CN107832649A - A kind of label technique for taking inventory and equipment - Google Patents
A kind of label technique for taking inventory and equipment Download PDFInfo
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- CN107832649A CN107832649A CN201711071218.6A CN201711071218A CN107832649A CN 107832649 A CN107832649 A CN 107832649A CN 201711071218 A CN201711071218 A CN 201711071218A CN 107832649 A CN107832649 A CN 107832649A
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- rfid reader
- frequency
- coded system
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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
- G06K7/10198—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 setting parameters for the interrogator, e.g. programming parameters and operating modes
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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
- G06K7/10297—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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
Abstract
The invention discloses a kind of label technique for taking inventory and equipment, the efficiency taken inventory for improving label.This method includes：Radio frequency discrimination RFID read write line is switched to the second mode of operation when carrying out frequency hopping, by the first current mode of operation；Wherein, for the RFID reader in different working modes, the information for being used to set feedback velocity that the querying command of transmission includes is different, and the feedback velocity is the speed that label sends data to the RFID reader；The RFID reader carries out taking inventory for the label by second mode of operation, to obtain the numberings of the electric product coding EPC in the label.
Description
Technical field
The present invention relates to radio frequency identification (Radio Frequency Identification, RFID) technical field, especially
It is related to a kind of label technique for taking inventory and equipment.
Background technology
At present, traditional paper tape bar code is because its storage capacity is small and the shortcomings of can not rewrite, thus gradually by RFID
Technology is substituted.Wherein, a RFID reader and multiple electronic tags are generally included using the RFID system of RFID technique,
RFID reader to electronic tag by sending reading order, with the electric product coding in reading electronic labels
(Electronic Product Code, EPC) is numbered, and carries out the information of the article according to corresponding to EPC numbers acquisition label, example
Such as information can be the category of article, placement location.
Wherein, in order to not allow same RFID products to occupy a frequency for a long time, and other neighbouring RFID products are caused
It can not be communicated by the frequency, therefore, radio control part all regulation RFID products, which take a frequency, has one most
For a long time, therefore, existing RFID products are usually using frequency hopping (Frequency-Hopping Spread Spectrum；
FHSS) technology, the frequency used in the RFID product courses of work is constantly switched.But during frequency hopping, it is usually present pass
Close radio-frequency carrier and open the process of radio-frequency carrier, and need the consumption regular hour can not enter row label disk in this process
Deposit so that label is taken inventory inefficient.Also, RFID products are generally when the distance that can read label is lifted, RFID productions
The reading rate of product is smaller；When the reading rate of RFID products is larger, RFID products can read the distance of label then
Limitation, if want to carry out most fast reading rate pattern and farthest read the switching of distance mode in the prior art, it is also necessary to
The extra consumption regular hour so that the efficiency that label is taken inventory further reduces.
The content of the invention
The embodiment of the present invention provides a kind of label technique for taking inventory and equipment, the efficiency taken inventory for improving label.
First aspect, there is provided a kind of label technique for taking inventory, this method include：
Radio frequency discrimination RFID read write line is switched to the second Working mould when carrying out frequency hopping, by the first current mode of operation
Formula；Wherein, the RFID reader is in different working modes, and what the querying command of transmission included is used to set feedback velocity
Information it is different, the feedback velocity is the speed that label sends data to the RFID reader；
The RFID reader carries out taking inventory for the label by second mode of operation, to obtain in the label
Electric product coding EPC numbering.
Optionally, the RFID reader carries out frequency hopping, including：
When the RFID reader by the first mode of operation take inventory the EPC numberings of the label of reading and the number of label
When amount does not change, the RFID reader carries out frequency hopping.
Optionally, the RFID reader carries out frequency hopping, including：
When feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation,
The RFID reader frequency hopping to remote frequency, wherein, the remote frequency is that the distance that can read label is not less than
The frequency of pre-determined distance threshold value；
Or speed is fed back corresponding to second mode of operation when feedback velocity corresponding to first mode of operation is less than
During rate, RFID reader frequency hopping frequency to the remote frequency or closely, wherein, the closely frequency is energy
The distance for enough reading label is less than the frequency of pre-determined distance threshold value.
Optionally, the querying command also includes being used for the information for setting coded system, wherein, different coding mode is corresponding
The distance that can read label it is different；
When feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation,
Coded system corresponding to the querying command that the RFID reader is sent in second mode of operation is remote coded system；
Wherein, the coded system is the coded system that label sends data use to the RFID reader；The remote coding
Mode is that can read coded system of the distance not less than pre-determined distance threshold value of label；
Or speed is fed back corresponding to second mode of operation when feedback velocity corresponding to first mode of operation is less than
During rate, coded system corresponding to the querying command that the RFID reader is sent in second mode of operation is remote coding
Mode or closely coded system, the closely coded system are that the distance that can read label is less than pre-determined distance threshold value
Coded system.
Optionally, the value of the transmission rate of the RFID reader is the maximum in the first scope, wherein, described the
One scope is to be determined according to the feedback velocity, and the transmission rate of the RFID reader sends for the RFID reader to be looked into
Ask the speed of order or reading order.
