2026
article
OpenAlex
Shuyang Wang, Jian Liang, Jiehu Kang, Luyuan Feng et autres
Coordinate measuring machines (CMMs) are widely used in industrial freeform surface measurement due to their high precision. The measurement process primarily involves point sampling and surface reconstruction. In this process, the choice of sampling method directly affects measurement accuracy and efficiency. However, …
cn, us
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2025
article
OpenAlex
Jian Liang, Zefeng Sun, Jiehu Kang, Shanzhai Feng et autres
Geometric errors in coordinate measuring machines (CMMs) significantly degrade measurement accuracy. While laser tracking interferometer (LTI)-based compensation methods are widely used due to their high efficiency, the limited precision of existing positioning techniques restricts their application in ultra-high precision CMMs. To address …
cn
(code pays fourni par la source)
2025
article
OpenAlex
Shuyang Wang, Jian Liang, Jiehu Kang, Zefeng Sun et autres
Accurate calibration of scanning probes is essential for ensuring the measurement precision of coordinate measuring machines (CMMs). However, most existing calibration methods rely on linear models, which are inadequate for compensating nonlinear errors inherent in scanning probes. Furthermore, these methods often overlook …
cn
(code pays fourni par la source)
2024
article
OpenAlex
Zefeng Sun, Luyuan Feng, Yifei Chen, Zongyang Zhao et autres
Fringe projection profilometry (FPP) is widely used in the field of 3-D shape measurement with the advantages of noncontact, high speed, and nondestructive. However, measuring the complex reflective surface is a severe challenge for the FPP system. In this article, an active …
cn
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1988
conference-paper
OpenAlex
E. L. Church, Shanzhai Feng, P. Z. Takacs
This paper examines non-linear effects which appear in the measurement of surface topography by phase-shifting interference microscopy due to the non-linear relationship between the measured profile, Zm(x), and the true profile, Zt(x). To lowest order this is where P(x) is the point-spread …
us
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