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

ApplicationsIntroduction

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

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Block Diagram


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Hardware Requirements 8051 series Microcontroller

Push Button DC Motors Relay Transistor Robot Body with Water Tank Resistors Capacitors Diode Battery Bluetooth Device


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Software Requirements

Keil compiler

Languages: Embedded C or Assembly

Android Application


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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.


Applications

Different components used are as follows:






Project components2. 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).


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http://wiki.pinguino.cc/index.php/File:Bt_module.jpg


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.


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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.


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RF Remote Control The circuit uses HT 12E, HT 12D encoder and decoder.

433MHz ASK transmitter and receiver is used for the remote control.


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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


ApplicationsFeatures 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


ApplicationsFeatures 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.


ApplicationsRF 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.


ApplicationsRF 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.


ApplicationsMotor 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.


ApplicationsMotor 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.


ApplicationsOperation of Motor Driver







If enable 1 and pin number 2 are low leaving pin number 7 as high then the motor rotates in reverse direction.



ApplicationsOperation 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.


ApplicationsDesigning the RobotThe robotic vehicle consists of the following units:






Types of Fire Fighting Robotic Vehicles

Home Fire Fighting Robotic Vehicle

Industrial Fire Fighting

Forest Fire Fighting


ApplicationsDesigning the Robot

http://www.edgefxkits.com/fire-fighting-robotic-vehicle








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.








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.








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.


ApplicationsWorking 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.








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.








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.








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


ApplicationsAdvantages






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


ApplicationsDisadvantages






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.


ApplicationsApplications







ApplicationsConclusion 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.

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Engineering

Fire fighting robot remotely operated by android applications