Design of signal analysis instrument based on LabWindows/CVI

In order to overcome the relative single function of current signal analysis instrument,and inconvenience use,a USB bus data transmission signal analysis instrument has been developed on LabWindows/CVI virtual instrument software development platform,to achieve a real-time signal acquisition,time domain analysis and frequency domain analysis.The scheme of virtual signal analysis instrument using the Windows's multi threading technology,allocated the signal acquisition,signal analysis and human-computer interface to independent threads,shortened the time of respond to user operation and increased the system's efficency,and the ADO technology was used to create and access database of test results.Finally,time-domain waveform display of the signal analysis instrument was calibrated and analyzed.The results can satisfy the performance requirements of universal osciioscopes,can meet the requirements of the day-to-day work of the signal acquisition,analysis requirements.