Optionally, after the RFID reader carries out by second mode of operation taking inventory of the label, institute
Stating method also includes：
When the RFID reader by the second mode of operation take inventory the EPC numberings of the label of reading and the number of label
When amount does not change, the RFID reader carries out frequency hopping, and is switched to first Working mould from second mode of operation
Formula；
The RFID reader carries out taking inventory for the label by first mode of operation.
Second aspect, there is provided a kind of label takes inventory equipment, and the equipment includes：
Switch unit, for when label takes inventory equipment and carrying out frequency hopping, the first current mode of operation to be switched into
Two mode of operations；Wherein, the RFID reader is in different working modes, and what the querying command of transmission included is used to set
The information of feedback velocity is different, and the feedback velocity is the speed that label sends data to the RFID reader；
Unit is taken inventory, for carrying out taking inventory for the label by second mode of operation, to obtain in the label
EPC numbering.
Optionally, the label, which takes inventory equipment, also includes frequency hopping unit；
The frequency hopping unit, for when the RFID reader by the first mode of operation take inventory the label of reading
When EPC is numbered and the quantity of label does not change, frequency hopping is carried out.
Optionally, the frequency hopping unit is specifically used for：
When feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation,
The RFID reader frequency hopping to remote frequency, wherein, the remote frequency is that the distance that can read label is not less than
The frequency of pre-determined distance threshold value；
Or speed is fed back corresponding to second mode of operation when feedback velocity corresponding to first mode of operation is less than
During rate, RFID reader frequency hopping frequency to the remote frequency or closely, wherein, the closely frequency is energy
The distance for enough reading label is less than the frequency of pre-determined distance threshold value.
Optionally, the querying command also includes being used for the information for setting coded system, wherein, different coding mode is corresponding
The distance that can read label it is different；
When feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation,
Coded system corresponding to the querying command that the RFID reader is sent in second mode of operation is remote coded system；
Wherein, the coded system is the coded system that label sends data use to the RFID reader；The remote coding
Mode is that can read coded system of the distance not less than pre-determined distance threshold value of label；
Or speed is fed back corresponding to second mode of operation when feedback velocity corresponding to first mode of operation is less than
During rate, coded system corresponding to the querying command that the RFID reader is sent in second mode of operation is remote coding
Mode or closely coded system, the closely coded system are that the distance that can read label is less than pre-determined distance threshold value
Coded system.
Optionally, the value that the label takes inventory the transmission rate of equipment is the maximum in the first scope, wherein, it is described
First scope is to be determined according to the feedback velocity, and the transmission rate of the RFID reader sends for the RFID reader
The speed of querying command or reading order.
Optionally,
The switch unit is additionally operable to, when the RFID reader by the second mode of operation take inventory the label of reading
EPC numberings and the quantity of label when not changing, the RFID reader carries out frequency hopping, and is cut from second mode of operation
Change to first mode of operation；
The unit of taking inventory is additionally operable to, and the RFID reader carries out the disk of the label by first mode of operation
Deposit.
The third aspect, there is provided a kind of computer installation, described device include at least one processor, and the processor is used for
The step of label technique for taking inventory such as first aspect offer is realized when performing the computer program stored in memory.
Fourth aspect, there is provided a kind of computer-readable recording medium, be stored thereon with computer program, the computer journey
The step of label technique for taking inventory such as first aspect offer is realized when sequence is executed by processor.
In embodiments of the present invention, while RFID reader carries out frequency hopping, the switching of pattern is operated, wherein,
In different working modes, label is different to the speed of RFID reader feedback data, and then causes in different working modes
The reading rate of RFID reader is different.It can be seen that making full use of the time of frequency hopping in the embodiment of the present invention, while it is operated mould
The switching of formula so that the time of consumption is reduced required for taking inventory, and then improves the efficiency taken inventory.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, it will make below to required in the embodiment of the present invention
Accompanying drawing is briefly described, it should be apparent that, accompanying drawing described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is application scenario diagram provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of label technique for taking inventory provided in an embodiment of the present invention；
Fig. 3 is the schematic flow sheet of label technique for taking inventory implementation procedure provided in an embodiment of the present invention；
Fig. 4 be a kind of switching working mode provided in an embodiment of the present invention before and after feedback velocity contrast schematic diagram；
Fig. 5 is a kind of structural representation that label provided in an embodiment of the present invention takes inventory equipment；
Fig. 6 is a kind of structural representation of computer installation provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.
The technical background of the embodiment of the present invention is described below.
At present, during frequency hopping, the process closed radio-frequency carrier and open radio-frequency carrier is usually present, and at this
Process, which needs to consume the regular hour, can not enter row label and take inventory so that label is taken inventory inefficient.Also, RFID products lead to
Often when the distance that can read label is lifted, the reading rate of RFID products is smaller；When the reading rate of RFID products is larger
When, the distance that RFID products can read label has then limited, if wanting to carry out most fast reading rate mould in the prior art
During the switching of formula and farthest reading distance mode, it is also necessary to consume the extra time so that the efficiency that label is taken inventory further drops
It is low.
