CN107506675A - Optimize the method for RFID reader multi-tag handling process - Google Patents
Optimize the method for RFID reader multi-tag handling process Download PDFInfo
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- CN107506675A CN107506675A CN201710712631.XA CN201710712631A CN107506675A CN 107506675 A CN107506675 A CN 107506675A CN 201710712631 A CN201710712631 A CN 201710712631A CN 107506675 A CN107506675 A CN 107506675A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10029—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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Abstract
The present invention relates to a kind of method for optimizing RFID reader multi-tag handling process, this method is collided including response of the electronic tag to order of making an inventory, without replying, having reply and three kinds of situations of collisionless, and applicable criterion is set to read write line；The signal processing module for increasing read write line is decoded into power to the tag return information that collides；The multiple labels anti-collision handling process suggested in optimization GJB7377.1 2011, delete order inefficient in multi-tag processing, the frequency of use of the higher order of increase efficiency；Binding test experiment is configured to the continuous collision threshold being related in multiple labels anti-collision handling process and continuous Tidle threshold.Its advantage is shown：The present invention can substantially reduce the probability that military read write line carries out occurring the situation for omitting label when single-wheel is made an inventory, improve the efficiency that military read write line reads multi-tag, and the method for the invention reduces free time and collision time, also the speed for reading multi-tag is increased.
Description
Technical field
The present invention relates to technical field of RFID, relates generally to the optimization of military read write line multiple labels anti-collision flow.
Background technology
Radio-frequency recognition system mainly includes radio frequency recognizing electronic label and radio-frequency identification reader/writer.Radio frequency identification is exactly to use
Read write line is made an inventory one or more electronic tag.Military RFID reader is one kind of radio-frequency identification reader/writer, and it has height
The features such as reliability, high stability, high security.Making an inventory for multi-tag is the important composition portion of military RFID reader application
Point, and what multi-tag was made an inventory carries out too busy to get away military RFID reader multi-tag handling process.The quality of multi-tag handling process
The efficiency that the multi-tag of RFID reader is made an inventory is directly influenced, the key of optimization RFID reader multi-tag handling process is exactly
The problem of how effectively handling multiple labels anti-collision.
Although GJB7377.1-2011 is referred to multiple labels anti-collision handling process, as shown in figure 1, but that is a ginseng
Examine.The recoil state that label is received after the order of eating dishes without rice or wine that read write line is sent be divided into without reply, have reply collisionless, have reply and send out
Raw to collide, the multiple labels anti-collision handling process in Fig. 1 is built upon read write line can the 100% correct recoil state for distinguishing label
On the premise of, in practical application read write line by the factors such as environment influenceed can not the 100% correct recoil state for distinguishing label,
The characteristic for read write line is needed to carry out related Optimization Work.
Chinese patent literature CN200910199114.2, the applying date 20091120, patent name is：Ultrahigh frequency RFID is read and write
The label detection and dynamic load optimization method of device, disclose the label detection and load dynamic of a kind of ultrahigh frequency radio frequency identification (RFID) reader
Optimization method, it comprises the following steps S1 to S9：Such as S1, initialize ultrahigh frequency radio frequency identification (RFID) reader and working condition：Its wire size
The number for being zero for M, continuous reading antenna radiation scope interior label is N, without label when read write line time of having a rest be T1, have mark
The time of having a rest of read write line is T2 during label, and T1 is more than T2；It is without label, currently to set in the range of each aerial radiation original state
Scanning antenna m scans since No.1 antenna；S2, m antennas are selected, judge whether there is label in the range of m aerial radiations,
If yes then enter step S5；If otherwise enter step S3.
Above-mentioned patent document by detect in the range of aerial radiation whether with the presence of label come the negative of dynamic optimization read write line
Lotus is distributed, and so as to improve the tag recognition efficiency in each antenna range, adapts dynamically to work on the spot environment, reduces deployment read-write
The technical difficulty of device.But how effectively to handle asking for multiple labels anti-collision on RFID reader multi-tag handling process
Topic then carries out disclosure without appropriate technical solution.
In summary, it is necessary to a kind of method for optimizing military RFID reader multi-tag handling process, it is ensured that a wheel is made an inventory
All electronic tags in identification range can all be read, and realize the lifting for reading multi-tag speed.
