233 results about "Tag antenna" patented technology

The invention discloses an integrated sensing and backscatter communication method and device based on backscatter, and relates to the technical field of wireless communication, and the method comprises the steps: receiving an open-circuit pilot frequency receiving voltage and a short-circuit pilot frequency receiving voltage generated by a receiving antenna based on a pilot frequency signal; determining a tag antenna mode pilot frequency voltage component and a clutter tag structure combined pilot frequency voltage component, and correspondingly determining a tag antenna mode reflection coefficient and a clutter tag structure combined reflection coefficient based on the tag antenna mode pilot frequency voltage component and the clutter tag structure combined pilot frequency voltage component by adopting a compressed sensing algorithm; and transmitting a data signal to a receiving antenna through the tag by adopting binary phase shift keying, collecting a data receiving voltage, and completing signal demodulation by adopting the data receiving voltage, a tag antenna mode reflection coefficient and a combined reflection coefficient to obtain a bit mapping symbol of the data signal. The backscatter communication is realized through combination of backscatter and tag impedance modulation, and the backscatter communication performance is improved.

The invention relates to the technical field of antenna calibration, and provides an RFID tag antenna adaptive calibration method based on complex environment identification. The method comprises the steps that warehouse attribute features are collected, a three-dimensional space is constructed based on the features, RFID signal interference simulation is carried out, and an interference area is obtained through clustering; in order to meet signal requirements, RFID antenna control parameter calibration is carried out on a plurality of areas, a calibration strategy is determined, and a warehouse position calibration table is constructed; querying a path by a reader, and matching a target interference area with a calibration strategy; external interference factors are acquired and read through a monitoring array, an optimization calibration strategy is analyzed and output, and an optimization parameter calibration scheme is generated; according to the method, the real-time position information of the RFID reader-writer is obtained, a scheme is input, a real-time calibration strategy is output, and the RFID antenna is calibrated in a self-adaptive mode, so that the technical problems that the RFID antenna calibration efficiency is low and the accuracy is poor due to the fact that a traditional RFID antenna calibration method cannot rapidly adapt to environment changes are solved.

The invention discloses a high-sensitivity metal micro-strain sensor label and a detection method thereof, which are applied to the field of nondestructive testing and the field of structural health monitoring. The problems that an existing tag antenna is low in strain detection sensitivity and difficult in micro-strain detection are solved. The high-sensitivity metal micro-strain RFID sensing tag is attached to the surface of a component, when the tag deforms, the impedance change of the tag is Zsened, and the radar cross section changes accordingly; the reader can remotely monitor antenna parameters according to the change of the RCS0, the RCS1 and the intensity while communicating with the tag, so that the change of the intensity RSSI of an echo signal is deduced, and the deformation of the tag is indirectly known; when the impedance of the tag antenna changes, the resonant frequency of the tag changes accordingly, and the deformation information of the tag can be indirectly obtained by analyzing the deviation of the resonant frequency.

The invention provides a warehouse cargo positioning method and device based on an RFID tag antenna, and relates to the technical field of wireless orientation, and the method comprises the steps: obtaining a tag configuration feature set, and laying an RFID reader-writer and an antenna array; in the cargo carrying process, a storage image is collected, label configuration feature changes of cargos in the image are recognized, and a changed label configuration feature set is obtained; according to the target label information of the target goods, searching and positioning are carried out by using the RFID reader-writer array and the antenna array, and a positioning result of the target goods is obtained; and selecting a reader-writer and an antenna for transmitting a positioning radio frequency signal for positioning according to the changed tag configuration feature set. According to the invention, problems of difficult cargo positioning, low positioning efficiency and insufficient positioning precision caused by signal attenuation of reflection, shielding and the like of RFID signals in a warehouse in the prior art can be solved, real-time tracking of the cargo is realized, the positioning accuracy and efficiency are improved, and the warehousing efficiency is improved.

