• Title/Summary/Keyword: 3차원 레이저 스캐너

Search Result 124, Processing Time 0.024 seconds

Integration of 3D Laser Scanner and BIM Process for Visualization of Building Defective Condition (3D 레이저 스캐닝과 BIM 연동을 통한 건축물 노후 상태 정보 시각화 프로세스)

  • Choi, Moonyoung;Kim, Sangyong;Kim, Seungho
    • Journal of the Korea Institute of Building Construction
    • /
    • v.22 no.2
    • /
    • pp.171-182
    • /
    • 2022
  • The regular assessment of a building is important to understand structural safety and latent risk in the early stages of building life cycle. However, methods of traditional assessment are subjective, atypical, labor-intensive, and time-consuming and as such the reliability of these results has been questioned. This study proposed a method to bring accurate results using a 3D laser scanner and integrate them in Building Information Modeling (BIM) to visualize defective condition. The specific process for this study was as follows: (1) semi-automated data acquisition using 3D laser scanner and python script, (2) scan-to-BIM process, (3) integrating and visualizing defective conditions data using dynamo. The method proposed in this study improved efficiency and productivity in a building assessment through omitting the additional process of measurement and documentation. The visualized 3D model allows building facility managers to make more effective decisions. Ultimately, this is expected to improve the efficiency of building maintenance works.

Three-dimensional vibration measurement algorithm using one laser scanning vibrometer (한대의 LSV 를 이용한 3 차원 진동측정방법)

  • Kim, Dong-Kyu;Song, Ha-Jun;Park, Kyi-Hwan
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2012.04a
    • /
    • pp.935-939
    • /
    • 2012
  • 3D vibration measurement is achieved using one laser scanning vibrometer(LSV) and Laser scanner(LS) by moving the LSV to three arbitrarily locations from the principle that vibration analysis based on the frequency domain is independent of the vibration signal based on time domain. The proposed system has the same effect as using three sets of LSVs. It has an advantage of reducing equipment costs. Analytical approach of obtaining in-plane and out-of-plane vibration of surface is introduced using geometrical relations between three LSV coordinates and vibration measured at three different locations.

  • PDF

Extracting Image Information of the unmanned-crane automation system Using an Integrated Vision System (통합 비전 시스템을 이용한 무인 크레인 영상 정보 추출)

  • Lee, Ji-Hyun;Kim, Moo-Hyun;Park, Mu-Hun
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.15 no.3
    • /
    • pp.545-550
    • /
    • 2011
  • This paper introduces an Integrated Vision System that enables us to detect the image of slabs and coils and get the complete three dimensional location data without any other obstacles in the field of unmanned-crane automation system. Existing vision system research tends to be easily influenced by the environment of the work place and therefore cannot give the exact location information. To overcome these weaknesses, this paper suggests laser scanners should be combined with a CCD camera named Integrated Vision System. The suggested system is expected to help improve the unmanned-crane automation system.

DOT Classification Code Extraction through 3-Dimensional Features (3차원 특징을 이용한 DOT 분류 코드 추출)

  • 김재한;심재창
    • Proceedings of the Korean Information Science Society Conference
    • /
    • 2001.10b
    • /
    • pp.394-396
    • /
    • 2001
  • 본 논문의 목적은 타이어에 각인되어 있는 DOT 코드 문자를 효과적으로 추출하는데 있다. 기존의 DOT 문자 인식 방법에서는 카메라와 조명에 의한 2차원 영상에서 DOT 문자 추출을 시도하였는데, 타이어는 DOT 문자와 배경이 동일한 색상이고, 조명에 민감해서 DOT 문자의 추출이 용이하지 않았다. 그래서, 본 논문에서는 타이어의 DOT 문자를 조명에 거의 영향을 받지 않는 3자원 레이저 스캐너를 이용해서 획득하고, 획득된 영상에서 높이 값 정보를 추출했으며 추출된 높이 값 정보를 가진 영상에 패턴 인식 기법을 적용하여 DOT 문자를 효과적으로 추출할 수 있었다.

  • PDF

Earthwork Volume Calculation of Anchorage Underground Capacity Using Laser Scanner (레이저스캐너를 이용한 앵커리지 지하공동의 토공량 산정)

  • Choi, Seok-Keun;Kim, Dong-Yeun
    • Journal of Korean Society for Geospatial Information Science
    • /
    • v.18 no.3
    • /
    • pp.21-27
    • /
    • 2010
  • When the capacity of underground caverns' structures is measured, a general surveying is difficult to decide an accurate section of irregular shape and a photographic surveying has problems on picture acquisition due to underground dusts, noise and lighting conditions, etc. The laser scanner system is being much used for 3-dimensional modeling such as topography, planimetric features and structures, etc. without a target by measuring arriving time of a laser pulse reflected after scanning the laser pulse and calculating space coordinates of the reflection position. Accordingly, the present research carried out section and earthwork volume measurement of a tunnel by using a laser scanner in underground anchorage excavation work that a bridge construction is being executed.

