基于LabVIEW的数字万用表设计与实现

针对舰艇导航装备虚拟检测系统对可集成、可存档数字万用表的需求，采用LabVIEW编程语言和NI PXI-4070为软、硬件平台，对导航装备虚拟检测系统数字万用表功能原理进行了研究，确定了数字万用表的功能模型，设计了其硬件结构，编写了相应软件程序的前面板和程序框图，实现了交流、直流、电阻和频率测量、量程自动选择、测量结果自动存档等功能。通过对数字万用表各项技术指标的测试和分析，结果表明，该数字万用表运行可靠、性能良好，满足舰艇导航装备虚拟检测系统测量要求。

Design and Realization of Digital Multimeter Based on LabVIEW

For the demand of digital mutimeter which is integratable and archivable in virtual detecting system of navigation equipment on naval ship, LabVIEW programming language and NI PXI-4070 was adopted as the software and hardware platform. The digital multimeter functional theory of virtual detecting system was studied. Then the function model was determined and the hardware structure was designed. The front panel and flow chart is designed. All kinds of functions are realized such as measurement of alternating current, direct current and resistance, selection range automatically and Auto Archive of measurement result and so on. Through test and analysis of technical index, it turned out that the digital multimeter works well with good performance and meets the demand of virtual detecting system of navigation equipment on naval ship.