Robotic Artificial Intelligence Toy (R.A.T.)

1. Robotic Artificial Intelligence Toy (R.A.T.) CPE 4521 Final Design Presentation Presented byShane R. Bright, Erik R. Brown, Wing-Seng Kuan, Micheal T. Singleton April 24, 2001

2. Introduction • Introduction of Team Theseus • Background • Project Objectives • Timeline • Design Specifications • Implementation/Testing of Design • Conclusion & Demonstration

3. Introduction of Team Theseus • Shane Bright— • AI Team Hardware Consultant, • Web Development, • Circuitry Design • Erik Brown— • AI Team Software Development, • Web Development, • Preliminary Circuitry Implementation

4. Introduction to Team Theseus • Wing-Seng Kuan— • Robotics Team Circuitry Consultant • Micheal T. Singleton— • Robotics Team Chassis Design, • Final Circuitry Implementation, • Final Assembly

5. Background

6. Project Objectives The main objective of the R.A.T. is to entertain a pet for an extended period of time without causing injury to the pet, humans, or the surfaces and objects in the area where the toy might be used. Secondary Objectives— Healthy Exercise for Pet Durability Customer Satisfaction

7. Timeline 1/10/2001 – First meeting, established boundaries, outline for the semester 1/22/2001 – Adopted OOPic as microcontroller for project, first chassis design failure 2/14/2001 – MiniZ Race Car chassis adopted as RAT body 2/27/2001 – Critical Design Review 3/24/2001 – OOPic and sonar interfaced, sonar program implemented, chassis assembled

8. Timeline 4/07/2001 – OOPic interfaced with servo, GUIDE v1.0 was coded implementing servo, motors, and sonar. 4/21/2001 – OOPic program GUIDE v1.1 implemented, correcting flaws in guidance system 4/22/2001 – Motor Controller for chassis completed, initial tests show voltage to be too low to power motors 4/23/2001 – Chassis modifications are made to mount sonar and OOPic devices. Motor Controller prototyping and Voltage Doubler failed in implementation.

9. Design Specifications • Physical Specifications • Dimension :5.5” x 2.5” x 2.75” • Weight • 9V battery : 1.7 Oz • Motor Controller : 0.6 Oz • Chassis : 6.8 Oz • Total : 9.1 OZ • Materials : plastic, rubber • Power Requirement • Body : 6V (4 AAA batteries) • OOPIC : 9V (9 V battery)

10. Design Specifications • Performance Specification • Speed : 10 ft/s • Sight : reacts to objects within three feet of sensor • Battery Life : standard life of alkaline batteries • Features : obstacle avoidance and memory in a small, fast package  • Economic Specification • Cost of prototype : $300.00 • Cost (production) : $29.99 (min), $49.99 (max) • Operation costs : price of batteries

11. Software Specifications • To avoid obstacles at a distance within 3 feet of the R.A.T. • To turn the servo the desired direction after seeing an obstacle and needing to turn • To move irregularly while a safe distance from any obstacles • To use the stop-and-go procedure while at a safe distance from any obstacles for some time

12. Software Specifications • To control the forward and backward motion of the motors via the two signal lines connected to the motor controller • To design the controlling interfaces to all hardware required to meet the preceding specifications

13. Design Requirements • The toy must… • Avoid becoming trapped by obstacles or the pet. • Move in a way that interests the pet. • Be durable enough to endure the contact that might occur with obstacles and/or the pet. • Avoid displeasing sounds and visual features. • Meet minimum requirements for battery life, safety, and functional lifetime.

14. Design Alternatives(Motors) • Types: DC motors, Servo motors, other • Motor Considerations: • Torque • Speed • Life • Power requirements, physical size, and price

15. Motor Control Forward Reverse

16. H-Bridge Schematic

17. Voltage Doubler Schematic

18. Design Alternatives(Controller) • Types: PICs, Basic Stamps, Motorola chips, Intel chips • Considerations: • Programming language(s) • Downloading/Debugging methods • Number of I/O Lines • Memory size • Power requirements, physical size, price

19. Design Alternatives(Sensor) • Types: Infrared Range Finders, Bumper Wire Sensors, Temperature Sensors, and Sonar • Considerations: • Beam pattern • Distance range • Interfacing method • Accuracy • Physical size, power consumption, and price

20. Sonar Implementation/Interfacing

21. Implementation of Design AI Team Implementation Plan Step 1: Connect OOPic to sonar done/ok Step 2: Write code to operate sonar done/ok Step 3: Connect OOPic to Servo done/ok Step 4: Write code to operate servo done/ok Step 5: Integrate code samples to control movement done

22. Implementation of Design Robotics Team Implementation Plan Step 1: Build motor controller (H-bridge) done Step 2: Assemble chassis done/ok Step 3: Mount front steering control done/ok Step 4: Mount Servo done/ok Step 5: Mount Motor Controller incomplete Step 6: Mount OOPic done/ok

23. Testing of Design AI Team Test Plan Test 1: Test sensitivity of sonar done/ok Test 2: Test left and right turns done/ok Test 3: Test forward and reverse control done/ok Test 4: Run real simulation in a test area incomplete

24. Conclusion & Demonstration

25. Demonstration Legend FORWARD LED REVERSE LED SONAR SERVO OOPic Controller

26. Questions?