CN116992910B

CN116992910B - RFID reader-writer capable of dynamic power control

Info

Publication number: CN116992910B
Application number: CN202311261176.8A
Authority: CN
Inventors: 熊立志; 刘湘贵
Original assignee: Shenzhen Nation Rfid Technology Co ltd
Current assignee: Shenzhen Nation Rfid Technology Co ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-12-08
Anticipated expiration: 2043-09-27
Also published as: CN116992910A

Abstract

The invention relates to the technical field of RFID systems, and discloses an RFID reader capable of realizing dynamic power control, wherein the system comprises an RFID system signal emission control module, an RFID system signal emission time sequence and emission power distribution module, an RFID system emission signal power adjustment module and an RFID system identification state space position prompt module; the method comprises the steps of increasing the flexibility and application scene of the initial transmitting power dynamic adjustment of the RFID reader-writer and the signal transmitting power adjustment of the RFID reader-writer according to the time interval by setting the initial power parameter of the signal transmission of the RFID reader-writer and the time interval parameter of the interval; and generating signal transmission time sequence data of the RFID reader-writer by utilizing system time point parameters of the RFID reader-writer starting operation and time period parameters of the signal transmission interval of the RFID reader-writer, realizing the scientific and dynamic adjustment of the signal transmission power of the RFID reader-writer according to the time sequence, realizing the flexible and dynamic increase of the signal transmission power of the RFID reader-writer, and improving the identification precision of an RFID system.

Description

RFID reader-writer capable of dynamic power control

Technical Field

The invention relates to the technical field of RFID systems, in particular to an RFID reader capable of controlling dynamic power.

Background

The RFID reader-writer system, namely the radio frequency identification system, is a non-contact automatic identification system, automatically identifies a target object through radio frequency wireless signals, acquires related data, and consists of an electronic tag, a reader-writer and a computer network. The radio frequency identification system marks objects by using an electronic tag, the electronic tag exchanges data with a reader-writer through radio waves, the reader-writer can transmit a read-write command of a host to the electronic tag and then transmit data returned by the electronic tag to the host, and a data exchange and management system of the host is responsible for completing storage, management and control of data information of the electronic tag, and the basic working principle of the RFID system is as follows: the reader-writer sends radio frequency signals with specific frequency through the transmitting antenna, and when the electronic tag enters an effective working area, induced current is generated, so that energy is activated, and the electronic tag transmits self-coded information through the built-in antenna; the receiving antenna of the reader-writer receives the modulation signal sent from the tag, and the modulation signal is transmitted to the signal processing module of the reader-writer through the modulator of the antenna, and the effective information is transmitted to the background host system for relevant processing after demodulation and decoding; the host system recognizes the identity of the tag according to the logic operation, performs corresponding processing and control for different settings, and finally sends out signals to control the reader to complete different read-write operations. RFID systems can be generally classified into inductive coupling (magnetic coupling) systems and electromagnetic backscatter coupling (electromagnetic coupling) systems from the viewpoint of communication between an electronic tag and a reader/writer and an energy induction manner. The inductive coupling system realizes coupling through a space high-frequency alternating magnetic field according to an electromagnetic induction law; electromagnetic backscattering coupling, namely a radar principle model, reflects emitted electromagnetic waves after hitting a target and simultaneously carries back target information according to the space propagation rule of the electromagnetic waves; the inductive coupling mode is generally suitable for a close-range RFID system working at medium and low frequencies; the electromagnetic back scattering coupling mode is generally suitable for a long-distance RFID reader-writer system with high frequency and microwave working frequency; in addition, the reflected signal of the RFID tag is obviously affected by the environment, the radio frequency signal is emitted according to fixed power in the running process of the existing RFID reader-writer system, the strength of the reflected signal of the RFID tag is easily affected by the surrounding environment because the RFID tag is a passive device, and the identification efficiency of the RFID reader-writer system is low or the RFID reader-writer system cannot be accurately identified because the distance between the tag and the reader-writer, the reading power, the signal interference and the operation specification are all affected.

The Chinese patent grant publication number is CN110728338B, which discloses an RFID reader system and a power calibration method, wherein the RFID reader system outputs according to rated power by adopting the following method; step 1, obtaining output voltage of a power detector, and calculating actual output power value of the RFID reader-writer through a fitting formula of power and voltage; step 2, subtracting the RFID actual output power value obtained in the step 1 from a preset target value, stopping calibration if the absolute value obtained by subtraction is smaller than the error tolerance specified by the system, and turning to the step 3 if the absolute value obtained by subtraction is larger than the error tolerance specified by the system; step 3, comparing the RFID actual output power value with a preset target value, if the actual output power value is smaller than the preset target value, turning to step 4, and if the actual output power value is larger than the preset target value, turning to step 5; step 4, increasing the value of the power fine adjustment register, and turning to step 1; step 5, reducing the value of the power fine adjustment register, and turning to step 1; the power calibration technical scheme solves the problems that the output power of the system cannot be accurately controlled and the adjustment step length of the output power cannot be accurately controlled due to the manufacturing process factors of chips, the PCB plate making process factors, the off-chip component factors and the working environment temperature factors; the RFID reader-writer system transmits radio frequency signals to reach a target value according to the set power, however, the RFID reader-writer system is subjected to the distance between the tag and the reader-writer, the interference of external signals and the operation specification, so that the actual receiving effect of the RFID tag is reduced, and the RFID reader-writer system can not recognize the RFID tag in a low-efficiency manner or can not recognize the RFID tag accurately.

