Digital phasemeter based on virtual instrument technology

This article introduced the conception and structure of virtual instrument and presented a new kind of digital phasemeter based on virtual instrument technology.It also introduced the design of hardware and software and the function of all modules.The modules included main control,data acquisition,interface,function-realizing,and assistant function.Meanwhile,the theory of measuring phase difference was discussed in detail,and the results of experiment were given.Finally,the error of the experimental results was analyzed.