987 results about "Radio-frequency identification" patented technology

The invention relates to the technical field of radio frequency identification, in particular to a customer commodity interaction behavior identification method and system based on UHF RFID. The method comprises the steps of obtaining a multivariate data set of activated scattering of RFID tags on commodities in a reading area of a retail scene, obtaining a state evaluation index according to power loss of a transmission signal so as to obtain abnormal probability distribution of each RFID tag, and the abnormal probability distribution is used for judging dynamic commodities in the retail scene and obtaining the taking times of the dynamic commodities. The UHF RFID work cards worn by the employees are introduced to confirm the interaction implementers, and the action duration, the action occurrence time sequence and the action type of each interaction action of the customer are determined, so that the interaction behavior type of the customer and the commodity is judged. According to the method, the problems that real interaction behaviors are difficult to distinguish in a complex electromagnetic environment and the anti-interference capability is weak in the prior art can be effectively solved, and reliable technical support is provided for customer behavior analysis, commodity display optimization and intelligent marketing in a retail scene.

The invention discloses a horizontal five-axis turning and milling composite center with a self-adaptive matching system. The horizontal five-axis turning and milling composite center comprises a tool turret, a boring tool mechanism, a tool changing area and a control system. A radio frequency identification reading device is arranged in a tool changing area of the tool turret and the boring tool mechanism, and an RFID chip tag is attached to the outer surface of each tool and used for storing tool serial numbers, specifications and length compensation parameters. And the control system realizes self-adaptive matching and sequential error correction of the cutter and the working procedure through radio frequency identification. The tool changing area is provided with a visual monitoring assembly which comprises a plurality of sets of industrial cameras, an adjustable light source and a structured light stripe illumination module and is used for detecting the clamping posture, the abrasion state and the type of a tool. The system has self-learning and digital twinning simulation functions, and can simulate the motion trail of the cutter and predict the interference risk before the cutter is changed. According to the method, integrated control over automatic tool recognition, posture correction, abrasion detection and path prediction is achieved, and the tool changing precision, the operation stability and the automation level of the horizontal five-axis turning and milling composite center are remarkably improved.

The invention discloses a data reading method and system based on an RFID reader-writer, particularly relates to the technical field of radio frequency identification data acquisition, and is used for solving the problem that the communication reliability of an existing RFID system is reduced due to carrier frequency deviation and multipath interference in a high-speed mobile environment. A phase change characteristic and an error rate index are obtained through double-antenna receiving signal analysis, when the error rate exceeds a limit, spatial correlation and error rate distribution difference are jointly analyzed to determine a multipath interference level, and meanwhile, a relative motion state is detected and judged through a phase track curvature characteristic. And dynamically selecting an optimal modulation coding mode to read data again according to the calculated motion speed estimated value and the interference level, thereby realizing the optimal balance between the communication rate and the reliability in the mobile environment.

The invention is applicable to the technical field of monitoring, and provides a smart monitoring method and system. The smart monitoring method includes the steps of receiving the identity information of a target object, which wears a target electronic label and is in a monitoring area, recording the time when the target object in each position, calculating the distance between the target object and a radio frequency identification reader, determining the geographical position of the radio frequency identification reader, calculating geographical position of the target object in each position according to the distance and the geographical position of the radio frequency identification reader, calculating the to-fro moving frequency of the target object according to the time of the target object in each position and geographical position of the target object in each position, and determining whether the target object is under a wandering state according to the frequency. According to the method, whether a target object wanders in a monitoring area can directly be obtained from received information, thereby facilitating monitoring of the target object and improving user experience.

The invention relates to a non-inductive security monitoring method and system based on a radio frequency identification technology, and relates to the technical field of data processing. The method mainly comprises the following steps: acquiring original radio frequency data and original video data of a target area in a current time period; respectively carrying out feature extraction on the original radio frequency data and the original video data to obtain a radio frequency feature vector and a visual feature vector; performing feature vector fusion on the radio frequency feature vector and the visual feature vector to obtain a fusion feature vector; inputting the fusion feature vector of the current time period and the fusion feature vectors of N time periods before the current time period into a behavior classification model to obtain a behavior prediction result; if the behavior prediction result is limb movement, determining a limb recognition result corresponding to the current time period according to a limb recognition model; and if the behavior prediction result is gesture motion, determining a gesture recognition result corresponding to the current time period according to a gesture recognition model.

