8/4/2019 rocky 16-08-2011-ECG

1/32

ADVANCED ECGMONITORING

SYSTEM

Submitted by,ROCKEY SUSEELANM.Tech, E.S (2 nd SEM)

8/4/2019 rocky 16-08-2011-ECG

2/32

CONTENTS

IntroductionBlock diagram of ECG monitoring systemHardware FunctionalityCircuit diagramsS ystem developing tools

esultsConclusion

eferences

8/4/2019 rocky 16-08-2011-ECG

3/32

INTRODUCT ION

Th e medical monitoring system w h ich are

composed of two parts, w h ich are monitoring

unit and a monitoring center.Here t h e user can carry t h e mobile monitoring

unit and it can monitor t h e p h ysiological real

time data from t h e user wit h sensors.

Th e intelligent control system automatically

connect to t h e monitoring system.

8/4/2019 rocky 16-08-2011-ECG

4/32

Block diagram of ECG monitoringsystem

8/4/2019 rocky 16-08-2011-ECG

5/32

HARDWAREFUNCT IONAL ITY

ARM7TDMI

ECG MODULE

GPRS MODULE

LCD DISPLAY

MAX232-MAX2323 IC

8/4/2019 rocky 16-08-2011-ECG

6/32

ARM7TDM I

ARM stands for advanced RISC mac h ines

In t h is project using P h ilips LPC 2138microcontroller wit h an ARM7TDM I processorcore.

ARM7TDM I- S processor, running at up to 72 M Hz.

ARM7TDM I is a 32 bit processor

Up to 64 kB of SRAM on t h e ARM local bus forh ig h performance CPU access.

8/4/2019 rocky 16-08-2011-ECG

7/32

ARM7TDM I

10 bit A/D converter wit h input multiplexing among 8pins and 10 bit D/A converter.General purpose timers.

PW M/T imer block wit h support for t h ree-p h ase motorcontrol.External count inputs.Real- Time Clock ( RTC) wit h separate power pin2 kB S tatic RAM powered from t h e RTC power pin,allowing data to be stored w h en t h e rest of t h e c h ip ispowered off.Watc h dog Timer.

8/4/2019 rocky 16-08-2011-ECG

8/32

ARM7TDM I

In t h is project t h e main modules of ARM7TDM I t h atare going to use are

UART

ADCGPI O

UART stands for universal async h ronous receivertransmission. It is used for transmission and

reception of data.ADC stands for analog to digital conversion. We h ave10 bit 8 ch annel ADC .

8/4/2019 rocky 16-08-2011-ECG

9/32

GPI O PI N & REG ISTER

PINSEL0 Register0 R/W P.0-P.15

PI NSEL1 R egister 1 R/ W P. 1 6-P. 31

PI NSEL2 R egister 2 R/ W P. 1 6-P. 31

IO0DIR Direction of each pin (0-input 1- output)

IO0SET 1 -Port set; 0 - not affect

IO0CLR 1 -Portclear; 0 - not affect

IO0 PI N Pin status

8/4/2019 rocky 16-08-2011-ECG

10/32

UART

In ARM7TDM I , UART is used for transmission andreception of data. At a time 1 byte of data isreceived or transmitted.

1 6 byte Receive and Transmit FIF Os.

UART1 wit h th e addition of a modem interface.

UART3 includes an Ir DA mode to support infraredcommunication.

8/4/2019 rocky 16-08-2011-ECG

11/32

UART REG ISTER

RXD0 InputTXD0 Output

7 6 5 4 3 2 1 0

U0R BR ReceiverBuffer

D D D D D D D D

U0T HR TransmitHoldingRegister

D D D D D D D D

U0DLL D ivisorlatc h LSB

D D D D D D D D

U0DLM D ivisorlatc h MSB

D D D D D D D D

U0LCR L ine controlRegister

DLAB S etBreak

S tickparity

Evenparity

Number of stopbit

Wordlengt h

Wordlengt h

Wordlengt h

8/4/2019 rocky 16-08-2011-ECG

12/32

ADC

We h ave 1 ADC ch annels in ARM7TDM I

It is a 10 -bit 8 ch annel ADC

It takes 2 .44 s for conversion of ANALOG values to DIGITAL value.

Measurement range 0 to 3 .

ADC h as a power down mode i.e. even w h ent h e processor goes to sleep mode A/D conversion will still continue

8/4/2019 rocky 16-08-2011-ECG

13/32

ADC REG ISTER

A DCR Control Register

ADDR D ata Register

31-28 27 26-24 23-22 21 20 19-17 16 15-8 7-0

- EDGE START - P DN - CLKS BURST CLKD I SEL

31 30 29-27 26-24 23-16 15-6 5-0

DONE OVERUN - CHN - V/V ref -

ADCR

ADDR

8/4/2019 rocky 16-08-2011-ECG

14/32

ECG sensor module

Electro cardio gram module, h ere it includesth ree leads system. One lead, ground connectedto rig h t leg, t h e ot h er two at left arm and rig h tarm or left arm or left leg or rig h t arm and leftleg.

Th e output signal from t h e sensor s h ouldprocessed before connected to processor.

