23-05-2012, 10:56 AM
Identifying objects using RF transmitters and receivers retrieving the data using GSM
identifying objects.DOC (Size: 83.5 KB / Downloads: 33)
Abstract:
The objective of the project is finding out a injured person or person caught in a battle field using PIR sensors for Rescue operations .if a Injured person or some detected it can be informed using a wireless technology using RF. The Project can be implemented on both 8bit/32bit controller. The system requires a RF Transmitter and Receiver, PIR sensor, GSM, Wireless RF camera.
Working Principle:
A Passive Infrared sensor (PIR sensor) is an electronic device that
Measures infrared (IR) light radiating from objects in its field of view. PIR sensors are often used in the construction of PIR-based motion detectors (see below).
Apparent motion is detected when an infrared source with one Temperature, such as a human, passes in front of an infrared source with another temperature, such as a wall after detecting it will send msg to authorized person.
By using RF Technique we can control the movement of vehicle in the
Specified direction. Microcontroller is used in both transmitter and receiver.
In transmitter section controller is used send the encoding Information through RF TX. In receiver section controller is used to receive the Encoded message and Decode the message accordingly the vehicle is controlled.
All objects emit what is known as black body radiation. It is usually infrared radiation that is invisible to the human eye but can be detected by electronic devices designed for such a purpose. The term passive in this instance means that the PIR device does not emit an infrared beam but merely passively accepts incoming infrared radiation.
Technology Used:
RF Communication:
Radio Frequency communication uses radio waves with different modulation techniques for wireless communication between two devices which may be very near to each other or hundreds of kilometers apart. Generally we use operating frequency of 433.92MHz for short distance communication.
Hardware Requirements:
Transmitter Section
PC, TV tuner card, RS232.
Microcontroller (AT89S52).
RF Transmitter and RF Encoder.
Power Supply, LCD (2*16).
Receiver Section
PIR Sensor, Motor Driver Circuit.
Microcontroller (AT89S52).
RF Receiver and RF decoder.
LED, RF Camera.
GSM modem.
Power Supply.
Software Requirements:
Embedded C.
Pro Load.
KEIL micro vision 3.
APPLICATIONS:
It is used in the War fields.
It is used in the Remote Places.
It is used to know the Alive of Human in proximity of forest.