基于网络的虚拟测试仪器的设计

Design of Virtual Test Instruments Based on Networks

利用网络互连技术和虚拟仪器技术,研制了用于高校实验室的虚拟测试仪器。虚拟测试仪器系统 可单独使用,也可用于实验室中的局域网内,可分前端机、测试服务器和客户机部分。前端机和测试服 务器通过实时网络通讯Client／Server方式进行数据传输,测试服务器和客户机通过Browser／Server模式 连接。前端机基于DOS平台,专门负责电路控制、信号采集和标准信号的形成工作;测试服务器基于 Windows平台,专门负责信号的分析、处理、发布和存盘。

A virtual test instrument used in university laboratories is developed by using the techniques of network connection and virtual instrument. The virtual instrument system can be used independently,and also in the local networks of laboratories,which can be divided into terminal machine,test server and client machine. Data communication is implemented for the terminal machine and test server through Client/Server mode, the connection for the test server and client machine is implemented by using Browser/Server mode. The terminal machine is especially used for circuit control, signal acquisition and creation of standard signals based on DOS,the test server is used especially for signal analysis,process and release and save.