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A Method of Inspecting Non-woven Basis Weight Using the Exponential Law of Absorption and Image Processing

Department of Mechanical Engineering, Northern Taiwan Institute of Science and Technology, Beitou Taipei, Taiwan ROC, hclien{at}ntist.edu.tw

Chih-Hua Liu

Department of Mechanical Engineering, Northern Taiwan Institute of Science and Technology, Beitou Taipei, Taiwan ROC

This article explores a method of inspecting the non-woven basis weight on-line, by combining the exponential law of absorption and image processing technique. In the experiment, a theoretic equation for the charge-coupled device image-capture transmittance and non-woven basis weight was acquired through the exponential law of absorption. By using light source compensation and the least-squares approximation, the best approximate equations of transmittance and basis weight were acquired. According to the experimental results, the method of inspecting non-woven basis weight by image processing as proposed in this paper can reduce the uniformity of image gray scale from a coefficient of variation (C.V.) of 5.5 to 0.7%, raise the R ² of basis weight and transmittance to 0.998, and decrease the basis weight inspection error to 0.33%. The proposed method effectively enhances the accuracy and stability of non-contact inspection of non-woven basis weight. The result acquired herein can also be applied to the on-line uniformity inspection system with web as the basic material.

Key Words: non-woven basis weight • exponential law of absorption • image processing

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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Lien, H.-C. Articles by Liu, C.-H. Search for Related Content Social Bookmarking                   What's this?