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Heart sound location segmenting method suitable for Android system

A heart sound and heart sound envelope technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as poor real-time and portability, and achieve simplified detection process, simplified calculation and extraction process, and good robustness. sexual effect

Active Publication Date: 2014-07-30
绍兴兰韵医疗器械科技有限公司
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AI Technical Summary

Problems solved by technology

These methods have achieved good results in heart sound segmentation, and have broadened the research ideas of heart sound segmentation, but they all rely on computers with powerful computing capabilities and complex structures to perform heart sound segmentation, and the real-time and portability of the system poor

Method used

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  • Heart sound location segmenting method suitable for Android system
  • Heart sound location segmenting method suitable for Android system
  • Heart sound location segmenting method suitable for Android system

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0043] as attached figure 1 Shown is a block diagram of the system hardware structure. The main components of the lower computer module include a dynamic microphone, an audio amplifier circuit, a filter circuit, a DSPIC main control circuit, an A / D conversion circuit, a Bluetooth transmission circuit, and a power supply circuit.

[0044] The dynamic microphone completes the collection of heart sound signals. The collected heart sound signal passes through the audio amplifier circuit to complete the heart sound signal amplification process. as attached figure 2 Shown is the circuit schematic diagram of the audio amplifier circuit, and its main component is NE5532. NE5532 is a low-noise dual-op-amp high-performance integrated circuit with good noise performance. The audio amplifier circuit designed by the present invention is composed of two ...

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Abstract

The invention relates to a heart sound location segmenting method suitable for an Android system. The heart sound location segmenting method suitable for the Android system comprises the following steps of firstly carrying out pre-processing on a heart sound signal, which mainly consists of mean-removal normalization and resampling of hear sounds; secondly determining the order number of high-order Shannon entropies, and extracting envelope of the heart sounds by utilizing the high-order Shannon entropies; thirdly configuring a sliding window, determining an upper threshold and a lower threshold of the envelope of the heart sounds, restraining the influence of noise and interference on segmentation by utilizing the upper threshold, carrying out the detection on the demarcation point of the heart sounds by utilizing the lower threshold, and carrying out initial location on the demarcation point; finally correcting the demarcation point after being subjected to the initial location, eliminating the influence of the interference according to medical physiological information of the heart sounds, judging whether possible splitting of the heart sounds exists or not, and carrying out the combination of the heart sounds if determining that the splitting of the hear sound exists. According to the heart sound location segmenting method suitable for the Android system, the computation and extract processes of the envelop of the heart sounds are simplified, and excellent robustness on the noise and the heart murmur is provided; the accuracy of segmentation is relatively high.

Description

technical field [0001] The invention belongs to the technical field of heart sound signal processing and transmission, and relates to a heart sound localization and segmentation method applied to an Android system. Background technique [0002] As one of the most important physiological signals in the human body, the heart sound signal can reflect the movement status of the heart and cardiovascular system, and contains information about the physiological state of each part of the heart. Many documents at home and abroad have proved that heart sounds can be used in the field of biometrics and can also be used in the analysis of heart movement, which makes heart sound signal processing increasingly important. Since heart sounds are quasi-periodic, analyzing heart sound signals in units of cardiac cycles is often the premise and key to heart sound processing. [0003] As the basis of heart sound analysis, heart sound segmentation can divide a complete cycle of heart sound into...

Claims

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Application Information

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IPC IPC(8): A61B7/04G06F19/00
Inventor 赵治栋李静佳张晓红何圣康
Owner 绍兴兰韵医疗器械科技有限公司
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