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PROXIMITY CARD AND VIDEO CAMERA BASED FOOL PROOF ACESS CONTROL

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									     PROXIMITY CARD AND VIDEO CAMERA BASED FOOL PROOF ACESS CONTROL




INTRODUCTION


This project is based on VTU syllabus. The proposed system is based on ATMEL 89S52
µcontroller which is in our syllabus.
        For doing this project we use some of the software like
         Embedded C for programming the application software to the microcontroller.
         Protel schematic software is used for designing the circuit diagram for this project.
         Express PCB software is used for designing the PCB for this project.
        (Since PCB making is a big process and involves lot of machineries which are expensive,
        we are going to outsource this to the manufacturer.)

ABSTRACT:


This system is mainly used for security purpose in offices and industries. Nowadays in some
companies anybody can enter inside the company in the name of other employee. Because the
company can’t check the person photo at every time. After that person entered inside the
company, if he does any unwanted activities ad the person came outside the company, nobody
can find out that person. We solved this problem in our project by using RF proximity card and
video camera. Whenever the person enters to the campus he has swipe the ID card. That time
the camera will take the snap and the picture will store in computer with their ID. So, in future it’s
very easy to find out the person who is involved in that particular unwanted activity.


COMPONENTS USED:


     Power Supply 5v DC           -      7805
     Micro controller             -      AT89S52Atmel (www.Atmel.Com)
     LCD                          -       (Liquid crystal display) 2 * 16
     Buzzer. Freq                 -      1 to 18 kHz (5v-12Vdc)
     MAX 232                     -       serial communication
     Proximity card.
     Proximity card reader.
     Computer.


SOFTWARES USED:
      Embedded C &VB
WORKING PRINCIPLE:


A small hard device RF card reader [proximity card] with micro controller will be connected to
serial port of the PC and the camera is wired to USB port. A program in VB is written to capture
the image of the person who shows the access card and puts it into the database.


When a person comes to Door and shows RF card, the reader reads the card ID and then sends
to the serial port of the PC. At the serial port the VB software capture this ID and checks with the
database. If the ID present in the database is correct then it accepts the ID and store as one
record with Date and time. Now the PC sends a signal to the camera to click the photo of this
person. After it is clicked the PC stores this image with the ID in the database. Then the PC
sends a signal to the device to open the door.


If for instant some other person shows the card the system compares in the Database and if the
ID is not present, it send the command to the door that don’t give access and display on the LCD
reader “Access Denied”.


BLOCK DIAGRAM:




                                                                                 LCD (Display)
    Computer                      RS232
                                 Converter
                                                                           LCD              LCD
                                                                           Driver           Glass
                                                      Micro
                                                     Controller              Buzzer
                                                    (AT89S52)
                                                                        Buzzer         Buzzer
                                                                        Driver
                  Camera                                                                OSC


                                                                                 Power Supply
                                      Proximity
                     Proximity          Card
                       Card                                               Trans          Regulator
                                       Reader
                                                                         former           (7805)

                                                                        Rectifier        Filter
COMPONENT APPLICATIONS:


POWER SUPPLY:


The microcontroller and other devices get power supply from AC to Dc adapter through voltage
regulator. The adapter output voltage will be 12V DC non regulated. The 7805 voltage regulators
are used to convert 12 V to 5VDC.



                   AC/DC                  Regulator              Filter
      AC Power     Adapter                 (7805)                          DC Output




Vital role of power supply in ‘proximity card and video camera based fool proof access
control’
The adapter output voltage will be 12V DC non regulated. The 7805/7812 voltage regulators are
used to convert 12 V to 5V/12V DC.

MICRO CONTROLLER-AT89S52

The AT89S52 is a widely available in market, cost effective, low power and high-performance
CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device
is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with
the industry- standard 80C51 instruction set and pin out.
Features:
8K Bytes of In-System Programmable (ISP) Flash Memory
Endurance: 1000 Write/Erase Cycles
4.0V to 5.5V Operating Range
256 x 8-bit Internal RAM
32 Programmable I/O Lines
Full Duplex UART Serial Channel
Fully Static Operation: 0 Hz to 33 MHz


