Microgoniophotometer

By:Team 11541

Sadaf MackertichJeffrey Herbert

Peter BowlinLemuel Lebron

Outline• Project History• Functional Decomposition• Measurement Process• Team Operating Principles• Customer Needs• Specifications• House of Quality• Pareto Chart• Morphological Analysis• Assignment of Tasks• Concepts• Pugh Chart (Concept Selection

Screening)• Risks• Gantt Chart

What is a Microgoniophotometer?

• In layman's terms it is an instrument that measures gloss.

• By reflecting a linear light source off of a glossy object through polarizing lenses, it is possible separate diffuse and specular light, in order to measure the intensity of the “gloss light”.

-100 -80 -60 -40 -20 0 20 40 60 80 1000

0.002

0.004

0.006

0.008

0.01

0.012

0.014

0.016

Current Output-BDRF Curve and Spreadsheet

area 1.329589

whalf 17.49863

w10 36.52839

h 0.014536

rho 0.059832

granularity 0.142416

aperture dim. 34.3502

sigma 10.5506

skewness 1.17668

kurtosis -0.18102

Project History

• Gloss is used as a criterion in industries to evaluate the quality of a product

• Human evaluation = subjective w/ many sources of error

• Solution-- automated device to remove human element and provide results that are:– Objective– Accurate– Consistent

Project History Con’t RIT Imaging Science Dept. had experimental

technology to obtain quantitative measurements of glossCumbersome; not user-friendly

Needed a way to commercialize the process In April 2008, a senior design team started a

prototype that was user-friendly, robust, compact, automated, and reliable

Device was half-completed… we picked up where they left off

Functional Decomposition

Existing Device

Existing Device

LED Bank

Camera F-StopCamera ZoomCamera Focus

Polarizing Lens

Power Supply

Sample Holder

Measurement Process

Automation of Measurement Process

List of commitments•Only commit to do work that we are qualified and capable of doing.•Be honest and realistic in reporting the progress of the project.•Be proactive. Volunteer to an action before the Team Leader has to solicit it.•Notify the Guide of any change to the project plan that may affect us.•Follow through on our individual commitments to the team and accept responsibility for our actions.•Keep other members informed of any potential problem that may affect the team’s performance.•Focus on what is best for the project as a whole.•See the project through the successful completion.

Team Ground Rules•Consider meeting discussions confidential unless indicated otherwise.•Listen openly to other people’s points of view.•Encourage diverse opinions.•Allow everyone the opportunity for participation.•Keep discussions on track.•Avoid placing blame when things go wrong. Instead, review the process and discuss how it could be improved.•Agree on how team members will give and receive feedback•Provide constructive feedback – don’t judge or label the other person but describe a specific behavior or incident.•When you are receiving feedback: listen carefully and try to other points of view.•When planning and solving Problems (technical and team processes): use data (when possible) or consensus. Don’t be a bully or be bullied. Understand the other person’s issue or problem.•During Brainstorming sessions. (Brainstorming may be planned, such as Concept Development, or may be unplanned, as when trying to debug a project subsystem).

Encourage everyone to participate.Never criticize ideas.Think of ideas that are unusual or creativeCome up with as many ideas as possible in the time allowed.Build on other team members’ ideas.

Team Operating Principles

Customer Needs

Specifications

House of Quality

02468

1012

Engineering Specifications

Rela

tive

Wei

ght

(Im

port

ance

)Pareto Chart

Solutions1 2 3 4

Sub Functions

1 Automating sample Holder

Two rollers used to feed the paper around one

rollerUtilize printer roller system

PVC rod stock with holder attached to motor and track to hold sample

against the pvc

Aluminum rod turned and bolted to housing using

motor and track

2Automating

Light Fixture/RGB

Rotating wheel by servo motor. The wheel would

have 3 LED or color lenses to shoot light into cable

Use mirrors in a tunnel towards the fiber optic cable to funnel the light from any LED without

movement

Place rectangular led bank onto a track and move with motor and gear to change

light colorRotating LED wheel

3Automating F-

Stop, Zoom and Focus

Servo motor without micro-positioner, located next to the camera on the

mount

Clamp two semicircular aluminum rings onto f-stop control and with attached bar with track attached to gear and motor assembly

Bore gear and attach around the camera and

place a servo motor next to it with a worm gear

Use easily available hose clamp and worm screw to act as gear and worm gear

4 Automating Polarizing Lens

Lens flip upwards towards camera using a step or

servo

Step motor connected to track on bottom of housing

with rod connecting to polarizing lens rod

Attach track and gear on current system

Pneumatic pressure cylinder mounted in line

with current system

5Light Bar

Polarizing lens holder

Windowed slit for easy replacement Simple hanger holder Rectangular aluminum

stock with slit cut in topBolt small piece of steel

alongside light bar track and attach using magnets

6 Software Integration

Java Plugin with ImageJ Libraries Labview document

7 Housing for Devise

Keep it in a metal box with a flip-up lid

Use plastic as a lighter material Use previous housing

8 Output Display A separate workstation Print out from computer Mounted screen

Assignment of Tasks

Sub Function Number Sub Function Assigned Group Member

1 Automating sample Holder Jeff

2 Automating Light Fixture/RGB Sadaf

3 Automating F-Stop, Zoom and Focus Jeff/Sadaf

4 Automating Polarizing Lens Pete

5 Light Bar Polarizing lens holder Pete

6 Software Integration Lem

Sample Holder Concept

Automating Sample Holder Screening SelectionP11541 Microgoniophotometer

Concepts A B C D Reference

Selection Criteria 2 roller design

Aluminum Rod with sample holder and gear track Printer roller old design

Ease of sample load 0 + + Cost - - - Durability + + + Ease of setting adjustments - + - Repairability + 0 - Reliability - + 0 Sum + 's 2.00 4.00 2.00 Sum 0's 1.00 1.00 1.00 Sum -'s 3 1 3 Net Score -1 3 -1 0Rank 2 1 2 Continue? no yes no no

