presented by: charbel a. habib harpreet kaur jassal hassan a.m. muhsen

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Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

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Page 1: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Presented By:Charbel A. Habib

Harpreet Kaur JassalHassan A.M. Muhsen

Page 2: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

OutlineThe Project

Input unit Processing unitControl UnitOutput unit

Future WorkConclusion

Page 3: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

The ProjectSystem Architecture

System Architecture

Input Unit

Main Unit(Microcontroller/PC)

Robot (Output Unit)

EOG Sensors(Electrodes)

Amplifier

Process Unit

Control Unit

Filtering

Segmentation

Translation

Comunicator

Page 4: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

EOGEOG Signal

EOG: Electrooculogram the recording of the changes in voltage that occur

with the eye position.

o Electro: electricalo Oculo: eyeo Gram: recording

Page 5: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

EOGEOG Signal

EOG: Electrooculogram spherical battery

positive terminal: the cornea negative terminal: the retina.

0.4 and 1 mV

Page 6: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

EOGEOG Signal

Page 7: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

EOGEOG Signal

The signals are measured using EEG disposable electrodes

Page 8: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Input UnitSensors

Amplifier

Page 9: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

EOGElectrode signal:

0.4 and 1 mV

This low voltage is not strong neither usable

SOLUTION: ???

Page 10: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

EOGAmplifier

Designing an amplifier Requirements:

Total gain of 5000 Cutoff frequency of 25Hz LPF Offset compensation

Page 11: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Amplifier Design

Page 12: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Buffer Amplifier

U1A

LM747AH

4

3

5

2

1

R1

3.3k

R23.3k

1

VCC

12V

nVCC

-12V

VCC

nVCC

V1500mV

0

3

U2A

LM747AH

4

3

5

2

1

R3

3.3k

VCC

12V

VCC

-12V

V2200mV

6

0

VCC

VCC

4

XMM1

2

5

Page 13: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Difference Amplifier

Amplifier Gain = -R2/R1

U3A

LM747AH4

3

5

2

1

VCC

12V

nVCC

-12V

VCC

R4

3.3k

R5

3.3kR83.3k

10

0

R6

33k

R7

33k7

nVCC8

XFG2

XSC3

A B

G

T

XSC1

A B

G

T

0

9

12

11

Page 14: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

High Frequency Filter

4th order Butterworth FilterCut off Frequency of Filter

(f0)= 1/(2π*R*C)

R1

10k

R2

10k

R3

10kU3A

LM747AH

4

3

5

2

1

VCC

12V

nVCC

-12V

VCC

nVCC

R4

5.6k

1

R5

10k

R6

10k

R7

10kU1A

LM747AH

4

3

5

2

1

VCC

12V

VCC

-12V R8

5.6k

7VCC

VCC

XFG1

0

XSC1

A B

G

T

0

XSC2

A B

G

T

9

0

C50.47uF-POL

3

4

C10.47uF-POL

2

0

C20.47uF-POL

6

8

C30.47uF-POL

5

0

Page 15: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Low Pass Filter

Page 16: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Summer Amplifier

U1A

LM747AH4

3

5

2

1

VCC

12V

nVCC

-12V

R1

10k

R2

10k

R3

10k

R410k

R5

20K_LINKey = A

50%1

0 2

4

XFG1

XSC1

A B

G

T

5

XSC2

A B

G

T

3

0

VCC

12V

VCC

VCC

12V

VCC

0

Page 17: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Inverting and Non inverting Amplifier + Rectifier

Inverting Amplifier = -R2/R1 & Non Inverting Amplifier = 1+ R2/R1

XFG1

XSC1

A B

G

T

U1A

LM747AH4

3

5

2

1

VCC

12V

nVCC

-12V

R1

3.3k

R2

33k

2

0

XSC2

A B

G

T

R3

10k

0

D2

1N4001GP

6 4

U2A

LM747AH4

3

5

2

1

VCC

12V

nVCC

-12VR4

3.3k

R5

33k

0 3

D1

1N4001GP

5

0

1

XSC3

A B

G

T

R6

10k

7

0

Page 18: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Half Wave Rectifier

Page 19: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Amplifier Implementation

Page 20: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Amplifier Gain

Page 21: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Problems Unavailability of small power supply

Electrodes

Amplifier Vcc supplier

Page 22: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Main UnitProcess Unit

Control Unit

Page 23: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Processing UnitRight side movement of eyes

Left side movement of eyes

Movement of eyes during reading

Upside movement of eyes

Downward movement of eyes

Blinking movement of eyes

Page 24: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Signal ProcessingFiltering (Median Filter)Segmentation (Clustering)

Page 25: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Original Data

Page 26: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Filtered Data

Page 27: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Segmented Data

Page 28: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

ProblemsMicrocontroller Delay

Median Filter Window Size

Page 29: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Control Unit

Control Unit

Translation

Comunicator

Page 30: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Control UnitTranslation (PWM)

Center = 128Right & Up = 185Left & Down = 70

CommunicationDirect from Microcontroller

Page 31: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Main Unit

Overall PictureStart

Running Mode

Read Input

Yes

Process input

Send Output

Calibrate

No(Learning Mode)

End

Page 32: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

ProblemsCalibration

ADC Delay

Page 33: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Output Unit

Page 34: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Demo

Page 35: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Future WorkOn/Off Mechanism

Real Neck Implementation

Applying to Aesop3000

Page 36: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

Conclusion

Page 37: Presented By: Charbel A. Habib Harpreet Kaur Jassal Hassan A.M. Muhsen

THANKSAny Questions???