• 대한치과보철학회:학술대회논문집
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• 1998.11a
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• pp.62-62
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• 1998

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.1
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• pp.35-41
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• 2020

3D laser scanners are an effective way to quickly acquire a large amount of data about an object. Recently, it is used in various fields such as surveying, displacement measurement, 3D data generation of objects, construction of indoor spatial information, and BIM(Building Information Model). In order to utilize the point cloud data acquired through the 3D laser scanner, it is necessary to make the data acquired from many stations through a matching process into one data with a unified coordinate system. However, analytical researches on the accuracy of point cloud data according to the registration method are insufficient. In this study, we tried to analyze the accuracy of registration method of point cloud data acquired through 3D laser scanner. The point cloud data of the study area was acquired by 3D laser scanner, the point cloud data was registered by the ICP(Iterative Closest Point) method and the shape registration method through the data processing, and the accuracy was analyzed by comparing with the total station survey results. As a result of the accuracy evaluation, the ICP and the shape registration method showed 0.002m~0.005m and 0.002m~0.009m difference with the total station performance, respectively, and each registration method showed a deviation of less than 0.01m. Each registration method showed less than 0.01m of variation in the experimental results, which satisfies the 1: 1,000 digital accuracy and it is suggested that the registration of point cloud data using ICP and shape matching can be utilized for constructing spatial information. In the future, matching of point cloud data by shape registration method will contribute to productivity improvement by reducing target installation in the process of building spatial information using 3D laser scanner.

• Information and Communications Magazine
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• v.32 no.12
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• pp.32-37
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• 2015

본 글에서는 철도교통의 안전성 향상을 위해 철도건널목의 지장물을 검지하는 기술을 소개한다. 철도건널목에 자동차나 보행자 등 열차운행에 지장을 줄 수 있는 물체가 존재하는지 확인하기 위하여 현재 레이저빔 방식의 검지장치를 사용하고 있으나 기술적 한계와 문제점을 보이고 있다. 이를 극복하기 위해 2차원 레이저스캐너 센서를 적용하여 새로운 지장물 검지 시스템을 설계하였으며, 관심구간에 존재하는 물체의 크기와 방향을 검지하는 알고리즘을 탑재하여 효과적인 지장물 인식이 가능하도록 하였다. 제작한 시작품을 실제 운영노선에 설치하여 현장시험을 수행하였다. 본 글에서는 개발된 기술을 설명하고 현장시험 결과를 소개하고자 한다.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1998.10a
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• pp.252-257
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• 1998

레이저 프린터에 사용되는 스케너 모터의 안정적인 베어링을 개발하기 위해서 함유소결 베어링과 빗살무늬 유체베어링을 개발하였다. 함유소결베어링은 9,000~20,000 rpm까지에서 매우 우수한 마찰 및 접촉특성을 나타내었으며, 빗살무늬 유체베어링에서는 35,000rpm까지 우수한 특성을 나타내었다.

• The Optical Journal
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• s.104
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• pp.59-69
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• 2006

레이저 프린터나 디지털 복합기(MFP:MultiFunction Peripheral)에 탑재되는 레이저 기입 광 학계에는 주사 광학 소자(fθ렌즈, fθ미러)나 폴리곤 스캐너라는 광학 장치가 사용되고 있다. 본 고에서는 레이저 기입 광학계에 사용되는 광학 장치를 중심으로, 이들을 대상 으로 하는 최근의 계측 기술을 설명하면서 2020년을 향한 향후의 전망에 대하여 설명하 기로 한다.

• 대한치과교정학회:학술대회논문집
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• 2004.11a
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• pp.27-28
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• 2004

• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.192-195
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• 2016

레이저 광선은 CD 및 DVD 플레이어, 바코드 스캐너, 휴대용 포인터부터 엔터테인먼트용 빛 쇼, 군사용 무기에 이르기까지 다양한 용도로 사용되고 있다. 하지만 운항 중인 항공기에게 레이저 광선의 투시는 조종사의 시각적, 심리적 뿐만 아니라 항공기 항행시스템까지 악영향을 끼쳐 항공안전에 치명적 영향을 줄 수 있다. 또한 주변에서 쉽게 구할 수 있는 레이저 광선을 이용하여 항공기 테러용으로 쉽게 이용할 가능성도 제기되고 있다. 본 논문에서는 레이저의 특성, 인체에 미치는 영향, 레이저의 안전한 이용과 관련한 국내외 레이저 운영 정책 비교 및 비행 중 레이저의 영향을 최소화 할 수 있는 방법을 알아보았다.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2003.04a
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• pp.493-496
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• 2003

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.638-643
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• 2017

The 3D laser scanner operates by measuring the distance from the sensor to the target and operates on the same principle as Electronic Distance Measuring (EDM). Recently, 3D laser scanning technology has been rapidly developed in line with the strongly increasing demand for 3D information acquisition. Therefore, it is now possible to more easily acquire geometric information of various objects existing in real space. In this study, we constructed geospatial information by using new equipment which integrated 3D laser scanner and total station, and we suggest the possibility of using new technology for geospatial information construction by comparing and analyzing with existing methods. In the study result, we demonstrated the efficiency of the geospatial information constructed by integration of 3D laser scanner and total station. The proposed method is expected to shorten the time required for data acquisition compared to the existing method using the existing total station. Furthermore, it is possible to use various methods such as cross section analysis and volume calculation using the acquired data. In the future, spatial information construction by integration of 3D laser scanner and total station will help improve work efficiency in related fields.

• The Journal of the Korea Contents Association
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• v.18 no.6
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• pp.303-313
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• 2018

The purpose of this study is digitalization of earthwork such as development of 3D terrain analysis platform using latest technologies including unmanned aerial vehicle and terrestrial laser scanner to ultimately achieve earthwork automation. It is necessary to develop related element technologies and to establish regulations so that it can be applied to the domestic construction projects. As a result of pilot project about the earthwork surveying automation technology, it was confirmed that information such as terrain coordinates, soil, boring, and excavation volume is acquired smoothly. In this paper, we investigate related regulations and manuals in Japan and propose the improvement plan of domestic regulation. We plan to study regulations from early to final construction stage, combine with the 'regulation for public surveying', and improve the regulations in detail.