The invention discloses a tray detecting and positioning method based on radio frequency identification and sensor fusion, which comprises the following steps: deploying an RFID tag matrix and multiple types of sensors on a tray to realize data space-time synchronous acquisition; fusing multi-modal data by using an improved D-S evidence theory and the like, and adaptively adjusting the importance of each modal through a dynamic weight factor; a three-dimensional space and attitude constraint equation is constructed, a Levenberg-Marquardt algorithm is used for solving, the accurate coordinates and attitude of the tray are output, and accurate detection and positioning are achieved. According to the invention, through RFID and multi-sensor data fusion and innovative algorithm processing, all-directional sensing of static and dynamic information of the tray is realized; the system can accurately position trays, adapt to a complex environment, effectively process abnormal conditions, optimize energy consumption, improve multi-tray cooperation efficiency, and improve logistics management intelligent level and operation efficiency.

A communication system for inventory management via wireless monitoring comprises radio frequency identification (RFID) tags configured to operate in a frequency band that is unlicensed in a first geographic region and is licensed in a second geographic region. The communication system also comprises a RFID reader designed according to operational parameters of the first geographic region. The RFID reader is configured to read, in the second geographic region, data from the RFID tags via radio frequency (RF) signal transmissions in the frequency band at a power level that exceeds the operational parameters of the first geographic region. The RFID reader comprises a RF circuit, an antenna, and a controller. The controller is configured to program the RF circuit with second operational parameters, which cause the RFID reader to operate outside of requirements for operation in the unlicensed frequency spectrum in the first geographic region as defined by the operational parameters.

The invention belongs to the technical field of radio frequency identification, and particularly relates to an unmanned aerial vehicle radio frequency fingerprint identification method for different signal-to-noise ratios based on a time-frequency graph. The invention provides a radio frequency fingerprint identification method for different signal-to-noise ratios based on a time-frequency graph and a YOLOV8 image identification technology on the basis of a traditional unmanned aerial vehicle radio frequency signal fingerprint identification technology, and the method mainly comprises the steps: constructing a new training data structure, specifically, converting an IQ signal into the time-frequency graph, and carrying out the recognition of the time-frequency graph and the YOLOV8 image identification technology. And then performing arrangement according to the unmanned aerial vehicle type (J), the signal bandwidth (B), the signal frequency band (F) and the signal-to-noise ratio (R) to obtain a structured data set, and performing identification by using an improved YOLOV8 model. Compared with the prior art, the method further improves the accuracy and speed of unmanned aerial vehicle identification, and is a scheme for identifying the model of the unmanned aerial vehicle on the hardware level without information matching. According to the method, high sensitivity of the model to a low-signal-to-noise-ratio signal is kept, and meanwhile, a large amount of misrecognition caused by low confidence is effectively inhibited.

The invention provides an archive management model based on digital twinning, and relates to the technical field of archive management. The archive management model based on digital twinning comprises a physical layer, the physical layer is connected with a data layer, the data layer is connected with a digital twinning layer, and the digital twinning layer is connected with an intelligent control layer. According to the technology, an archive management model is constructed by utilizing digital twinning, a virtual mirror image of an entity storehouse is created through a building information model and an internet of things data stream, millimeter-level precision three-dimensional modeling is realized, archive management is more accurate and intuitive, a weight sensor can monitor the weight of the archive in real time, the deviation can be compared during returning, mistakes and omissions are avoided, and the integrity of the archive is guaranteed; the intelligent control layer generates a three-dimensional navigation path, combines a virtual reality terminal, simplifies the archive searching and returning process, reduces manual errors, tracks an administrator and identifies archives in real time through an ultra wide band positioning module and a radio frequency identification reader-writer, optimizes borrowing and returning efficiency, achieves intelligent management of an archive repository, reduces cost and improves efficiency.

