• Title/Summary/Keyword: Monitoring System in Tunnel

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Cable Tunnel Monitoring System by Wireless Sensor Network (무선센서 네트워크에 의한 지하 통신구 터널 모니터링 연구)

  • Kim, Hyung-Woo;Moon, Tae-Gyun
    • 한국방재학회:학술대회논문집
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    • 2008.02a
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    • pp.549-552
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    • 2008
  • In this study, we deployed the cable tunnel inspection and monitoring system by wireless sensor network. It is shown that the wireless sensor network which is composed of sensor, wireless communication module, and gateway can be applied to cable tunnel monitoring system. Sensors considered herein are flame detection sensor, flood detection sensor, intruder detection sensor, and temperature sensor, etc. It is also found that the wireless sensor network can deliver sensing data reliably by wireless sensing technology. The gateway system that can transmit sensed data to server by CDMA is developed. Monitoring system is constructed by web service technology, and it is observed that this system can monitor the present state of tunnel without difficulties. The system provides an alternative to inspecting and monitoring the tunnel efficiently where the conventional wired system is infeasible.

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Cable tunnel monitoring system by wireless sensor network (무선센서 네트워크에 의한 통신구 모니터링 시스템 개발)

  • Kim, Hyung-Woo
    • 한국정보통신설비학회:학술대회논문집
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    • 2007.08a
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    • pp.176-180
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    • 2007
  • In this study, we deployed the cable tunnel inspection and monitoring system by wireless sensor network. It is shown that the wireless sensor network which is composed of sensor, wireless communication module, and gateway can be applied to cable tunnel monitoring system. Sensors considered herein are flame detection sensor, flood detection sensor, intruder detection sensor, and temperature sensor, etc. It is also found that the wireless sensor network can deliver sensing data reliably by wireless sensing technology. The gateway system that can transmit sensed data to server by CDMA is developed. Monitoring system is constructed by web service technology, and it is observed that this system can monitor the present state of tunnel without difficulties. The system provides an alternative to inspect and monitor the tunnel efficiently where the conventional wired system is infeasible.

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Tunnel Inspection and Monitoring System by Wireless Sensor Network (무선센서네트워크를 이용한 터널 모니터링 시스템)

  • Kim Hyung-Woo;Han Jin-Woo
    • 한국정보통신설비학회:학술대회논문집
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    • 2006.08a
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    • pp.91-94
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    • 2006
  • In this paper, we deployed the tunnel inspection and monitoring system by wireless sensor network. It is shown that the wireless sensor network which is composed of sensor, wireless communication module, and gateway system can be applied to tunnel monitoring system. Sensors included herein are acceleration transducers, fire-alarm sensors, water-level sensors, and magnetic contact sensors. It is also found that the wireless sensor network can deliver sensing data reliably by ad-hoc networking technology. The gateway system that can send the sensing data to server by CDMA (code division multiple access) is developed. Finally, monitoring system is constructed by web service technology, and it is observed that this system can monitor the present state of tunnel without difficulties. Furthermore, the above system provides an alternative to inspect and monitor the tunnel efficiently where the conventional wired system cannot be applied.

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Analysis for the Problem and Improvement of Maintenance Monitoring in Subway Tunnel (지하철 터널에서 유지관리계측의 문제점 분석 및 개선방안)

  • Woo, Jong-Tae;Kim, Jong-Soo;Lee, Song
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.5 no.4
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    • pp.161-167
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    • 2001
  • By means of analyzing the problems in monitoring plan, design, installation, operation based on maintenance monitoring system installed in subway tunnel section, the improved methods of were proposed for applying to subway monitoring maintenance effectively in the future. The choice of the better monitoring system, the operating method of monitoring system, the confidence and continuity of maintenance monitoring, the performance of responsible monitoring supervision in the phase of the planning of monitoring and design were proposed. The problem and developed plan in the different monitoring systems, the calibration and correction of monitoring system, the analysis for the results and plan for maintenance in the phase of installation of monitoring system and operation were also proposed.

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Real-time condition assessment of railway tunnel deformation using an FBG-based monitoring system

  • Zhou, Lu;Zhang, Chao;Ni, Yi-Qing;Wang, Chung-Yue
    • Smart Structures and Systems
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    • v.21 no.5
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    • pp.537-548
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    • 2018
  • A tunnel deformation monitoring system is developed with the use of fiber Bragg grating (FBG) sensing technique, aiming at providing continuous monitoring of railway tunnel deformation in the long term, and early warning for the rail service maintainers and authorities to avoid catastrophic consequences when significant deformation occurs. Specifically, a set of FBG bending gauges with the ability of angle measurement and temperature compensation is designed and manufactured for the purpose of online monitoring of tunnel deformation. An overall profile of lateral tunnel displacement along the longitudinal direction can be obtained by implementing an array of the FBG bending gauges interconnected by rigid rods, in conjunction with a proper algorithm. The devised system is verified in laboratory experiments with a test setup enabling to imitate various patterns of tunnel deformation before the implementation of this system in an in-service high-speed railway (HSR) tunnel.

