CN104077551A - Radio frequency identification tag identifying method, device and system - Google Patents
Radio frequency identification tag identifying method, device and system Download PDFInfo
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- CN104077551A CN104077551A CN201310109877.XA CN201310109877A CN104077551A CN 104077551 A CN104077551 A CN 104077551A CN 201310109877 A CN201310109877 A CN 201310109877A CN 104077551 A CN104077551 A CN 104077551A
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Abstract
The embodiment of the invention discloses a radio frequency identification tag identifying method, device and system. The method comprises the steps of reading radio frequency identification tags in a first reading period, switching off a reading process, reading radio frequency identification tags in a second reading period, and determining the radio frequency identification tags are identified if the same radio frequency identification tag is read continuously in the first reading period and the second reading period. In addition, the switch-off time can be set according to conversation continuing time of the radio frequency identification tags to be identified. According to the method, the radio frequency identification tags are heated or lighted to shorten the conversation continuing time of the radio frequency identification tags, and accordingly the radio frequency identification tags can quickly power down. Furthermore, twice continuous reading in two continuous radio frequency identification reading periods can be achieved. Thus, serial-reading tags can be strictly filtered, and the reliability for filtering the serial-reading tags is improved.
Description
Technical field
The present invention relates to radio-frequency (RF) identification (Radio Frequency Identification, RFID) technical field, particularly relate to a kind of recognition methods, device and system of RFID tag.
Background technology
RFID technology is a kind of communication technology, can identify specific objective and read and write related data by radio signal, and without setting up machinery between recognition system and specific objective or optics contacts, conventional have embodiments such as low frequency (125k～134.2K), high frequency (HF), ultrahigh frequency (UHF).ID compares with high-frequency RF, ultrahigh frequency RFID have advantages of that read range is wider, reading speed is faster, label cost is lower and read write line and label antenna less, thereby can Direct Recognition object, but also have from the supply of material to the possibility of following the tracks of goods streamline.Yet ultrahigh frequency RF signal is often subject to the puzzlement of multi-path problem in radio propagation, and may cause thus string to read (stray read) problem, cause read write line None-identified to enter specifically which label within its antenna read range.
Fig. 1 is that the string being caused by multipath transmisstion in prior art is read schematic diagram.
As shown in Figure 1, the automobile of crown RFID label process successively from left to right on streamline, expectation rfid interrogator can be identified successively the label on roof within its read range.Yet, multipath transmisstion (such as the reflection with top of building or refraction) due to label signal, the current not label within the read range of read write line equally also may be read by read write line, and this string reads to cause the tag recognition confusion reigned on streamline.
Conventionally adopt in the prior art signal intensity indication (Received Signal Strength Indication, the RSSI) method or the Method for Phase Difference Measurement that receive to filter the label that generation string is read.Yet these existing modes all use with the parameter of RF signal correction and carry out filter operation, and be equally generally subject to the impact of multipath transmisstion with the parameter of RF signal correction, so these existing modes cannot be filtered reliably string and read label.
Summary of the invention
Embodiment of the present invention proposes a kind of recognition methods, device and system of RFID tag, to improve, filters the reliability that string is read label.
According to the technical scheme of embodiment of the present invention, comprise:
A recognition methods for RFID tag, comprising:
Reading rfid tags in the first read cycle;
Process is read in shutoff, and this turn-off time was set according to the session persistence of RFID tag to be identified;
Reading rfid tags in the second read cycle;
If read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
This turn-off time is set to less than the original session duration of RFID tag, and the session persistence after being greater than RFID tag and being shortened.
A recognition device for RFID tag, comprises reading unit, turn-offs unit and recognition unit, wherein:
Reading unit, for reading rfid tags in the first read cycle;
Turn-off unit, for turn-offing the process that reads, this turn-off time was set according to the session persistence of RFID tag to be identified;
Reading unit, also for reading rfid tags in the second read cycle;
Recognition unit, for judging whether reading unit reads continuously same RFID tag in the first read cycle and the second read cycle, if so, determines that this RFID tag is identified.