The invention discloses a piece placing sequence mistake proofing device which comprises a multi-dimensional sensing module, an intelligent control module, a reconfigurable positioning module, an execution intervention module, a block chain tracing module and a man-machine interaction module, and all the modules communicate through an industrial Ethernet. The multi-dimensional sensing module and the intelligent control module adopt a time-sensitive network protocol to guarantee the certainty of data transmission, the multi-dimensional sensing module integrates an AI vision assembly, an ultrahigh frequency radio frequency identification read-write unit and a polarized light detection assembly, and parallel acquisition and cross validation of cutting piece multi-dimensional information are realized through a time sequence synchronous triggering mechanism. According to the method, a full-dimensional recognition system can be constructed through cooperation of multi-modal sensing fusion and an intelligent algorithm to avoid a single detection blind area, multi-variety production requirements are adapted by relying on AI incremental learning and rapid remodeling design, non-tampering tracing of quality data is realized in combination with a block chain technology, and the method is suitable for mass production. And meanwhile, reliable operation of the system is guaranteed through redundancy control and emergency design.

Systems and techniques for wireless communication are provided. Radio frequency identification (RFID) observations may be obtained based on an excitation signal and a plurality of backscatter signals from a plurality of RFID tags. Each backscatter signal may indicate an identifier of a respective RFID tag uniquely associated with a particular item of the plurality of items. The expected background noise information indicative of a subset of the plurality of items for the RFID observation may be determined based on comparing the location of the wireless communication device to the item placement information for the plurality of items. The RFID observations may be filtered using expected background noise information to exclude information associated with a subset of the plurality of items. A shopping basket content estimate may be determined from the filtered RFID observations, wherein the shopping basket content estimate is indicative of one or more collected items of the plurality of items.

The invention relates to the technical field of radio frequency identification and intelligent logistics management, in particular to a multifunctional cargo tracking method based on RFID, which comprises the following steps: step 1, cargo binding and data synchronous acquisition: acquiring cargo state parameters through an RFID tag integrated with multiple sensors, and when a reader-writer transmits a query instruction, sending a query instruction to the reader-writer; synchronously acquiring a temperature value, a humidity value and a three-axis vibration acceleration, and packaging the temperature value, the humidity value and the three-axis vibration acceleration with a cargo identity code and a timestamp into a combined data unit; 2, dynamic environment interference suppression; step 3, mobile scene routing optimization: acquiring the moving speed of the carrier in real time, dynamically calculating an optimal query interval by combining with an environment interference coefficient, and transmitting a query instruction according to an interval period; and 4, multi-dimensional state fusion verification is carried out. Through innovative measures of multi-sensor integration, dynamic environment compensation, mobile scene optimization and the like, the accuracy, stability and intelligent level of cargo tracking are effectively improved.

The invention discloses an RFID reader-writer-based electronic tag position sensing and tracking method and system, particularly relates to the technical field of radio frequency identification and positioning, and is used for solving the problems of asynchronous signal acquisition of multiple reader-writers and insufficient positioning precision in a dynamic environment caused by an anti-collision mechanism of an existing RFID system. A label response signal is obtained through a multi-reader-writer synchronous triggering and signal receiving mechanism, a channel coherence time parameter is estimated, then symbolization processing and complexity analysis are carried out on the parameter to identify a label motion state, and meanwhile the measurement reliability is evaluated by analyzing the trend deviation degree of the channel parameter and the signal strength. And finally, correcting a distance measurement value based on the motion state and a reliability evaluation result, and calculating a space coordinate by adopting a multilateral positioning algorithm, thereby realizing accurate and stable positioning of the electronic tag in a dynamic high-density scene.

Radio-frequency identification (RFID) systems use readers to query and locate passive RFID tags in stores, warehouses, and other environments. A signal from the reader powers up the tag, which modulates and backscatters the signal toward the reader. The reader or an appliance coupled to the reader can estimate the tag's position based on the angle of arrival (AOA) of the backscattered signal. In some situations, AOA measurements by different readers may yield different position estimates for the same tag. If these position estimates are close enough to each other (e.g., within the expected imprecision or error radius), they can be averaged to improve precision. If not, the appliance can measure the variance or another measure of dispersion for each reader's position estimates, then pick the reader with the lowest dispersion as the preferred or best sensor for locating that tag, improving precision and reducing processing time.