The utility model provides a miniaturized tunable ultrahigh frequency RFID tag antenna with an embedded interdigital structure. The miniaturized tunable ultrahigh frequency RFID tag antenna is composed of a tag chip (6), a top metal radiation unit and a bottom dielectric substrate (7). The top radiation unit comprises a rectangular ring (1), a first L-shaped gradually-changing bending arm (2), a second L-shaped gradually-changing bending arm (3), a first interdigital center metal belt (4) and a second interdigital center metal belt (5). The rectangular ring (1), the L-shaped gradually-changed bending arm and the interdigital central metal belt are all located above the dielectric substrate (7); the rectangular ring is located in the center of the top metal radiation unit; the L-shaped gradually-changed bending arms are located on the left side and the right side of the rectangular ring. The tag chip is located on a horizontal strip on one side of the rectangular ring; the interdigital center metal belt is located in a center gap formed by mirror symmetry of the left part and the right part of the L-shaped gradually-changed bent arm. The tunable laser has the advantages of being small in overall size, simple in structure and tunable, and is suitable for being applied to the surfaces of objects of various shapes and sizes.

The invention belongs to the technical field of sensors, and particularly relates to a passive NFC aircraft tire temperature and pressure composite sensor system which comprises a filler neck, a rear cover, a pressure core, a conversion circuit board, a conditioning circuit board assembly and a tag antenna assembly. The filler neck is a two-stage step column; the small-diameter end of the filler neck is provided with an air inlet, and the large-diameter end is provided with a cavity; the pressure core body is arranged in the air inlet hole; the pressure core body is connected with the conversion circuit board; the conversion circuit board is connected with the conditioning circuit board assembly; the conditioning circuit board assembly is fixed on the step surface of the cavity at the large-diameter end of the filler neck through a supporting screw; the tag antenna assembly is installed on the supporting screws through the fixing screws. The rear cover is screwed at the large-diameter end of the filler neck; the small-diameter end of the filler neck is connected with a tire through external threads.

The invention discloses a phase-free integrated sensing and backscatter communication method based on inverse scattering and a related device. According to the invention, the load impedance of the tag is dynamically modulated, so that a receiving antenna receives pilot signals in different modulation states to enhance backscattering; estimating a clutter tag structure combination power component and a tag antenna power component according to the RSSI of the collected pilot signal, thereby sensing and identifying a tag; and transmitting a data signal to a receiving antenna by adopting ASK modulation through the tag, collecting the received RSSI of the receiving antenna, and performing signal demodulation by utilizing a zero-forcing algorithm, thereby effectively enhancing the reliability of backscatter communication.

The invention discloses a synchronous perception and backscatter communication method and device based on spatial modulation and backscatter, and relates to the technical field of communication, and the method comprises the steps: transmitting a pilot signal to a label through a transmitting array, modulating the load impedance of the label, and then backscattering the signal to a receiving array; the receiving voltage generated by the receiving array and the original channel matrix are adopted to determine the reflectivity of the clutter tag and the reflectivity of the tag antenna; positioning and identifying the tag based on the reflectivity of the clutter tag; extracting a target channel matrix for constructing a tag from the original channel matrix according to the tag antenna reflectivity; performing spatial modulation on the information bits through a transmitting array, generating constellation symbols and determining an activation label; and backscattering the constellation symbols to the receiving array through the activation tag by adopting the transmitting array, and demodulating and decoding by combining the target channel matrix to output information bits. The backscatter label is accurately positioned and identified in a disordered environment, and spatial modulation is integrated into backscatter communication, so that the reliability of backscatter communication is improved.

An RFID antenna optimization deployment method based on single-base communication and a phased array specifically comprises the following steps: establishing a channel link model based on a linear phased array antenna, and accurately estimating receiving power between a reader and a tag; a half-wave dipole antenna is used as a tag antenna, and a gain expression of a one-dimensional linear phased-array antenna is derived; integrating the reader antenna and the tag gain model into the same Cartesian coordinate system; establishing a channel link model on the basis, and constructing an RNP problem optimization model in a single-base communication mode; and an improved sparrow search algorithm EGOSSA is put forward to solve the RNP problem, a final optimal deployment scheme is obtained through iterative operation, and the RFID antenna optimization deployment method based on single-base communication and the phased array is completed. According to the method, the coverage rate of the system to the tags is improved, communication interference between the readers and the tags is reduced, and the method has certain guiding significance in improving the quality and efficiency of solving the RNP problem.

