• Journal of the Korean Society of Safety
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• v.24 no.2
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• pp.1-6
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• 2009

A flow analysis for the erosion-corrosion damaged automotive water pump which causes vehicle fire is numerically performed using the CFX program, computational fluid dynamics (CFD) code. The blade bending deformation and the blade clearance enlargement are considered in the analysis of performance reduction. For the cavitation analysis, the homogeneous multi phase model is adopted using the Ralyleigh-Plesset model for the rate equation controlling vapor generation and condensation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.95-95
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• 2004

철도차량용 주행장치인 대차는 차체의 하중을 지지하고, 승객 및 차량의 안전, 주행성능 및 승차감에 지대한 영향을 미치는 핵심 구조부품이다. 주행장치는 크게 대차틀, 차륜 및 차축, 1차 2차 현가장치, 제동장치, 전동기 및 동력전달장치 등으로 구성되며, 대차틀은 형상이 복잡하고 하중을 직접 지지할 뿐만 아니라 하중조건도 정적 및 동적하중이 복합적으로 작용하고 있다. 대차틀은 차체 자중 및 승객 하중에 의한 정하중과 곡선주행, 제동시 발생하는 하중 및 불규칙한 선로와 차체, 주행장치, 윤축의 운동모드에 의한 동하중을 받고 있다.(중략)

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.614-617
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• 2010

본 논문에서는 충돌하중 하에서 스페이스 프레임을 사용하는 경주용 차량의 프레임에 작용하는 응력을 분석한다. 충돌 시 운전자의 안전을 확보하고 변형을 최소한으로 줄이며, 최적화 설계를 통하여 중량을 감소시키고 취약부분을 파악한다. 탄소강의 물성치를 바탕으로 트러스 구조로 설계된 차량 프레임의 유한요소모델을 만들고, ANSYS 프로그램을 사용하여 정면, 측면, 후면 방향의 충돌로 인하여 프레임에 작용하는 응력을 해석한다. 정면 및 후면충돌에서는 운전석에 가해지는 영향이 적지만, 측면충돌에서는 영향을 많이 받아 가장 취약한 부분이다. 이러한 취약부분의 보강을 통하여 프레임의 안전성 설계를 증진시키고 시뮬레이션 해석의 결과를 실제 프레임 제작에 활용한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.577-578
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• 2016

This paper presents a method of vehicle safety system using a pulse sensor which will be able to occurs drowsy driving accident when people driving. The proposed vehicle safety system alarms according to the driver drowsy condition, therefore the driver prevent the direct and $2^{nd}$ accident beforehand cognitive unexpected and dangerous accident using vehicle safety system.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.3-6
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• 2013

최근 차량용 블랙박스의 저장된 데이터의 안전성에 대한 관심도가 높아지고 있다. 현재의 차량용 블랙박스는 영상녹화 및 저장을 위해 보통 플래시 메모리를 삽입하여 사용하는데 이는 메모리의 분실 또는 데이터 파손 등 데이터 보관성에 문제를 일으킬 수 있다. 본 논문에서는 기존의 차량용 블랙박스의 데이터 안전성을 높이고자 클라우드 컴퓨팅 개념을 도입하여 사고발생 시 중요한 데이터를 서버에 최대한 업로드하고 이를 이용해 제 3자에게 영상 데이터를 제공하거나 사고를 통보 할 수 있는 기능을 가진 블랙박스 시스템을 안드로이드 OS에서 구현하고자 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.581-582
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• 2020

본 논문에서는 블루투스 비콘을 활용하여, 학생의 통학차량에서 일어날 수 있는 사고를 미연에 방지하며, 실시간 안전을 확인 할 수 있는 서비스를 블루투스, 스마트폰 응용 서비스 플랫폼, 안드로이드 애플리케이션 등을 활용하여서 기존에 문제점을 보완하는 것과 함께 안전성을 강조하기 위해 블루투스 비콘를 활용한 생활밀착형 ICT 서비스 설계 및 구현을 제안 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1125-1126
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• 2023

자동차 산업 기술이 빠른 속도로 발전되고 E/E(Electrical/Electronic) 시스템의 기능 안전 메커니즘이 중요시되고 있다. Renesas 사(社)의 차량용 MCU 와 차량용 네트워크인 CAN(Controller Area Network)과 Ethernet 을 사용하여 통신이 끊기거나 Noise 가 발생해도 정상동작이 가능하도록 하는 Fail-Operational 알고리즘을 구현하였다. 이 연구를 통해 현재 기능 안전의 중요도가 높아지고 있는 자동차 기술 시장의 수요를 맞출 수 있을 것으로 기대한다.

