rfid and wireless sensor networks
TRANSCRIPT
Presented By:Devika Roy Choudhury (20165009)
Dinesh Gosavi (20165010)
Jui Shah (20165015)
Kartik Kachhadiya (20165018)
Twinkle Mehta (20165042)
RFID (Radio Frequency IDentification) and Wireless sensor network(WSN) are two important wireless technologies that have wide varietyof applications and provide unlimited future potentials
RFID is used to detect presence and location of objects while WSN isused to sense and monitor the environment.
The basic idea of integration of RFID with WSN is to connect the RFIDreader to an RF transceiver, which has routing function and canforward information to and from other readers. Users are able to readtags from distance 100-200m that is well beyond normal range ofreaders.
Radio-frequency identification (RFID) uses electro-
magnetic fields to automatically identify and track tags
attached to objects.
The tags contain electronically stored information.
Passive tags collect energy from a nearby RFID reader’s interrogating radiowaves.
Active tags have a local power source such as a battery and may operate athundreds of meters from the RFID reader.
RFID tags are used in many industries, for example, an RFID tag attached toan automobile during production can be used to track its progress throughthe assembly line; RFID-tagged pharmaceuticals can be tracked throughwarehouses; and implanting RFID microchips in livestock and pets allowspositive identification of animals.
A RFID system is made up of two parts: a tag or label and areader. RFID tags or labels are embedded with a transmitterand a receiver. The RFID component on the tags have twoparts: a microchip that stores and processes information, andan antenna to receive and transmit a signal. The tag containsthe specific serial number for one specific object.
RFID Barcode
Read RateMultiple (>100) tags can be readsimultaneously.
Tags can only be read manually, one at atime.
Line of SightItems can be oriented in any direction,as long as it is in the read range, anddirect line of sight is never required.
Scanner must physically see each itemdirectly to scan, and items must beoriented in a very specific manner.
Human CapitalVirtually none. Once up and running,the system is completely automated.
Large requirements. Labourers must scaneach tag.
Read/Write Capability
More than just reading. Ability to read,write, modify, and update.
Read only. Ability to read items andnothing else.
DurabilityHigh. Much better protected, and caneven be internally attached, so it can beread in very harsh environments.
Low. Easily damaged or removed; cannotbe read if dirty or greasy.
Security
High. Difficult to replicate. Data can beencrypted, password protected, orinclude a “kill” feature to remove datapermanently, so information stored ismuch more secure.
Low. Much easier to reproduce orcounterfeit.
The consumers are looking for the systems that are cheap, consumeless power, and having high level of security and safety features.
The use of semi-passive or active RFID technology in combinationwith WSN has a promising future since reading range becomes muchlarger.
RFID and WSN technology are the measures for the future ofUbiquitous Computing. The field is still in its infancy and along withthe demand of the applications, we are definitely to see the allroundimprovement in the sensing, transmission and detection, networking,control theory, software, and middleware.
