Transcript ece791oarbendx

Jonathan Dwyer
Kenneth Weigel
Eric Donovan
Project Advisor: Wayne Smith PhD.
Presentation Date: 10/27/2011
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No objective method of determining rowing
efficiency
No simple, objective method of comparing
rowing effectiveness between rowers
All methods of boat selection rely on subjective
determinations of speed
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Oar Blade: The “paddle-face” of the oar.
Oar Shaft: The long, cylindrical midsection of
the oar.
Oar Collar: The portion of the oar that sits
within “Oar Lock.” Fulcrum.
Oar Lock: Portion of rigger that fixes oar to the
rigger.
Rigger: Attaches the boat and the Oar Lock.
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“The Catch”: The blade’s placement into the
water, ideally enters at the speed of the water.
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“The Drive”: Portion of stroke with most
power application. This is where the peak
bend rating will occur.
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“The Release” – Blade pressure lessens, oar
shaft straightens, blade pushes back on water,
causing air pocket to form allowing for easy
blade extraction.
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Use a strain gauge to measure bend of the oar
during execution of stroke
Program microcontroller to store and
manipulate bend readings
Store values on external memory, transmit to
cable-connected iPod (real time), display on
LCD (real time)
Program to allow after-the-fact performance
analysis
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Start/Stop
Timed “pieces” functionality (i.e. stationary
bike)
LCD displays strokes per minute, average bend
rating, time remaining/elapsed, most recent
bend rating (rating of previous stroke)
iPod shows LCD’s information in real time to
coxswain
On-pc program will display graphs and data
tables allowing for post-practice analysis
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Coach can view data of multiple rowers from
multiple pieces to determine work ethic,
efficiency, power
Allows for objective comparison between
athletes (avg. rating vs. avg. rating)
Coxwains can evaluate rowers based on data,
allowing for more relevant feedback
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Strain gauge epoxied onto oar shaft
Wire connects gauge output to integrated circuit
for voltage scaling, amplification, and noise
reduction
Integrated circuit feeds into microcontroller
Microcontroller connects in serial to LCD for
display
Microcontroller output connects via adapter to
iPod
Microcontroller output connects to external
memory via USB port
External memory will connect back to home
computer for post-workout efficiency analysis
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ECE541, ECE548, ECE617, ECE618, ECE651 –
analog circuit design
ECE562, ECE583, ECE649 – microprocessor
design and implementation
PHYS407, PHYS408 – basic mechanics analysis
ECE633, ECE634, ECE714, ECE757 – filter
design and communications systems
CS415, CS416, CS515, CS516 – object orientated
programming, software design
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Difficult-to-analyze voltage readings
Bend gauge durability
Interfacing iPod to Arduino microcontroller
Determining scaling circuit amplification
parameters
Storage of values onto external memory
Operational efficiency (memory)
Open source technology can cause unexpected
problems (not to “industry grade”)
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1 Arduino Mega 2560
1 Phi-2 Interactive Shield Kit (Display)
1 iOS Developer Program License
5 Inventables Bend Sensor
1 Gorilla Glue 8 fl. Oz All-Purpose Adhesive
1 Redpark Serial Cable for iOS w/ P4 Serial Adapter
1 Used Sweep Oar, Blade Design Irrelevant
1 Wire Lead Package
1 DB9 M/F Null Modem Adapter
1 VDip1 Adapter
1 USB Key (“flip drive”)
Power Supply
Total Cost
= $58.95
= $29.95
= $99.00
= $64.75
= $10.97
= $66.00
= $50.00
= $10.00
= $09.99
= $35.00
= $20.00
= $05.00
= $459.61