A Research Of Heart Sound Dentification System Based On LabVIEW

The virtual instrument can be combined with computer hardware and software resourceseffectively, make the strong function of the computer to play well, and become more convenient andintuitive in signal analysis, data processing and graphics display. Therefore, virtual instrument hasbecome a developing most rapidly field of automation test system instrument.The paper, based on LabVIEW2012, designs, and achieves a heart sound identification system.The system includes three main modules: signal collection, data processing and identification. Heartsound acquisition module collects heart sound and denoises, using self-made sensors; Dataprocessing completes heart sound feature extraction and establisshs heart sound characteristicdatabase; The identification module adopts two kinds of algorithm for classification of heart soundrecognition feature data, and use the decision level fusion algorithm to improve the recognition rate.Based on the spectral characteristics of heart sound signals of s1, s2and virtual instrument, thepaper puts forward the feature extraction algorithmcalled a low frequency enhanced Mel cepstralcoefficients and the frequency division coefficient, focuses on the analysis of the vector Euclideandistance and the minimum distance classification method. The results of practical application showthat the system has friendly interface, convenient operation, fast operation speed, high identificationefficiency, have certain application value.