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

Optical Stage Optical Stage RedesignRedesign

Team 4025Team 4025

Senior Design II – Spring 03-04

04025 – Optical Stage Redesign – Senior Design II

– Spring 03-04

Project Project PersonnelPersonnel

Customer : Dr. Risa RobinsonCustomer : Dr. Risa Robinson Team Mentor: Dr. Risa RobinsonTeam Mentor: Dr. Risa Robinson Project Coordinator : Dr. Alan NyeProject Coordinator : Dr. Alan Nye Team Members :Team Members :

Adam Pruyne : Team Manager MEAdam Pruyne : Team Manager ME Andrew Gallagher : EEAndrew Gallagher : EE Nate Smith : MENate Smith : ME


– Spring 03-04

Using a technique known as Particle Using a technique known as Particle Image Velocimetry (PIV), particle Image Velocimetry (PIV), particle dynamics in the human lung are dynamics in the human lung are being researchedbeing researched

Better understanding of particle Better understanding of particle dynamics in the human lung can dynamics in the human lung can lead to improved treatment of lead to improved treatment of pulmonary illnesses pulmonary illnesses

Project Project BackgroundBackground


– Spring 03-04

Design MethodologyDesign Methodology

Performed Needs AssessmentPerformed Needs Assessment Developed Multiple Concept DesignsDeveloped Multiple Concept Designs Performed Feasibility StudyPerformed Feasibility Study Synthesized the DesignSynthesized the Design Performed Prototype Development Performed Prototype Development Tested Design According To Tested Design According To

Performance Specifications Performance Specifications


– Spring 03-04

Needs AssessmentNeeds Assessment

The primary purpose of the needs The primary purpose of the needs assessment phase was to reach an assessment phase was to reach an agreement between the customer agreement between the customer and the team, on what the apparatus and the team, on what the apparatus should accomplish.should accomplish.

These assessed needs formed the These assessed needs formed the parameters for the evolution of the parameters for the evolution of the design concepts.design concepts.


– Spring 03-04

Concept DevelopmentConcept Development Several concepts of various Several concepts of various

complexities were developed.complexities were developed.


– Spring 03-04

Analysis and SynthesisAnalysis and Synthesis

Through an in-depth study of the Through an in-depth study of the claw, the following design issues claw, the following design issues were identified were identified Motor Control System for Camera Motor Control System for Camera

FocusFocus Torque due to the claw mechanismTorque due to the claw mechanism Locking mechanism for claw spindleLocking mechanism for claw spindle System deflectionSystem deflection


– Spring 03-04

Analysis and SynthesisAnalysis and Synthesis For remote focusing of the camera, a For remote focusing of the camera, a

Motorola-type stepper motor and driver Motorola-type stepper motor and driver circuit were utilized.circuit were utilized.

The clock circuit was fabricated using a The clock circuit was fabricated using a National Semiconductor timer chip.National Semiconductor timer chip.

Power was supplied by a 12 VDC bench-top Power was supplied by a 12 VDC bench-top power supply, already in inventory. power supply, already in inventory.


– Spring 03-04

Analysis and SynthesisAnalysis and Synthesis Mathematical and Mathematical and

Finite Element Analyses Finite Element Analyses were performed to were performed to verify the Arm Assembly verify the Arm Assembly torque, the minimum torque, the minimum anti-rotational clamping anti-rotational clamping force and system force and system deflection.deflection.


– Spring 03-04

Prototype Prototype DevelopmentDevelopment

Minor performance enhancing features Minor performance enhancing features were added as a result of development:were added as a result of development: Clamping block thickness was reduced, reducing Clamping block thickness was reduced, reducing

the clamping force needed to prevent the clamping force needed to prevent undesirable Arm Assembly rotation.undesirable Arm Assembly rotation.

Keyway feature was added to the interface Keyway feature was added to the interface between the pivot shaft and Arm Assembly between the pivot shaft and Arm Assembly elbow bracket to further prevent undesirable elbow bracket to further prevent undesirable Arm Assembly rotation.Arm Assembly rotation.

Model support positively holds and supplies flow Model support positively holds and supplies flow to the lung model with “teeth” and a hollow to the lung model with “teeth” and a hollow support bolt and provides adjustability to support bolt and provides adjustability to accommodate different models.accommodate different models.


– Spring 03-04

Prototype DevelopmentPrototype 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)


– Spring 03-04

TestingTesting

An Acceptance Test An Acceptance Test Procedure (ATP) was Procedure (ATP) was developed from the developed from the customer’s customer’s performance performance objectives.objectives.

The apparatus was The apparatus was subjected to the subjected to the requirements of the requirements of the ATP.ATP.

Testing proved Testing proved successful.successful.


– Spring 03-04

BudgetBudget

$2000 was $2000 was allotted to allotted to this project.this project.

Only $1207 Only $1207 was needed.was needed.

Bottom Line: Bottom Line: The project The project was under was under budget by budget by nearly $800.nearly $800.

Item QTY Level Part Number Nomenclature

1 1 1 OSR OPTICAL STAGE REDESIGN

2 1 2 OSR-5-EAA ELECTRICAL ASSEMBLY

3 1 2 OSR-6-MSA MODEL SUPPORT ASSEMBLY

4 1 2 OSR-7-CAA CLAW ARM ASSEMBLY

5 1 2 OSR-8-PBA PILLOW BLOCK ASSEMBLY

6 1 2 OSR-9-SA SLIDE ASSEMBLY

7 2 2 25X075ALLEN SCREW, MODEL SUPPORT TO TABLE

8 4 2 N010X100 SCREW, PILLOW BLOCK MTG.

9 4 2 N03X25 SCREW, MOTOR MOUNT

ELECTRICAL ASSEMBLY $122.96

MODEL SUPPORT ASSEMBLY $41.02

CLAW ARM ASSEMBLY $57.85

PILLOW BLOCK ASSEMBLY $82.91

SLIDE ASSEMBLY $900.81

MISC. MTG. HARDWARE $2.00

GRAND TOTAL: $1,207.55


– Spring 03-04

Future ConsiderationsFuture Considerations

A worm gear drive should replace A worm gear drive should replace the clamping block mechanism.the clamping block mechanism.

A modular model support would A modular model support would provide repeatability to provide repeatability to experimentation.experimentation.

Graduated positioning slides would Graduated positioning slides would also increase repeatability.also increase repeatability.


– Spring 03-04

ConclusionsConclusions

Claw Concept was Claw Concept was chosen for its chosen for its technical and technical and financial merit.financial merit.

The Claw Concept The Claw Concept satisfactorily met all satisfactorily met all of the customer’s of the customer’s performance performance objectives.objectives.

Final cost is $800 Final cost is $800 under budget.under budget.

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

Documents

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