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中国医疗器械杂志 2019, Vol. 43 Issue (5) :337-340    DOI: 10.3969/j.issn.1671-7104.2019.05.007
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基于MEMS MIC的心音检测装置的设计和实现
丁大禹1, 2,李庆2,董亚朋1, 2,王王莹2,杨波1, 2
1 物理场生物效应及仪器四川省高校重点实验室,成都市,610225
2 成都信息工程大学 电子工程学院,成都市,610225
Design and Implementation of Heart Sound Detection Device Based on MEMS MIC
DING Dayu1, 2, LI Qing2, DONG Yapeng1, 2, WANG WangYing2, YANG Bo1, 2
1 Key Laboratory of Biological Effects and Instruments of Sichuan Province, Chengdu, 610225
2 School of Electronic Engineering, Chengdu University of Information Technology, Chengdu, 610225

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摘要 该文阐述了如何研制出一种基于高增益MEMS MIC的数字化心音信号检测装置,其能够对人体心音进行准确的采集和存 储。根据前人采用传统听诊器采集心音的方法,该系统对传统听诊器进行改进,设计出配备MEMS麦克风传感器的复合 探头。MEMS麦克风传感器将声压信号转化为电压信号,并对采集到的信号进行放大、Σ△转换、抽取和滤波等处理。通 过蓝牙将心音信号上传到PC端,对其进行经验模态分解(EMD)重构信号,再借助独立成分分析(ICA)方法进行盲源 分离,最后通过自相关分析计算心率。文末对该系统的性能进行了初步的对比分析,并验证了所采心音信号的准确性。
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关键词高增益   心音信号   复合探头   经验模态分解     
Abstract: The paper describes how to develop a digital heart sound signal detection device based on high gain MEMS MIC that can accurately collect and store human heart sounds. According to the method of collecting heart sound signal by traditional stethoscope, the system improves the traditional stethoscope, and a composite probe equipped with a MEMS microphone sensor is designed. The MEMS microphone sensor converts the sound pressure signal into a voltage signal, and then amplifies, converts with Sigma Delta, extracts and filters the collected signal. After the heart sound signal is uploaded to the PC, the Empirical Mode Decomposition (EMD) is carried out to reconstruct the signal, and then the Independent Component Analysis (ICA) method is used for blind source separation and finally the heart rate is calculated by autocorrelation analysis. At the end of the paper, a preliminary comparative analysis of the performance of the system was carried out, and the accuracy of the heart sound signal was verified.
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Received 2019-04-10;
Fund:

四川省科学技术厅项目(2019YFS0143)

Corresponding Authors: 杨波     Email: yb71728@cuit.edu.cn
About author: 丁大禹,E-mail:1206600150@qq.com
引用本文:   
丁大禹1, 2,李庆2,董亚朋1, 2,王王莹2,杨波1, 2.基于MEMS MIC的心音检测装置的设计和实现[J]  中国医疗器械杂志, 2019,V43(5): 337-340
DING Dayu1, 2, LI Qing2, DONG Yapeng1, 2, WANG WangYing2, YANG Bo1, 2.Design and Implementation of Heart Sound Detection Device Based on MEMS MIC[J]  Chinese Journal of Medical Instrumentation, 2019,V43(5): 337-340
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