13-02-2013, 04:24 PM
Final Year Project Report WIRELESS BOMB DISPOSAL ROBOT
WIRELESS BOMB .pdf (Size: 738.83 KB / Downloads: 154)
Introduction
Goals and Objectives
The main goal of the project is to provide safety to the bomb disposal squad by
providing an extra line of defence.
Objectives:
· Provide a remote monitoring and controlling application for analysis of a
suspicious packet (or bomb).
· Allow the user to manipulate the packet using the robotic arm.
· To provide visual feedback from the site of the packet.
· To provide a very user-friendly control application.
System statement of scope
The Wireless Bomb Disposal Robot uses a control application, at the user end to
control the robot remotely using Wireless technology. The bomb technician
controls the robot using this application. Input from the user is transmitted
serially over an RF link to the Robot, where it is received, identified and relayed
to the appropriate module.
· The input to the system is from the user.
· This input is first processed at the control application, serially transmitted
over a Radio Link. This input is then received at the robot and processed
again.
· The output of the system is the processed signal to the appropriate module.
This module can be a motor of the base of the robot or the robotic arm.
Theoretical background of the Project
The project has been designed keeping in view the current law and order
situation in Karachi and throughout the world. Everyday hundreds of trained
personnel are either injured or lose their lives while defusing bombs. This can be
reviewed by the countless number of news items appearing daily in newspapers
around the world. These include the Daily DAWN of 19th JAN 2004 [1].
Another news item points to a similar story in India [2].
Although the idea of our project is original, a number of projects with similar
functionalities can be found. For Example the British Police have a bomb
disposal robot, the Israeli Army have it and it is also being used by bomb
disposal squads and a number of states of USA.
The main idea of this robot is to provide the bomb disposal squad with safety
and security from the risks that they face every day. The bomb disposal squad of
Karachi has metal detectors and other equipment for bomb detection and
disposal, but they have to risk their lives by approaching the bomb or the
suspicious packet without any safety and precautions. Our robot provides an
extra layer of protection to the bomb disposal squad by allowing them to check
and analyse a suspicious packet before actually approaching it for disposal.
Technology & Tools used in the Project
· ATMEL 89C51
The Atmel 89C51 microcontroller is used for the controlling the robot. We
have termed it the brain of our robot. The reason for choosing this
microcontroller is its reliability and availability. Moreover it has three data
ports, which are used for controlling of the different components of the
robot.
· 5804B Stepper Controller
For the robotic arm we have used two uni-polar stepper motors. The 5804B
is a uni-polar stepper motor controller, which generates all the necessary
signals to control and run the stepper motor. It also has an enable pin for
turning on/off the motor and a direction pin for changing the direction.
Using the IC saves the number of port pins of the microcontroller, which can
be used for other purposes. It also provides the appropriate current
(maximum 1.2A), which is required to generate the appropriate torque by the
motor.
· Relays for DC Control
A 12volt DC relay is used to control the DC motor from the signals of the
microcontroller. A 12volt relay instead of a 5volt relay has been used to
provide isolation to the microcontroller from the DC motor, which can
damage the controller by drawing large current.
· 4N25 Optocoupler
The 4n25 optocoupler provides isolation to the microcontroller for driving
the relay of the DC motor. It consists of gallium arsenide infrared LED and a
silicon NPN phototransistor.
· ULN2003
The ULN2003 Darlington array IC has been used for interfacing between
low-level logic circuitry and high power loads, the DC Motor.