Disclosure of Invention

In order to solve the problems that the existing RFID reader system transmits radio frequency signals according to fixed power in the operation process, the strength of the reflected signals of the RFID tag is easily affected by the surrounding environment because the RFID tag is passive equipment, and the identification efficiency of the RFID reader system is low or the RFID reader system cannot be accurately identified due to the distance between the tag and the reader, the reading power, signal interference and operation specifications, the dynamic transmission power adjustment is realized, the anti-interference performance is good, the identification position and the distance prompt are carried out according to the feedback result of the received signals, and the identification precision and the identification efficiency of the RFID reader system are provided.

The invention is realized by the following technical scheme: a method of operating a dynamically power controllable RFID reader, the method comprising the steps of:

s1, setting an initial power parameter of signal transmission of an RFID reader-writer and a time period parameter of signal transmission interval of the RFID reader-writer;

s2, processing and generating signal transmission time sequence data of the RFID reader-writer according to system time point parameters of the starting operation of the RFID reader-writer and time period parameters of the signal transmission interval of the RFID reader-writer;

s3, acquiring initial power parameters of signal transmission of the RFID reader-writer; adopting a dichotomy to process initial power parameters of the signal emission of the RFID reader-writer as incremental processing of the signal emission of the RFID reader-writer along with the change of the signal emission time sequence of the RFID reader-writer to generate the signal emission adjustment power data of the RFID reader-writer;

S4, the RFID reader-writer signal emission time sequence data and the RFID reader-writer signal emission adjustment power data are matched one by one according to the signal emission time sequence and the signal emission adjustment power to generate RFID reader-writer signal emission time sequence power adjustment data, and the RFID reader-writer and RFID tag identification operation is carried out by combining the initial power parameter of the RFID reader-writer signal emission and the RFID reader-writer signal emission time sequence power adjustment data;

s5, detecting an RFID reader-writer time sequence receiving signal fed back by the RFID tag according to the time sequence number; when the time sequence receiving signal of the RFID reader-writer exists, the completion of the identification operation of the RFID reader-writer and the RFID tag is indicated, and when the time sequence receiving signal of the RFID reader-writer does not exist, the incompletion of the identification operation of the RFID reader-writer and the RFID tag is indicated;

s6, according to the result that the signal receiving result of the RFID reader-writer time sequence is not detected in S5, searching the signal transmitting and adjusting power data of the RFID reader-writer corresponding to the next signal transmitting and adjusting data of the signal transmitting and adjusting time sequence according to the signal transmitting and adjusting time sequence data of the RFID reader-writer by adopting a searching algorithm;

s7, acquiring a received signal time sequence number according to the result that the time sequence received signal of the RFID reader-writer is not detected in S5, and continuously executing the identification operation of the RFID reader-writer and the RFID tag when the received signal time sequence number is smaller than the maximum received signal time sequence number, which indicates that the signal emission adjustment power data of the RFID reader-writer is not executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, the signal emission adjustment power data of the RFID reader-writer is executed, and the RFID reader-writer and the RFID label identification operation are still not completed, the early warning prompts an operator to notice that the RFID reader-writer and the RFID label identification position and the identification distance repeatedly execute the RFID reader-writer and the RFID label identification operation according to the specification.

Preferably, the operation steps of setting the initial power parameter of the signal transmission of the RFID reader and the time period parameter of the signal transmission interval of the RFID reader are as follows:

s11, setting initial power parameters of signal transmission of the RFID reader-writer as；

S12, setting the time period parameter of the signal transmission interval of the RFID reader-writer as。

Preferably, the operation steps of generating the signal transmission time sequence data of the RFID reader-writer according to the system time point parameter of the start operation of the RFID reader-writer and the time period parameter of the signal transmission interval of the RFID reader-writer are as follows:

s21, establishing a system time point parameter for starting operation of the RFID reader-writer as follows；

S22, starting running system time point parameters by using RFID reader-writerThe time period parameter matched with the signal transmission interval of the RFID reader-writer is +.>Establishing an RFID reader-writer signal transmission time sequence data matrix>；The method comprises the steps of carrying out a first treatment on the surface of the Wherein->Indicate->And transmitting time sequence data by the RFID reader-writer signals, wherein r represents the maximum value of the number of the time sequence data transmitted by the RFID reader-writer signals.

