Network Monitoring And Control Based On Virtual Instrument Technology Research

The current trend of the measuring and control technology is to use virtual instrument measuring and controlling through network. This paper elaborates how to build the networked measuring and control system platform based on the products of National Instruments.The first chapter of this paper introduces the developing trend of the measuring and control technology and the main paradigm of this paper. The second chapter introduces the concept, characteristics, trend, sorts of virtual instrument and its software developing platforms. In the third chapter, the PXI bus , SCXI bus and the specialties of LabVIEW, an excellent virtual instrument software developing platform are introduced and the methods to build the harware platform and the sotware of a networked measuring and control system are described. Chapter 4 sums up the several means of LabVIEW to realize communication through network which are TCP or UDP communication, DataSocket, VI Server, Web Server and remote panels technology. Chapter 4 also interprets those means through some example programs proved to run in order on the network platform mentioned in this paper with the experience of the author in programming introduced. Chapter 5 compares the several ways by which LabVIEW can access database and illustrates a way proposed by the author of this paper in modifying the VIs in the free toolkit LabSQL to realize accessing the SQL 2000 Server in LAN. Chapter 6 interprets the improvement of the research conducted by the author of this paper.