The invention relates to a communication port resource pairing device and method, and the device comprises a communication port which is provided with a main tag, the main tag comprises a main tag chip and a main tag antenna connected with the main tag chip, and the main tag antenna is wirelessly connected with a radio frequency identifier; and the communication plug is in mutual plugging connection with the communication port, the communication plug is provided with a slave tag, and the slave tag comprises a slave tag chip electrically connected with the master tag chip. When the communication plug and the communication port are mutually plugged and connected, the master tag chip is electrically connected with the slave tag chip, the slave tag chip does not need to be provided with an antenna, only the slave tag chip needs to be integrated on the communication plug, the size of the communication plug can be designed to be smaller, and the miniaturization requirement of a high-density wiring connector in the future is met. The radio frequency identifier associates and binds the information of the master tag chip and the information of the slave tag chip one by one, so that one-to-one entry of tag objects is omitted, and the resource information entry and association efficiency is greatly improved.

1. Name of the Design Product: Ultra-High Frequency Electronic Tag Antenna (C40F). 2. Use of the Design Product: The design product is an ultra-high frequency electronic tag antenna, used in clothing, retail, and logistics. 3. Design Key Points of the Design Product: Lies in the combination of shape and pattern. 4. Picture or Photograph Most Indicating the Design Key Points: Front View. 5. The design product is a thin product, and the left view, right view, top view, and bottom view are omitted.

1. Name of the Design Product: Ultra High Frequency Electronic Tag Antenna (F7030T). 2. Use of the Design Product: The design product is an ultra high frequency electronic tag antenna for asset management. 3. Design Key Points of the Design Product: The combination of shape and pattern. 4. Picture or Photograph that Best Illustrates the Design Key Points: Front View. 5. The design product is a thin product, and the left view, right view, top view and bottom view are omitted.

The application discloses a kind of based on space modulation and reverse scattering's synchronous sensing and reverse scattering communication method and device, it is related to communication technical field, including: through transmitting array to tag pilot signal and modulate the load impedance of tag again backscatter to receiving array;Using the receiving voltage generated by receiving array and original channel matrix determines clutter tag reflectivity and tag antenna reflectivity;Based on clutter tag reflectivity positioning and identification label;From original channel matrix, according to tag antenna reflectivity, extract and construct the target channel matrix of label;Information bits are spatially modulated by transmitting array, constellation symbol is generated and active label is determined;Using transmitting array, constellation symbol is backscattered to receiving array by active label, and combined with target channel matrix, demodulation and decoding output information bits.In the disorderly environment, reverse scattering label is accurately positioned and identified, and space modulation is integrated into reverse scattering communication, and the reliability of reverse scattering communication is improved.

The invention discloses a structure strain monitoring system and method based on a radio frequency tag and a storage medium. The monitoring system comprises a radio frequency identification tag antenna sensor, a radio frequency reader and an upper computer. The radio frequency identification tag antenna sensor monitors the strain of the monitored structure in the length direction and the width direction in a double-frequency monitoring mode; the radio frequency reader reads and writes the radio frequency identification tag antenna sensor to complete the acquisition and transmission of identity characteristic information and physical sensing signals; and the upper computer carries out comparative analysis on the physical sensing signals through a Fries transmission equation to obtain service state physical quantity information of the tag antenna and complete health state evaluation of the monitored structure. According to the method, the base effect and the Poisson's ratio effect of the metal monitored structure are considered, and the stress-strain characteristics of the monitored structure are analyzed and evaluated according to the multi-order resonant frequency drift characteristics of the tag antenna before and after deformation, so that the monitoring is more accurate.

