UHF RFID tag activation method and high-performance intelligent exciter

Abstract

This application relates to a UHF RFID tag activation method and a high-performance intelligent exciter, belonging to the field of radio frequency identification (RFID) technology. The method includes detecting the rising edge of a reader's transmitted signal to determine a synchronization clock signal; injecting short-duration high-power pulses during the tag's backscattering period according to the synchronization clock signal to enhance the tag's backscattering signal strength; and periodically adjusting the power value of the short-duration high-power pulses based on the tag's recognition success rate. This application effectively and reliably improves the tag activation rate.

Description

Technical Field

[0001] This application relates to the field of radio frequency identification (RFID) technology, and in particular to a UHF RFID tag activation method and a high-performance intelligent exciter. Background Technology

[0002] With the widespread application of RFID technology, UHF band RFID systems are highly favored due to their long reading distance and high-speed data transmission.

[0003] However, existing UHF RFID systems still face the following technical bottlenecks: the activation energy of passive tags relies entirely on the reader's forward link, while the maximum equivalent isotropic radiated power (EIRP) of traditional readers is limited by regulations, resulting in limited energy received by the tags. There is a ±0.5V process deviation in the chip activation voltage threshold for multiple tags, which easily leads to wake-up failures when multiple tags are woken up simultaneously. In metallic environments or multipath propagation environments, forward link losses can reach over 30dB, further reducing the tag activation success rate, thus requiring improvement. Summary of the Invention

[0004] To effectively and reliably improve the tag activation rate, this application provides a UHF RFID tag activation method and a high-performance intelligent exciter.

[0005] Firstly, this application provides a method for activating a UHF RFID tag, comprising: Detect the rising edge of the reader's transmitted signal to determine the synchronization clock signal; According to the synchronization clock signal, a short high-power pulse is injected during the tag backscattering period to enhance the tag backscattering signal strength; The power value of the short-duration high-power pulse is adjusted periodically based on the tag recognition success rate. By adopting the above technical solutions, this solution significantly improves the tag activation rate through time synchronization, power enhancement, and adaptive power adjustment technologies. Specifically, time synchronization is used to eliminate tag chip deviation, and dynamic power increment is used to overcome the static constraints of EIRP regulations, effectively improving the tag activation success rate in metallic environments. This provides strong support for the widespread application of UHF RFID technology in warehousing inventory, logistics tracking, asset management, and other fields.

[0006] Optionally, the method further includes: Periodically extract unique features from the tag's backscattered signal that distinguish it from other tags, and match enhancement power to each tag according to its unique features; The injection of a short, high-power pulse during the tag's backscattering period includes: During the corresponding tag backscattering period, the short-duration high-power pulse is injected according to the corresponding enhanced power.

[0007] By adopting the above technical solution, differentiated power enhancement is performed based on the actual received power of different tags to achieve precise and adaptive energy allocation, thereby significantly improving system efficiency and tag activation rate. Through closed-loop control of "precise perception - intelligent decision-making - dynamic execution", a dual breakthrough in energy efficiency and recognition rate is achieved under the premise of standard compatibility.

[0008] Optionally, the periodic extraction of personalized features from the tag's backscattered signal that distinguish it from other tags includes: The limiting jitter characteristics and modulation depth differences of the backscattered signal of each tag are periodically analyzed and integrated to generate personalized characteristics of the corresponding tag; among them, the limiting jitter characteristics are used to characterize the impedance switching speed of the tag chip, and the modulation depth is used to characterize the radiation efficiency of the tag antenna.

[0009] By adopting the above technical solution, tags can be distinguished directly using existing physical layer signals. Personalized features are extracted by analyzing the tag's inherent impedance switching characteristics and antenna radiation behavior. It is fully compatible with standard protocols such as EPC Gen2, without requiring any modification to the tag chip or antenna. The extraction of personalized features can be completed within <100μs, meeting the requirements for real-time power adjustment. The phase jitter feature has better stability than RSSI in multipath environments. Only a receiver signal processing module needs to be added, resulting in zero power consumption increase at the tag end.

