• 전기의세계
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• v.43 no.6
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• pp.27-34
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• 1994

한국의 고속전철을 위하여 불란서, 독일, 일본 등 각국이 제안한 구동 시스템의 전력 변환 장치를 개괄적으로 살펴보았다. 고속전철 부분의 선발 주자인 불란서는 오래전에 동기 전동기 구동 시스템을 채택하였으나, 그 후 전력 변환 기술 및 전력용 변환소자의 발달로 인하여 후발 주자인 독일과 일본은 유도 전동기 시스템을 채택하였다. 이는 앞으로 고속전철 기술을 흡수하고 국산화함에 있어 구동 시스템 이외에 차량, 통신 분야 등 불란서 고속전철이 갖는 장점과 독일, 일본의 고속전철에서 채택하고 있는 유도 전동기 시스템과의 같이 전력전자의 발전에 따르는 전력 변환 장치를 포함한 새로운 구동 기술을 결합하도록 해야 함을 보여주고 있다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.9
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• pp.1409-1415
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• 2017

The navigation and EDR(Event Data Recorder) have a different roles but also a lot of similar or common functions and elements. A representative element is a GPS. The GPS of navigation is a more higher than the that of EDR in performance. The high performance GPS has a very short initialization time and more accurate than the GPS of EDR. And the informations of OBD(On Board Diagnostics) is able to be shared in navigation and EDR. But these inter-working product between the navigation and EDR has been not yet shown. So, this paper is aimed to show how to interwork in two devices. We utilize USB bulk communication in two devices for inter-working. It is very simple ways and it could interwork in GPS, event video and ODB II data. It could be effective in cost competence and convenience. These was implemented by hardware and software and proved by the standard test.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10d
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• pp.553-556
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• 2006

텔레매틱스는 통신장치와 컴퓨터를 이용하여 경로안내 서비스, 주변정보안내, 이메일 서비스 등과 같은 다양한 서비스를 차량 사용자에게 제공하는 통합기술이다. 운전자가 차량 운행 중에 작은 장치에 데이터를 입력하거나 디스플레이된 정보를 읽는 것은 무척 위험하다. 그래서 우리는 운전자의 손은 운전대에 그리고 눈은 도로 및 주변상황을 확인할 수 있도록 하기 위해서 개방형 텔레매틱스 환경에서 음성기반의 시스템을 개발할 수 있는 시스템 구조를 제안하였다. 그리고 제안된 시스템 구조를 이용하여 개방형 텔레매틱스 시스템을 위한 텔레매틱스 게이트웨이와 프레임워크를 기반으로 텔레매틱스용 음성기반 이메일 서비스를 개발하였다.

• Defense and Technology
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• no.10 s.140
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• pp.6-15
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• 1990

Satory '90 전시회는 세계규모의 무기전시회중 하나이다. 금년이 제12회로서 7월 25일부터 5일간 파리 근교의 육군 기동장비 시험장에서 개최되었으며, 3만5천$\m^2의 전시면적에 2백92개 프랑스 방산업체가 참여하여 2천5백여점의 장비가 전시되었다. 프랑스 정부에서 공식 초청한 66개국 3백 30여명의 주요 인사를 비롯하여 세계 각국의 무기체계 관계자 약 5만여명이 참가한 이번 Satory '90 전시회에는 기동차량, 인원수송용 장갑차량, 전차, 무장, 차리세대 유도무기, 항공수송 장비 및 기계화 공병장비뿐 아니라 야전병원 시설 및 광역 통신체계등에 이르는 모든 주요분야의 지상무기가 총 망라되어 전시되었다.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.355-358
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• 1998

Train control and monitoring system for the railway train requires a reliable real-time communication network. The system have various functions, diagnostics, passenger informations, and fault-tolerant controls. For this system, an international standard called TCN(Train Communication Network) is proposed by IEC and the train industries. The TCN is composed of two layers, wire train bus(WTB) and multifunction vehicle bus(MVB). This paper evaluates the performance of the proposed WTB and modified WTB. And computer simulations are performed. The evaluated results can be used for the fault tolerant network in the railway train system.

• Journal of Institute of Control, Robotics and Systems
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• v.3 no.6
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• pp.632-638
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• 1997

The growing number of electronic components used in automobiles has given rise to problems concerning the increasing number, size and weight of the wiring harnesses. As an approach to resolve these problems, multiplexed wiring systems using automotive communication protocol such as Controller Area Network(CAN), Advanced PALMNET and J1850 have been developed by many automobile companies. In order to compare these protocols quantitatively, this paper presents the performance evaluation of CAN and Advanced PALMNET via discrete event simulation. Through numerous simulation experiments, several important quantitative performance factors such as the probability of a transmission failure, average system delay(data latency), and throughput have been evaluated.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.741-742
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• 2012

This paper gives an asynchronously adaptive message passing scheme for selective retransmission of dropped packets based on a different fragment in size according to both the type of cause that makes packet loss and variation of traffic load in vehicle wireless communication networks. With the proposed scheme, it is possible to enhance the correctness for under-standing awareness of current network situation and to reduce the number of control packets by increasing or decreasing the size of a fragment along with the changes in network traffic load.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.633-634
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• 2022

본 논문에서는 비행 시간 측정(TOF) 센서와 동일한 View로 고정되고 차량의 진행 방향으로 수평 설치 가능한 카메라를 연구 개발한다. 이 카메라는 객체 인식 정확도 향상을 위하여 1,280×720 해상도 적용하고 30fps로 영상을 출력하며 180°이상의 광각 어안렌즈를 적용하는 것이 가능도록 한다.

• KIPS Transactions on Computer and Communication Systems
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• v.7 no.6
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• pp.137-144
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• 2018

Vehicular Ad-hoc Networks (VANETS) have enabled to provide a variety of applications such as accident notification, content usage, etc. These applications have spatio-temporal data which have an interesting region and a lifetime according to their properties. However, geocasting protocols to deliver data to an interesting region can provide data to all vehicles in the region through a single transmission only at the current time, but cannot provide data to vehicles passing through the region during the lifetime of the data. Thus, we propose a spatio-temporal geocasting protocol called STGP using a regional caching scheme to send data to vehicles in an interesting region during a data lifetime in VANETs. For efficient and reliable regional caching, the proposed protocol uses the beacon-based data sharing, the extra caching elimination, and the distance-based caching exchange. Simulation results verify that the proposed protocol achieves more reliable and efficient data delivery compared with the existing protocol.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.805-808
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• 2008

In this paper, it was performed the analysis on various intersection acoustic patterns for detection rate improvement of accident sound detection system : an acoustic pattern analysis on general traffic noise, an acoustic pattern analysis on engine noise, an acoustic pattern analysis on obstruct factors for accident sound detection system. There are remarkable differences between the acoustic patterns of traffic noise and accident sound, and we most consider the acoustic patterns when we compose the accident traffic detection system by acoustic because there is error range of 20[dB] according to the volume of traffic in intersection.