• Title/Summary/Keyword: 철도 모니터링

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Hybrid Monitoring using Wireless Sensor Nodes of Steel Plate-Girder Railroad Bridges (무선센서노드를 이용한 강판형 철도교량의 하이브리드 모니터링)

  • Hong, Dong-Soo;Park, Jae-Hyung;Kim, Jeong-Tae
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2009.04a
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    • pp.110-113
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    • 2009
  • 본 연구에서는 무선센서노드을 이용하여 강판형 철도교량의 전형적인 손상유형인 거더부의 휨강성 저하와 지점부의 볼트풀림을 효과적으로 모니터링할 수 있는 하이브리드 모니터링 기법을 제안하였다. 이를 위해 다음과 같은 연구가 수행되었다. 첫째, 본 연구진에 의해 개발된 가속도 및 임피던스기반 무선센서노드를 간략하게 소개하였다. 둘째, 가속도 및 임피던스 신호를 이용하여 효과적인 손상모니터링이 가능한 기법들을 선정하였다. 마지막으로, 개발된 가속도 및 임피던스기반 무선센서노드를 모형 강판형 철도교에 설치하고, 일련의 손상 시나리오에 따른 하이브리드 모니터링을 수행하여 무선센서노드 및 모니터링 기법의 성능을 평가하였다.

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철도교량의 구조건전성 모니터링 시스템 개발

  • Yun, Jeong-Bang;Park, Hyeon-Jun
    • Magazine of the Korean Society of Hazard Mitigation
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    • v.11 no.1
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    • pp.95-98
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    • 2011
  • 최근 국내에서 사회기반시설물에 대한 안전관리 네트워크 통합시스템 구축을 위한 국가핵심과제가 진행되고 있다. 본 연구에서는, 위 과제의 일환으로 진행 중인 철도교량의 구조건전성 모니터링 시스템 구축 및 운용에 대하여 기술하였다. 효율적인 철도교량 모니터링 시스템 구축을 위하여 다양한 종류의 스마트센서가 적용되었으며, 웹 기반의 네트워킹을 통해 외부에서 모니터링 시스템을 원격으로 접속, 제어 할 수 있도록 하였다. 철도교량의 국부 손상을 모니터링 하기 위해 압전센서를 활용한 무선 임피던스 노드를 적용하였고, 구조물 전체의 거동 분석을 위하여 가속도 센서 및 광섬유 센서를 적용하였다. 구조물의 장기 계측을 통한 철도 주행 및 외부 환경에 따른 거동 분석을 수행하였으며, 손상 평가를 위한 신호처리 알고리즘이 적용되었다.

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A study on Land use Survey and Monitoring Forcused on the Subway Station Areas in Taejeon (도시철도 역세권의 공간이용 모니터링을 위한 기초연구)

  • Cho, Byung-Ho;Choi, Bong-Moon
    • The Journal of the Korea Contents Association
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    • v.11 no.2
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    • pp.457-465
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    • 2011
  • This research, which was started with a need for constant monitoring to find out urban societies and spacial effects by urban railway after the opening, was intended to empirically explore urban and social changes by the opening of Daejeon City metro line 1st which would greatly affect the spacial structure of the city. For this goal, we expected the effect of urban subway on the city with academic consideration and precedent study. Monitoring results of the subway station areas of Daejeon City metro line 1st showed the opening of urban railway had an influence on the flow of urban plan and urban space structure through population, land use, total-developing areas, and land price change. In other words, as urban railway opens the number of population and population activities centered on the subway station areas, and these movements led to the expansion of the commercial areas. Finally, they caused the average land prices to rise. Likewise, urban monitering is significantly useful comprehending the generally time-periodic changes of cities and even conceiving the present cities.

The implementation of the PC-based monitoring device for railway temperature environmental (PC기반의 철도 온도환경에 적합한 모니터링 장치 구현)

  • Bea, Goe-Sung;Son, Ki-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.7
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    • pp.819-825
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    • 2014
  • The diurnal range of temperature in korea is increasing. We know that the environment has deteriorated through report about railway damage and economic loss caused by climate. In these conditions, Monitoring device for railway must operate to support the operations and maintenance. Therefore, In this paper, COM-based monitoring device implemented using Industrial-Extended electronic components and made, We tested compliance about temperature environment of actual railway. We verified through testing about cold and dry heat of monitoring device. Used components in this product will be able to utilize the development of the railway industry of electronics.

