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1. THE APPLICATION OF STOLEN RADIOACTIVE SOURCE
TRACKING SYSTEM BASED ON INTERNET OF THINGS
TECHNOLOGY
This paper introduces a radioactive source tracer anti-theft system, which mainly consists
of Detection probe and Tracker. It is based on RF, GSM and GPS. The system can realize noncontact information acquisition processing for the stolen radioactive source. If there is
unauthorized or illegal movement of radioactive sources, GPS/GSM system which is installed in
the radioactive source tracer anti-theft system starts work automatically, implement monitoring
and tracking function, then regularly to send alarm message to the specified phone number and
PC, and displays the location of the radioactive source, achieves automatic monitoring of
radioactive source management objectives.
Existing System:
In this system, there is no device to monitor and locate the lost objects. Hence its needs a
manual power to control and monitor the objects. So it is very difficult for identifying that lost
objects.
Proposed System:
In this project, we are going to monitor whether object lost or not by using RF
communication. Here the RF receiver is attached with object. If RF receiver does not receive
signal from RF transmitter, the microcontroller in receiver side receives the signal from GPS
value of current location and send the current latitude, longitude value to owner and PC by using
GSM modem.

2. Block Diagram:
Transmitter Section:
Power
Supply
RF Transmitter
Receiver Section:
Power
Supply
Object
LCD
RF Receiver
8051
MAX
Micro
GPS
Receiver
MAX
232
232
Controller
GSM
modem

3. Monitoring Section:
GSM
modem
MAX
232
Hardware used:

8051 Microcontroller.

GSM modem.

LCD

GPS

RF transmitter and Receiver.

MAX232
Software used:

Keil Compiler.

Embedded C.
Advantages:

4. 
We can identify the lost object easily.
Disadvantages:

Network problem.