March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the...
-
date post
20-Dec-2015 -
Category
Documents
-
view
216 -
download
1
Transcript of March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the...
![Page 1: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/1.jpg)
Team Pacemaker
Apparatus for the Analysis of Heart Sounds
Electronic Stethoscope / EKG Device
Luke Philips
Ryan Laterza
Min Dong Bian
Sarah Makhija
![Page 2: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/2.jpg)
Project Objectives
• Provide objective means of analyzing cardiac acoustics– Aid in diagnosis of heart murmurs
• Amplified signal from stethoscope, EKG– Synchronized signals
• Handheld device, portable memory, graphical display
![Page 3: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/3.jpg)
Design Summary
Medical Doctor
SoundStethoscope
Electrocardiogram Action Potential1
1
Reads
11 Amplfies1
1
Listens
11 Records 1* Conducts
11 Emit
Heart
Valve
Cardiac Muscle
4
1 Has
1
1 Has
11 Treats
Current Domain Model
![Page 4: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/4.jpg)
Design Summary (cont.)
Medical Doctor
Sound
Hardware Device
SD Card
Action Potential
11
Reads 1
1
Records
1
1
Writes
1
1
Records 1* Conducts
11 Emit
Heart
Valve
Cardiac Muscle
4
1 Has
1
1 Has
1
1 Treats
Software Utility
1
1
Generates
Three Dimensional Plot
1
1
Analyzes
Future Domain Model
![Page 6: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/6.jpg)
Preliminary Graphical Displays
•Dr. Weinberger’s data files•No accompanied EKG data
![Page 7: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/7.jpg)
EKG Triggering & Averaging
10 sec. FFT of Filtered Stethoscope
Data
![Page 9: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/9.jpg)
MSP430F1611 Features
• Program Memory Type Flash • Program Memory 48 kB• RAM 10 kB• I/O Pins 48 • ADC 12-bit SAR
– 8 Software Programmable Input Channels– 200 ksps Maximum Conversion Rate
• Integrated Peripherals DMA, 2 12-bit DAC• Interface 2 Hardware SPI or UART• Pin/Package 64LQFP
![Page 10: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/10.jpg)
Programming the Microcontroller
• MSPGCC – Free C Compiler TI MSP430 Family– Windows and Unix Compatible– Supports the MSP430F1611 MCU– Supports JTAG Interfacing
• Interface Used to Download Code from the PC to the MCU via a Serial/Parallel/USB Adapter
![Page 11: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/11.jpg)
Example C Code“Blinking Lights”
#include "hardware.h"
void delay(unsigned int d) {int i;for (i = 0; i<d; i++) {
nop();nop();}
}
int main(void) {int i;int o = 0;WDTCTL = WDTCTL_INIT; P1OUT = P1OUT_INIT; P2OUT = P2OUT_INIT; P1SEL = P1SEL_INIT;
P2SEL = P2SEL_INIT; P1DIR = P1DIR_INIT; P2DIR = P2DIR_INIT; P1IES = P1IES_INIT; P2IES = P2IES_INIT;P1IE = P1IE_INIT;P2IE = P2IE_INIT;while (1) { //main loop, never ends..
for (i=0; i<8; i++, o++) {P1OUT = (1<<i) | (0x80>>(o&7));delay(0x4fff);}
}}
![Page 13: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/13.jpg)
Amplifier Implementation
1. LF155/LF156…./LF356 JFET input Operational Amplifiers
Applications:•Precision High Speed Integrators
•Fast D/A & A/D Converters
•High Impedance Buffers
•Wideband, low noise, low drift amplifiers
![Page 15: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/15.jpg)
2. Single-Supply CMOS Operational Amplifiers
OR…
![Page 18: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/18.jpg)
Simple Circuit Testing for Optimal Design
OPA 335 LF356
3. Bypass Capacitors
0.1 nF & 4.7 nF
![Page 20: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/20.jpg)
EKG Schematic
Title
Size Document Number Rev
Date: Sheet of
<Doc> <RevCode>
EKG schematic
A
1 1Wednesday, March 01, 2006
Differential Amplifier INA321
Right Electrode
Left Electrode
DAC1
<Value>
3
1516
11
1
14
-
+
U2A
EL2360C-N
3
1312
11
5
14
-
+
U2BEL2360C-N
R1
100K
R2
100K
R3
RESISTOR
R4
RESISTOR
R5
1M
R6
1M
R7
10K
R81M
R9800
R10
RESISTOR
R11
RESISTOR
R122.2M
R132.2M
C1
01nF
C2
4.7nF
![Page 22: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/22.jpg)
Power• Power Supply
– “wall wart” interface• Supplies up to
9VDC/300mA
– Regulated 5V/3.3V– Stand alone Battery
Charger• AC12050615A-01
single cell charger
– Numerous Adjustable Voltage Regulators
![Page 23: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/23.jpg)
Power• Battery
– ED053455-2C• 860mAh Polymer
Lithium Ion Battery• High Energy Density• Low Cost• 3.7V Nominal Working
Voltage• Low Weight - 0.65oz
(18.5g)• Excellent Temperature
Performance• Self-Discharge: <8%
(per month)
![Page 24: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/24.jpg)
Power• Intelligence
– TI-TPS65011• Multi-Channel 1-cell
Li-Ion Power Mgmt IC
• 2DC/DC, 2 LDOs, I2C interface
TPS65011 Regulated Outputs(#) 4 Vin(Min/Max)(V) 2.5/6 Vout(Min/Max)(V) 2.5/3.3 Vout2 Adj(Min/Max)(V) 0.85/1.8 Iout3(A) 0.2 Iout4(A) 0.2 Vout3 Adj(Min/Max)(V) 0.9/6 Vout4 Adj(Min/Max)(V) 1.8/3
![Page 25: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/25.jpg)
UI
LCD, two stages:– Hantronix HDM08216L
• 8x2
– Seiko Backlight Graphic LCD
![Page 26: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/26.jpg)
UI
• Keypad • Low power Keypad Interface With the MSP430
• interrupt driven• Low power if all keys are
pressed and held simultaneously
• No crystal required• Minimal external
components• Suitable for MSP430
![Page 27: March 2, 2006CDR – Apparatus for the Analysis of Heart Sounds Team Pacemaker Apparatus for the Analysis of Heart Sounds Electronic Stethoscope / EKG Device.](https://reader036.fdocuments.net/reader036/viewer/2022062516/56649d4c5503460f94a2af3b/html5/thumbnails/27.jpg)
Updated Schedule & Division of Labor
Milestone 1 – Data sampling; Power device; EKG Circuit
Milestone 2 – UI / Software Integration
Expo – Device able to acquire and display data