Preferably, the initial power parameter of the signal transmission of the RFID reader-writer is obtained; the operation steps of adopting a dichotomy to process the initial power parameter of the signal emission of the RFID reader-writer as the incremental processing of the signal emission of the RFID reader-writer along with the change of the signal emission time sequence of the RFID reader-writer to generate the signal emission adjustment power data of the RFID reader-writer are as follows:

S31, acquiring initial power parameters of signal transmission of the RFID reader-writer；

S32, processing initial power parameters of signal transmission of RFID reader-writer by adopting dichotomyGenerating a power increment of the signal transmission time sequence change of the RFID reader-writer>；

S33, establishing an RFID reader-writer signal emission adjustment power data matrix；The method comprises the steps of carrying out a first treatment on the surface of the Wherein->Indicate->The number of RFID reader signal emissions adjustment power data, where r represents the maximum value of the number of RFID reader signal emissions adjustment power data.

Preferably, the step of matching the signal emission time sequence data of the RFID reader and the signal emission adjustment power data of the RFID reader according to the signal emission time sequence and the signal emission adjustment power one by one to generate the signal emission time sequence power adjustment data of the RFID reader, and combining the initial power parameter of the signal emission of the RFID reader and the signal emission time sequence power adjustment data of the RFID reader to perform the operation of identifying the RFID reader and the RFID tag is as follows:

s41, calling system time point parameters of starting operation of RFID reader-writerAnd the initial power parameter of the signal transmission of the RFID reader/writer +.>；

S42, calling the signal transmission time sequence data matrix of the RFID reader-writerAnd RFID reader signal emission adjustment power data matrix +. >；

S43, transmitting the RFID reader-writer signal to the time sequence data matrixAnd RFID reader signal emission adjustment power data matrix +.>Generating an RFID reader signal transmission time sequence power adjustment data matrix according to the signal transmission time sequence data and the signal transmission adjustment power data matching

The method comprises the steps of carrying out a first treatment on the surface of the Wherein->；/>The method comprises the steps of carrying out a first treatment on the surface of the RFID reader signal emission adjustment power data +.>Number->And RFID reader signal transmission time sequence data +.>Number->The values are the same in one-to-one correspondence;

s44, firstly, parameters of the RFID reader-writer at a system time pointStarting operation according to the initial power parameter +.>The transmitting signal carries out the identification operation of the RFID reader-writer and the RFID tag, and then the data matrix is adjusted according to the signal transmitting time sequence power of the RFID reader-writer>Time sequence data of signal transmission of medium RFID reader-writer>And adjusting power data corresponding to signal transmission of RFID reader/writer +.>And carrying out RFID reader-writer and RFID label identification operation orderly.

Preferably, the time sequence receiving signals of the RFID reader fed back by the RFID tag are detected according to the time sequence number; when the time sequence receiving signal of the RFID reader-writer exists, the completion of the identification operation of the RFID reader-writer and the RFID tag is indicated, and when the time sequence receiving signal of the RFID reader-writer does not exist, the incomplete operation steps of the identification operation of the RFID reader-writer and the RFID tag are indicated as follows:

S51, when the RFID reader-writer and the RFID tag perform orderly identification operation according to the signal transmission time sequence and the corresponding signal transmission adjustment power in S44, the parameters at the system time point are as followsOr the signal transmission time sequence data of the RFID reader-writer>The RFID reader-writer is according to the initial power parameter +.>Or RFID reader signal emission adjustment power data +.>After transmitting the signal, the time sequence receiving signal of the RFID reader/writer which receives the feedback of the RFID tag according to the time sequence number 0 or n>Or->；

S52, when∉ empty set or->∉ empty set indicates that the time sequence receiving signals of the RFID reader exist, and indicates that the identification operation of the RFID reader and the RFID tag is completed;

when (when)E empty set or ∈>And E, an empty set indicates that the time sequence receiving signal of the RFID reader-writer does not exist, and indicates that the identification operation of the RFID reader-writer and the RFID tag is not completed.

Preferably, according to the result that the signal received by the RFID reader is not detected in S5, the operation steps of searching the signal transmission adjustment power data of the RFID reader corresponding to the next signal transmission time sequence data in the signal transmission time sequence power adjustment data of the RFID reader by adopting a search algorithm according to the signal transmission time sequence data of the RFID reader are as follows:

s61, when the RFID reader-writer time sequence receives signals E empty set or ∈>E result of empty set, based on RFID readingThe writer is at system time point parameter +.>Or the signal transmission time sequence power adjustment data matrix of the RFID reader-writer>Time sequence data of signal transmission of medium RFID reader-writer>Corresponding next signal transmission timing data->Or->Adjusting data matrix by adopting simulated annealing algorithm at signal transmission time sequence power of RFID reader-writer>Search out->Or->Adjusting power data corresponding to signal emission of RFID reader-writerOr->；

Data matrix is adjusted by adopting simulated annealing algorithm at signal transmission time sequence power of RFID reader-writerSearch out->Or (b)Adjusting power data corresponding to signal emission of RFID reader-writer>Or->The operation steps of (a) are as follows:

step one: data matrix for adjusting signal transmitting time sequence power of RFID reader-writerSetting the initial temperature +.>Order-makingAnd adjusting the data matrix in the signal transmission time sequence power of the RFID reader/writer>Setting a termination temperature +.>And a random initial solution +.>I.e. signal transmission timing data->Or->Respectively corresponding RFID reader signal transmission adjustment power data +.>Or->Let the current solution->

