• Title/Summary/Keyword: 검사로봇

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Development of a VTR head inspection system (비데오 헤드 형상 검사 장치 개발)

  • 유영기;노병옥;오춘석
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.8-11
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    • 1996
  • In one VTR(Video Tape Recorder), two or more heads are used to record or reproduce video signals. To obtain a uniform quality of a VTR, video heads should have similar charcteristics such as geometrical shapes and electro-magnetic performances. This research is aimed to develop a visual inspection system that can measure four geoemtrical parameters;HO, HI, Tw and Cw. To obtain a high realable results, DSP based image board and target based image processing algorithms were used. A series of experiments was performed for one thousands of video heads. From observation of the experimental results, the system is found to show good performance for inspection of video heads.

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Placement inspection of the SMT components using 3-D vision (시각센서를 이용한 SMT 부품장착상태 검사)

  • 손영탁;오형렬;윤한종
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.605-608
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    • 1996
  • The aim of this thesis is to develop a SMT-components placement inspection system equipped with a visual sensor. The visual sensor, which consists of a camera and 2-layer LED illuminator, developed to inspect the component placement state such as missing, shift, flipping, polarity and tomb-stone. on PCB in the reflow-process. In practical applications, however, it is too hard to classify component from images mixed pad on PCB, cream solder paste and component. To overcome the problem, this thesis proposes the 2-layer illumination method and the heuristic image processing algorithms according to inspection type. To show the effectiveness of the proposed approach, a series of experiments on the inspection were conducted. The results show that the proposed method is robust to visual noise and variations in component conditions.

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Correction Method for Geometric Image Distortion and Its Application to PCB Inspection Systems (인쇄회로기판 검사를 위한 기하학적 영상 왜곡의 보정 방법)

  • Lee, Wan-Young;Park, Tae-Hyoung
    • Journal of Institute of Control, Robotics and Systems
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    • v.15 no.8
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    • pp.772-777
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    • 2009
  • The geometric distortion of image is one of the most important parameters that take effect on the accuracy of optical inspection systems. We propose a new correction method of the image distortion to increase the accuracy of PCB inspection systems. The model-free method is applied to correct the randomly distorted image that cannot be represented by mathematical model. To reduce the correction time of inspection system, we newly propose a grid reduction algorithm that minimize the number of grids by the quad-tree approach. We apply the proposed method to a PCB inspection system, and verify its usefulness through experiments using actual inspection images.

Development of a magnetic caterpillar based robot for autonomous scanning in the weldment (용접부 자동 탐상을 위한 이동 로봇의 개발)

  • 장준우;정경민;김호철;이정기
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.713-716
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    • 2000
  • In this study, we present a mobile robot for ultrasonic scanning of weldment. magnetic Caterpillar mechanism is selected in order to travel on the inclined surface and vertical wall. A motion control board and motor driver are developed to control four DC-servo motors. A virtual device driver is also developed for the purpose of communicating between the control board and a host PC with Dual 'port ram. To provide the mobile robot with stable and accurate movement, PID control algorithm is applied to the mobile robot control. And a vision system for detecting the weld-line are developed with laser slit beam as a light source. In the experiments, movement of the mobile robot is tested inclined on a surface and a vertical wall.

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Development of automation system for relay assembly and test (릴레이 결합 및 검사 자동화 시스템 개발)

  • 국금환;최동엽
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.606-610
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    • 1991
  • A relay is the one of small electrical components for automobiles and used for industry widely. We have developed the automation system for relay assembly and test to make it improve the productivity and decrease the man power. In order to determine the objective process of automation, we investigated 6 small and medium sized-enterprises and 1 greate sized-enterprise producing relays. And, we selected 2 model enterprises of them. One of the two is the system to develop. The scope of our study is the analyse of the conventional workcell, the determination of the system specification, the design of the system layout, the determination of the system cycle time, the design of the system mechanism, and the development of the controller for the system. We think that the developed system may be solve the technical and the economical problems interrupted efficiential automation of domastic small and medium sized-enterprises, and improve the international competitive power.

