Disclosed is a system for electromagnetic interrogation of RFID transponders including at least one RFID terminal configured to emit an interrogation signal at a frequency F1, at least one RFID device referred to as repeater configured to receive the interrogation signal with frequency F1 and to repeat same towards at least one RFID transponder at the frequency F2, characterized in that the at least one RFID terminal includes at least one RFID reader configured to emit an interrogation signal with frequency F0 and at least one add-on RFID device configured to perform a frequency transposition from the frequency F0 to the frequency F1, the frequencies F0 and F1 being different.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
H04B 5/02 - Near-field transmission systems, e.g. inductive loop type using transceiver
The present invention relates to a secure communication method between an RFID transponder (20) and an RFID reader (10), the method comprising at least the following steps: - The RFID reader (10) sends a series of random numbers A1 to the RFID transponder (20); - Said RFID transponder (20) sends a series of random numbers A2 to the RFID reader (10); - The RFID reader (10) sends a result R1 to the at least one RFID transponder (20); - The RFID transponder (20) compares said result R1 with a result R1', and if R1' is equal to R1, then said RFID transponder switches a locked communication mode to an unlocked communication mode, and sends the result R2' to the least one RFID reader (10).
G06K 19/073 - Special arrangements for circuits, e.g. for protecting identification code in memory
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
G06K 17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups , e.g. automatic card files incorporating conveying and reading operations
Disclosed is a system for electromagnetic interrogation of RFID transponders including at least one RFID transponder, at least one so-called repeater RFID device and at least one RFID terminal, the at least one RFID terminal is configured to emit an interrogation signal towards the at least one repeater at a frequency F1, the at least one repeater is configured to repeat the interrogation signal with frequency F1 towards the at least one RFID transponder at a frequency F2 and the at least one RFID transponder is configured to emit a backscattered response signal at a frequency F3, the system being characterized in that the at least one repeater is configured to perform an exclusively analog frequency transposition from the frequency F1 to the frequency F2.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
4.
Method of discriminating RFID tags in motion from static RFID tags
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (France)
UNIVERSITE AMIENS PICARDIE JULES VERNE (France)
Inventor
Loussert, Christophe
Kervella, Brigitte
Zancanaro, Mario Antônio
Pereira Fonseca, Mauro Sergio
Akre, Niamba Jean-Michel
Fladenmuller, Anne
Baey, Sébastien
Abstract
Some embodiments are directed to a method and a system allowing moving tags to be discriminated from stationary tags, which can be used in the field of tracking merchandise or objects provided with RFID tags.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
5.
DEVICE AND SYSTEM FOR CHECKING THE PRESENCE OF ARTICLES ON SHELVES AND CORRESPONDING METHOD
The invention relates to a device (1) for checking the presence of articles on a shelf. The device comprises: - a detector circuit (11) for detecting the presence of at least one article placed in at least one area of said shelf, termed the shelf area, said detector circuit being capable of switching between a state, termed the article detection state, in which it detects the presence of at least one article in said shelf area, and a state, termed the article non-detection state, in which it does not detect any article in said shelf area, - an RFID tag (10) connected to the detector circuit (11) is capable of reading and storing the article detection state or article non-detection state, of the detector circuit, said RFID tag further comprising an identification code for identifying said shelf area and being arranged to communicate said identification code and the state of the detector circuit to a remote RFID reader (2).
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
G06K 17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups , e.g. automatic card files incorporating conveying and reading operations
6.
SYSTEM FOR LOCATING AN OBJECT FURNISHED WITH AN RFID TAG
The present invention relates to a system for locating an object furnished with a tag (20) in a predetermined space. The tag (20) is interrogatable remotely by an RFID reader (10). According to the invention, a zone of sound (Z) is created with an ultrasound generator. A sound wave of frequency f1-f2 is present in this zone. The tag is equipped with an acoustic sensor (203) able to sense the signals of frequency f1-f2 and this acoustic sensor is designed together with said tag to modify the content or the level of the RFID tag response signal when said acoustic sensor receives a signal of frequency f1-f2. The RFID reader is then able to locate said object in said zone of sound when it receives the modified response signal (R') from said RFID tag or when it no longer receives any response signal from said RFID tag.
G01S 5/18 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
G01S 1/82 - Rotating or oscillating beam beacons defining directions in the plane of rotation or oscillation
G01S 1/76 - Systems for determining direction or position line
G01S 13/75 - Systems using reradiation of radio waves, e.g. secondary radar systemsAnalogous systems using transponders powered from received waves, e.g. using passive transponders
7.
