P16551: Observer Calibrator. Antonio DoVale, Ben Grotton, Kevin Kruse, Alex Skinner, Zhen Zhou

Transcription

1 P16551: Observer Calibrator Antonio DoVale, Ben Grotton, Kevin Kruse, Alex Skinner, Zhen Zhou

2 Agenda Review and Update Background review Customer requirement Functional decomposition Functional mapping Subsystem Design Ergonomic feasibility Decision of light source Decision of microcontroller Decision of mixing module Software oversee Housing/ Mixing module design Other Analysis Bill of materials Budget estimation Test plan Risk assessment Project week 12 schedule

3 What is the Observer Calibrator? The Observer Calibrator is an instrument that can measure slight differences in human color perception. Contains two arrays; each comprises 4 different colored LEDs which are blended together to generate millions of colors. The LED arrays are controlled using MATLAB.

4 Current product- Observer Calibrator Current weight and size are too big Hard to transport Difficult to use (poor user-interface) Low illumination level Poor housing structure

5 Problem Statement Summary Project Goals: Analyze current prototype Develop working model of OC instrument Desired Functional Improvements: Brighter Easier to use Portable Interchangeable optical front end Additional Requirements: Complicit with FDA/RIT human subject testing regulations Available documentation for continued support in RIT color science research

6 Customer Requirements and Needs Safe luminance levels

7 Customer Requirements and Needs (Cont.)

8 Subsystem Functional Decomposition

9 Subsystem Functional Mapping Send Signal to Each Primary Send Signal to Each Primary Mix Light Colors Send Light Through Aperture Send Light Through Aperture Send Light Through Aperture Send Light Through Aperture Send Signal to Each Primary Output Results Display Current Energy Levels, Compare Energy Levels Meet Observer Eye Level Meet Observer Eye Level Mix Light Colors

10 Ergonomic Feasibility Analysis - Stand Adjustable height (minimum) = = 5.4 inches (Wickens Table of Anthropometric Data)

11 Ergonomic Feasibility Analysis - Stand

12 Ergonomic Feasibility Analysis - Stand Bottom Top Selection Criteria X stand Tripod I beam Folded Clip Screws Panel Angle adjustment N N Height adjustment Dimension adjustable N N Weight support (>20lb) N Stability Score Continu?

13 Decision Making for Light Sources The graph to the right shows regions of greater perception differences among different observers One set of LEDs should lie within these high variability regions A HAND CALIBRATOR FOR COLOR VISION OF A HUMAN OBSERVER Patrick Morvan, Abhijit Sarkar, Jurgen Stauder, Laurent Blondé, Jonathan Kervec, Hasan Sheikh Faridul

14 Decision Making for Light Sources

15 Decision Making for Microcontroller Purchase Plan: Through Progressive Automations for $47.50 Purchase Plan: Through Adafruit for $17.50

16 Decision Making for Mixing Module: Make vs. Buy Pros for Make: Cost (cheaper to make the part) Need for specific aperture diameter Control of lead time/improved quality control Pros for Buy: Suppliers specialized know-how / advanced manufacturing techniques Lack of expertise Small-volume need

17 Potential Suppliers: Integrating Sphere

18 Software Overview & Flowcharts Will use Matlab s Support Package for Arduino to send commands to the PWM ports and control the LEDs Ex: writepwmdutycycle, writepwmvoltage Will probably write some programs to process commands Could be tailored to use cases (observer color adjustment vs. researcher color adjustment)

19 Software Flowcharts (continued)

20 Design Drawing of Housing Iso Top View (Front - Top Removed) Iso Top View (Rear - Top Removed)

21 Design Drawing of Integrating Sphere Twin Integrating Spheres (Front iso view) Twin Integrating Spheres (Rear iso view)

22 Full Housing/Mixing Module Design

23 Preliminary LED Prototyping

24 Prototype Schematic

25 Prototype Simulation

26 LED Prototyping: Moving Forward

27 LED Prototyping: Moving Forward (Cont.)

28 Bill of Materials

29 Budget Estimation Assumptions: RIT MATLAB License for Academic Use Items in green are fully priced out Items in orange are estimates

30 Test Plan - Luminance Levels We need to ensure we achieve the requisite luminance levels with each LED The Program of Color Science has labs for us to test this Each LED should reach 15 cd/m2 at maximum output level Software-side adjustments may be needed to keep the output levels within reasonable luminance levels

31 Risk Assessment

32 Schedule for Week 12 Task Duration Start Finish Phase 1 - Problem Definition 21 days 1/26/2016 2/9/2016 Phase 2 - System Design 21 days 2/10/2016 3/2/2016 Phase 3 - Subsystem Design 28 days 3/3/2016 3/29/2016 Phase 4 - Detailed Design 21 days 3/31/2016 4/19/2016 Resource 1 Refine Customer requirement 7 days 3/31/2016 4/7/2017 Team 2 Refine risk assessment (high/medium technical risk) 7 days 3/31/2016 4/7/2017 Team 3 Update schedule 3 days 4/13/2016 4/16/2016 Team 4 Verify readiness 3 days 4/11/2016 4/14/2016 Team 5 System architecture subsystems address all needs 3 days 4/11/2016 4/14/2016 Team 6 Detailed drawings, schematics, flow charts 7 days 4/11/2016 4/17/2016 Team 7 Feasibility analysis simulations, prototyping 7 days 4/11/2016 4/17/2016 Team 8 7 days 4/11/2016 4/17/2016 Team 9 Detailed BOM review against budget Communicate with Customer for Suggestions 1 day 4/18/2016 4/18/2016 Dr. Fairchild 10 Upload Everything to EDGE 1 day 4/18/2016 4/18/2016 Team 11 Detailed Design Review 1 day 4/19/2016 4/19/2016 Team

33 Questions?