Step two: data matrix for adjusting signal transmitting time sequence power of RFID reader-writerThe current temperature of the inner part is changed,，/>the value of (2) is 0.5-0.99;

Step three: calculating the current stateThe internal energy of the solution->Function value, perturbing according to current state, generating a new solution +.>Namely temperature change signal transmission time sequence data +.>Or->Respectively corresponding RFID reader signal transmission adjustment power data +.>Or->Calculate->；

Step four: if it isIf the value is less than 0, accepting the solution, otherwise accepting the solution with probability P;

step five: at the current temperature, the third step and the fourth step are circularly executed for k times

Step six: comparison ofAnd->The size of (1)>﹤/>Terminating, indicating temperature +.>Under the condition of signal transmission time sequence data +>、/>Corresponding RFID reader signal emission adjustment power data +.>、/>The solution is the global optimal solution, otherwise, executing the second step;

data matrix for adjusting signal transmitting time sequence power of RFID reader-writerSearch out->Or->Adjusting power data corresponding to signal emission of RFID reader-writer>Or->And performing RFID reader-writer and RFID label identification operation.

Preferably, according to the result that the signal sequence received by the RFID reader is not detected in S5, a received signal sequence number is obtained, and when the received signal sequence number is smaller than the maximum received signal sequence number, it indicates that the signal transmission adjustment power data of the RFID reader is not executed, and the RFID reader and the RFID tag identification operation are continuously executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, which indicates that the execution of the signal emission adjustment power data of the RFID reader-writer is completed and the RFID reader-writer and RFID tag identification operation is still not completed, the early warning prompts an operator to notice that the RFID reader-writer and the RFID tag identification position and the identification distance repeatedly execute the RFID reader-writer and the RFID tag identification operation according to the specification, and the operating steps are as follows:

S71, receiving signals according to the time sequence of the RFID reader-writerE empty set or ∈>E, detecting the empty set, and acquiring a time sequence receiving signal of the RFID reader-writer>Or->The corresponding RFID reader-writer is according to the initial power parameter +.>Or RFID reader signal emission adjustment power data +.>；

According to the RFID reader-writer and the initial power parameterOr RFID reader signal emission adjustment power data +.>Acquiring corresponding system time point parameters +.>Time series number 0 or RFID reader/writer signal transmission time series data +.>Is a timing sequence number n of (2);

s72, judging system time point parametersTime series number 0 or RFID reader/writer signal transmission time series data +.>Comparing the time sequence number n of (2) with the maximum value of the time sequence number n, and obtaining +.>The method comprises the steps of carrying out a first treatment on the surface of the The maximum value of the instant time number n is r;

because r is more than or equal to 1, namely 0 is less than r, the data matrix for adjusting the signal emission of the RFID reader-writerTime sequence data of signal transmission of RFID reader/writer in (a)>If not, continuing to execute the RFID reader-writer and the RFID tag identification operation;

when n is smaller than r, the signal emission adjustment power data matrix of the RFID reader-writer is representedTime sequence data of signal transmission of RFID reader/writer in (a)>If not, continuing to execute the RFID reader-writer and the RFID tag identification operation;

When n=r, it represents the RFID reader signal emission adjustment power data matrixRFID read in (B)Write signal emission timing data->After the execution is completed, the voice early warning is used for prompting the operator to pay attention to the recognition positions and recognition distances of the RFID reader-writer and the RFID tag to carry out standard recognition operation, and meanwhile, the RFID reader-writer carries out recognition operation with the RFID tag again according to the step S44.

The system for realizing the running method of the RFID reader-writer capable of dynamically controlling the power comprises an RFID system signal transmission control module, an RFID system signal transmission time sequence and transmission power distribution module, an RFID system transmission signal power adjustment module and an RFID system identification state space position prompt module;

the RFID system signal transmission control module comprises an RFID system signal transmission initial power setting unit and an RFID system signal transmission time period setting unit;

the RFID system signal transmission initial power setting unit is used for setting initial power parameters of the RFID reader-writer signal transmission; the RFID system signal emission time period setting unit is used for setting time period parameters of the RFID reader-writer signal emission interval;

the RFID system signal transmission time sequence and transmission power distribution module comprises an RFID system signal transmission time sequence distribution unit, an RFID system signal transmission power distribution unit and an RFID system signal transmission time sequence and power matching unit;

