radio-frequency identification

(redirected from Contactless identification)

radio-frequency identification

(RFID), a technology that uses radio waves to transmit data and uniquely identify an animal, person, or thing. An RFID system typically consists of a tag and a reader. The tag, or transponder, contains information identifying an item or specifying a condition or state; the information is stored on a microchip that is attached to an antenna. The reader communicates with the tag and reads the information into its memory. The tag typically contains a unique serial number for identification, and may have other data, such as a customers' account number or a dog's registration information. Some tags can also receive new data, for example, an item's location during shipment for tracking purposes.

An RFID system is broadly similar to barcodebarcode,
computer coding system that uses a printed pattern of lines and bars to identify such things as products, mail and packages, and customer accounts; the term also is used for similar coding systems that do not use bar-based patterns.
..... Click the link for more information.
 systems, where information is transferred optically, but RFID has several advantages with respect to barcode technology: the capacity to store large amounts of data, the ability to read many tags simultaneously, and the ability to gather data without direct contact or line-of-sight scanning. RFID tags can be active, passive, or semipassive. Active tags employ batteries as a complete or partial power source. This increases the effective operating range of the tag and permits it to offer additional features, such as temperature sensing. Passive tags are the most common. Such tags remain dormant until triggered by radio energy emitted by the reader; that energy field then provides the power for the tag to operate. Semipassive tags, sometimes called battery-assisted tags, have a battery which powers the tag's microchip's circuitry but does not broadcast a signal to the reader. Some semipassive tags conserve power by laying dormant until they receive a signal from the reader.

Although RFID technology can be traced to the early 1920s, the first practical application was the IFF (Identification Friend or Foe) system pioneered by the British during World War II; transponders were placed into fighter planes and tanks, and readers could query them to determine whether to attack. The system was subsequently adapted for commercial and civil aviation as part of air traffic control systems. A theft-prevention system based on a tag that could store one bit (that could stand for on or off) was developed in the 1970s.

The 1970s saw RFIDs used for toll collection, and the next decade brought expanded use in supply chain management. Technological advances since then have reduced the cost and size of RFID tags, opening up a wider range of uses. RFID technology is already well established in such as livestock tracking and electronic payments, and RFID tags also are used to monitor such physical characteristics as temperature, pressure, and humidity to maintain freshness of agricultural products during shipping and storage. Paper-thin tags can now be embedded in sheets of paper, making them nearly invisible, and concerns have been raised that the technology could be used in covert monitoring schemes that pose a threat to privacy.

RFID is sometimes called dedicated short-range communication (DSRC). Historically the terms RFID and DSRC have been used synonymously to describe a technology based on tags and readers. More recently, however, DSRC has been used to describe the segment of the portion of the radio spectrum allocated to RFID applications.

References in periodicals archive ?
Identivs RFID Inlays will provide contactless identification of the devices, optimizing processes during medical procedures (i.e., checking for compatibility between different types of equipment) and protecting patients health and safety from counterfeiting.
Founded at Harvard University, Nucleus Vision is an IoT-based, contactless identification system that empowers retailers to identify and better serve their customers.
The automatic, contactless identification of cars, lorries or motorbikes using electromagnetic waves is a pioneering technology for the road traffic of the future.
Near field communication is a short-range, high-frequency wireless communications technology that has emerged from the convergence of contactless identification such as radio-frequency identification (RFID) and networking technologies such as Bluetooth and Wi-Fi.
Muhlbauer solutions are capable of serving all current and future needs in the areas of contactless identification of people and goods.
Near Field Communication (NFC) is a short-range wireless connectivity technology that evolved from a combination of existing contactless identification and interconnection technologies.
NFC is jointly developed by Philips and Sony, NFC is a combination of contactless identification and interconnection technologies that enables secure short-range communication between electronic devices, such as mobile phones, PDAs, computers and payments terminals via a fast and easy wireless connection.
With the Nokia NFC shell on their phone, consumers would be able to easily access a variety of services and conveniently exchange information with a simple touch gesture utilizing NFC technology, which combines contactless identification (RFID Radio Frequency Identification) and interconnection technologies, according to Nokia.
The Group's product line includes mechanical, mechatronic, and electronic access and masterkey systems, keys and key coding systems, security and automatic doors, data entry terminals and interface solutions for enterprise data collection, and Legic, the versatile contactless identification medium.
part of a public contract is the provision of unique research and development infrastructure applicable in the fields of contactless identification and aviation information technologies attaching to research and development in question intention.
Muhlbauer solutions are capable of serving all current and futurized needs in the areas of contactless identification of people and goods, e.g., logistics, pharmaceutical products, retail management or public transport.