TEAM ZISSOU
presents….
“THE LOCATOR”
R. F. LOCATION SYSTEM
MIKE GOULD
KARA MCMILLIN
CHRIS SINKEY
JACOB WILTGEN
MARCUS PEARLMAN
R.F. Location Project
General Design
•
Transmitting Antenna
sends power signals
Receiving
Antennas
Power
• Antenna arrays receive
power signal
Rectifier
• Power is rectified and
amplified
Amplifier
•
DC power signal is
analyzed
68HC11
Microcontroller
•
2-D Location outputs to
Computer, LCD, or PDA
•
Bill Murray still confused.
Transmitting
Antenna
USB
Interface
Project Objectives
Optimal Objective
 Create a fully functional 2D location system
Baseline Objective
 Directional finding antenna
Chip Layout
DATA BUS
Receiver Output
10
RAM
ROM
FPGA
Control lines to
Antenna Array
68HC11
RAM:
•Temporary Receiver
Variables
HC11:
•Controls Antenna
Array Switching
•Interfaces with PC via
USB
•HC11 will read from
external memory.
ROM:
•Software Storage
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
 10-12 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 - 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 Analysis

Possible Uses
• Warehouse Inventory Management
• Small Businesses
• Home
Tracking personal objects
 Tracking animals (dogs, cats, hamsters)

• Monitoring 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?