Transcript Team 7: The ARC Slide

TEAM 7: AUTOMATED RETRACTING
COASTER (ARC) SLIDE
BME 4901 Final
Presentation
By: Hillary Doucette,
Stephen Kustra
& Sarmad Ahmad
National Science
Foundation
Katrina Toce
[email protected]
(860) 621-8616
Overview
 ARC Slide Platform
 ARC Slide Car
 ARC Slide Ramp
The Client
•Client: Joey Toce
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Six years old.
42” Tall.
35 pounds.
•Condition: Cerebral Palsy
•Interests: Outdoor activities
•Car seat fitted for his body.
•Needs multiple harnesses to
help maintain upright posture.
Joey testing the car and slide.
Introduction: The Project
•Purpose: To design and
build a coaster slide that Joey
can safely enjoy outdoors.
•Constraints:
• Joey has limited motor
control.
• Back strain for the
parents/operators.
• The car must be able
to retract back to the
top automatically.
Related Products
Step 2 “Extreme Coaster”
US patent #4,865,312:
Recreational device for
physically disabled
children.
US Patent # 5,505,663: Selfoperable transfer system.
Features
 Winch motor with free
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spooling setting
Lift motor and actuator
Tower light indicator
Wireless remote control
Photoelectric sensor
Track on platform
10ft long ramp
Emergency power switch
Lift and Release Mechanisms
Ramp
Features con’t.
 Automated winch hook
release.
Winch Hook Release
 Battery powered
(12V DC)
 Car with three separate
harnesses.
Car
Harnesses
The Electronics
• Motors wirelessly controlled using
a 4 channel RF transmitter and
receiver.
• 40 pin PIC (16F874A) is used as the
controlling unit.
Electrical system’s printed
circuit board
• Microcontroller has 6 inputs :
 4 inputs from the wireless receiver
 1 input from the photoelectric sensor
 1 input from the position switch
4 Button Remote Control
The Electronics
 Motors are powered by a
12V 30A-hr battery.
 A 12V-24V DC step-up
converter is used to power
the 24V LED light using a
12V signal from the DC
battery.
Control box with motor drivers and
wireless receiver.
Battery Box and plug
 Transistor switches are
used to amplify or stabilize
the output signals.
Red, Yellow, Green LED
tower light.
The Photoelectric Sensor
 Powered by 12V DC power supply.
 Sends signal to winch motor to stop when the
infrared light beam is blocked by car wheel.
 Prevents car from being pulled back too far.
The Winch Motor
 Purchased from TRAC
 ½ horse power, 12V DC
supply voltage.
 Free spooling ability.
 When the photoelectric
sensor is not triggered,
winch can be powered in
forward or reverse.
 When the sensor is
triggered, winch remains
off.
Winch and spring hook attachment
The Lift Motor
 ½ horse power.
 12V DC input.
 Controlled by the
wireless remote.
 Motor will turn on when
the photoelectric sensor
is triggered.
 It will turn off once the
limit switch is triggered.
 Lift motor attached to
actuator to lift rear
platform track.
Lift motor
mounted on
platform
underside.
Lift
Mechanism
The Car
 Modified frame of old gait trainer.
 Carrie Seat obtained from NEAT
marketplace.
 Custom sewn navy vinyl seat cover.
 Nylon harnesses included with the
seat.
 Foot harnesses with Velcro straps.
 Side panels made of polyurethane
and covered with Plastic spray paint.
 7 inch wheel diameter with plastic hub
and outer rubber tread.
 Padded arm rests covered with nylon.
The Platform
 35inches high.
 Frame made of pressure
treated lumber and
decking made of
composite wood.
 The front of the platform
track is hinged with 2 10”
T-hinges.
 Side rails to prevent
tipping off platform.
The Track
 10ft long.
 Made of pressure treated
wood.
 Aluminum and wood flares
at the end to help guide
wheels while retraction.
 Able to detach from
platform by removing ¾”
pins.
 Steel plate at platform
interface to attach to
platform.
(I will do this in the morning)
Budget
 Budget Initially: $1,385.00
 Second Budget: $1,685.00
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New motor controllers, PCB, wireless module.
 Total Expenditures: $1760.00
 Remaining : -$74.32
Hinges and
Fasteners
3%
Electrical
Components
53%
Car
16%
Platform Mechanics
13%
Lumber
15%
Acknowledgements
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Dr. John Enderle – UCONN BME Director
James Paolino – UCONN BME Graduate Student
The Toce Family
National Science Foundation
Serge Doyon, Pete Glaude, Rich Bonazza – Uconn Machine Shop
Jennifer Desrosiers, Kerrie Wenzler, Lisa Ephriam
Eric Leknes
Ray Kustra
Mike Doucette
Questions?