A passive tag is an tag that does not contain a battery; the power is supplied by the reader. When radio waves from the reader are encountered by a passive rfid tag, the coiled antenna within the tag forms a magnetic field. The tag draws power from it, energizing the circuits in the tag. The tag then sends the information encoded in the tag's memory. This function is normally called “backscattering” as the tags only scatters back part of the energy that it received from the reader.
The major disadvantages of a passive rfid tag are:
- The tag can be read only at very short distances, typically a few feet at most. This greatly limits the device for certain applications.
- It may not be possible to include sensors that can use electricity for power.
- The tag remains readable for a very long time, even after the product to which the tag is attached has been sold and is no longer being tracked.
The advantages of a passive tag are:
- The tag functions without a battery; these tags have a useful life of twenty years or more.
- The tag is typically much less expensive to manufacture
- The tag is much smaller (some tags are the size of a grain of rice). These tags have almost unlimited applications in consumer goods and other areas.
RFID stands for Radio-Frequency Identification. RFID tags, or transponders, are tags that contain microelectronics. These tags can be placed or incorporated in all types of items, such as products, inventory, animals or people. Depending on the technology used, the tags signal can be read from several meters away up to hundreds of meters beyond the line of sight of the reader.
Most RFID tags contain at least two parts. One is an integrated circuit for storing and processing information, modulating and demodulating a (RF) signal, and other specialized functions. The second is an antenna for receiving and transmitting the signal.
RFID solutions use modern wireless technologies to track almost anything. These systems are primarily used by businesses to track and monitor inventory and equipment.
An RFID system is composed of RFID tags or transponders, RFID readers, a standard computer . The RFID tags are attached or inserted on the item and contain micro electronic circuits that store information about the item. The tags transmit this information to remote RFID readers.
A fully automated data capture and analysis system is the most efficient and reliable way to track valuable assets, equipment or critical personnel. RFID technologies overcome difficult logistical challenges, particularly in applications where optically based systems fail and when read/write capabilities are required. The technology is stable, and evolving, with open architectures becoming increasingly available.
Barcode technology is based on optical "viewing" of labels by lasers. The required line-of-sight between label and reader is often difficult, impractical, or even impossible to achieve in certain environments. In order to function properly, a barcode reader must have clean, clear optics, the label must be free of abrasion, and the reader and label must be properly oriented. RFID tags can be read from a greater distance, and are not subject the line of sight obstacle, and work in adverse or difficult environments.
In addition, information on a barcode is fixed and cannot be changed. RFID tags, on the other hand, have electronic memory, similar to computer memory. This information can be dynamically updated.
- No line of sight requirement
- The tag can withstand harsh environments
- Long read range
- Portable database
- Multiple tag read/write
- Tracking people, items, and equipment in real-time
An RFID system enables you to track, protect and locate assets or people in real-time. RFID tags can include various sensors, such as movement, verticality, temperature, humidity) which offers flexibility and specific solutions to focused challenges of certain applications.
RFID-based systems can generate automatic rule-based alerts and raise alarms upon detecting deviations - such as when equipment or personnel are missing, located in unauthorized areas or in violation of any other rule that requires follow-up action. The Vizbee Active RFID Platform offers a single, integrated platform for all of these, as well as legacy IT systems.
Each RFID technology has specific advantages relative to a specific application's requirements and constraints. The Vizbee platform supports all of the market's leading RFID technologies, and can use different technologies within the same project. With the Vizbee platform you can select the best-suited RFID technology for each project.
Active RFID tags have their own internal power source, used to power the integrated circuits and to broadcast the response signal to the reader. Communications from active tags to readers is typically much more reliable due to the ability for active tags to conduct a "session" with a reader. Many active tags today have operational ranges of hundreds of meters, and a battery life of up to 10 years. Active tags may include larger memories than passive tags, and may include the ability to store additional information received from the reader.