[0010] Optionally, the method further includes: The historical response time distribution of each tag is monitored, the active periods of each tag are identified through cluster analysis, and an energy allocation plan is generated; wherein, the energy allocation plan includes the tag, the corresponding active period, and the boost power matched to the corresponding tag during the corresponding active period; The step of injecting the short-duration high-power pulse according to the corresponding enhanced power within the corresponding tag backscattering period includes: According to the synchronization clock signal, when the current time enters the active period corresponding to the target tag, a short-term high-power pulse is injected into the target tag according to the enhanced power corresponding to the target tag; wherein, the target tag is any tag.

[0011] By adopting the above technical solution, the response time distribution of each tag is monitored, and the high-frequency active periods of the tags and the energy demand intensity during the high-frequency active periods are automatically identified. The correspondence between the energy and time of each tag is generated, and a global time-energy mapping table is constructed to associate tags with energy demand at different times. When the system time (i.e., the current time) enters the active period of any tag, the corresponding enhanced power (i.e., the enhanced power matched according to personalized characteristics) is automatically recorded, and targeted power enhancement is implemented for spatially distributed tags. Compared with the static enhancement scheme, this scheme significantly improves the total energy consumption of the system, enables automatic identification and adaptation to tag behavior patterns, supports mixed scenarios of multiple tag types, effectively improves scenario adaptability, and achieves a technological leap from "indiscriminate coverage" to "precise supply" by introducing the time dimension into energy allocation decisions, providing an innovative energy-saving optimization path for dense tag scenarios.

[0012] Optionally, the method further includes: Whenever the current time enters the active period of any tag, the tag that enters the active period at the current time and whose status meets the preset triggering conditions during the active period is designated as the enabled tag; For a power-receiving tag that triggers functional matching, select a non-power-receiving tag from the non-power-receiving tags at the current time whose remaining energy is greater than a preset threshold and whose physical distance from the power-receiving tag meets the preset distance condition, and establish an association between the power-supplying tag and the power-receiving tag. During the active period of the target powered tag, a portion of the energy received by the powered tag associated with the target powered tag is transmitted to the target powered tag as relay energy through a near-field coupling link, so that the target powered tag can use the relay energy for backscatter communication.

[0013] By adopting the above technical solution, this solution proposes a near-field energy sharing method between passive RFID tags. By establishing an energy sharing channel between tags, energy collaborative sharing can be achieved, which significantly improves the system reliability in dense deployments or harsh environments. Through spatiotemporal-distance three-dimensional collaborative optimization, the energy relay efficiency is maximized while ensuring the basic working performance of the power supply tags.

[0014] Optionally, the preset triggering condition is: the power difference between the maximum and minimum boost power required by the tag during the corresponding active period is greater than a preset difference.

[0015] Optionally, the method further includes: The target area is periodically scanned using a multi-antenna array to construct a three-dimensional EMC heat map containing spatial coordinates, received power, and multipath interference index; wherein, the target area is the physical space where the tag is located. Based on the tag antenna type and service constraints, the tag installation location that maximizes EMC is calculated and output for installers to know.

[0016] By adopting the above technical solution, and by analyzing the environmental electromagnetic characteristics (such as metal density, liquid distribution, multipath interference, etc.) of the tag's predetermined installation location, the system intelligently recommends the optimal installation location for the tag, enabling it to work stably without relying on external enhancement or with minimal enhancement power, thus achieving "environmentally adaptive" tag deployment.

[0017] Secondly, this application provides a high-performance smart activator, comprising: The time synchronization module is used to detect the rising edge of the reader's transmitted signal and determine the synchronization clock signal; The power enhancement module is used to inject short-duration high-power pulses during the tag backscattering period according to the synchronization clock signal, so as to enhance the tag backscattering signal strength. An adaptive control module is used to periodically adjust the power value of the short-time high-power pulse based on the tag recognition success rate.

[0018] Thirdly, this application provides a high-performance intelligent activation device, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any of the first aspects.

[0019] Fourthly, this application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as described in any of the first aspects.