Vital role of micro controller-AT89s52 in ‘proximity card and video camera based fool
proof access control’
Whenever the person swipe the card the microcontroller will read the encoded card number from
proximity card reader and it will decode the ID and send to the computer through serial port. After
sending the ID it will receive the acknowledgement from PC and according to the
acknowledgement it will send commands to the buzzer and LCD.
LCD (LIQUID CRYSTAL DISPLAY)


LCDs can add a lot to your application in terms of providing an useful interface for the user,
debugging an application or just giving it a "professional" look. The most common type of LCD
controller is the Hitatchi 44780 which provides a relatively simple interface between a processor
and an LCD. Using this interface is often not attempted by inexperienced designers and
programmers because it is difficult to find good documentation on the interface, initializing the
interface can be a problem and the displays themselves are expensive.
LCD has single line display, Two-line display, four line display. Every line has 16 characters.


Vital role of LCD in ‘proximity card and video camera based fool proof access control’
LCD is used to display if the card is valid or not.


PROXIMITY CARD:
This card contains employee/students ID number. This is communicating with RF reader through
RF signal.


PROXIMITY CARD READER


Pyramid Series readers can be connected to virtually any project that conforms to Wiegand
format standards. All connections between the reader and control panel are made through the
reader's cable.


Vital role of Proximity card reader in ‘proximity card and video camera based fool proof
access control’
This is used to read the employee/students ID number and transmit the ID number to
microcontroller. This is communicating with smart card through RF signal. If the distance between
card and reader is les than 10cm the reader will read the ID of the card from card.


CAMERA:


This is web camera. The size of this camera is small. So we can handle this camera at very easy.
Vital role of camera in ‘proximity card and video camera based fool proof access control’
This is used to capture the person photograph. This is controlled through visual basic application.
BUZZER:


The buzzer subsystem produces a 2 KHz audible tone when powered. The buzzer will sound
when the signal coming into the driver is high. It must be connected to a transistor, Darlington or
transducer driver subsystem.


The buzzer is connected between the supply rail (+V) and the input signal. This acts as load on
the driver. When the input signal coming into the buzzer subsystem is low, a potential difference
across the buzzer causes current to flow. It is this flow of current that causes the buzzer to sound.


Vital role of Buzzer in ‘proximity card and video camera based fool proof access control’
This is used to indicate the process status. After card is swiped the buzzer will give on beep. So
the person can easily identify the process status.


RS 232 CONVERTER (MAX 232N)


This is the device, which is used to convert TTL/RS232 vice versa.
RS-232Protocol:
RS-232 was created for one purpose, to interface between Data Terminal Equipment (DTE) and
Data Communications Equipment (DCE) employing serial binary data interchange. So as stated
the DTE is the terminal or computer and the DCE is the modem or other communications device.
RS-232 pin-outs for IBM compatible computers are shown below. There are two configurations
that are typically used: one for a 9-pin connector and the other for a 25-pin connector.




Voltage range
The standard voltage range on RS-232 pins is _15V to +15V. This voltage range applies to all
RS-232 signal pins. The total voltage swing during signal transmission can be as large as 30V. In
many cases, RS-232 ports will operate with voltages as low as _5V to +5V. This wide range
of voltages allows for better compatibility between different types of equipment and allows greater
noise margin to avoid interference.
Because the voltage swing on RS-232 lines is so large, the RS-232 signal lines generate a
significant amount of electrical noise. It is important that this signal does not run close to high
impedance microphone lines or audio lines in a system. In cases where you must run these
types of signals nearby one another, it is important to make sure that all audio wires are properly
shielded.


The main role of the RS232 chip is to convert the data coming for the 12-volt logic to
5 volt logic and from 5 volt logic to 12 volt logic


Vital role of RS232 Converter (Max 232n) in ‘proximity card and video camera based fool
proof access control’
The main role of the RS232 chip is to convert the data coming for the 12-volt logic to 5 volt logic
and from 5 volt logic to 12 volt logic


COMPUTER:


This is used to monitor the system status and controls the system devices. Here the front end
application is developed by using VB software. The computer is communicating with
microcontroller through serial port.


Vital role of computer in ‘proximity card and video camera based fool proof access
control’
The PC is used to store the person photograph and ID and time of photograph taken in visual
basic database. Here the front end software is developed by using visual basic software. The pc
is communicating with microcontroller through serial port.


APPLICATIONS OF THIS PROJECT:
       Organizations
       Offices

								
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