Athlete Blood Sampling
Athlete Blood Sampling
senior capstone
V1 Prototype - Nitinol Release Subsystem
V2 Prototype - Pull-Pin Release Subsystem
V3 Prototype - Nichrome Release Subsystem
V1 Prototype
Used a leaf spring catch that held it from rotating, and was pulled by Nitinol wire in order to actuate it. Limited by power requirements.
V2 Prototype
Focused on the blade mechanism and thus used a simple and manual pull-pin mechanism. A pin was inserted to stop it from rotating and it was manually pulled to actuate it.
V3 Prototype
The final prototype used Dyneema string to stop it from rotating. The Dyneema string was in contact with a Nichrome wire, which was energized until it cut the Dyneema string.
User testing of Final Prototype - V3
Catch & Release Mechanism in Final Prototype - V3
Objective: Develop a reliable catch and release mechanism to rotate a shaft.
Skills Used:
Designing for micro scale (device was 4.8 cm x 2.9 cm x 1.1 cm)
Rapid prototyping
Building Excel calculators for force/sizing analysis
Design Constraints:
Device remains under 1.5 cm in height
Self contained (no outside power source required)
Remain on body for 48+ hr
Take two or more samples at distinct times
Design Process:
Thorough research and ideation on possible solutions.
Designed in Solidworks based on force and sizing calculations.
Testing and iteration through various prototypes.
Final Solution: Final prototype is functional and reliable.