Selection Screening

Red Green Blue Light Holder Concept 1

Red Green Blue Light Holder Concept 2

Light Fixture Screening SelectionP11541 Microgoniophotometer

Concepts A B C D

Reference

Selection CriteriaRotating Wheel

Rectangular w/ Track mirror enclosed old design

Cost - - + Durability 0 0 +

Ease of setting adjustments + + + Repairability 0 0 +

Reliability 0 0 + Complexity - - +

Automation Enabled + + + Sum + 's 2.00 2.00 7.00 Sum 0's 3.00 3.00 0.00

Sum -'s 2 2 0 Net Score 0 0 0

Rank 2 2 1

Continue? no no yes

Selection Screening

Camera zoom, focus and f-stop control concepts

Camera zoom, focus and f-stop control concepts

Selection ScreeningF-Stop and Zoom Screening Selection

P11541 Microgoniophotometer

Concepts A B C D Reference

Selection CriteriaPinned Rod connection

Gear mounted on camera Gears behind camera

hose clamp and worm gear

Cost + 0 0 +Durability 0 0 0 +Ease of setting adjustments 0 0 0 0Repairability 0 0 0 +Reliability 0 + 0 -Complexity - - 0 +Sum + 's 1.00 1.00 0.00 4.00Sum 0's 0.00 0.00 0.00 0.00Sum -'s 1.00 1.00 0 1Net Score 0 0 0 3Rank 3 2 4 1

Continue? no yes no No – inaccurate

Polarizer with Pneumatic Actuator Concept

Polarizer with Gear/Track Concept

Selection ScreeningAutomating Polarizing Lens Screening Selection P11541 Microgoniophotometer Concepts A B C Ref

Selection CriteriaLens flip up towards camera Actuator

Attach track to bottom of housing and use a rod

Cost 0 - 0Durability - + 0Ease of setting adjustments 0 + 0Repairability + - 0Reliability - + 0Complexity + - 0Sum + 's 2.00 3.00 0.00Sum 0's 2.00 0.00 0.00Sum -'s 2 3 0Net Score 0 0 0Rank 2 1 1

Continue? no yes yes

Existing Device

Tape

Polarizing Sheet Holder Concept

Lightbar Polarizing Lens Holder Screening Selection P11541 Microgoniophotometer

Concepts A B C D Ref

Selection CriteriaMagnetic

AttachmentSimple Hanger

Holder Tape Clamp and bolt

Cost 0 - 0 -Durability + + 0 +Ease of installation 0 - 0 -Repairability + - 0 -Reliability + + 0 +Complexity 0 - 0 -Sum + 's 3.00 2.00 0.00 2.00Sum 0's 3.00 0.00 0.00 0.00Sum -'s 0 4 0 4Net Score 3 -2 0 -2Rank 1 2 3 2

Continue? yes no no no

Selection Screening

Selection ScreeningScreening for Software Concepts

Concepts A B C

Java Plugin in ImageJPerl Script with C++

microcontrollerImageJ and MathCAD

w/ C++ uControllerSelection Criteria ReferenceEase of use + + xEase of Software Integration - + xLibrary Availibility + - xExecution Speed 0 - xMemory Overhead - 0 xEase of GUI creation + - xPortability + 0 xLanguage Ramp-up Time - - xSum + 's 4.00 2.00 xSum 0's 1.00 2.00 xSum -'s 3 4 xNet Score 1 -2 0Rank 1 3 2

Continue? Yes No No

RisksID Risk Item Effect Cause

Likelihoo

d

Severity

Importance

Action to Minimize Risk Owner

1 Interference with motors and housing Fail to automate device Imprecise

measurements 2 2 4 Create precise CAD model Jeff, Sadaf, Pete

2 Fail to incorporate all software aspects

Cannot deliver one simple to use executable

file

Extremely difficult to program within time

frame3 2 6 Meet with software professionals Lemuel

3 Parts fail to meet criteria Fail to automate device Incorrect part was ordered or delivered 1 2 2 Prioritize tasks to limit time loss Sadaf, Pete

4 Sample loader destroys samples

Function of the device is lost Flawed design 1 2 2 Test on thinner paper and create a

factor of safety. Manually controlled. Jeff

5Sample holder fails to keep

sample tight to cylinder surface

Cannot acquire a proper measurement Flawed design 2 1 2 Check prototype and modify as

necessary Jeff

6 Motors fail to operate under normal conditions

Project will be set back until new camera is

purchased

Incorrect choice of motors 1 3 3 Create limits Sadaf, Jeff,

Pete

7 Damage to Circuitry Cannot operate deviceImproper program of

circuitry or water damage

1 3 3 Create cover for circuitry Lemuel

8 LED’s burn outLimits test spectrum

rangeOveruse 1 1 1

Create easy to change LED holders and purchase extra.

Lemuel

9 Seepage of light from LED holder

Improper measurements Flawed design 1 3 3 Place rubber over exposed areas. Jeff, Sadaf,

Lemuel, Pete

10 Camera optics break Project cannot continue Improper installation 1 3 3 Purchase a new camera with known F-Stop

Jeff, Sadaf, Lemuel, Pete

11 Fail to machine parts correctly

Fail to automate machine

Incorrect measurements 2 2 4 Purchase cheap, replaceable parts Jeff, Sadaf,

Pete

Gantt Chart