1. Optical Stage Redesign
Team 4025

2. Project Personnel Customer : Dr. Risa Robinson
Team Mentor: Dr. Risa Robinson
Project Coordinator : Dr. Alan Nye
Team Members :
Adam Pruyne : Team Manager ME
Andrew Gallagher : EE
Nate Smith : ME

3. Project History
Using a technique known as Particle Image Velocimetry (PIV), particle dynamics in the human lung are being researched
Better understanding of particle dynamics in the human lung can lead to improved treatment of pulmonary illnesses

4. Needs Assessment Limited to a two dimensional analysis
Cumbersome positioning system
Manual camera focus
Difficult to maintain perpendicularity between camera and Light sheet generator

5. Concept Development The Globe
The light sheet generator is kept stable and the model is positioned as needed
Model support rotates on a hemispherical optical stage

6. Concept Development The Gyro
Similar to the Globe concept, the light sheet generator is kept stable and the model is positioned as needed
A U-shaped bracket provides one of the rotational degrees of freedom

7. Concept Development The Ring The camera and LSG move in unison
around the stationary model
The ring is supported by a roller assembly

8. Concept Development The Claw
The camera and LSG move in unison around the quasi-stationary model
Camera and LSG are mounted on robot-like arms

9. Feasibility
Various feasibility methods were applied to our concepts and the Claw deemed the most feasible
More technically feasible because
Most positional freedom of all the concepts
Much more mechanically stable
Posed less design concerns
More Financially feasible because
Falls within the $2000 budget

10. Summary of Major Design Objectives and Performance Specifications
All flow passageways must be accessible to the PIV imagery equipment
Does the apparatus provide the necessary degrees of freedom of motion to allow all the passageways to be analyzed?
The light sheet generator and the camera are to be located perpendicular to each other in a single two-dimensional plane
Do the light sheet generator and the camera exhibit 90 +/- 2 degrees of perpendicularity when an object of similar tolerance is placed between them?
The camera focus will be adjustable by the operator at the PC workstation
Is the camera focus adjustable while seated at the PC workstation?

11. Analysis and Synthesis
Through in-depth study of the claw, the following design issues have been identified
Motor Control System for Camera Focus
Torque due to the claw mechanism
Locking mechanism for claw spindle
System deflection

12. Analysis and Synthesis
Motor Control System
Superior Electric Stepper Motor
Drive control
Motorola MC3479 stepper driver used with an LTC timer (clock circuit) to make the control system
User control box will allow control of the motor speed and direction

13. Analysis and Synthesis
Torque due to claw mechanism
Moment about x axis and weight determines the size of slides needed
Moment about the y axis determines the rotational locking force of the claw arm assembly Z Y X

14. Analysis and Synthesis
Locking mechanism for claw spindle interface
Frictional brake was chosen because of its simplicity

15. Analysis and Synthesis
System deflection
Pin
Half inch diameter pin used to keep the deflection down
Shaft material was chosen for maximum strength

16. Analysis and Synthesis
System deflection
Extension Arm
SMI Inc. part number extm45-45 aluminum extruded x channel was used for rigidity
Strengthening gussets are used at the extension arm joints

17. Future Considerations
Budget Plan
Work breakdown structure
Schedule

18. Schedule