• Title/Summary/Keyword: 에어로 시스템

Search Result 305, Processing Time 0.029 seconds

A Study on the Improvement of Anti-Fire System of Temples (사찰 화재예방시스템의 개선방안에 관한 연구)

  • Kong, Ha-Sung
    • Journal of the Korean Society of Hazard Mitigation
    • /
    • v.8 no.4
    • /
    • pp.87-90
    • /
    • 2008
  • This research is to study and analyze our country's management of disasters, the present condition of cultural heritages bases on the examples of temples, and Japan's safety management prevention of buddhist temple. As a result, this research aims to how to improve the temple fire prevention system. To improve the anti-fire system of temples, it is important to make new laws about fire lose to minimize cultural property lose. Secondly, to protect self-contained type fire alarm device, with aerosol type hand propelled fire extinguishers to prevent fire lose. Lastly, construction work of electric engineer is necessary to prevent temple fire loses.

Development of Ground Antenna Tracker for Drones Based on Satellite System (위성시스템 기반 드론용 지상 안테나 트래커 개발)

  • Se-jun Kim;Jong-pil Choi;Dong-huyn Oh;Da-jin-sol Kim
    • Journal of Advanced Navigation Technology
    • /
    • v.27 no.6
    • /
    • pp.740-745
    • /
    • 2023
  • This study proposes the development of an antenna tracker system using a satellite system to stabilize the communication status of drones and extend the communication distance. The location information of the drone and the ground station was used to maximize communication gain in the general fixed antenna method between the ground station and the drone. We developed a tracker system that can automatically and continuously aim the ground station's antenna at the drone. It is expected that the use of antenna trackers will improve the stabilization of communication conditions and expand the communication distance, thereby leading to the advancement of the drone industry.

Simulation study of smoke spread prevention using air curtain system in rescue station platform of undersea tunnel (해저터널 구난역 플랫폼 화재연기확산 방지를 위한 에어커튼 시스템 차연성능 시뮬레이션 연구)

  • Park, Sang-Heon;An, Jung-Ju;Han, Sang-Ju;Yoo, Yong-Ho
    • Journal of Korean Tunnelling and Underground Space Association
    • /
    • v.17 no.3
    • /
    • pp.257-266
    • /
    • 2015
  • This study introduce that we studied optimization and possibility of smoke spread prevention with air-curtain system in undersea tunnel named from Ho-Nam to Jeju line in domestic if a fire break out in train. To verify performance, air-curtain system is installed between rescue station platform and each door of passenger car to provide safety route to evacuator and we studied simulation model of various cases about 15 MW fire severity considering domestic specifications. As a result we verified the fact that CASE1(air jet with 15degree toward passenger car) and CASE 5 (air jet with 15degree toward passenger car and pressure air blast from cross passage) is best Smoke Spread Prevention and less inflow carbon monoxide. Through above results, we expect that air-curtain system is one of the facilities for fire safety and provide us safety platform route in undersea tunnel.

Development of the Air Stick Feeder for Inserting the Relay (릴레이 삽입을 위한 에어 스틱 피더의 개발)

  • Kim, Young-Min;Kim, Chi-Su
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.16 no.2
    • /
    • pp.1398-1402
    • /
    • 2015
  • In surface mount technology, the use of technology implemented using a Chip Mounter relay that is inserted into the junction box, etc. car is increasing. On the other hand, there is a need for technology to reduce the weight of the heavy component of the relay attached to different Stick Tube generally chips. Therefore, rather than existing technology, this study improved the algorithm of the system to provide a mechanical structure using Air to supply greater stability using this the component feeder utilizing the Stick Tube proposed technology. When the equipment installed in the Air Stick Feeder was used, the effectiveness, such as increased production and reduced disposal expense, was improved.

