Fire fighting robot remotely operated by android applications

Fire Fighting Robot
Remotely Operated by
Android Applications

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Fire Fighting Robot Remotely
Operated by Android Applications
Introduction
 The project is designed to develop a fire fighting robot using android
application device for remote operation. The robotic vehicle is loaded with
water tanker and a pump which is controlled over wireless communication
to throw water. An 8051 series of microcontroller is used for the desired
operation. At the transmitting end using android application device,
commands are sent to the receiver to control the movement

Block Diagram

Hardware Requirements
 8051 series Microcontroller
 Push Button
 DC Motors
 Relay
 Transistor
 Robot Body with Water Tank
 Resistors
 Capacitors
 Diode
 Battery
 Bluetooth Device

Software Requirements
 Keil compiler
 Languages: Embedded C or Assembly
 Android Application

Project components
1. ATMEGA8L-8PU Microcontroller
 The AVR is a modified Harvard architecture 8-bit RISC single chip
microcontroller developed by Atmel.
 It uses on chip flash memory for program storage
 It is a High-performance, Low-power AVR 8-bit Microcontroller with 130
Powerful Instructions - Most Single Clock Cycle Execution.
Different components used are as follows:

Project components
2. HC-05 Bluetooth Module
 The HC-05 small size Bluetooth TTL transceiver module are designed for serial
communication (SPP - serial port profile).
 It allows your target device to both send or receive TTL data via Bluetooth
technology without connecting a serial cable to your computer.
 It has Coverage up to 30 ft / 10 m with Built in antenna.
 It has Power input: +3.3VDC (Bluetooth module).

Development of Android APP
 Android is an Open Source operating system based on the Linux Kernel
 Designed primarily for touchscreen mobile devices such as smartphones
and tablets.
 It was built to be truly open.
 For example, an application can call upon any of the phone’s core
functionality such as making calls, sending text messages, or using the
Bluetooth, camera etc.

Bluetooth
APIsUsing the Bluetooth APIs, an Android application can perform the following:
 Scan for other Bluetooth devices
 Query the local Bluetooth adapter for paired Bluetooth devices
 Establish RFCOMM channels
 Connect to other devices through service discovery
 Transfer data to and from other devices.

RF Remote Control
 The circuit uses HT 12E, HT 12D encoder and decoder.
 433MHz ASK transmitter and receiver is used for the remote control.

 Range in open space(Standard Conditions) : 100 Meters
 RX Receiver Frequency : 433 MHz
 RX Typical Sensitivity : 105 Dbm
 RX Supply Current : 3.5 mA
 RX IF Frequency : 1MHz
 Low Power Consumption
Features of
RF

 Easy For Application
 RX Operating Voltage : 5V
 TX Frequency Range : 433.92 MHz
 TX Supply Voltage : 3V ~ 6V
 TX Out Put Power : 4 ~ 12 Dbm
Features of
RF

 The HT 12E Encoder ICs are series of CMOS LSIs for Remote Control system
applications.
 They are capable of Encoding 12 bit of information which consists of N
address bits and 12-N data bits.
 The HT 12D ICs are series of CMOS LSIs for remote control system
applications.
 This ICs are paired with each other.
RF Encoder & Decoder

 For proper operation a pair of encoder/decoder with the same number of
address and data format should be selected.
 The Decoder receive the serial address and data from its corresponding
decoder, transmitted by a carrier.
 Using an RF transmission medium and gives output to the output pins after
processing the data.
RF Encoder & Decoder

 L293D is a dual H-bridge motor driver
integrated circuit (IC).
 Motor drivers act as current amplifiers
since they take a low-current control
signal and provide a higher-current signal.
 This higher current signal is used to drive
the motors.
Motor Driver L293D

 L293D contains two inbuilt H-bridge driver circuits.
 In its common mode of operation, two DC motors can be driven
simultaneously, both in forward and reverse direction.
Motor Driver L293D

 L293D has 2 set of arrangements where
one set has input 1, input 2, output 1
and output 2 and other set has input 3,
input 4, output 3 and output 4, according
to block diagram if pin no 2 & 7 are high
then pin no 3 & 6 are also high.
 If enable 1 and pin number 2 are high
leaving pin number 7 as low then the
motor rotates in forward direction.
Operation of Motor Driver

