Wang Jing, Li Changzhi
Annu Int Conf IEEE Eng Med Biol Soc. 2018 Jul;2018:4432-4435. doi: 10.1109/EMBC.2018.8513392.
Respiration monitoring for apnea diagnosis and movement tracking for physical activity analysis are essential and valuable indicators of underlying medical conditions in senior health care. Compared with other health sensing technologies, radar has shown its advantages in terms of non-contact implementation, immunity to ambient light and temperature changes, hardware simplicity, and long range coverage. Among various radar types, frequency-shift keying (FSK) radar inherits the ability to measure respiration from Doppler radar, while also having the ability to track the absolute range of a moving target with much less bandwidth requirement than frequency modulated continuous wave (FMCW) radar and ultra-wideband (UWB) radar. Therefore, in this paper, an FSK radar system is employed for both remote respiration monitoring and absolute range tracking. Fundamental theory and operating principle of FSK system are detailed. Respiration monitoring and range tracking experiments of a human subject were performed in an indoor environment. Results are presented to demonstrate the practical feasibility of the FSK sensing technology being applied to single senior home care applications.
呼吸监测用于呼吸暂停诊断，运动跟踪用于身体活动分析，是老年保健中潜在医疗状况的重要且有价值的指标。与其他健康传感技术相比，雷达在非接触式实现、对环境光和温度变化的免疫性、硬件简单性以及长距离覆盖方面显示出其优势。在各种雷达类型中，频移键控（FSK）雷达继承了多普勒雷达测量呼吸的能力，同时还具有跟踪移动目标绝对距离的能力，其带宽要求比调频连续波（FMCW）雷达和超宽带（UWB）雷达少得多。因此，在本文中，一个FSK雷达系统被用于远程呼吸监测和绝对距离跟踪。详细阐述了FSK系统的基本理论和工作原理。在室内环境中对一名人体受试者进行了呼吸监测和距离跟踪实验。展示的结果证明了FSK传感技术应用于单一老年家庭护理应用的实际可行性。
