“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

TransmittingAntenna

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 ObjectivesProject Objectives

Optimal ObjectiveOptimal Objective Create a fully functional 2D location Create a fully functional 2D location

systemsystem

Baseline ObjectiveBaseline Objective Directional finding antennaDirectional finding antenna

Chip Layout

68HC11

RAM ROM

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.

FPGA10

Control lines toAntenna 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 Software Controlled HardwareHardware

1 Antenna Array1 Antenna Array

68HC11 Microcontroller68HC11 Microcontroller► Includes A/D converter, timersIncludes A/D converter, timers

USB interface between 68HC11 and computer USB interface between 68HC11 and computer workstationworkstation

10-12 circularly polarized antennas10-12 circularly polarized antennas FPGA chipFPGA chip

► ROMROM► RAMRAM

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 LaborDivision of Labor

►Chris, Marcus, MikeChris, Marcus, Mike Design and construction of transmitter, Design and construction of transmitter,

antenna arrayantenna array

►Kara, JakeKara, Jake Software for receiver switching, vector Software for receiver switching, vector

interpretation, visual output, interfacing interpretation, visual output, interfacing between receiver and PC, and between receiver and PC, and differentiating between I.D. tags.differentiating between I.D. tags.

Feasibility

4 Microprocessors 68HC11 4 FPGA’s - 4 @ $100 (if used) 4 32 K RAM - 4 @ $5 4 32 K ROM - 4 @ $5 4 FR4 boards - 4 @ $5 USB cables - 120 ft. ~ $40

Market AnalysisMarket Analysis

Possible UsesPossible Uses• Warehouse Inventory ManagementWarehouse Inventory Management• Small BusinessesSmall Businesses• HomeHome

Tracking personal objectsTracking personal objects Tracking animals (dogs, cats, hamsters)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?Questions?