• Proceedings of the SAREK Conference
• /
• 2008.11a
• /
• pp.75-79
• /
• 2008

Since tunnel construction order was placed one by one, various sensors and actuators installed at the RTU and higher level system in each tunnel maintenance office had their own protocols depending on construction company. The TGMS testbed established on the extended region of Yong-dong Highway, for example, did not have consistent protocol between each automation levels and management levels without considering the functions and/or roles of each level. The management sever in each tunnel was simply networked to the TGMS server. Therefore, it is impossible to implement a new control algorithm as well as to integrate each other since each tunnel was constructed by different company. So, if the construction company is out of business, there is no way to maintain the corresponding tunnel effectively. In order to solve this problem, all the necessary standard protocols was established between automation level and management levels. These interface standards provide the clear classification between individual tunnel system and tunnel management system. So, even if construction company is different, its effect is minimized, so that it is expected to successfully establish PC based TGMS.

• Transactions of the Korean Society for Noise and Vibration Engineering
• /
• v.26 no.6_spc
• /
• pp.644-650
• /
• 2016

Track maintenance works based on track geometry recordings are essential to enhance the safety and comfort of railway transportation. Usually, the track irregularity has been measured by a special inspection trains which all were imported from abroad. Because the inspection train speed is limited under 160 km/h, it takes a long time to inspect railways and there is difficulty in daytime operation. To solve this problem, we started to develop a track geometry measuring system (TGMS) with measurement speed up to 300 km/h which can be installed in commercial vehicles such as HEMU-430X. In this paper, we introduce a newly developed inertial TGMS and propose two inertial navigation system (INS) algorithms (method A, B) for measuring track geometry. In order to investigate advantage and disadvantage of each algorithm, we performed vibration test of the TGMS, which was simulated by 6-axis shaking table. Through the vibration test, we analyzed the influence of vehicle vibration on the TGMS which will be installed on bogie frame. To the vibration test, two methods satisfied the required accuracy of track geometry measurement under the level of the actual vehicle vibration of HEMU-430X train. Theoretically, method A is sensitive to vehicle vibration than method B. However, HEMU-430X's bogie vibration frequency range is out of interest range of measurement system. Therefore, method A can also apply the HEMU-430X train.

• Proceedings of the SAREK Conference
• /
• 2008.11a
• /
• pp.405-409
• /
• 2008

Over 70% of the land is mountains in Korea, so that many roadways naturally includes tunnels. The air flow inside tunnel has complex characteristics, such that a new flow field is formed by following vehicles passing through the tunnel before previous flow field is stabilized. Due to these time delayed-transient characteristics, the ventilation facility requires the complex control algorithm that can handle adaptive and predictive controls. Also, it needs to be closely related to the disaster prevention system. The technology to integrate these system determines the success of TGMS. The pollutant levels exhausted from the vehicles passing through tunnel depend on vehicle years and passing velocity. They also depend on the slope and altitude of the tunnel. In order to solve this problem, an algorithm for estimating the compensating factors for calculating on design capacity of ventilation facilities was developed. Also, an integrated ventilation control algorithm with disaster prevention program to operate several tunnels was developed based on TGMS.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
• /
• v.29 no.2
• /
• pp.55-60
• /
• 2000

최근 고속도로 터널의 TGMS 구축에 따라 요구되는 일반 상황 및 응급상황시 설비 시스템간의 연동제어 방안에 대해 기술하였음.

• Proceedings of the SAREK Conference
• /
• 2006.11a
• /
• pp.104-104
• /
• 2006

• TTA Journal
• /
• s.37
• /
• pp.60-70
• /
• 1995

미래육상이동통신시스템(FPLMTS-Future Public Land Mobile Telecommunication Systems)은 2000년대초 서비스를 목표로 ITU-R에서 권고(안)을 작성하고 있는 제3세대 이동통신시스템(TGMS-Third Generation Mobile System)이다. FPLMTS의 기본목적중의 하나는 이동전화, 코드리스폰, 이동데이터, 위성 등 다양한 시스템을 통합하여 제한된 무선접속을 통해 일체화된 이동통신 서비스를 제공하는 것이다. 또한 FPLMTS는 사용자들로 하여금 어느 나라에서나 통화할 수 있도록 함으로써 이용자들에게 국제로밍을 제공하고, 넓은 지역을 관할하면서 인구가 희박한 지역에도 효과적으로 서비스를 제공할 수 있도록 지상망과 위성망을 연동한다. 본 보고서는 FPLMTS의 권고(안) 작성을 담당하고 있는 ITU-R TG8/1의 국제표준화동향 및 기술동향에 관한 정보를 수집/분석한 내용을 담고 있다. 이 보고서가 국내 이동통신분야, 특히 개인통신서비스 개발의 정확한 방향정립과 연구개발에 도움이 되었으면 한다.