To provide a concrete curing management device and a concrete curing management method that leave little trace on concrete structures and can also reduce construction costs.SOLUTION: A curing management device 10 for concrete C comprises a sheet-shaped RFID tag 1 that can be attached to an inner surface 101a of a formwork 100, and a reader 2 that is separate from the RFID tag 1. The RFID tag 1 is formed by overlapping in plan view a base film attached to the inner surface 101a, an antenna for the RFID tag that transmits temperature information indicating the temperature of the concrete C by radio signal, and an IC chip that has a temperature sensor and a control unit. The reader 2 receives the radio signal transmitted from the antenna for the RFID tag and acquires the temperature information. The antenna for the RFID tag has a smaller area than the base film in plan view. The IC chip has a smaller area than the antenna for the RFID tag in plan view.SELECTED DRAWING: Figure 1

The invention discloses a frequency reconfigurable RFID tag antenna, and relates to the technical field of frequency antenna design. Comprising an antenna layer, a dielectric layer, an air layer and a metal layer, the dielectric layer is arranged below the antenna layer, the air layer is arranged below the dielectric layer, and the metal layer is arranged below the air layer; the antenna layer is composed of a patch dipole upper arm, a patch dipole lower arm and a microchip, one end of the microchip is connected with the patch dipole upper arm, the other end of the microchip is connected with the patch dipole lower arm, the patch dipole upper arm comprises a first inverted-L-shaped microstrip line, a second inverted-L-shaped microstrip line, a third inverted-L-shaped microstrip line and a fourth inverted-L-shaped microstrip line, one end of the first inverted L-shaped microstrip line is electrically connected with the microchip, and the frequency reconfigurable RFID tag antenna is switched among three different frequency bands, so that the problem that the frequency of a traditional RFID tag antenna cannot be universally used between the countries is solved, and the frequency reconfigurable RFID tag antenna has the advantages of being reconfigurable in frequency, high in anti-interference capability, small in size and the like.

The utility model discloses a passive RFID tag, an upper computer is connected with a reader-writer through a serial port line, the reader-writer is connected with a reader-writer antenna through a radio frequency line, the reader-writer antenna is in wireless communication with a tag antenna of the passive RFID tag through an air interface, the passive RFID tag comprises a plurality of RFID chips, each RFID chip comprises four pins, and the pins are connected with the reader-writer antenna. Wherein two pins are connected in parallel with a tag antenna, and the other two pins are connected with a pin which is connected with an external resistor to be measured. A conventional resistance measuring scheme needs a battery to supply power or a power line, and an RFID-based testing scheme does not need a power supply and can be used in places where wiring is inconvenient, such as an assembly line and a rotating scene. A conventional passive RFID tag cannot detect external analog quantity. The passive RFID tag of the utility model is connected with the pin through the pin, and is connected with an external resistor to be detected through the pin, so as to detect the external analog quantity.

The embodiment of the utility model provides an electronic tag and a communication facility. The electronic tag is used for being installed at a tag installation hole of an installation carrier, the electronic tag comprises a bearing nail head, an electronic tag chip and an electronic tag antenna which are packaged in the bearing nail head, and a nail column integrally connected with the bearing nail head, a plurality of barbs are arranged on the peripheral side of the nail column at intervals, and the barbs are connected with the bearing nail head. The barbs are used for being in interference fit with the hole wall of the label mounting hole. According to the technical scheme of the embodiment of the invention, the reliability and convenience of electronic tag installation can be improved.

The utility model relates to an all-round nonmetal RFID tag antenna which is not only good in universality, but also good in antenna use effect, two sides of an antenna impedance adjusting ring are respectively provided with an antenna radiation arm, and the lower side of the antenna impedance adjusting ring is provided with two connecting parts which are oppositely arranged. The connecting part is composed of a first oblique line section, a second oblique line section, a third oblique line section, a first transverse line section and a second transverse line section, the second oblique line section is arranged between the first oblique line section and the third oblique line section, one end of the first transverse line section is connected with the lower end of the first oblique line section, and one end of the second transverse line section is connected with the upper end of the second oblique line section; the upper ends of the first oblique line segments in the two connecting parts are respectively connected with the lower end of the antenna impedance adjusting ring, the two first oblique line segments are distributed in a splayed shape, and the lower ends of the third oblique line segments in the two connecting parts are respectively connected with the inner side ends of the corresponding antenna radiation arms. The all-round nonmetal RFID tag antenna has the advantages of being good in universality and good in antenna using effect.