8/4/2019 rocky 16-08-2011-ECG

15/32

LCD DIS PLAY

A 4 bit LCD display used in t h is project.

Th e LCD h as a 1 6X 2 display.

It consists of 1 6 pins in w h ich 4 pins are used fordata / command

3 control pinsRegister selectRead / WriteEnable /D isable

8/4/2019 rocky 16-08-2011-ECG

16/32

LCD PIN structure

VEE : contrast.RS :0 command

1 data.

R/W : 0 write1- readAddress: 0x80 onwards

8/4/2019 rocky 16-08-2011-ECG

17/32

GPRS MODULE

GPRS module is used for sending t h e ECG signalvalue to t h e control station.

At first we pass AT in order to initialize GPRS along wit h enter key

We h ave a set of instructions known as t h e AT command set in order to initialize t h e GPRS module.

We t h en get an OK from t h e GPRS module

8/4/2019 rocky 16-08-2011-ECG

18/32

MAX232 - MAX2323 IC

Th is is an RS - 232C standard I C wh ich is used forserial communication.

It is used for interfacing t h e microcontroller wit h GPRS module.

Th is I C is used in applications w h ere 12 v is not

available.

8/4/2019 rocky 16-08-2011-ECG

19/32

Circuit diagram - lpc 2138 module

8/4/2019 rocky 16-08-2011-ECG

20/32

Max 2323

8/4/2019 rocky 16-08-2011-ECG

21/32

LCD

8/4/2019 rocky 16-08-2011-ECG

22/32

Voltage Regulator

8/4/2019 rocky 16-08-2011-ECG

23/32

Developing tools

S oftware sideKeil 4uvLPC 23 xx Flas h utility

Hardware sideExpress P CB

PC sideVisual Basic

8/4/2019 rocky 16-08-2011-ECG

24/32

ADC module simulation result

8/4/2019 rocky 16-08-2011-ECG

25/32

LCD output

8/4/2019 rocky 16-08-2011-ECG

26/32

H / W Module

8/4/2019 rocky 16-08-2011-ECG

27/32

Reception at PC side

8/4/2019 rocky 16-08-2011-ECG

28/32

ECG output

8/4/2019 rocky 16-08-2011-ECG

29/32

Conclusion

Introduces t h e design of a very efficient low-cost

ECG monitoring system interface to a GPRS

module.h ig h ly flexible and user-specific.

8/4/2019 rocky 16-08-2011-ECG

30/32

References

[ 1] Wang Xiao h ong Liu Li Inf. & Eng. Dept., Sh andong Jiaotong Univ., Jinan,

Ch ina; Th e design of Remote medical monitoring system based sensors

and GPRS Information tec h nology and application, 2009 . IFF TA09

international forum. Volume: 3 . Issue Date: 15 - 17 M ay 2009 O n page(s ) :

51 6 - 519

[ 2] D e Capua . C.Meduri Dayu. A,Morello R: Wang, Kaiping Yu, Hong Guo;

Instrumentation and measurement ,I EEE transaction on Volume : 59

,Issue 10 , publication year 2010 .

[ 3]M . Malik and A.J Camm., Heart Rate Variability ., Futura Publis h ing Co.

Inc., S ept. 1995

8/4/2019 rocky 16-08-2011-ECG

31/32

[4 ] Bai V.T.; Real time portable telemedicine system for cardiac patient.,Biomedical information Engineering, 2009 .,International conference on Future.Publication Year: 2009 , Page(s ) : 57 - 6 0

[ 5] Boskovic, A.; Despotovic, M; An Efficient Approac h to ECG S ignal

Transmission via GPRS . Th e international conference on Computer as a Tool,EUROCON 2005 . Volume: 1 . Publication Year: 2005 , Page(s ) : 7 6 - 79 .

[6 ] C ai Ken; Liang Xiaoying; Development of remote monitoring cardiac patientsystem based on GPRS . 2010 International Conference on BiomedicalEngineering and computer science. : Publication Year: 2010 , Page(s ) : 1 - 4

[ 7] Xin Ge; Dakun Lai; Zuxiang Fang; A Real time continous ECG Transmitttingmetod t h roug h G PRS wit h low power consumption,, Th e 2 nd InternationalConference on. Bioinformatics and Biomedical Engineering 2008 ICBBE2008Publication Year: 2008 , Page(s ) : 55 6 559 .

References

8/4/2019 rocky 16-08-2011-ECG

32/32

References

[ 8] Jianwei Dong; Sh i Zh ang; Xiaonan Jia; A Portable Intelligent ECG monitor

based on Wireless internet and Embedded system Tec h nology., Biomedical

Engineering and informatics, 2008 .,International conference. Volume: 2

Publication Year: 2008 , Page(s ) : 553 - 55 6

[ 9] A ndrew N. S loss, Dominic S ymes, Ch ris Wrig h t ARM System

Developer s Guide Designing and Optimizing S ystem S oftware, 3 rd

edition, 2005

[ 10] S teve Furber. ARM System-on- Ch ip Arc h itecture. Addison-Wesley, 2 nd

edition, 2000 .[ 11] D avid S eal , Addison-Wesley ARM Arc h itecture Reference Manual 2 nd

edition.

References