• Title/Summary/Keyword: Screen door

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The Effect of Platform Screen Doors on PM10 Levels in a Subway Station and a Trial to Reduce PM10 in Tunnels

  • Son, Youn-Suk;Salama, Amgad;Jeong, Hye-Seon;Kim, Suhyang;Jeong, Jin-Ho;Lee, Jaihyo;SunWoo, Young;Kim, Jo-Chun
    • Asian Journal of Atmospheric Environment
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    • v.7 no.1
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    • pp.38-47
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    • 2013
  • $PM_{10}$ concentrations were measured at four monitoring sites at the Daechaung station of the Seoul subway. The four locations included two tunnels, a platform, and a waiting room. The outside site of the subway was also monitored for comparison purposes. In addition, the effect of the platform screen doors (PSDs) recently installed to isolate the $PM_{10}$ in a platform from a tunnel were evaluated, and a comparison between $PM_{10}$ levels during rush and non-rush hours was performed. It was observed that $PM_{10}$ levels in the tunnels were generally higher than those in the other locations. This might be associated with the generation of $PM_{10}$ within the tunnel due to the train braking and wear of the subway lines with the motion of the trains, which promotes the mixing and suspension of particulate matter. During this tunnel study, it was observed that the particle size of $PM_{10}$ ranged from 1.8 to 5.6 ${\mu}m$. It was revealed that the $PM_{10}$ levels in the tunnels were significantly increased by the PSDs, while those in the platform and waiting room decreased. As a result, in order to estimate the effect of ventilation system on $PM_{10}$ levels in the tunnels, fans with inverters were operated. It was found that the concentration of $PM_{10}$ was below 150 ${\mu}g/m^3$ when the air flow rate into a tunnel was approximately 210,000-216,000 CMH.

A Case Study on the Application of RCM to Railway System (철도분야 최적유지보수(RCM) 시스템 구축에 관한 연구)

  • Han, Kee-Youl
    • Journal of Applied Reliability
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    • v.15 no.4
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    • pp.276-281
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    • 2015
  • Purpose : The purpose of this study is to propose that domestic rail must the work to be done in the RCM system and railway operators are to present a direction to establish the efficient and systematic system based on this. Methods : In recent years, domestic railway accidents has decreased year rapidly every year. In particular, suicidal ideation was greater than 50% of the accidents is showing a larger decrease in the influence of the screen-door construction. However, the train delay has been maintained without major changes since 2010. The most important cause of the delay operation is a vehicle breakdown. This fact demonstrates that effective maintenance of the most important activities in the railway accident prevention activities. So we have to build a RCM system in which the characteristics of the domestic railway accident. Conclusion : We proposed what is necessary functionality and the function requires a railway operators in RCM railway systeml.

A study for risk analysis and disater prevention of the passengers when traincar fire on PSD Installed subway (지하철 승강장안전문 설치에 따른 열차 화재시 승객 위험성평가와 방재방안 연구)

  • Hwang, Cheol-Seung;Kim, Dong-Sung;Lee, Sang-Gon;Cho, Won-Cheol;Lee, Tae-Shik
    • 한국방재학회:학술대회논문집
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    • 2007.02a
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    • pp.555-560
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    • 2007
  • This paper focused on the ways of disater prevention and risk analysis of the passengers setting up the hypothesis when urban rapid transit broke out fire in subway tunnel which is PSD(Platform Screen Door) installed environment. compared the flud dynamic changes and evacuation specifications whether PSD being installed or not, tried to search the effective ways for sustaining passengers safety.

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Navigation Control for a Mobile Robot using a Camera (카메라를 이용한 이동 로봇 주행 제어)

  • Moon, Soon-Hwan;Han, Min-Hong
    • Journal of Korean Institute of Industrial Engineers
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    • v.22 no.2
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    • pp.165-177
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    • 1996
  • This paper presents a navigation method for a mobile robot which can follow a path drawn on a monitor screen. The current position and heading direction of the mobile robot are obtained using a single camera from a single image of the guide mark projected on a convex mirror. This proposed method eliminates the need to rotate or tilt the camera to track the guide mark, because the convex mirror and a stationary camera provide a panoramic view of the surrounding area. As guide marks, fluorescent lamps on the ceiling, door frames, or any other natural line segment can be used without adding any artificial elements to them.

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System and method for accurate train stop in manual operation mode (수동운전 모드에서 정위치 정차 방법 및 연동 시스템)

  • Son Young-Jin;Ahn Cheong-Mo;Jeong Dong-Yoon;Park Byoung-No
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.1504-1506
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    • 2004
  • The platform screen door(PSD) hasn't been installed yet within the manual operation system, that is, ATS & ATC Signal system. In other countries, it is mostly installed and operated within automatic operation system, that is, ATO. Especially, as a part of the environment friendly system installation, the installation of PSD shall be considered aggressively to improve the air quality in the underground area and to maintain the air-conditioning. Besides the number of suicides in the subway station gets increased these days causing safety hazard, so the installation of PSD is positively reviewed. To install PSD in the manual operation system, it is important to stop the train at the correct position. So we would like to suggest the technical system thereby.

