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<p>Technological advancements in image processing have led to innovative solutions in industrial applications, among which measurement systems based on the laser triangulation principle are included. In this study, an advanced vision sensor designed for direct application in the metal sheet bending industry and industrial quality control processes was proposed, utilizing a charge-coupled device (CCD) camera and red line laser light. Initially, the device was modeled in three dimensions according to the triangulation measurement principle in a computer environment and then its external casing was produced using 3D printer. To perform angle measurements that comply with industrial standards, two calibration methods were employed: the chessboard method for camera calibration and the pixel distance calibration method for measuring distance. The system, developed to be low-cost and portable, facilitates the acceleration of quality control processes and enables effective measurement operations within the industry without the need for specialized personnel. To assess the applicability of the proposed calibration method to the industry, extensive experimental tests were conducted on low-carbon steel and galvanized metal sheets that had been bent at a various angle using the air bending method. The results have proven that the proposed system meets industrial standards (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11740_2024_1327_Article_IEq1.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="31" /> </InlineMediaObject> <EquationSource Format="TEX">\(\pm 1^{\circ }\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>±</mo> <msup> <mn>1</mn> <mo>∘</mo> </msup> </mrow> </math></EquationSource> </InlineEquation>) and is suitable for use.</p>

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Design and calibration of a low-cost embedded system-based line laser sensor for measuring bending angle in industrial applications

  • 期刊论文

  • 发表日期：

    2025年1月24日

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  • İbrahim Sat,
  • Hasan Erdinç Koçer

摘要

Technological advancements in image processing have led to innovative solutions in industrial applications, among which measurement systems based on the laser triangulation principle are included. In this study, an advanced vision sensor designed for direct application in the metal sheet bending industry and industrial quality control processes was proposed, utilizing a charge-coupled device (CCD) camera and red line laser light. Initially, the device was modeled in three dimensions according to the triangulation measurement principle in a computer environment and then its external casing was produced using 3D printer. To perform angle measurements that comply with industrial standards, two calibration methods were employed: the chessboard method for camera calibration and the pixel distance calibration method for measuring distance. The system, developed to be low-cost and portable, facilitates the acceleration of quality control processes and enables effective measurement operations within the industry without the need for specialized personnel. To assess the applicability of the proposed calibration method to the industry, extensive experimental tests were conducted on low-carbon steel and galvanized metal sheets that had been bent at a various angle using the air bending method. The results have proven that the proposed system meets industrial standards ( \(\pm 1^{\circ }\) ± 1 ∘ ) and is suitable for use.