基于DLL的Labview数据采集系统

Design of DLL-based Labview Data Acquisition System

Labview是一个高效的图形化程序设计环境,在测试、测量及工业控制中有广泛的应用,但所有的采集卡必须有NI(NationalInstruments)公司提供的驱动程序,大大的限制了用户的选择。分析Labview调用外部代码的方法,介绍Labview平台下调用DLL驱动国产数据采集卡的关键技术及其方法,用VC++编制动态连接库实现采集卡采集数据,并结合实际工程制作DLL驱动程序。

Labview, a Virtual Instrument development platform, is a high efficiency graphical platform with extensive application in measuring, testing and industrial control. But DAQ (Data Acquisition) card needs the driver program provided by NI (National Instruments) Company, thus the choice of customers are greatly limited. This article analyzes the method of transferring exterior code into Labview, introduces the key technique and method of transferring DLL to drive domestic DAQ board on Labview platform, making DLL with VC++ to acquire data from DAQ board and making practical DLL program.