Universal design of a microcontroller and IoT system to detect the heart rate

[摘要] Heart rate analysis provides vital information of the present condition of the human body. It helps medical professionals in diagnosis of various malfunctions of the body. The limitation of vision impaired and blind people to access medical devices cause a considerable loss of life. In this paper, we intended to develop a heart rate detection system that is usable for people with normal and abnormal vision. The system is based on a non-invasive method of measuring the variation of the tissue blood flow rate by means of a photo transmitter and detector through fingertip known as photoplethysmography (PPG). The signal detected is firstly passed through active low pass filter and then amplified by a two stages high gain amplifier. The amplified signal is feed into the microcontroller to calculate the heart rate and displays the heart beat via sound systems and Liquid Crystal Display (LCD). To distinguish arrhythmia, normal heart rate and abnormal working conditions of the system, recognition is provided in different sounds, LCD readings and Light Emitting Diodes (LED).

[发布机构] School of Electronics Engineering, VIT University, Vellore, Tamil Nadu; 632014, India^1

[效力级别] 工业技术

[关键词] Active low-pass filters;Heart rate analysis;Heart-rate detection;High gain amplifier;Liquid crystal display(LCD);Medical professionals;Noninvasive methods;Photoplethysmography (PPG)