• Journal of Digital Convergence
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• v.13 no.10
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• pp.337-342
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• 2015

SMT is an equipment that picks up electronic components and does precise placing onto PCBs. In order to do this, it stops in front of a camera installed in the middle to go over vision inspection. And after that it is move for placing. There are 16 different types of routes in this process. This paper presents the fastest algorithm to place (sLa-Camera-pLb) among all these routes. In order to do this, instead of stopping in front of camera the object should move on while going over the vision inspection. Among all possible tracks, this thesis will provide algorithm to find out the fastest tracks to do vision inspection and placing. And as a result, this thesis have demonstrated that this method can save about 16% of time compared to going over inspection while the object is standing still through simulation.

• KIPS Transactions on Software and Data Engineering
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• v.6 no.5
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• pp.223-228
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• 2017

SMT is an device that picks up electronic components and does precise placing onto PCBs. In order to do this, it stops in front of a camera installed in the middle to go over vision inspection. And after that it is move for placing. There are 16 different types of routes in this process. This paper compared to the moving time of three methods in the (sLa-Camera-pLa)type. The first method is stopping in front of the camera for vision inspection and placing components onto PCBs(stop-motion). The second method is moving in front of the camera for vision inspection without stopping(fly1-motion). The third method is inspecting the components when the speed of the X axis, the Y axis is the best and is placing components onto PCBs(fly2-motion). This paper shows the moving time of three methods is same. Therefore we proved that the stop-motion method can be placing in the fastest time without changing structure of the device in the (sLa-Camera-pLa)type.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2005.11a
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• pp.463-466
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• 2005

본 논문은 퍼지로직을 이용하여 메탈스텐실의 홀의 정상-불량 판단을 수행한다. 메탈스텐실 은 PCB의 SMD의 패드 위에 납을 도포하기 위해 사용되는 것으로, 레이저를 이용하여 패드모양과 동일하게 홀을 생성한다. 가공 시 발생하는 불량은 레이저 출력의 약화로 홀이 정상적으로 가공되지 않는 것이다. 검사를 위해 비전시스템을 이용하여 메탈스텐실에 대한 카메라이미지를 획득하고, 기준이미지는 메탈스텐실을 제조하기 위해 사용되는 거버 파일을 이용하여 생성한다. 퍼지로직의 입력변수는 각 이미지에서의 검사대상 홀의 위치오차와 크기비율이고, 출력변수는 홀의 정상판단율이다. 홀의 위치와 크기는 두 이미지에 대해 영상처리를 수행하여 계산한다. 퍼지규칙은 작업자의 판단 규칙을 적용하여 작성한다. 4종류의 메탈스텐실에 대해 정상-불량 판단을 위해 고정된 임계치를 사용하였을 경우와 제안된 퍼지로직을 적용한 실험결과에 대해 설명한다.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2439-2441
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• 2002

SMT형 인쇄회로기판 조립라인에서 SMD의 조립상태를 검사하는 검사기를 위한 경로계획 알고리즘을 제안한다. 경로계획 알고리즘은 FOV 생성 최적화와 생성된 FOV의 순서 최적화에 의하여, 검사기의 선체 검사 시간의 단축을 목표로 한다. 본 논문에서는 검사기 경로계획 문제를 수학적으로 모델링하고, 전체 검사 단계를 FOV 생성 단계와 순서결정 단계의 계층적 구조로 구성한다. 각 단계의 알고리즘은 FOV 생성 알고리즘과 TSP 알고리즘을 적용하여 구현한다. 제시된 알고리즘을 실제 검사장비에 적용하여 시뮬레이션하고, 그 유용성을 검증한다.