The RFID system signal emission time sequence distribution unit processes and generates RFID reader signal emission time sequence data according to system time point parameters of the RFID reader start operation and time period parameters of the RFID reader signal emission interval; the RFID system signal transmitting power distribution unit acquires initial power parameters of signal transmission of an RFID reader-writer; adopting a dichotomy to process initial power parameters of the signal emission of the RFID reader-writer as incremental processing of the signal emission of the RFID reader-writer along with the change of the signal emission time sequence of the RFID reader-writer to generate the signal emission adjustment power data of the RFID reader-writer; the RFID system signal transmission time sequence and power matching unit is used for matching the RFID reader-writer signal transmission time sequence data and the RFID reader-writer signal transmission adjustment power data one by one according to the signal transmission time sequence and the signal transmission adjustment power to generate RFID reader-writer signal transmission time sequence power adjustment data;

the RFID system transmitting signal power adjustment module comprises an RFID system time sequence transmitting signal execution unit, an RFID system time sequence receiving signal detection unit and an RFID system time sequence transmitting power retrieval adjustment unit;

the RFID system time sequence emission signal execution unit is used for carrying out RFID reader-writer and RFID tag identification operation by combining initial power parameters of RFID reader-writer signal emission and RFID reader-writer signal emission time sequence power adjustment data; the RFID system time sequence receiving signal detection unit detects an RFID reader time sequence receiving signal fed back by an RFID tag according to the time sequence number; when the time sequence receiving signal of the RFID reader-writer exists, the completion of the identification operation of the RFID reader-writer and the RFID tag is indicated, and when the time sequence receiving signal of the RFID reader-writer does not exist, the incompletion of the identification operation of the RFID reader-writer and the RFID tag is indicated; the RFID system time sequence emission power retrieval and adjustment unit is used for searching the RFID reader signal emission adjustment power data corresponding to the next signal emission time sequence data according to the time sequence in the RFID reader signal emission time sequence power adjustment data by adopting a simulated annealing algorithm according to the non-detection RFID reader signal emission time sequence receiving signal result;

The RFID system transmitting signal power adjusting module comprises an RFID system final time sequence receiving signal sensing unit, an RFID system reader-writer and a tag identification position prompting unit;

the last time sequence received signal sensing unit of the RFID system is used for acquiring a received signal time sequence number according to the result that the time sequence received signal of the RFID reader is not detected, and when the received signal time sequence number is smaller than the maximum received signal time sequence number, the signal emission adjustment power data of the RFID reader is not executed, and the RFID reader and the RFID tag identification operation are continuously executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, the execution of the signal emission adjustment power data of the RFID reader-writer is finished, and the identification operation of the RFID reader-writer and the RFID tag still cannot be finished; when the time sequence number of the received signal is equal to the maximum time sequence number of the received signal, the reader-writer and the tag identification position prompting unit of the RFID system can not complete the RFID reader-writer and the RFID tag identification operation, and voice early warning is adopted to prompt operators to pay attention to the RFID reader-writer and the RFID tag identification position and the identification distance, and the RFID reader-writer and the RFID tag identification operation are repeatedly executed according to specifications.

The invention provides an RFID reader-writer capable of controlling dynamic power. The beneficial effects are as follows:

the method comprises the steps that an initial power setting unit for transmitting signals of an RFID system and a time period setting unit for transmitting signals of the RFID system are matched to set initial power parameters and interval time period parameters of signal transmission of an RFID reader-writer, so that the flexibility and application scene of the initial power dynamic adjustment of the RFID reader-writer and the adjustment of the signal transmission power of the RFID reader-writer according to the time interval are increased; the RFID system signal transmission time sequence distribution unit and the RFID system signal transmission power distribution unit cooperate with the system time point parameter of the RFID reader-writer starting operation and the time period parameter of the RFID reader-writer signal transmission interval to generate the RFID reader-writer signal transmission time sequence data, so that the RFID reader-writer signal transmission power is scientifically and dynamically adjusted according to the time sequence; the initial power parameter of the signal emission of the RFID reader-writer is utilized, and the initial power parameter is processed by a dichotomy method to be used as the increment of the signal emission of the RFID reader-writer along with the change of the signal emission time sequence of the RFID reader-writer to generate the signal emission adjustment power data of the RFID reader-writer, so that the signal emission power of the RFID reader-writer is flexibly and dynamically increased, and the identification precision of an RFID system is improved.

Detecting an RFID reader time sequence receiving signal fed back by an RFID tag according to the time sequence number by an RFID system time sequence receiving signal detection unit; when the time sequence receiving signals of the RFID reader-writer exist, the RFID reader-writer and the RFID label identification operation are completed, when the time sequence receiving signals of the RFID reader-writer do not exist, the RFID reader-writer and the RFID label identification operation are not completed, the feedback transmitting signals of the RFID label are detected, the automatic detection of the recognition results of the RFID reader-writer and the RFID label is realized, the time sequence transmitting power retrieval and adjustment unit of the RFID system searches the signal transmitting power adjusting power data of the RFID reader-writer corresponding to the next signal transmitting time sequence data according to the time sequence receiving signals of the RFID reader-writer and the time sequence receiving signals which are not detected by the time sequence transmitting power retrieval and adjustment unit of the RFID system, the time sequence and search algorithm are adopted to control the transmitting power of the RFID reader-writer in a grading mode, the signal transmitting power dynamic adjustment of the RFID reader-writer is realized, and the anti-interference performance and the recognition efficiency of the RFID system are improved.

