Optical Stage Redesign Team 4025 Senior Design II – Spring 03-04

04025 – Optical Stage Redesign – Senior Design II – Spring Project Personnel Customer : Dr. Risa Robinson Customer : Dr. Risa Robinson Team Mentor: Dr. Risa Robinson Team Mentor: Dr. Risa Robinson Project Coordinator : Dr. Alan Nye Project Coordinator : Dr. Alan Nye Team Members : Team Members : Adam Pruyne : Team Manager ME Adam Pruyne : Team Manager ME Andrew Gallagher : EE Andrew Gallagher : EE Nate Smith : ME Nate Smith : ME

04025 – Optical Stage Redesign – Senior Design II – Spring Using a technique known as Particle Image Velocimetry (PIV), particle dynamics in the human lung are being researched 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 Better understanding of particle dynamics in the human lung can lead to improved treatment of pulmonary illnesses Project Background

04025 – Optical Stage Redesign – Senior Design II – Spring Design Methodology Performed Needs Assessment Performed Needs Assessment Developed Multiple Concept Designs Developed Multiple Concept Designs Performed Feasibility Study Performed Feasibility Study Synthesized the Design Synthesized the Design Performed Prototype Development Performed Prototype Development Tested Design According To Performance Specifications Tested Design According To Performance Specifications

04025 – Optical Stage Redesign – Senior Design II – Spring Needs Assessment The primary purpose of the needs assessment phase was to reach an agreement between the customer and the team, on what the apparatus should accomplish. The primary purpose of the needs assessment phase was to reach an agreement between the customer and the team, on what the apparatus should accomplish. These assessed needs formed the parameters for the evolution of the design concepts. These assessed needs formed the parameters for the evolution of the design concepts.

04025 – Optical Stage Redesign – Senior Design II – Spring Concept Development Several concepts of various complexities were developed. Several concepts of various complexities were developed.

04025 – Optical Stage Redesign – Senior Design II – Spring Analysis and Synthesis Through an in-depth study of the claw, the following design issues were identified Through an in-depth study of the claw, the following design issues were identified Motor Control System for Camera Focus Motor Control System for Camera Focus Torque due to the claw mechanism Torque due to the claw mechanism Locking mechanism for claw spindle Locking mechanism for claw spindle System deflection System deflection

04025 – Optical Stage Redesign – Senior Design II – Spring Analysis and Synthesis For remote focusing of the camera, a Motorola- type stepper motor and driver circuit were utilized. For remote focusing of the camera, a Motorola- type stepper motor and driver circuit were utilized. The clock circuit was fabricated using a National Semiconductor timer chip. The clock circuit was fabricated using a National Semiconductor timer chip. Power was supplied by a 12 VDC bench-top power supply, already in inventory. Power was supplied by a 12 VDC bench-top power supply, already in inventory.

04025 – Optical Stage Redesign – Senior Design II – Spring Analysis and Synthesis Mathematical and Finite Element Analyses were performed to verify the Arm Assembly torque, the minimum anti-rotational clamping force and system deflection. Mathematical and Finite Element Analyses were performed to verify the Arm Assembly torque, the minimum anti-rotational clamping force and system deflection.

04025 – Optical Stage Redesign – Senior Design II – Spring Prototype Development Minor performance enhancing features were added as a result of development: Minor performance enhancing features were added as a result of development: Clamping block thickness was reduced, reducing the clamping force needed to prevent undesirable Arm Assembly rotation. Clamping block thickness was reduced, reducing the clamping force needed to prevent undesirable Arm Assembly rotation. Keyway feature was added to the interface between the pivot shaft and Arm Assembly elbow bracket to further prevent undesirable Arm Assembly rotation. Keyway feature was added to the interface between the pivot shaft and Arm Assembly elbow bracket to further prevent undesirable Arm Assembly rotation. Model support positively holds and supplies flow to the lung model with “teeth” and a hollow support bolt and provides adjustability to accommodate different models. Model support positively holds and supplies flow to the lung model with “teeth” and a hollow support bolt and provides adjustability to accommodate different models.

04025 – Optical Stage Redesign – Senior Design II – Spring Prototype Development Clamping Block Modification (thinned block and increased through slot length) Keyway Modification (no prior keyway) Model Support Modification (added gripper teeth with flow pass though and screw adjust)

04025 – Optical Stage Redesign – Senior Design II – Spring Testing An Acceptance Test Procedure (ATP) was developed from the customer’s performance objectives. An Acceptance Test Procedure (ATP) was developed from the customer’s performance objectives. The apparatus was subjected to the requirements of the ATP. The apparatus was subjected to the requirements of the ATP. Testing proved successful. Testing proved successful.

04025 – Optical Stage Redesign – Senior Design II – Spring Budget $2000 was allotted to this project. $2000 was allotted to this project. Only $1207 was needed. Only $1207 was needed. Bottom Line: The project was under budget by nearly $800. Bottom Line: The project was under budget by nearly $800.

04025 – Optical Stage Redesign – Senior Design II – Spring Future Considerations A worm gear drive should replace the clamping block mechanism. A worm gear drive should replace the clamping block mechanism. A modular model support would provide repeatability to experimentation. A modular model support would provide repeatability to experimentation. Graduated positioning slides would also increase repeatability. Graduated positioning slides would also increase repeatability.

04025 – Optical Stage Redesign – Senior Design II – Spring Conclusions Claw Concept was chosen for its technical and financial merit. Claw Concept was chosen for its technical and financial merit. The Claw Concept satisfactorily met all of the customer’s performance objectives. The Claw Concept satisfactorily met all of the customer’s performance objectives. Final cost is $800 under budget. Final cost is $800 under budget.