• Title/Summary/Keyword: Engineering Equipment

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Improvement of Seismic Safety of Nuclear Power Plants by Equipment Isolations (기기의 면진을 통한 원전의 내진안전성 향상)

  • 전영선;최인길
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • 2003.03a
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    • pp.93-100
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    • 2003
  • Seismic isolation systems can improve the seismic safety of nuclear power plants by decreasing seismic force transmitted to structures and equipment. This study evaluates the effectiveness of equipment seismic isolation systems by the comparison of core damage frequencies in non-isolated and isolated cases. It can be found that the seismic isolation systems increase seismic capacity of nuclear equipment and decrease core damage frequencies significantly. The effect of equipment isolation is more significant in the PGA range of 0.3g to 0.5g.

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3D Ground Terrain Processing Platform for Automated Excavation System

  • Kim, Seok;Kim, Tae-yeong;Park, Jae-Woo
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.669-670
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    • 2015
  • Efficient management of the construction heavy equipment is required to reduce the rate of carbon emissions and on-site accidents. The intelligent excavation system (IES) will improve the construction quality and productivity through information technologies and efficient equipment operation, especially in large earthwork projects. Three-dimensional digitized ground data should be required for identifying the path of heavy equipment and work-site environment. Rapid development of terrain laser scanners (TLS) is more readily to acquire the digital data. This study suggests the '3D ground terrain processing platform (3DGTPP)' including data manipulating module and analyzing module of the scanned data for intelligent earthmoving equipment operation. The processing platform consists of six modules, including scanning, registering, manipulating, analyzing, transmitting, and storing. 3D ground terrain processing platform presented in this study will provide fundamental information for intelligent excavation system (IES), which will increase the efficiency of earthworks and safety of workers in significant.

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CONSTRUCTION EQUIPMENT ACTIVITY RECOGNITION FROM ACCELEROMETER DATA FOR MONITORING OPERATIONAL EFFICIENCY AND ENVIRONMENTAL PERFORMANCE

  • Changbum R. Ahn;SangHyun Lee;Feniosky Pena-Mora
    • International conference on construction engineering and project management
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    • 2013.01a
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    • pp.188-195
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    • 2013
  • Construction operations generate a significant amount of air pollutant emissions, including carbon emissions. The environmental performance of construction operations is closely relevant to the operational efficiency of each resource employed, which indicates how efficiently each resource (e.g., construction equipment) is utilized. In this context, monitoring the operational efficiency of construction equipment provides key information in managing and improving the environmental performance and productivity of construction operations. In this paper, we report our efforts to measure the operational efficiency of construction equipment, using low-cost accelerometers. An experimental study and real-world case studies are conducted to demonstrate the feasibility of the proposed approach. The results have shown the potential of this approach as an economically feasible means of monitoring the environmental performance of construction operations.

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Development of an equipment preventing overheated in a car using the solar cell

  • Han, Jong-Soo;Seo, Chang-Jun
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.938-941
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    • 2003
  • In this paper we develop an equipment which prevents vehicles from overheating their inside due to exposure to direct sunlight in summer. Overheating of inside vehicle may give rise to accidents, for instances, dying from suffocation, the deformation of its internal equipment and the explosion from the cracks of its internal parts etc.. The equipment is operated under no starting engine. We adjust the overheating of the inside vehicle by operating the equipment. This equipment checks the temperature of the inside vehicle using temperature sensor. If the temperature increases more than reference temperature(a condition which can be given by the driver), the equipment will operate until the temperature of the inside decreases to the given temperature. Its power is obtained from solar cell. So the equipment keeps away overheating accidents as well as provides the drivers with optimized condition. And also it increases the ability of original car battery through solar cell.

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Dynamic Characteristics Analysis on Antenna Equipment by Experimental Method (실험적 기법을 통한 안테나장비 동특성 분석)

  • Shin, Joon-Yub;Lee, Jong-Hak;Kang, Young-Sik;Choi, Ji-Ho
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2012.04a
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    • pp.632-637
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    • 2012
  • Antenna equipment is transported being assembled to moving equipment and often subjected to vibration and shock excitation during transportation. In these circumstances, structural safety of antenna equipment must be secured. Wire rope isolators are assembled between moving equipment and antenna equipment to reduce the level of vibration and shock. In this paper, a isolator that are suitable to the system is selected and dynamic characteristics analysis of driving on antenna equipment is conducted using real system and the result is compared with response analysis. Also modal test of array-antenna pack-assembly is conducted and structural safety of that is secured by reinforcing its structure.