In consideration of it, the embodiment of the present invention provides a kind of label technique for taking inventory, in the method, jumped in RFID reader
While frequency, the switching of pattern is operated, wherein, in different working modes, label is to RFID reader feedback data
Speed is different, and then make it that the reading rate of the RFID reader in different working modes is different.It can be seen that in the embodiment of the present invention
The time of frequency hopping is made full use of, while is operated the switching of pattern so that the time of consumption is reduced required for taking inventory, Jin Erti
The high efficiency taken inventory.
Fig. 1 is referred to, is application scenario diagram provided in an embodiment of the present invention.Wherein, wrapped in RFID reader and label
The antenna for communication is included, forward link is the communication link that RFID reader sends data to label, and reverse link is label
The communication link of data is sent to RFID reader.Herein it is to be understood that, in Fig. 1, only to include the field of a label
Exemplified by scape, but in actual applications, more labels can also be included, the embodiment of the present invention is without limitation.
Technical scheme provided in an embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Fig. 2 is referred to, one embodiment of the invention provides a kind of label technique for taking inventory.This method includes：
Step 201：Radio frequency discrimination RFID read write line is switched to second when carrying out frequency hopping, by the first current mode of operation
Mode of operation；Wherein, for RFID reader in different working modes, speed is fed back in the setting that is used for that the querying command of transmission includes
The information of rate is different, and feedback velocity is the speed that label sends data to RFID reader.
Step 202：RFID reader enters taking inventory for row label by the second mode of operation, to obtain in the label
EPC is numbered.
In the embodiment of the present invention, label each means the electronic tag in RFID system.Specifically, label can be passive mark
Sign (Passive tags) or active label (Active tags).Wherein, the life that passive label is sent by RFID reader
Order and carrier wave provide the energy of work for it；Active label carries energy source inside it, and work is provided for it without RFID reader
Make energy.
In the embodiment of the present invention, RFID reader can include at least two mode of operations, the first mode of operation and second
Mode of operation can be any two kinds of different mode of operations at least two mode of operations.Wherein, at least two Working mould
Feedback velocity corresponding to any two kinds of mode of operations is all different in formula.Such as RFID reader can include the first mode of operation and
Second mode of operation, wherein, feedback velocity corresponding to the first mode of operation is more than feedback velocity corresponding to the second mode of operation；Or
Person, the feedback velocity of the first mode of operation are less than feedback velocity corresponding to the second mode of operation.
In the embodiment of the present invention, when being operated in different frequent points due to RFID reader, RFID reader can read label
Distance it is also different, so as to RFID reader work frequency can be divided into remote frequency and closely frequency, its
In, remote frequency is frequency of the distance not less than pre-determined distance threshold value that can read label, and closely frequency is to read
The distance of label is taken to be less than the frequency of pre-determined distance threshold value.Pre-determined distance threshold value can be rule of thumb configured；Or root
It is configured according to test result.
Specifically, when feedback velocity corresponding to the first mode of operation is more than feedback velocity corresponding to the second mode of operation,
So RFID reader when carrying out frequency hopping, then can preferentially frequency hopping is to remote frequency, to read more remote label,
That is bound equivalent to by the slower mode of operation of feedback velocity with remote frequency.
When feedback velocity corresponding to the first mode of operation is less than feedback velocity corresponding to the second mode of operation, due to second
The feedback velocity of mode of operation is very fast, that is, is used to read most of label closer to the distance, the mark that can be read for frequency
The distance of label need not be limited, then RFID reader, then can be with frequency hopping to remote frequency or near when carrying out frequency hopping
All may be used apart from frequency.
In actual applications, the frequency range used in RFID reader can pass through generally in the range of 920MHz~925MHz
Measure the substantially reading distance of the frequency in the range of this.Specifically, during test, multiple labels can be arranged on RFID
In the range of read write line different distance, the inventory procedure of row label is then entered by different frequencies, and record the mark for taking inventory reading
The quantity of label, the distance of label can be finally read according to how much determination different frequent points of tag reader quantity.In general, read
The most frequency of access amount is to read apart from farthest frequency, such as maximum distance frequency can be the frequency that frequency is 920MHz
Point.So, when being switched to the slower mode of operation of feedback velocity, then can preferentially frequency hopping to reading the frequency of tag distances farther out
Point, that is to say, that bound equivalent to by the slower mode of operation of feedback velocity with remote frequency, be switched to feedback speed
During the slower mode of operation of rate, frequency hopping also preferentially jumps to remote frequency, so that RFID reader read it is more remote
Label when it is more effective.
In the embodiment of the present invention, during the coded system difference configured when due to RFID reader being label returned data,
The distance that RFID reader can read label is also different, i.e., coded system can also be divided into remote coded system and
Closely coded system.Wherein, remote coded system is that can read volume of the distance not less than pre-determined distance threshold value of label
Code mode, closely coded system is that can read coded system of the distance less than pre-determined distance threshold value of label.Wherein, encode
Mode is that label is being taken inventory in the cycle corresponding to querying command to the coded system of RFID reader returned data use.
