Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
In this study, we used a headlamp tester based on the inspection standards of the Road Transport Vehicle Act to investigate and analyze the headlamp irradiation characteristics of different light sources, HIR2 halogen lamps and bulb-type LEDs, and investigated and analyzed the correlation and irradiation characteristics of high beam and low beam.The experimental results showed that when switching to high beam, the bulb-type LEDs meet the inspection standards for low beam characteristics that meet the inspection standards, but the halogen lamps are highly likely not to meet them.The low beam irradiation luminance against the irradiation time decreased by about 5% after 120 minutes of irradiation for the HIR2 halogen lamps and about 15% for the bulb-type LEDs. The low beam irradiation direction against the irradiation time changed by 5 cm downward and 40 cm to the right for the halogen lamps, and by 2.5 cm downward for the bulb-type LEDs. There was no change in the irradiation direction in high beam for both immediately after turning on the lamps until 120 minutes later.
