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Introduction A tongue-operated assistive technology that enables individuals with severe physical impairments to control their environments. 1

Introduction

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Introduction. A tongue-operated assistive technology that enables individuals with severe physical impairments to control their environments. Tongue Drive System: Hardware. 3. 4. 1. 1. 2. Tongue Drive System: Commands. Right-Side Commands. Left-Side Commands. TDS Waveforms - PowerPoint PPT Presentation

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Page 1: Introduction

Introduction

A tongue-operated assistive technology that enables individuals with severe physical

impairments to control their environments. 1

Page 2: Introduction

Tongue Drive System: HardwareHeadset Components

1. Sensors:Four 3-axial magneto-resistive sensors (two on each pole)

3. Control Unit:MCU: TI CC25102.4 GHz RF Transceiver

2. Magnet:Disk-shaped [4.8mm 1.5mm]Embedded in a titanium tongue stud

4. Battery:130 mAh, 3.7 V, plus power management circuit

4

2

3

1 1

2

Page 3: Introduction

Tongue Drive System: Commands

TDS Discrete Commands Positions

TDS Waveforms Samples of each Command

3

Left-SideCommands

Right-SideCommands

Page 4: Introduction

Terminology

Classifier Combinations Stacking Majority Voting (Nine Classifiers)

Assessment Correctness Rejection Error? Misclassification Error

Five Bayesian: Linear Dia. Linear Quadratic Dia. Quad. MahalanobisFour KNNs: Euclidean City Block Cosine Correlation

4

Page 5: Introduction

Previous Work: mSSP Algorithm

RestingLeftUpLeft Click

RestingRightDownRight Click

5

Page 6: Introduction

Methodology Human Trials Dataset:

Able-bodied subjects from two Universities (4-NUB & 4-GTB)

8 participants x 5 sessions = 40 experiments

Calibration Training Testing 6

ITR

Page 7: Introduction

Results and Analysis:First Stage: Left-Side vs. Right-Side Classification

7

NUB = Northwestern UniversityGTB = Georgia Tech 20.1

%2.02%


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