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Team 7: Automated Retracting Coaster (ARC) Slide

BME 4901 Final Presentation By: Hillary Doucette, Stephen Kustra & Sarmad Ahmad. National Science Foundation Katrina Toce djtkmt@cox.net (860) 621-8616. Team 7: Automated Retracting Coaster (ARC) Slide. Overview. ARC Slide Ramp . ARC Slide Platform . ARC Slide Car. The Client.

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Team 7: Automated Retracting Coaster (ARC) Slide

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  1. BME 4901 Final Presentation By: Hillary Doucette, Stephen Kustra & Sarmad Ahmad National Science Foundation Katrina Toce djtkmt@cox.net (860) 621-8616 Team 7: Automated Retracting Coaster (ARC) Slide

  2. Overview • ARC Slide Ramp • ARC Slide Platform • ARC Slide Car

  3. The Client Joey testing the car and slide. Client: Joey Toce 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.

  4. 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.

  5. Related Products Step 2 “Extreme Coaster” US Patent # 5,505,663: Self-operable transfer system. • US patent #4,865,312: Recreational device for physically disabled children.

  6. Features • Winch motor with free 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

  7. Features con’t. • Automated winch hook release. • Battery powered (12V DC) • Car with three separate harnesses. Winch Hook Release Car Harnesses

  8. The Electronics • Motors wirelessly controlled using a 4 channel RF transmitter and receiver. • 40 pin PIC (16F874A) is used as the controlling unit. • Microcontroller has 6 inputs : • 4 inputs from the wireless receiver • 1 input from the photoelectric sensor • 1 input from the position switch Electrical system’s printed circuit board 4 Button Remote Control

  9. The Electronics Control box with motor drivers and wireless receiver. • 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. • Transistor switches are used to amplify or stabilize the output signals. Battery Box and plug Red, Yellow, Green LED tower light.

  10. 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.

  11. 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

  12. The Lift Motor Lift motor mounted on platform underside. • 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 Mechanism

  13. 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.

  14. 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.

  15. 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.

  16. (I will do this in the morning) Budget • Budget Initially: $1,385.00 • Second Budget: $1,685.00 • New motor controllers, PCB, wireless module. • Total Expenditures: $1760.00 • Remaining : -$74.32

  17. Acknowledgements • 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

  18. Questions?

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