多媒体定时器在EIT数据采集精度评价中的应用

Application of Multimedia Timer in Evaluation of Precision of EIT Data Acquisition

目的:实现电阻抗断层成像(EIT)高精度数据采集系统性能评价软件中的数据快速采集和存储功能。方法:分析比较了Timer和多媒体2种Windows定时器,基于Visual C++分别编程实现了EIT数据采集系统性能评价软件并比较了结果。结果:2种定时器均可以完成对EIT数据的采集、显示、存放和简单处理功能,但是多媒体定时器的定时精度更高,能够更准确而有效地完成上述任务。结论:多媒体定时器稳定可靠,可以满足一般情况下的高精度定时要求。

Objective To realize fast data acquisition and storage in the performance evaluation software of high-precision data acquisition system of electrical impedance tomography（EIT）.Methods Two kinds of Windows timer were compared and the performance evaluation software of EIT data acquisition system was realized respectively based on Visual C＋＋.Results Both two timers were able to complete the tasks about EIT data,such as acquisition,display,storage and simple processing.However,multimedia timer,whose timing accuracy was higher,was able to complete all the above tasks precisely and effectively.Conclusion Multimedia timer is reliable and can meet the general requirements of high precision timing.