1. Name of the design product: Ultra-high frequency electronic tag antenna (C27M). 2. Use of the design product: The design product is an ultra-high frequency electronic tag antenna, used for clothing, retail, and logistics. 3. Design key points of the design product: lies in the combination of shape and pattern. 4. Picture or photo that best shows the design key points: Front view. 5. The design product is a thin product, and the left view, right view, top view, and bottom view are omitted.

The utility model discloses a high-stiffness RFID tag and a processing device. Relates to the technical field of RFID tags. Comprising a plane material, a Dry inlay and a substrate which are sequentially arranged, a PUR glue layer is arranged between the plane material and the Dry inlay, and a PUR glue layer is arranged between the Dry inlay and the substrate; the Dry inlay comprises an RFID tag antenna, a conductive adhesive and an RFID chip, and the RFID chip is connected with the RFID tag antenna through the conductive adhesive. The surface material is made of coated paper, cardboard paper or synthetic paper. The substrate is made of coated paper, cardboard paper or synthetic paper. And the thicknesses of the surface material and the substrate are 20-150 microns. The thickness of the Dry inlay ranges from 30 micrometers to 60 micrometers. The thickness of the PUR glue layer ranges from 10 micrometers to 20 micrometers. According to the utility model, the traditionally used glue (such as water glue, oil glue and the like) is abandoned, and the stiffness of the label is better than that of a thicker label made of a stiff material.

1. The name of the design product: dual-frequency tag antenna. 2. The use of the design product: for receiving and sending wireless signals. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

A method and system for calibrating a radio frequency identification (RFID) printer, the method comprising: retrieving a frequency hopping capability from an RFID module coupled to the RFID printer; performing a plurality of calibration read and write operations on the calibration RFID label at a plurality of given locations using the RFID module based on a plurality of combinations including one or more field strengths, one or more sets of RFID parameters based on the EPCC1G2 standard, and the frequency hopping capability; determining one or more optimal results of a plurality of results associated with the plurality of calibration read and write operations; determining a tag antenna orientation of the calibration RFID tag based on the plurality of results; and storing one or more optimal configuration settings in printer firmware of the RFID printer based on the tag orientation and the one or more optimal results of the plurality of results.

The invention discloses a flexible graphene RFID ear tag antenna based on informatization animal husbandry management. The flexible graphene RFID ear tag antenna comprises a substrate, a tag antenna and a radio frequency identification chip, the tag antenna comprises a symmetrical annular dipole with double radiation arms bent inwards, a feed structure based on T-shaped matching and a complete circular ring located on the inner side. The tag antenna and the radio frequency identification chip are arranged on the substrate; the symmetrical annular dipole arms with the double radiation arms bent inwards comprise an outer layer ring and an inner layer ring, and the connecting line between the center point of the spacing distance between the symmetrical annular dipole arms with the double radiation arms bent inwards and the center point of the ring is a symmetrical line. The intersection point of the symmetric line and the outer layer ring is symmetrically provided with feed structures based on T-type matching along the symmetric line to form short circuit branches, and the intersection point serves as a feed port to be connected with the radio frequency identification chip. The device can be used for informatization livestock management, and has the characteristics of miniaturization, light weight, flexibility and corrosion resistance.

The present invention discloses a method for RFID system layout in hazardous chemicals intelligent storage cabinet based on statistical analysis method. First, a simulation model of hazardous chemicals intelligent storage cabinet is established in electromagnetic simulation software according to the parameters of hazardous chemicals intelligent storage cabinet; then a simulation model of read-write antenna is established inside the simulation model of hazardous chemicals intelligent storage cabinet; then the electromagnetic field distribution in the hazardous chemicals storage cabinet including the read-write antenna is calculated; the probability density function of the electric field modulus corresponding to the read-write antenna when the read-write antenna is installed at different positions in the cabinet is calculated; the probability density function of the electric field modulus is compared with the energy activation threshold of the tag antenna chip to obtain the best installation position of the read-write antenna in the storage cabinet, and determine the optimal RFID system layout plan in the storage cabinet. The present invention obtains the optimal layout of the RFID read-write antenna in the cabinet through statistical analysis method, so that the wireless communication in the cabinet can be carried out normally, and the objects in the cabinet can be automatically counted and recorded, which reduces the cost and improves the efficiency and accuracy.