3. Acquiring a received signal time sequence number by the last time sequence received signal sensing unit of the RFID system and the reader-writer and tag identification position prompting unit of the RFID system in cooperation with the time sequence received signal result according to the fact that the RFID reader-writer is not detected, and continuously executing the RFID reader-writer and the RFID tag identification operation when the received signal time sequence number is smaller than the maximum received signal time sequence number, wherein the received signal time sequence number indicates that the signal emission adjustment power data of the RFID reader-writer is not executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, the execution of the signal emission adjustment power data of the RFID reader-writer is completed, the RFID reader-writer and the RFID label identification operation still cannot be completed, the voice early warning is adopted to prompt an operator to pay attention to the RFID reader-writer and the RFID label identification position and identification distance to repeatedly execute the RFID reader-writer and the RFID label identification operation according to the specifications, the operator is prompted to adjust the identification position and the identification distance according to the specifications according to the feedback result of the receiving signal of the RFID reader-writer, the problem that the RFID system identification efficiency is low or the RFID system cannot be identified due to the fact that the identification distance between the RFID reader-writer and the RFID label is too large or the identification position is offset is effectively avoided, and the RFID system identification efficiency and reliability are improved.

Drawings

FIG. 1 is a diagram of the functional modules of a system for the method for operating a dynamically power controllable RFID reader;

fig. 2 is a flow chart of a method for operating the RFID reader shown in fig. 1, which can be controlled by dynamic power.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The embodiment of the RFID reader-writer capable of dynamic power control is as follows:

referring to fig. 1-2, a method for operating an RFID reader capable of dynamic power control includes the steps of:

Further, referring to fig. 1-2, the operation steps of setting the initial power parameter of the signal transmission of the RFID reader and the time period parameter of the signal transmission interval of the RFID reader are as follows:

The operation steps for generating the signal transmission time sequence data of the RFID reader-writer according to the system time point parameters of the RFID reader-writer starting operation and the time period parameters of the signal transmission interval of the RFID reader-writer are as follows:

Acquiring an initial power parameter of signal transmission of an RFID reader-writer; the operation steps of adopting a dichotomy to process the initial power parameter of the signal emission of the RFID reader-writer as the incremental processing of the signal emission of the RFID reader-writer along with the change of the signal emission time sequence of the RFID reader-writer to generate the signal emission adjustment power data of the RFID reader-writer are as follows:

Further, referring to fig. 1-2, the operation steps of performing the RFID reader-writer and RFID tag identification operation by matching the RFID reader-writer signal emission timing data and the RFID reader-writer signal emission adjustment power data according to the signal emission timing and the signal emission adjustment power in a one-to-one correspondence manner to generate the RFID reader-writer signal emission timing power adjustment data, and combining the initial power parameter of the RFID reader-writer signal emission and the RFID reader-writer signal emission timing power adjustment data are as follows:

S41, callSystem time point parameter for starting operation of RFID reader-writerAnd the initial power parameter of the signal transmission of the RFID reader/writer +.>；

S42, calling the signal transmission time sequence data matrix of the RFID reader-writerAnd RFID reader signal emission adjustment power data matrix +.>；

Detecting an RFID reader-writer time sequence receiving signal fed back by the RFID tag according to the time sequence number; when the time sequence receiving signal of the RFID reader-writer exists, the completion of the identification operation of the RFID reader-writer and the RFID tag is indicated, and when the time sequence receiving signal of the RFID reader-writer does not exist, the incomplete operation steps of the identification operation of the RFID reader-writer and the RFID tag are indicated as follows:

According to the result that the signal receiving result of the RFID reader-writer time sequence is not detected in the S5, the operation steps of searching the RFID reader-writer signal transmitting adjustment power data corresponding to the next signal transmitting time sequence data in the RFID reader-writer signal transmitting time sequence power adjustment data according to the RFID reader-writer signal transmitting time sequence data by adopting a search algorithm are as follows:

s61, when the RFID reader-writer time sequence receives signalsE empty set or ∈>E, result of empty set, according to RFID reader-writer in system time point parameter +. >Or the signal transmission time sequence power adjustment data matrix of the RFID reader-writer>Time sequence data of signal transmission of medium RFID reader-writer>Corresponding next signal transmission timing data->Or->Adjusting data matrix by adopting simulated annealing algorithm at signal transmission time sequence power of RFID reader-writer>Search out->Or->Adjusting power data corresponding to signal emission of RFID reader-writerOr->；

step one: data matrix for adjusting signal transmitting time sequence power of RFID reader-writerSetting the initial temperature +.>Order-makingAnd adjusting the data matrix in the signal transmission time sequence power of the RFID reader/writer>Setting a termination temperature +.>And a random initial solution +.>I.e. signal transmission timing data->Or->Respectively corresponding RFID reader signal transmission adjustment power data +.>Or->Let the current solution->/>

step three: calculating the current stateThe internal energy of the solution->Function value, perturbing according to current state, generating a new solution +. >Namely temperature change signal transmission time sequence data +.>Or->Respectively corresponding RFID reader signal transmission adjustment power data +.>Or->Calculate->；

