基于内存映射文件的虚拟仪器设计

Virtual instrument design based on MVF

通过对LabVIWW软件中Chart控件的分析,指出其在实时、连续测量数据时的不足。提出了基于内存映射文件技术的虚拟仪器设计思想,给出了内存映射文件核心函数动态链接库的封装和调用方法。实例分析表明,在相同条件下,基于内存映射文件技术的虚拟仪器使系统虚拟内存的消耗减少97%,从而极大地提高了程序的响应速度,降低了虚拟仪器软件对系统硬件配置的要求。

Through analyzing the chart node in LabVIEW, its shortcomings in real-time continuous measurement are pointed out. The virtual instrument design idea based on MVF technology is presented. The packaging and calling methods of MVF core functions are given. Application example shows that the virtual instrument design based on MVF technology reduces the virtual memory usage by 97%, greatly shortens the response time of software and decreases the requirement to system hardware configuration.