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A study on structural stability of Backgrinding equipment using finite element analysis (유한요소해석을 이용한 백그라인딩 장비의 구조안정성 연구)

  • Wi, Eun-Chan;Ko, Min-Sung;Kim, Hyun-Jeong;Kim, Sung-Chul;Lee, Joo-Hyung;Baek, Seung-Yub
    • Design & Manufacturing
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    • v.14 no.4
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    • pp.58-64
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    • 2020
  • Lately, the development of the semiconductor industry has led to the miniaturization of electronic devices. Therefore, semiconductor wafers of very thin thickness that can be used in Multi-Chip Packages are required. There is active research on the backgrinding process to reduce the thickness of the wafer. The backgrinding process polishes the backside of the wafer, reducing the thickness of the wafer to tens of ㎛. The equipment that performs the backgrinding process requires ultra-precision. Currently, there is no full auto backgrinding equipment in Korea. Therefore, in this study, ultra-precision backgrinding equipment was designed. In addition, finite element analysis was conducted to verify the equipment design validity. The deflection and structural stability of the backgrinding equipment were analyzed using finite element analysis.

The Development of Automated Building Equipment Design Process System Using 3D CAD (3차원 CAD정보를 활용한 건축설비설계 프로세스 시스템 개발방향)

  • Lee, Dong-Hyun;Jung, Woo-Shin;Kim, Young-Don;Song, Kyoo-Dong
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2008.04a
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    • pp.269-274
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    • 2008
  • It is attempted that the standardization of the construction, globalization of the engineering construction and an information oriented construction spread by setting a goal of the advanced construction industry and productivity increase of human resources within the country. Hence, it has been brought in the information oriented construction of BIM based technology for the field of construction and equipment of Korea. The current study that examines the possibility of application of 3D ; that is BIM based programs of building equipment, and make better the problems of 3D building equipment system through the Pilot Test, indicates the way of growth development about the construction of building equipment process system.

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Program Development for Vibration Performance Evaluation of Powder Transfer Equipment

  • Lee, Hyoung-Woo;Ryu, Jeong-Hyeon;Park, Noh-Gill
    • International Journal of Precision Engineering and Manufacturing
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    • v.7 no.2
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    • pp.60-65
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    • 2006
  • A vibrational model of powder transfer equipment based on the lumped parameter method was developed, in which the operating motion consists of surging, bouncing, and pitching. After decoupling the equation of motion, the vibrational excitation source of the pitching motion was removed. So the designers are able to plan the optimum design to adjust the motion trajectory of the powder transfer equipment. That is, a procedure to adjust the motion trajectory of powder transfer equipment by changing design specifications such as the installation position, the direction of the motor, the driving speed, the mass unbalance, the stiffness coefficient, and the installation position of the support spring, is presented in this paper. The powder transfer equipment manufactured according to the results of this study did not suffer fatigue destruction, since the maximum stress on the basket structure was sufficiently small.

Development of e-Catalog System for Overseas Construction Equipments (해외건설 기자재 전자카탈로그 시스템 구축)

  • Ahn, Ho-Jun;Park, Ho-Byung;Jang, Kwang-Sub;Youk, Jong-Gon;Lee, Jae-Chon
    • Korean Journal of Computational Design and Engineering
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    • v.13 no.2
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    • pp.98-108
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    • 2008
  • Plant, civil engineering and construction equipment data of overseas construction are obtained and then analyzed, classified and integrated by experts. With those refined data set, we built classification system and defined property information with reference to international standard (ISO 15926, IRDL). If class in ISO 15926 is predefined for equipment of interest, we used the class as is. If not, we created and defined new classes on the basis of ISO 15926 classes. If there is similar class for equipment of interest, extension or inheritance methods were used. As a result, classification system of five levels and 637 classes were built and construction equipment information were expressed in open structure of XML such as tree structure of classification system and detailed information with number equipments for each specific equipment. We also developed the electronic catalog system which is basically equipment information management system providing various product search functions.

SCADA System for Semiconductor Equipment Condition Monitoring (반도체 장비상태 모니터링을 위한 SCADA 시스템 구현)

  • Lee, Youn Ji;Yun, Hak Jae;Park, Hyoeun;Hong, Sang Jeen
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.4
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    • pp.92-95
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    • 2019
  • Automation control and the data for control of industrial equipment for the diagnosis and prediction is a key to success in the 4th industrial revolution. It increases process efficiency and productivity through data collection, realtime monitoring, and the data analysis. However, university and research environment are still suffering from logging the data in manual way, and we occasionally loss the equipment data logging due to the lack of automatic data logging system. State variable presents the current condition of the equipment operation which is closely related to process result, and it is valuable to monitor and analyze the data for the equipment health monitoring. In this paper, we demonstrate the collection of equipment state variable data via programmable logic controller (PLC) and the visualization of the collected data over the Web access supervisory control and data acquisition (SCADA). Test vehicle for the implementation of the suggested SCADA system is a relay switched physical vapor deposition system in the university environment.