ECONOMICAL HEART RATE MEASUREMENT DEVICE WITH REMOTE MONITORING USING FINGERTIP

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Pierce Stephens
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1 ECONOMICAL HEART RATE MEASUREMENT DEVICE WITH REMOTE MONITORING USING FINGERTIP PROJECT REFERENCE NO. : 37S1390 COLLEGE : SRI SIDDHARTHA INSTITUTE OF TECHNOLOGY, TUMKUR. BRANCH : TELECOMMUNICATION ENGINEERING GUIDE : KESHAVA MURTHY T.G STUDENTS : ANOOP M.P K RENUKA CHARAN HAREESH H.M KRISHNAMURTHY K.R Keywords: Heart beat sensors, Microcontrollers(16F628A,16F877A),GSM, Zigbee (CC2500). Introduction: In the case of emergency for old people who are suffering with heart diseases continuous monitoring of the patient is required which is sometimes not possible in the hospital, or the patient location is far away from the hospital. In such a case prototype circuit is useful to measure the heart rate. The functioning of existing HRM device is based on the truth that the blood circulates for every one heart beat which can be sensed by using a circuit formed by the combination of an LED and Photo sensor. Depending upon the rate of circulation of blood per second the heart beat rate per minute is calculated. Some of the existing HRM devices are expensive and some of them are not ergonomic. Later optical technology based HRM devices came to existence which are economic, user friendly and they sensed the heart beat through the fingertip Objectives: There is a significant increase in heart related diseases and any abnormalities in health of heart are directly related to changes in heart rate. Hence there is need of accurate and 1

2 affordable heart rate measuring (HRM) devices. In proposed project it has been enhanced the use of existing HRM devices by incorporating the wireless technology between the pulse counting unit and the output unit which consists of LCD display, GSM and buzzer, and by enabling the remote communication with help of GSM modem. This project deals about the implementation of GSM technology in Medical applications. Proposed project aim is to send alert messages in emergency times, i.e. when a person is alone in home or travelling if he got heart attack then alerting messages will be send to the mobile phone, the message consist of location of that person also. Here we get the alerting message from the GSM modem (SMS Message). Methodology: Fig 1: Sequence diagram The sequence diagram shown in the figure 1 illustrates the working principle of our HRM device. The sensor unit consists of an infrared light-emitting-diode (IR LED) and a pin photo diode, placed side by side, and the fingertip is placed over the sensor assembly, as shown below. The IR LED transmits an infrared light into the fingertip, a part of which is reflected back 2

from the blood inside the finger arteries. The photo diode senses the portion of the light that is reflected back. The intensity of reflected light depends upon the blood volume inside the fingertip.

3 from the blood inside the finger arteries. The photo diode senses the portion of the light that is reflected back. The intensity of reflected light depends upon the blood volume inside the fingertip. So, every time the heart beats the amount of reflected infrared light changes, which can be detected by the photo diode. With a high gain amplifier, this little alteration in the amplitude of the reflected light can be converted into a pulse. Forthe amplification purpose MCP602 op amp with resistor capacitor circuit is used. The microcontroller(pic16f628a) counts the number of pulses over a fixed time interval and thus obtains the heart rate of the subject. The pulse count from the microcontroller is given to the zigbee transmitter module(cc2500rf). This module transmits the pulse count to the receiver part.the transmitted pulse count is received by another zigbee module (CC2500RF). This received signal is given to the microcontroller PIC16F877A. The microcontroller builds a message from the received pulse count and that message is sent to the remote location with the help of a GSM module.at the same time the received pulse count that is heart rate in bpm (beats per minute) is displayed on the LCD display by the PIC16F877A and a buzzer indication is given. Fig 3: Block diagram of Receiver 3

4 RESULT: Heart rate in bpm Sl.No Persons Relaxed state Stressed state 1. Person Person Person Person Person Conclusion: The device is designed to provide a continuous access to the patients heart rate through wireless communication. The functioning of this device is based on the truth that the blood circulates for every one heart beat which can be sensed by using a circuit formed by the combination of a photodiode and IR LED. Depending upon the rate of circulation of blood per second the heart beat rate per minute is calculated. This device consists of two microcontrollers one of which takes the input from the heart beat sensor and calculates the heart rate of the patient and sends this information to another microcontroller that takes the responsibility to send message through GSM modem and displays the result on LCD display. Future scope: A graphical LCD can be used to display a graph of the change of heart rate over time. Serial output can be attached to the device so that the heart rates can be sent to a PC for further online or offline analysis. The whole health monitoring system, which we have proposed can be integrated into a small compact unit as small as a cell phone or a wrist watch. 4

5 The project can be implemented as complete patient health monitoring system by measuring B.P, Temperature etc., which can be done by connecting corresponding sensors to the MCU. An alphanumeric keypad can be included in order to store the phone number, name etc. instantaneously. GPS can be included in order to know the location of the user. References: [1] M.M.A. Hashem, Rushdi Shams, Md. Abdul Kader, and Md. Abu Sayed Design and Development of a Heart Rate Measuring Device using Fingertip, Department of Computer Science and Engineering Khulna University of Engineering & Technology (KUET) Khulna 9203, Bangladesh. [2] Subhani Sk. M., Sateesh G.N.V, Chaitanya Ch. and PrakashBabu G Implementation of GSM Based Heart Rate and Temperature Monitoring System, Research Journal of Engineering Sciences, ISSN Vol. 2(4), 43-45, April (2013) Res. J. Engineering Sci. 5

HUMAN BODY MONITORING SYSTEM USING WSN WITH GSM AND GPS

HUMAN BODY MONITORING SYSTEM USING WSN WITH GSM AND GPS Mr. Sunil L. Rahane Department of E & TC Amrutvahini College of Engineering Sangmaner, India Prof. Ramesh S. Pawase Department of E & TC Amrutvahini