The content of the invention
The purpose of the present invention is to be directed to deficiency of the prior art, there is provided one kind optimizes at military RFID reader multi-tag
The method for managing flow a, it is ensured that wheel is made an inventory and can all read all electronic tags in identification range, and realizes that reading more and mark
Sign the lifting of speed.
To achieve the above object, the present invention adopts the technical scheme that：
A kind of method for optimizing RFID reader multi-tag handling process, it is characterised in that the optimization RFID reader
The method of multi-tag handling process includes：
Step S1：Applicable criterion is set to military read write line, rationally judges that multi-tag reads electronics mark in scene
The recoil state of label, first distinguishing has reply or without reply, if there is reply, decode failure decides that collision, successfully decoded
Reply and collisionless are decided that；
Step S2：The signal processing module for increasing read write line is decoded into power to the tag return information that collides,
If directly taking the method for the value of scattered label Slotted Timer when colliding, occur as soon as and known currently without label
The phenomenon of time and Chu Lai not be wasted, it should which research is decoded into power when how to lift collision；
Step S3：Read write line signal processing module collide for label it is certain ability is successfully decoded before
Put, optimize multiple labels anti-collision handling process, delete order inefficient in multi-tag processing, the higher life of increase efficiency
The frequency of use of order, it is important with reference to the selection that changes into line command of the order to label time slot counter；
Step S4：Binding test experiment is to the continuous collision threshold being related in multiple labels anti-collision handling process and continuous sky
Not busy threshold value is configured.
As a kind of perferred technical scheme, the criterion of step S1 tag return state is whether there is back according to label
The significant difference of complex signal amplitude is formulated, and has been embedded in multi-tag handling process and will not be further added by extra processing time.
As a kind of perferred technical scheme, the decision method of the tag return state in step S1 is：
Step S11：Multi-tag reads flow and first sends Sort orders, and is skipped after Sort orders certainly without tag return
Order is sent from read write line to terminate to label to send the time T1 of response data, is gathered signal and is sought noise peak, this is made an uproar
The determinating reference value that sound peak value is made an inventory as the wheel；
Step S12：For other orders in multi-tag flow, time T1 is also skipped when gathering signal, calculates a timing
Interior signal peak, and compared with determinating reference value, both differences have been considered as reply more than noise peak, otherwise recognize
For without reply；
Step S13：The flow of judgement and the decoding process of multi-tag are parallel, and flow and the decoding process of judgement share
Gathered data；
Step S14：Have and distinguish whether the decoding algorithm for having collisionless to rely on signal processing module can solve in the case of replying
Code success, read write line can be successfully decoded and be considered as collisionless, otherwise it is assumed that collision causes signal skew too greatly can not successfully decoded.
As a kind of perferred technical scheme, can be variant using the reply power of each label in step S2, at signal
Reason module, which can extract, replys prominent label data.
As a kind of perferred technical scheme, QueryRep orders are substituted using Shrink orders in step S3, when continuous
Idle number is considered as single-wheel more than continuous Tidle threshold CIN and made an inventory completion, decides whether to send out Query again further according to situation.
As a kind of perferred technical scheme, the continuous collision threshold CCN to being related in multiple labels anti-collision handling process
Setting with continuous Tidle threshold CIN is with reference to specific multiple labels anti-collision test data.
As a kind of perferred technical scheme, in step S4 on the premise of test environment is consistent, with specific more
Labeling Study filters out the numerical value of continuous collision threshold CCN and continuous Tidle threshold CIN during multi-tag reading efficiency highest, and continuous
Continuous collision threshold CCN takes 2, and continuous Tidle threshold CIN takes 3.
