• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.449-450
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• 2019

본 논문에서는 차량 내 이산화탄소 농도 측정을 통해 운전자의 졸음운전을 예방하는 모델을 제안한다. 제안된 모델은 이산화탄소 농도 측정 센서를 연결한 아두이노 보드를 차량 내부에 부착하여 측정된 수치를 실시간으로 분석한다. 분석된 수치를 운전자, 탑승자에게 전송하여 자발적으로 졸음 방지를 유도한다. 또한 설정된 수치 이상인 경우 차량 내 사용자와 차량 외 보호자에게도 경고 메시지를 전송하고 차량 내 공기 상태를 알린다. 추후 차량 내 환경과 운전 시간, 탑승자 정보 등을 활용하여 전송된 수치를 분석하면 운전 환경 개선을 위한 방안을 모색할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.107-109
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• 2022

This paper proposes a new security system to detect cyber-attacks based on message authentication in a in-vehicle network. In the in-vehicle network, when a sending node transmits messages in a broadcast manner, it only uses a message identifier, rather than a node's identifier. It leads to a problem not identifying the source. In the proposed system, the sending node generates a message authentication code (MAC) using a cryptographic hash function to the control data and transmits it with the control data. When generating the MAC for each message, a multidimensional chaotic map is applied to increase the randomness of the result. The receiving node compares its MAC generated from the control data in the received message with the MAC of the received message to detect whether the message transmitted from the sending node is forged or not. We evaluate the performance of the proposed system by using CANoe and CAPL (Communication Access Programming Language). Our system shows a 100% of detection rate against cyber-attacks injected.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.13 no.2
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• pp.138-144
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• 2020

Currently, an autonomous vehicle studies are working to develop a four-level autonomous vehicle that can cope with emergencies. In order to flexibly respond to an emergency, the autonomous vehicle must move in a direction to minimize the damage, which must be conducted by judging all the states of the road, such as the surrounding pedestrians, road conditions, and surrounding vehicle conditions. Therefore, in this paper, we suggest a passenger detection and sharing system to detect the passenger situation inside the autonomous vehicle and share it with V2V to the surrounding vehicles to assist in the operation of the autonomous vehicle. Passenger detection and sharing system improve the weighting method that recognizes passengers in the current vehicle to identify the passenger's position accurately inside the vehicle, and shares the passenger's position of each vehicle with other vehicles around it in case of emergency. So, it can help determine the driving of a vehicle. As a result of the experiment, the body pressure sensor applied to the passenger recognition sub-module showed about 8% higher accuracy than the conventional resonant sensor and about 17% higher than the piezoelectric sensor.

• Journal of Practical Engineering Education
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• v.9 no.2
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• pp.149-153
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• 2017

Inside the vehicle, temperature and humidity are suddenly changed. Accordingly, HVAC System's temperature control is very complicated. But, clarifying the relationship between temperature and humidity can reduce the control parameters. Therefore, this paper describes the relationship between temperature and humidity in the vehicle and presents a problem solving method in terms of control technologyThe vehicle sensor monitors the factors required for vehicle control and plays a role in enabling optimal control from the obtained information. Of these sensors, the driving environment of the driver is determined by the temperature and humidity inside the vehicle, and the characteristics of the vehicle suddenly change rapidly. Accordingly, HVAC System's temperature control is very complicated. But, clarifying the relationship between temperature and humidity can reduce the control parameters. Therefore, this paper describes the relationship between the temperature and humidity in the vehicle, and presents a method for controlling the temperature and humidity in the vehicle as an example.