The invention discloses an RFID digital information read-write tag security control method and system, and relates to the technical field of Internet of Things information security, and the method comprises the steps: receiving a user authentication request, generating a communication random number in combination with a trusted tag archive back-end program, and obtaining an authentication task package after common packaging; the authentication task package is sent to an RFID digital information read-write tag, a reconstructed stable key and real-time environment parameters are obtained, and a tag encryption response voucher is obtained by combining cryptographic signature calculation; according to the label encryption response voucher, cryptographic verification of a back-end program is executed, and credible physical state data is identified; and based on the credible physical state data, executing business strategy verification of a back-end program, obtaining an authorization decision result, and performing dynamic data reading and writing. According to the method, the physical identity of the tag and the real-time environment parameters are bound on the cryptographic level, so that the authenticity and non-tampering property of the physical state data in subsequent verification are ensured.

A radio-frequency identification (RFID) system includes RFID tags arranged in a plurality of separate rows, a RFID reader, and a computer system including a processor, a non-transitory computer readable medium, and one or more applications stored in the non-transitory computer readable medium. The one or more applications, when executed by the processor, initiate by the RFID reader a row scan, and modulate, using a beamforming control module, a configuration of a radiation beam. In addition, the one or more applications, when executed by the processor, modulate by a power control module an emission power of the reader antenna during the performance of the row scan, and detect by the RFID reader one or more of the RFID tags positioned along a row.

An adaptive inventory management system for use in a materials handling facility storing a plurality of items that are each associated with a Radio Frequency Identification (RFID) tag. The management system including a global inventory database subsystem, a RFID interrogator subsystem and a multi-frequency interrogator subsystem for scanning RFID tags within a defined internal volume of a vehicle. The management system being selectively configured to include an occupancy detection system.

The invention relates to the technical field of coffee cold extraction and concentration equipment, in particular to continuous coffee cold extraction and concentration equipment based on intelligent monitoring. The system comprises an intelligent preprocessing unit, an intelligent cold extraction control unit, a quality monitoring and intercepting unit and a concentration presetting unit, the intelligent preprocessing unit collects coffee bean parameters and moisture content data through the radio frequency identification technology, and the intelligent cold extraction control unit accurately controls cavity switching through a servo motor; the optimal extraction environment is automatically matched for coffee powder with different characteristics, parameters such as temperature, pressure and concentration in the processing process are analyzed in real time based on a machine learning algorithm, and extraction process parameters are dynamically adjusted. And the quality monitoring and intercepting unit performs multi-dimensional quality evaluation on the extraction liquid to ensure the stable quality of the final product. According to the invention, a whole-process intelligent control system from raw material processing to finished product output is constructed, and the quality consistency and the production efficiency of the coffee cold extraction concentrated product are remarkably improved.

An adaptive inventory management system for use in a materials handling facility storing a plurality of items that are each associated with a Radio Frequency Identification (RFID) tag. The management system including a global inventory database subsystem and a RFID interrogator subsystem comprising at least one RFID interrogators that are each configured to read the unique identifier of the RFID tag associated with each of the plurality of items that are within a defined boundary of at least one scan zone generated by the plurality of antenna that are coupled to the at least one RFID interrogator and to communicate the unique identifier of the each scanned RFID tag identified within each scan zone to the global inventory database subsystem. The management system being selectively configured to effect user desired levels of fidelity and / or resolution with respect to the generated unique identifier of each scanned RFID tag within a defined space of the materials handling facility.