As a kind of perferred technical scheme, the read write line is to meet military radio frequency identification air interface
(GJB7377.1-2011) read write line, read write line include interface module, MCU module, security module, FPGA module, DA
Modular converter, AD conversion module, radiating circuit module, receiving circuit module；Phase between the interface module and MCU module
Connect；The radiating circuit module and receiving circuit module are connected with antenna；Described MCU module be used to realizing MCU with it is outer
Portion communicates, and the data interaction with security module, is communicated with FPGA module；Described security module is used for according to algorithm for encryption label
Data；The FPGA module is used to realize the coding work for order of eating dishes without rice or wine and the decoding effort of label data, FPGA module control
AD and D/A conversion module；Described DA change-over circuits are that FPGA outputs eat dishes without rice or wine to be sent on radiating circuit after order conversion；Institute
AD conversion module is stated according to the echo in the sample frequency collection receiving circuit of the fixation multiple of echo frequency；The radiating circuit
Module is connected with DA change-over circuits, and the signal after modulation is carried out into power amplification, launched by antenna；The receiving circuit
Module is connected with antenna, receives label return signal from antenna, and launch and receive with same antenna；The antenna be responsible for by
Electromagnetic wave is sent to electronic tag, and electromagnetic wave is also received from space.
As a kind of perferred technical scheme, the MCU module controls the workflow of read write line, and basic procedure is as follows：
MCU module is according to the order of outside, into specific flow, allows FPGA module eat dishes without rice or wine the coding of order, after label response
FPGA module sends the label data parsed to MCU module, and MCU module is again added label data feeding security module
System close, that MCU module finally issues the data encrypted outside.
The invention has the advantages that：
1st, present invention is generally directed to military RFID reader, it is adapted to conform with military radio frequency identification air interface
(GJB7377.1-2011) read write line, work is optimized to the multi-tag handling process suggested in GJB7377.1-2011
Make.At the initial stage that the application of current military RFID reader is tried out also in pilot, embody the correlation technique of military read write line performance
Patent is also rarely found.
2nd, when two tag return information energies differ greatly, it is smaller that the method for the invention can effectively solve energy
Label the problem of being not easy to be identified to, avoid single-wheel from making an inventory the phenomenon for occurring omitting label.
3rd, the method for the invention does not require that the judgement to the recoil state of label is 100% accurate, there is fault-tolerance, and easily
Realize, the mark that wherein energy is maximum is completed with the advantage of signal processing algorithm if being collided under the applicable criterion of selection
The decoding of data is signed, this will be obviously improved the efficiency of multi-tag handling process.
4th, the method for the invention illustrates the implication of tag-collision again, if not having in theory in multi-tag handling process
There is collision to occur so reading efficiency highest, but the design principle of label time slot counter can not collision free, the present invention only will
The situation for colliding and decoding failure is referred in the handling process branch of collision.The space that signal processing algorithm makes progress,
Illustrating the effect of optimization of the method for the invention can also further be lifted, and embody very big Research Significance.
5th, realize and related Optimization Work is carried out to the characteristic of read write line, what Optimization Work was pursued is to read multi-tag
Efficiency, efficiency are mainly manifested in two aspects：On the one hand it is that make an inventory can be by all electronic tags in identification range all in a wheel
Read；On the other hand it is the speed of reading multi-tag within a certain period of time.
Brief description of the drawings
Accompanying drawing 1 is the multiple labels anti-collision process chart suggested in GJB7377.1-201.
Accompanying drawing 2 is the multiple labels anti-collision process chart after the optimization that the method for the invention refers to.
Accompanying drawing 3 is the core texture schematic diagram of read write line used in the embodiment of the present invention.
Accompanying drawing 4 is the block diagram of the main contents of the method for the invention.
Accompanying drawing 5 is handling principle description figure of the signal processing module that refers to of the method for the invention to collision alarm.
Embodiment
Embodiment provided by the invention is elaborated below in conjunction with the accompanying drawings.
The reference and part being related in accompanying drawing are as follows：
1. interface module 2.MCU modules
3. security module 4.FPGA modules
5.DA modular converter 6.AD modular converters
7. the receiving circuit module of radiating circuit module 8.
9. antenna
The implementation case based on read write line be our company research and development meet military radio frequency identification air interface
(GJB7377.1-2011) read write line, its core texture schematic diagram are as shown in Figure 3.Read write line is by interface module 1, MCU
Module 2, security module 3, FPGA module 4, D/A conversion module 5, AD conversion module 6, radiating circuit module 7, receiving circuit module 8
Deng composition.Radiating circuit module 7 and receiving circuit module 8 are connected with antenna 9.