[0020] In summary, this application includes at least one of the following beneficial technical effects: In this application, the tag activation rate is significantly improved through time synchronization, power enhancement and adaptive power adjustment technologies. Specifically, time synchronization is used to eliminate tag chip deviation and dynamic power increment is used to overcome the static constraints of EIRP regulations, effectively improving the tag activation success rate in metal environments. This provides strong support for the widespread application of UHF RFID technology in warehousing inventory, logistics tracking, asset management and other fields. Furthermore, differentiated power enhancement is performed based on the actual received power of different tags to achieve precise and adaptive energy allocation, thereby significantly improving system efficiency and tag activation rate. Through closed-loop control of "precise perception - intelligent decision-making - dynamic execution", a dual breakthrough in energy efficiency and recognition rate is achieved under the premise of standard compatibility. Furthermore, a near-field energy sharing scheme between passive RFID tags is proposed. By establishing an energy sharing channel between tags, energy collaboration and sharing can be achieved, significantly improving the system reliability in dense deployments or harsh environments. Through spatiotemporal-distance three-dimensional collaborative optimization, the energy relay efficiency is maximized while ensuring the basic working performance of the power supply tags. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating the UHF RFID tag activation method disclosed in the embodiments of this application.

[0023] Figure 2 This is a structural block diagram of the high-performance intelligent textured paint disclosed in the embodiments of this application.

[0024] Explanation of reference numerals in the attached diagram: 201, Time synchronization module; 202, Power enhancement module; 203, Adaptive control module. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] This application discloses a UHF RFID tag activation method, which improves the tag activation rate through time synchronization, power enhancement, and adaptive control technologies. The execution entity of the UHF RFID tag activation method is a high-performance intelligent exciter (hereinafter referred to as the exciter). The following will describe the method in conjunction with the attached... Figure 1 The specific steps of the exciter's activation method for UHF RFID tags are described.

[0027] S101 detects the rising edge of the reader's transmitted signal to determine the synchronization clock signal.

[0028] S102, according to the synchronization clock signal, injects a short high-power pulse during the tag's backscattering period to enhance the tag's backscattering signal strength.

[0029] S103 periodically adjusts the power value of short-duration high-power pulses based on the tag recognition success rate.

[0030] In implementation, the preamble signal is extracted using a directional coupler (20dB coupling / 30dB isolation), the signal transition is quickly captured by an envelope detector (<100ns response), and the synchronization clock signal is generated by an FPGA (<50ns delay). Zero-IF demodulation ensures a synchronization accuracy of ±50ns (the theoretical limit of Δt ≤ 2μs when BW = 250kHz).

[0031] A Class C amplifier constructed from GaN HEMT (instantaneous efficiency 78% × [1 - e^(-t / 0.2ms)]) generates a 902-928MHz enhancement pulse (adjustable from 1-5ms) to inject short-duration high-power pulses. Path losses (e.g., 30dB metallic environment attenuation) are compensated using the formula: Penh = Pr + Gt + Gr - Lp + ΔPext, and harmonic suppression < -40dBc meets FCC regulations.

[0032] Where Penh is the total energy actually acquired by the tag (including reader transmit power + antenna gain - path loss + short-time high-power pulse power), Pr is the reader power, Gt and Gr are the antenna gain, Lp is the path loss, and Δpext is the short-time high-power pulse power currently injected into the GaN HEMT.

[0033] Every preset adaptive control period (e.g., 500ms), the power value of the short-time high-power pulse is iteratively optimized using the gradient descent algorithm, that is, the power value of the short-time high-power pulse is adjusted and updated using ΔPn+1 calculated by the following formula: ΔPn+1=ΔPn+α×(∂N / ∂ΔP), where: ΔPn is the dynamic power increment value at the nth iteration. When n is 1, the initial value of ΔP is obtained by mapping the forward link RSSI sampling value (±1dB accuracy). ΔPn+1 is the short-time high-power pulse power value updated after the (n+1)th iteration, used as the short-time high-power pulse power value for the next adaptive control cycle. It will be written into the dynamic power mapping table to directly control the pulse amplitude / width parameters of the GaN HEMT amplifier. α is the learning rate (α=0.05) control parameter adjustment step size; N is the number of successfully identified tags, obtained by the preset tag response rate statistics module every preset adaptive control cycle. N is used to reflect the power enhancement effect (positively correlated with the tag activation rate); ∂N / ∂ΔP is the partial derivative of the number of tags with respect to the power increment (i.e., the change in the number of tags identified per unit power change). If ∂N / ∂ΔP is positive, the power needs to be increased further; zero is optimal; and negative values ​​require power reduction (e.g., saturation).