Specifically, when feedback velocity corresponding to the first mode of operation is more than feedback velocity corresponding to the second mode of operation,
Coded system corresponding to the querying command that RFID reader is sent in the second mode of operation is preferably remote coded system, that is, is existed
Can also be preferably that label configuration enables to read apart from farther when being switched to the second mode of operation from the first mode of operation
Coded system.Wherein, the information for setting coded system can be carried in querying command, then, RFID reader is
Coded system corresponding to the querying command that two mode of operations are sent can read the distance of label, can be more than the first Working mould
Coded system corresponding to the querying command that formula is sent can read the distance of label.
When feedback velocity corresponding to the first mode of operation is less than feedback velocity corresponding to the second mode of operation, due to second
The feedback velocity of mode of operation is very fast, that is, is used to read most of label closer to the distance, the mark that can be read for frequency
The distance of label need not be limited, then coded system corresponding to the querying command that RFID reader is sent in the second mode of operation
Can be remote coded system or closely coded system.
In actual applications, can also be by measuring the substantially reading distance of different coding mode.Specifically, test
When, multiple labels can be arranged in the range of RFID reader different distance, be sent when carrying out inventory procedure to label
Set coded system is different in querying command, and records the quantity for the label for taking inventory reading, finally according to tag reader number
How much determination different coding modes of amount can read the distance of label.In general, the at most corresponding volume of number of labels is read
Code mode is to read apart from farthest coded system.For example, presently the most conventional coded system be FM0, Miller2,
These four coded systems of Miller4, Miller8, the sequence of the distance of label can be read by the coded system measured
For Miller4 ＞ Miller8 ＞ Miller2 ＞ FM0.So, when being switched to the slower mode of operation of feedback velocity, then RFID
Read write line is that the coded system of label configuration can be Miller4, that is to say, that equivalent to by the slower Working mould of feedback velocity
Formula is bound apart from farther coded system with reading, and is preferably mark when being switched to the slower mode of operation of feedback velocity
Label configuration enables to RFID reader to read apart from farther coded system, so that RFID reader is being read compared with long distance
From label when it is more effective.
Certainly, for different RFID products, remote frequency corresponding to it and read apart from farther coded system not
Together, specifically also need to carry out actual setting with reference to different RFID products.For example, the frequency range used of another RFID reader can
Think 860~930MHz, the remote frequency measured by test can include 902.75MHz, and the RFID reader for
When the coded system of label configuration is Miller8 so that the distance that the RFID reader is read is farthest, then the RFID reader
When being switched to the slower mode of operation of feedback velocity, then can preferentially frequency hopping is to 902.75MHz, and the coding for label configuration
Mode is Miller8.
Fig. 3 is referred to, is the schematic flow sheet of label technique for taking inventory implementation procedure provided in an embodiment of the present invention.Need
State, be specifically that the first mode of operation and the second mode of operation, and the first mode of operation are included with RFID reader in Fig. 3
The scheme of the embodiment of the present invention is described more than exemplified by feedback velocity corresponding to the second mode of operation for corresponding feedback velocity
's.Certainly, it is corresponding more than the second mode of operation to be not limited to feedback velocity corresponding to the first mode of operation for the embodiment of the present invention
Feedback velocity or the first mode of operation corresponding to feedback velocity be less than feedback velocity corresponding to the second mode of operation,
In view of the execution flow of two kinds of situations is similar, therefore subsequently it is less than the second work for feedback velocity corresponding to the first mode of operation
The execution flow of feedback velocity corresponding to pattern is no longer repeated.
S301：RFID reader by the first mode of operation take inventory label.
In the embodiment of the present invention, RFID reader by the first mode of operation can take inventory label first.Its
In, RFID reader can include at least two mode of operations, when RFID reader is in different working modes, RFID reader
Feedback velocity for label configuration is different.
Specifically, when RFID reader is taken inventory, RFID reader is ordered firstly the need of an inquiry (Query) is sent
Order, wherein, now RFID reader be not aware that around existing label altogether quantity, therefore the querying command is to the RFID
Read write line surrounding broadcast transmission, after the label around RFID reader receives the querying command, then it can be ordered according to inquiry
The random number is simultaneously returned to RFID reader by order one random number of generation.
Wherein, the information for being used to set the feedback velocity of label can be included in querying command, feedback velocity is that label exists
The speed for sending data in the cycle to RFID reader is taken inventory corresponding to the querying command, then, due to now RFID reader
In the first mode of operation, then the feedback velocity that the querying command now sent is set is anti-corresponding to the first mode of operation
Present speed.After label receives querying command, then what can be included according to querying command is used to set the letter of feedback velocity
Breath is determined to feedback velocity during RFID reader returned data, and is returning to the data for needing to feed back by the feedback velocity,
The data for example can include random number and EPC is numbered.
