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sudheesh1

TOPIC:MINI PROJECTHUMAN DETECTION ROBOELECTRONICS AND COMMUNICATIONS6PROJECT GROUP- 1MEMBERSSUDEESH VSVINEETH A VDHANYA XAVIERASHMI T ISSACSIBIN SEBASTIAN

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INTRODUCTION

The novel idea of this project is to locate the human presence using the robot which is controlled through RF ZIGBEE communication.

This project can find its application in military and security where without our presence we can get to know the status of the other side.

This project can also be used to navigate around the disaster areas and try to find humans who need help. 4/29/20153

BLOCK DIAGRAM

ROBO SECTION 4/29/20154

REMOTE SECTION

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CIRCUIT DIAGRAMS

ROBOT SECTION 4/29/20156

REMOTE SECTION

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COMPONENT STUDY

PIC 16F877A

ZIGBEE

LM35 TEMPERATURE SENSORS LPG SENSOR MQ6 PIR SENSOR

OBSTACLE SENSORL293D MOTOR DRIVER

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PIC 16F877APIC is a family of Harvard architecture

RISC microcontroller.

Why PIC16F877A is very popular?

What is the advantages of PIC16F877A?

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PIN DIAGRAM OF PIC16F877

PLASTIC DUAL IN-LINE PACKAGE (DIP)4/29/201510

As you can see the PIC16F877A is rich in peripherals so you can use it for many different projects.

Bubble diagram of PIC16F8774/29/201511

ZIGBEEThere are many wireless monitoring and control applications in industrial and home environments which require longer battery life, lower data rates and less complexity than those from existing standards.

A new standard called IEEE 802.15.4 has been developed by IEEE. The new standard is also called Zig Bee

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This allows ZigBee networks to be formedad-hoc, with no centralized control or high-power transmitter/receiver able to reach all of the devices.

Any ZigBee device can be tasked with running the network4/29/201513

LM35 TEMPERATURE SENSORS

The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature.

Calibrated directly in Celsius (Centigrade)Linear + 10.0 mV/C scale factor0.5C accuracy guaranteeable (at +25C)Operates from 4 to 30 voltsLess than 60 A current drainLow self-heating, 0.08C in still airRated for full -55 to +150C range

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LPG SENSOR MQ6

They are used in gas leakage detecting equipments in family and industry.

This sensor suitable for detecting of LPG, iso-butane, propane, LNG

High sensitivity to LPG, iso-butane, propane Small sensitivity to alcohol, smoke. Fast response . Stable and long life Simple drive circuit 4/29/201515

PIR SENSOR

Apassive infrared sensor(PIR sensor) is an electronicsensorthat measuresinfrared(IR) light radiating from objects in its field of view.

The termpassivein this instance refers to the fact that PIR devices do not generate or radiate any energy for detection purposes

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OBSTACLE SENSOR

This sensor is a short range obstacle detector with no dead zone.

It has a reasonably narrow detection area

Range can also be increased by increasing the power to the IR LEDs or adding more IR LEDs

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L293D MOTOR DRIVER

The L293D are quadruple high-current H bridge drivers.

The L293D is designed to provide bidirectional drive currents of up to 600-mA at voltages from 4.5 V to 36

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293D LOGIC TABLE.

Pin 2=Logic 1andPin 7=Logic 0| Clockwise Pin 2=Logic 0andPin 7=Logic 1| Anticlockwise Pin 2=Logic 0andPin 7=Logic 0| Idle [No rotation]

Pin 2=Logic 1andPin 7=Logic 1| Idle [No rotation]In a very similar way the motor can also operated across input pin 15,10 for motor on the right hand side.

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HELICAL GEAR MOTOR:

A unit which creates mechanical energy from electrical energy and which transmits mechanical energy through the gearbox at a reduced speed.

A gearhead and motor combination to reduce the speed of the motor to obtain the desired speed or torque.

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LCD DISPLAYLCD (Liquid Crystal Display) screen is an electronic display module and find a wide range of applications.

A 16x2 LCD display is very basic module and is very commonly used in various devices and circuits.

A 16x2 LCD means it can display 16 characters per line and there are 2 such lines.

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SYSTEM WORKING

From the transmitter end we are controlling the robotic action which will be sent to the remote end via zigbee. If any obstacle is detected, the LCD at the transmitter end will receive information about it. and try to avoid the obstacles automatically.Now in between the movements of the robot, if any human activities are observed by the human tracking sensor then it will transmit alert to the controller And stop the robot and produce alarm.

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ALGORITHM OF PROGRAM Step 1: StartStep 2: Initialize micro controllerStep 3: Initialize motorsStep 4: Initialize PIR sensorStep 5: receive commands form remote Monitor PIR sensor ,gas sensor ,obstacle sensorStep 6: If obstacle detected motor rotates in specified direction send obstacle info to remote If human detected motor stops and buzzer on send human info to remote Step 7: read the temperature and gas status send info to remote go to step 5Step 8: Stop

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Step 1: StartStep 2: Initialize micro controllerStep 3: Initialize lcdStep 4: Initialize keyStep 5: Monitor key pad Step 6: If key press detected send command to robo for specified key functionStep 7: If command from robo detected ,display info specified by each command function go to step 5Step 8: Stop

4/29/201525REMOTE SECTION

APPLICATIONS Gas leakage detector: A security robot

Home automation: Military applications:

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LIMITATIONS OF THE PROJECT

This project is a microcontroller-based project. The main limitation is the size of ROM available on the chip for programming.

RF Communication cannot be extended for some more distance.

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CONCLUSION

The project HUMAN DETECTION ROBOT has been successfully designed and stimulated .4/29/201528

REFERENCESPIC16F877ADatasheet, http://ww1.microchip.com/downloads/en/device doc/39582b.pdfL293DDatasheet, http://users.ece.utexas.edu/~valvano/Datasheets/ L293d.pdf WWW.EFY.COMWWW.ieee.comwww.google.comPic microcontroller Muhammad ali Mazidi

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THANK YOU

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