Passive RFID tags have no internal power supply. The minute electrical current induced in the antenna by the incoming radio frequency signal provides just enough power for the CMOS integrated circuit in the tag to power up and transmit a response. Most passive tags signal by backscattering the carrier wave from the reader. This means that the antenna has to be designed both to collect power from the incoming signal and also to transmit the outbound backscatter signal. The lack of an onboard power supply means that the device can be quite small: commercially available products exist that can be embedded in a sticker, or under the skin in the case of low frequency RFID tags.
Semi-passive tags, also called semi-active tags, are similar to active tags in that they have their own power source, but the battery only powers the microchip and does not power the broadcasting of a signal.
The Vizbee generic platform has many unique features and an open architecture. APIs and an SDK enable easy bi-directional integration with other security systems.
- Museums & Galleries
- Logistics & Transport
- Open-Air Depots & Construction Sites
- Guard Duty Patrols
- Retail Marketing Intelligence
There is no one RFID hardware system that is superior to all the others from every point of view. Each system has its own relative advantages. For example, from the technical point of view 433MHz and 868Mhz are better for indoor applications since they work better through walls and partitions. The higher the frequency the more accurate the real-time location is by triangulation. Bi-directional systems allow queries and modification of tags on demand - something that is not possible with unidirectional systems. Many sites do not permit any RFID system to operate on the 2.4GHz frequency to avoid interference with existing Wi-Fi systems. And ultra-wide band is not authorized for outdoor applications. These are just a few examples.
Also, economics plays a role. The total cost of a project is a function of the number of tags, receivers and antennas, batteries and installation. These factors affect the choice of technology.
In terms of features, the equation becomes even more complex. Formats, communication protocols, sensors, tamper-detection, protection index, battery life and anti-collision protocols are just a few. Needing a specific feature may prevent you from selecting another technology that could offer a better solution for another reason.
It is important to remember that RFID is a dynamic field, with technology that is advancing at a rapid pace. Platforms that are developed by, or closely related to, hardware manufacturers are limited. The Vizbee platform is integrated with all leading technologies enables the right technology mix for every project and always remain up-to-date with best-of-breed solutions.
Whilst RFID work in indoor as well as outdoor environments, GPS works only outdoor as they need a line of sight with the satellites. On the other hand GPS have a nationwide coverage that is not feasible with RFID. Hence the advantage of the Vizbee platform that combines seamlessly RFID with GPS/GSM/GPRS in the same project.
Many projects may involve a combination of different applications. For example, one company may need asset protection, access control, guard tour monitoring and temperature control. Instead of running four applications, with four separate interfaces, rules, and hardware, the Vizbee platform integrates them all into a single, uniform system. This significantly reduces acquisition cost, since the same infrastructure (receivers, antennas, tags, etc.) are shared by all applications. Also, maintenance costs are lower since only one system needs to be maintained.
Shorter learning curve
Meet specific needs via parameter settings only
Define interactions between applications
Gradually add more applications easily
When you deploy a package-based system, you can demonstrate to the clients exactly what they will get prior to purchase. Installation of a pilot is swift. There is full control of costs and timetable, with implementation in weeks rather than lengthy and risky software development and testing cycles. The Vizbee platform is a mature, tested system with built-in features. There is regular release of new versions, with new features and technologies, for a future-proof investment, as well on the benefit of ongoing development of new expert applications compatible with the platform.
Vizbee sells a complete turnkey RFID system that includes the software license for the integrated platform and all related hardware (tags, receivers, antennas etc.). There is an option to subscribe to a yearly maintenance program for free yearly releases and updates.
Vizbee sells exclusively through a network of certified distributors. Vizbee distributors are either regional, or specialized by sub-verticals.
We are looking for proven professionals who have an established reputation in our target markets, with ongoing working relationships with relevant integrators and installers and a dedicated marketing team. Partners must have suitable technical teams to support integrators and installers, as well as showroom facilities and marketing capabilities.