intellegent bluetooth robo

INTELLEGENT BLUETOOTH ROBO

PRESENTATION BY: MANU MITRA A.PRASAD BABU CH.MAHIPAL REDDY INTERNAL GUIDE: JAMUNA GARU

Objective 

This project deals with one of the applications of robotics. In this project one moving object is developed which is controlled by Bluetooth technology and able to detect metal, smoke, L.P.G. gas, temperature.

INTRODUCTION 

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It is quite recently that robots have started to employ a degree of Artificial Intelligence in their work - many robots required human operators, or precise guidance throughout their missions. Slowly, robots are becoming more and more autonomous.

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Robotics is an absolutely fascinating field that interests most people. Robot is a system that contains sensors, control systems, manipulators, power supplies and software-all working together to perform a task. Robot should have Sensing, Movement, Energy and Intelligence characteristics

About Project….. 

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This project deals with one of the application of robotics. In this project one moving object is developed which is controlled by Bluetooth technology and able to detect metal automatically.

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In order to detect the metal, metal detectors were used. Micro controller along with the driver circuit is provided to run the stepper motor. According to the signal from Bluetooth device robot follows the path, which is driven by a stepper motor.

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All the obstacles in its path are detected using IR sensors and reported to the host system. This project is equipped with Stepper motor, metal detector, IR Sensors, Blue tooth device, and Micro controller along with the Power supply unit.

Building Blocks •Microcontroller P89C51 •Stepper Motors •20 X 4 Dot Matrix LCD Unit •Bluetooth Communication Set •Sensors:IR Sensor

Temperature Sensor

Metal Sensor

GAS Sensor

What is Bluetooth? 

“Bluetooth wireless technology is an open specification for a lowcost, low-power, short-range ) radio technology for wireless communication of voice and data anywhere in the world.”

BLUETOOTH 

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Blue tooth is the international standard of wireless communication. It uses Microwave frequency of about 2.4 GHz. Bluetooth technology is optimized for use in mobiles.

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Blue tooth device can play a role as a master or slave Master tries to connect itself to other devices and slave is waiting to be connected from other devices. A Bluetooth connection can always be made from pair of master and slave devices. A slave can be in two modes, Inquiry scan or Page scan mode.

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Inquiry scan mode is waiting for packet of Inquiry from other Blue tooth device and Page scan mode waiting for the packet of connection from other Bluetooth device. Every Bluetooth device has its unique address, called BD (Bluetooth Device) address, which is composed of twelve hexadecimal digits which is used frequently while establishing the link among the Bluetooth devices.

BT MASTER

BT SLAVE

Blue Tooth Communication Set 

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Low range wireless communication Serial Interface with programmable IC’s A pair of BT Devices are used for Communication ASCII data transmission is used for convenience

Power Supply 

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The power supply unit is used to provide a constant 5V DC supply to different IC’s. This is a standard circuit using external 12V DC adapter and fixed 3-pin voltage regulator. Diode is added in series to avoid Reverse voltage .

Micro controller 

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The 89C51 is a low cost Micro controller from either ATMEL or PHILIPS. It has a 40pin configuration and other components are interfaced to its ports. The Micro controller takes input from the external sources and routes them to the appropriate devices as programmed in it. Hence it is the main thing controlling the direction of the robot.

Micro controller P89C51 

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Extended Functionalities of 8051 64KB of Code Memory 768 Bytes of Extended RAM Additional Timer/Counter In System Programmability

Features •It is a 40 pin IC •It has on-chip ROM in the form of flash memory 10kb. •32 programmable i/o lines •6 interrupt sources. •Allows In system programming (ISP).Hence no need to use PROM programmer •Operating temperature is -55 to +125 0 C

Stepper motor 

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Stepper motors fill a unique niche in the motor control world. These motors are commonly used in measurement and control applications. A 10V, 1.5Amps variable reluctance unipolar stepper motor is used. Here stepper motor converts electronic pulses into Mechanical energy to drive the system.

Unipolar Stepper Motor 

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Four Control Pins for a motor All 8 Pins of Port 2 of µC are connected to both the motors A Pair of Current Driver IC’s is used to provide appropriate Current to the windings.

Stepper Motor-Control Circuit

20x4 LCD display •Upgraded version of 16 X 2 LCD Unit •Parallel Connection to the Port 0 of µC •Receives ASCII value and displays the Character •Easy to Initialize and Clear the Display

20 X 4 LCD Display Unit

IR sensor 

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Traces out any obstacles in its path The signal strength of the IR sensor gives the presence of any obstacle to the robot

+5V

Astable Multivibrator

IR SENSOR

Vcc

8

4

IR LED

7

6

5 5 5

3

2

No Obstacle Data o/p

8 9 c 5 1

Ext Int0

Microcontroller

Vcc

+5V

GND

IR Receiver TSOP1738

+5V Vcc=5V

8

4

7

6

38KHz

555

3

2

Obstacle Found Obstacle Data o/p

8 9 c 5 1

Ext Int0

Microcontroller

Vcc

+5V

GND

IR Receiver TSOP1738

Metal Detector 

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Metal detector detects the metals present under the ground. It sends the information to the master device (system) through blue tooth technology

Metal Detector

Metal Detector

Metal

Smoke/Gas Sensor 

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There are two types of smoke sensors in common use. The ionization or radioactive type or photoelectric type. Here we are using ionization smoke sensor. The smoke detector, which is placed on the robot, detects the smoke and sends the information to master BT.

Gas Sensor

Gas Sensor Rs

5V

VComp

VRef = 0.8V

VComp

VComp=5V

VOut= 1.2V

Vout=90mV 0V Rs, air = 7.1MΩ

Rs, gas = 0.71MΩ

Rs, air = 7.1MΩ

Temperature Sensor – DS 1631 

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Data Transfer is only two wired interface with µC. SDA – P3.6; SCL – P3.7 Wide range of Temperature conversion with 12 bit Resolution. The Operative Conditions can be Decided by Accessing TH and TL Registers.

Robot Control Using Bluetooth Technology

Bluetooth Device

Bluetooth

Antenna

PC Bluetooth POWER SUPPLY IR SENSOR

Stepper Motor Left/Right Rev/Fwd

Antenna Atmel Micro Controller 89C51

DRIVER

METAL DETECTOR

Bluetooth Device

APPLICATIONS

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This Robot finds its application in the Defense applications like Land mine cleaning Security system Outdoor security application For bomb disposal.

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In the areas like Disaster management.

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REFERENCES  

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www.atmel.com www.semiconductors.philips.com www.howstuffworks.com www.findarticles.com www.iec.org

•The 8051 Micro controller Architecture, Programming & Applications by Kenneth J.Ayala. •8051 Micro controller and Embedded systems using assembly & C by Muhammad Ali Mazidi.

•Blue tooth – Connect without cables by Jennifer Bray and Charles F Sturman

THANK YOU