Design And Implementation Of Virtual And Actual Combined Experiment Platform Based On LabVIEW

In the teaching system of modern colleges and universities,especially science and engineering colleges,experimental teaching is a very important teaching link,which is a useful supplement to classroom theoretical teaching,and has been widely used in basic and professional courses,so that students can verify theoretical knowledge and improve their practical ability.In the experiment teaching of electronic information course in most colleges and universities,the experiment mode is based on the traditional hardware solid experiment based on the actual circuit,and there are also some virtual experiment modes based on software simulation.However,the hardware experiment is greatly influenced by the experimental equipment and experimental environment,sometimes it can not get good experimental teaching effect.However,the full use of software simulation experiment to replace the hardware experiment can not let the students touch the hardware equipment,and can not process the actual signal,which will lead to the students' lack of intuitive understanding of the actual hardware circuit equipment and the actual signal.In order to improve the current situation of experimental teaching in Colleges and Universities,a virtual and actual combined experiment platform based on Lab VIEW is proposed in this paper.The platform uses LabVIEW as the software development platform,uses NI-DAQmx driver software to drive NI USB-6353 data acquisition card,and realizes the actual signal acquisition and output through data acquisition card and external hardware.The experimental platform adopts the modular programming idea,divides the platform into modules according to the requirements and functions,and designs each module.The user function module is divided into user login module and user management module.The experimental function module is divided into the actual signal acquisition module,the actual signal output module,the simulation signal generation module,the data processing and analysis module and the experimental results saving module.In this paper,several digital signal processing and digital circuit pure virtual and virtual real combination experiments are implemented,including discrete-time signal operation experiment,judgment system stability experiment,Fourier transform experiment,digital filter experiment,signal spectrum analysis experiment,decoder experiment and A/D converter experiment.Each experimental project is composed of experimental functional modules,which can design new experimental project use the same method and the same functional modules.Finally,the network publishing function of the experimental platform is realized.