Development of Tunnel-Environment Monitoring System and Its Installation II -Measurement in Gumjung Tunnel- (터널 환경 측정 시스템 개발 및 측정 II -금정터널 측정결과 분석-)

  • Park, Won-Hee;Cho, Youngmin
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.4
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    • pp.758-765
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    • 2016
  • This paper is a follow-up paper to the publication, "Development of Tunnel-Environment Monitoring System and Its Installation I - Monitoring System and Measurement in Subway Tunnel" [1]. An environment monitoring system was installed in the 20.3-km-long Gumjung tunnel, which has the general structure of a high-speed double-track railway tunnel. Data were collected for approximately one year. Monthly and daily data were obtained and analyzed for the temperature and relative humidity in summer and winter months. This paper discusses the environmental characteristics at different positions in the tunnel. The results are expected to be widely used in studies on tunnel ventilation and the improvement of air quality and thermal environments.

Noncontact techniques for monitoring of tunnel linings

  • White, Joshua;Hurlebaus, Stefan;Shokouhi, Parisa;Wittwer, Andreas;Wimsatt, Andrew
    • Structural Monitoring and Maintenance
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    • v.1 no.2
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    • pp.197-211
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    • 2014
  • An investigation of tunnel linings is performed at two tunnels in the US using complimentary noncontact techniques: air-coupled ground penetrating radar (GPR), and a vehicle-mounted scanning system (SPACETEC) that combines laser, visual, and infrared thermography scanning methods. This paper shows that a combination of such techniques can maximize inspection coverage in a comprehensive and efficient manner. Since ground-truth is typically not available in public tunnel field evaluations, the noncontact techniques used are compared with two reliable in-depth contact nondestructive testing methods: ground-coupled GPR and ultrasonic tomography. The noncontact techniques are used to identify and locate the reinforcement mesh, structural steel ribs, internal layer interfaces, shallow delamination, and tile debonding. It is shown that this combination of methods can be used synergistically to provide tunnel owners with a comprehensive and efficient approach for monitoring tunnel lining conditions.

Implement of Dynamic Performance Measurement System Between Pantograph and Contact wire in Tunnel (터널구간 팬터그래프와 전차선간 동적성능 검측장치 구현)

  • Park, Young;Park, Chul-Min;Lee, Ki-Won;Kwon, Sam-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.11
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    • pp.1732-1736
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    • 2012
  • To increase speed up of train, in the field of catenary system, it is necessary to develop of new monitoring methods for dynamic interaction between pantograph and contact wire. Also, there is a need to develop technologies that constantly measure are from various railway structure such as uplift of contact wire, vibration of catenary, dynamic strain of contact line in tunnel. In this paper condition monitoring systems for dynamic performance of catenary systems in tunnel were proposed. An advanced method and results of field tests using high speed camera for monitoring of vertical upward movement of the grooved contact wire due to the force produced from the pantograph were presented. The proposed uplift measurement system of contact wire is expected to enhance precision of current collection quality performance assessment methods at high-speed lines.

Development of Safety Monitoring System for Operating Railway Tunnel (운용중인 철도터널의 안전관리 시스템 시범구축)

  • Lee, Su-Hyung;Shin, Min-Ho;Kim, Hyun-Ki
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.73-78
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    • 2008
  • There has been need for safety monitoring systems for the social infrastructures. These infrastructures are subject to degradation over time, reduced functionality, and loss of functionality as a result of factors such as a wide variety of installation environments, natural disasters, and nearby work. Therefore, it is necessary to perform appropriate inspections, repairs, and renovations to ensure safe and efficient maintenance and operation. This paper introduces the example of the development of the safety monitoring system for operating railway tunnel. Tunnel profile measuring system using laser beam, crack gauges, accelerometer and a pluviometer were implemented to monitor the safety of a deteriorated tunnel. The measured data were transferred through wireless network and analyzed in real time. The safety criteria for tunnel stabilities and train operations are also discussed.

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Development of Tunnel-Environment Monitoring System and Its Installation I -Monitoring System and Measurement in Subway Tunnel- (터널 환경측정 시스템 개발 및 측정 I -개발 시스템 및 지하철터널 측정-)

  • Park, Won-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.12
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    • pp.8608-8615
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    • 2015
  • We developed a system that can collect and transmit real-time environmental data such as temperature, humidity, wind direction, and wind speed, and equipment performing aging tests on fire detectors. This system was installed in three representative sites of railway tunnels in South Korea such as Gumjung, Solan, Seoul Subway Line 4 tunnels. The systems showed a stable performance and collected environmental data for over a year. We analyzed environmental data collected by two of our developed systems installed in the running tunnels of Gwacheon Line of Seoul Subway Line 4. The developed system was capable of safely analyzing tunnel environments for 24 h straight using a wireless communication network, and has potential for use in a variety of fields other than tunnels.