• Information and Communications Magazine
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• v.30 no.10
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• pp.3-9
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• 2013

최근 텔레매틱스 기술은 운전자와 차량, 차량과 외부의 정보들을 이용하여 다른 산업과의 융합이 급속히 진행되고 있으며, 다양한 서비스에 대한 요구 역시 점차 증가하는 추세이다. 최근에는 차량의 위치 및 궤적 데이터 정보 서비스뿐만 아니라 차량을 통한 차별화된 고객별 영업, 마케팅 및 서비스 제공에 대한 VRM(Vehicle Relationship Management)이 대두되고 있다. VRM은 차량의 주행 정보, 과거 이동정보, 운전자의 정보 등과 같은 차량에 관련된 다양한 정보에서 특정 규칙과 패턴을 추출한 후에 그것에 알맞게 영업, 서비스 생산, 마케팅 전략을 수립 및 적용할 수 있도록 해주는 것으로 CRM과 유사하다고 할 수 있다. 따라서 본 논문에서는 기존의 CRM의 성공 요인에 대한 선행 연구를 검토해 VRM의 전략적 관점에서 프로세스에 준거하여 고객자산가치관리와 VRM의 핵심기능인 고객자산가치 관리역량을 통해 차량의 주행정보, 차량 정검 정보, 운전자의 정보 등과 같은 차량에 관련된 모든 정보를 VRM 프레임워크가 갖추어야 할 요소를 도출하고 차량 기반 고객관계 프레임워크 모델을 제시해보고자 한다.

• Journal of Korean Society of Transportation
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• v.29 no.4
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• pp.17-28
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• 2011

This study proposed a speed management strategy for the enhancement of traffic safety on freeways. A novel feature of the proposed strategy is to provide desirable speed information to individual vehicles. A microscopic traffic simulator, VISSIM, was used for the performance evaluation. Vehicle trajectory data were used to evaluate the various speed management scenarios including the different levels of proportions of heavy vehicles. The proposed speed management strategy would be a useful precursor for developing an effective traffic control and operations system to prevent traffic accidents on freeways.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.514-521
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• 2021

When calculating an intersection collision speed using a formula, it is very difficult to grasp the degree of deceleration of a vehicle after the collision unless there is road surface trace in the entire section where each vehicle moved from the point of collision to their final positions after the collision. A vehicle's motion trajectory shows an irregular curve after a collision due to the effects of inertia based on the driving characteristics of the vehicle, the eccentric force according to the collision site, and the collision speed. Therefore, it is very important to set the appropriate departure angle after a collision for accurate collision speed analysis. In this study, based on experimental collision data using a computer simulation (PC-Crash), the correlation between an appropriate vehicle departure angle and the post-collision speed was analyzed, and then, a regression analysis model was derived. Through this, we propose a method to calculate collision speed by applying only the vehicle departure angle in some types of collisions for traffic accidents at intersections.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.6
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• pp.134-143
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• 2020

With the worldwide spread of African swine fever, interest in livestock epidemics is growing. Livestock transport vehicles are the main cause of the spread of livestock epidemics, but no empirical quarantine procedures and standards related to the mobility of livestock transport vehicles in South Korea. This study extracted livestock-related vehicles' trajectory by utilizing the facility visit history data from the Korea Animal Health Integrated System and the DTG (Digital Tachograph) data from the Korea Transportation Safety Authority and presented them as exposure indexes aggregating the link-time occupancy of each vehicle. As a result, a total of 274,519 livestock-related vehicle trajectories were extracted, and exposure values by link and zone were quantitatively derived. Through this study, it is expected that prior monitoring of livestock transport vehicles and the establishment of post-disaster prevention policies would be provided.

• Journal of Korean Society of Transportation
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• v.33 no.4
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• pp.323-336
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• 2015

Estimating the risks on the roadway using surrogate safety measures (SSM) has an advantage in that it focuses on the vehicle trajectory directly involved in conflicts. On the other hand, there is a restriction on estimating the risks of continuous segments due to the limited data collected from a location. To overcome the restriction, this study presents the scheme of acquiring the vehicular trajectory using real time kinematics-differential global positioning system (RTK-DGPS) and develops a methodology which contains the considerations of the problems to calculate the SSM such as time-to-collision (TTC), deceleration rate to avoid collision (DRAC) and acceleration noise (AN). By using the methodology, this study shows a result from an experiment executed in a section where the variation of vehicular movement can be observed from several continuous flow roadway sections near Seoul and Gyeonggi Province in Korea. The result illustrated the risks on the roadway by the SSM metrics in certain situations like merging and diverging, stop-and-go, and weaving. This study would be applied to relate the dangers with characteristics of drivers and roadway sections, and prevenst accidents or conflicts by detecting dangerous roadway sections and drivers' behaviors. This study contributes to improving roadway safety and reducing car-accidents.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.10
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• pp.1359-1366
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• 2010

