一种工业热电阻检定系统的设计

摘要

为实现对工业热电阻的自动检定,提高检定工作效率及量值传递的准确性,设计了一种工业热电阻自动检定系统.根据热电阻检定工作原理和实现自动检定的思想,论述了系统的硬件结构组成和检定系统操作步骤.系统采用测温电桥与低电势扫描开关配合,在工业三线铂电阻的检定中,可以实现二线接法和三线接法的自动转换.系统操作软件以VB作为开发平台,实现自动控温、采集数据和输出word报表等.实际使用表明,系统设计结构合理,软件操作方便,量值传递准确可靠.%In order to realize automatic verification of industrial thermal resistance and improve test efficiency and accuracy of value transfer, an industrial thermal resistance automatic verification system is designed. According to the thermal resistance verification principle and idea of automatic verification, the system hardware structure and the operation steps of calibrating system are described. System uses the temperature measuring bridge and low potential scan switch, the automatic conversion of line connection method from two to three can be realized in industrial plalinum resistance verification. As a development platform, VB is used to achieve automatic temperature control, data acquisition and output word statements in operating system software. The practical application shows that the system has the advantages of reasonable structure, convenient software operation, accurate and reliable value transfer.