• Journal of the Korea Convergence Society
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• v.11 no.2
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• pp.155-160
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• 2020

In this study, the pleasant driving environment of the driver and passenger in the summer was investigated through the internal flow analysis of air due to the opening and closing of the car windows. The conditions on the entrance of the air conditioner with the opening and closing status of vehicle window were applied to the flow analysis by taking into consideration the actual driving environment. The automotive air conditioning outlet, the seat and the inside of car were modeled. As the air flow inside the car was analyzed, the air flow configuration and the temperature distribution were examined. In this analysis, the results were taken in consideration of only the effects of internal air and the opening and closing of window, assuming the interior of the vehicle as insulation. The analysis of each condition shows that these models maintain a pleasant environment. It is seen that this analysis result on the internal flow analysis according to the opening and closing of vehicle window can be applied by converging with the field of design.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.3
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• pp.187-194
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• 2012

Vehicular communication networking is one of the most important building blocks of Intelligent Transportation System(ITS). The vehicular communication network is a wireless communication system enabling vehicles to communicate with each other as well as with roadside base stations. Especially, Wi-Fi based vehicle-to-infrastructure(V2I) communication is an emerging solution to improve the safety, traffic efficiency, and comfort of passengers. In this paper, we proposed a new communication hub platform for vehicles, and explained vehicle communication technology in short. Through car simulation results, we show thar our proposed system reduces signaling interference.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.208-211
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• 2019

차량 포그 컴퓨팅 및 자율주행 자동차 개발 기술이 발전하면서 자동차 내부에 탑재된 IoT 센서들은 교통 정보 관련 다양한 정보를 수집할 수 있게 되었고, 더불어 자동차와 자동차간, 차량과 교통 인프라 간의 통신을 통해 수집된 교통 정보의 공유가 가능해졌다. 그러나 이 과정에서 알지 못하는 차량으로부터 받은 메시지를 어떻게 신뢰할 수 있는지에 대한 문제가 존재한다. 이를 보완하기 위해 평판 시스템을 적용한 연구들이 있으나 여전히 불안전한 데이터 저장방식과 통신 트래픽 문제가 존재한다. 이를 해결하기 위해 블록체인 기술을 사용된다. 본고에서는 블록체인 기반의 차량 네트워크의 평판 시스템 연구 사례를 분석한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.40-43
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• 2011

본 논문에서는 안드로이드 기반의 스마트폰에서 운전자의 운전 패턴에 따른 연료 소비량을 감소하기 위한 운전 습관을 유도하는 방법을 제안하였다. 이 시스템은 차량의 정확한 내부 상태 정보를 바탕으로 운전 상태를 스마트폰으로 제공한다. 차량의 상태정보를 추출하기 위해서 차량 네트워크인 CAN 버스를 사용하였으며, 이를 하드웨어로 구현하였다. 효율적인 ECO_Driving을 위한 차량 데이터들을 추출하여 분석하였으며, 이들 데이터를 바탕으로 운전자에게 에코여부를 제공하는 애플리케이션을 구현하였다. 이 시스템으로 경제운전으로 배기가스 감축, 에너지절약과 사고 예방을 유도할 수 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.69-73
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• 2013

Internal heat exchanger (IHX) apparatus using the temperature difference between high and low pressure lines in vehicle air conditioning system is a good method to enhance the cooling performance. In this study, we designed various double-pipe internal heat exchangers which have inner fins between the internal pipe and external pipe. We also measured the performance characteristic (pressure drop, cooling capacity, compressor work and coefficient of performance (COP)) of the modified internal heat exchangers that had the change of the fin height and the inside shape of the internal pipe. This experimental results indicated that the liner and serration type internal heat exchanger was the best cooling performance. In addition, the air conditioning system with the liner and serration type internal heat exchanger showed the improved performances of about 6.4% and 9.2%, respectively, for the cooling capacity and COP.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.157-160
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• 2008

Bridge decks are directly exposed to traffic loads and environmental conditions like rainfall water and de-icing chemicals. In this reason, there are often observed the deteriorations of asphalt overlay and concrete deck. In this study, 32 concrete decks were evaluated by the road inspection vehicle and the GPR mounted on the vehicle. The GPR could detect the deteriorations of concrete decks under asphalt overlay, even though the asphalt overlay looks like soundness. Therefore, for the efficient maintenance of concrete bridge decks, GPR examination should be performed with visual inspection.