Further, referring to fig. 1-2, according to the result that the time sequence received signal of the RFID reader is not detected in S5, a time sequence number of the received signal is obtained, when the time sequence number of the received signal is smaller than the maximum time sequence number of the received signal, it indicates that the signal emission adjustment power data of the RFID reader is not executed, and the RFID reader and the RFID tag identification operation are continuously executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, which indicates that the execution of the signal emission adjustment power data of the RFID reader-writer is completed and the RFID reader-writer and RFID tag identification operation is still not completed, the early warning prompts an operator to notice that the RFID reader-writer and the RFID tag identification position and the identification distance repeatedly execute the RFID reader-writer and the RFID tag identification operation according to the specification, and the operating steps are as follows:

According to the RFID reader-writer and the initial power parameterOr RFID reader signal emission adjustment power data +.>Acquiring corresponding system time point parameters +. >Time series number 0 or RFID reader/writer signal transmission time series data +.>Is a timing sequence number n of (2);

when n=r, it represents the RFID reader signal emission adjustment power data matrixTime sequence data of signal transmission of RFID reader/writer in (a)>After the execution is completed, the voice early warning is used for prompting the operator to pay attention to the recognition positions and recognition distances of the RFID reader-writer and the RFID tag to carry out standard recognition operation, and meanwhile, the RFID reader-writer carries out recognition operation with the RFID tag again according to the step S44.

Acquiring a received signal time sequence number by the last time sequence received signal sensing unit of the RFID system and the reader-writer and tag identification position prompting unit of the RFID system in cooperation with the time sequence received signal result according to the fact that the RFID reader-writer is not detected, and continuously executing the RFID reader-writer and the RFID tag identification operation when the received signal time sequence number is smaller than the maximum received signal time sequence number, wherein the received signal time sequence number indicates that the signal emission adjustment power data of the RFID reader-writer is not executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, the execution of the signal emission adjustment power data of the RFID reader-writer is completed, the RFID reader-writer and the RFID label identification operation still cannot be completed, the voice early warning is adopted to prompt an operator to pay attention to the RFID reader-writer and the RFID label identification position and identification distance to repeatedly execute the RFID reader-writer and the RFID label identification operation according to the specifications, the operator is prompted to adjust the identification position and the identification distance according to the specifications according to the feedback result of the receiving signal of the RFID reader-writer, the problem that the RFID system identification efficiency is low or the RFID system cannot be identified due to the fact that the identification distance between the RFID reader-writer and the RFID label is too large or the identification position is offset is effectively avoided, and the RFID system identification efficiency and reliability are improved.

The system for realizing the operation method of the RFID reader-writer capable of controlling the dynamic power comprises an RFID system signal transmission control module, an RFID system signal transmission time sequence and transmission power distribution module, an RFID system transmission signal power adjustment module and an RFID system identification state space position prompt module;

the RFID system signal emission time sequence distribution unit processes and generates RFID reader signal emission time sequence data according to system time point parameters of the RFID reader start operation and time period parameters of the RFID reader signal emission interval; the RFID system signal transmitting power distribution unit is used for acquiring initial power parameters of signal transmission of the RFID reader-writer; adopting a dichotomy to process initial power parameters of the signal emission of the RFID reader-writer as incremental processing of the signal emission of the RFID reader-writer along with the change of the signal emission time sequence of the RFID reader-writer to generate the signal emission adjustment power data of the RFID reader-writer; the RFID system signal transmission time sequence and power matching unit is used for matching the RFID reader signal transmission time sequence data with the RFID reader signal transmission adjustment power data one by one according to the signal transmission time sequence and the signal transmission adjustment power to generate RFID reader signal transmission time sequence power adjustment data;

the RFID system time sequence emission signal execution unit is used for carrying out RFID reader-writer and RFID tag identification operation by combining initial power parameters emitted by the RFID reader-writer signals and the RFID reader-writer signal emission time sequence power adjustment data; the RFID system time sequence receiving signal detection unit detects an RFID reader time sequence receiving signal fed back by the RFID tag according to the time sequence number; when the time sequence receiving signal of the RFID reader-writer exists, the completion of the identification operation of the RFID reader-writer and the RFID tag is indicated, and when the time sequence receiving signal of the RFID reader-writer does not exist, the incompletion of the identification operation of the RFID reader-writer and the RFID tag is indicated; the RFID system time sequence emission power retrieval and adjustment unit is used for searching the RFID reader signal emission adjustment power data corresponding to the next signal emission time sequence data according to the time sequence in the RFID reader signal emission time sequence power adjustment data by adopting a simulated annealing algorithm according to the non-detection RFID reader signal emission time sequence receiving signal result;

the last time sequence receiving signal sensing unit of the RFID system is used for acquiring a receiving signal time sequence number according to the result that the time sequence receiving signal of the RFID reader is not detected, and when the receiving signal time sequence number is smaller than the maximum receiving signal time sequence number, the signal emission adjustment power data of the RFID reader is not executed, and the RFID reader and the RFID tag identification operation are continuously executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, the execution of the signal emission adjustment power data of the RFID reader-writer is finished, and the identification operation of the RFID reader-writer and the RFID tag still cannot be finished; and when the time sequence number of the received signal is equal to the maximum time sequence number of the received signal, the reader-writer and the tag identification position prompting unit of the RFID system fail to complete the RFID reader-writer and the RFID tag identification operation, and voice early warning is adopted to prompt operators to pay attention to the RFID reader-writer and the RFID tag identification position and the identification distance, and the RFID reader-writer and the RFID tag identification operation are repeatedly executed according to specifications.

