Heart sound localization method, system, device and computer readable storage medium

By combining PPG and PCG signals and using the time point of the trough position of the PPG signal to constrain heart sound localization, the robustness and accuracy problems of heart sound localization methods when signal quality deteriorates are solved, and high-precision heart sound localization is achieved in complex physiological environments.

CN122096733APending Publication Date: 2026-05-29SOUTHEAST UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Filing Date
2026-01-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing heart sound localization methods suffer from low robustness and accuracy when signal quality deteriorates or auxiliary information is lacking, resulting in high localization deviation and false detection rates, making them difficult to apply in real-world scenarios.

Method used

Heart sound localization is achieved by combining PPG and PCG signals. The target time window is determined by the trough position of the PPG signal, and the peak time point of the PCG envelope is identified as the heart sound localization result. The physiological characteristics of the PPG signal constrain the heart sound localization process and reduce noise interference.

Benefits of technology

It improves the accuracy and robustness of heart sound localization, especially maintaining high localization accuracy even when the heart sound signal quality degrades, and significantly reduces localization offset and false detection.

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Abstract

The application discloses a heart sound positioning method, system, device and computer readable storage medium, and relates to the technical field of physiological signal processing. The method comprises the following steps: acquiring a PPG signal and a PCG signal collected, performing envelope extraction on the PCG signal to obtain a PCG envelope line; identifying a wave trough position time point of the PPG signal, determining a target time window based on the wave trough position time point, wherein the target time window comprises a first target time window and / or a second target time window, the first target time window is a time window before the wave trough position time point, and the second target time window is a time window containing the wave trough position time point or after the wave trough position time point; identifying a peak time point of the PCG envelope line in the target time window, and determining the peak time point as a heart sound positioning result for the PCG signal. The application improves the robustness and accuracy of heart sound positioning.
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