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Linusteam silver b
Friday, October 19, 12
Introducing Linus:autonomous field liner with 2 home bases
Friday, October 19, 12
Introducing Linus:autonomous field liner with 2 home bases
Look ma, no hands!
Friday, October 19, 12
The Problems:
- time consuming
- human error
- labor intensiveNot precise
the hassle of field-lining
Friday, October 19, 12
The Problems:
- time consuming
- human error
- labor intensiveNot precise
the hassle of field-lining
$1600
$3600 of labor costs/yearFriday, October 19, 12
The Problems:
- time consuming
- human error
- labor intensiveNot precise
the hassle of field-lining
$1600
$3600 of labor costs/year
$2500Linus
Friday, October 19, 12
Customer Feedback:MIT Athletic Maintenance Staff: Christel
“...let’s set it and forget it.”
Friday, October 19, 12
Customer Feedback:MIT Athletic Maintenance Staff: Christel
“...let’s set it and forget it.”
Friday, October 19, 12
Customer Needs
Customer Need Product Attributes
Engineering Specification
Easy and intuitive set-up ease of use
5-10 minutes for full set up
Accurate, geometric field lines accuracy
maximum error of 3 inches
Intended Customers: Athletic Facilities DepartmentsMarket: Sports Field Maintenance
Friday, October 19, 12
The Risks:components tested in the mock-up
Friday, October 19, 12
The Risks:
Accurate Positioning(x, y, phi)
components tested in the mock-up
Friday, October 19, 12
The Risks:
Accurate Positioning Motor Controls
turn left
(x, y, phi)
components tested in the mock-up
Friday, October 19, 12
The Risks:
Accurate Positioning Motor Controls
Communicationturn left
(x, y, phi)
components tested in the mock-up
Friday, October 19, 12
Risk 1: Communicationusing XBees and Arduinos
Friday, October 19, 12
Risk 1: Communication
Complex feedback loopLinus: “Home Base, What’s my angle?”
using XBees and Arduinos
Home Base : “You’re at 2 degrees.”Linus : “Ok, Motor Controls, get me back to 0 degrees.”
Friday, October 19, 12
Risk 2: Accurate Positioning
Stepper motor
Linus’ Photoresistor
triangulation with stepper motors and laser sweeps
Laser
Friday, October 19, 12
Risk 2: Accurate Positioning
Stepper motor
Linus’ Photoresistor
triangulation with stepper motors and laser sweeps
Laser
Friday, October 19, 12
Risk 2: Accurate Positioning
Stepper motor
2 home bases
Linus’ Photoresistor
triangulation with stepper motors and laser sweeps
Laser
Friday, October 19, 12
Risk 2: Accurate Positioning
Stepper motor
2 home bases 2 angles
Linus’ Photoresistor
triangulation with stepper motors and laser sweeps
Laser
Friday, October 19, 12
Risk 2: Accurate Positioning
Stepper motor
2 home bases 2 angles Calculate coordinates
Linus’ Photoresistor
triangulation with stepper motors and laser sweeps
Laser
Friday, October 19, 12
Risk 3: Motor Controls
PositionOrientation
Controls velocity of wheels
Getting from point A to point B
Friday, October 19, 12
Risk 3: Motor Controls
PositionOrientation
Controls velocity of wheels
Getting from point A to point B
Friday, October 19, 12
Risk 3: Motor Controls
PositionOrientation
Controls velocity of wheels
Getting from point A to point B
Friday, October 19, 12
Risk 3: Motor Controls
PositionOrientation
Controls velocity of wheels
Getting from point A to point B
Friday, October 19, 12
What we learned & future steps
Findings Future Steps
sweep too slowhigher speed or high
resolution stepper motors
laser too dim at long distances
more reflective material for laser sweep
need accurate orientation reading
Gyroscope or 2 photoresistors on Linus
Friday, October 19, 12
Thanks!See you in lab!
Friday, October 19, 12
Thanks!See you in lab!
-silver b
Friday, October 19, 12
