• Electronics and Telecommunications Trends
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• v.18 no.1 s.79
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• pp.33-41
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• 2003

차량용 레이더란 지능형 교통시스템의 여러 가지 구현 목표 가운데 차량의 안전 운행과 관련된 부분으로 열악한 기상조건 또는 운전자의 부주의로 인해 발생 가능한 사고를 미연에 방지할 목적으로 개발된 시스템이다. 본 고에서는 이러한 차량용 레이더에 요구되는 여러 가지 기술적인 사항들과 세계적인 업계의 동향 그리고 나아가 국내의 기술기준에서 고려해야 할 사항들에 관하여 개괄적으로 살펴보았다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1149-1150
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• 2023

본 논문은 자동차의 ECU 사용의 증가에 의해 개발한 자동차 소프트웨어 아키텍처 표준인 UTOSAR(AUTOmotive Open System ARchitecture)와 이의 최신 기술 동향인 Adaptive AUTOSAR, 그리고 소프트웨어 정의 차량(Software Defined Vehicle)에 대해 조사하고 분석하였다. 이러한 AUTOSAR와 SDV의 발전은 자동차 산업의 미래를 형성하는 주요한 도구로서, 효율적인 자동차 소프트웨어 개발과 관리를 지원하며 더욱 지능적이고 연결된 자동차의 실현을 위한 기반을 마련한다.

• Journal of Sensor Science and Technology
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• v.26 no.2
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• pp.91-95
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• 2017

Recently, infrared (IR) spectrometers have been required in various fields such as environment, safety, mobile, automotive, and military. This IR dispersive sensor detection method of substances is widely used. In this study, we fabricated a silicon (Si) prism-based near infrared (NIR) spectrometer utilizing micro electro mechanical system (MEMS) technology. Si prism-based NIR spectrometer utilizing MEMS technology consists of upper, middle, and lower substrates. The upper substrate passes through the incident IR ray selectively. The middle substrate, acting as a prism, disperses and separates the incident IR beam. The lower substrate has an amorphous Si (a-Si)-based bolometer array to detect the IR spectrum. The fabricated Si prism-based NIR spectrometer utilizing MEMS technology has the advantage of a simple structure, easy fabrication steps, and a wide NIR region operating range.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.530-531
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• 2010

최근 고유가 문제와 환경에 대한 관심 증가로 인해 친환경 저연비 자동차에 대한 기술 연구가 다양한 분야에서 활발히 진행되고 있다. 이 가운데서도 특히 반도체 및 배터리의 급속한 기술발전으로 자동차용 부품들이 기계식 방식에서 전자식 방식으로 대체되고 있다. 자동차 동력효율을 높이기 위해 내연기관 및 주변 전장장치들의 온도를 주행조건에 따라 제어하여 적정하게 유지시킬 필요가 있으며 이를 위한 자동차 부품으로 전동워터펌프의 중요성이 커지고 있다. 본 논문에서는 이와 같은 자동차용 전동워터펌프 제어기 개발을 위하여 브러시리스형 DC모터를 적용하였으며, 내환경성과 고신뢰성을 고려하여 제어기를 개발하였다.

• Transactions of the Korean Society of Automotive Engineers
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• v.21 no.4
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• pp.96-105
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• 2013

This paper presents a standardization method for designing wire harness systems, based on the control types and functional blocks, for use in commercial vehicles. With a rapid increase in the installation of systems with added new features, it is very important to develop a reliable wire harness design in a short time by standardizing wire harness designs and reusing the standard design. Because the function of a system, particularly, for commercial vehicles, varies significantly on the basis of the requirements, regulations, and options, it is not effective to establish one standard design for one system. In addition, a system with the same function may differ in terms of the input conditions and output loads on the basis of the installed vehicle types, and it is not practical to standardize a harness design targeting an entire system. In this study, the wire harness designs of a system were classified into six categories based on the control types of the system: switch driven, control of a switch, control of an electronic control unit, unit driven, control of a unit, and connector operation. Then, a wire harness design of each system was divided into three blocks according to their functions: the control, drive, and monitoring blocks. The standard wire harness designs were made for each functional block of each control type. The advantage of this proposed method is that an effective and practical design can be obtained, which covers the diversities in the same system for different grades of commercial vehicles with a reduction in the number of wire harness supplements.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.9
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• pp.59-64
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• 2011

Ultra wideband radars attract considerable attention as a short range automotive radar because of its high range resolution. Radar signal reflected from a target often contains unwanted echoes called as clutter, so the detection of target is difficult due to clutter echoes. Therefore, it is important to investigate the radar detector for better detecting from the reflected signals. In this paper, the optimal detector is obtained for various mean and variance value in log-normal clutter environment. The types of non-coherent detectors used are square law detector, linear detector, and logarithmic detector. The performances of detectors are compared in log normal clutter environment and the suitable detector is determined for automotive short range radar application.