Interface module 1：Interface circuit supports serial ports, USB port, the interface circuit such as network interface, according to read write line hardware with
Outside type of attachment and show as specific interface circuit, if it is desired to which military read write line is connected into the LAN specially set up, connect
Mouth circuit uses network port circuit.
MCU module 2：MCU module 2 is realized and outside communication, the data interaction with security module, with FPGA module 4
Communication.MCU module 2 controls the flow and mode of operation of read write line work, and the multi-tag handling process of read write line is exactly to read and write
One of flow of device work.MCU module 2, into specific flow, allows FPGA module 4 to carry out eating dishes without rice or wine to order according to the order of outside
The coding of order, FPGA module 4 sends the label data parsed to MCU module 2 after label response, and MCU module 2 is again by label
Data are sent into security module and are encrypted, the system that MCU module 2 finally issues the data encrypted outside.
Security module 3：In order to ensure the security of system, security module 3 is according to specific algorithm for encryption label data.
FPGA module 4：FPGA module 4 mainly realizes the coding work for order of eating dishes without rice or wine and the decoding effort of label data,
FPGA module 4 controls AD and DA circuit modules.FPGA module 4 is the key component of read write line signal transacting, side of the present invention
The signal processing module that method is mentioned to just is realized inside FPGA module 4.
D/A conversion module 5：D/A conversion module 5 is to be sent to radiating circuit after the order of eating dishes without rice or wine for exporting FPGA module 4 is changed
On.
AD conversion module 6：AD conversion module 6 is according in the sample frequency collection receiving circuit of the fixation multiple of echo frequency
Echo.
Radiating circuit module 7：It is connected with D/A conversion module 5, core is power amplifier, and the signal after modulation is carried out into power
Amplification, is launched by antenna.
Receiving circuit module 8：It is connected with antenna, label return signal is received from antenna.Transmitting and the same day of reception
Line.
Antenna 9：One antenna 9 of transmit-receive sharing, antenna 9 are responsible for electromagnetic wave being sent to electronic tag, also connect from space
Receive electromagnetic wave.
The present invention mainly proposes a kind of method for optimizing RFID reader multi-tag handling process.Methods described it is main
The block diagram of content is as shown in figure 4, be broadly divided into：Applicable criterion is set；Power is decoded into during lifting collision；Optimize anti-collision
Hit handling process；Continuous collision threshold and continuous Tidle threshold are corrected in experiment.Concrete implementation details is given below, for convenience of table
State, so that FM0 is encoded as an example, the reference clock cycle T of tag return signalpriFor 12.5us.
A kind of method for optimizing RFID reader multi-tag handling process, the described method comprises the following steps：
Step S1：Applicable criterion is set to military read write line, rationally judges that multi-tag reads electronics mark in scene
The recoil state of label, first distinguishing has reply or without reply, if there is reply, decode failure decides that collision, successfully decoded
Reply and collisionless are decided that.It is specific as follows：
1) applicable criterion is set：Applicable concept refers to match with the method for the invention, with other in Fig. 4
Content is complementary.Criterion has mainly distinguished tag return signal and without tag return signal, and whether collide by
The decoded result of the signal processing module of read write line determines.Often take turns multi-tag and read the transmission before Query orders are sent in flow
Sort orders, and certainly without tag return after Sort orders, Sort order transmissions start collection letter by the T1 times again after terminating
Number, and seek the average value S of all sampled points in the 125us times1And maximum sampled value S therein2, it is seen that noise peak Pn
For S2-S1, noise peak PnIt is the determinating reference value that the wheel is made an inventory；For other orders in multi-tag handling process, collection letter
Number when also circumvent the T1 times, and seek the average value S of all sampled points in the 125us times3And maximum sampled value S therein4,
Signal peak PsFor S4-S3, PsAnd PnDifference more than PnReply is considered as, otherwise it is assumed that without reply；To ensure the standard judged
True property, P before judgementnSize need with empirical value PNContrasted, PNThe receiving circuit of read write line under laboratory environment
Noise Acquisition value, P in theorynNot less than PN, PnLess than PNWhen need to use PNSubstitute Pn；Because the judgement stream that label signal whether there is
The decoding process of journey and multi-tag is parallel, and determination flow shares gathered data, embedded multi-tag flow with decoding process
In determination flow do not interfere with multi-tag reading efficiency；Being distinguished in the case of having reply has collisionless to rely on signal transacting mould
The decoding algorithm of block whether can successfully decoded, read write line can be successfully decoded and be considered as collisionless, otherwise it is assumed that collision causes signal
Deformation too greatly can not successfully decoded, the success rate decoded during so as to collide also influences the efficiency of multi-tag handling process.