When a radio-frequency identification (RFID) tag reader queries an RFID tag, the reader or an appliance coupled to the reader derives a channel estimate from the tag's reply to the reader's query. The channel estimate represents the communications channel between the reader and that tag—or more precisely between the reader and the tag's location. This channel estimate acts as a fingerprint or signature for the communications channel between the reader and the tag's location. If the tag's environment is relatively static, then the channel estimate should be relatively stable, even if the tag is moved. The reader or appliance creates a library of tag locations indexed by channel estimate for each tag within range of the reader. When the reader receives a reply from a tag at an unknown location, the reader or appliance computes the corresponding channel estimate and uses that channel estimate to look up the closest location in the library of tag locations.

The invention discloses an archive room full life cycle management system based on a radio frequency identification technology, and relates to the field of archive management, the optimal weight vector of each reader-writer antenna array is obtained through a minimum mean square error algorithm, the transmitting phase and amplitude of each node signal are accurately adjusted according to the optimal weight vector, and in the spatial dimension, the optimal weight vector of each reader-writer antenna array is obtained. Through cooperative control and spatial filtering of beams transmitted by a plurality of distributed reader-writer nodes, beam main lobe energy is converged to a target passive RFID electronic tag, a radiation zero point is formed in the direction of a metal file cabinet, meanwhile, spatial power superposition and directional interference suppression are realized, multipath reflection interference in a metal environment is reduced, and the reliability of the metal file cabinet is improved. The signal-to-noise ratio of the label is fundamentally improved, the response rate of the label is ensured to be improved to 98% or above through a dynamic frequency modulation mechanism, and the problem of signal multipath reflection caused by a metal file cabinet is effectively solved.

The invention discloses a metamaterial RFID (Radio Frequency Identification) anti-interference antenna structure for a severe environment and a manufacturing method of the metamaterial RFID anti-interference antenna structure. The middle layer of a substrate of the antenna structure is made of corrosion-resistant polyether-ether-ketone resin doped carbon nanotubes; the upper-layer metal patch of the electromagnetic band gap unit array and the lower-layer metal layer of the annular gap are respectively attached to the upper surface and the lower surface of the middle layer of the substrate; and a self-adaptive impedance matching module is arranged at the joint of the equipment antenna and the feeder line. And each unit in the electromagnetic band gap unit array vertically penetrates through the substrate through a metalized via hole and is connected with the upper-layer metal patch and the lower-layer metal grounding layer of the substrate to form an LC resonance unit. The skin effect of eddy current on the metal surface can be counteracted through the reverse induction current, the loss of energy on the metal surface is greatly reduced, and the radiation efficiency of the metal surface is remarkably improved. In a complex electromagnetic environment, signals can be radiated and received more efficiently, the communication stability and reliability of an RFID system are effectively enhanced, and the probability of signal loss and error codes is reduced.

The invention belongs to the technical field of radio frequency identification, and particularly discloses a multi-antenna diversity reception high-frequency RFID signal processing system and method, and the system comprises a multi-antenna array, a multi-channel amplification notch module, a high-frequency-to-intermediate-frequency module, an MRC processing module, an AGC circuit, and a demodulation module which are sequentially connected according to the signal flow direction. Spatial diversity reception is realized through a multi-antenna array, low-noise amplification and self-interference suppression are synchronously completed by the multi-channel amplification trap wave module, amplitude weighting and phase compensation combination of multi-channel intermediate frequency signals are realized by the MRC processing module after frequency spectrum shifting of the high-frequency-to-intermediate frequency module, and the multi-channel high-frequency-to-intermediate-frequency signal is obtained. Power is stabilized through the AGC circuit, signal amplification and analog-to-digital conversion are completed through the demodulation module, and finally pure digital baseband signals are output. Through the technical means, the anti-interference capability and the receiving sensitivity of the high-frequency RFID receiver in a complex environment can be effectively improved, and the requirement for long-distance and high-reliability electronic tag reading is met.