METHOD OF DISCRIMINATING RFID TAGS IN MOTION FROM STATIC RFID TAGS
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (France)
UNIVERSITE AMIENS PICARDIE JULES VERNE (France)
Inventor
Loussert, Christophe
Kervella, Brigitte
Zancanaro, Mario Antônio
Pereira Fonseca, Mauro Sergio
Akre, Niamba Jean-Michel
Fladenmuller, Anne
Baey, Sébastien
Abstract
The invention relates to a method for discriminating tags in motion from static tags. It comprises the following steps:- sending (E1), from first and second remote reading stations (A, B) placed along the path of the tags in motion, first and second interrogation signals destined for the RFID tags, - determining (E2,E3,E4) whether the two reading stations receive response signals from tags in response respectively to said first and second radiofrequency interrogation signals so that, for a current tag, if just one of the two reading stations receives a response signal from said current tag, said current tag is a static tag, and if both reading stations each receive a response signal from said current tag, a method of learning based recognition is applied to determine whether the current tag is static or in motion.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
According to one aspect, the invention relates to a system for electromagnetically querying RFID transponders (300). Said system includes: - at least one RFID transponder (300); - at least one RFID device referred to as a "repeater" (200); and - at least one RFID terminal (100). The at least one RFID terminal (100) is configured to transmit a query signal to the at least one repeater (200) at a frequency F1. The at least one repeater (200) is configured to repeat said query signal at a frequency F1 to the at least one RFID transponder (300) at a frequency F2, and the at least one RFID transponder (300) is configured to transmit a backscattered response signal at a frequency F3. The system is characterized in that the at least one repeater (200) is configured to carry out an analog-only frequency transposition from Frequency F1 to Frequency F2.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
9.
SYSTEM FOR QUERYING RFID TRANSPONDERS VIA FREQUENCY TRANSPOSITION
According to one aspect, the present invention relates to a system for electromagnetically querying RFID transponders (300). Said system includes: - at least one RFID terminal (100) configured so as to transmit a query signal at a frequency F1; and - at least one RFID device referred to as a "repeater" (200) configured so as to receive the query signal of Frequency F1 and repeat it to at least one RFID transponder (300) at Frequency F2. Said system is characterized in that the at least one RFID terminal includes at least one RFID reader (110), configured to transmit a query signal of Frequency F0, and at least one additional RFID device (120), configured so as to carry out a frequency from Frequency 0 to Frequency 1, Frequencies F0 and F1 being different.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
10.
SYSTEM FOR IDENTIFYING OBJECTS PROVIDED WITH RFID TAGS
The invention relates to a system for identifying objects in a predetermined space, including a plurality of RFID transponders (1) carried by the objects to be identified and an RFID reader (2) for reading the information contained in the transponders. The reader is capable of emitting at least one UHF querying signal (S1) to the transponders. In a first operating mode, the transponders are powered by said querying signal and, in response to the querying signal, send back a UHF response signal (S2) by back-modulation to the reader. The system also comprises at least one radiofrequency power source (3), contained in an area (Z1) of said space and capable of emitting an energy signal (S3) toward the transponders of the area. In a second operating mode, the transponders (1) contained in the area are powered by the energy signal (S3) and send back a response signal in response to the querying signal (S1).
The invention concerns a method for producing a radio-frequency identification tag comprising a textile support intended to receive a radio-frequency identification module coupled to an electrical antenna. The method comprises the following steps: • a) depositing (El) a thermosetting adhesive layer on an area of the textile support, • b) depositing (E2) said electrical antenna on the adhesive layer; • c) depositing (E3) said radio-frequency identification module on the antenna and the adhesive layer, the radio-frequency identification module being positioned in such a way as to be coupled to the antenna and at least partially in contact with the adhesive layer; • d) folding (E4) the textile support in such a way as to cover said antenna and said radio-frequency identification module; and • e) hot pressing (E5) the folded textile support in such a way as to at least partially embed the antenna and the radio-frequency identification module in the adhesive layer and at least partially polymerise said adhesive layer.
G06K 19/02 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
The invention relates to a device (1) for the identification of an object (B), said device comprising an RFID module (10) operating at a predetermined operating frequency (F), means (11) for fixing said RFID module to said object, and a substantially rectilinear radiating element resonating at the operating frequency and forming an electrical antenna (14), which electrical antenna is intended to be coupled with said RFID module. According to the invention, the radiating element (14) is placed on or in the means for fixing the RFID module to said object and the fixing means (11) are configured so as to distance at least one end of said radiating element (14) with respect to a peripheral surface of said object.
