• 제목/요약/키워드: Mock-Up

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Application of Digital Mock-Up Technology for Detail Design and Construction of Bridge (교량 상세 설계 및 시공을 위한 DMU 기술 적응 방안 연구)

  • Lee, Yoon-Bum;Kim, Min-Seok;Lee, Kwang-Myong;Shin, Hyun-Yang;Park, Kyoung-Lae
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2007.04a
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    • pp.277-282
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    • 2007
  • In recent years, dramatic advances in information technology have motivated the construction industry to improve its productivity. Most construction companies are trying to utilize some new information technologies for enhancing the structure quality, shortening construction time, and reducing the construction cost. Digital Mock-Up (DMU) technology utilizes 3D CAD/CAM system that shows the shape of a structure on the computer screen. By modeling and assembling the structure in 3D dimensional environments, some errors in design can be found before or during construction. In this paper, DMU technology was applied to the detail design and construction of In-Cheon Bridge and its effectiveness was evaluated. All components of a PSC box girder segment were modeled and assembled by using of 3D CAD tools and then, some interferences between components and errors were found and revised appropriately before construction. Consequently, DMU technology would improve the quality of the structure and reduce time and cost for construction.

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A Study on the Temperature Characteristics of the Floor Cooling System of Mock-up Experimentent (Mock-up실험에 의한 바닥복사 냉방시스템의 온도특성에 관한 연구)

  • Yoo, Ho-Chun;Lee, Young-A
    • Journal of the Korean Solar Energy Society
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    • v.28 no.6
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    • pp.48-57
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    • 2008
  • The research analyzed the distribution of the indoor temperatures of a radiant floor cooling system through mock-up experiments. It investigated the temperature difference of feed water, the vertical temperature difference of indoor air, the temperature difference of floor surface, and so on. The following is the results of the research. First, the research shows that the difference between indoor temperature and outside temperature was the smallest when the temperature of feed water was set at 16$^{\circ}C$. In addition, the temperature changes according to indoor positions (wall, room, floor, and ceiling) were the most uniform. Thus, the research found that the cold water temperature of 16$^{\circ}C$ is the most proper. In addition, it confirmed that the feed water temperature of 18$^{\circ}C$ is effective because the temperature can lower the temperature of a room to 13.55$^{\circ}C$, which is lower than the temperature of a non-cooling mode. Second, an investigation on the temperature distribution of vertical air in indoor space shows that the temperature distribution had a difference of 0.2 to 1.9$^{\circ}C$ on the average, which satisfies the range of 3.0$^{\circ}C$ in the standard of ISO.

Study of Efficiency Test and Subjective Responses about Pendent Task Lighting System Using Phosphor Luminescent Film LED (광기여 필름 LED 팬던트 작업조명시스템 주관평가와 성능검증)

  • Cha, Kwang-Seok;Kim, Hway-Suh
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.23 no.3
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    • pp.188-193
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    • 2011
  • For a long time work or study, pendent task lighting system prepared with phosphor luminescent film LED was developed for eye protection and working efficiency improvement. Developed lighting system was used together with pendent and ambient lighting. Such as, we made comfortable lighting environment system. Evaluation for developed lighting system, that had proceeded to Mock-up test and subjective evaluation. Also It had proceeded that lighting environment analyzed and compatibility valuation of installation. In subjective evaluation, the students have expressed themselves satisfied to phosphor luminescent film LED lighting system. In Mock-up test, It is not problem to intensity of illumination, luminance and color temperature. Therefore, developed LED lighting system was installed at the Daegu apartment. It is having a P.O.E study progress to phosphor luminescent film LED lighting system.

Analysis on Shrinkage Properties of High Performance Concrete According to Mock-Up Test (고성능 콘크리트의 Mock-Up 시험에 의한 수축특성 분석)

  • Koh Kyoung Taek;Jin Hu Lin;Ryu Gum Sung;Hwang Yin Seong;Kim Do Gyum;Han Cheon Goo
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.11a
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    • pp.545-548
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    • 2004
  • This paper is to investigate the shrinkage properties of high performance concrete (HPC) with mixture adjustment by using mock-up specimens. HPC with mixture adjustment needed a higher dosage of SP agent due to fluidity reduction and a larger dosage of AE agent due to the reduction of air content. Setting time of HPC with mixture adjustment exhibited earlier than that of control HPC by as much as 6 hours. HPC with mixture adjustment gained more than 70MPa of compressive strength. Autogenous shrinkage of Control HPC was found to be $-340\times40^{-6}$ at 49days when the expansion value by thermal effect was excluded and HPC with mixture adjustment $-175\times10^{-6}$, which was the half of the value of control HPC. Drying shrinkage of center section of HPC with mixture adjustment showed similar tendency with autogenous shrinkage because of no internal moisture movement, while surface section had larger drying shrinkage. The specimen embedded with reinforcing bar had smaller deformation caused by confinement of reinforcing bar.

