Abstract:
넓은 범위에 분포되어 있는 발효저장소의 발효 상태에 대해서 효율적이고 주기적으로 모니터링 할 수 있도록 장거리 RFID 태그 및 그 동작방법이 개시된다. 본 발명의 실시 예에 따르면 장거리 RFID 태그는 안테나부, 신호 증폭부, 데이터 처리부를 포함한다. 이에 따라 장거리 RFID 태그를 통하여 장거리에서도 리더기와 통신이 가능할 수 있게 되어 넓은 범위에 분포되어 있는 발효저장소들의 발효상태에 대하여 발효저장소에 부착된 센서가 수집한 정보를 장거리에 위치한 리더에 전송하여 모니터링이 가능하게 된다.
Abstract:
본 발명에 따른 안테나 포트 확장을 위한 하이브리드 스위치 및 그 제어방법과 이를 이용한 RFID 시스템은 RFID(Radio Frequency Identification) 리더기에 연결될 수 있는 안테나 포트의 개수를 더 늘려서 전파 음영 지역을 최소화함으로써 RFID 태그를 인식하는데 더 효율적으로 사용이 가능하고, 더욱이 하이브리드 스위치들 사이의 연결 구조 및 리더기와 하이브리드 스위치 간의 케이블 연결구조가 가 간단하며, 하이브리드 스위치의 상태 정보를 1-라인 케이블을 통해 리더기로 전송함으로써 사용자는 효율적인 시스템 운용이 가능하며, 또한 전용 리더기뿐만 아니라 기존의 상용 리더기 시스템과도 호환이 가능하여 범용적으로 사용이 가능한 이점이 있다.
Abstract:
A tag of an apparatus to simultaneously identify massive tags according to the present invention may include an analog circuit unit to communicate with a reader through an analog signal and to receive energy via magnetic coupling with the reader. Furthermore, the tag may include a digital circuit unit to be supplied with power from the analog circuit unit. The digital circuit unit may support a sleep mode for the tag to stand by in a low power state after transmitting an identifier (ID) to the reader and a wait mode to control random access to the reader. [Reference numerals] (110) Reader; (130) Recognition area; (140,AA,BB,CC,DD,EE,FF,GG,HH,II) Tag
Abstract:
본 발명은 다량의 태그를 보다 신속하게 인식할 수 있도록 하는 수동형 RFID 시스템 및 방법에 관한 것으로, 상기 리더는 슬롯 명령어와 슬립 명령어를 동시에 생성하여 충돌 및 간섭이 발생하지 않는 서브채널을 파악함과 동시에 이전 슬롯에서 충돌 및 간섭이 발생하지 않는 서브채널을 사용한 태그는 슬립 상태로 진입되도록 하는 프로세서; 상기 슬롯 명령어와 슬립 명령어를 동시에 인코딩 및 크기지터 변조하여 송출하는 송신부; 및 슬롯별로, 다중 서브채널로 수신되는 태그신호를 복조하여 상기 프로세서에 제공하는 수신부를 포함할 수 있다.
Abstract:
PURPOSE: A reader antenna and an RFID electronic shelf including thereof are provided to form the time varying near field on the electronic shelf, thereby improving the recognition rate. CONSTITUTION: A horizontal dipole antenna (1) has the horizontally polarized wave property. A vertical dipole antenna (2) is perpendicularly equipped in the horizontal dipole antenna. The vertical dipole antenna has the vertically polarized wave property. A dipole antenna (3) comprises the horizontal dipole antenna and the vertical dipole antenna. The reader antenna has the circular polarization property.
Abstract:
PURPOSE: A hybrid switch, a controlling method thereof, and an RFID system using the same are provided to minimize electric wave shadow area by increasing the number of antenna ports which are connected to a reader. CONSTITUTION: A switching module(208) sets up a path in order for a signal of a reader to pass through antenna ports. An antenna sensing module(210) determines an antenna port to which an antenna is attached. A communication module(205) processes a communication signal with the reader or the other switch. A GPIO(General Purpose Input/Output) communication unit(220) controls a GPIO input/output signal. A power module rectifies a control signal through a direct current rectifier circuit.
Abstract:
PURPOSE: A passive RFID system and method are provided to transmit a tag signal with one slot and a frequency band. CONSTITUTION: A processor(110) transits a sub channel in which collision and interference does not generate to a sleep status. A transmitting unit(120) performs the encoding of a command generated in the processor and size jitter modulation. In order that the processor grasps the sub channel by slot in which collision and interference does not generate, a receiving unit(130) performs the acquisition and demodulation of a tag signal by slot received through a plurality of sub channels. The receiving unit offers the processed tag signal to the processor.
Abstract:
A method and a mobile RFID reader which controls TDMA of a mobile RFID reader through a mobile base station are provided to prevent interference between readers by occupying a channel during a time slot and frequency allocated in the mobile RFID reader. A mobile RFID(Radio Frequency Identification) reader requests a channel for RFID communications with a tag as a base station through the uplink channel according to the protocol of the mobile network(S610). The base station assigns the channel information of the transmission channel and transmit window to the mobile RFID reader through the downlink channel according to the protocol of the mobile network(S630). The mobile RFID reader performs the tag selected according to the channel information in the allocated frequency channel for the designated time slot(S650). The mobile RFID reader transmits the history information collected for the inventory round to the base station after the inventory round termination(S670).
Abstract:
An RFID(Radio Frequency IDentification) device integrating an RFID reader and an RFID tag is provided to offer a function of the RFID tag and the RFID reader flexibly according to a use purpose by supporting the tag and reader functions at the same time, as the RFID tag and the RFID reader are integrated in one device. A back-scatter RFID tag analog unit(10) multiplexes/outputs tag data in a back-scatter mode and demultiplexes a command received from an RFID reader. An RFID reader analog unit(20) multiplexes/outputs the command to the RFID tag and demultiplexes the received tag data to be operated as the RFID reader. An SPDT(Single Pole Double Throw) switch(40) connects the back-scatter RFID tag analog unit or the RFID reader analog unit to an antenna based on a switch control signal received from an RFID reader/tag integrated digital unit(30). The RFID reader/tag integrated digital unit outputs the switch control signal to the switch according to a request for operating a tag mode, activates the back-scatter RFID tag analog unit, reads the tag data by receiving the command from the RFID reader through the back-scatter RFID tag analog unit, and transfers the read tag data to the back-scatter RFID tag analog unit.
Abstract:
A reader/tag integrated RFID(Radio Frequency IDentification) device and a method thereof are provided to reduce a system size and increase portability by performing a reader and tag function without inter-collision. A tag unit(103) transmits a response signal and data responding to a signal received from an external reader by communicating with the external reader. A reader unit(105) communicates with an external tag by using a random value, which is selected to minimize the inter-collision by selecting a channel with a different delay time between other reader and the reader/tag integrated RFID device. A controller(101) activates the reader or tag unit selectively, and controls the activated unit. The reader unit includes a random value generator(233) generating the random value for selecting the channel with the delay time different from other readers, a collision arbiter(238), a reader transmitter(234) generating/transmitting a reader command message determined by the collision arbiter, a reader receiver(235), and a channel operation controller.