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고령자 친화형 자동차의 전조등 개발을 위한 광원의 특성 연구
김형구(Hyounggu Kim),강병도(Byungdo Kang),이호상(Hosang Lee) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Aging of general population structure has become one of the major issues in various social change these days in Korea. So, many researches have been performed to develop elder friendly devices and vehicle for older drivers. In this study, developing headlamp of elderly vehicle, characteristics of light sources that are used on the vehicle were investigated using photometric equipment and spectral analyzer. Four kinds of bulbs such as standard halogen, yellow coated halogen, blue coated halogen and HID(High intensity discharge) were used in this experiment. Illuminance, chromaticity, color temperature, dominant wave length and spectral distribution were measured. Glare index was obtained by measuring illuminance at eye point. adaptation luminance and angle between light sources and driver's position. Comparisons are made among the four light sources. Consequently, photometric performances of yellow coated halogen were much lower than others, but discomfort glare index of that was much higher than other light sources.
김형구(Hyounggu Kim),강병도(Byungdo Kang),이호상(Hosang Lee),신재승(Jaeseung Sin),박준영(Junyeong Park) 대한인간공학회 2009 대한인간공학회 학술대회논문집 Vol.2009 No.11
Aging of general population structure has become one of the major issues in various social change these days in Korea. So, many researches have been performed to develop elder friendly devices and vehicle for older drivers. In this study, one of headlamp system for elder friendly vehicle, adaptive headlamp under rainy weather is being developed. Prototype adaptive headlamp were manufactured using D2S(High intensity discharge bulb) light source. Illuminance and luminance distribution of adaptive headlamp are investigated to evaluate its performance. Forty six subjects of two groups (drivers under and over age 65) participated in experiment. The questionnaires were performed about various driving habits and conditions with all of subjects. Glare index and forward visibility were evaluated by observing in driver's seat against oncoming test vehicle with three kinds of headlamps such as halogen, HID and adaptive headlamp. From the results, Illuminance and luminance distribution of adaptive headlamp were much lower than others in the near field. Glare of adaptive headlamp for adverse weather was superior to those of HID headlamp at 10~20m ahead. Forward visibility performances of adaptive headlamp was comparable to those of HID headlamp.
도로곡률에 따른 AFLS 전조등 최적 회전각도에 관한 연구
이호상(Hosang Lee),강병도(Byungdo Kang),김형구(Hyounggu Kim),최영태(Youngtae Choi),황재형(Jaehyung Hwang) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Headlamps are important safety components in ensuring good forward visibility and informing oncoming vehicles of their own presence at night. Lots of new technology were applied in headlamps. AFLS(Adaptive Front Lighting System) means a lighting device, providing beams with differing characteristics for automatic adaptation to varying conditions of use of the dipped-beam and main-beam. In this paper, Optimum swivel angle of AFLS headlamp were investigated using two kinds of prototypes of head lamp. Visibility of AFLS headlamp was evaluated using the eye mark camera in various road conditions such as highway and national road. As a result, optimum swivel angel of AFLS head lamp was 19° considering a variety of road curvature and No glare swivel angle was 24°. AFLS head lamps were very useful to improve visibility during driving at night.
이호상(Hosang Lee),강병도(Byungdo Kang),김형구(Hyounggu Kim),박준영(Junyeong Park) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Due to the rapid prevalence in Lighting Emitting Diodes(LEDs) technology, it has been increasingly used as automotive lighting devices and had a strong effect on its exterior design. Mirror-Mounted Turn Signals(MMTS) composed of LEDs are lighting signal lamps which are combined with high technology and innovative design. This paper studies MMTS along with various experiments regarding photometric characteristics, geometric visibility and cognitive characteristics. Experimental results are compared to those of MMTS and conventional auxiliary turn signals. As results of the study, MMTS were evaluated to be better stylish and cognitive than conventional auxiliary turn signals. This study is expected to be used as database for revision of Korea Motor Vehicle Safety Standard(KMVSS).
자동차 전조등용 비규격 전구의 문제점에 관한 실험적 연구
이호상(Hosang Lee),강병도(Byungdo Kang),김형구(Hyounggu Kim),최영태(Youngtae Choi),박경석(Kyungsuk Park),김영준(Youngjun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
These days non-standard bulbs such as coated bulbs with white-blue color, high power consumed bulbs and HID(High intensity discharge) bulbs were widely sold in the market. Non-standard bulbs are short of standard of automotive bulbs and can be caused glare to oncoming drivers and pedestrians. In this study, three kinds(100/90W, 130/125W, HID)of non-standard bulbs were used in this experiment. Photometric characteristics of non-standard bulbs are investigated using photometric measuring equipment. In addition, fuel consumption rate was predicted from experimental data of reference. Temperature of the inside of headlamp was measured using thermometer. The experimental results were compared with those of standard halogen bulb(60/55W). Consequently, photometric performances of non-standard bulbs were much inferior to standard halogen bulbs.
강병도(Byungdo Kang),이호상(Hosang Lee),김형구(Hyounggu Kim),박경석(Kyoungsuk Park),용부중(Boojoong Yong),서태범(Tae-Beom Seo) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
LEDs (Light Emitting Diode) become more significant in exterior automotive lighting systems since they have been applied to CHMSL (Center High Mounted Stop Lamps) in 1990s. The LEDs are environmental friendly as well as energy saving light sources. They also provide long life and virtually unlimited styling potential in automotive headlamp applications. However, the chromaticity characteristics and the heat dissipation of LED headlamps are much different from conventional headlamps such as HID and halogen. An appropriate heat dissipation in LED headlamps is necessary for practical usage. In this study, we develop a heat dissipation system for an LED headlamp using CFD (Computerized Fluid Design) method. The prototype of LED headlamp is evaluated with respect to chromaticity performance using an anti-heat chamber. The developed LED headlamp shows a good visibility performance while further development for chromaticity is still necessary.