In the embodiment of the present invention, the Query orders that RFID reader is sent can include Q value informations, and Q value informations are used to refer to
Indicating label that take inventory the cycle return random number, a Q value correspond to this 2QIt is individual to take inventory the cycle.Label receives Query orders
And after obtaining Q values, last Q positions can be taken out from the binary stored value of the random number of itself, and determine label at which
Take inventory cycle return random number.Such as：Current Q values are 4, and label random number binary stored value is
" 0011010110100010 ", last Q=4 positions are " 0010 ", then label takes inventory cycle return random number at the 2nd.Wherein, Q
The setting of value may be such that 2QClose to value corresponding to number of tags to be taken inventory.Wherein, 2QIt is individual to take inventory in the cycle, first
The order of taking inventory that cycle sends uses Query orders, and it includes Q value informations, as open disk cycle of deposit, and below 2Q- 1
Taking inventory taking inventory during order is ordered using repetition inquiry (QueryRep) for cycle transmission no longer includes Q value informations.If send out before
Query orders are passed through, if follow-up also need to change Q values, then then need to open new 2QIt is individual to take inventory the cycle, and looked into by adjustment
Ask (QueryAdjust) order and send amended Q values, QueryAdjust orders include the information of new Q value changes amounts, example
Such as can be Q=Q+1, or Q=Q-1, it is, of course, also possible to be that Q values keep constant.
The cycle is taken inventory what each successful collection to a label E PC was numbered, RFID reader takes inventory life in transmission
After order, then it can receive label and return to random number, RFID reader sends to the label for returning to random number include the random number again
Response, and then the EPC numberings of label return can received and CRC (Cyclic is carried out to the numbering
Redundancy Check, CRC) verification.
It is of course also possible to there is a situation where can not successful collection to label E PC number, in this case, RFID reader
Generally after order is taken inventory in transmission, the random number of label return is not normally received；Or RFID reader receives mark
The random number returned is signed, and the response for including the random number is sent to label, but the EPC for not being normally received label return is compiled
Number；Or RFID reader receives the EPC that label returns and numbered, but the CRC check mistake of the numbering, then RFID is read
Writing device then needs to send negative response (Negative Acknowledgment, NAK) order to label.Due to the above situation
In the presence of, for label take inventory usually require by repeatedly undergo it is above-mentioned it is multiple take inventory the cycle, to obtain multiple marks to be taken inventory
The EPC numberings of label.
S302：RFID reader is jumped when that can not read the EPC numberings of more multi-tag by the first mode of operation
Frequently, and while frequency hopping, the second mode of operation is switched to from the first mode of operation.
In the embodiment of the present invention, after being taken inventory by the first mode of operation, due to corresponding to the first mode of operation
Feedback velocity is more than feedback velocity corresponding to the second mode of operation, and when feedback velocity is larger, RFID reader can be read
Label distance it is limited, therefore reading that can be quickly by the first mode of operation is completed the first mode of operation and can read
Label, but being likely present some distant labels can not be read out by the first mode of operation.Therefore,
When that can not read the EPC numberings of more multi-tag by the first mode of operation, RFID reader can then switch RFID reader
To the mode of operation that can read more remote label, i.e. the second smaller mode of operation of feedback velocity.Wherein, RFID read-write
Can be RFID reader the 2 of current Q values when device does not obtain the EPC numberings of new labelQIndividual take inventory in the cycle is not all read
New EPC is taken to number；Either repeatedly the 2 of current Q valuesQIndividual take inventory in the cycle is all numbered without the new EPC of reading.
In the embodiment of the present invention, RFID reader is numbered in the EPC that more multi-tag can not be read by the first mode of operation
When, then frequency hopping can be carried out, and while frequency hopping, RFID reader can also be switched to from the first current mode of operation
Second mode of operation.Wherein, in the RFID reader course of work, the time that frequency hopping is consumed is unavoidable, therefore is
Save and take inventory the consumed time, can be operated the switching of pattern using the process of frequency hopping.Specifically, due to work
The opportunity of pattern switching can be numbered in RFID reader in the EPC that more multi-tag can not be read by the first mode of operation
When, then the opportunity for carrying out frequency hopping can also be when that can not read the EPC numberings of more multi-tag by the first mode of operation.
S303：RFID reader by the second mode of operation take inventory label.
In the embodiment of the present invention, RFID reader is switched to after the second mode of operation, because the second mode of operation is mark
It is smaller to sign the feedback velocity of configuration, corresponding, the distance that RFID reader can read label then can be bigger, then RFID is read
More remote label can be read by writing device.Fig. 4 is referred to, to switch front and rear feedback velocity contrast schematic diagram.Wherein it is possible to
See, faster, and the feedback velocity in the second mode of operation is smaller for the feedback velocity in the first mode of operation.
Specifically, the flow that RFID reader is taken inventory by the second mode of operation is carried out with passing through the first mode of operation
The flow taken inventory is identical, therefore to the description that the flow is referred to be taken inventory above by the first mode of operation, herein not
Repeat again.
S304：RFID reader determines whether that stopping label making an inventory.
S305：Result is determined as when being, RFID reader end-tag is made an inventory.
In the embodiment of the present invention, after by the second mode of operation, then progress may be numbered to the EPC of all labels
Read, that is, complete label and make an inventory, then then RFID reader can stop label and make an inventory work；Or RFID reader
Shutdown command or halt instruction of operating personnel etc. are have received, RFID reader can also stop label and make an inventory.
S306：Determine result for it is no when, and more multi-tag can not be read by the second mode of operation in RFID reader
During EPC numberings, RFID reader carries out frequency hopping, and while frequency hopping, the first mode of operation is switched to from the second mode of operation.
