13-09-2013, 03:06 PM
The Wireless Bomb Disposal Robot
Wireless Bomb Disposal .docx (Size: 590.07 KB / Downloads: 106)
Objectives
Provide a remote monitoring and controlling application for analysis of auspicious packet.
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 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 Radi 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.
Major Inputs and Outputs
Input Signals
Video Feedback
Movement of Robotic Arm
Movement of Base
The control data from the transmitter is sent to Wireless Transmitter then transmitted to the receiver installed on the base of the robot.
System Context
Mobile Robots reduce or eliminate a bomb technician’s time on target a robot takes risk out of potentially deadly scenarios and lets the bomb technician focus on what to do to an explosive device rather than on the immediate danger to life.
Theoretical Background of the Project
The bomb disposal robot 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.
Although the idea of our topic is original, a number of with similar functionalities can be found. For Example the British Police have a bomb disposal robot, the Israeli Army has 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 detector sand 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.
Technology & Tools Used in the Project
The robot that we have made is a command and control robot. This robot takes commands from the user in the form of control signals and performs the required action. The central idea behind this robot is to provide a line of defense to a bomb disposal squad against the life threatening risk, faced by them in the event of an explosion. It provides the squad a safe distance to dispose off a bomb, which he normally has to do with his bear hands
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. A Micro controller consists of a powerful CPU tightly coupled with memory, various I/O interfaces such as serial port, parallel port timer or counter, interrupt controller, data acquisition interfaces-Analog to Digital converter, Digital to Analog converter, integrated on to a single silicon chip.
If a system is developed with a microprocessor, the designer has to go for external memory such as RAM, ROM, EPROM and peripherals. But controller is provided all these facilities on a single chip. Development of a Micro controller reduces PCB size and cost of design.
One of the major differences between a Microprocessor and a Micro controller is that a controller often deals with bits not bytes as in the real world application. Intel has introduced a family of Micro controllers called the MCS-51.
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 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.
Joystick Control
The joystick control has been used to control the robotic arm. This mechanism works by taking the position of the joystick, converting into an appropriate signal and providing it to the transmission module for transmission to the robot. It is not responsible for the generation of the signals. Its job is to process the input from the joystick, process it and provide it to the control application for further processing.
Conclusion
The Wireless Bomb Disposal Robot has been designed in such a way that it can cater to the needs of the bomb disposal squad, the military, and the police and also of the personnel who handle radioactive materials It has countless applications and can be used in different environments and scenarios. For instance, at one place it can be used by the bomb disposal squad,while at another instance it can be used for handling mines. While another application can be to provide up to date information in a hostage situation.