Post on 24-Feb-2016
description
Mobile Environment Chamber
Internal/External SearchTeam members:
Duc TranTuan NgoGiang Nguyen
Peter ElabThien NguyenThe Duong
Advisor:
Dr. Mark Weislogel
Problem Identification
Needs Assessment Objective Requirements Concept
GenerationConcept
Evaluation
Proposal PDS We are here!
OUTLINE
• PDS Review
• External Search
• Internal Search
• Concept Evaluation and Selection
• Conclusion
PDS REVIEW
Chamber
PC Controller
Facility
Actuator
Solid State Drives
Set T
Requirements• Temp. range: -5 oC 105 oC
• Accuracy: ± 2 oC
• Temp. uniformity: ± 4 oC
throughout the chamber
• Ramp rate:10 oC /minute
• Airflow: 0.5 to 5 m/s across
DUT
EXTERNAL SEARCHLiterature/Patent Search
Disk Drive Test Chamber
Socket for Disk Drive Tester
Efficient Air Flow Chamber
De-humidification
EXTERNAL SEARCHLiterature/Patent Search
Disk Drive Test Chamber
U.S. Patent No. 5,851,143
Socket for Disk Drive Tester Efficient Air Flow Chamber De-humidification
EXTERNAL SEARCHLiterature/Patent Search Disk Drive Test Chamber Socket for Disk Drive Tester
Efficient Air Flow Chamber De-humidification
U.S. Patent 6,124,707(Samsung)
U.S. Patent 6,806,700(Pemstar)
EXTERNAL SEARCHLiterature/Patent Search Disk Drive Test Chamber Socket for Disk Drive Tester Efficient Air Flow Chamber
U.S. Patent No. 7,111,211
De-humidification
EXTERNAL SEARCHLiterature/Patent Search Disk Drive Test Chamber Socket for Disk Drive Tester Efficient Air Flow Chamber De-humidification
Compressed dry air
Condensation (from air stream)
Systems Environment chambers
Burn-in chambers
Desktop testers
Temperature -34oC - 100oC Room - 70oC Room
Humidity 5% - 95% RH Room Room
Ramp rate 1oC/minute 1oC/minute none
# of Ports Up to 128 Up to 416 Up to 16
19’’ Rack Mountable No No Yes
Estimated cost $400k $100k $10k
EXTERNAL SEARCHSimilar Product Benchmarking
EXTERNAL SEARCHInterview expert
Dr. Mark WeislogelThermal and Fluid Sciences Group
Thermal & Fluid problem expert
Concept review & suggestion
Thermal analysis guidance
INTERNAL SEARCH
Environmental Chamber
Controller Heating/Cooling Sensors
Direct connect Gateway Counter
Flow Conventional Ther-mistors
Thermo-couples RTD
Concept tree
INTERNAL SEARCHElectrical Components
PID Controller
Heater Temperature sensor Chiller
o Industrial temperature and process controllers
o Automatically adjust outputs based on sensor feedback
o Control process variables: temperature, flow, pressure
and relative humidity
o Real-time communication with PC
o Intel recommended
INTERNAL SEARCHElectrical Components PID Controller Heater
Temperature sensor Chiller
o Wide-range of temperature: 200oC (390F) 1200oC (2200F)
o Selection based on actual mechanical shape and size
o Off-the-shelf heater is preferred (Intel’s inventory)
INTERNAL SEARCHElectrical Components PID Controller Heater Temperature sensor
Chiller
Thermocoupleo Voltage outputo Low accuracyo Very high temp. range
RTD (Resistive Thermal Devices)o Resistance output (metal based)o Below 600 °C rangeo High accuracy and repeatability
(low drift)
Thermistoro Resistance output
(ceramic/polymer based)o Limited temperature range
(−90 °C to 130 °C)o Small package and cheap
INTERNAL SEARCHElectrical Components PID Controller Heater Temperature sensor Chiller
o Re-circulating chillers
o Min temperature: -40oC
o Reservoir Size: 2 Liters
o Intel provided
INTERNAL SEARCHHeating/Cooling Concepts
Technical Problems that designs must address• Heat Flux
• Condensation
• Thermal uniformity
• Airflow requirements
CONCEPT SELECTION
`
Heating Coils(Resistance)
Cooling Coils(Chilled Water)
Circulating FansIntel SSD’s
(Solid State Drives)
Counter flow Design
PROS CONSThermal Uniformity Difficult analysisHeat Flux controllability Condensation riskMaintainable Airflow
CONCEPT SELECTION
Heating Coils(Resistance)
Cooling Coils(Chilled Water)
Intel SSD’s(Solid State Drives)
Low Risk Design
PROS CONSThermal Uniformity Difficult analysisLimit Condensation ManufacturabilityMaintainable Airflow Cost
CONCEPT SELECTIONConventional Design
PROS CONSManufacturability Airflow RequirementsEasy Analysis Condensation risk
Thermal Uniformity
CONCLUSION
• Low Risk Design
• Conventional Design
• Counter flow Design
• Further Plans
1. Continue Analysis on each design
2. Computer Simulation
3. Concept/Design Selection
4. Part Selection
Q & A