Recently, many electronic control techniques for vehicles have been developed and applied. One of the technologies can be X-by-wire such as throttle-by-wire, brake-by-wire, steer-by-wire, and etc, in which most of mechanical parts are replaced into electrical wire and actuators. In this study, the effect of throttle-by-wire and brake-by-wire control systems on vehicle velocity control, especially in a school zone, are taken into consideration. The number of accidents reported in school zones is higher than that in other places. The reason for this is that many vehicle drivers do not obey speed limit regulations. Moreover, some of the students are careless while crossing the streets. Therefore, in this study, we attempt to develop a method using throttle-by-wire and brake-by-wire control systems for automatically reducing the vehicle speed such that it will be within the speed limit. First, an engine model and a transmission system model are developed for a specific vehicle model. Second, speed reduction is carried out such that the reduction follows a pre-designed cubic spline trajectory; the trajectory is determined such that rapid deceleration, which causes discomfort to the driver and passengers, can be prevented, for which a fuzzy-PID control algorithm is applied for the trajectory following control. Finally, simulation results are presented to verify the performance of the proposed speed reduction control system.

• 한국IT서비스학회:학술대회논문집
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• 2008.11a
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• pp.490-493
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• 2008

최근 텔레매틱스 기술은 운전자와 차량, 차량과 외부의 정보들을 이용하여 다른 산업과의 융합이 급속히 진행되고 있으며, 다양한 서비스에 대한 요구 역시 점차 증가하는 추세이다. 최근에는 차량의 위치 및 궤적 데이터 정보 서비스뿐만 아니라 차량을 통한 차별화된 고객별 영업, 마케팅 및 서비스 제공에 대한 VRM이 대두되고 있다. VRM은 차량의 주행 정보, 과거 이동정보, 운전자의 정보 등과 같은 차량에 관련된 다양한 정보에서 특정 규칙과 추출된 패턴 정보를 기반으로 영업, 서비스 생산, 마케팅 전략을 수립 및 적용할 수 있도록 해주는 것으로 CRM과 유사하다고 할 수 있다. 따라서 본 논문에서는 기존의 CRM의 성공 요인에 대한 선행 연구를 검토해 VRM의 전략적 관점에서 프로세스에 준거하여 고객자산가치관리와 VRM의 핵심기능인 고객자산가치 관리역량을 통해 차량의 주행정보, 차량 정검 정보, 운전자의 정보 등과 같은 차량에 관련된 모든 정보를 VRM 프레임워크가 갖추어야 할 요소를 도출하고 텔레매틱스 기반 VRM 프레임워크 모델을 제안해보고자 한다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.8 no.6
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• pp.36-45
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• 2009

Recently, there are interested in the automatic traffic flowing and accident detection using various low level information from video in the road. In this paper, the automatic traffic flowing and algorithm, and application of traffic accident detection using traffic management systems are studied. To achieve these purposes, the spatio-temporal relation models using topological and directional relations have been made, then a matching of the proposed models with the directional motion verbs proposed by Levin's verbs of inherently directed motion is applied. Finally, the synonym and antonym are inserted by using WordNet. For the similarity measuring between proposed modeling and trajectory of moving object in the video, the objects are extracted, and then compared with the trajectories of moving objects by the proposed modeling. Because of the different features with each proposed modeling, the rules that have been generated will be applied to the similarity measurement by TSR (Tangent Space Representation). Through this research, we can extend our results to the automatic accident detection of vehicle using CCTV.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.327-329
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• 2011

본 논문에서는 3.3kW급 차량탑재형 충전기에 적합한 공진형 컨버터의 최적설계기법을 제안한다. 주어진 배터리 충전 프로파일에 대하여 대표적인 4가지 공진형 컨버터를 각각 최적의 궤적에 따라 동작하도록 하는 설계기법을 제안한다. 또한 이 충전 궤적에 따른 각 컨버터의 도통전류, 턴오프전류 등의 비교를 통하여 최적의 컨버터를 제안하고 시작품으로 타당성을 검증한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.4 no.3
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• pp.73-82
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• 1996

Vehicle movement detection by high order correlation analysis of optical sensor array signals is introduced. The optical sensors observe the road which is assumed to be a non-uniform speckle-like texture. The measurement system is applicable to general robotic movement detection because : 1) It employs a non-contact measurement method, 2) The system can be made very compact, and 3) It enables approximation of the movement trace with a sequence of arcs instead of the conventional connection of simple line segments. In this work, we have looked into estimation of running trace of an autonomous vehicle by observing the ground pattern.