Method for acquiring heart sound signal source components

A signal source and heart sound technology, applied in stethoscope and other directions, can solve the problems of high risk and high difficulty

Inactive Publication Date: 2018-08-14
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] There are not many studies on the acquisition of the original components of the heart sound signal at home and abroad, but they can be divided into two categories: one is to directly insert the micro sensor into the heart to collect the heart sound. The original components of the heart sound are obtained; the second is to use the method of blind source separation or independent component analysis to obtain the original components of the heart sound, but only part of the original components of the heart sound can be obtained

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  • Method for acquiring heart sound signal source components
  • Method for acquiring heart sound signal source components
  • Method for acquiring heart sound signal source components

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Embodiment Construction

[0054] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0055] A heart sound is an acoustic signal produced when the heart valves and associated vascular system vibrate mechanically. The heart sound signal mainly includes the first heart sound S1 and the second heart sound S2, and the first heart sound S1 starts from the systolic period of the ventricle, mainly due to the closure of the atrioventricular valve.

[0056] Such as figure 1 As shown, S1 is mainly composed of four parts. The first part is produced by the first contraction of the ventricle and the process of accelerating blood flow to the atrium, which occurs before the closure of the atrioventricular valve; the second part is caused by the expansion of blood flow to the atrioventricular valve. The impact caused by the impact and the blood recoil to the ventricle; the third part comes from the vibration caused by the blood flow between the bottom of the large ar...

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Abstract

The invention discloses a method for acquiring heart sound signal source components. The method includes synchronously acquiring N channels of heart sound signals from multiple channels according to the 'time-sharing generation' characteristic of the heart sound signals, and carrying out denoising and segmentation processing on the heart sound signals; building mathematical models of transmissionprocedures of the heart sound signals in thoracic cavities; acquiring the heart sound signal source components on the basis of fourth-order cumulant algorithms. The method has the advantages that physiological information with the heart sound signals, heart sound generation location information and information of correlations between signals of the various channels can be acquired by the aid of the method; first heart sound S1 can be decomposed into four source components to be represented by the aid of the time-sharing generation characteristic of the heart sound signals, second heart sound S2 can be decomposed into two source components to be represented, accordingly, the heart sound signal source components with single components can be successfully acquired, and the method is favorablefor deeply analyzing, interpreting and classifying the heart sound signals and can be ultimately applied to clinical practice and further scientific research.

Description

technical field [0001] The invention relates to a method for acquiring heart sound signal source components, in particular to an acquisition method for acquiring heart sound signal source components by using synchronously collected four-channel heart sound. Background technique [0002] Heart sound signals carry important physiological information of human heart activity, such as heart rate, heart rhythm, movement and functional status of atria, ventricles and heart valves. With the advancement of science and technology, heart sound auscultation began to shift from traditional heart sound auscultation to intelligent heart sound auscultation. The so-called intelligent heart sound auscultation uses electronic equipment to convert heart sound signals into electrical signals for processing, and obtains and further analyzes heart sound signals from the perspective of "signals". Various features, so as to achieve the purpose of auscultation. The heart sound signal has extremely h...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B7/04
CPCA61B7/04
Inventor 成雨含佘辰俊黄健钟王鹏飞
Owner NANJING UNIV OF POSTS & TELECOMM
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