparent components based on chromatic confocal sensor

Jiang²,

Jiang³

et al. 2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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The system performance of many industrial products is dominated by the surface profile accuracy of their primary component, thus it is of great essence to achieve high precision profile characterization. The chromatic confocal technology provides an effective means for precise measurement of surface profile, yet there exists non-negligible errors when measuring transparent curved component. The aim of this paper is to investigate the effects of the curvature of component on the confocal rays and obtain its bilateral surface profile by chromatic confocal technology simultaneously.The assumption of tilted plate approximation for curved specimen was made. By adopting the optical ray tracing analysis, a modified model was then proposed to correct the measurement error existed in the traditional one. The validity of the proposed model is conducted by 2D bilateral profile measurements of the hemispherical shells after the calibration with tilted fused silica plates. Experimental results show that the proposed model significantly improves the measurement accuracy of bilateral profile of curved transparent components at large equivalent tilt angle. This method overcomes the drawbacks of other spatial coordinate based profile measurement methods, and achieves high accuracy simultaneous measurement of bilateral profile of transparent components.

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“…Free-form surface parts are widely used in aerospace, automotive and other high-end equipment manufacturing fields [ 1 ]. It is one of the hotspots in the measurement field to measure their precise geometric quantities and ensure that they meet the accuracy requirements.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Hybrid Sampling Method for Free-Form Surfaces Based on Geodesic Distance

Chen

Jia

et al. 2023

Sensors

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High precision geometric measurement of free-form surfaces has become the key to high-performance manufacturing in the manufacturing industry. By designing a reasonable sampling plan, the economic measurement of free-form surfaces can be realized. This paper proposes an adaptive hybrid sampling method for free-form surfaces based on geodesic distance. The free-form surfaces are divided into segments, and the sum of the geodesic distance of each surface segment is taken as the global fluctuation index of free-form surfaces. The number and location of the sampling points for each free-form surface segment are reasonably distributed. Compared with the common methods, this method can significantly reduce the reconstruction error under the same sampling points. This method overcomes the shortcomings of the current commonly used method of taking curvature as the local fluctuation index of free-form surfaces, and provides a new perspective for the adaptive sampling of free-form surfaces.

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A profile error evaluation method for freeform surface measured by sweep scanning on CMM

Cited by 19 publications

References 22 publications

Development of surface reconstruction algorithms for optical interferometric measurement

Development of surface reconstruction algorithms for optical interferometric measurement

Surface bilateral profile measurement of curved transparent components based on chromatic confocal sensor

An Adaptive Hybrid Sampling Method for Free-Form Surfaces Based on Geodesic Distance

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