In the embodiment of the present invention, when RFID reader passes through reading of the second mode of operation completion to more remote label
Afterwards, then after RFID reader completes the taking inventory of all labels that can be read to the RFID reader, i.e. RFID
When read write line can not read the EPC numberings of more multi-tag by the second mode of operation, RFID reader can then continue to jump
Frequently, while frequency hopping, the switching of pattern can also be operated, i.e., is switched to the first mode of operation from the second mode of operation,
And row label is entered by the first mode of operation and taken inventory.For example, when RFID reader includes two kinds of mode of operations, jumped each time
During frequency, then it can switch one action pattern, i.e., it is quick by faster first mode of operation of feedback velocity in RFID reader
Ground is read around RFID reader after most label, then can carry out frequency hopping, at the same be switched to feedback velocity it is relatively slow but
Read apart from the second farther mode of operation, to read more remote label, after the completion of more remote tag reader,
Frequency hopping can be carried out again, while is switched to the first mode of operation, read the label for newly entering RFID reader read range.Such as
After the completion of streamline last consignment of tag reader, the reading of next group label is carried out.By using the process of frequency hopping, work is carried out
The switching of operation mode, so, then more save the time of consumption needed for taking inventory.
In the embodiment of the present invention, the value of the transmission rate of RFID reader is the maximum in the first scope, wherein, the
One scope is to be determined according to feedback velocity, and the transmission rate of RFID reader sends querying command or reading for RFID reader
Take the speed of order.
Specifically, feedback velocity is backward chaining speed (Backscatter Link Frequency, BLF), that is,
Certain restriction be present with backward chaining speed and close in label to speed during RFID reader transmission data, forward chaining speed
System, i.e., forward chaining speed may be only configured to the value in the range of backward chaining speed can allow, then when backward chaining speed
When rate determines, the span of forward chaining speed can then determine accordingly.
In order to which that further improves RFID reader takes inventory efficiency, the transmission rate of RFID reader can be arranged to
Maximum in one scope.Wherein, transmission rate is forward chaining speed, that is, RFID reader sends data to label
When speed.In actual applications, for the forward link of passive label, play influence to reading distance is to label
Radio frequency charging effect, wherein major influence factors are the dutycycle and carrying data that RFID reader sends data to label
Carrier wave, therefore the reading distance that forward chaining speed can't be to label has an impact, then then can be by forward chaining speed
It is arranged to maximum, to lift the efficiency of taking inventory of RFID reader, especially in the second mode of operation, feedback velocity is smaller, now
Corresponding forward chaining speed is arranged to very little without corresponding, i.e., it is in the first scope that can also keep forward chaining speed
Maximum.
For example, when the backward chaining speed when the second mode of operation is 250kHz, according to relation formula TRcal=DR/
BLF≤3RTcal, wherein, RTcal is forward link calibration symbol, and TRcal is accorded with for Reverse Link Calibration, and DR value is only
64/3 or 8, to improve forward chaining speed, then it must reduce RTcal, TRcal, then and DR then needs to select minimum value,
That is DR is 8, then can obtain TRcal=8/250kHz=32us.In this case, RTcal could be arranged to optional scope
In minimum value, i.e. 18.75us, i.e., now meet TRcal=32us<3RTcal=3*18.75us.RTcal=18.75us pairs
Time reference (the Tari)=6.25us answered, time reference are used to characterize in the radiofrequency signal sent 0 time span, now just
Maximum can be obtained to link speed.It can be seen that forward chaining speed in the second mode of operation is it can also be provided that larger,
So that taking inventory for RFID reader is more efficient.
In summary, in embodiments of the present invention, while RFID reader carries out frequency hopping, it is operated cutting for pattern
Change, wherein, in different working modes, label is different to the speed of RFID reader feedback data, and then causes in different works
The reading rate of RFID reader is different during operation mode.It can be seen that making full use of the time of frequency hopping in the embodiment of the present invention, enter simultaneously
The switching of row mode of operation so that the time of consumption is reduced required for taking inventory, and then improves the efficiency taken inventory.
Fig. 5 is referred to, based on same inventive concept, one embodiment of the invention provides a kind of label and takes inventory equipment 50, and this sets
It is standby to include：
Switch unit 501, for when label takes inventory equipment and carrying out frequency hopping, the first current mode of operation to be switched to
Second mode of operation；Wherein, RFID reader is in different working modes, and what the querying command of transmission included is used to set anti-
It is different to present the information of speed, feedback velocity is the speed that label sends data to RFID reader；
Unit 502 is taken inventory, for entering taking inventory for row label by the second mode of operation, to obtain the numberings of the EPC in label.
Optionally, label, which takes inventory equipment, also includes frequency hopping unit 503；
Frequency hopping unit 503, compiled for by the first mode of operation take inventory the EPC of label of reading when RFID reader
Number and the quantity of label when not changing, carry out frequency hopping.
