Non-Lambertian Surface Inspecting System For Line Scan

The present invention relates to a non-lambertian surface inspection system for line scan. According to the present invention, the non-lambertian surface inspection system for line scan prevents a problem of a conventional surface inspection system, in other words, a problem of a glare phenomenon in...

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Bibliographische Detailangaben
Hauptverfasser: CHUN UNG JUN, YOON, YEO HAK, KWEON IN SOO, PARK SU YEOL
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to a non-lambertian surface inspection system for line scan. According to the present invention, the non-lambertian surface inspection system for line scan prevents a problem of a conventional surface inspection system, in other words, a problem of a glare phenomenon in case of inspecting a surface of a curved model, by using reflection and shadow in accordance with a lighting direction using a line scan camera and a plurality of illuminations biased at various angles. The non-lambertian surface inspection system for line scan includes: a surface inspection unit having a frame module including a photographing hole at an upper end and a curved mounting hole in at least one of one surface and the other surface, and a plurality of first illumination modules and a plurality of second illumination modules installed at the mounting hole and diagonally outputting light toward an object to be inspected which is placed on the bottom surface; a camera unit positioned on a photographing hole and generating a whole composite image including a first illumination image and a second illumination image by photographing the object to be inspected, which is positioned on the bottom surface, by passing through the photographing hole; and a controller unit controlling operation of the camera unit, selectively operating the first illumination module and the second illumination module, and receiving the first and second illumination images photographed by the camera unit. The frame module also includes: a light transmitting plate installed in the photographing hole and having a dot pattern on the upper surface to reflect light downwards; and a plurality of auxiliary illumination modules installed on a side of the light transmitting plate and lighting the inside of the light transmitting plate. The brightness of the auxiliary illumination modules is controlled by the controller unit (20). 본 발명은 Line Scan Camera와 여러 각도로 편향되는 복수 개의 조명을 이용하여 조사 방향에 따른 반사도, 그림자를 이용하여 기존의 표면검사 시스템이 갖는 문제 즉, 곡면 형태의 모델의 표면을 검사할 때 글래어 현상의 문제가 발생되지 않도록 한다. 이와 같은 본 발명은 일면과 타면 중 적어도 하나에 곡선형의 거치홀이 형성되고, 상단에 촬영홀이 형성된 프레임모듈, 상기 거치홀에 복수 개 설치되어 바닥면에 놓인 검사체를 향해 사선(斜線)으로 빛을 출력하는 제1조명모듈과 제2조명모듈을 포함한 표면검사부; 상기 촬영홀의 위에 위치하며 상기 촬영홀을 관통해 바닥면에 위치한 검사체를 촬영하며 제1조명이미지와 제2조명이미지를 포함하는 전체합성이미지를 생성하는 카메라부; 및 상기 카메라부의 작동을 제어하고, 상기 제1조명모듈과 상기 제2조명모듈을 선택적으로 작동시키며 상기 카메라부에서 촬영된 상기 제1조명이미지와 상기 제2조명이미지를 수신하는 제어기부를 포함하고, 상기 프레임모듈은, 상기 촬영홀에 설치되며 상면에 빛을 하부 방향으로 반사시키는 도트패턴이 형성된 투광판; 및 상기 투광판의 측면에 복수 개 설치되어