The Client 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. 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 # 5,505,663: Self- operable transfer system. US patent #4,865,312: Recreational device for physically disabled children.
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
Features con’t. Automated winch hook release. Battery powered (12V DC) Car with three separate harnesses. Winch Hook Release 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. 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 Electrical system’s printed circuit board
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. Transistor switches are used to amplify or stabilize the output signals. Battery Box and plug Red, Yellow, Green LED tower light. Control box with motor drivers and wireless receiver.
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.
Budget $1,385.00 Budget Initially: $1,385.00 Second Budget: $1,685.00 New motor controllers, PCB, wireless module. Total Expenditures: $1760.00 Remaining : -$74.32 (I will do this in the morning)
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