19-03-2014, 11:54 AM
LF OEM RFID Module - DT 125R
[attachment=60233]
The DT125R series RFID Proximity OEM Reader Module has a built-in Antenna. It is designed to work on the industry standard carrier frequency of 125 kHz. This LF reader module with an internal/external antenna facilitates communication with Read-Only transponders - type UNIQUE or TK5530via the air interface. The tag data is sent to the host systems via the wired communication interface with a protocol selected from the module pinout.
Data transmission in ASCII standard
Data read from the tag is Manchester encoded. The Manchester encoded data is decoded to ASCII standard. Decoded data is sent to the UART serial interface for wired communication with the host systems
Data transmission in Wiegand 26 standard
The composition of the open existing industry standard 26- bit Wiegand format contains 8 bits for the facility code field and 16 bits for the ID number field. Mathematically these 8 facility code bits allow a total of 256 (0 to 255) facility codes, while the 16 ID number bits allow a total of only 65,536 (0 to 65,535) individual ID's within each facility code.
The Data 1 and Data 0 signals are held at logic high level (above the Voh level) until the reader is ready to send a data stream. The output comprises of 3 bytes of data. Binary 1 is indicated as low pulse on DATA 1(pin 4) line and binary zero by low pulse on DATA 0(pin 3) lines. The Data 1 and Data 0 pulses do not overlap or occur simultaneously
Components of RFID Systems
An RFID system is always made up of two components
• The transponder, which is located on the object to be identified;
• The interrogator or reader, which, depending upon the design and the technology
Used, may be a read or write/read device.
A practical example is shown in Figure X. A reader typically contains a radio frequency module (transmitter and receiver), a control unit and a coupling element to the transponder.
RFID
In 1946, a Russian invented an espionage tool called the Covert Listening Device. This device retransmitted incident radio waves with audio information. Sound waves vibrated a diaphragm which slightly altered the shape of the resonator, which modulated the reflected radio frequency. This passive device was attributed to be the first known device and a predecessor of the RFID technology.
The British invented a similar system during the World War II to identify enemy aircraft. It was called the Identification of Friend or Foe (IFF). Initial application was during World War II-The United Kingdom used RFID devices to distinguish returning English airplanes from inbound German ones. RADAR was only able to signal the presence of a plane, not the kind of plane it was. It was invented in 1948 by Harry Stockman. In 1971, an RFID device that was passive, powered by the interrogating signal, with a 16-bit memory transponder was invented. This device was the true ancestor to modern RFID and was patented in 1973 in the USA that had demonstrated its uses in:
Transportation (automotive vehicle identification, automatic toll system, electronic license plate, electronic manifest, vehicle routing, vehicle performance monitoring)
Banking (electronic check book, electronic credit card), security (personnel identification, automatic gates, surveillance)
Medical (identification, patient history)
It came into commercial use only in 1990s.
Radio frequency identification (RFID) technology is a wireless communication technology that enables users to uniquely identify tagged objects or people. RFID is rapidly becoming a cost-effective technology. This is in large part due to the efforts of Wal-Mart and the Department of Defense (DoD) to incorporate RFID technology into their supply chains. Although the foundation of the Radio Frequency Identification (RFID) technology was laid by past generations, only recent advances opened an expanding application range to its practical implementation.
RFID Concept
The RFID technology is a means of gathering data about a certain item without the need of touching or seeing the data carrier, through the use of inductive coupling or electromagnetic waves. The data carrier is a microchip attached to an antenna (together called transponder or tag), the latter enabling the chip to transmit information to a reader (or transceiver) within a given range, which can forward the information to a host computer. The middleware (software for reading and writing tags) and the tag can be enhanced by data encryption for security-critical application at an extra cost, and anti-collision algorithms may be implemented for the tags if several of them are to be read simultaneously.
One important feature enabling RFID for tracking objects is its capability to provide unique identification. One possible approach to item identification is the EPC (Electronic Product Code), providing a standardized number in the EPC global Network, with an Object Name Service (ONS) providing the adequate Internet addresses to access or update instance-specific data. However, currently, ONS cannot be used in a global environment, and since it is a proprietary service, its use is relatively expensive, especially for participants with limited resources such as SMEs. As an alternative, researchers from the Helsinki University have proposed the notation ID@URI, where ID stands for an identity code, and URI stands for a corresponding Internet address. This allows several partners to use the system and still guarantee unique identification. The project ‘Identity-Based Tracking and Web-Services for SMEs’ (http://www.traser-project.eu) is currently working on further development of this concept.
RFID tags or radio-frequency identification tags are helping streamline distribution, logistics and asset tracking and rapidly replacing traditional barcode technology as the solution of choice for company's in nearly every industry sector globally. With the increasing success and popularity of RFID more demands are being placed on its performance.
