1 Mid Presentation Optical Simulation System for Brain Waves Detection & Measurements Com puter תתתת תתתתתתת תתתתתתת תתתתתתh speed digital systems laboratory תתתת- תתתתתתת תתתתתתתת תתתתתת תתתתתתת תתתתתת תתתתechnion - Israel institute of technology epartment of Electrical Engineering Presenters: Tomer Zilbershtein 038308227 Shahar Porat 025137258 Supervised by: Yivgeny Rivkin Winter Semester 200
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1 Mid Presentation Optical Simulation System for Brain Waves Detection & Measurements המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory.
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Mid PresentationOptical Simulation System for Brain
Waves Detection & Measurements
Computer
High speed digital systems laboratoryהמעבדה למערכות ספרתיות מהירות
הטכניון - מכון טכנולוגי לישראלהפקולטה להנדסת חשמל
Technion - Israel institute of technologydepartment of Electrical Engineering
A program, which has a graphical user interface that, allows the user to change different pictures in different sizes and in different frequencies.While changing pictures, the system will generate a synchronized pulse signal to another device, which examines the brain signals.The system main purpose is to check eye vision.
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Block diagram
brain signalcollector Pulse
shaper
21 inch Screen
PC
Computer
step 1
pic 2
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Technical Specification •21 inch monitor
•Angle resolution of line: 5 minutes in distance of 2 meter.
•Synchronize resolution: at most 1mSec.
• The External Stimulator Coupler requires TTL level signal of at least 50 uS duration (>3.5V). The trigger signal must return to the low level before the end of a sweep (256 mS).
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Hardware Requirements • Power Supply: Vcc (5V)
• Connectors: RS232, BNC
• Data Rate: 20 bps
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Implementation • Graphical User Interface: using VB.
• Synchronize signal: through the serial port.
• Adjust the signal to TTL level (in Hardware).
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Serial port output signal
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Scheme
RS232
MAX12 -> TTL
Driver
Vccinput
IBM PS/2 IBM 3174PC
Brain SignalColector
RS232
BNC
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Alternative Implementation • Synchronize the output signal using information from the screen.
Picture A: Red line
Picture B: Blue line
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Video card signal
Measured with 1Mohm probe
Vsync Red line
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State Machine
Reset
A
B C
ED
Vsync
Vsync Vsync
Red Blue
Red Blue
Red/OutBlue/Out
Input:RedBlueVsyncReset(s.Port)
Output:Out
f = 3/10u = 300KHz
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Alternative Scheme
MAX12 -> TTL
Driver
Vccinput
IBM PS/2 IBM 3174PC
Brain SignalColector
Comparator
Logic/FPGA
CLK
BNC
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Program Flow Chose Program
Edit Steps Edit Program
Create Step
Execute Step
Finish
Run
NextPrevEnd
Stop
LoadExit
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Schedule• 16-22/12 Complete the design of the voltage converter.• 23-29/12 Testing the system in the Hospital.• 30/12-26/1 according to the results:
• Improve the system•Contrast, Brightness.•Work with two monitors.
• work on the alternative solution.• Hardware (two weeks).• Testing (two weeks).