• Proceedings of the KSR Conference
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• 2011.10a
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• pp.1664-1666
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• 2011

오늘날 고성능의 소형 센서 및 무선통신 기술의 발달로 유비쿼터스 컴퓨팅의 실현이 가능하게 되었다. 미래의 스마트한 디바이스뿐만 아니라 무선통신이 가능한 USN(Ubiquito us Sensor network) 기술은 주변 현황을 인식하고 필요한 정보를 처리하여 현장건설 등에 피이드백 시킴으로써 보다 나은 건설 진행과정에 관한 파악과 설계변경 및 계획 등에 필요한 정보를 제공할 수 있다. 본 연구는 TinyOS 기반에서 운용되는 무선 통신에 의한 USN 기술과 그래픽 기반의 LabView 프로그래밍 기술을 융합하여 정보를 처리할 수 있는 일련의 인터페이스 방법을 구현하였다. 송수신된 데이터 처리 결과는 TinyOS 기반으로 동작하는 PC에 그래프 등으로 나타나도록 하였으며, 무선통신용 USN 기술과 융합된 그래픽 처리 기반의 마이크로프로세서 시스템의 장점과 편리성으로 건설현장의 진행과정파악 및 변경 등에 필요한 정보를 제공하며 건설현장 정보의 피이드백을 가능하도록 하였다. 그 결과, 철도건설 현장관리에서의 USN과 구조물의 정밀진단 및 관리에 매우 유용함을 입증하였다.

• Proceedings of the KIEE Conference
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• 2003.10b
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• pp.289-291
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• 2003

Railway takes an important role of transporting massive passenger and freight. Accidents which occur related to trains have a risk of serious loss of lives, so those accidents need to be controlled urgently Therefore moving picture transmission system is required which transmits exact information of moving picture of accident status to CTC and also communication line is also required with it. By using WTB line as a wayside transmission line, railway telephones, fax and train service information are provided to local offices. As transmission line improving project, optical cabling work is being processed by phases. Therefore optical fiber line is more effective way for a communicating way between stations than coaxial transmission line. This Paper considers connecting method when optical fibers is used for moving picture data transmission of train accidents and its problems.

• Proceedings of the KIEE Conference
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• 2001.07b
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• pp.1254-1256
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• 2001

This paper composes the Electric Railway System with the common grounding based on the 5-port network model. We compare the magnification ratio of harmonic currents according to locations of RC bank(i.e s/s. sp, and pp). It takes a lot of costs to equip the RC-bank at all location. And it is NOT effective that RC-bank is equipped at S/S. Finally, this paper proposes SP as the optimal site of RC-bank aspect reducing harmonic.

• Proceedings of the KSR Conference
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• 2003.10b
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• pp.429-435
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• 2003

This paper presents the case studies of Tubular Roof construction Method(T.R.c.M) and Semi Shield method, which were applied to the tunnel excavation under the pre-existing railways. It was proved that T.R.c.M was an effective and safe method for the tunnel excavated in soft soil, giving little damage to the railways located a few meters above. Semi Shield was also performed successfully to bore a tunnel in soft and hard rock, minimizing the ground settlement and tilting of vulnerable fuel tanks. Site and soil conditions are also discussed, which led these relatively new methods to success. Finally, comparison of the measurement results and the design values are made to verify and improve the current design practice.

• Proceedings of the KSR Conference
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• 2003.10a
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• pp.210-215
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• 2003

Korean High Speed Train (KHST) has been tested on high speed line in JungBu site since it was developed in 2002. The KHST figured 7 cars was modeled for dynamic simulation with Vampire program. and the data acquisition system was used to test successfully the on-line test for proving the dynamic performance of KHST. The comparison between test and simulation results for dynamic behavior of KHST was tried in this paper and it was very difficult because the environmental conditions and running conditions have an effect on the test results and these conditions are unable to be modeled for dynamic analysis. Also the parameters for data acquisition system for test are usually not same to simulation conditions. Therefor, in this paper the acceleration data after filtering with low pass filter below 1Hz were used to compare between test and simulation results because the low frequency range is useful to evaluate the dynamic performance for railway vehicle system, so as steady state curving acceleration. The results show that both are similar in low frequency range.

• Proceedings of the KSR Conference
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• 2003.10a
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• pp.156-161
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• 2003

Korean High Speed Train (KHST) has been tested on high speed line in JungBu site since it was developed in 2002. The data acquisition system was used to test successfully the on-line test for proving the dynamic performance of KHST. The recognition of system vibration mode for railway vehicle is essential to understand the characteristics of design for dynamic system and diagnose the dynamic problems of vehicle system during test and operation. But, up to now, there are the efforts to know the system vibration mode within limit of theoretical field only, not experimental approach with systematic method. The theoretical results are too reliable to apply to real design problem, because it is theoretically based on the homogeneous linear system although the real system have the nonlinear characteristics and vary the environmental conditions. Therefor, in this paper, it is proposed the efficient method of vibration analysis for rail vehicle system and this method apply to KHST to recognize the vibration mode characteristics of it. The results show that this method is able to make the system vibration modes for KHST clear.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1691-1693
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• 2007

Establishing the realtime remote monitoring system of the moving test train is the important issue for the railway systems that provide comfort travel to the passengers. But it is not easy to transmit train's test data to remote site because the train runs tunnels. In this paper, we introduce the realtime monitoring system using wireless communication system which is installed in the test train. This system can provide both correct positions of unstable track and train's running status such as speed, kilopost and acceleration.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1590-1593
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• 2007

Establishing the remote monitoring system of the moving test train is the important issue for the railway systems that provide comfort travel to the passengers. But it is not easy to transmit train's test data to remote site because the train runs tunnels. This paper represent the development results of Hanvit 350 remote monitoring system using wireless data communication system which is installed in the test train. This system can provide both correct positions of unstable track and train's running status such as speed, kilopost and acceleration.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.10-14
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• 2009

최근 건설 사업에서는 다양한 형태의 전산화 도구들을 현장에 적용하기 위한 노력이 진행 되고 있다. 그러나 철도시설과 같은 광역지역을 효율적으로 관리하기 위해서는 VR (Virtual Reality, 가상현실) 기술을 활용한 원격기반의 정보화 기법이 도입될 필요가 있다. 이를 위 본 연구에서는 VR과 Telepresence 기술을 통합한 실시간 현장 원격관리체계 구축 및 AR (Augmented Reality, 증강현실) 연동 방법론을 제안하며, 제시된 방법론의 실무 적용 성을 검토하고 있다. 이러한 가상건설지원 체계는 건설실무자와 시스템간의 실시간 상호작용을 가능하게 하며, 통합된 현장 진도 상황정보를 효율적으로 파악 할 수 있는 도구가 될 수 있을 것으로 기대된다.

• Proceedings of the KIEE Conference
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• 1997.07a
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• pp.349-351
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• 1997

In modern train systems, the high-speed and the high-density of train operation have been required. Effective train control systems need various information interchanged between the ground-site and on-board devices. So the systems are essential to the digital systems to admit lots of information and to raise the accuracy of transmission. In this paper, it is dealt with a transmission of digital information between on-board and ground. Especially, this paper shows the experiment of data transmission and realize the system for information transmission in railway system.