[attachment=60233]
The DT125R series RFID Proximity OEM Reader Module has a built-in Antenna. It is designed to work on the industry standard carrier frequency of 125 kHz. This LF reader module with an internal/external antenna facilitates communication with Read-Only transponders - type UNIQUE or TK5530via the air interface. The tag data is sent to the host systems via the wired communication interface with a protocol selected from the module pinout.
Data transmission in ASCII standard
Data read from the tag is Manchester encoded. The Manchester encoded data is decoded to ASCII standard. Decoded data is sent to the UART serial interface for wired communication with the host systems
Data transmission in Wiegand 26 standard
The composition of the open existing industry standard 26- bit Wiegand format contains 8 bits for the facility code field and 16 bits for the ID number field. Mathematically these 8 facility code bits allow a total of 256 (0 to 255) facility codes, while the 16 ID number bits allow a total of only 65,536 (0 to 65,535) individual ID's within each facility code.
The Data 1 and Data 0 signals are held at logic high level (above the Voh level) until the reader is ready to send a data stream. The output comprises of 3 bytes of data. Binary 1 is indicated as low pulse on DATA 1(pin 4) line and binary zero by low pulse on DATA 0(pin 3) lines. The Data 1 and Data 0 pulses do not overlap or occur simultaneously
Components of RFID Systems
An RFID system is always made up of two components
• The transponder, which is located on the object to be identified;
• The interrogator or reader, which, depending upon the design and the technology
Used, may be a read or write/read device.
A practical example is shown in Figure X. A reader typically contains a radio frequency module (transmitter and receiver), a control unit and a coupling element to the transponder.
RFID
In 1946, a Russian invented an espionage tool called the Covert Listening Device. This device retransmitted incident radio waves with audio information. Sound waves vibrated a diaphragm which slightly altered the shape of the resonator, which modulated the reflected radio frequency. This passive device was attributed to be the first known device and a predecessor of the RFID technology.
The British invented a similar system during the World War II to identify enemy aircraft. It was called the Identification of Friend or Foe (IFF). Initial application was during World War II-The United Kingdom used RFID devices to distinguish returning English airplanes from inbound German ones. RADAR was only able to signal the presence of a plane, not the kind of plane it was. It was invented in 1948 by Harry Stockman. In 1971, an RFID device that was passive, powered by the interrogating signal, with a 16-bit memory transponder was invented. This device was the true ancestor to modern RFID and was patented in 1973 in the USA that had demonstrated its uses in:
Transportation (automotive vehicle identification, automatic toll system, electronic license plate, electronic manifest, vehicle routing, vehicle performance monitoring)
Banking (electronic check book, electronic credit card), security (personnel identification, automatic gates, surveillance)
Medical (identification, patient history)
It came into commercial use only in 1990s.
Radio frequency identification (RFID) technology is a wireless communication technology that enables users to uniquely identify tagged objects or people. RFID is rapidly becoming a cost-effective technology. This is in large part due to the efforts of Wal-Mart and the Department of Defense (DoD) to incorporate RFID technology into their supply chains. Although the foundation of the Radio Frequency Identification (RFID) technology was laid by past generations, only recent advances opened an expanding application range to its practical implementation.
RFID Concept
The RFID technology is a means of gathering data about a certain item without the need of touching or seeing the data carrier, through the use of inductive coupling or electromagnetic waves. The data carrier is a microchip attached to an antenna (together called transponder or tag), the latter enabling the chip to transmit information to a reader (or transceiver) within a given range, which can forward the information to a host computer. The middleware (software for reading and writing tags) and the tag can be enhanced by data encryption for security-critical application at an extra cost, and anti-collision algorithms may be implemented for the tags if several of them are to be read simultaneously.
One important feature enabling RFID for tracking objects is its capability to provide unique identification. One possible approach to item identification is the EPC (Electronic Product Code), providing a standardized number in the EPC global Network, with an Object Name Service (ONS) providing the adequate Internet addresses to access or update instance-specific data. However, currently, ONS cannot be used in a global environment, and since it is a proprietary service, its use is relatively expensive, especially for participants with limited resources such as SMEs. As an alternative, researchers from the Helsinki University have proposed the notation ID@URI, where ID stands for an identity code, and URI stands for a corresponding Internet address. This allows several partners to use the system and still guarantee unique identification. The project ‘Identity-Based Tracking and Web-Services for SMEs’ (http://www.traser-project.eu) is currently working on further development of this concept.
RFID tags or radio-frequency identification tags are helping streamline distribution, logistics and asset tracking and rapidly replacing traditional barcode technology as the solution of choice for company's in nearly every industry sector globally. With the increasing success and popularity of RFID more demands are being placed on its performance.