摘要
光电容积脉搏波传感器可用于测量人体心率、血氧饱和度、呼吸率等生理参数。由于测试部位的局限性和对运动干扰的敏感性,使其主要应用于临床,而非日常便携式监护类设备中。鉴于此,重新设计传感器探头LED与PD结构,提高信号强度,进行对比实验选取耳部测试点,并利用三轴向加速度传感器,综合3通道信号,获取噪声源构建自适应滤波器,削减行走与跑步状态下的运动干扰,计算心率。经过一系列人体运动实验,以心电设备做参照验证了本设备心率计算准确率。
Photoplethysmography sensor can be used to measure heart rate, oxygen saturation, respiration rate, and so on. Because of the limitation of the detecting location and the sensibility to the movement interference, it is developed for clinical application as usual, but not as home-appliance medical device. Thus, the sensor structure including LED and PD is redesigned to enhance the signal intensity, the detecting location on ear is selected by the comparison experiment, and also the 3-axis acceleration sensor is implemented to acquire the noise source for the adaptive filter which can weaken the movement interference in wallking and running state, and the heart rate can be calculated. After a sequence of activities experiment on human body, using ECG device as reference, the accuracy rate of the heart rate calculation is verified.
出处
《传感器与微系统》
CSCD
北大核心
2012年第8期119-122,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(J20100974)
