public transport system using rfid_ppt - copy

8/7/2019 Public transport system using rfid_ppt - Copy

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By,

Sapna bhor

Sayali rathi

Anurag parvekar


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Exsting fare system:

y Sometimes charge system is unreasonable.

y Everytime passenger has to prepare changes.

y So passenger can easily cheat the conductory Fare is not according to petrol or diesel prize.

y Fare has to be in round figure

y Passeger has to pay extra ,without travel.


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Fare using rfidy Fare is based on distance travelled i.e on more fine

level

y Like exactly Re.1 for 1 km, throughout the journey.y Fare is adjustable for every journey according to petrol

price.

y Fare can be non round figure i.e Rs4.55 etc


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Contd

y The system is cashless i.e uses virtual money.

y It saves paper.y Both passenger and service provider are beneficial.

y The system can be made coductor less


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Basic ideay Each user has to carry rfid rechargable card.

y Simply "beep" their cards on the fare-processing device

at the entry.y Computational device start computation for the

detected card.

y At exit user has to again beep his card.

y T

he fare for this much distance will be deducted fromcard.

y The balance will be updated on card at the exit.

y The card can be recharged at cbs .


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Main component of system:

y Rfid tag

y Rfid reader

y Encodery Microcontroller

y Eeprom memory

y Lcd

y Pc interface


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Rfid tagVariations:

y Memoryy Size (16 bits - 512 kBytes +)y Read-Only, Read/Write or WORMy Type: EEProm, Antifuse, FeRam

y Arbitration (Anti-collision)y Ability to read/write one or

many tags at a time

y Frequencyy 125KHz - 5.8 GHz

y Physical Dimensionsy Thumbnail to Brick sizes

y Price ($0.50 to $250)


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Rfid reader:-y Also known an interrogator

y Reader powers passive tags

with RF energyy Can be handheld or stationary

y Consists of:

Transceiver

Antenna

Microprocessor

Network interface


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Rfid frequency range:-Frequency Regulation Range Data Speed Comments

125-150 kHz Basically unregulated 10 cm LowAnimal identificationand factory datacollection systems

13.56 MHzISM band, differingpower levels and dutycycle

< 1mLow tomoderate

Popular frequency forI.C. Cards (SmartCards)

433 MHzNon-specific ShortRange Devices (SRD),Location Systems

1 100 m ModerateAsset tracking for U.S.DoD (Pallets)

860-930 MHz

ISM band (Region 2);increasing use inother regions,differing power levelsand duty cycle

2 5 mModerate tohigh

EAN.UCC GTAG,MH10.8.4 (RTI),AIAG B-11 (Tires)

2450 MHzISM band, differingpower levels and dutycycle

1 2 m HighIEEE 802.11b,Bluetooth, CT,AIAG B-11


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Microcontroller:-y It has input signal from rfid reader ,encoder.

y Eeprom ,max232,lcd are interfaced to controller.

y Further uc also computes distance and farea for eachdetected card.

y Here we used 89c52 controller.

y Four switches are interfaced to uc for differentoperation:-

-read tag

-write to tag


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Lcd :-y Liquid crystal display is interfaced to uc.

y It used to display different msgs like

-card is valid-card is read

-write mode

y 16x2 lcd is used.


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Eprom memory:-y Eprom is reprogrammable memory

y Its used to store fare rates for a travel.

y Rate can be changed using pc via max232.y Here at24c08 fprom is used.


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System overview:-y Encoder will send the distance reading.

y Rfid reader detects the tag.

y

Uc checks the balance of the card.y If card dont have sufficient balance . buzzer will be

on.

y Then uc start computation for detected tag

y

At the destination station user has to press writeswitch.

y So, appropriate amount will be deducted from tag,rest balance will be stored on tag.

public transport system using rfid_ppt - copy

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