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Feasibility Test for Radical reactions in Organic Light Emitting Diode (유기 발광 다이오드 내부의 라디칼 반응 가능성 검사)

  • Han, Chul-Hee
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.4
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    • pp.365-368
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    • 2008
  • Feasibility test for radical reactions in organic light emitting diode(OLED) has been applied on OLED consisting of hole transport layer(HTL) and electron transport layer(ETL). Organic molecules such as 4,4',-Bis[N-(1-naphthyl)-N-phenylamino] biphenyl(NPD) and 4,4',4"-tris(3-methylphenylphenylamino)triphenylamine(m-MTDATA) are chosen for hole transport layer(HTL) and Bathocuproine(BCP) for electron transport layer(ETL) in this study. Informations on energy and shape of frontier orbitals and data on radical reactions of simple aromatics from semiconductor($TiO_2$) photocatalysis have provided basis for determining feasibility for radical reactions in OLED. The outcome of our feasibility test would be useful in designing optimum molecule for organic layer with a view to extending the lifetime of OLED.

Device Design for Inspection Curved Pipes using the Mobile Robot (이동로봇을 이용한 곡관(Curved Pipes) 검사용 디바이스 설계)

  • 조현영;최창환;최용제;김승호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1458-1462
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    • 2003
  • High temperature and high pressure heavy water flows through the pipes in atomic power plants. The curved parts of pipes are critical parts in that they change the direction of steam flow, and these parts are especially affected by severe wear. Therefore, most pipes in atomic power plants are tested by non-destructive examination by workers who use ultrasonic sensors to measure the wall thickness of pipes. But not only are these pipes located in a very dangerous environment, but the space is also very limited. For the safety of workers, it is necessary to design a device that uses a mobile robot that can inspect curved pipes. This paper presents the design and construction of a small device that can generate the necessary contact forces between ultrasonic sensors and pipe walls in a limited space. And a mobile robot is used in place ortho worker for successful non-destructive examination.

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A Study on Vision System Design for Automatic Inspection of Steam Generator in Nuclear Power Plants (원전 스팀 제너레이터 세관 자동검사용 비젼시스템 설계에 관한 연구)

  • 한성현;서운학;천영신;이만형
    • Journal of Institute of Control, Robotics and Systems
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    • v.4 no.5
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    • pp.658-665
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    • 1998
  • In this paper, we propose a new approach to the development of the automatic vision system to examine and repair the steam generator tubes at remote distance. In nuclear power plants, workers are reluctant of works in steam generator because of the high radiation environment and limited working space. It is strongly recommended that the examination and maintenance works be done by an automatic system for the protection of the operator from the radiation exposure. Digital signal processors are used in implementing real time recognition and examination of steam generator tubes in the proposed vision system. Performance of the proposed digital vision system is illustrated by simulation and experiment for similar steam generator model.

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A study on automatic testing of powder metallurgy process using the visual inspection system (시각감시장치를 이용한 분말야금 공정의 검사자동화 기술개발에 관한 연구)

  • Kwon, Ki-Ryong;Choi, Jae-Youn;Choi, Sung-Lark
    • Journal of Institute of Control, Robotics and Systems
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    • v.3 no.1
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    • pp.89-93
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    • 1997
  • This paper describes the automatic testing system developed for powder metallurgy process using the visual inspection, and its some internal algorithms. The system consists of one unit from each of the five types of units; feeding, slot, vision inspection, volumn counter, and inferior good extractor units. Some applications of the system to powder metallurgy process has shown the possibility of reducing the rework and increasing the efficiency of operation.

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A Visual Inspection System for Gravure Printing Using Perimetric Mask and Symmetry Transform Algorithm (주변마스크와 대칭변환 알고리즘을 이용한 그라비아 인쇄 불량 검사시스템)

  • 이칠우;김만진;기명석
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.12
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    • pp.984-993
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    • 2003
  • In Gravure printing process, there are a lot of printing errors caused by expansion and contraction of printing materials and difficulty of printing of small letters, accordingly we cannot detect those errors with eyes. In this paper, we describe the algorithm which can detect small errors automatically in Gravure printing process and a real-time detection system adopting the algorithm. We present the Perimetric Mask algorithm that can eliminate tiny errors occurring near the contour of printing objects to achieve accurate inspection, and also construct an algorithm utilizing symmetry transform which can emphasize tiny errors to make a robust inspection system. We have made a system running in real-time and verified the efficiency of the algorithm.