Design of a Wearable Flexible Nano-Heart Sound Sensor Based on P(VDF-TrFE)/ZnO/GR and Its Application in Cardiac Disease Detection

Submitting author affiliation:
Hangzhou Dianzi University, Qiantang District, Hangzhou City, China

Beilstein Arch. 2023, 202322.

Published 30 May 2023

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This paper proposes a method for preparing flexible composite piezoelectric nanofilms of P(VDF-TrFE)/ZnO/Graphene (GR) using the high-pressure electrospinning method. The composition and β-phase content of the piezoelectric composite films were analyzed using X-ray diffraction (XRD) patterns. The morphology of the composite film fibers was observed through scanning electron microscope (SEM) images. Finally, the P(VDF-TrFE)/ZnO/GR piezoelectric composite film was encapsulated in a sandwich structure heart sound sensor, and a visual heart sound acquisition and classification system was designed using LabVIEW. A heart sound classification model was trained based on the fine K-Nearest-Neighbor (KNN) classification algorithm to predict whether the collected heart sounds are normal or abnormal. The heart sound detection system designed in this paper can collect heart sound signals in real-time and predict whether the heart sounds are normal or abnormal, providing a new solution for the diagnosis of heart disease.

Keywords: composite piezoelectric nanofilm; heart sound sensor; heart sound stethoscope; electrospinning; Heart sound classification algorithm

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Luo, Y.; Liu, J.; Zhang, J.; Xiao, Y.; Wu, Y.; Zhao, Z. Beilstein Arch. 2023, 202322. doi:10.3762/bxiv.2023.22.v1

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