• Title/Summary/Keyword: 비젼 검사

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Solder Paste Pattern Classification Using the XOR Operation in Vision Inspection Machines (비젼 검사시스템에서 XOR연산을 이용한 납땜형상의 패턴분류)

  • Lee, Chang-Gil;Hwang, Jung-Ho;Kim, Min-Soo
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2735-2737
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    • 2001
  • 비젼 검사시스템에서 기판에 존재하는 납 형상의 패턴을 분류함으로써 사전에 불량을 줄일 수 있다. 이러한 경우 대부분의 불량은 부정확한 납의 위치 및 두께로 인해 발생하게 되는데, 이러한 문제를 해결하기 위해 주어진 경계 내에 불분명하게 형성된 납의 형태 및 두께를 정상과 불량으로 분류하기 위해 무게중심점에 기초한 정합과 XOR연산을 이용한 비젼 검사시스템을 제안하였다. 제안한 비젼 검사시스템을 인쇄회로기판상의 납땜형상 패턴에 적용하여 제안한 방법의 성능을 검증하였다.

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최적 정합 알고리즘을 사용한 실시간 마킹/표면 비젼검사 시스템 개발

  • 노영동;주효남;김준식
    • Proceedings of the Korean Society Of Semiconductor Equipment Technology
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    • 2004.05a
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    • pp.132-137
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    • 2004
  • 반도체 소자의 마킹 / 표면 검사에 대한 적응적 reference 데이터 자동 획득 알고리즘과 검사에서의 실시간 정합 알고리즘을 개발하여, 모든 반도체 소자의 마킹 / 표면 검사에 대한 오류를 검출할 수 있는 마킹 / 표면 검사 시스템을 개발한다.

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Automatic Focusing Vision System for Inspection of Size and Shape of Small Hole (소형(1mm이하) hole의 형태 및 크기 측정을 위한 자동초점 비젼검사기)

  • Han, Moon-Yong;Han, Hern-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.10
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    • pp.80-86
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    • 1999
  • Since the quality of the coated wires is in various applications dependant on the coating depth, accuracy of hole size of dies used for coating wires must be maintained precisely, in general within one micron. This paper proposes a new vision system which measures automatically the size and shape of small holes having diameters less than 1mm within an error limit of 1 micron. To quickly obtain the focused image, this paper proposes an estimation method of the camera position using only a couple of defocused hole images. It measures the distributions of light intensity around the image boundary and decides the direction and distance of a camera motion. The proposed system measures the size, shape distortion, inclination of the hole against the axis of the dies structure, to decides the acceptability of the dies for use. The proposed algorithm has been implemented using a cheap 640${\times}$480 image system and has shown an average size error of 1micron when measuring the dieses having 0.1mm to 1.0mm diameters. It can be applied to the inspection of the size and position of holes in PCB, too.

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비젼시스템을 이용한 LED 검사

  • 김유건;유영기;최훈일;조용준
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.05a
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    • pp.279-279
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    • 2004
  • 1.개요 반도체 기술의 발전으로 에너지 효율이 높고 반영구적인 LED의 개발과 사용이 늘어나고 있는 추세이며, LED 관련 시장도 확대되고 있다. LED 생산에 따른 LED검사 시스템이 필수적인데도 아직 생산 현장에서는 목시검사에 의존하고 있으며, 시스템의 개발은 아직 미비한 상태이다. 몇몇의 비젼 검사관련 업체에서 비젼시스템을 이용한 LED 검사 시스템을 개발하였고, 그 밖에 논문에서 LED 검사 시스템을 개발하고 연구한 바가 있으나, 기존의 LED검사 시스뎀은 전원을 넣어 실제 LED발광 이미지에 대한 검사를 하는 것이 아니라 꺼진 상태에서의 LED 형상에 대한 검사 시스템이다.(중략)

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Signal Processing and Design of a Visual Inspection System for hi~h density PCB's (고밀도 PCB의 비젼 검사 시스템의 설계 및 신호처리 기법에 관한 연구)

  • 김철우;윤한종;문영식
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.04a
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    • pp.675-679
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    • 1996
  • 제품의 소형화, 고성능화, 부품의 제작기술의 급속한 발전으로 SMD실장기술은 소형화, 고밀도화로 진 보를 이루어왔다. 그러나, 기존의 PCB 검사 방법으로는 정확하고, 균일한 검사가 어려워 이를 해결할 수 있는 검사 방법이 요구되어 왔다. Machine Vsion에 의한 검사는 균일하고 정확하며, 불량의 유형도 판별하여 전체 공정의 제어가 가능한 방법이다. 본 연구에서는 영상처리에 적합한 영상을 쉽게 얻을 수 있도록 고휘도 LED를 사용하고, 밝기 조절이 가능한 영상획득부를 설계하였으며, Morphology filter룰 사용하여 빠르고, 안정된 noise 제거 및 edge 검출 알고리즘을 구현하였다.

