| With the development of information technology, acquiring and processing real-time field data have become an important part of modern industrial control and scientific research. Micro-computer data acquisition system, also as embedded data acquisition system, with the advantage of high sampling frequency and fast processing speed, has a particularly prominent development.Firstly, this paper introduces research background and significance of the subject, describes domestic and foreign development status of micro-computer data acquisition system, and proposes a data acquisition system design based on S3C2440A with ARM9 core for the needs. On this basis, the paper analyzes the characteristics of the system and proposes an overall design and planning.Secondly, the data acquisition system does a detailed design of hardware and software development platform based on the overall planning. Hardware development platform selects high-speed micro-controller S3C2440A as its CPU, whose external interface circuit is designd to achieve the 8-channel analog signal acquisition and sampling frequency up to 100KSPS. Software design adopts real-time operating systemμC/OS-Ⅱand graphical user interfaceμC/GUI to enhance the system's real-time and friendly interactive features. The whole system can realize dynamically display of the waveform and parameter measurement. Because the hardware and software both adopt modular design, the system is hierarchical structured to ensure that the whole system has good portability and maintainability.Finally, the paper makes a test of the overall system performance, and the results show that the system meets the functional requirements and performance requirements of data acquisition system. After the main text completed, the paper summarizes the work done and prospects the further work. |
