MAHARAJA INSTITUTE OF TECHNOLOGY

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING

WIRELESS ECG TRANSMISSION USING ZIGBEE AND MICROCONTROLLER

GROUP NUMBER : 11

GUIDE NAME : Asst. Prof - Harish kumar K.P

TEAM MEMBERS :Apoorva shree M.S [4MH12EC404]Manjesh K [4MH12EC415]Namratha gowda M.P [4MH12EC419]Pallavi G.R [4MH12EC421]

CONTENTS

INTRODUCTION BLOCK DIAGRAM HARDWARE COMPONENTS SOFTWARE REQUIREMENTS FLOWCHART WORK PROGRESS

INTRODUCTION

o Wireless monitoring devices can make the biomedical system more convenient.

o Wireless technology can be implemented inside biomedical areas where there are several electrical devices that are connected through long cables.

o So this project is an implementation of Electrocardiograph (ECG)

data acquisition and plotting wirelessly manner

BLOCK DIAGRAM

HARDWARE COMPONENTS

ELECTRODES INSTRUMENTATION AMPLIFIER FILTERS MICROCONTROLLER ZIGBEE

ELECTRODES

• The ECG is converted into electrical voltage by electrodes.• The disposable electrodes are attached to the patients skin and can be

easily removed.

INSTRUMENTATION AMPLIFIER The AD620 is a low cost, high accuracy instrumentation amplifier

that requires only one external resistor to set gain (Rg).The AD620’s low power, low supply voltage instrumentation

amplifier. It is available as 8-lead mini-DIP and SOIC package.

FEATURES

Gain : 10Power supply : +/- 2.3V to +/- 18VCurrent : 1.3mACMRR : 93dB – 110dBBandwidth : 1.2 kHz

FILTERS

The circuit consist of following filters

1.Band pass filter: It is the combination of HPF and LPF.

It is designed to allow the frequency from 0.5Hz to 102Hz.

2.Notch filter: It is used to eliminate the power line interference which occurs at 50Hz.

BAND PASS FILTER: It allows the frequency from 0.5hz to 102hz.

NOTCH FILTER Used to eliminate power line interference which occurs at 50hz. This filter rejects one particular frequency while passing all other

frequencies.

MICROCONTROLLER

Features: Supply voltage : 2.7 to 3.6v Flash memory : 8KB RAM : 768bytes Timers : 4 (16bits) I/0 Ports : 2 (8bits)

ZIGBEE

Zigbee specification which suits for high level communication protocol used to create personal area network.

Zigbee is based on IEEE 802.15.4 standard. Zigbee devices can transmit the data over longer distances by

passing the data through a mesh network. XBEE - PRO ZB embedded RF modules provides cost effective

wireless connectivity to the devices in zigbee mesh network.

SPECIFICATIONS Data rate : 250Kbps Serial data rate : 1200bps – 1Mbps Frequency band : 2.4GHz Supply voltage : 2.7 – 3.6VDC Range : 100m

ECG:

1.The ECG signal represents the electrical activity of the heart.

2.The impulses are originated at SINO ATRIAL NODE that is passed on tothe ATRIO VENTRICULAR NODE.

PROGRAMMING LANGUAGE

Embedded C

SIMULATION SOFTWARE

Proteus

INSTALLED AT THE REMOTE NODE

1.XCTU software

2.Oscilloscope GUI

3.Eltima software

SOFTWARE

Flow chartstart

ec

sss

Acquiring ECG signals using electrodes

Amplification and filtering

Ecg signals are transmitted through the zigbee wirelessly

zigbee rx get data?

Displaying the waveform on PC

stop

YesNo

WORK PROGRESS

WORK COMPLETED: 1. ECG acquisition is done and it is displayed on CRO. 2. Testing of ZIGBEE is done. 3. The hardware portion is completed.

WORK TO BE DONE:

1. coding of the ZIGBEE is to be done. 2. ECG signal has to be transmitted wirelessly. 3. Extraction of BP from ECG is to be done.

Thank you