• Journal of the KSME
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• v.34 no.2
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• pp.112-117
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• 1994

최근의 전자기기는 반도체 기술의 급속한 발전에 따라 소형화, 고기능화 및 다양화 뿐만 아니라 경박단소화되는 추세에 있다. 이러한 시장의 요구에 대응하여 표면실장용 전자부품이 등장하여 그 사용이 점차증가하고 있고 여기에 발맞춰 국내 . 외 전자기기 제조업체가 제품내의 PCB를 SMD화하는 추세에 있다. 따라서 표면실장 부품의 조립을 위한 고밀도, 고정도의 실장기술의 개발이 요구되고 있다. 또한 부품 자동삽입 등 기존의 방법들로 조립된, 전자기기 내부에 사용 되는 PCB의 조립상태 및 각 부품의 특성들을 검사하기 위한 In-circuit Tester의 기술도 빠른 속도로 발전하여 자동화되어가고 있는 추세에 있다. 이에 따라 본 연구소에서는 '90년에 능 Mounter GCA-M2000 모델을 개발 완료하였고 현재 관련 사업부에서 양산중에 있으며, 아날로그 방식 및 디지털 방식의 In-circuit Tester 모델도 개발 완료하여 현재 양산 중에 있다. 이 지면을 빌어 소개할 기회를 갖고자 한다.

• Journal of Advanced Information Technology and Convergence
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• v.8 no.2
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• pp.139-145
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• 2018

Improvement of the speed of the gantry among equipment that mounts a chip using SMT can improve productivity. In order to improve the performance of the gantry, there are studies such as a method of increasing the speed of adsorption, the speed of the gantry by reducing the weight, and a method of facilitating the use of the gantry. But all of these are ways of improving equipment. In this paper, we propose a method to improve the speed of gantry mounting microchip. The method is to shorten the driving time of the gantry. To do this, calculate the driving time using the existing method. And we calculate the travel time using the method presented in this paper. As a result, the time calculated by the proposed method is reduced by 14%.

• KIPS Transactions on Software and Data Engineering
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• v.7 no.11
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• pp.405-410
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• 2018

When more parts are mounted in the same time in a surface mount equipment, the total output will increase and will improve productivity. In this paper, we propose a method to reduce the gantry drive time from the suction to the mounting of the component to improve the productivity of the surface mount equipment. The method was to find a way to get the maximum velocity in front of the camera during the vision inspection. In this paper, we have developed a stop-motion, fly1-motion, and fly2-motion drive time calculation algorithms for vision inspection and calculated the driving time of 3 methods and compared them. As a result, the fly1-motion method shortened the time by 13% and the fly2-motion method shortened the time by 18% than the stop-motion method.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.3
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• pp.207-215
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• 2013

This paper is channel assignment and scheduling techniques for efficient wireless AMI network. In AMI system, the multi-channel cluster network to be proposed defines the communication channel between NC (Network Coordinator) and CDA (Clustered Data Aggregator) as the network channel. CDA and OMD(Out Meter display) and communication channel between SMD(Smart Meter Device) are defined as the group channel. AMI network of the multi-channel cluster based in which the network channel and group channel is mixed increases the administration efficiency through the physical/logical consumer channel clustering. The reliability of inspection data through the channel use distinguished between the adjacent cluster is enhanced. In addition, the fast aggregation of data is possible and the size of a metering network is increased through the channel allocation of the multichannel cluster based.

• Journal of the Korea Convergence Society
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• v.10 no.9
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• pp.17-22
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• 2019

Gentry, an SMT equipment, is a device that absorbs electronic components from the feeder and mounts them correctly on the PCB. At this time, the gantry stops in front of the camera to check whether the parts are correctly adsorbed. In this paper, we propose a method to shorten the moving time by moving the gantry without stopping in front of the camera. This method shows that the moving time is shorter than that of the conventional method by finding a path that can be moved in the fastest time among the various moving paths. The proposed method (moving-motion) reduces the gantry travel time by 20% compared to the conventional method (stop-motion).

• KIPS Transactions on Software and Data Engineering
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• v.10 no.10
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• pp.385-390
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• 2021

The gantry is a device that moves fine chips from the feeder to the PCB. While the gantry is moving the part, the camera checks the condition of the part. The purpose of this paper is to find the path with the shortest travel time of the gantry and calculate the travel time according to the path. stop_motion is a way to check the status of the parts currently in use. This paper presents the moving_motion method and the fly_motion method with maximum speed in front of the camera. In addition the signature method was used to inspect the condition of the parts. When comparing the moving time of the three types of gantry, the moving_motion method improved by 9.42% and the fly_motion method by 17.73% compared to stop_motion. When the fly_motion method proposed in this paper is used for the gantry movement path, it is expected that productivity will be improved.