The document proposes a RF-based boundary detection system to track boats and warn fishermen if they cross boundaries. It uses RF technology to map boundaries and transmit location data and warnings. The system includes an on-board PIC microcontroller, RF receiver and transmitter, LCD display, voice chip, and relays to trigger warnings or notify authorities if boundaries are crossed.

1. RF BASED BOUNDARY
DETECTION SYSTEM

2. Objective
• To track the boats in the high sees and
warn the fishermen, if they cross their
country’s nautical boundary.
• Intimate the navy patrol about the border
crossing boats
• Uses RF technology

3. Introduction
• Today the fishermen suffer from frequent
attacks from neighboring country navy
• The major issue here is unavailability of
location identifying equipments
• Costlier GPS based equipment can not be
afforded by large mass of fishermen

4. Existing System
• There is no on board tracking system
available
• The boundaries are not mapped
• No provision for navy intimation
• Manual surveillance is needed

5. Proposed System
• Completely automatic
• Boundaries are mapped as RF coverage
• Navy intimation facility with local warning
• On board system & Compact
• High accuracy

6. Block Diagram
PIC
Micro
Controller
LCD
RF Rx
Voice
Chip
Speaker
RF Tx
Relay
Motor
MCU

7. Functionality
• RF receiver continuously detects RF data
from base station
• The RF data fed to Micro controller
• Data Displayed in LCD
• If the data can’t reach the boat for certain
time value, the micro controller sends a
warning data
• The warning data is sent through another
RF Transmitter

9. PIC16F877A
• 100,000 erase/write cycle Enhanced Flash
program memory typical
• 1,000,000 erase/write cycle Data EEPROM
memory typical
• In-Circuit Serial Programming™ (ICSP™) via
two pins
• Single-supply 5V In-Circuit Serial
Programming
• Watchdog Timer (WDT) with its own on-chip
RC oscillator for reliable operation

10. RF transmitter
• Using 433 MHz frequency
• Sends emergency messages, when the
pulse rate is abnormal
• Connected to micro controller through
serial port.

11. RF transmitter & Receiver
• TWS 434 – RF transmitter
– Transmitter output is upto 8mW at 433.92 MHz
– 400 foot in outdoor range
– 200 foot in indoor range
– It accept both linear and digital inputs can
operate from 1.5 to 12Vdc.
– HT 12E IC is a 4bit RF Encoder is used.
• RWS 434 – RF receiver
– It accept both linear and digital inputs can
operate from 4.5 to 5.5 Vdc.
– HT 12D IC it is a 4bit RF remote control system

12. ULN2003
• High-voltage, high-current Darlington arrays
feature continuous load current ratings to 500
mA for each of the seven drivers.
• Ideally suited for interfacing between low-
level logic circuitry and multiple peripheral
power loads
• Typical loads include relays, solenoids,
stepping motors, magnetic print hammers,
multiplexed LED and incandescent displays,
and heaters
• The ULN2023A/L have series input resistors
selected for operation directly with 5 V TTL or

13. Relays
• A relay is an electrically operated switch.
Current flowing through the coil of the relay
creates a magnetic field which attracts a lever
and changes the switch contacts. The coil
current can be on or off so relays have two
switch positions and they are double throw
(changeover) switches.
• Relays allow one circuit to switch a second
circuit which can be completely separate from
the first. For example a low voltage battery
circuit can use a relay to switch a 230V AC
mains circuit. There is no electrical
connection inside the relay between the two
circuits, the link is magnetic and mechanical.

14. LCD
• 2*16 alphanumeric display
• Displays the pulse rate
• Driven by micro controller
• Displays the emergency messages

15. Voice Chip

16. Voice Chip
• Single-chip, high-quality voice recording &
playback solution
• No external ICs required
• Minimum external components
• Non-volatile Flash memory technology
• No battery backup required
• User-Selectable messaging options
• Random access of multiple fixed-duration
messages
• Sequential access of multiple variable-duration
messages

17. Software
• Embedded ‘C’
• PICC Lite cross compiler
• PIC Simulator IDE
• USB ICD

18. References