Proteus汽车自适应控制的LED前车灯照明系统设计
关键词 前照灯 自适应 LED 光电设计
毕业论文设计说明书（论文）外文摘要
Title The design of Adaptive control with the automotive LED front-lighting system
Abstract
At present the Lighting Patterns of automobile headlamps system are monotonous that cannot provide appropriate lighting with the change of surrounding environment. In view of the above problem, This paper is researching with the design of the LED automotive front-lighting system (AFS) based on adaptive control .Based on some technical requirements and functions of the adaptive control, the design of the overall plan and electro-optical system is studied in this paper, including LED drive circuit, voltage conversion circuit, the dimming circuit, adaptive control circuit, etc. At the same time， hardware circuit and software algorithm have been designed, and the simulation to the simplified version of the concrete implementation has carried on in the co-simulation of Proteus and Keil environment. The safety and comfort of driving have been greatly improved. At the same time, choosing the LED as the light source of automobile headlamps, also conforms to the trend of the development of the automobile energy saving and environmental protection.
Keywords Front-lighting Adaptive LED Electro-optical design
目 次
1 绪论 1
1.1 国内外汽车照明的发展现状 1
1.2 目前汽车照明的问题与缺点 1
2 汽车前照灯的技术要求及标准 3
2.1 汽车前照灯的照明技术要求 3
2.2 汽车前照灯的电气安全及其它要求 5
3 LED芯片的技术参数和驱动电路技术 6
3.1 LED芯片的电学特性 6
3.1.1 I-U特性 6
3.1.2 C-U特性 7
3.1.3 允许功耗 8
3.1.4 响应时间 8
3.2 LED芯片的光学特性 9
3.3 LED芯片的热学特性 9
3.4 LED芯片的驱动电路技术 9
3.4.1 LED采用串联方式 9
3.4.2 LED采用并联方式 10
3.4.3 LED采用混联方式 11
3.4.4 LED采用交叉阵列方式 12
4 自适应前车灯照明系统的总体方案设计 13
4.1 自适应前车灯照明系统的原理 13
4.2 自适应前车灯照明系统的基本功能 13
4.3 自适应前车灯照明系统的分类 14
4.4 自适应前车灯照明系统的总体方案 14
5 自适应前车灯照明系统的光电系统设计 16
5.1 光源的选择与LED技术 16
5.1.1 光源的选择 16
5.1.2 LED近光灯的光学设计 17
5.1.3 LED的基板设计 19
5.1.4 LED的散热设计 20
5.2 LED驱动电路的设计 20
5.2.1 LED驱动电路的要求与基本类型 20
5.2.2 自适应前车灯照明系统的LED驱动电路的设计 23
5.3 电源适配器的设计 23
6 自适应前车灯照明系统的光电系统设计 24
6.1 光强控制与调节电路 24