前言：

         电路城在之前有网友分享过一个老外的设计，即基于AD8232心电心率图监测测量（链接：https://www.cirmall.com/circuit/2037），该设计主要阐述的是基于AD8232芯片对ECG及其他生物电测量应用的集成信号调理模块。然后在具有运动或远程电极放置产生的噪声的情况下提取、放大及过滤微弱的生物电信号。 本设计介绍的是心率监测器转接板模块，能够智能化的将ECG信号模拟信号转换成心率数据。

心率监测器转接板概述：

         The Heart Rate Monitor Interface (HRMI) is an intelligent peripheral device that converts the ECG signal from Polar Electro Heart Rate Monitor (HRM) transmitters into easy-to-use heart rate data. It implements a sophisticated algorithm for computing an average heart rate even with noisy or intermittent data from the transmitter. The HRMI also provides analog inputs and a digital input/output utility port to ease integration into custom applications.

Features

• Multiple interfaces: USB, Logic-level serial and I2CTM

• Dual heart rate processing algorithms: averaged and raw

• Uses the RMCM01 Polar OEM receiver

• Compatible with coded and non-coded Polar transmitters including T31, T31C, T61C and Wearlink®

• 32-entry heart rate data history buffer

• Four 8-bit ADC inputs

• Up to a 5 channel digital input/output utility port

• Simple command/response interface

• Programmable power-on default operation

Applications

• Custom exercise equipment

• Portable heart rate monitoring devices

• Bio-feedback devices

• Heart beat aware body-worn electronics

硬件连接示意图：

附件内容截图：

源文出处：https://danjuliodesigns.com/sparkfun/sparkfun.html