bacaartikeldisiniaja -- Radio Frequency Identification (RFID) is a generic term for technologies that use radio waves to automatically identify people and things. There are several methods of identification, but the most common is to store a serial number and possibly other information that identifies a person or thing in a microchip attached to an antenna (chip and antenna collectively called RFID tags). Or RFID tags.
Please go to http:See details at //www.bigsquid.org). The antenna allows the chip to transmit identification information to the reader. The reader can convert the radio waves reflected back from the RFID tag into digital information and pass it to a computer where it can be used.
The purpose of RFID systems is to transmit data in appropriate transponders, commonly called tags, and retrieve data via machine-readable means at the appropriate time and place to meet the needs of a particular application. The data in the label can provide identification of the item being manufactured, the item being transported, the location, and the vehicle, animal, or person. The inclusion of additional data provides prospective customers with item-specific information or instructions that support their application out of the box by reading the label.
In addition to the tag, the system requires a means of reading or interrogating the tag and a means of communicating the data to a host computer or information management system. The system also includes means for entering or programming data into the tag. It is not uncommon for the antenna to be distinguished as if it were another part of the RFID system. Although its importance is cautioned, it is a feature present in both the reader and the tag and should be considered essential for communication between them.
To understand and evaluate the functionality of an RFID system, we need to examine its components. Data flow requirements must also be considered as they affect system choice and the practicality of communicating over the air interface. By considering the system components and their functions in the data flow chain, we can capture most of the important aspects that affect the effective use of RFID.
However, because the technologies involved have a significant impact on the design of system components, it is advisable to first briefly consider how wireless communication is achieved.
Components of RFID
RFID Reader:
A reader is a radio frequency device used to read data from the microchip contained in an RFID tag. RFID readers communicate with tags using a variety of methods. The most common method of reading passive tags at close range is called inductive coupling. Simply put, the reader's coiled antenna creates a magnetic field in the tag's coiled antenna. The tag draws energy from this field and uses it to send waves back to the leader. This wave is converted into digital information (the tag's electronic product code).
A reader consists of a transmitter, a receiver, a control module and a communication facility (sometimes called a transceiver in radio terminology) and connects to a control PC. The reader must be equipped with an antenna that is used to send and receive radio frequency signals. Each reader comes with PC compatible software that allows the user to read and program the tags. Win 2K, XP, ME are some of the operating systems compatible with the reader.
RFID tags:
An RFID tag or transponder is a wireless system consisting of an electronic chip (semiconductor device) with memory that can store data.