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Evaluation of Lighting Environment of Residential Space for Senior People by each Life Behavior with Mock-up Model (실물대 모형을 이용한 고령자 주거공간의 생활행위별 조명환경 평가에 관한 연구)

  • Kim, Byoung Soo;Yim, Oh Yon
    • KIEAE Journal
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    • v.7 no.5
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    • pp.35-40
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    • 2007
  • The purpose of this study is to execute evaluation experiment to know the evaluation property of lighting environment of residential space for senior people, considering visual characteristics along aging, and finally provide basic data for the lighting plan to ensure the visual amenity. Processes of this study are as follows;1) Analyzed the variation property of visual sensibility and visual ability of senior people along aging. 2) Selected 3 types of life behavior(rest, conversation and reading) after checking life behavior in residential space for senior people based on advanced study. 3) Made the Mock-up Model that Dimming is possible, actual furnace to model. 4) Executed sensitivity evaluation experiment about lighting environment. 5) Analyzed evaluation property of lighting environment of residential space for senior people. Results of this study are as follows, 1) With lens-filter, we got comfort and amenity in bulb-color lamp which has similar color temperature with red of lens filter. 2) Lighting environment tests during conversation : With lens filters, they felt comfort on bulb color in case of higher illuminance than 850lux and daylight color in 500lux. 3) Lighting environment tests at reading : With lens filter, bulb color got better score in brightness and appropriateness than daylight color.

A Study on the Strength Properties and the Temperature Hysteresis of Winter Concrete according to the difference of Curing Method in Mock-up Test (실물대시험에서의 양생방법 차이에 따른 한중콘크리트의 온도이력 및 강도특성에 관한 연구)

  • Won, Cheol;Han, Cheon-Goo
    • Journal of the Korea Institute of Building Construction
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    • v.3 no.4
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    • pp.87-94
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    • 2003
  • This study is to investigate the temperature hysteresis and development of compressive strength due to the curing conditions and to evaluate the optimum curing condition of test specimens showing the same development of strength to that of real structures in cold weather. The results of temperature curve with curing conditions in mock-up tests showed the trend of decrease plain concrete with insulation form, plain concrete with heating, concrete with accelerator for freeze protection, and control concrete in turn. The strength development of plain concrete of inside and outside of shelter showed the very slow strength gains due to early freezing, but that of concrete with accelerator for freeze protection showed the gradual increase of strength with time. From this, it is clear that accelerator for freeze protection has the effects of refusing the freezing temperature and accelerating the hardening under low temperature. Strength test results of small specimens embedded in members and located in insulation boxes at the site are similar to that of cores drilled from the members at the same ages, thus it is clear that these curing methods are effective for evaluating in-place concrete strength

Analysis of Crack Control Effect of Ultra-low Shrinkage Concrete through Wall Mock-up Test (벽체 실물대부재실험을 통한 초 저수축 콘크리트의 균열제어 효과 분석)

  • Seo, Tae-Seok;Lee, Hyun-Seung;Kim, Kang-Min
    • Journal of the Korea Institute of Building Construction
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    • v.22 no.1
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    • pp.45-55
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    • 2022
  • Ultra-low shrinkage concrete is very effective for securing the quality and appearance of a concrete structure because it can control the drying shrinkage cracks of the concrete structure to within a certain limit. In this study, with the purpose of commercializing ultra-low shrinkage concrete, the optimal amount of expansive agent and shrinkage reducing agent was determined through a lab test, and a concrete wall mock-up test was conducted to examine the shrinkage properties and crack control effects of ultra-low shrinkage concrete. As a result, it was confirmed that there was little drying shrinkage deformation in the wall specimen, and furthermore that no cracks were generated.

