RFID BASED

GUARD PATROLLING SYSTEM

APARNA B (4GW06EC005)BHAVANA SHEKAR (4GW06EC007)LAKSHMI M.N (4GW06EC021)SMITHA J.V (4GW06EC049)

INTRODUCTION

• Radio Frequency IDentification (RFID) is a generic term that is used to describe a system that transmits the identity of an object or person wirelessly, using radio waves

• RFID is grouped under the category of automatic identification technologies.

• RFID is designed to enable readers to capture data on tags and transmit it to a computer system, without needing a person to be involved.

• A typical RFID Tag consists of a microchip attached to a radio antenna mounted on a substrate.

• The chip stores information about a product or shipment like date of manufacture, destination and sell-by date.

• To retrieve the data stored on an RFID tag, a reader is required.

• A typical reader is a device that has one or more antennas that emit radio waves and receive signals back from the tag.

• The reader then passes the information in digital form to a computer system.

OBJECTIVE

• In 21st century, there is a rising need for automatic identification and data collection (AIDC) technology

• RFID is one such automated technology which provides a link to data without the need to make contact with the item, without line of sight or in harsh or dirty environments that may limit other AIDC technologies.

OBJECTIVE

• The main goal of an RFID system is to retrieve the data through a wireless connection

• RFID based guard patrolling system contains handheld RFID reader which can be easily carried by guards in security systems.

METHODOLOGY• RFID tag made up of EPROM and an antenna, is

given to each employee of an organization. It consists of employee’s name, identification number and designation.

• Whenever employees enter or exit the organization, tag is read by the reader and the information is gathered.

• A database is used to store the information gained through interrogating the tag.

BLOCK DIAGRAM

Battery

Personal Computer

Microcontroller

RF Circuit

LCD

Keypad

230v 50 Hz

RS 232/485

9v

BLOCK DIAGRAM

• The RFID driver IC continuously transmits RF signals through antenna which creates electro-magnetic field.

• Whenever the RFID tag is brought in the vicinity of this field, the tag gets triggered and hence the data on the tag is read .

• This data is sent to the microcontroller through the data lines from the driver IC which can be later accessed by the user.

• A database of all the valid tag holders is maintained in a PC.

• RFID reader communicates with the PC through an RS232 interface.

• The data from the microcontroller is displayed on an alphanumeric display on an user request. .

• The data can also be accessed and modified when needed by an user using a keypad. The keypad used is a capacitor sensor keypad.

• The communication between the microcontroller and the keypad is achieved through the IIC protocol.

RFID TAG READER

HARDWARE COMPONENTS

• Battery

• NXP89C51RD2 Microcontroller

• Alphanumeric LCD

• Keypad

• RFIC MFRC500

• RS232

• PC

SOFTWARE TOOLS• The software tool used for schematic of

each hardware block in the diagram is OrCAD version 9.0

• The language used for coding is embedded C.

• The software tool used for writing the code is Kiel microvision.