Reverse Design of F-Theta Lens for Compact Laser Scanner (소형 2차원 레이저 스캐너용 F-theta 렌즈 역설계)

  • Choi, Hae Woon
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.41 no.3
    • /
    • pp.213-218
    • /
    • 2017
  • In this study, a reverse design of the F-theta lens was proposed for a 2D scanner in remote welding applications. The curvature and distance of the lens were set as variables, and the focal length of the lens was set as the marginal ray height. The ZEMAX commercial software was used to perform a simulation with unlimited iterations for the optimization process. The target value was optimized using the internal Merit function with the weight factors of focal length and spot diameter. The number of lenses was four, and the focal length obtained from the results was 135mm that is slightly less than that of the commercial lens, which is set with a focal length of 185 mm. The calculated spot diameters are $1.3{\mu}m$, $6.2{\mu}m$, and $16.1{\mu}m$ for $0^{\circ}$, $12.5^{\circ}$ and $23^{\circ}$ of incident laser beam, respectively. It is expected that an optimized lens design is possible by performing the reverse design of a lens by the ray tracing method.

Development of the 3D Imaging System and Automatic Registration Algorithm for the Intelligent Excavation System (IES) (지능형 굴삭 시스템을 위한 모바일 3D 이미징 시스템 및 자동 정합 알고리즘의 개발)

  • Chae, Myung-Jin;Lee, Gyu-Won;Kim, Jung-Ryul;Park, Jae-Woo;Yoo, Hyun-Seok;Cho, Moon-Young
    • Korean Journal of Construction Engineering and Management
    • /
    • v.10 no.1
    • /
    • pp.136-145
    • /
    • 2009
  • The objective of the Intelligent Excavation System (IES) is to recognize the work environment and produce work plan and automatically control the excavator through integrating sensor and robot technologies. This paper discusses one of the core technologies of IES development project, development of 3D work environment modeling. 3D laser scanner is used for 3-dimensional mathematical model that can be visualized in virtual space in 3D. This paper describes (1) how the most appropriate 3D imaging system has been chosen; (2) the development of user interface and customization of the s/w to control the scanner for IES project; (3) the development of the mobile station for the scanner; (4) and the algorithm for the automatic registration of laser scan segments for IES project. The development system has been tested on the construction field and lessons learned and future development requirements are suggested.

A Study on Airborne LiDAR System Calibration and Accuracy Evaluation (항공LiDAR 시스템 검정 및 정확도 평가 연구)

  • Choi, Yun-Soo;Kong, In-Ku;Lee, Kang-Won
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.23 no.4
    • /
    • pp.359-366
    • /
    • 2005
  • Airborne LiDAR integrated with on-board GPS/INS and scanning technology is a state-of the-art system for direct 3D geo-spatial data acquisition. In this study, LiDAR data were calibrated using ground points in calibration site for the higher system accuracy. The accuracy results are ${\pm}15{\sim}30\;cm$ in horizontal and ${\pm}15\;cm$ in vertical. The results show that LiDAR system has capability for precise DEM and contour generation, 3D urban modeling and engineering design.

Extracting Three-Dimensional Geometric Information of Roads from Integrated Multi-sensor Data using Ground Vehicle Borne System (지상 이동체 기반의 다중 센서 통합 데이터를 활용한 도로의 3차원 기하정보 추출에 관한 연구)

  • Kim, Moon-Gie;Sung, Jung-Gon
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.11 no.3
    • /
    • pp.68-79
    • /
    • 2008
  • Ground vehicle borne system which is named RoSSAV(Road Safety Survey and Analysis Vehicle) developed in KICT(Korea Institute of Construction Technology) can collect road geometric data. This system therefore is able to evaluate the road safety and analyze road deficient sections using data collected along the roads. The purpose of this study is to extract road geometric data for 3D road modeling in dangerous road section and The system should be able to quickly provide more accurate data. Various sensors(circular laser scanner, GPS, INS, CCD camera and DMI) are installed in moving object and collect road environment data. Finally, We extract 3d road geometry(center, boundary), road facility and slope using integrated multi-sensor data.

  • PDF

3D Face Recognition using Nose Information (코 정보를 이용한 3차원 얼굴 인식)

  • 이영학;심재창;이태홍
    • Proceedings of the IEEK Conference
    • /
    • 2001.09a
    • /
    • pp.135-138
    • /
    • 2001
  • 본 논문에서는 3D 레이저 스캐너로 입력된 3차원 얼굴 영상에서 코의 특징 정보를 이용하여 얼굴을 인식하는 알고리즘을 제안하였다. 특히 3차원 영상은 주변의 조명 변화에 크게 영향을 받지 않는 장점이 있다. 이러한 정보를 이용하여, 제안된 알고리즘에서는 얼굴에서 가장 두드러지게 보이는 코의 3차원 정보를 이용하여 인식하는 알고리즘을 제안한다. 먼저 코를 추출한 다음, 회전된 3차원 영상에 대하여 정규화를 실시하고, 등고선을 이용한 영역기반의 방법과 특징기반의 방법을 이온하여 인식을 수행한다. 등고선을 이용한 영역기반은 3차원 얼굴 영상을 코끝의 좌표를 기준 점으로 등고선의 값이 10, 20, 30이 되는 영역을 추출 한 후 데이터 베이스 값들과 비교하여 각각의 차 영역에 대한 무게중심(X, Y), 픽셀 수, 분산을 구하여 순위가 가장 높은 것을 취한다. 특징 기반의 방법으로, 얼굴에 있어서의 실제의 코의 길이, 높이, 너비를 구하여 그 차가 가장 적은 것을 취한다. 위의 2가지 방법을 이용하여 인식을 수행 결과 100%의 인식률을 나타내었다.

  • PDF