基于STM32和FMCW雷达的非接触式心率监测系统

摘要

针对传统接触式心率监测设备佩戴繁琐、舒适性差，不适用于长时间无感监测的问题，设计一套基于STM32单片机与FMCW雷达的非接触式心率监测系统。系统以STM32F103C8T6作为主控单元，利用R60ABD1毫米波雷达采集人体胸腔微动回波信号，经过信号解析处理后得到心率数据，通过OLED屏幕完成本地数据显示；同时借助ESP8266‑Wi‑Fi模块实现数据无线传输，当心率超出正常阈值时触发报警模块提示异常。测试结果表明，该系统可以实现非接触条件下的心率采集、本地显示、无线上传与超限报警，结构简单、成本低，在静坐状态下心率测量平均误差小于5次/min，适用于居家日常简易生命体征监测场景。

Abstract

Aiming at the problems of traditional contact‑type heart‑rate monitoring devices, such as cumbersome wearing procedures, poor comfort and inapplicability to long‑term non‑perceptual monitoring, a non‑contact heart‑rate monitoring system based on STM32 microcontroller and FMCW radar is designed. The system adopts STM32F103C8T6 as the main‑control unit, uses the R60ABD1 millimeter‑wave radar to collect echo signals of tiny human chest‑wall vibrations, obtains heart‑rate data after signal analysis and processing, and realizes local data display via an OLED screen. Meanwhile, wireless data transmission is achieved with the ESP8266‑Wi‑Fi module, and the alarm module is triggered to warn of abnormalities when the heart rate exceeds the normal threshold. Test results show that the system can complete non‑contact heart‑rate acquisition, local display, wireless upload and over‑limit alarm. Featuring simple structure and low cost, it achieves an average heart‑rate measurement error of less than 5 beats/min in the sitting‑still state, and is suitable for simple daily vital‑sign monitoring at home.

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