摘要
可穿戴医疗设备的舒适性、耐用性越来越受到人们的重视。本文采用了导电织物作为心电监护终端的心电电极,并根据织物电极的特点设计了可穿戴心电采集系统。系统主要包含两个部分:心电采集模拟前端和单片机系统。心电采集模拟前端主要将织物式心电电极采集到的微弱心电信号进行进一步的放大和滤波,以得到病人高信噪比的稳定心电波形。单片机系统中采用TI公司的MSP430F149型号芯片作为微处理器。由微处理器控制将心电模拟信号转化为数字信号,并写入Flash内。最后可以和电脑串口进行通信,上传Flash内部的心电数据。Flash芯片采用华邦W25Q256芯片,内存为256 Mbits,以150 Hz采样频率可以连续存储病人24 h的心电信号。
With advantages of comfort and durability, wearable medical devices have received people＇s more and more attention. This paper chooses the conductive fabric as the ECG electrodes of ECG monitor, and designs the wearable ECG acquisition system according to the characteristics of the fabricbased active electrodes. The system mainly consists of two parts： ECG acquisition analog front-end part and MCU system. ECG acquisition analog front-end amplifies weak ECG signals collected from fabric-based active electrodes and filtered them to get high SNR and stable ECG waveform of the patient. MCU system model uses MSP430F149 chip from TI Company as the microprocessor, which converts ECG analog signal into digital signals, then the signals were written to Flash. The ECG data is sent to the computer through serial interface for further analysis. Winbond＇s W25Q256 Flash chip is adopted as the storage medium with memory 256 Mbits. It can continuously store a patient＇s ECG data for 24 h at 150 Hz sampling frequency.
出处
《中国医疗设备》
2015年第1期6-9,共4页
China Medical Devices