Optionally, frequency hopping unit 503 is specifically used for：
When feedback velocity corresponding to the first mode of operation is more than feedback velocity corresponding to the second mode of operation, RFID read-write
Device frequency hopping to remote frequency, wherein, remote frequency be can read label distance be not less than pre-determined distance threshold value frequency
Point；
Or when feedback velocity corresponding to the first mode of operation is less than feedback velocity corresponding to the second mode of operation,
RFID reader frequency hopping frequency to remote frequency or closely, wherein, closely frequency is the distance that can read label
Less than the frequency of pre-determined distance threshold value.
Optionally, querying command also includes being used for the information for setting coded system, wherein, energy corresponding to different coding mode
The distance for enough reading label is different；
When feedback velocity corresponding to the first mode of operation is more than feedback velocity corresponding to the second mode of operation, RFID read-write
Coded system corresponding to the querying command that device is sent in the second mode of operation is remote coded system；Wherein, coded system is
Label sends the coded system of data use to RFID reader；Remote coded system is not small for that can read the distance of label
In the coded system of pre-determined distance threshold value；
Or when feedback velocity corresponding to the first mode of operation is less than feedback velocity corresponding to the second mode of operation,
Coded system corresponding to the querying command that RFID reader is sent in the second mode of operation is remote coded system or low coverage
From coded system, closely coded system is that can read coded system of the distance less than pre-determined distance threshold value of label.
Optionally, the value that label takes inventory the transmission rate of equipment is the maximum in the first scope, wherein, the first scope
Determined according to feedback velocity, the transmission rate of RFID reader sends querying command or reading order for RFID reader
Speed.
Optionally,
Switch unit 501 is additionally operable to, when RFID reader by the second mode of operation take inventory the EPC of the label of reading
When numbering and the quantity of label do not change, RFID reader carries out frequency hopping, and is switched to the first work from the second mode of operation
Pattern；
Take inventory unit 502 to be additionally operable to, RFID reader enters taking inventory for row label by the first mode of operation.
The equipment can be used for performing the method that the embodiment shown in Fig. 2 and 3 is provided, therefore, for each of the equipment
Function that functional module can be realized etc. refers to the description of the embodiment shown in Fig. 2 and 3, seldom repeats.Wherein, due to jumping
Frequency unit 503 is not essential functional module, therefore shown in broken lines in Figure 5.
Fig. 6 is referred to, one embodiment of the invention also provides a kind of computer installation, and the computer installation includes at least one
Processor 601, at least one processor 601 are used to realize the embodiment of the present invention when performing the computer program stored in memory
The step of label technique for taking inventory of offer.
Optionally, at least one processor 601 can specifically include central processing unit (CPU), ASIC
(application specific integrated circuit, ASIC), can be that one or more is held for control program
Capable integrated circuit, can be opened using field programmable gate array (field programmable gate array, FPGA)
The hardware circuit of hair, can be BBP.
Optionally, at least one processor 601 can include at least one processing core.
Optionally, the computer installation also includes memory 602, and memory 602 can include read-only storage (read
Only memory, ROM), random access memory (random access memory, RAM) and magnetic disk storage.Memory
602 are used to store data required when at least one processor 601 is run.The quantity of memory 602 is one or more.Its
In, memory 602 is shown in the lump in figure 6, but it is understood that memory 602 is not essential functional module, therefore
It is shown in broken lines in Fig. 6.
In embodiments of the present invention, it should be understood that disclosed apparatus and method, can be real by another way
It is existing.For example, apparatus embodiments described above are only schematical, for example, the division of the unit or unit, is only
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, equipment or unit
Connect, can be electrical or other forms.
Each functional unit in embodiments of the present invention can be integrated in a processing unit；Or unit also may be used
To be independent physical module.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, the technical scheme of the embodiment of the present invention
All or part can be embodied in the form of software product, the computer software product is stored in a storage medium
In, including some instructions are causing a computer equipment, such as can be that personal computer, server, or network are set
It is standby etc., or all or part of step of each embodiment methods described of processor (processor) the execution present invention.It is and foregoing
Storage medium includes：General serial bus USB (universal serial bus flash drive), mobile hard disk,
ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Described above, above example is implemented above only the technical scheme of the application to be described in detail
The explanation of example is only intended to help the method for understanding the embodiment of the present invention, should not be construed as the limitation to the embodiment of the present invention.This
The change or replacement that those skilled in the art can readily occur in, should all cover the embodiment of the present invention protection domain it
It is interior.
Claims (14)
- A kind of 1. label technique for taking inventory, it is characterised in that including：Radio frequency discrimination RFID read write line is switched to the second mode of operation when carrying out frequency hopping, by the first current mode of operation；Its In, the RFID reader is in different working modes, the letter for being used to set feedback velocity that the querying command of transmission includes Breath is different, and the feedback velocity is the speed that label sends data to the RFID reader；The RFID reader carries out taking inventory for the label by second mode of operation, to obtain the electricity in the label Sub- product coding EPC numberings.
- 2. the method as described in claim 1, it is characterised in that the RFID reader carries out frequency hopping, including：When the RFID reader by the first mode of operation take inventory the label of reading EPC numberings and label quantity it is equal When not changing, the RFID reader carries out frequency hopping.
