具有USB主机功能的汽车参数采集系统的设计

Design on autos running parameter acquisition system based on USB host

为实现对汽车运行参数的测量和大量数据的存储,通过对通用串行总线通信协议的剖析,提出采用嵌入式USB主机作为核心,以移动硬盘为存储设备的运行参数采集系统.给出了设计此参数采集系统的原理、硬件电路结构,并编制了专用数据通信驱动程序和应用程序,实现了USB主机控制器部分数据的有效通讯和对汽车运行参数的高速数据采集、存储、显示和查询.

To realize the measure of automobile running parameters and the storage of mass acquired data, a new data acquisition system is designed by analyzing the protocol of Universal Serial Bus (USB) in this paper. It uses the embedded USB Host technology as the emphasis of the design, and uses USB movable disk as its memory device. This paper also gives the design principle, circuit structure, special data communication drivers and applied programs. This system implements the efficient data communication in the USB Host controller, the operations of data acquisition and the data transmission in high speed, and it can realize the function of data acquisition, memory, display and inquiry. The system can work efficiently under severe condition, and it also has excellent compatibility and expansibility because of the modularity design.