• The Transactions of the Korean Institute of Power Electronics
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• v.15 no.5
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• pp.381-386
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• 2010

A non-contact type magnetic signal monitoring equipment for automotive electric devices is proposed in this paper. There are many kinds of actuators in the car like solenoid, relay, motor, injector, etc which are operated by magnetic energy. It is difficult to find out whether the actuators operate well or not because the terminals of the actuators are combined to the connectors. In this paper a non-contact type magnetic signal monitoring equipment using Hall effect sensor is proposed to measure the magnetic signal of the actuators very easily to find out the actuators' operating status. The simulation and experimental results show that the developed equipment is very useful and has good performance.

• Journal of Power Electronics
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• v.17 no.5
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• pp.1288-1297
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• 2017

The estimation of the remaining useful life (RUL) of lithium-ion (Li-ion) batteries is important for intelligent battery management system (BMS). Data mining technology is becoming increasingly mature, and the RUL estimation of Li-ion batteries based on data-driven prognostics is more accurate with the arrival of the era of big data. However, the support vector machine (SVM), which is applied to predict the RUL of Li-ion batteries, uses the traditional single-radial basis kernel function. This type of classifier has weak generalization ability, and it easily shows the problem of data migration, which results in inaccurate prediction of the RUL of Li-ion batteries. In this study, a novel multi-kernel SVM (MSVM) based on polynomial kernel and radial basis kernel function is proposed. Moreover, the particle swarm optimization algorithm is used to search the kernel parameters, penalty factor, and weight coefficient of the MSVM model. Finally, this paper utilizes the NASA battery dataset to form the observed data sequence for regression prediction. Results show that the improved algorithm not only has better prediction accuracy and stronger generalization ability but also decreases training time and computational complexity.

• Journal of the Korean Operations Research and Management Science Society
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• v.33 no.4
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• pp.101-118
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• 2008

This study compares supply chain integration practices of high performing manufacturing plants in Korea and those in the U.S., Japan, and six European countries. Data were drawn from the High Performance Manufacturing(HPM) Round 3, a joint data-collection effort on manufacturing and supply chain management. Specifically, in the automotive, electronics, and machinery industries, we selected twenty Korean plants with high performance reputation and chose the same number of non-Korean plants(HPM top 20), based upon their competitive manufacturing capability index and customer satisfaction index. The Korean plants do not significantly differ from HPM top 20 plants in that internal value creation activities are coordinated and integrated at the corporate level and between plants. The Korean plants, however, demonstrated more integration with suppliers than with customers, and only the two of them were classified as 'outward facing', which pursues greater integration with both customers and suppliers. Unbalanced and lower integration with customers of the Korean plants was attributed to the lower than expected manufacturing capability and customer satisfaction. Implications for supply chain professionals were discussed.

• ETRI Journal
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• v.41 no.6
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• pp.731-738
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• 2019

We proposed a novel electromagnetic band-gap (EBG) cell-embedded antenna structure for reducing the interference that radiates at the antenna edge in wireless access in vehicular environment (WAVE) communication systems for vehicle-to-everything communications. To suppress the radiation of surface waves from the ground plane and vehicle, EBG cells were inserted between micropatch arrays. A simulation was also performed to determine the optimum EBG cell structure located above the ground plane in a conformal linear microstrip patch array antenna. The characteristics such as return loss, peak gain, and radiation patterns obtained using the fabricated EBG cell-embedded antenna were superior to those obtained without the EBG cells. A return loss of 35.14 dB, peak gain of 10.15 dBi at 80°, and improvement of 2.037 dB max at the field of view in the radiation beam patterns were obtained using the proposed WAVE antenna.