[0034] Optionally, UHF RFID tag activation methods also include: The jitter characteristics and modulation depth differences of the backscattered signal of each tag are periodically analyzed and integrated to generate the personalized characteristics of the corresponding tag. Among them, the jitter characteristics are used to characterize the impedance switching speed of the tag chip, and the modulation depth is used to characterize the radiation efficiency of the tag antenna. Enhanced power is matched for each tag according to the personalized characteristics of each tag. The "injecting a short, high-power pulse during the tag backscattering period" in S102 includes: S1021, within the corresponding tag backscattering period, injects a short-duration high-power pulse according to the corresponding enhancement power.

[0035] In implementation, the personalized characteristics of the tag include: tag fingerprint_phase and modulation depth. Specifically, an IQ demodulator is used to capture the instantaneous limit of the tag's reflected signal (sampling rate ≥ 2MHz), and two key parameters of the phase transition are calculated: rise edge steepness (the switching time from 0° to 90°) and jitter variance (the amount of fluctuation during the phase stabilization period). These parameters are encoded into a tuple: tag fingerprint_phase = <rise edge time, jitter variance>. The amplitude extremes (Amax, Amin) of the reverse signal are measured using a peak detector, and the modulation depth is calculated as (Amax - Amin) / (Amax + Amin); where a high modulation depth indicates high tag antenna efficiency, and a low modulation depth indicates low antenna efficiency.

[0036] A pre-set database is used to store tags from historical periods. The database stores tag IDs, corresponding tag fingerprints (phase), and modulation depths. After extracting the personalized features of the tags according to the above scheme, the tag ID is determined by looking up a table. If the corresponding personalized feature does not exist in the database, the tag is considered a new tag, a tag ID is generated for the new tag, and the personalized features of the new tag are stored in the database.

[0037] Next, the intensity of the tag's reflected signal (unit: dBm) is measured using a signal strength meter (RSSI). It is assumed that the lower the intensity of the tag, the more energy it requires, i.e., the greater the required enhancement power. Enhancement power = preset tag activation power threshold - currently detected tag signal intensity; enhancement power is the power value of the short-time high-power pulse injected into the corresponding tag.

[0038] Optionally, the UHF RFID tag activation method may also include the following steps: Monitor the historical response time distribution of each tag, identify the active periods of each tag through cluster analysis, and generate an energy allocation plan table; wherein, the energy allocation plan table includes the tag, the corresponding active period, and the boost power matched to the corresponding tag during the corresponding active period; S1021 includes the following sub-steps: According to the synchronization clock signal, when the current time enters the active period corresponding to the target tag, a short-term high-power pulse is injected into the target tag according to the enhanced power corresponding to the target tag; where the target tag is any tag.

[0039] In implementation, the response time distribution of each tag is recorded through long-term monitoring (e.g., ≥7 days). Unsupervised clustering algorithms (e.g., K-means) are used to automatically identify the high-frequency active periods and energy demand intensity of the tags, generating an energy demand time function for each tag (i.e., the function of the change of enhanced power value over time during the active period). Here, the enhanced power value required at different times during the active period can be calculated based on the formula mentioned above: "Enhanced power = preset tag activation power threshold - currently detected tag signal strength". Correspondingly, the maximum enhanced power Pmax and minimum enhanced power Pmin required by the tag during the corresponding active period can also be determined from this.