The utility model is suitable for the technical field of tool cabinets, and provides a tool cabinet system based on an RFID (Radio Frequency Identification) technology, which comprises a cabinet body, an antenna, a connecting line and an RFID card reader, the cabinet body is divided into an upper half part and a lower half part, the lower half part of the cabinet body is used for storing labeled articles, and RFID labels are attached to the side edges where the labeled articles are stored; antennae are arranged on the two sides in the lower half cabinet body; the connecting line is connected with the antenna and the RFID card reader; and the RFID card reader is arranged at the inner side of the lower half part cabinet body and is arranged at the rear. According to the utility model, the high-frequency RFID technology with the working frequency of 13.56 MHz is adopted, the RFID label has the capability of efficiently identifying label articles within 22 meters, generates a uniform read-write area to ensure stable identification, supports simultaneous reading of multiple labels, has a data write-in function to realize bidirectional transmission of information, and has a faster data transmission rate compared with a low-frequency RFID, the overall working efficiency is remarkably improved, and the cost is reduced. And global application and popularization are facilitated.

1. The name of the design product: electronic tag antenna (RD240164A-A2#). 2. The use of the design product: used in the field of RFID electronic tag antenna, to realize the communication induction antenna function of product identification, asset management, logistics and warehousing, anti-fake and anti-smuggling, etc. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: front view. 5. The design product is a thin product, and the left view, right view, top view and bottom view are omitted.

A method and system are directed to calibrating a radio frequency identification (RFID) printer, the method comprising retrieving frequency hopping capability from an RFID module coupled to the RFID printer, performing a plurality of calibration read and write operations to the calibration RFID label at a plurality of given positions using the RFID module based on a plurality of combinations comprising one or more field strengths, one or more sets of EPCC1G2 standard-based RFID parameters, and the frequency hopping capability, determining best one or more of a plurality of results associated with the plurality of calibration read and write operations, determining a tag antenna orientation of the calibration RFID label based on the plurality of results, and storing one or more optimal configuration settings in printer firmware of the RFID printer based on the tag orientation and the best one or more of the plurality of results.

This utility model belongs to the field of electronic tag technology and discloses an RFID electronic tag with an anti-tamper structure. It includes a brittle base, an antenna layer on the surface of the brittle base, a tag chip connected to the antenna layer, and multiple breakpoints with a width of 0.01m on the antenna layer. A top cover layer is provided on the surface of the antenna layer, and an adhesive layer for attaching to an object is provided at the bottom of the brittle base. The bottom of the top cover layer is coated with a fine and continuous conductive ink line to form a grid-like detection circuit. In this utility model, the detection circuit is weakly coupled to the antenna in the antenna layer, forming a parasitic capacitance. This causes a significant shift in the antenna's resonant frequency, preventing the energy emitted by the reader at its operating frequency from being effectively received by the tag antenna. This results in a sharp decrease in the tag's reading distance, or even complete unreadable data, thus achieving the anti-tamper function.

The application discloses a design method of a label antenna, which comprises sequentially arranging an upper radiation layer, a middle medium layer and a lower ground layer; at least one annular groove is formed on the upper radiation layer; an opening is formed on the annular groove to place a chip, and the annular groove is connected with the chip to form a first inductance loop; double ground columns are arranged below each annular groove between the upper radiation layer and the lower ground layer, and the double ground columns form a second inductance loop corresponding to the first inductance loop with the chip; the size of the annular groove is determined according to the capacitive reactance of a label antenna to be designed; the interval distance of the double ground columns is determined according to the inductive reactance of the label antenna to be designed; the size of the annular groove and the distance of the double ground columns are matched to achieve the best conjugate matching of the chip on each annular groove. The label antenna designed by the design method has the following advantages: first, the ground participates in radiation; second, the double inductance loops collect energy. The sensitivity of the label antenna is greatly improved by the double enhancement.