Optical design of automobile headlamp based on ADB
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摘要: 为了避免由于远光灯使用不当而产生的一系列交通事故，且带给驾驶员更好的驾驶体验，设计了具有可以主动调整远光光束分布的自适应远光系统—ADB(adaptive driving beam)。基于非成像光学理论，采用照度优化设计法，通过计算来合理划分区域，控制相应LED的亮灭，以此达到不同远光光型的实现。通过蒙特卡洛模拟法追迹光线，测试结果表明：配光结果满足现行仅有的对自适应远光(ADB)配光规定，且当全部LED工作时，照度最大值为111 lx，模组光学系统效率为35.7%。Abstract: In order to avoid a series of traffic accidents caused by improper use of high beam lamps, and to give drivers a better driving experience, an adaptive driving beam (ADB) illumination system was designed, which can actively adjust the distribution of high beam. Based on the theory of non-imaging optics, the illumination optimization design method was adopted and the area was divided reasonably by calculation to control the brightness and extinguishing of corresponding LED, so as to achieve the different types of high beam. Through tracing the light with Monte Carlo simulation method, the simulation result shows that the final result of light distribution fulfills the current only for adaptive driving beam (ADB) light distribution regulation. When all the LEDs work, the maximum illumination value is 111 lx, and the efficiency of the module optical system is 35.7%.
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Keywords:
- high beam /
- ADB /
- LED /
- light distribution regulation
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图 3 平面-非球面透镜光成像光路图
Figure 3. Beam path diagram of planar-aspherical lens light imaging
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图 5 旋转测试法对各测试点测量
Figure 5. Measurement diagram of each test point by rotation test method
表 1 自适应远光配光测试标准要求
Table 1 Requirements for adaptive driving beam light distribution test
A part Test points horizntal Vertical Maximum luminous intensity/cd left side line 1 4.8°L-2°L Up 0.57° 625 The right traffic for the oncoming car is at 50 meters Right side line 1 2°R-4.8°R Up 0.57° 625 The Left traffic for the oncoming car is at 50 meters left side line 2 2.4°L-1°L Up 0.30° 1750 The right traffic for the oncoming car is at 100 meters Right side line 2 1°R-2.4°R Up 0.20° 1750 The Left traffic for the oncoming car is at 100 meters left side line 3 1.2°L-0.5°L Up 0.15° 5450 The right traffic for the oncoming car is at 200 meters Right side line 3 0.5°R-1.2°R Up 0.15° 5450 The right traffic for the oncoming car is at 200 meters Line 4 1.7°L-1.0°L Up 0.30° 1850 The right traffic for the the preceding car is at 50 meters > 1.0°R-1.7°R 2500 Line 4 1.7°R-1.0°L Up 0.30° 1850 The left traffic forthe the preceding car is at 50 meters > 1.0°L-1.7°L 2500 Line 5 0.9°L-0.5°R Up 0.30° 5300 The right traffic for the the preceding car is at 100 meters > 0.5°R-0.9°R 7000 Line 5 0.9°R-0.5°L Up 0.30° 5300 The left traffic forthe the preceding car is at 100 meters > 0.5°L-0.9°L Line 6 0.45°L-0.45°R Up 0.10° 16000 B part Test points horizntal Vertical Minumum luminous intensity/cd 50R 1.72R D 0.86 5100 50V V D 0.86 5100 50L 3.43L D 0.86 2550 25LL 16L D 1.72 1180 25RR 11R D 1.72 1180 
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表 2 各测试点发光强度
Table 2 Light intensity of each test point
name value OK
[lx/25]min/max
%/%min
[lx/25]max
[lx/25]test pos./area H1 H/V1 V
[deg]found pos.
[deg]Emax 111.2 OK 232/46 48.00 240.0 -6.9, 0.1 HV > 80%Emax 101.1 OK 114/-- 88.96 -- -0.0, 0.0 H2-H3 99.71 OK 415/-- 24.00 -- -2.5, 2.5:0.0, 0.0 -1.1, 0.0 H1-H4 98.95 OK > 1000/-- 6.00 -- -5.0, 5.0:0.0, 0.0 -3.5, 0.1 H2 101.9 OK 424/-- 24.00 -- -2.5, 0.0 H3 102.7 OK 428/-- 24.00 -- -2.5, 0.0 H1 102.4 OK > 1000/-- 6.00 -- -5.0, 0.0 H4 103.5 OK > 1000/-- 6.00 -- -5.0, 0.0
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表 3 配光标准判断
Table 3 Judgement of light distribution standard
name value OK
[lx/25]min/max
%/%min
[lx/25]max
[lx/25]test pos./area H1 H/V1 V
[deg]found pos.
[deg]Emax 98.12 OK 204/41 48.00 240.0 -6.0, 0.0 HV > 80%Emax 94.69 OK 121/-- 78.50 -- -0.0, 0.0 H2-H3 81.06 OK 338/-- 24.0 -- -2.5, 2.5:0.0, 0.0 -0.8, 0.0 H1-H4 75.49 OK > 1000/-- 6.00 -- -5.0, 5.0:0.0, 0.0 -5.1, 0.0 H2 86.34 OK 360/-- 24.00 -- -2.5, 0.0 H3 95.33 OK 397/-- 24.00 -- -25.0, 0.0 H1 75.49 OK > 1000/-- 6.00 -- -5.0, 0.0 H4 95.32 OK > 1000/-- 6.00 -- -5.0, 0.0
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