可穿戴电容耦合式电极在载人航天心电检测中的应用

发布时间：2018-03-30 21:01

  本文选题：小尺寸　切入点：电容耦合式电极　出处：《航天医学与医学工程》2017年05期

【摘要】：目的研究可穿戴的小尺寸电容耦合式电极在载人航天中的应用问题。方法针对电极尺寸减小对信号幅值和噪声带来的影响,在系统设计中采用动态驱动屏蔽的电极结构、噪声性能优良的阻抗转换放大器等措施提高信噪比,并采用小波阈值滤波算法去噪。结果相比直径4 cm电极,直径2 cm电容耦合式电极采集的信号幅值减小,但心电信号P波、QRS波、T波均得到完整检测,并在降低界面噪声方面具有一定的优势。小波阈值滤波有效消除噪声。结论本文所设计的使用小尺寸电容耦合式电极的心电检测系统实现了隔着衣服对心电信号的非接触式检测,信号波形清晰完整,可以满足航天医学监护要求。
[Abstract]:Aim to study the application of wearable small size capacitive coupling electrode in manned spaceflight. Methods aiming at the effect of electrode size reduction on signal amplitude and noise, a dynamic drive shielding electrode structure is used in the system design. The signal to noise ratio (SNR) is improved by impedance conversion amplifier with good noise performance, and the wavelet threshold filtering algorithm is used to de-noise. The results show that compared with the 4 cm diameter electrode, the amplitude of the signal collected by the 2 cm capacitance coupling electrode is smaller than that of the 2 cm capacitance coupling electrode. But the P wave and QRS wave T wave of ECG were all detected completely. The wavelet threshold filter can effectively eliminate the noise. Conclusion the ECG detection system designed in this paper using the small-size capacitive coupling electrode realizes the ECG signal through clothes. Non-contact detection, The signal waveform is clear and complete, which can meet the requirements of aerospace medical monitoring.
【作者单位】： 中国科学院国家空间科学中心;中国航天员科研训练中心;中国科学院大学;
【基金】：国家自然科学基金(61401417) 中国航天员中心飞天基金(FTKY201304)
【分类号】：R85
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本文编号：1687611