Developing Trend of Gas Separation Membrane for Dehumidification (제습용 기체분리막 개발동향)

  • Koh, Hyungchul;Lee, Choongsup;Ha, Seong Yong;Choi, Whee Moon;Rhim, Jiwon;Nam, Sangyong
    • Prospectives of Industrial Chemistry
    • /
    • v.14 no.3
    • /
    • pp.25-36
    • /
    • 2011
  • 압축공기 중의 수분은 공압설비의 모든 요소에 중대한 해를 입히며 밸브의 고착, 계기의 막힘 또는 공압기기의 오작동을 일으키며 생산하는 제품의 질에 있어서도 많은 해를 입혀서 제품의 질을 떨어뜨리는 역할을 하게 된다. 따라서 수분을 제거하는 방법이 필요하며 기존의 냉동식 및 흡착식을 대신하여 분리막 법이 적용될 수 있다. 현재 제습용 기체분리막 모듈은 적용이 시작된 단계에 있다. 제습용 기체분리막은 의료기기, 분석기기, Instrument air 장비에 응용이 진행되고 있다. 최근 들어 선진각국 뿐만 아니라 국내에서도 막소재 개발, 복합막 개발, 모듈 개발, 시스템 설계 및 제작 기술 개발이 진행되고 있다. 현재로서는 제습막공정에 적합한 막소재의 개발이 시급하지만 이후 적용확대를 위해서는 제습용 기체분리막의 신뢰성 향상을 위한 다각도의 노력이 필요하다.

Development of training-education system for early childhood and adolescence (청소년의 인지능력 훈련을 위한 운동-학습 시스템의 개발)

  • Choi, Jung-Hyeon;Park, Jun-Ho;Yoon, Ji-Sook;Seo, Jae-Yong;Pakr, Chan-Hong
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.21 no.3
    • /
    • pp.107-112
    • /
    • 2020
  • With the importance of creative learning highly valued, the demand for education in early childhood and adolescence has been increasing in recent years, but simple memorization-oriented and classical teaching methods tend not to prove high effectiveness in terms of learner-centeredness. Students who study static at their desks for a long time do not prefer boring classical learning methods, and there is also a lack of educational methods and educational content that conforms to the convergence education trend in the actual educational field. Therefore, this study has created a system that allows students to exercise and learn at the same time through a fun and familiar approach, and implement educational content through activation of brain plasticity.

Recent Research Trends for Green Building Thermal Insulation Materials (친환경 건축물 단열재 최근 연구 동향)

  • Park, Jong-Moon;Kim, Dong-Hwan;Suh, Dong-Jin
    • Clean Technology
    • /
    • v.18 no.1
    • /
    • pp.14-21
    • /
    • 2012
  • The pros and cons of green building thermal insulation materials and systems have been reviewed from traditional thermal insulation materials such as mineral wool and polyurethane to new thermal insulation materials like VIP and aerogel and future insulating VIM and DIM. VIPs and aerogels with very low thermal conductivity can use for green buildings to significantly increase residential area by reducing energy consumption. Aerogels can be produced as not only opaque and but also translucent forms, thus enabling a wide range of possible building application. For building applications, there are many properties to consider like building site adaptability and mechanical strength, fire protection, cost and environmental impact.

Characteristics of Capacitive Deionization Process using Carbon Aerogel Composite Electrodes (탄소에어로젤 복합전극의 전기용량적 탈이온 공정 특성)

  • Lee, Gi-Taek;Cho, Won-Il;Cho, Byung-Won
    • Journal of the Korean Electrochemical Society
    • /
    • v.8 no.2
    • /
    • pp.77-81
    • /
    • 2005
  • Porous-composite electrodes have been developed using silica gel, which reduce carbon aerogel usage with high cost. Silica gel powder was added to the carbon aerogel to simplify the manufacturing procedure and to increase the wet-ability, the mechanical strength and the CDI efficiency. Porous composite electrodes composed of carbon aerogel and silica gel powder were prepared by paste rolling method. Carbon aerosol composite electrodes with $10\times10cm^2$ are placed face to face between spacers, and assembled the four-stage series cells for CDI process. Each stage is composed of 45 cells. Four-stage series cells (flow through cells) for CDI process are put in continuous-system reactor containing 1,000ml-NaCl solution bath of 1,000 ppm. The four-stage series cells with carbon aerogel electrodes are charged at 1.2V and are discharged at 0.001V, and then read the current. Conclusively, removal efficiencies of ions using the four-stage series cells composed of carbon aerogel composite electrodes show good removal efficiency of $99\%$ respectively.

