논문 상세보기
pp.85-92
This project aimed to understand the near-infrared (NIR), intensity, and reflectivity characteristics of LiDAR for measuring retroreflectivity and to understand the correlation between the characteristics of LiDAR and retroreflectivity. A 600 m-testbed was investigated using a survey vehicle equipped with LiDAR, and the testbed retroreflectivity and LiDAR data measurement values were compared. The reflectivity and intensity at night were not affected by sunlight compared with daytime, enabling stable data collection. However, NIR reacted very sensitively to sunlight, and the difference between daytime and nighttime NIR values was very large. In addition, by comparing the absolute error between the retroreflectivity and LiDAR data, we observed that the reflectivity was consistent with the data difference between day and night, and it was not significantly affected by sunlight. However, the intensity showed that the daytime measurement data were more scattered than the nighttime measurement data, resulting in low-precision collection stability caused by sunlight. An analysis of the correlation between retroreflectivity and LiDAR data using 40 data points revealed that the reflectivity and intensity data at night were highly correlated with retroreflectivity, with a P-value of less than 0.05. Reflectivity and intensity values at night correlate with retroreflectivity. The NIR light is sensitive to sunlight. Thus, it can be used as a solar correction index for future retroreflectivity analyses using intensity.
1. 연구배경 및 목적
2. 재귀반사도 및 라이다 측정 원리
2.1. 재귀반사도 측정 원리
2.2. LiDAR 센서 기술 원리
3. 실험 방법
3.1. 실험 장비 및 환경
3.2. 테스트베드 실험 방법
4. LiDAR 데이터 분석 및 상관관계
4.1. 테스트베드 섹션 별 재귀반사도 측정
4.2. 주야간 LiDAR 데이터 차이 분석
4.3. 재귀반사도를 이용한 주야간 LiDAR 데이터 비교
5. 결론
REFERENCES