 If enable 2 and pin number 10 are high leaving pin number 15 as low
then the motor rotates in forward direction.
 If enable 1 and pin number 2 are low leaving pin number 7 as high then
the motor rotates in reverse direction.
 If enable 2 and pin number 15 are high leaving pin number 10 as low
then the motor rotates in forward direction.
Operation of Motor Driver

 A rectangular base to support the whole robot structure, attached to two
wheels for motion.
 A couple of DC motors to provide required movement to the robot.
 A control unit consisting of an RF receiver which receives command
signals from a transmitter unit to control the engine driver and control the
motors accordingly.
 A metal detector circuit along with a buzzer alarm which triggered once
the metal detected.
Designing the Robot
The robotic vehicle consists of the following units:

Types of Fire Fighting Robotic Vehicles
 Home Fire Fighting Robotic Vehicle
 Industrial Fire Fighting
 Forest Fire Fighting
Designing the Robot

Designing the Robot
Home Fire Fighting Robotic Vehicle:
 The field action constrained on the current Flore of house.
 This robot is using many house hold items catch fire when someone is
asleep or away.

Designing the Robot
Industrial Fire Fighting:
 Most of the industries are faced fire accidents problems like gas, petrol,
nuclear power plants, chemical industries huge amount of damage.
 And more number of peoples is dead near surrounding areas.
 This robot has the strength to carry a fire around inside burning area to
supply unlimited water.

Designing the Robot
Forest Fire Fighting:
 Forest Fires is very dangers.
 It can be a short time burning large amount of forest area.
 Even city fire departments have to deals with forest fires in the area
surrounding city.

 The project uses HT12E Encoder which converts 4 bit data to serial
output which is then fed to the RF module.
 For transmitting the same to be received by the receiver RF module the
output of which is fed to HT12D the serial decoder I.
 The output of which is fed to controller.
 The transmitting end MC is connected to a set of pushbutton.
Working Principle

 Thus while a particular button is pressed the program executed delivers
corresponding 4-bit data which are then transmitted serially at port 1.
 The data so received at the receiver end of port 1 operates the motor
through motor driver IC L293D as required being interfaced from the
Microcontroller output port 2.
 The transmitter is powered by a 6v battery in series with a silicon diode
to finally develop required voltage for microcontroller circuit.
Working Principle

 The receiver is powered by a 12v battery in series with a silicon diode to
protect the circuits from accidental reverse battery connection.
 5V DC out of the 12V available from regulator IC 7805 is fed to the
controller, decoder, the motor driver IC L293D pin 8 for operation of the
motor.
 The receiving unit uses one more motor driver IC L293D for driving one
DC Motor for arm operation with a boom mounted on its shaft.
Working Principle

 At the end of the shaft a nozzle is connected to a water tanks mounted
water pump which is powered from “NO” contacts of a relay that is
driven by transistor Q1 from the output of MC pin 15.
 Thus in the event of a fire the robotic vehicle is moved over to the
location by operating the left, right, forward & backward button etc.
 After it reaches the site the nozzle mounted motor takes position
through the water on the fire from the water tank mounted DC pump
actuated by the relay RL1.
 Thus the fire can be extinguished.
Working Principle

 Capability of sensing accurately with increased flexibility
 No line of sight Not blocked by common materials.
 It can pass through solids Longer range
 Not sensitive to light
 Not sensitive to weather conditions
Advantages

 Communication devices mostly use similar frequency, so interference
occurs if the address are not specified.
 High cost.
 Data rate transmission is lower than wired transmission.
 It cannot be work beyond the limit
Disadvantages

Industries are using RF solutions:
 For monitoring, control, process, inventory tracking, data links and bar code
reading devices.
Consumer products:
 Electronic toys, home security, gate and garage door openers,
intercom, fire and safety systems, and irrigation controllers.
Medical products:
 Patient call and monitoring, handicap assistance device, surgery
communication system, remote patient data logging and ECG
monitor.
Applications

Conclusion
 Fire Fighting Robot Remotely Operated by Android Applications was designed and
implemented For fire monitoring, control, process, inventory tracking, data links
and bar code reading devices. the project can be enhanced by interfacing it with a
wireless camera so that the person controlling it can view operation of the robot
remotely on a screen.

Fire fighting robot remotely operated by android applications

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Fire fighting robot remotely operated by android applications