Claims

1. A method of operating a dynamically power controllable RFID reader, the method comprising the steps of:

S12, setting the time period parameter of the signal transmission interval of the RFID reader-writer as；

S22, starting running system time point parameters by using RFID reader-writerThe time period parameter matched with the signal transmission interval of the RFID reader-writer is +.>Establishing an RFID reader-writer signal transmission time sequence data matrix>；/>The method comprises the steps of carrying out a first treatment on the surface of the Wherein->Indicate->The signal of each RFID reader transmits time sequence data;

s31, acquiring initial power parameters of signal transmission of the RFID reader-writer ；

S33, establishing an RFID reader-writer signal emission adjustment power data matrix；/>The method comprises the steps of carrying out a first treatment on the surface of the Wherein->Indicate->The signal emission of each RFID reader/writer adjusts the power data;

S43, transmitting the RFID reader-writer signal to the time sequence data matrixAnd RFID reader signal emission adjustment power data matrixAdjustment according to signal transmission timing data and signal transmissionGenerating RFID reader signal transmitting time sequence power adjustment data matrix by power data matching

s44, firstly, parameters of the RFID reader-writer at a system time pointStarting operation according to the initial power parameter +.>The transmitting signal carries out the identification operation of the RFID reader-writer and the RFID tag, and then the data matrix is adjusted according to the signal transmitting time sequence power of the RFID reader-writerTime sequence data of signal transmission of medium RFID reader-writer>And corresponding RFID reader-writerSignal transmission adjustment power data->Carrying out RFID reader-writer and RFID label identification operation orderly;

s51, when the RFID reader-writer and the RFID tag perform orderly identification operation according to the signal transmission time sequence and the corresponding signal transmission adjustment power in S44, the parameters at the system time point are as followsOr the signal transmission time sequence data of the RFID reader-writer>The RFID reader-writer is according to the initial power parameter +. >Or RFID reader signal emission adjustment power data +.>After transmitting the signal, the time sequence receiving signal of the RFID reader/writer which receives the feedback of the RFID tag according to the time sequence number 0 or n>Or->；

when (when)E empty set or ∈>The E empty set indicates that the time sequence receiving signal of the RFID reader-writer does not exist, and indicates that the identification operation of the RFID reader-writer and the RFID tag is not completed;

s61, when the RFID reader-writer time sequence receives signalsE empty set or ∈>E, result of empty set, according to RFID reader-writer in system time point parameter +.>Or the signal transmission time sequence power adjustment data matrix of the RFID reader-writer>Time sequence data of signal transmission of medium RFID reader-writer>Corresponding next signal transmission timing data->Or->Adjusting data matrix by adopting simulated annealing algorithm at signal transmission time sequence power of RFID reader-writer >Search out->Or->Adjusting power data corresponding to signal emission of RFID reader-writer>Or (b)；

Data matrix is adjusted by adopting simulated annealing algorithm at signal transmission time sequence power of RFID reader-writerSearch out->Or->Adjusting power data corresponding to signal emission of RFID reader-writer>Or->The operation steps of (a) are as follows:

step one: data matrix for adjusting signal transmitting time sequence power of RFID reader-writerSetting the initial temperature +.>Order-makingAnd adjusting the data matrix in the signal transmission time sequence power of the RFID reader/writer>Setting a termination temperature +.>And a random initial solution +.>I.e. signal transmission timing data->Or->Respectively corresponding RFID reader signal transmission adjustment power data +.>Or->Let the current solution->；

data matrix for adjusting signal transmitting time sequence power of RFID reader-writerSearch out->Or->Adjusting power data corresponding to signal emission of RFID reader-writer>Or->And performing RFID reader-writer and RFID label identification operation;

s7, acquiring a received signal time sequence number according to the result that the time sequence received signal of the RFID reader-writer is not detected in S5, and continuously executing the identification operation of the RFID reader-writer and the RFID tag when the received signal time sequence number is smaller than the maximum received signal time sequence number, which indicates that the signal emission adjustment power data of the RFID reader-writer is not executed; when the receiving signal time sequence number is equal to the maximum receiving signal time sequence number, the signal emission adjustment power data of the RFID reader-writer is executed, and the RFID reader-writer and the RFID label identification operation are still not completed, the early warning prompts an operator to notice that the RFID reader-writer and the RFID label identification position and the identification distance repeatedly execute the RFID reader-writer and the RFID label identification operation according to the specification;

2. A system for realizing the operation method of the RFID reader-writer capable of dynamic power control according to claim 1, wherein the system comprises an RFID system signal transmission control module, an RFID system signal transmission time sequence and transmission power distribution module, an RFID system transmission signal power adjustment module and an RFID system identification state space position prompting module;