[0040] Next, an energy allocation schedule is constructed, which includes all tag IDs, the active period for each tag, and the energy demand time function for the corresponding tag within the active period. Synchronization to standard time is achieved via GNSS (GPS / BeiDou) or NTP protocol, and a hardware RTC (Real-Time Clock) module maintains μs-level time accuracy. When the current time enters the active period corresponding to the target tag, the corresponding boost power is automatically loaded based on the energy demand time function. This boost power is then used as the power value for a short-duration high-power pulse, injecting a short-duration high-power pulse into the target tag to achieve targeted boosting. During this process, a programmable power amplifier adjusts the boost power according to the energy allocation schedule, and a beamforming antenna array performs targeted boosting on the target tag. Furthermore, if a tag is frequently woken up during inactive periods, a preset online learning algorithm is triggered to update the corresponding tag's active period, energy demand time function, and energy allocation schedule.

[0041] In practice, the UFID RFID tag activation method also includes the following steps: Whenever the current time enters the active period of any tag, the tag that enters the active period at the current time and whose status meets the preset triggering condition during the active period is designated as the enabled tag; wherein, the preset triggering condition is: the power difference between the maximum enhancement power and the minimum enhancement power required by the tag during the corresponding active period is greater than the preset difference. For a power-receiving tag that triggers functional matching, select a non-power-receiving tag from the non-power-receiving tags at the current time whose remaining energy is greater than a preset threshold and whose physical distance from the power-receiving tag meets the preset distance condition, and establish an association between the power-supplying tag and the power-receiving tag. During the active period of the target powered tag, a portion of the energy received by the powered tag associated with the target powered tag is transmitted to the target powered tag as relay energy through a near-field coupling link, so that the target powered tag can use the relay energy for backscatter communication.

[0042] In implementation, if the difference between the maximum enhanced power Pmax and the minimum enhanced power Pmin required by the tag during the corresponding active period is greater than a preset difference, the tag is considered an powered tag during the active period. Accordingly, this application embodiment assumes that each tag has a built-in energy storage element (such as a supercapacitor), and the remaining energy E = 1 / 2 × C × V is calculated by detecting the voltage of the tag's built-in energy storage element. 2 Where C is the supercapacitor capacitance and V is the tag voltage obtained by ADC sampling. The preset threshold can be considered as 1.5 times the minimum receiving power at which the tag chip can start working (the minimum receiving power can be obtained by gradually reducing the transmission power through the reader; the power value when the tag response rate drops to 50%).

[0043] The preset distance condition is: d_opt ± Δd; where d_opt is the optimal distance, and d_opt=√(η_max· P_donor / P_need), where η_max is the preset maximum coupling efficiency value, and η_max∈(0,1); P_donor is the available power of the functional tag (i.e., the current remaining energy of the functional tag - its own operating power consumption); P_need refers to the required power of the receiving tag. In this embodiment, P_need=the actual power that the receiving tag can generate + the maximum enhanced power of the receiving tag during its corresponding active period, maximum enhanced power Pmax; Δd is the preset tolerance deviation (e.g., 2cm).

[0044] A near-field coupling link refers to an energy channel formed by the antenna coils of the functional tag and the powered tag through mutual inductance. For example, an energy transfer channel is established via near-field communication (NFC) or capacitive coupling, with the operating frequency switched to 13.56MHz (to avoid UHF interference). Next, a variable capacitor array is loaded onto the powered tag's antenna and dynamically tuned to the powered tag's resonant frequency. The reader allocates dedicated energy transfer time slots (occupying 5%-10% of the cycle), during which data communication is paused. The powered tag can store the transferred energy using a pre-integrated micro supercapacitor for use during backscattering.

[0045] Optionally, the UHF RFID tag activation method may also include the following steps: The target area is periodically scanned using a multi-antenna array to construct a three-dimensional EMC heat map containing spatial coordinates, received power, and multipath interference index; wherein, the target area is the physical space where the tag is located. Based on the tag antenna type and service constraints, the tag installation location that maximizes EMC is calculated and output for installers to know.

