1Prototype Presentation

Stephanie Moran, Ryan Rosario, Zachary Stauber, Bethany Tomerlin, Juan Carlos Ybarra

2We modified our goals to more suitably match our application

1. Inexpensive

2. High Elongation (>10%)

3. Fast Response Time

4. Precision

• We need:• Movement through Space• Rotation • Real Time Feedback

Can act as a supplement• Reduce Errors

4

Improvements to be Made to Our System in Order to compete with existing Motion Capture Technologies

5Our Product Could Be Used to Monitor and Provide Feedback for Joint Extension

• Inexpensive

• Output of strain

• Track degenerative diseases

• Posture Feed Back Loops

• Need to reduce distractibility

6Current Processing Technique

7Current Processing Technique

8Current Processing Technique

9Current Processing Technique

Calender

10Bubbles Create Stress Concentrators In Rubber

Ippolito, M. Physical Review, 75, 224110 (2007).

11Bubble Removal with Vacuum

Before Vacuuming

12Bubble Removal with Vacuum

Before Vacuuming During Vacuuming

13Bubble Removal with Vacuum

Before Vacuuming During Vacuuming After Vacuuming

14Improvements in Processing to Help Consistency

Weighing Carbon Black Alternating Mixing Time

Optimized Measurement Set-Up

Characterized Samples, Normalized and Real Data

0 0.2 0.4 0.6 0.8 1 1.20

50

100

150

200

250

300

350

Resistance vs Extension

sample 1sample 2sample 3

Extension (in./in.)M

- Ohm

0 0.2 0.4 0.6 0.8 1 1.20

2

4

6

8

10

12

Resistivity vs. Extension

sample 1sample 2sample 3

Extension

M-O

hm-in

.

Hysteresis of Samples

0 0.2 0.4 0.6 0.8 1 1.20

2

4

6

8

10

12

14

16

18

Hysteresis

cycle 1 upcycle 1 downcycle 2 upcycle 2 downcycle 3 upcycle 3 down

Extension (in.)

M-O

hm

0 0.2 0.4 0.6 0.8 1 1.2 1.40

50

100

150

200

250

300

Hysteresis

cycle 1 upcycle 1 downcycle 2 upcycle 2 downcycle 3 upcycle 3 down

Extension (in.)

M-O

hm

Sample used in Prototype

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10

50

100

150

200

250

300

f(x) = 453.915509134616 x³ − 198.775426573427 x² + 95.2364976689977 x + 5.59790209790215R² = 0.998050312909082

Resistance vs Extension

sample 2Polynomial (sample 2)

Extension (in./in.)

M- O

hm

19Minimum Goals for Strain Sensor Prototype

Minimum Requirements:MC

Text Output: Strain vs. Resistance

Sensor

R = 453.9 ε 3 - 198.7 ε 2 + 95.23 ε + 5.597

20Glove for Final Design

Final Design:

MC

Arduino

Output:•Resistance vs. Strain•Position of sensor

Multiplexer Amp

Bread Board

21We plan on altering our current process to yield more reproducible samples

1. Better dispersed phase

2. Optimize void removal

Gantt Chart 22

23Conduction in the composite cannot be explained by tunneling, but can be modeled by Mean Field Theory.

e-e-

30nm

24Complete Circuit Design

MC

Normalization of Data

26Comparisons of Processing Techniques

27Comparisons of Processing Techniques

28Failure vs. Hole Radius Size