1 Final Design Review Stephanie Moran, Ryan Rosario, Zachary Stauber, Bethany Tomerlin, Juan Carlos Ybarra

2 Outline of Presentation I. Overview of Problem A. Objectives B. Using priorities to compare solutions II. Solutions Considered A. Optical – materials, benefits, drawbacks B. Capacitance – materials, benefits, drawbacks C. Polymer – materials, benefits, drawbacks III. Project Outline A. Future work with polymer design B. GANTT - timeline

3 Main Objectives By Priority 1.Mountability 2.High Elongation (>10%) 3.Fast Response Time 4.Precision

4 dfd Comparison of Three Possible Routes PrioritiesOpticsCapacitorPolymer Resistance Mountability (Glove)_ ++ Mountability (Parachute) _ 00 High Elongation0_ ++ Fast Response (Glove)+00 Fast Response (Parachute) ++_ Precision_ +0

5 dfd Comparison of Three Possible Routes PrioritiesOpticsCapacitorPolymer Resistance Mountability (Glove)_ ++ Mountability (Parachute) _ 00 High Elongation0_ ++ Fast Response (Glove)+00 Fast Response (Parachute) ++_ Precision_ +0

6 Pros and Cons of Fiber Optic Sensing Pros High precision Well Studied Response Cons Unreliable above 6% strain.

7 Capacitive Sensing as a Solution Pros: Fast response Precision Cons: Unreliable readings Inconsistent manufacturing Mounting problems due to size Elongation limits

8 Capacitive Sensing: Parallel Plates Kapton/Rubber with Parallel Plates Ferrous Chloride Etchant Used for pressure sensors Restricted strain due to electrode attachment

9 Capacitive Sensing: Longitudinal Interdigital Capacitors Water-Jet with SolidWorks file Testing Capacitance with lathe for micron resolution nF nF nF Calculated capacitance of 2.8 nF with 0mm separation Separation (mm)Measured Capacitance (nF)

10 Polyurethane Mixed with Carbon Black Pros and Cons High Elongation Easily Mountable Easily Fabricated Measurable Resistance Change Inconsistent Values Imprecise Porous Large Error ProsCons

11 Hand Stretched Measurements Elongated In Instron Resistance Recorded with Corresponding Extension Research Conducted and Experimental Setup

12 Polymer Elongation Results Possible Sources of Error Compression due to Clips Metal Clamps on Instron Internal Resistance not accounted for

13 The Next Steps: Process Engineering to Create Reproducible Resistance Values

Fraction Carbon Black Polymer Choice Shore Hardness Viscosity Pot Life 14 The Next Steps: To test various compositions to optimize key parameters

Gantt Chart 15

Motion Capture Technology Film Animation Video Game Production Very Expensive Equipment Interactive Video Games Sense-On is very inexpensive Market Applications for Sense-On

17 Polymers mixed with carbon black is best for target applications

18 Questions?

19 Full Gantt

20 Resistivity in rubber/CB composites is fit with an empirical scaling law