Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
권호 표지

Hybrid Illumination System Design based on Illuminance Uniformity for Surface Inspection

표면 검사를 위한 조도 균제도 기반 하이브리드 조명계 설계

  • Cho, Eun Deok (Graduate school, Korea National University of Transportation) ;
  • Kim, Gyung Bum (Aeronautical & Mechanical Design Engineering, Korea National University of Transportation)
  • 조은덕 (한국교통대학교 대학원) ;
  • 김경범 (한국교통대학교 기계자동차항공공학부)
  • Received : 2019.09.04
  • Accepted : 2019.09.23
  • Published : 2019.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the hybrid illumination system for effectively detecting surface defects in steel plate with lowcontrast, non-uniformity and featureless is designed based on illuminance uniformity. First of all, characteristics of steel plate defects were considered and typical inspection illumination system is implemented. Optimum illumination parameters for uniformly illuminating an inspection area in the typical illumination system are selected based on the illuminance uniformity and illuminance distribution measurement. The illuminance uniformity and illuminance distribution are measured using an illuminometer based on the arduino. Through illuminance distribution analysis of the typical illumination, an hybrid illumination is designed by fusing bi-directional illumination and coaxial illumination. The hybrid illumination showed higher uniformity ratio and illuminance distribution than the typical illuminations. The hybrid illumination system showed the ability to uniformly illuminate the entire inspection region of steel plate surface.

Keywords

References

  1. Nirbhar N. et al., "Review of Vision-Based Steel Surface Inspection Systems", EURASIP J. on Image and Video Processing, No. 50, pp. 1-6, 2014.
  2. Cheol Ho Kim et al., "Classification of Surface Defect on Steel Stripby KNN Classifier", J. of Korean society for Precision Engineering, Vol. 23, No. 8, pp. 80-88, 2006.
  3. Bong gyu Ji, Sang Jin Park et al., "Inspection of Surface Longitudinal Microcrack in Thick Steel Plates Using Focused Surface Wave EMAT", J. of Korean Society for Nondestructive Testing, Vol. 37, No. 6, pp. 443-449, 2017. https://doi.org/10.7779/JKSNT.2017.37.6.443
  4. Eun Deok Cho, Gyung Bum Kim, "A Study on llumination Mechanism of Steel Plate Inspection Using Wavelet Synthetic Images", J. of Semiconductor & Display Technology, Vol. 17, No. 2, pp. 26-31, 2018.
  5. Byung In An, Gyung Bum Kim, "Development of Structured Hybrid Illumination System and Optimum Illumination Condition Selection for Detection of Surface Defects on Silicon Wafer in Solar Cell", J. of Korean Society of Mechanical Engineers, Vol. 36, No. 5, pp. 505-512, 2012. https://doi.org/10.3795/KSME-A.2012.36.5.505
  6. Jin Woo Son et al., "Experimental Study on Wash-out and Warpage in In-Mold Coating with Film Inserts", J. of Korean Society of Mechanical Engineers, Vol. 42, No. 3, pp. 213-219, 2018. https://doi.org/10.3795/KSME-A.2018.42.3.213