用VxD实现工业数控设备高精度数据采集

High Precision Data Acquisition by Using VxD in Industrial NC Facility

介绍了用A/D转换卡进行硬件I/O编程实现,基于Windows9x平台下使用VToolsD工具开发VxD虚拟设备驱动程序,上位机则实现人机交互功能,从而实现高精度实时、数据采集。并给出了工程项目中编制的程序框架,介绍了VxD程序的通信方式和编制方法。

Introduced the high-precision and real-time data acquisition in a new numerical device.Using VxD(Virtual x Device)in Windows 9x for the drive of the interface card could get this high precision of A/D conversion.And this technology was used in a new kind of computer control system of single action drawing press machine with multi-point-control hydraulic blank holder.It may be helpful to promote the research in the field of blank holder press machine control system.