Non-invasive heart rate measurement on wrist using IR LED with IoT sync to web server

Abstract

This work focuses on monitoring the heart rate of a person in a non-invasive manner from the user’s wrist. The principle concept used here is Photoplethysmography (PPG) which detects the change in blood volume as the heart pulsates. This setup includes an Infrared (IR)—detector pair that senses the pulses and a self-designed circuit that processes the collected signal. This data is understood by graphical visualizations on MATLAB and an intelligent algorithm is devised to estimate the dynamic heart rate of a person. For the simplicity of user interface, the calculated data is displayed on the TFT LCD screen and also recorded in the SD card. This recorded data is synchronized to the cloud (web server) via a Wi-Fi module. A front end, easy to understand graph is displayed for the user in the web to analyze the behavior of his/her heart, upon which medical remedies can be advised.