Design and development of a heart rate measuring device using fingertip

Abstract

Abstract-In this paper, we presented the design and development of a new integrated device for measuring heart rate using fingertip to improve estimating the heart rate. As heart related diseases are increasing day by day, the need for an accurate and affordable heart rate measuring device or heart monitor is essential to ensure quality of health. However, most heart rate measuring tools and environments are expensive and do not follow ergonomics. Our proposed Heart Rate Measuring (HRM) device is economical and user friendly and uses optical technology to detect the flow of blood through index finger. Three phases are used to detect pulses on the fingertip that include pulse detection, signal extraction, and pulse amplification. Qualitative and quantitative performance evaluation of the device on real signals shows accuracy in heart rate estimation, even under intense of physical activity. We compared the performance of HRM device with Electrocardiogram reports and manual pulse measurement of heartbeat of 90 human subjects of different ages. The results showed that the error rate of the device is negligible.

Acquisition of Heart rate using NI-myRIO

“…Generally, the AC component is superimposed with the DC component. Thus, to obtain an AC waveform with high signal-to-noise ratio, it is very important to remove the DC component [2].  NI myRIO Fig.…”

Development of a Reflectance Photoplethysmogram Based Heart Rate Monitoring Device

“…The human heart pounds all the time to pump blood rich in oxygen to different parts of the body while also carrying waste products of the cells away from the tissues [1,2,3]. The heart beats continuously non-stop for every human alive whether one is awake or asleep.…”

“…The heart beats continuously non-stop for every human alive whether one is awake or asleep. Heart rate indicates the number of heartbeats per unit time, it is expressed as beats per minute (bpm) [3,4]. Heartbeat rate varies significantly between individuals.…”

“…Stethoscope is used by doctors to listen to patient's heartbeats, a process known as auscultation. It is an accurate method of measuring the heart rate [2,3,5]. Other methods of measuring heart rates are electrocardiogram (ECG) [9], Phonocardiogram (PCG), and blood pressure monitor but these methods are expensive and requires medical expertise [4,10].…”

“…There are basically two types, the transmittance and reflectance mode [2]. In the transmittance mode PPG, the transmitter and receiver are placed opposite each other [3,17] while in the reflectance mode PPG, the transmitter and receiver are place side by side [5,17]. Photoplethysmography is the process whereby the volumetric measurement of an organ is estimated optically [12].…”