基于串行通信的主从式虚拟仪器技术

Master-slave Structured Virtual Instrument Based on Serial Communication

目前的虚拟仪器系统开发多以美国 NI公司 L ab View和 L ab Windows/ CVI为开发平台和数据采集卡。这里介绍的一个主从式虚拟仪器系统 ,其软件和硬件都摆脱了 NI开发环境的限制 ,具有更大的开放性和扩展空间。该系统利用基于单片机的数据采集器 ,通过 RS- 2 32串口与 PC进行信息传送 ,插拔方便。安装在 PC机中的数据处理软件对数据进行处理和分析。

At present most Vitual Instrument Systems are developed based on LabView and LabWindows/CVI produced by NI and In those systems Data Acquisition Cards of NI are used. This paper introduces a virtual instrument system with a master slave structure.The hardware and software of this system break away from the restriction of NI developing enviorment, so it is more open and more easy to expand. This system includes a data sampler based on microcontroller and a PC which communicate through RS 232 serial port. Data is processed by the data processing software installed on the PC.Users can control the data sampler through the virtual control panel on the PC.