基于USB的数据采集系统的研究与开发

Development of Data Acquisition System based on USB

随着技术的发展与多领域用户的需求,单一的采集设备已经不能满足数据采集系统的需求。为了解决原来依靠独立的硬件来实现运算与分析功能模块的复杂性问题,通用串行总线(USB)发挥了自身独特的优势基于USB的传输优势和现场可编程门阵列(FPGA)的高效性能,将采集到的模拟信号经模数转换后由FPGA处理控制数据,通过USB控制接口将数字信号传输到上位机,用户通过上位机对采集到的数据进行处理,实现如控制采集、滨取数据、存储数据和转换数据等功能。围绕设计目标,从整体方案、芯片选择、控制传输软件的设计、基于USB实时数据采集软件设计,及其上位机的界面设计等方面阐述了主要的设计研究工作。

With the advances of technologies and the demands from users in various fields, a single acquisition device can no longer meet the requirements of a data acquisition system. The unique advantages of USB can be used to solve the problem of complexity that caused by only relying on independent hardware to implement the functional modules of computation and analysis. With the transmission advantage of USB and the efficient performance of FPGA, the analog signal collected can be processed and controlled by FPGA after analog to digital conversion. The data signal is transferred to the host computer via the USB control interface, where the users can process the collected data and implement various functions such as collection control and data reading, storage and conversion. The main design and research work is presented in terms of the overall program, selection of chips, design of transmission control software, design of real-time data acquisition software based on USB and the interface design of the host computer.