- 3. method as claimed in claim 2, it is characterised in that the RFID reader carries out frequency hopping, including：It is described when feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation RFID reader frequency hopping to remote frequency, wherein, the remote frequency is the distance that can read label not less than default The frequency of distance threshold；Or when feedback velocity corresponding to first mode of operation is less than feedback velocity corresponding to second mode of operation When, RFID reader frequency hopping frequency to the remote frequency or closely, wherein, the closely frequency is can The distance for reading label is less than the frequency of the pre-determined distance threshold value.
- 4. method as claimed in claim 3, it is characterised in that the querying command also includes being used for the letter for setting coded system Breath, wherein, the distance that label can be read corresponding to different coding mode is different；It is described when feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation Coded system corresponding to the querying command that RFID reader is sent in second mode of operation is remote coded system；Its In, the coded system is the coded system that label sends data use to the RFID reader；The remote coding staff Formula is that can read coded system of the distance not less than the pre-determined distance threshold value of label；Or when feedback velocity corresponding to first mode of operation is less than feedback velocity corresponding to second mode of operation When, coded system corresponding to the querying command that the RFID reader is sent in second mode of operation is remote coding staff Formula or closely coded system, the closely coded system are that the distance that can read label is less than the pre-determined distance threshold The coded system of value.
- 5. the method as described in claim 1, it is characterised in that the value of the transmission rate of the RFID reader is the first model Maximum in enclosing, wherein, first scope is to be determined according to the feedback velocity, the transmission speed of the RFID reader Rate is the speed that the RFID reader sends querying command or reading order.
- 6. the method as described in claim 1-5 is any, it is characterised in that worked in the RFID reader by described second After pattern carries out the taking inventory of the label, methods described also includes：When the RFID reader by the second mode of operation take inventory the label of reading EPC numberings and label quantity it is equal When not changing, the RFID reader carries out frequency hopping, and is switched to first mode of operation from second mode of operation；The RFID reader carries out taking inventory for the label by first mode of operation.
- 7. a kind of label takes inventory equipment, it is characterised in that including：Switch unit, for when label takes inventory equipment and carrying out frequency hopping, the first current mode of operation to be switched into the second work Operation mode；Wherein, the RFID reader in different working modes, feed back by the setting that is used for that the querying command of transmission includes The information of speed is different, and the feedback velocity is the speed that label sends data to the RFID reader；Unit is taken inventory, for carrying out taking inventory for the label by second mode of operation, to obtain the EPC in the label Numbering.
- 8. equipment as claimed in claim 7, it is characterised in that the label, which takes inventory equipment, also includes frequency hopping unit；The frequency hopping unit, the EPC of the label for by the first mode of operation take inventory reading when the RFID reader When numbering and the quantity of label do not change, frequency hopping is carried out.
- 9. equipment as claimed in claim 8, it is characterised in that the frequency hopping unit is specifically used for：It is described when feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation RFID reader frequency hopping to remote frequency, wherein, the remote frequency is the distance that can read label not less than default The frequency of distance threshold；Or when feedback velocity corresponding to first mode of operation is less than feedback velocity corresponding to second mode of operation When, RFID reader frequency hopping frequency to the remote frequency or closely, wherein, the closely frequency is can The distance for reading label is less than the frequency of pre-determined distance threshold value.
- 10. equipment as claimed in claim 9, it is characterised in that the querying command also includes being used to set coded system Information, wherein, the distance that label can be read corresponding to different coding mode is different；It is described when feedback velocity corresponding to first mode of operation is more than feedback velocity corresponding to second mode of operation Coded system corresponding to the querying command that RFID reader is sent in second mode of operation is remote coded system；Its In, the coded system is the coded system that label sends data use to the RFID reader；The remote coding staff Formula is that can read coded system of the distance not less than pre-determined distance threshold value of label；Or when feedback velocity corresponding to first mode of operation is less than feedback velocity corresponding to second mode of operation When, coded system corresponding to the querying command that the RFID reader is sent in second mode of operation is remote coding staff Formula or closely coded system, the closely coded system are that the distance that can read label is less than pre-determined distance threshold value Coded system.
- 11. equipment as claimed in claim 10, it is characterised in that the label takes inventory the value of the transmission rate of equipment as the Maximum in one scope, wherein, first scope is to be determined according to the feedback velocity, the hair of the RFID reader Transmission rate is the speed that the RFID reader sends querying command or reading order.
- 12. the equipment as described in claim 7-11 is any, it is characterised in thatThe switch unit is additionally operable to, when the RFID reader by the second mode of operation take inventory the label of reading When EPC is numbered and the quantity of label does not change, the RFID reader carries out frequency hopping, and switches from second mode of operation To first mode of operation；The unit of taking inventory is additionally operable to, and the RFID reader carries out taking inventory for the label by first mode of operation.
- 13. a kind of computer installation, it is characterised in that described device includes processor, and the processor is used to perform memory Realized during the computer program of middle storage as any one of claim 1-6 the step of method.
- 14. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that：The computer program Realized when being executed by processor as any one of claim 1-6 the step of method.
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|---|---|---|---|
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| CN113705258A (en) * | 2021-08-24 | 2021-11-26 | 电子科技大学 | Data exchange method between reader and RFID (radio frequency identification) tag |
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