[0046] During implementation, an 8-channel phased array antenna is used periodically to scan the target area (grid accuracy ≤10cm), simultaneously collecting parameters such as RSSI, phase consistency, and multipath delay at each backup installation point within the target space (which can be predefined manually or automatically selected from locations without specific physical structures). A three-dimensional electromagnetic compatibility (EMC) heatmap is generated using Gaussian process regression (GPR); the kernel function of GPR is: Spatial correlation = Base signal strength × exp(-distance). 2 / smoothing coefficient) + measurement error; where the basic signal strength represents the basic signal level of the target area, exp(-distance) 2 The smoothing coefficient is used to describe the degree of signal attenuation with distance, where the distance is the spacing between each backup installation point in the target space, and the measurement error refers to the correction item that takes into account the inaccuracy of the equipment measurement.

[0047] The objective function is optimized using a hybrid approach of genetic algorithm and gradient descent. The new position where the total optimization objective value is minimized is then used as the label position to maximize EMC. The objective function is expressed as: Total Optimization Objective = a × P 2 +b×D; where a and b are preset weighting coefficients, P is the external enhancement power required by the tag at its current position (i.e., the enhancement power obtained by matching above), and P=max(0,P-P'), where P' is the power actually received by the tag at its current position, and D refers to the spatial distance between the backup installation point and the tag's current position (i.e., its original position).

[0048] This application also discloses a high-performance smart activator. (Refer to...) Figure 2 ,include: The time synchronization module 201 is used to detect the rising edge of the reader's transmitted signal and determine the synchronization clock signal; The power enhancement module 202 is used to inject short-duration high-power pulses during the tag backscattering period according to the synchronization clock signal, so as to enhance the tag backscattering signal strength. The adaptive control module 203 is used to periodically adjust the power value of the short-time high-power pulse based on the tag recognition success rate.

[0049] Optionally, a personalized matching module is also included, which periodically extracts personalized features from the tag backscattered signal that distinguish it from other tags, and matches the enhanced power to each tag according to the personalized features of each tag.

[0050] The power enhancement module 202 is also used to inject the short-time high-power pulse according to the corresponding enhancement power during the backscattering period of the corresponding tag.

[0051] Optionally, the personalized matching module is also used to periodically analyze the limiting jitter characteristics and modulation depth differences of the backscattered signal of each tag, and integrate them to generate the personalized characteristics of the corresponding tag; wherein, the limiting jitter characteristics are used to characterize the impedance switching speed of the tag chip, and the modulation depth is used to characterize the radiation efficiency of the tag antenna.

[0052] Optionally, an energy allocation module is also included, which is used to monitor the historical response time distribution of each tag, identify the active periods of each tag through cluster analysis, and generate an energy allocation plan table; wherein, the energy allocation plan table includes tags, corresponding active periods, and the boost power matched to the corresponding tag during the corresponding active period.

[0053] The power enhancement module 202 is also used to inject a short-time high-power pulse into the target tag according to the enhancement power corresponding to the target tag when the current time enters the active period corresponding to the target tag, based on the synchronization clock signal; wherein the target tag is any tag.

[0054] Optionally, it also includes an energy sharing module, used to select, whenever the current time enters the active period of any tag, tags that enter the active period at the current time and whose status meets the preset triggering conditions during the active period as powered tags; it is also used to select, for powered tags that have triggered functional matching, non-powered tags with remaining energy greater than a preset threshold and whose physical distance from the powered tag meets the preset distance condition from the non-powered tags at the current time as powered tags, and establish an association between the powered tags and the powered tags; it is also used to send a portion of the energy received by the powered tag associated with the target powered tag as relay energy to the target powered tag through a near-field coupling link during the active period of the target powered tag, so that the target powered tag can use the relay energy for backscatter communication.

[0055] Optionally, it also includes a tag location deployment module, which is used to periodically scan the target area through a multi-antenna array to construct an EMC three-dimensional heat map containing spatial coordinates, received power and multipath interference index; wherein the target area is the physical space where the tag is located; and is also used to solve and output the tag installation position that maximizes EMC according to the tag antenna type and service constraints, so that the installers can know it.

[0056] This application also discloses a high-performance smart activation device, which includes a memory and a processor. The memory stores a computer program that can be loaded by the processor and executed as described above for activating a UHF RFID tag.

