a portable corn stalk strength measurement devicecapstone project presentation: a portable corn...
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Engineering Design Studio | January 2016Prof. Felix Hardmood Beck
A Portable Corn Stalk Strength Measurement Device
Shien Yang LeeEngineering Design Studio | 8 May 2016
»The engineer’s first problem in any design situation is to discover what the problem really is.«The Door
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Problem Definition
$49 bn – value of 2015 US corn crop
5% – proportion of annual US corn crop lost to lodging
18% – fraction of strength variation accounted for by Rind Penetration Resistance
81% – fraction of strength variation accounted for by Stalk Flexural Stiffness
»Design depends largely on constraints.«Charles Eames, 1972
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Typical field conditions
Design Constraints
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Design Requirements and Test Criteria
Portable
Weigh < 5 kg for single-user operation
Fit between 20-inch wide corn rows
Accurate
Account for at least 50% of observed strength variation
Durable
Function reliably under field conditions
Rapid
Collect data on at least 180 plants per hour of testing
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Overall device architecture
Proposed Design
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Device in operation
Proposed Design
»Great design is iteration of good design.«Onur Mustak Cobanli, 2014
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
First-generation design
Design Development
Proof-of-concept
Emphasis on stability and flexibility
Tested in Huxley, IA – November 2015
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Second-generation prototype
Design Development
Revised design
Emphasis on ergonomics and usability
Tested in Vijayawada, India – January 2016
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Third-generation prototype
Design Development
Current design
Emphasis on reliability and manufacturability
Tested in Guntur, India – March 2016
»In God we trust, all others must bring data.«W. Edwards Deming
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Field test of first-generation prototype
Test Results
Approx. 2 weeks post-harvest
Field-modified version of 1st-generation prototype
1 variety, 2 locations
Operator: Shien Yang Lee
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Field test of second-generation prototype
Test Results
Late flowering stage (green stalks)
Second-generation prototype
1 variety, 2 locations
Operator: Shien Yang Lee
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Field test of third-generation (current) prototype
Test Results
Immediately post-harvest
Current prototype
18+ varieties, 2 locations
Operator: Dr. Daniel Robertson
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Discussion & Future Work
Predictive power of stalk flexural stiffness have exceeded expectations
Current prototype provides a portable, accurate, rapid, and durable platform for further validation of model
Large-scale field test planned for the fall
Future work: improving reliability and documentation for manufacturing and use by field personnel
Shien Yang Lee | Engineering Design Studio | 2016Capstone Project Presentation: A Portable Corn Stalk Strength Measurement Device
Acknowledgements
Prof. Douglas CookDr. Daniel RobertsonDr. Michael DavisProf. Felix Hardmood BeckMatt Karau
Monsanto CompanyNYU Abu Dhabi Office of Undergraduate ResearchNational Science Foundation (Grant #1400973)US Dept. of Agriculture (Grant #1008002)
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Shien Yang Lee,[email protected]
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© Shien Yang Lee, New York University Abu Dhabi, 2016
New York University Abu DhabiPO Box 129188Saadiyat IslandAbu Dhabi, United Arab Emirateshttp://nyuad.nyu.edu/en/academics/academic-divisions/engineering.html
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