μCOSⅡ嵌入式数据采集系统设计

The design of embedded data acquisition system based on μCOSⅡ

针对以往的数据采集系统实时性差数据传输率低的问题,设计利用操作系统μCOSⅡ高实时性和USB数据传输高效性,构建了基于μCOSⅡ和USB2.0的数据采集系统。系统由信号预处理单元、AD转换单元、数据传输单元、LCD显示单元等组成。通过输入特定的模拟信号,得出了系统的性能参数。经过多次实验,数据表明:该数据采集系统可实现最大工作频率为110KHZ采样频率转换精度为0.08v的现场模拟信号的采集。

Aiming at resolving poor real-time problem and low data transfer rate of the data acquisition systems, this data acquisition system has been designed which based on USB2.0 and μCOSⅡ. High realtime operating system μCOSⅡ and highly effective USB2.0 controller have used in this design. The system is consisted by signal processing unit, AD conversion unit, Data transmission unit, LCD display unit and so forth. By entering the specific analog signal, the system performance parameters are concluded. After several testings, it indicates that the data acquisition system allows maximum 110 KHZ operating frequency and 0.08 v conversion accuracy.