Low-cost design of a PCB imaging system based on laser triangulation

Abstract With the increasing miniaturization of electronic products, fanless design is required. The volume of electronic components, especially the height, is critical to the structural design of electronic devices. This paper proposes the design of on-line height measurement equipment based on com...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1920; no. 1; pp. 12090 - 12097
Main Authors An, Wanqing, Su, Xinming, Liu, Xiaoning, Zhu, Xi
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2021
Subjects
Centroids
Charge coupled devices
Electronic components
Electronic devices
Error analysis
Miniaturization
Physics
Structural design
Three dimensional models
Triangulation
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Summary:Abstract With the increasing miniaturization of electronic products, fanless design is required. The volume of electronic components, especially the height, is critical to the structural design of electronic devices. This paper proposes the design of on-line height measurement equipment based on commercial charge-coupled device (CCD), analyses the principle of height measurement of components, and explains the system composition and working principle of the measurement system. Moreover, it presents a comparative analysis of common methods for determining the center position, which include circle fitting, the gray centroid and extended method or Gaussian fitting, which generally lead to diverse results. The experimental results show that Gaussian fitting is better than other methods under realistic conditions, a three-dimensional model of the components is provided, and the error factors that affect measurement are analyzed.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1920/1/012090