Optical System Research And Design Of Automobile Headlamp Based On ADB

With the progress of science and technology,the development of lamps in automobile industry tends to be intelligent.In addition to achieving basic lighting functions,it also pays more attention to the driver's experience.The driver who drive a traditional automobile needs to manually switch between high beam and low beam,but improper use of the high beam can easily cause other drivers to be dazzled,blind,and have security risks.Therefore,in the field of design and development of automobile lighting,it is necessary to have a system that can actively adjust the high beam distribution---ADB(Adaptive Driving Beam).Based on the non-imaging optics theory,this paper uses the optical software LucidShape and LucidDrive to research and explore the automobile headlamp optical system with different high beam distribution,and designs an intelligent automobile headlamp optical system.The main research contents of this paper include:Firstly,the ADB optical system is designed.According to the design requirements,suitable LED light sources are selected and distributed.Based on the imaging theory of aspheric lens,the lens set is designed by using optical software LucidShape,including internal lens and external lens.The processed optical elements are simulated in LucidShape,and the parameters of single optical lens and the coordination between the lenses are optimized and adjusted according to the simulation results.Then the road distribution can be analyzed and the road motion map can be simulated by LucidDrive.The final simulation results can meet the corresponding regulations.Secondly,the projective optical system is selected to fulfill the design requirements when designing the low beam optical system.It includes selecting suitable LED light source,designing composite ellipsoid reflector,shield and lens.On the surface of the lens,the microstructural pillows are designed by LucidShape and CATIA to meet the requirements of gradient values of the cut-off line.Finally,the designed optical elements are simulated and checked in LucidShape after data processing,and the parameters are optimized and adjusted.The final simulation results meet the test points and areas of regulation.Thirdly,sample lamp is tested and checked to see if the actual light distribution is consistent with the design.When the light sources of the ADB module of the sample lamp is fully working,the luminous flux and maximum illumination can reach more than 70% of the simulation results,which meets the requirements of high beam light distribution.Through the corresponding electronic control,the ADB module can realize the function of actively adjusting the high beam,which can avoid other road users from dazzling by the improper use of the high beam.The maximum illuminance value of the the low beam module scanning results is 33.5lx,which reaches 74.3% of the simulation results.It has a relatively clear cut-off line.It meets the requirements of the regulation GB 25991-2010 for each test point and test area,and verifies the feasibility of the design idea and method.