基于ARM的汽车四轮定系统的研究.docVIP

论 文 题 目：基于ARM的汽车四轮定位系统的研究 论文英文题目：Research on Wheel Alignment System Based on ARM 学位论文原创性声明 本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果： 摘要 Abstract In China, car wheel alignment is in its stage of developing period. Many factories are OEMs (Original Equipment Manufacture) or cooperators, even stealing technology from companies aboard. At home, Less than five factories can design their own production. The four-wheel alignment device based on PSD takes up the main market in China. These used CCD technology takes up only a small market, as well as few factories that own this technology. According to survey, as to host machine, all factories home and aboard adopt PC to be host machine, which causes the wheel alignment system takes up large place. According to the current development of wheel alignment system, a new wheel alignment system based on ARM is designed, including technology of CCD, MMA, infrared communication and embedded technology in ARM supported by Linux and QT. The system is registered with self-owned intellectual property rights. With the successful application of embedded technology in this system, it will direct the future development of car wheel alignments and it will make great contribution to the safety of car industry. Key words: for-wheel alignment, Bluetooth, CCD, MMA6260Q 目 录1 绪论 1 1.1 汽车四轮定位的必要性 1 1.2 四轮定位仪产品市场发展现状 1 1.3 课题研究的意义 3 1.4 研究目标、研究内容和拟解决的关键问题 4 2 汽车车轮定位参数检测理论 4 2.1 车轮主要定位参数及其作用 4 2.1.1 车轮外倾角 4 2.1.2 主销后倾角 5 2.1.3 主销内倾角 6 2.1.4 车轮前束 6 2.1.5 推力角 7 2.1.6 包容角 7 2.1.7 退缩角 7 2.2 车轮定位参数的测量原理 8 2.2.1 车轮前束和推力角的测量原理 8 2.2.2 主销倾角的测量原理 9 2.2.3 车轮定位参数的数学模型 10 3 系统总体方案 15 3.1 硬件系统 15 3.2 软件系统 15 4 测量系统的下位机硬件系统 17 4.1 处理器介绍 17 4.2 系统电源和开关控制电路 19 4.3 无线红外通信电路 21 4.4 CCD电路 22 4.3.1 光电传感器的选型 22 4.3.2 TCD1501D结构和工作原理 24 4.3.3 时序要求 25 4.3.4 驱动参数分析 26 4.3.5 CCD驱动模块 28 4.3.6 红外光源与光学系统 29 4.5 CCD视频信号处理 29 4.5.1 模拟信号预处理 31 4.5.2 模拟信号二值化处理 32 4.6 倾角测量系统 32 4.6.3 传感器的温度补偿 36 5 测量系统下位机软件结构 38 5.1 主程序结构 38 5.2 红外通信软件结构 38 5.