P13675Bike Helmet Mirror System

Rob Fish (Industrial Designer) Zachary Kirsch (Mechanical Engineer, PM) Martin Savage (Mechanical Engineer) Olivia Scheibel (Mechanical Engineer) Henry Woltag (Industrial and Systems Engineer)

Team

Guide◦ Mr. Rick Lux

Customer◦ Dr. B. Brooks

Faculty Support◦ Dr. M. Gomes◦ Dr. M. Lam

Sponsor◦ RIT MSD Project Office

Guides, Advisor, Sponsor

Introduction and Project History Customer Needs Concept Selection Risk Assessment

Outline

Current rear view mirrors systems for bicycles are clumsy, unattractive, poor quality, too expensive, or have a small viewing range.

Our solution is to create a low cost alternative that requires no power to operate,

and attaches to anyhelmet.

Mission Statement

Background

Background

AdjustableOver-head system

Green ProcessDesign For Disassembly

RecyclabilityNo Power Input

Env. Friendly Materials

Environmental Considerations

Fog / Rain Resistant

Withstand Elements

Ability to block out Sun

Doesn't Increase Wind Resistance

MarketabilityInexpensive

Easy to Store

Aesthetically PleasingColors

Shape

Customizable

Ergonomics

Comfortable

Light Weight

Safe to Ware

Functionality

Doesn’t Compromise Helmet Integrity

Adjustable w/o ToolsHolds Mirror Orientation

Adjustable w/o Tools

Provides Wide Viewing Angle

Detaches from HelmetAdjustable Mirrors

Adjustable MirrorsClear, Correctly Oriented Image

Attaches to Multiple Types of Helmets

DurableMinimizes Obstruction

to Forward view

Affinity Diagram

Customer NeedsCustomer Needs Team’s

Evaluation1. Safe to wear 92. Provides a wide angle view behind the cyclist 93. Holds mirror orientation as set by user 94. Minimizes obstruction to the cyclist’s forward field of vision 95. Attaches to a typical helmet without compromising the helmet’s integrity 96. Is lightweight and comfortable to wear 97. Is durable 98. Provides a clear, correctly oriented image 99. Is adjustable to provide optimal view for the rider 910. Is inexpensive ($10-20) for the consumer 311. Detaches from the helmet 312. Can be adjusted without the use of tools 313. Requires no power input 314. Is aesthetically pleasing 315. Refrains from significantly increasing wind resistance 116. Is fabricated in an environmentally friendly way 1

Engineering SpecificationsSource Specification (Metric) Unit of

MeasureMarginal

ValueIdeal Value

Comments/Status

S1 CN 13 Power required for operation Watts - 0 No power input

S2 CN 12 Number of tools required for adjustment Quantity 1 0

S3 CN 10 Materials cost Dollars 30 20Market value projection, no

restriction on prototype beyond budget

S4 CN 2,5,11 Number of helmet styles system can attach to Quantity - 3 Minimum value

S5 CN 1,5,7 Durability - survive drop from height ft - 6 Dropped with mirror system attached to helmet

S6 CN 1,6 Weight lbs 0.775 0.175

S7 CN 1,3,7,15 Survive wind speeds mph 45 60Mirrors maintain desired

position and orientation up to these speeds.

S8 CN 1,5,11 Breakaway force (if snagged on object) lbs - 45 Based on NHTSA neck injury

criteriaS9 CN 2,3 Rear image angle degrees 90 110 Based on benchmarking

S10 CN 1,4,15 Projected area of main mirror in direction of motion in2 18 8

S11 CN 16 Recyclability of materials used % - 100 Exceptions: mirrors, adhesives

S12 CN 1,5,7,11,12 Mirrors and supports removable from helmet Yes/No - Yes

Interface between helmet and supports need not be

removableS13 CN 1,4 Lateral forward viewing angle degrees - 180 Does not block lateral vision

when looking straight aheadS14 CN 2,3,8,9 Distance behind at which vehicles are

visable ft 100 200 Based on hand calculations

S15 CN 1,3,8 Image oriented properly Yes/No - Yes

Functional Decomposition

Morphological Chart

Concept Selection

Risk AssessmentID Risk Item Effect Cause

Likelihood

Severity

Importance Action to Minimize Risk Owner

1

Improper mirror orientations and alignment.

