Imballaggio di sicurezza

Abbiamo tutto il prodotto comprato che l'impiegato di verifica ha dovuto passare sopra un rilievo elettronico speciale prima che abbiano disposto l'articolo nel sacchetto.

Perchè l'impiegato ha dovuto fare quello?

Le probabilità sono, stavano disattivando un dispositivo elettronico fissato a, o nascosto dentro, il prodotto che avete comprato.

Etichettare di fonte è il processo di aggiunta del dispositivo elettronico piccolo ad un prodotto per trattenere il restringimento (furto). Il dispositivo si regola fuori di un allarme del deposito se non è disattivato ai tempi della verifica.

Tutto ma ai ladri potenziali, etichettare di fonte genera vinc-vinc-vince la situazione: i dispositivi permettono che i rivenditori mettano a fuoco sui clienti onesti invece di preoccuparsi per gli shoplifters; i fornitori del prodotto stanno fornendi più spazio della mensola per gli articoli che normalmente sono considerati alto shrink; ed i clienti possono maneggiare il prodotto che è stivato normalmente da vista. I benefici finora superano tutte le negazioni in peso che gli esperti di industria invitare sempre più il prodotto per contenere questi dispositivi.

Ma chi applicherà questi dispositivi? La maggior parte dei rivenditori desiderano le modifiche essere applicati durante il manufacturing o il processo impaccante anziché al livello al minuto. Non solo elimina la possibilità di impiegato che altera ma inoltre rende il processo di immagazzinamento delle mensole più efficiente.

Iniettore impaccante di RFID

Nei termini più semplici un sistema d'imballaggio di RFID consiste di una modifica (risponditore) e di un lettore (interrogatore).

La tecnologia degli affari di imballaggio di RFID con la raccolta di informazioni a distanza memorizzata su una modifica usando le comunicazioni di radiofrequenza. Le informazioni memorizzate sulla modifica possono variare dal poco come numero di identificazione, ai kilo-bytes dei dati redatti a e colti dalla modifica, alle informazioni dinamiche effettuate sulla modifica, quali i dati storici di temperatura. The information from the tag/reader combination is either presented to a human operator typically using a hand-held device with a alpha-numeric display or a host computer which automatically manages the information.

Frequency

Critical performance variables in an RFID packaging system involve the range at which communication can be maintained, the size of the information space contained on the tag, the rate at which the communication with the tag can take place, the physical size of the tag, the ability of the system to “simultaneously” communication with multiple tags, and the robustness of the communication with respect to interference due to material in the path between the reader and the tag. Several factors determine the level of performance that can be achieved in these variable. The factors include the legal/regulatory emission levels allowed in the country of use, whether or not a battery is included in the tag to assist its communication back to the reader, and the frequency of the RF carrier used to transport the information between the tag and the reader.

Over the course of decades of RFID package development, industry has evolved RFID packaging solutions that variously trade the regulatory constraints, the signal propagation characteristics of various RF carrier frequencies, and the economics of tag size and optional batteries. These solutions employ only a few RF frequencies around which the vast majority of RFID systems are fielded today. The RF frequencies include relatively narrow bands centered at: 125/134KHz or low frequency (LF) 13.56MHz or high frequency (HF) 433/869/915MHz or ultra-high frequency (UHF) 2.45/5.8GHz or micro-wave (uW).

These frequency values are commonly referred to the RFID packaging technology. Thus, tags and readers combinations are described as employing LF, HF, UHF, or uW technology.

Passive/Active Tags

Within any one technology there is a wide variety in tag performance reflecting semiconductor chip performance, tag antenna size and efficiency, and whether a battery is included in the tag. There are two broad classes of tags with respect to the source of energy used to power the tags: passive tags or those that receive their energy solely from the RF field supplied by the reader, or active tags that have a battery to boost the read range of the tag.

Read Range

In many cases there is a sharp delineation between the read range of two classes of tags employing passive technology, those that have a relatively short read range and those that have a relatively long read range, especially at LF and HE Like many radio systems, short range RFID systems tend to be less expensive and relatively easy to design and build. Long range RFID packaging systems tend to be more expensive and difficult to build. Typically, the range performance of RFID packagin systems is determined to a major extent by the reader, the power of the signal it radiates and the sensitivity of its receiver.

Anti-Collision

In many applications it is desirable to communicate with a tag when other similar tags are simultaneously visible to the reader. In the case of tagging pigs, it is unlikely two pigs will need to be in the read space at the same time. In the case of library books an important design feature is the ability to read and “check-out” multiple books as the same time. The ability of the tag/reader system to talk unambiguously with one tag at a time is determined by the anti-collision algorithm used to identify each tag and establish a communication session with the tag.

Tag/Reader Communication Protocols

How information is communicated to and from the tag has historically been determined by the original designer of the semiconductor device in the tag. These protocols vary widely in the ways the carrier is modulated, the data is encoded, read, write, verify commands are structured, how multiple tags are read without interfering with one another, and whether privacy or?security services are provided. These varying protocols have relative advantages and disadvantages, depending upon the application being considered.

Standards

Over time RFID manufacturers and users have typically concluded that while there are advantages to having several communication protocols from which to choose for any application, there would at each frequency be an advantage to settling on one protocol, or at most a couple of protocols, which multiple suppliers could offer chips and readers.

The appearance of these standards is relatively recent and reflects the work of industry bodies including the UCC and the EAN, the International Standard Organization ISO, and national bodies like ANSI in the U.S. Many of these standards are new or are in the process of being defined and there is considerable uncertainty what their form will ultimately be.

Summary

The RFID industry today represents a dynamic attempt by manufacturers and users to build and deploy solutions reflecting trade-offs between a wide range of technical, political, and regulatory constraints. It is in this dynamic environment that SAMSys provides RFID readers which enable end-users, system integrators, and automatic data capture (ADC) equipment suppliers to make timely and safe decisions about how to employ RFID.

For more information on the RFID packaging, please contact:

Bar Code Specialties
12272 Monarch Street
Garden Grove, CA 92841
1-844-411-CODE