Step S2：The signal processing module for increasing read write line is decoded into power to the tag return information that collides,
Can effectively raising efficiency, if directly taking the method for the value of scattered label Slotted Timer when colliding, just
Appearance is identified currently without label and wastes the phenomenon of time, it should successfully decoded when how research lifts collision
Rate.
It is specific as follows：2) it is decoded into power during lifting collision：During due to colliding, the reply power of each label has
Difference, signal processing module, which is possible to extract, replys prominent label data, even if collided, but because being decoded into
Work(can compress the consuming time of multi-tag handling process.It can be seen that the success rate decoded during lifting collision can effectively reduce more marks
The number that collides in label handling process, so as to the reading of all labels being rapidly completed in identification range.Synchronization is joined
With the number of tags of collision it is more few be advantageous to collision when decoding.In order to facilitate description, handled below with clear signal for Fig. 5
Handling principle of the module to collision alarm.
It is assumed that shown in part FM0 coded datas such as Fig. 5 (a) of tag return, such as Fig. 5 (b) is shown after shifting half of symbol,
It can be seen that signal is only made up of two kinds of functions as shown in Fig. 5 (c).Both functions are opposite, are properly termed as a pair of bases
Quasi-function, reference function constitute the signal after displacement.If two labels collide, signal is false after half code element shifts
The power for determining signal 1 is more than the power of signal 2, signal such as Fig. 5 (d) of collision rift, it is seen that the signal synthesized by collision rift
Shape is with the larger signal 1 of power, and thus equivalent to high-power signal is extracted out of collision rift signal, realization is decoded into
The possibility of work(.Certainly, this method is not limited to the collision of two labels, may apply to the collision of multiple labels.Collision
When can also complete the decoding of the maximum label data of wherein energy, it is possible to reduce branch is collided into multi-tag handling process
Probability, so as to realize the lifting for reading label efficiency.
Step S3：Read write line signal processing module collide for label it is certain ability is successfully decoded before
Put, optimize the multiple labels anti-collision handling process suggested in GJB7377.1-2011, delete inefficient in multi-tag processing
Order, the frequency of use of the higher order of increase efficiency.
Wherein, the multiple labels anti-collision handling process after optimization is as shown in Fig. 2 important reference is ordered to label slot count
The change of device value and enter the selection of line command, avoid time slot counter value mutation as far as possible.QueryRep is possible to certain label
Time slot counter value become 7FFF from 0h, it is unfavorable for time slot counter value and returns 0 again, it is possible to causes the label more in a wheel
Label is missed in making an inventory, and QueryRep is substituted using Shrink orders.In addition, continuous idle number is just recognized more than CIN in Fig. 2
Made an inventory completion for single-wheel, decide whether to send out Query again further according to situation.Compared to Figure 1 Fig. 2, eliminates QueryRep orders,
Condition into collision branch has made into be determined with failure is decoded after reply, and free branch is mainly based on Shrink orders, most
It is important that Fig. 2 multi-tag handling process is to coordinate above-mentioned signal processing module to propose the processing of collision alarm
's.
Step S4：Binding test experiment is to the continuous collision threshold being related in multiple labels anti-collision handling process and continuous sky
Not busy threshold value is configured.
Wherein, military radio frequency identification air interface has the typical case for stating continuous collision threshold CCN and continuous Tidle threshold CIN
Value, CCN and CIN can also influence the efficiency of multi-tag reading, it is necessary to according to actual test effect amendment CCN and CIN.
