19-06-2012, 05:52 PM
RFID ACCESS CONTROL SYSTEM AND SECURITY WEBCAM WITH VOICE ACKNOWLEDGEMENT
RFID ACCESS CONTROL SYSTEM AND SECURITY WEBCAM.doc (Size: 65.5 KB / Downloads: 49)
Abstract:
The main aim of this project is power security for companies or Lab. In this project we are using RFID.
In order to organize or control different access systems by person or items, this application should provide accurate security. So RFID is used to provide security by embedding access control in ID cards. These cards are used monitoring attendance and also prevent authorizing access.
Working:
Controller will check whether the tag identification number provided by the RFID reader have the access permission or not. If have, access permission will be provided to that particular person, i.e. door control signal enabled. Otherwise an alert message will be sent to a predetermined mobile number and alarm will be activated. Each person’s entry timing and access permissions can be seen on the LCD.
Real Time Clock (RTC – DS1307)
This is used to maintain the current time in off line processing. The DS1307 Serial Real-Time Clock is a low power; full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially via a 2-wire, bi-directional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1307 has a built-in power sense circuit that detects power failures and automatically switches to the battery supply.
RFID:
Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders.
An RFID tag is an object that can be applied to or incorporated into a product, animal, or person for the purpose of identification using radiowaves.
RFID tags contain mainly two parts. One is an integrated circuit for storing and processing information, modulating and demodulating a (RF) signal and can also be used for other specialized functions. The second is an antenna for receiving and transmitting the signal.
An RFID reader typically contains a module (transmitter and receiver), a control unit and a coupling element (antenna). The reader has three main functions: energizing, demodulating and decoding.
GSM technology can be incorporated to alert an authorized person about an attempt of an unauthorized person to access to the restricted area.
LPC 2129 is used to control the operations like allowing access to authorized person, attendance maintenance, alerting a specific person through GSM, modifying data base and to interface with computer system