“THE LOCATOR” R. F. LOCATION SYSTEM MIKE GOULD KARA MCMILLIN MARCUS PEARLMAN CHRIS SINKEY JACOB WILTGEN TEAM ZISSOU presents….

Power Rectifier Amplifier 68HC11 Microcontroller USB Interface Receiving Antennas Transmitting Antenna R.F. Location Project General Design Transmitting Antenna sends power signals Antenna arrays receive power signal Power is rectified and amplified DC power signal is analyzed 2-D Location outputs to Computer, LCD, or PDA Bill Murray still confused.

Project Objectives Optimal Objective  Create a fully functional 2D location system Baseline Objective  Directional finding antenna

Chip Layout 68HC11 RAMROM DATA BUS Receiver Output ROM: Software Storage RAM: Temporary Receiver Variables HC11: Controls Antenna Array Switching Interfaces with PC via USB HC11 will read from external memory. FPGA 10 Control lines to Antenna Array

Software  Extrapolate data from USB interface  Program computer workstation to locate transmitter using C Receives a bit pattern from each receiving unit, Translates into a vector Interprets vector into a graphical location

Software continued  Output data to screen Interpret data to find a direction within a given boundary Plot directions point for point on Cartesian coordinate 2-D plane

Software Controlled Hardware 1 Antenna Array  68HC11 Microcontroller ► Includes A/D converter, timers  USB interface between 68HC11 and computer workstation  circularly polarized antennas  FPGA chip ► ROM ► RAM

Hardware Antenna Design Details  Transmitting Antenna Design Monopole design, linearly polarized. Receiving Antenna Arrays  Circularly polarized, electrically scanning  Signal Processed by 68HC11 Microcontroller Includes A/D converter Array Schematic not yet finished

Schedule

Division of Labor ► Chris, Marcus, Mike  Design and construction of transmitter, antenna array ► Kara, Jake  Software for receiver switching, vector interpretation, visual output, interfacing between receiver and PC, and differentiating between I.D. tags.

Feasibility  4 Microprocessors 68HC11  4 FPGA’s - $100 (if used)  4 32 K RAM - $5  4 32 K ROM - $5  4 FR4 boards - $5  USB cables ft. ~ $40

Market Analysis  Possible Uses Warehouse Inventory ManagementWarehouse Inventory Management Small BusinessesSmall Businesses HomeHome  Tracking personal objects  Tracking animals (dogs, cats, hamsters) Monitoring hospital patient locationsMonitoring hospital patient locations

Project Risks  Parasitic foreign disturbances Other electronic devices may disturb antennas  Time management No benchmark so may take longer than expected

Additional Functionality  Specific ID Tracking multiple tags  Determining location of objects in 3-D  Finding Shamu

Questions?