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A Study on the development of Automated Optical Glass Inspection System (광학용 유리자동검사기 개발에 관한 연구)

  • 구마끼
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1998.03a
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    • pp.82-87
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    • 1998
  • Laser printer, faximile and copy machine are a few examples of OA(office automation) system. In such a system, the reflecting mirror has been employed for transmitting a target image to optical device. Therefore, to develope a good quality of optical system, the quality control of optical mirror was required. In recent years, considerable efforts have been directed toward the development of automated optical glass inspection system because the inspection is eye-fatigue and monotonous job for humans to perform. In this paper, we propose a inspection system applying algorithm of image processing for detecting defects of optical glass such as pinhole, scratch. From the experiments, the proposed inspection system shows reliable results.

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Development of Welding Quality Vision Inspection System for Sinking Seat (차량용 싱킹시트의 용접품질 비젼 검사 시스템 개발)

  • Yun, Sang-Hwan;Kim, Han-Jong;Moon, Sang-In;Kim, Sung-Gaun
    • Proceedings of the KSME Conference
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    • 2007.05a
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    • pp.1553-1558
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    • 2007
  • This paper presents a vision based autonomous inspection system for welding quality control of car sinking seat. In order to overcome the precision error that arises from a visible inspection by operator in the manufacturing process of a car sinking seat, this paper proposes the MVWQC (machine vision based welding quality control) system. This system consists of the CMOS camera and NI machine vision system. The image processing software for the system has been developed using the NI vision builder system. The geometry of welding bead, which is the welding quality criteria, is measured by using the captured image with median filter applied on it. Experiments have been performed to verify the proposed MVWQC of car sinking seat.

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A Study on the 2-Dimensional Vision Inspection Algorithm for the Defects Detection of BGA Device (BGA 소자의 결함검출을 위한 2차원 비젼 검사알고리즘에 관한 연구)

  • Kim, Joon-Seek;Kim, Kee-Soon;Joo, Hyo-Nam
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.7
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    • pp.53-59
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    • 2005
  • In this paper, we proposed the 2-dimensional inspection algorithm for micro-BGA(Ball Grid Array) device using a vision system. The reposed method uses the subpixel algorithm for high precision. The proposed algorithm preferentially extracts the package area of device in the input image. After the extraction of package area, each ball areas are extracted by ball search window method. The parameters for inspection are calculated for the extracted ball area. In the simulation results, we have the average error within 17[${\mu}m$].

Customized Pattern-Recognition Technique using Vision Measurement System Development in New Car Manufacturing Process (패턴인식 기법을 적용한 신차 제조공정 맞춤식 비젼 계측시스템 개발)

  • Lee, Gyung-Il;Kim, Jae-yeol;Roh, Chi-sung;Choi, Choul Jun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.4
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    • pp.51-59
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    • 2016
  • Measurements of the automobile manufacturers are available anywhere and anytime, directly based on the criterion of failure is measured. The maintenance of high-precision production activities is direct evidence of the fact that competitive manufacturing activities are very important in determining the success of companies to recall defective starting from raw material costs. The current manufacturing sites produce calipers and clearance gauge the degree of tool only specific. Therefore, judging the quality, including the number of errors, requires a lot of attention to the dimension failures in day-to-day measurements and measurement tasks and duties repeated in difficult situations. In this paper, we aim to develop a vehicle manufacturing plant site using each of the manufacturing processes while operating a measurement tool. We display it using the Image Processing PC-based S/W with all those visual facts by management and recorded as image information a more accurate and current situation to obtain information and share visual measurements. We carry out research on the design and development vision inspection algorithm applied for pattern-recognition techniques that can help manufacturing site quality control.

High-Speed Inkjet Monitoring Module for Jetting Failure Inspection (잉크액적 토출불량 검출을 위한 고속 잉크젯 모니터링 모듈)

  • Shin, Dong-Youn
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.10
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    • pp.1521-1527
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    • 2010
  • Since inkjet printing is being employed in production lines of electronics and display industries, the tack time for inspection of jetting failure has become very important because the throughput of the inkjet printing system can be extended to the maximum limit by adopting a shorter jetting inspection time. The most popular method for inspecting jetting failure involves the use of a linear stage, a high magnification lens, and a charge coupled devicecamera. However, this conventional approach requires approximately 60 s to complete the jetting inspection and might not be suitable for a high-speed reciprocating jetting inspection in endurance tests due to the unwanted mechanical vibration. In this study, a novel concept of an inkjet monitoring module is introduced, which has an overall inspection time of 18 s. For the shorter tack time of jetting inspection, the parameters affecting the tack time are discussed in this paper.