Application of Low Cost Acceleration-based Wireless Sensor Node for Structural Health Monitoring of Railroad Bridges (철도교량의 구조건전성모니터링을 위한 저가형 가속도기반 무선센서노드의 활용)

  • Hong, Dong-Soo;Ho, Duc-Duy;Park, Jae-Hyung;Kim, Jeong-Tae
    • 한국방재학회:학술대회논문집
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    • 2010.02a
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    • pp.77.1-77.1
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    • 2010
  • 본 연구에서는 가속도기반 무선센서노드와 MEMS 가속도계 센서를 이용하여 철도교량의 구조건전성모니터링 기법들의 성능을 검토하였다. 이를 위해 다음과 같은 세 단계의 연구가 수행되었다. 첫째, 저가형 가속도기반 무선센서노드를 설계하였다. 둘째, 철도교량의 구조건전성모니터링을 위한 진동특성 및 건전성평가기법을 선정하였다. 마지막으로, 모형 강판형교에 대한 진동실험을 통해 개발된 가속도기반 무선센서노드의 성능을 평가하고 일련의 손상 시나리오를 대상으로 건전성평가 기법의 성능을 검토하였다. 시간영역 기법인 AR 모델과 주파수영역 기법인 파워스펙트럼 상관계수가 강판형교 구조손상 모니터링에 높은 정확도를 보였다.

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Evaluation on the Applicability of Monitoring for Urban Railway Structure Using Brillouin Optical Correlation Domain Analysis Based Distributed Optical Fiber Sensor (브릴루앙 광 상관영역 기반 분포형 광섬유를 활용한 도시철도 구조물의 모니터링 적용성 평가)

  • Chae, Deokho;Lee, Sungjin;Lee, Jin-Wook
    • Journal of the Korean GEO-environmental Society
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    • v.19 no.9
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    • pp.13-19
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    • 2018
  • Recently, there have been various problems aroused on the domestic infrastructures as the domestic cities become old. Accordingly, the national concerns grow on the urban railway and the related structures, which brings the national interests are brought on the research on the maintenance and rehabilitation of the old infrastructures. The underground structure of urban railway are checked with the strain gages or fiber brag grating (FBG) sensors on the railway. However, these methods are known to have resolution limitations on the investigations of the specified abnormal section. Therefore, the applicability of the Brillouin Optical Correlation Domain Analysis (BOCDA) based distributed fiber optic sensor system on the railway was evaluated in this study. The constructed BOCDA fiber optic sensor system shows high resolution of 10, 20, 50, 100 cm and capability of continuous monitoring on overall or specified section within 2 km range. The applicability evaluation was performed on the 250 m distribution of fiber optic sensors abandoned railway for continuous monitoring. The applicability of the system on the specified area was evaluated with wheel load testing. As a result, data loss tends to increase with the reduction of spatial resolution from 1.0 m to 0.1 m. Even though the measuring speed is reduced with lower spatial resolution, data accuracy increases on the location and deformation. The system can be applicable to various structures if the proper distribution method is invented later.

A Feasibility Study on the Energy Harvesting Technology for the Real-Time Monitoring System of Intelligent Railroad Vehicles (철도차량 모니터링 시스템 개발을 위한 자가발전 기술 연구)

  • Kim, Jae-Hoon;Lee, Jae-Youn
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.35 no.9
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    • pp.955-960
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    • 2011
  • This study was aimed at investigating the applicability of energy harvesting technologies, which are regarded as new and renewable energy sources for real-time/wireless monitoring of intelligent railroad vehicles. The surrounding energy generated in a normal operating environment was monitored using a high-speed railroad vehicle in operation. This monitoring was performed in an attempt to evaluate the effectives of energy harvesting and the applicability of energy-harvesting-monitoring technologies under the conditions in which thermal energy and vibration energy are generated.

Infrared Thermographic Monitoring for Failure Characterization in Railway Axle Materials (철도차량 차축 재료의 파괴특성 적외선열화상 모니터링)

  • Kim, Jeong-Guk
    • Journal of the Korean Society for Nondestructive Testing
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    • v.30 no.2
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    • pp.116-120
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    • 2010
  • The wheelset, an assembly of wheel and axle, is one of important parts in railway bogie, directly related with the running safety of railway rolling stock. In this investigation, the tensile failure behavior of railway axle materials was investigated. The tensile coupons were prepared from the actual rolling stock parts, which were operated over 20 years. The tensile testing was performed according to the KS guideline. During tensile testing, an infrared camera was employed to monitor temperature changes in specimen as well as demonstrate temperature contour in terms of infrared thermographic images. The thermographic images of tensile specimens showed comparable results with mechanical behavior of tensile materials. In this paper, the failure mode and behavior of railway axle materials were provided with the aid of infrared thermography technique.

A Study on the Energy Harvesting System for the Health Monitoring of Railroad Vehicle (차량 상태 모니터링을 위한 자가 발전 시스템 연구)

  • Lee, Jae-Yun;Kim, Jae-Hoon;Lee, Kwan-Sup;Oh, Jae-Geun
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.1661-1667
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    • 2011
  • This study was intended to identify the applicability of energy harvesting technologies for powering a wireless health monitoring sensor system of railroad vehicle. As measuring surrounding energy under the normal operation environment, it is possible to predict amount of the applicable energy. The results of energy prediction represents the feasibility of power sources for wireless sensor systems through energy harvesting technologies under the circumstance in which the thermal energy and vibration energy are generated.

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