It is specific as follows：4) continuous collision threshold and continuous Tidle threshold are corrected in experiment：In military radio frequency identification air interface
In, scheme continuously continuous collision threshold CCN spans 1~10, representative value 3, continuous Tidle threshold CIN spans 1~6, allusion quotation
Offset is 4.The size of continuous continuous collision threshold CCN and continuous Tidle threshold CIN numerical value determine read write line jump out continuous collision and
At the time of continuous idle condition, continuous collision threshold CCN and continuous Tidle threshold CIN can also influence the efficiency of multi-tag reading,
Need the continuous collision threshold CCN and continuous Tidle threshold CIN of test effect amendment according to reality.It is consistent in test environment
On the premise of, continuous collision threshold CCN and continuous sky when selecting multi-tag reading efficiency highest with specific multi-tag testing sieve
Not busy threshold value CIN numerical value.By test of many times, continuous collision threshold CCN takes 2, when continuous Tidle threshold CIN takes 3, can make to adopt
Reach highest with the multi-tag reading efficiency of the RFID reader of the method for the invention.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, on the premise of the inventive method is not departed from, can also make some improvement and supplement, and these are improved and supplement also should be regarded as
Protection scope of the present invention.
Claims (9)
- A kind of 1. method for optimizing RFID reader multi-tag handling process, it is characterised in that the optimization RFID reader is more The method of tag processes flow includes：Step S1：Applicable criterion is set to military read write line, rationally judges that multi-tag reads electronic tag in scene Recoil state, first distinguishing has reply or without reply, if there is reply, decode failure decides that collision, and successfully decoded is just sentenced Surely there are reply and collisionless；Step S2：Increase be decoded into power of the signal processing module to the tag return information that collides of read write line, occur If directly taking the method for the value of scattered label Slotted Timer when collision, occur as soon as and be identified currently without label Come and waste the phenomenon of time, it should which research is decoded into power when how to lift collision；Step S3：Collided certain premise that ability is successfully decoded for label in the signal processing module of read write line Under, optimize multiple labels anti-collision handling process, delete order inefficient in multi-tag processing, the higher order of increase efficiency Frequency of use, emphasis is with reference to the selection that changes into line command of the order to label time slot counter；Step S4：Binding test experiment is to the continuous collision threshold being related in multiple labels anti-collision handling process and continuous idle threshold Value is configured.
- 2. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that step S1 Tag return state criterion be according to label whether there is return signal amplitude significant difference formulate, and insertion it is more Extra processing time will not be further added by tag processes flow.
- 3. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that step S1 In the decision method of tag return state be：Step S11：Multi-tag reads flow and first sends Sort orders, and is skipped after Sort orders certainly without tag return from reading Write device and send the time T1 that order end sends response data to label, gather signal and seek noise peak, by this noise peak The determinating reference value that value is made an inventory as the wheel；Step S12：For other orders in multi-tag flow, time T1 is also skipped when gathering signal, is calculated in certain time Signal peak, and compared with determinating reference value, both differences have been considered as reply more than noise peak, otherwise it is assumed that nothing Reply；Step S13：The flow of judgement and the decoding process of multi-tag are parallel, and flow and the decoding process of judgement share collection Data；Step S14：Have and distinguish whether the decoding algorithm for having collisionless to rely on signal processing module can be decoded into the case of replying Work(, read write line can be successfully decoded and be considered as collisionless, otherwise it is assumed that collision causes signal skew too greatly can not successfully decoded.
- 4. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that step S2 It is middle can be variant using the reply power of each label, signal processing module, which can extract, replys prominent number of tags According to.
- 5. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that step S3 It is middle to substitute QueryRep orders using Shrink orders, when continuous idle number is considered as single-wheel more than continuous Tidle threshold CIN Make an inventory completion, decide whether to send out Query again further according to situation.
- 6. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that to more marks The continuous collision threshold CCN and continuous Tidle threshold CIN that are related in label anticollision handling process setting are with reference to specific more marks Sign anticollision test data.
- 7. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that step S4 In on the premise of test environment is consistent, it is continuous when selecting multi-tag reading efficiency highest with specific multi-tag testing sieve Collision threshold CCN and continuous Tidle threshold CIN numerical value, and continuous collision threshold CCN takes 2, continuous Tidle threshold CIN takes 3.