In situ iron/manganese removal and permeability improvement at the river bank filtration site (강변여과수내 철망간 저감 및 투수성 개선)

  • Kim, Byung-Woo;Kim, Byung-Goon;Hur, Young-Teck;Kim, Dong-Sup;Kim, Hong-Suck
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2018.05a
    • /
    • pp.228-228
    • /
    • 2018
  • 강변여과는 지하수 인공함양 방식 중 유도함양(induced recharge) 또는 간접함양 방식에 속한다. 이는 하천 및 강변 부근에 집수시설을 설치한 후, 미고결층 대수층(unconsolidated aquifer)의 자연 오염 저감능을 이용하여 지표수를 간접 취수하는 방식으로 수질이 불량한 지표수가 대수층을 관류하면서 희석, 화학적 이온 교환 및 반응, 흡착, 생물막(biofilm; 미생물에 의한 자연저감), 여과 등을 통하여 수질이 개선된다. 강변여과수내의 용존 농도가 높은 철과 망간은 수처리 비용증가, 용수관정 및 시설물의 수명단축을 초래한다. 따라서 강변여과 지역의 미고결 대수층에서 효과적인 철과 망간 동시 제거(vyredox)를 위해 에어서징(air surging)과 블록 서징(block surging)을 실시하기 위해서 실내 물탱크 모델(water tank model)에서 에어서징에 따른 공기 순환 우물시스템을 관찰하였으며, 이를 바탕으로 현장시험(Test bed)에 적용하였다. 미고결 대층수층에서의 철 망간은 음용수 기준치(각각 0.3 mg/L)를 초과하고 있으며, 강변여과 취수 개발 및 이용을 제한하는 요인이 되고 있다. 본 연구에서 사용된 에어서징과 블록서지 기술은 자갈층 및 미고결 대수층에 충진된 슬라임 및 폐색(clogging)을 제거함과 동시에 관정 주변의 대수층의 투수성 개선과 산화환경으로 치환되며, 대수층에 잔존하는 철/망간의 산화물들을 관정내로 빼낼 수 있는 방법이다. 따라서 서징에 따른 폐색 제거효율을 검토한 결과에서 철 망간 이온농도 저감효과와 관정 주변의 수리전도도(hydraulic conductivity) 및 저류계수(coefficient of storage)가 증가한 것으로 나타났다. 이와 같이 강변여과에 의한 폐색은 미고결층내 공기주입 및 블록서지를 통하여 철/망간 이온농도 저감 및 수리특성 개선 효과에 유용한 것으로 평가된다.

  • PDF

A new method for determining OBS positions for crustal structure studies, using airgun shots and precise bathymetric data (지각구조 연구에서 에어건 발파와 정밀 수심 자료를 이용한 OBS 위치 결정의 새로운 방법)

  • Oshida, Atsushi;Kubota, Ryuji;Nishiyama, Eiichiro;Ando, Jun;Kasahara, Junzo;Nishizawa, Azusa;Kaneda, Kentaro
    • Geophysics and Geophysical Exploration
    • /
    • v.11 no.1
    • /
    • pp.15-25
    • /
    • 2008
  • Ocean-bottom seismometer (OBS) positions are one of the key parameters in an OBS-airgun seismic survey for crustal structure study. To improve the quality of these parameters, we have developed a new method of determining OBS positions, using airgun shot data and bathymetric data in addition to available distance measurements by acoustic transponders. The traveltimes of direct water waves emitted by airgun shots and recorded by OBSs are used as important information for determining OBS locations, in cases where there are few acoustic transponder data (<3 sites). The new method consists of two steps. A global search is performed as the first step, to find nodes of the bathymetric grid that are the closest to explaining the observed direct water-wave traveltimes from airgun shots, and acoustic ranging using a transponder system. The use of precise 2D bathymetric data is most important if the bottom topography near the OBS is extremely rough. The locations of the nodes obtained by the first step are used as initial values for the second step, to avoid falling into local convergence minima. In the second step, a non-linear inverse method is executed. If the OBS internal clock shows large drift, a secondary correction for the OBS internal clock is obtained, as well as the OBS location, as final results by this method. We discuss the error and the influence of each measurement used in the determination of OBS location.