坐垫式多生理参数检测系统的开发与研究

Development of System of Measuring Multiple Physiological Parameters by Special Cushion

为了能够在日常无拘束状态下实时监测人体的生理状况,该文设计了一种"坐垫式"生理参数检测系统,测量人体坐立状态下的心率和呼吸率。该系统采用无电极、低负荷的方式连续从坐垫上采集人体的生理信号。硬件部分主要包括传感器信号采集电路,单片机控制模块和蓝牙无线传输模块;同时针对两种生理信号噪声干扰大、频率低的特点,采用巴特沃什低通滤波器对信号进行滤波,通过优化后的Matlab算法进行了实现。结果表明,该系统可以准确地测量受测者坐立时的心率、呼吸率,从而实现了人体身体状况信息的实时监测。

In order to monitor the physiological condition of the human body in daily life, this study has designed a system of measuring physiological parameters based on cushion, which could detect heart rate and respiration rate when people are sitting. The system can continuously colect signal from cushion with a state of low pressure and without sticking any electrode on people’s bodies. The hardware part mainly includes the signal acquisition circuit of the sensor, microcomputer control module and Bluetooth wireless transmission module. For the two physiological signals have the characteristic of the large noise and low-frequency, we use the Butterworth low-pass filter to process the signal according to an optimized Matlab algorithm. The results show that this system can measure heart rate and respiration rate accurately. Thus, the real-time monitoring on body’s information can be implemented.