导　　师： 李春茂

学科专业： 080805

授予学位： 硕士

作　　者： ;

机构地区： 华南理工大学

摘　　要： 随着汽车产业的发展,车载信息娱乐系统已成为整车差异化的一个关键点。汽车不仅作为代步工具,而且已经成为现代消费者不可或缺的“移动办公室”和“移动家庭影院”。人们对汽车多媒体功能要求越来越多,对其品质要求越来越高,汽车信息、娱乐、控制等全方位的整合需求已愈来愈凸显。根据市场的需求趋势,本课题主要研究和构建了多功能车载信息娱乐系统平台,为汽车消费者提供优质的视听系统及导航和辅助驾驶服务。 本文首先分析了车载信息娱乐系统发展背景及现状和人们对其具备的需求和期盼,讨论了当前嵌入式系统实现功能整合的综合性解决方案;然后面向高端应用,基于IMX35研究设计了一个具备GPS导航、高品质多媒体播放、实时车身信息处理和无线通讯等功能的完整高端车载信息娱乐系统平台。硬件平台设计是本文的重点。继而从芯片选型到电路设计详细论述了系统CPU模块、音视频、总线网络等主要功能部分的硬件设计。由于系统涉及到高速电路、射频电路及数模混合电路,本文对高速数字电路的信号完整性反射、串扰和时序三大问题进行了详细的理论分析,采用hyperlynx对系统进行布线前仿真,并计算了本系统MDDR时序。最后提出PCB设计的一般准则,讨论了高速电路、射频电路及数模混合电路PCB设计要点,最终成功设计出相应PCB,给出了设计版图。 With the development of the automotive industry, Car infotainment systems have become a key difference for cars. They are not only as a means of transport tools, but also become the indispensable“mobile office”and“mobile home theater”to the modern consumer . With more and more multimedia functions and More and more high-quality are required, car information, entertainment, control etc., a full range of integration requirements have been increasingly highlighted. According to trends of the market demand , the paper a multi-functions infotainment platform with high-quality audio-visual systems and navigation was mainly researched in the paper to assist to drive automotive for consumers. First, the paper analyzed the development background and current situation of car infotainment system and people's needs and expectations to it, discussed integrated solutions that the current embedded system achieve functional integration; and for high-end applications, based on IMX35 a complete platform for high-end automotive infotainment system was designed with GPS navigation, high-quality multimedia player, real-time vehicle information processing and wireless communication function and so on. This article is mainly focus on the hardware platform design. Following the hardware design the main function of the system including CPU module, audio and video, the bus network, was discussed in detail from the chip selection to the circuit design. Because the system involves the high-speed circuits, RF circuits and digital-analog hybrid circuit, reflection, crosstalk and timing which is three major issues of high-speed digital circuit signal integrity were analyzed on theory detailedly, and pre-layout simulation for the system routing was performed, and the MDDR timing of this system were calculated. Finally, the general guidelines of the PCB design was proposed and the key point of PCB design of high-speed circuit, RF circuit and digital-analog hybrid circuit was discussed, the PCB design of corresponding part of the system was designed successfully, the layout was given.

关 键 词： 车载信息娱乐系统 信号完整性 时序

分 类 号： [U463.6]

领　　域： [机械工程] [交通运输工程] [交通运输工程]