• Journal of Korean Society of Transportation
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• v.25 no.2 s.95
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• pp.17-26
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• 2007

Because the prime objective of the current preemption methods at signalized intersections near highway-railroad grade crossings(IHRGCs) is to clear the crossing, secondary objectives such as safe pedestrian crossing time and minimized delay often are given less consideration or are ignored completely during the preemption. Under certain circumstances state-of-the-practice traffic signal preemption strategies may cause serious pedestrian safety and efficiency problems at IHRGCs. An improved transition preemption strategy(ITPS) that is specifically designed to improve intersection performance while maintaining or improving the current level of safety was developed by Cho and Rilett. Even if the new transition preemption strategy improved both the safety and efficiency of IHRGCs, the performance of the strategy is affected by train speed. Understanding the impact of this factor is essential in order to implement ITPS. In this paper, the effects of train speed were analyzed using a VISSIM simulation model which was calibrated to field conditions. It was concluded that the delay is affected more by train speed than the transitional preemption strategy and the safety of the intersection is not affected by train speed once an advanced preemption warning time(APWT) is equal to or greater than 90 seconds.

• International Journal of Highway Engineering
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• v.10 no.4
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• pp.235-245
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• 2008

Since rapidly increase of tunnel with increasing of expressway, the study on safety improvement of safety device at entrance of expressway tunnels is necessary. The existence of tunnel occurs more speed reduction than an upward slope by itself, the collision accident of tunnel entrance causes heavier damage than that of general accident on the road. So, many kinds of safety devices such as poly-ethylene barrier, guard-rail are placed on the road side. But these devices affect the drivers as an obstacle. Although there are various safety devices that are placed at tunnel entrance, this study is related to following 2-cases. One is that the poly-ethylene barrier is placed and the other is that a safety devices is not placed. The reason that these two cases are selected, is that poly-ethylene barrier is usually placed at many tunnel entrances and safety devices can affect the drivers as an obstacle. This study is related to the difference of right-hand side clearance between inside tunnel and outside tunnel, too. The average difference observed car speed and VDS(vehicle detect system) speed nearby the tunnel is analysed. Through the statistical analysis of the average difference, this study suggests an alternatives on safety improvement of safety devices at entrance of expressway tunnels. It is concluded that the small difference of right-hand side clearance is desirable to drivers when a poly-ethylene barrier is placed. And when the difference of right-hand side clearance is large, no safety devices is desirable, and when the difference of right-hand side clearance is small, poly-ethylene barrier should be placed to improve safety.

• International Journal of Highway Engineering
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• v.7 no.4 s.26
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• pp.163-171
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• 2005

Current roads were designed and constructed based on the design criteria and thus those were overly simplified drivers' needs. The road criteria do not suggest the desirable range of the design values but suggest the minimum requirements for the road design. Therefore, a completed road design based on the design criteria does not always guarantee the best design in terms of safety and it sometimes violates drivers' expectation. Therefore, the ROSSAV(ROad Safety Survey and Analysis Vehicle) is being developed by the KICT to evaluate road safety and increase driving safety. In this paper, the image capture system was described in detail. The image capture system is consisted of two front view cameras, two side down-looking cameras and a synchronization device. Two front view cameras were used to take a picture of road and road facilities at the driver's viewpoint. Also, two side down-looking cameras were used to capture road surface image to extract lane markings. A synchronization device were used to generate image capturing signal at the fixed distance spacing huck as every 10m. The front view images could be used to calculate and measure highway geometry such as shoulder width because every image is saved with it's locational information. And also the side down looking images could be used to extract median lane mark which representing road alignement efficiently.