Intelligent Campus Using Rfid

Topics: RFID, Processor register, X86 Pages: 30 (7498 words) Published: April 19, 2010
chapter 1

With the increasing denial of time and space the RFID technology is gaining momentum day by day. RFID is a source of identification of individuals and unique products. The budding technology RFID proves to threaten even the cloning technique, through the chip insertion. New ways of improving the existing RFID technology are being found and implemented. This advancement of RFID technology is looked beyond the security purposes.

Radio frequency identification (RFID) is a general term that is used to describe a system that transmits the identity (in the form of unique serial number) of an object wirelessly, using radio waves. RFID technologies are grouped under the more generic Automatic Identification and Data Capture (AIDC). The RFID technology is used only in security, tagging goods, inventory purposes. Since the RFID technology is not well established in India, the introduction of new methodology in the field of RFID will indeed enhance the use of RFID technology in various areas of science and technology.

An individual should be allocated to maintain registers in all places and appointment of staffs for coordinating with students in all occasions. The ID card can be duplicated even thought it has some other advancement which will be used in rare occasions.

The best solution to the above problem is to develop a single RFID tag that can be used inside the college campus. Each and every RFID tag holds a particular number and it is integrated with the id cards of each and every individuals. The RFID tag reader can be fixed anywhere in campus and it is used to collect the information about the tag location. The collected data can be sent to centralized server to handle that information. Another added advantage is that the ID cards can’t be duplicated. This has several advantages and it is a time saving one for the institution, students and staff members.


The hardware required is:
1) Personal computer.
2) RS 232.
3) Reader.
4) Power supply unit.
5) IR transmitter and receiver pair.
6) Buzzer.
7) LCD.
8) Tags.

The software required is:
1) AVR studio 3.5.
2) Visual studio 6.0.


Figure 1.1 block diagram of intelligent campus using RFID

RFID system

Radio Frequency Identification or RFID refers to the set of technologies that use radio waves for identifying objects or people. The RFID system is used to identify individual objects or things in the environment which can be monitored through use of wireless technology. RFID is a generic term for technologies that use radio waves to remotely store and retrieve data. In other words, it is a combined term with RF and ID where RF means a wireless communication technology and ID means identification information of tag. So it is said that RFID is theoretically a wireless networking technology to transmit identification information stored at an electronic memory space.

▪ An RFID device (transponder or tag), that contains data about an item. ▪ An antenna used to transmit the RF signals between the reader and the RFID devices. ▪ An RF transceiver that generates the RF signals.

▪ A reader that receives RF transmissions from an RFID device and passes the data to the host system for processing.

Figure 2.1: RFID SYSTEM


The tag contains circuit to both rectify DC power from the incoming RF signal as well as to detect and extract the information modulated on the signal. The antenna load is a controlled resistance that changes the impedance of the dipole, enabling the backscatter. The tag IC is mounted on a carrier known as a strap and subsequently bonded to the antenna to form the fully assembled tag. The chip itself is very small, enabled by modem CMOS...
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