Image may be inverted, out of focus, or the projected image may not line up with target.

 Lack of optics experience within the team

3 3 9Research optics, determine faculty and other experts who can assist with optical design.

Martin Savage

2Improper structural design.

 System may not be structurally sound, natural frequency may pose stability issues.

Lack of vibration experience within the team

3 3 9Research vibrations, determine faculty and other experts who can assist with structural design.

Olivia Scheibel

3

Exceeding the desired manufacturing cost.

 System will be unable to be manufactured within desired price range.

Cost of materials to build system 

3  2 6 Research lower cost alternatives for system components.

 Zachary Kirsch

4Unable to adhere to NHTSA standards

Prototype unable to be manufactured for retail

 Strict standards conflicting with stability needs

2  3  6   Be knowledgeable of applicable standards.

Henry Woltag

Risk Assessment

ID Risk Item Effect Cause

Likelihood

Severity

Importance Action to Minimize Risk Owner

5 Parts are ordered too late

Prototype cannot be completed in time

Item lead times not taken into consideration

2 2 4No procrastination. Parts needed identified as early as possible. Order well in advance.

Henry Woltag

6 Do not meet Customer needs

Dissatisfied customer.

Poor needs identification/ inability to achieve needs in time

2 2 4Be sure to properly and realistically identify customer needs, not just ideal needs.

Zachary Kirsch

7 Poor documentation

Disorganization, future project improvement difficult

Consistent lack of documentation updating

2 1 2Documentation will be kept consistent through weekly checks of notes/files/ previous notes.

Henry Woltag

8 Group DysfunctionProject does not get completed to required specifications.

Lack of Communication. Poor Compromising.

1 1 1

Consistent communication and project duty management. Expected to complete individual responsibilities.

Zachary Kirsch

Pareto Risk Analysis

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Risk Rating Cumulative Percent

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ScheduleSu M T W R F S Su M T W R F S Su M T W R F S Su M T W R F S

Meet Group and GuideIdentify Team LeaderBecomer Familiar with EDGEPrepare Code of EthicsIdentify CustomerIdentify Customer NeedsIdentify Engineering SpecificationsPrepare Function DecompositionPrepare Affi nity DiagramPrepare Morphological and Pough ChartsConcept SelectionAsses Risks and MitigationSystems Design ReviewReevaluate System DesignSelect Optical SystemSelect Frame SystemPerform optical analysisPerform structural analysisPerform CFD analysisPrepare Bill of Materials Create CAD modelsDetailed Design ReviewReevaluate Detailed DesignOrder Materials

MSD-P13675: Bike Helmet Mirror System Week 1 Week 2 Week 3 Week 4

ScheduleSu M T W R F S Su M T W R F S Su M T W R F S Su M T W R F S Su M T W R F S Su M T W R F S Su M T W R F S

Meet Group and GuideIdentify Team LeaderBecomer Familiar with EDGEPrepare Code of EthicsIdentify CustomerIdentify Customer NeedsIdentify Engineering SpecificationsPrepare Function DecompositionPrepare Affi nity DiagramPrepare Morphological and Pough ChartsConcept SelectionAsses Risks and MitigationSystems Design ReviewReevaluate System DesignSelect Optical SystemSelect Frame SystemPerform optical analysisPerform structural analysisPerform CFD analysisPrepare Bill of Materials Create CAD modelsDetailed Design ReviewReevaluate Detailed DesignOrder Materials

Week 10 Week 11MSD-P13675: Bike Helmet Mirror System Week 5 Week 6 Week 7 Week 8 Week 9