车载多功能前屏系统的研究与实现

发布时间：2019-03-01 18:29

【摘要】：随着现代汽车在绿色节能、娱乐性、智能化、安全舒适等方面要求不断提高，使得车身电子系统越来越复杂，乘用车驾驶室中车载电子、电器和仪表设备多且安装分立，占用空间大，显示精度低，可读性差不利于驾驶员观察和操作，给行车安全带来隐患。本文针对上述状况，以车载多功能GUI显示前屏为背景开展研究，采用内核为Arm920T的嵌入式处理器S3C2440A为控制核心，以群创7寸TFT-LCD为触摸显示屏，在Linux2.6.34和Qt4.6开发平台上，实现了集车辆行驶信息GUI显示、电子地图以及车载信息媒体播放等功能于一体的前屏显示系统。完成了系统软件、硬件设计及样机的制作和实验。本课题研究主要解决了以下关键技术：基于ARM920T处理器车载多功能前屏硬件设计与实现；Linux2.6.34和Qt4.6在S3C2440A处理器上的移植；基于Qt4.6车载多功能前屏软件的设计与实现；车载多功能前屏系统快速启动的优化设计。最后，，在系统样机平台上进行了车身信息采集、视频播放、电子地图显示的测试实验。实验结果表明，前屏系统能够图形化实时显示车速和行驶里程、发动机转速、油量、水温、方向灯指示和时间日期等车辆行驶参数，以mapinfo格式显示电子地图，并实现大多数格式媒体文件的播放与显示。具有界面友好、反应灵敏、体积小、成本低和可扩展性强等特点，达到课题的设计目标。同时，本系统还为接入车身电子系统做了充分准备，预留了CAN、USB、IIS、SPI、RS-232等接口，为下一步的项目车身现场测试、产品化开发奠定了基础。
[Abstract]:With the increasing requirements of modern cars in green energy-saving, entertainment, intelligence, safety and comfort, the body electronic system is becoming more and more complex, and there are more and more on-board electronics, electrical appliances and instrumentation equipment installed separately in the cab of passenger cars. Large footprint, low display accuracy and poor readability are not conducive to driver observation and operation, and bring hidden danger to driving safety. In view of the above situation, this paper takes the vehicle-borne multi-function GUI display front screen as the background, uses the embedded processor S3C2440A with Arm920T as the control core, and group creation 7-inch TFT-LCD as the touch display screen, and uses the embedded processor S3C2440A as the control core. On the development platform of Linux2.6.34 and Qt4.6, a front screen display system is realized, which integrates the functions of GUI display, electronic map and on-board information media playing. The software and hardware design of the system and the manufacture and experiment of the prototype are completed. This paper mainly solves the following key technologies: hardware design and implementation of multi-function front screen based on ARM920T processor, transplantation of Linux2.6.34 and Qt4.6 on S3C2440A processor, and so on. The design and realization of vehicle multi-function front screen software based on Qt4.6 and the optimization design of fast start-up of vehicle multi-function front screen system. Finally, the test experiments of body information acquisition, video playback and electronic map display are carried out on the prototype platform. The experimental results show that the front screen system can display the driving parameters of vehicles such as speed and mileage, engine speed, fuel quantity, water temperature, direction lamp indication and time date in real time, and display electronic map in mapinfo format. And the realization of most format media file playback and display. It has the characteristics of friendly interface, sensitive response, small size, low cost and strong expansibility, reaching the design goal of the project. At the same time, the system is also fully prepared for the connection to the car body electronic system, reserved CAN,USB,IIS,SPI,RS-232 and other interfaces, and laid a foundation for the next step of the project body field test and product development.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U463.6;TP368.1

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