一种基于能量谱非接触呼吸暂停检测技术的研究

Study on Technique for Non-contact Apnea Detection Based on Energy Spectrum

目的:研究一种适用于生物雷达非接触呼吸暂停检测和识别的新技术。方法:根据正常的呼吸信号与发生呼吸暂停时信号的强度特点,提出了一种基于时域的能量谱的方法。首先对构造的呼吸暂停信号进行处理并根据阈值进行判断,然后对雷达采集到的信号进行处理并判断是否发生了呼吸暂停。结果:采用该方法,在信噪比大于-8 dB的环境中能够很好地判断出是否发生了呼吸暂停。结论:该文提出的基于能量谱的方法能够较好地、实时地判断出人体是否发生了呼吸暂停。

Objective To study a new technique for non-contact detection of the occurrence of apnea from the respiratory signal monitored by the bio-radar, Methods According to the characteristics of strength from the normal respiratory signal and the apnea one, the energy spectrum based on time domain was proposed. Firstly, the apnea signal was constructed and processed to judge whether the apnea occurred based on the threshold. Then the respiratory signals collected by the bio-radar were processed according to the threshold to determine the occurrence of apnea, Results The method based on the energy spectrum could better determine the occurrence of apnea in the environment that the signal to noise ratio was greater than-8 dB. Conclusion The method proposed based on the energy spectrum can make reahime judgment of the occurrence of apnea from the respiratory signal detected by bio-radar.