Sound Signal Acquisition And Analysis System Based On LabVIEW

With the emergence of virtual instruments,the development of instruments has started a major reform,which has a great impact on the development of different fields of technology.Therefore,applying the virtual instrument technology to the signal analysis and other fields has practical significance.Based on LabVIEW,through the USB data acquisition card,design the signal acquisition and analysis system,this system includes signal acquisition,virtual oscilloscope and signal analysis.Among them,the signal acquisition part is based on the LabVIEW2015,combined with PC,USB data acquisition card and voice sensor,to achieve the design of signal acquisition.The virtual oscilloscope completes the waveform display of the signal.Based on the LabVIEW2015,the virtual oscilloscope system is designed.On the basis of signal time-domain analysis and frequency domain analysis method,the software structure of signal analysis is designed,and the simulation analysis of periodic signal is realized by the LabVIEW2015.Time domain analysis of instantaneous signal can be obtained at any time value,minimum,maximum,average,frequency domain analysis can obtain the intensity information of the frequency components.Based on the LabVIEW2015 and the USB data acquisition card,using the modular design method,design the signal acquisition and analysis system,realizing the design of the signal acquisition system,the virtual oscilloscope and signal analysis system,and complete the signal acquisition,waveform display,storage filtering,parameter measurement,signal spectrum analysis.