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Air Quality Analysis of Subway Station Line Number 2 Using Mobile Environmental Sensor Modules (모바일 환경센서 모듈을 이용한 지하철 2호선의 공기질 분석)

  • Na, Hyeong-Uk;Kim, Chang-Hoon;Kim, Gyu-Sik;Kim, Hie-Sik;Kim, Jo-Chun
    • Proceedings of the IEEK Conference
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    • 2009.05a
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    • pp.354-356
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    • 2009
  • Air quality analysis is done for subway trains and subway platforms of subway line number 2 using mobile environmental sensor modules. $CO_2$ and PM10/PM2.5 particulate concentration are investigated for screen door systems, under-ground platforms, and transfer stations. These results would help to increase the quality of life of subway railroad passengers.

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Navigation control for a mobile robot using a camera (카메라를 이용한 이동 로보트 주행 제어)

  • 문순환;한민홍
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1994.04a
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    • pp.42-48
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    • 1994
  • This paper presents the navigation method for a mobile robot which uses a single camera and fluorescent lamp as a guide mark, projected on a convex mirror. The current position and heading direction of the mobile robot are obtained from the image of the guide mark. While the mobile robot travels to a goal position, the current position and heading direction of the mobile robot are updated continuously and the desired path and actual moving path are displayed on the monitor screen in real time. This proposed method eliminates the need to rotate the camera to track the guide mark, since a panoramic view of the surrounding area is available from the convex mirror, and natural guide marks such as usual florescent lamp on the ceiling or door frame can be used for navigation.

Study on the annoyance response of subway station noise using jury evaluation test (청감실험을 통한 도시철도 승강장 소음의 성가심 반응에 대한 연구)

  • Kim, Dong-Jun;Kim, Deuk-Sung;Son, Jin-Hee;Chang, Seo-Il
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2009.04a
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    • pp.670-677
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    • 2009
  • The purpose of this study is to reveal the quantitative dose-response relationship between the noise emitted in the platform of subway station and the public response. The noise measured in the platform of subway station was used for a jury test. In order to find the factors which influence annoyance response due to the platform noise, jurors were examined for the difference of the annoying response, interrelation of sound quality parameter and annoyance response. The platform noise level was 77.2$\sim$83.9 dBA and the most of passengers at the platform were highly annoyed. And screen door contributes to annoyance reduction of platform noise. The results from analyzing sound quality parameters shows that loudness and annoyance response have a high correlation coefficient.

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A study of improvement of uncertainty by repeated measurement for PSD(Platform Screen Door) Performance Test (승강장 스크린 도어 시스템 특성 시험의 반복 측정에 의한 불확도 개선 고찰)

  • Ohn, Jung-Ghun;Kim, Myung-Yong;Yun, Myung-Sang;Kim, Won-Kyong;Won, Si-Tae
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1671-1674
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    • 2007
  • A PSD system has a lot of characteristic for safety. Trust of performance test is very important. But PSD performance test has an effect on trust by proficiency of test staff because it is difficult to automate. In that specially the effort test, manual opening and shutting test and abrasion measurement, test staff is demanded for proficiency. Therefore the paper repeated measurement in same condition and studied proficient factor of examiner according to increased measurement counter. As a result, measurement uncertainty has improved.

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Development of Air Quality Assessment Model for Subway Cabin (도시철도 객실 공기질 평가모델 개발)

  • Kwon, Soon-Bark;Cho, Young-Min;Park, Duck-Shin;Kim, Se-Young;Park, Jae-Hyung;Cho, Goan-Hyun;Yoo, Gun-Jong;Kim, Jung-Su
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.157-160
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    • 2010
  • Management of indoor air quality of underground subway station is an important issue since the limited natural ventilation, limited sunshine incoming, and highly moistured atmosphere. The improvement in IAQ of platform is expected because most stations were installed with platform screen door currently, however, the poor air quality in tunnel might be affecting subway cabin indoor. In this study, we developed the air quality assessment model based on computational fluid dynamics. The geometry of air ventilation unit, seat, LCD monitors, and passengers were modeled using commercial software (Design Modeler) and fluid pattern and pollutants trajectories were analyzed by using CFX. We predicted the thermal comfort by predicted mean vote (PMV), distribution of CO2 and PM10 concentration. It is expected that this model can be used for the performance test of air cleaners which are under development.

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