- 8. the method for optimization RFID reader multi-tag handling process according to claim 1, it is characterised in that the reading It is the read write line for meeting military radio frequency identification air interface (GJB7377.1-2011) to write device, and read write line includes interface circuit mould Block, MCU module, security module, FPGA module, D/A conversion module, AD conversion module, radiating circuit module, receiving circuit module； It is connected with each other between the interface module and MCU module；The radiating circuit module and receiving circuit module connect with antenna Connect；Described MCU module is used to realize MCU module and PERCOM peripheral communication, the data interaction with security module, leads to FPGA module Letter；Described security module is used for according to algorithm for encryption label data；The FPGA module is used for the coding for realizing order of eating dishes without rice or wine Work and the decoding effort of label data, FPGA module control AD conversion module and D/A conversion module；Described DA change-over circuits It is that FPGA outputs eat dishes without rice or wine to be sent on radiating circuit after order conversion；The AD conversion module according to echo frequency fixation times Echo in several sample frequency collection receiving circuits；The radiating circuit module is connected with DA change-over circuits, after modulation Signal carries out power amplification, is launched by antenna；The receiving circuit module is connected with antenna, and receiving label from antenna returns Letter in reply number, and launch and receive with same antenna；The antenna is responsible for electromagnetic wave being sent to electronic tag, also from space Receive electromagnetic wave.
- 9. the method for optimization RFID reader multi-tag handling process according to claim 8, it is characterised in that described MCU module controls the workflow of read write line, and basic procedure is as follows：MCU module flows according to the order of outside into specific Journey, FPGA module is allowed eat dishes without rice or wine the coding of order, FPGA module sends the label data parsed to MCU after label response Label data feeding security module is encrypted again for module, MCU module, and MCU module finally issues the data encrypted outer The system in portion.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108108644A (en) * | 2017-12-27 | 2018-06-01 | 山东大学 | A kind of Paper Management System and its method of work based on RFID technique |
| CN113971412A (en) * | 2021-11-05 | 2022-01-25 | 中国人民解放军国防科技大学 | Error correction method based on RFID (radio frequency identification device) middle and long distance running timing system |
| CN116805232A (en) * | 2023-08-24 | 2023-09-26 | 广东中世发智能科技股份有限公司 | RFID-based intelligent comprehensive material management method, system and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013465A (en) * | 2007-02-08 | 2007-08-08 | 深圳市当代通信技术有限公司 | Multi-label anti-collision algorithm in ultrahigh frequency remote auto-recognition system |
| CN105184342A (en) * | 2015-10-10 | 2015-12-23 | 中交北斗技术有限责任公司 | Improved UHF-RFID multi-tag anti-collision tree algorithm and application thereof |
| CN106355128A (en) * | 2016-10-26 | 2017-01-25 | 深圳市航天华拓科技有限公司 | RFID multi-label anti-collision method based on binary-tree algorithm |
-
2017
- 2017-08-18 CN CN201710712631.XA patent/CN107506675B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013465A (en) * | 2007-02-08 | 2007-08-08 | 深圳市当代通信技术有限公司 | Multi-label anti-collision algorithm in ultrahigh frequency remote auto-recognition system |
| CN105184342A (en) * | 2015-10-10 | 2015-12-23 | 中交北斗技术有限责任公司 | Improved UHF-RFID multi-tag anti-collision tree algorithm and application thereof |
| CN106355128A (en) * | 2016-10-26 | 2017-01-25 | 深圳市航天华拓科技有限公司 | RFID multi-label anti-collision method based on binary-tree algorithm |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108108644A (en) * | 2017-12-27 | 2018-06-01 | 山东大学 | A kind of Paper Management System and its method of work based on RFID technique |
| CN113971412A (en) * | 2021-11-05 | 2022-01-25 | 中国人民解放军国防科技大学 | Error correction method based on RFID (radio frequency identification device) middle and long distance running timing system |
| CN113971412B (en) * | 2021-11-05 | 2024-05-10 | 中国人民解放军国防科技大学 | Error correction method based on RFID medium-long distance running timing system |
| CN116805232A (en) * | 2023-08-24 | 2023-09-26 | 广东中世发智能科技股份有限公司 | RFID-based intelligent comprehensive material management method, system and storage medium |
| CN116805232B (en) * | 2023-08-24 | 2023-11-10 | 广东中世发智能科技股份有限公司 | RFID-based intelligent comprehensive material management method, system and storage medium |
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