摘要
以心音信号与微机电系统(micro-electro-mechanical system,MEMS)电子听诊器声传感器为基础,对该传感器的信号调理与信号采集传输系统进行了设计。系统以现场可编程门阵列(field-programmable gate array,FPGA)为核心控制信号的采集,HC-05蓝牙模块作为信号传输模块,探测频率为20 Hz~1 kHz,在115200的波特率下通过蓝牙进行波形到上位机的传输。系统测试过程中,心音信号被声音传感器采集然后通过该系统进行处理发送,并在上位机上显示实时信号,测试结果表明:该系统工作稳定,可有效,准确地获得信噪比为37.7 dB的处于20~600 Hz的心音信号。
Based on the acoustic sensor of heart sound signal and MEMS electronic stethoscope,the signal conditioning and signal acquisition and transmission system of the sensor are designed.This system takes FPGA as the core control signal acquisition,hC-05 Bluetooth module as the signal transmission module,the detection frequency is 20 Hz~1 kHz,and the waveform is transmitted to the upper computer through Bluetooth at 115200 baud rate.During the system test,the heart sound signal is collected by the sound sensor and then processed and sent through the system,and the real-time signal is displayed on the upper computer.The test results show that the system works stably,can be effective,and accurately obtain the 20~600 Hz heart sound signal with signal-to-noise ratio of 37.7 dB.
作者
李晨歌
张国军
段思存
程丽霞
纪松祥
Li Chen′ge;Zhang Guojun;Duan Sicun;Cheng Lixia(Ji Songxiang,State Key Laboratory of Dynamic Testing Technology,North University of China,Taiyuan 030051,China)
出处
《国外电子测量技术》
北大核心
2021年第4期135-138,共4页
Foreign Electronic Measurement Technology
基金
国家重点研发计划(61927807)
山西省“1331工程”点学科建设计划项目资助。