[0057] This application also discloses a computer-readable storage medium that stores a computer program that can be loaded by a processor and executed as described above for the UHF RFID tag activation method. The computer-readable storage medium includes, for example, various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0058] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0059] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit the scope of protection of the application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

Claims

1. A method for activating a UHF RFID tag, characterized in that, include: Detect the rising edge of the reader's transmitted signal to determine the synchronization clock signal; According to the synchronization clock signal, a short high-power pulse is injected during the tag backscattering period to enhance the tag backscattering signal strength; The power value of the short-duration high-power pulse is adjusted periodically based on the tag recognition success rate.

2. The UHF RFID tag activation method according to claim 1, characterized in that, The method further includes: Periodically extract unique features from the tag's backscattered signal that distinguish it from other tags, and match enhancement power to each tag according to its unique features; The injection of a short, high-power pulse during the tag's backscattering period includes: During the corresponding tag backscattering period, the short-duration high-power pulse is injected according to the corresponding enhanced power.

3. The UHF RFID tag activation method according to claim 2, characterized in that, The periodic extraction of personalized features that distinguish the tags from other tags from the tag's backscattered signal includes: The limiting jitter characteristics and modulation depth differences of the backscattered signal of each tag are periodically analyzed and integrated to generate personalized characteristics of the corresponding tag; among them, the limiting jitter characteristics are used to characterize the impedance switching speed of the tag chip, and the modulation depth is used to characterize the radiation efficiency of the tag antenna.

4. The UHF RFID tag activation method according to claim 2, characterized in that, The method further includes: The historical response time distribution of each tag is monitored, the active periods of each tag are identified through cluster analysis, and an energy allocation plan is generated; wherein, the energy allocation plan includes the tag, the corresponding active period, and the boost power matched to the corresponding tag during the corresponding active period; The step of injecting the short-duration high-power pulse according to the corresponding enhanced power within the corresponding tag backscattering period includes: According to the synchronization clock signal, when the current time enters the active period corresponding to the target tag, a short-term high-power pulse is injected into the target tag according to the enhanced power corresponding to the target tag; wherein, the target tag is any tag.

5. The UHF RFID tag activation method according to claim 4, characterized in that, The method further includes: Whenever the current time enters the active period of any tag, the tag that enters the active period at the current time and whose status meets the preset triggering conditions during the active period is designated as the enabled tag; For a power-receiving tag that triggers functional matching, select a non-power-receiving tag from the non-power-receiving tags at the current time whose remaining energy is greater than a preset threshold and whose physical distance from the power-receiving tag meets the preset distance condition, and establish an association between the power-supplying tag and the power-receiving tag. During the active period of the target powered tag, a portion of the energy received by the powered tag associated with the target powered tag is transmitted to the target powered tag as relay energy through a near-field coupling link, so that the target powered tag can use the relay energy for backscatter communication.

6. The UHF RFID tag activation method according to claim 5, characterized in that, The preset triggering condition is: the power difference between the maximum and minimum boost power required by the tag during the corresponding active period is greater than a preset difference.

7. The UHF RFID tag activation method according to claim 1, characterized in that, The method further includes: The target area is periodically scanned using a multi-antenna array to construct a three-dimensional EMC heat map containing spatial coordinates, received power, and multipath interference index; wherein, the target area is the physical space where the tag is located. Based on the tag antenna type and service constraints, the tag installation location that maximizes EMC is calculated and output for installers to know.

8. A high-performance intelligent activator, characterized in that, include: The time synchronization module (201) is used to detect the rising edge of the reader's transmitted signal and determine the synchronization clock signal; The power enhancement module (202) is used to inject short-duration high-power pulses during the tag backscattering period according to the synchronization clock signal to enhance the tag backscattering signal strength; An adaptive control module (203) is used to periodically adjust the power value of the short-time high-power pulse based on the tag recognition success rate.

9. A high-performance intelligent activation device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer program is stored that can be loaded by a processor and executed as described in any one of claims 1 to 7.

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