摘要
设计了一种运用光电容脉搏波描记法(PPG)采集脉搏波信号的装置,完成了脉搏波信号采集、处理。以双光源二极管作为传感采集端,光频转换器作为光源接收数据端,采集脉搏波信号;单片机STM32L151CBT6完成对双光源二极管闪烁频率的控制以及采集到的原始信号的去噪算法实现;提出了使用形态学滤波器结合RC数字滤波器的方法来去除信号中的基线噪声。经验证,能够得到较好的特征波,提高了信噪比,装置数据可通过蓝牙模组传输到终端显示。
A signal acquisition device is designed to achieve acquisition,processing of pulse wave signal by photoplethysmography(PPG).The dual light source diode is used as the sensing and acquisition terminal,and the optical frequency converter is used as the data receiving terminal to acquire the pulse wave signal.MCU STM32L151CBT6 completes the control of double light source diode flicker frequency and the realization of the denoising algorithm of the collected original signal.A morphological filter combined with RC digital filter is proposed to remove baseline noise.It is proved that it can get better characteristic wave and improve the signal-to-noise ratio.The data can be transmitted to the terminal display via the Bluetooth module in this device.
作者
庞宇
蒋伟
张博臻
PANG Yu;JIANG Wei;ZHANG Bozhen(College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《传感器与微系统》
CSCD
2020年第12期112-114,118,共4页
Transducer and Microsystem Technologies
