1. ECE 477 Design Review Group 10  Spring 2005 I, Robotic Waitress
Kevin Muthuri Jer-Wei Lam(Sean) Jacinto Chang Ming Sum Wong
Web:

2. Outline Project overview Project-specific success criteria
Block diagram
Component selection rationale
Packaging design
Schematic and theory of operation
Preliminary PCB layout
Software design/development status
Project completion timeline
Questions / discussion

3. Project Overview Robotic Waitress project
Deliver food to designated table autonomously
Comprises of two major components – robot and control center
Tables’ coordinates file stored on the PC allows remote control of the robot from control center
Robot’s navigation algorithm enables smart table-to-table navigation
Avoid obstacles using IR sensors

4. Project-Specific Success Criteria
Ability to control robot motion wirelessly w/ control center using RF
Ability to avoid obstacle collision in the robot’s path using IR sensors
Ability to display robot status on LCD display
Ability to navigate using tables’ coordinates file that can be updated
Send alerts from robot to control center wirelessly using RF

5. Block Diagram

6. Component Selection Rationale
Microcontroller – ATmega32
LCD – Hitachi controller based
PWM driven modified Servo motor
Digital Sharp GP2D15 IR Sensor
418Mhz 315Mhz RF Tx/Rx
Power Supply – 4.8-6v Servo
Power Supply – 5v to board

7. Packaging Design Robot: Mark III Robot Chassis
2 Wheels, wedge for support
Bright RED wheels
8 inch-diameter round tray
Custom mount for LCD display
Robot base approx 5” X 4”
Control Center:
RadioShack Project Box
Size approx 3” X 2” X 1”

8. CAD - Packaging

9. Schematic/Theory of Operation
Overview of Main Module Schematic

10. Schematic/Theory of Operation

11. Schematic/Theory of Operation

12. Schematic/Theory of Operation
LINX TXM 418/315 LC
LINX RXM 418/315 LC-S

13. Schematic/Theory of Operation

14. Schematic/Theory of Operation
Control Center Module

15. Preliminary PCB Layout

16. Software Design/Development Status
Overall Functionality:
Provide a user-friendly interface to monitor the status of the robot and to instruct the robot
Able to generate a set of instructions to guide the robot to the designated table(s)
Allow user to set locations of the tables
Able to re-route the robot from its current location

17. Software Design/Development Status
Completion of user interface and navigation algorithm
Ability to send and receive data through serial port
Ability to load the tables’ coordinates file

18. Software Design/Development Status
Screenshot:

19. Project Completion Timeline
Before Spring Break (Week 8 & 9) :
Finish prototyping the RF module and test its functionality
Finish the PCB layout
Test tilt sensors and finish motor control program
Program the microcontroller for communication with the software
Test direct communication between the software and the microcontroller without RF
Week 11:
Communicate between the software and the microcontroller with RF
Finish the coding of the software and hardware
Week 12 & 13:
Complete testing and debugging the project in real environment
Week 14:
Finish the packaging and user manual

20. Questions / Discussion