一种基于STM32和PPG技术的腕戴式心率计设计  

Design of a wrist-worn heart rate meter based on STM32 and PPG technology

作　　者：刘劲松[1] 朱纯午 杨莉[1] 

机构地区：[1]武汉理工大学自动化学院,湖北武汉430070

出　　处：《电子技术应用》2016年第10期62-64,68,共4页Application of Electronic Technique

摘　　要：基于STM32和反射式光电容积脉搏波(PPG)技术设计了一种具有抗运动干扰特性的腕戴式心率计。由STM32产生的PWM波控制红外光源的开通或关闭。光电传感器采集到光强信号转换为电信号后经过I/V转换和信号放大及滤波电路,送入STM32作进一步处理,通过蓝牙4.0可以方便地将测得的心率参数发送到液晶屏上显示。采用LMS自适应滤波算法滤除PPG信号中运动干扰噪声。实验表明,该心率计在人体处于不同运动状态(静止、行走及跑步)下都有很高的测量准确率。A kind of anti- noise and wrist- worn wearable cardio tachometer is designed based on STM32 and reflection- type photo-plethysmography( PPG) technology. The open up and turn off of the infrared light source are controlled by PWM wave generated by STM32. The light intensity signals acquired by the photoelectric sensor are transformed into electrical signals. After being processed for the circuit of I / V transformation and signal amplifying and filtering, the PPG signals are transmitted to STM32 for further pro-cessing. After which the measured heart rate parameter is sent to the LCD via Bluetooth 4. 0. In addition, a LMS adaptive filtering algorithm is proposed to filter out the interference noise in PPG signals. Finally, a series of experiments show that the heart rate meter has high measurement accuracy during three kinds of common physical activities( standing, walking and running).

关 键 词：STM32 光电容积脉搏波 腕戴式 LMS自适应滤波算法 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]