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자료유형
학술대회자료
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이용철 (현대모비스) 이수봉 (현대모비스)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2022년 한국자동차공학회 추계학술대회 및 전시회
발행연도
2022.11
수록면
1,269 - 1,273 (5page)

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초록· 키워드

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Drivers can feel tired and be obstructed to look forward because of uneven road light. We needed SW to predict and prevent these uneven lights at the design stage, and to test uniformity in the product. In this paper, a contrast sensitivity function was used to develop uniformity test SW of road light of the headlamp. In order to a person to identify an object, there must be a difference in brightness. The contrast threshold to which bright and dark can be identified varies with the spatial frequency. It is called a contrast sensitivity function (CSF) that formula of the relationship between contrast and spatial frequency for human eyes. If there is a difference in brightness with respect to the driver"s viewing angle that is less than the contrast threshold, we may feel that the road light is uniform because we cannot distinguish the brightness difference. if the difference in brightness is larger than the contrast threshold, the area of road light would be felt unevenly. The viewing angle can be calculated from the distance information. Contrast can be calculated from illuminance distribution of the road light. The contrast threshold of road light felt unevenly was obtained through experiments. The test subjects checked the position felt unevenly at the real road with HAL and LED headlamp at night. The same lamps were compared through simulation of the spatial frequency and contrast of the position felt unevenly after the photometric scan at testing room. Through this, it was defined that the CSF for road light uniformity test. We developed a program that extracts the illuminance distribution along the horizontal and vertical 0.25° step line from the driver"s view and calculates the contrast and spatial frequency. The program marks uneven areas in the road light pattern. As a result, a uniformity visualization program similar to the road uniformity seen in the driver’s view. Through a uniformity visualization program. It is possible to predict and prevent uneven light at the design stage. When a problem occurs in the product, we can easily determine the area that needs to improve.

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Abstract
1. 서론
2. 이론
3. 실험 방법 및 결과
4. 결론
References

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