The present invention relates to a miniaturized patch antenna assembly in UHF frequency band. The invention is notably useful in RFID applications. The patch antenna assembly comprises: - a multilayered dielectric substrate including at least a top layer, a middle layer and a bottom layer, - an electrically conductive patch structure on the upper surface of the top layer, said patch structure having a centre point located at the centre of patch structure surface and a feeding point electrically coupled to a feed line, - a ground plane on the lower surface of the bottom layer. According to the invention, it further comprises a slot etched in the patch structure, said slot surrounding the centre point of the patch structure. This slot aims to concentrate the surface current at the centre of the patch structure, which allows reducing its size.
The present invention relates to a RFID communication system comprising an interrogator (10) including a signal generator (12) for generating an interrogation signal at a predetermined frequency f0 and a first interrogator antenna (11) for transmitting said interrogation signal and receiving a first reply signal at a frequency f0, and processing means (13), and a passive transponder (20) including a first transponder antenna (21) for receiving said interrogation signal and a chip (22) comprising nonlinear components for generating said first reply signal in response to the interrogation signal, said first reply signal being transmitted by said first transponder antenna. According to the invention, the interrogator is arranged to receive a second reply signal whose frequency is a multiple of the predetermined frequency f0, said multiple being either odd or even, said second reply frequency being generated by the nonlinear components of the transponder chip, said first and second reply signals being processed by the processing means of the interrogator in order to complete or improve the functionality of the system.
H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
The present invention relates to a RFID reader comprising an antenna system for emitting and receiving RFID signals. The antenna system comprises at least a first inverted F antenna (10) and a second inverted F antenna (11) each comprising a feed element (101,111), a radiating element (102,112) having a first end coupled to the feed element and a second end free, and a tuning element (103,113) having a first end coupled to the ground plane and a second end coupled to the first end of the radiating element. The radiating elements (102, 112) of the two inverted F antenna extend in a first direction and a second direction respectively, said first and second directions being offset by a non-zero sequential rotation. In addition, the two inverted F antennas are isolated from each other by a quarter wavelength slot (160) etched in the ground plane between the two antennas.
The invention relates to a device for the identification of at least one object (1), said device comprising at least one contactless RFID tag (2) arranged in proximity to said object, said object being present on an object support (3) or a rack, each tag containing an electronic chip (212) and a magnetic antenna (211) connected to said chip, said device furthermore comprising an electric antenna (34). According to the invention, the electric antenna is present in the object support and is arranged in the latter in such a way as to establish electromagnetic coupling between the electric antenna and the magnetic antenna of the tag. Thus, the dimensions of the electric antenna, and particularly its length, are not then limited by the dimensions of the tag.
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
G06K 19/077 - Constructional details, e.g. mounting of circuits in the carrier
The invention relates to an RFID electronic tag (100) comprising: -an RFID microchip (120) for receiving information included in an electromagnetic radiation, -a processing unit (150) for processing said information, -display means(160) for displaying said processed information; -a RF antenna (110) coupled to said RFID microchip and to an energy harvester (130) deemed to collect energy from electromagnetic radiation and to provide energy at least to said processing unit and said display means,and -a means for fixing said tag to an object.
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
G06K 19/077 - Constructional details, e.g. mounting of circuits in the carrier
The present invention relates to a circularly polarized directional helical antenna (30) that is capable of being used in RFID devices and more particularly in RFID readers. Said antenna is intended to transmit or receive signals in a predetermined frequency band, λ being the wavelength associated with the minimum frequency of said predetermined frequency band. It comprises: -a helicoidal radiating element(31) made of conductive material extending along a longitudinal axis (A) and the axial length (H) of which is less than the wavelength λ, and -a cavity (32) made of conductive material having an open end and a closed end and having an axis of symmetry that coincides with the longitudinal axis of the radiating element, at least one lower portion of said radiating element being arranged inside said cavity so that its lower end is in contact with the closed end of the cavity.
The invention relates to a radio-frequency identification device of the non-contact type, suitable for fixing to an object to be identified, said device comprising: a module (1) comprising at least one electronic chip and at least one electrical and/or magnetic so-called primary antenna used to supply signals to said at least one electronic chip, and an electrical and/or magnetic so-called secondary antenna (60). According to the invention, the secondary antenna is a conductive element (60) that forms part of said object or is produced by modifying a constituent of said object, said secondary antenna being coupled to said primary antenna without an electrical connection.
patents
