Translator Disclaimer
Paper
15 November 2011 Development of a lightweight portable optical measurement system for the print-through phenomenon of fiber-reinforced plastics
Author Affiliations +
Proceedings Volume 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation; 83213C (2011) https://doi.org/10.1117/12.905283
Event: Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 2011, Yunnan, China
Abstract
Due to the volumetric shrinkage of the resin and the induced residual stress during the curing process, the reflection on the gel-coating layer surface will be imperfect if twists and wrinkles exist on the gel-coating surface. This phenomenon is denoted as print-through phenomenon (PTP). Currently, the detection of PTP for most of the yacht industry using the composite materials is performed mainly by visual inspection, and its quality is needed to be quantified to determine their grades. Therefore, there is a need to develop a lightweight portable optical measurement system that can be applied quickly to inspect different levels of PTP for the fiber-reinforced plastics (FRP) of the yacht body. The measurement system was developed based on the scattering principle of a reflected laser fringe projected on to the workpiece surface. Two indexes, namely the profile peak-valley height and wave-height of the Fast-Fourier Transform based on the centerline of the extracted image profile, were proposed to quantify the PTP of a test specimen. The mean line width of the extracted image was applied to evaluate the surface roughness of the test specimen, based on the scattering theorem. A set of software programmed with Borland C++ Builder language was developed to calculate the proposed indexes and the mean line width. The developed measurement system has been taken to some yacht factories to do the on-site measurements. The measurement results were, in general, consistent with the surface conditions of the polished surfaces.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fang-Jung Shiou, Yao-Zih Lai, and Min-Long Tsai "Development of a lightweight portable optical measurement system for the print-through phenomenon of fiber-reinforced plastics", Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83213C (15 November 2011); https://doi.org/10.1117/12.905283
PROCEEDINGS
9 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT


Back to Top