Development of a dry mock-up system for verifying pyroprocess automation

  • Seungnam Yu;Dongseok Ryu;Byugsuk Park;Jonghui Han
    • Nuclear Engineering and Technology
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    • v.56 no.5
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    • pp.1913-1924
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    • 2024
  • This paper presents the design and operation of an autonomous robot for pyroprocess automation, which requires unique approaches beyond those used in industrial applications to achieve the desired performance. Maintaining an extremely dry atmosphere is crucial to handle various materials, including chloride, and an autonomous system ensures this dry environment. The drying room dehumidifier was carefully selected and designed to generate dry air, and different types of dry air conditioning performance were evaluated, including assessing worker accessibility inside the mock-up to determine the system's feasibility. Containers used for process materials were modified to fit the gripper system of the gantry robot for automation. The loading and unloading of process materials in each equipment were automatically performed to connect the process equipment with the robotic system. The gantry robot primarily operated through macro motion to approach waypoints containing process materials, eliminating the need for precise approach motion. The robot's tapered jaw design allowed it to grasp the target object even with imperfect positioning. Robot motions were programmed using a robot simulator for initial positioning and motion planning, and real accuracy was tested in a mock-up facility using the OPC platform.

Radiation-training system with a custom survey-meter mock-up in a browser-based mixed reality environment

  • Hiroyuki Arakawa;Toshioh Fujibuchi;Kosuke Kaneko;Yoshihiro Okada;Toshiko Tomisawa
    • Nuclear Engineering and Technology
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    • v.56 no.6
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    • pp.2428-2435
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    • 2024
  • Training for radiation protection and control requires a visual understanding of radiation, which cannot be perceived by the human senses. Trainees must also master the effective use of measuring instruments. Traditionally, such training has exposed trainees to radiation sources. Here, we present a novel e-training strategy that enables safe, exposure-free handling of a radiation measuring tool called a survey meter. Our mixed reality radiation-training system merges the physical world with a digital one. Collaborating with a mixed reality headset (HoloLens 2), this system constructs a mock-up of a survey meter in real-world space. The HoloLens 2 employs a browser-based application to visualize radiation and to simulate/share the use of the survey meter, including its physical movements. To provide a dynamic learning experience, the system adjusts the survey-meter mock-up readings according to the operator's movements, distance from the radiation source, the response time of survey meter, and shielding levels. Through this approach, we expect that trainees will acquire practical skills in interpreting survey-meter readings and gain a visual understanding of radiation in real-world situations.

Development of the Maintenance Process Using Virtual Prototyping for the Equipment in the MSM's Unreachable Area of the Hot cell

  • Lee, Jong-Youl;Song, Tai-Gil;Kim, Sung-Hyun;Yoon, Ji-Sup
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1354-1358
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    • 2003
  • The process equipment for handling high level radioactive materials like spent fuels is operated in a hot cell, due to high radioactivity. Thus, this equipment should be maintained and repaired optimally by a remotely operated manipulator. The master-slave manipulators(MSM) are widely used as a remote handling device in the hot cell. The equipment in the hot cell should be optimally placed within the workspace of the wall-mounted slave manipulator for the maintenance operation. But, because of the complexity in the hot cell, there would be some parts of the equipment that are not reached by the MSM. In this study, the maintenance process for these parts of the equipment is developed using virtual prototyping technology. To analyze the workspace of the maintenance device in the hot cell and to develop the maintenance processes for the process equipment, the virtual mock-up of the hot cell for the spent fuel handling process is implemented using IGRIP. For the implementation of the virtual mock-up, the parts of the equipment and maintenance devices such as the MSM and servo manipulator are modeled and assembled in 3-D graphics, and the appropriate kinematics are assigned. Also, the virtual workcell of the spent fuel management process is implemented in the graphical environment, which is the same as the real environment. Using this mock-up, the workspace of the manipulators in the hot cell and the operator's view through the wall-mounted lead glass are analyzed. Also, for the dedicated maintenance operation, the analyses for the detailed area of the end effectors in accordance with the slave manipulator's position and orientation are carried out. The parts of the equipment that are located outside of the MSM's workspace are specified and the maintenance process of the parts using the servo manipulator that is mounted in the hot cell is proposed. To monitor the process in the hot cell remotely, the virtual display system by a virtual camera in the virtual work cell is also proposed. And the graphic simulation using a virtual mock-up is performed to verify the proposed maintenance process. The maintenance process proposed in this study can be effectively used in the real hot cell operation and the implemented virtual mock-up can be used for analyzing the various hot cell operations and enhancing the reliability and safety of the spent fuel management.

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