基于LabVIEW的燃烧热测定的化学虚拟仪器

Chemical Virtual Instrument of Combustion Heat Determination based on LabVIEW

通过利用SWC精密数字温度温差仪的串行接口及LabVIEW强大的数据采集和处理功能,编制了界面友好、操作简便、自动化程度高的燃烧热测定化学虚拟仪器.文中在介绍解决系统设计关键问题的基础上,重点研讨了将Speil公式处理差热分析实验数据的思想应用于燃烧热实验数据处理的可行性;通过对Speil公式进行适当的合理改进,并结合Matlab用于数值微分的diff函数以及LabVIEW中用于数值积分的Numeric Integration.vi节点,实现了燃烧热的计算机精确计算.利用该系统进行燃烧热测定实验,获得了满意的结果.

Working out virtual instrument of combustion heat with the serial interface of SWC type temperature difference / temperature instrument and function of LabVIEW＇s data acquisition and processing, which has many advantages, such as friendly interface, simple operation and altitudinal automatization. Based on introducing how to resolve sixty-four-dollar question in system designing, entering into feasibility of speil formula＇s idea applied to the combustion heat determining experiment. Then through combined the function of diff in Matlab and Numeric Integration node in LabVIEW with rational improving on Speil formula, it has come true that combustion heat calculated accurately by computer. And the system was used to determine combustion heat with a satisfactory result.