A Radio Frequency Identification Device (RFID) tag capable of withstanding electrical stress from induction sealing arrangement and provide shielding against the metallic seal required for induction sealing includes an antenna coil partitioned into a main coil and an auxiliary coil. Both the coils are collocated on two separate overlapping or non-overlapping regions of a dielectric substrate without any galvanic connection therebetween. The main coil is operatively connected with semiconductor chip on the dielectric substrate for necessary RFID activities, while the auxiliary coil operates as a resonator tuned to a certain resonating frequency that enables the auxiliary coil to act as a virtual open circuit to induction sealing frequency and help the semiconductor chip to withstand the electrical stress from induction sealing. The auxiliary coil carries a current during interrogation of the tag by an RFID Reader which provides shielding against eddy currents on the metal seal for induction sealing.

Methods for producing and validating RFID transponders (e.g., ISO 11784 / 11785 compliant transponders) with identification number authentication capabilities. A signature indicator and a partial-signature trailer are introduced to the ISO telegram. An encrypted signature or partial signature is introduced to the internal memory of ISO compliant transponders. The encrypted signature can prevent fraudulent duplications of ISO 11784 / 11785 transponders by allowing users to securely validate the transponders' authenticity.

An adaptive inventory management system for use in a materials handling facility storing a plurality of items that are each associated with a Radio Frequency Identification (RFID) tag. The management system including a global inventory database subsystem and a RFID interrogator subsystem that are configured to read the unique identifier of the RFID tag associated with each of the plurality of items and to communicate the unique identifier of each scanned RFID tag identified within each scan zone of the respective RFID interrogator to the global inventory database subsystem. The management system being selectively configured to effect user desired levels of fidelity and / or resolution with respect to the generated unique identifier of each scanned RFID tag within a defined space of the materials handling facility.

An apparatus, including a vehicle computer located at a vehicle which is an electric vehicle or hybrid vehicle; battery recharging equipment which includes a plug-in recharging system, an electric road inductive charging system, or an electric road electrified contact charging system, and a radio frequency identification (RFID) reader. The vehicle computer processes information and determines a battery charge level or a battery charge state for a battery of the vehicle. The RFID reader obtains information from a battery recharging system located at a battery recharging facility. The vehicle computer receives an activity report regarding the recharging of the battery by the battery recharging facility and displays information contained in the activity report. The activity report or information contained in the activity report is stored in a distributed ledger and blockchain technology system.

The invention discloses a surface damage positioning method suitable for an ultrahigh-strength concrete wind power mixing tower. The surface damage positioning method comprises the steps that benchmark identification pieces containing radio frequency chips and visual recognition patterns are annularly arranged at the preset height of a tower at intervals; the inspection equipment carries a millimeter wave radar, a binocular vision camera and a radio frequency identification module to spirally cruise along the tower drum, and synchronously obtains initial coordinates, real-time image streams and radar reflection signals; correcting the image flow and extracting features, establishing pixel and physical space mapping in combination with the size of the reference identifier, and generating an initial three-dimensional grid model; radar signals are analyzed, mutation feature points are extracted, and a suspected damage area is preliminarily positioned in combination with a three-dimensional grid; controlling equipment to perform fixed-point shooting, extracting damage contour features and calculating actual geometric parameters; the parameters and the physical coordinates are imported into a cylindrical coordinate system conversion model, the damage height, the circumferential angle and the distance between the damage height and the nearest reference identification piece are output, and accurate positioning is achieved; and reliable data support is provided for operation and maintenance of the wind power mixed tower.

The invention discloses a radio frequency identification method and device. The method comprises the following steps: an RFID reader sends a first signal to an RFID tag; the RFID reader receives a second signal sent by the RFID tag through at least three receiving antennas; and the RFID reader determines the position of the RFID tag based on the second signals received by the at least three receiving antennas. Wherein the second signal comprises a plurality of sub-signals, each sub-signal in the plurality of sub-signals is a frequency shift signal of the first signal, and the center frequencies of the plurality of sub-signals are different. The RFID tag is positioned based on the second signals received by the at least three receiving antennas, additional equipment such as a mobile robot is not needed, the positioning scheme is simple, and the cost is lower. The second signal comprises a plurality of frequency shift signals with different center frequencies, on one hand, same-frequency interference can be avoided, on the other hand, a plurality of sub-signals can be synthesized into a broadband signal, the bandwidth of the signal for positioning is larger, and the positioning precision is improved.