Turn-off unit, be set to for the turn-off time: be less than the original session duration of RFID tag, and the session persistence after being greater than RFID tag and being shortened.
A recognition system for RFID tag, comprises RFID tag, session persistence adjustment unit and read write line; Wherein:
Session persistence adjustment unit, for shortening the session persistence of the RFID tag in read write line read range by physics mode;
Read write line, for reading rfid tags in the first radio-frequency (RF) identification read cycle, process is read in shutoff, this turn-off time was set according to the session persistence of RFID tag to be identified, and reading rfid tags in the second read cycle, if wherein read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
Described session persistence, adjustment unit was firing equipment, and this firing equipment is positioned at RFID tag is transported on the streamline within read write line read range.
Described RFID tag is Photosensitive RFID tag; Described session persistence, adjustment unit was the light source being integrated on reading and writing device antenna, and this light source is for shortening the session persistence of RFID tag by illumination methods.
Described RFID tag has encapsulation, and in this encapsulation, has for receiving windowing from light source light photograph.
Described RFID tag is heated equipment and is heated between 45 ° of c to 50 ° of c.
The span of described turn-off time is 100 milliseconds to 2 seconds.
A recognition device for RFID tag, comprises light source and radio-frequency (RF) identification reading unit, wherein:
Light source, for shortening the session persistence of the RFID tag in read write line read range by illumination methods;
Radio-frequency (RF) identification reading unit, for reading rfid tags in the first radio-frequency (RF) identification read cycle, process is read in shutoff, this turn-off time was set according to the session persistence of RFID tag to be identified, and reading rfid tags in the second read cycle, if wherein read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
Radio-frequency (RF) identification reading unit comprises read write line and antenna, and light source is embedded in this antenna, and the open/break time of light source is subject to the control of read write line.
Further comprise the first bias device and the second bias device, the first bias device is connected with read write line, and the second bias device is connected with antenna, between the first bias device and the second bias device, by RF cable, is connected;
The first bias device, for integrated DC current signal and radiofrequency signal, and sends to the second bias device by RF cable by integrated signal;
The second bias device, for parse DC current signal and radiofrequency signal from integrated signal, sends to light source by DC current signal, and radiofrequency signal is sent to antenna.
From technique scheme, can find out, in invention embodiment, reading rfid tags in the first read cycle; Process is read in shutoff, and this turn-off time was set according to the session persistence of RFID tag to be identified; Reading rfid tags in the second read cycle; If read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.After application embodiment of the present invention, for RFID tag, carry out the physical treatments such as heating or illumination to shorten the session persistence of RFID tag, make RFID tag power down fast, and can in two continuous radio-frequency (RF) identification read cycles, realize twice thus and read continuously, thereby can strictly filter string and read label, improve and filtered the reliability that string is read label.
Accompanying drawing explanation
In order to make technical scheme of the present invention and advantage clearer, below in conjunction with drawings and the embodiments, the present invention is further elaborated.Should be appreciated that embodiment described herein is only in order to illustrative explanation the present invention, the protection domain being not intended to limit the present invention.
Fig. 1 is that the string being caused by Multipath Transmission in prior art is read schematic diagram;
Fig. 2 is the recognition methods process flow diagram of the RFID tag of embodiment of the present invention;
Fig. 3 is the recognition methods process flow diagram according to the RFID tag of embodiment of the present invention;
Fig. 4 changes schematic diagram according to the embodiment of the present invention sign (flag) relevant to label session persistence;
Fig. 5 is the recognition device structural drawing according to the RFID tag of embodiment of the present invention;
Fig. 6 is the recognition system structural drawing of the RFID tag of embodiment of the present invention;
Fig. 7 is the recognition system structural drawing of the RFID tag of embodiment of the present invention type of heating;
Fig. 8 is the recognition system structural drawing of the RFID tag of embodiment of the present invention illumination methods;
Fig. 9 is the recognition device structural drawing of the RFID tag of embodiment of the present invention;
Figure 10 is read write line and the reading and writing device antenna connection diagram of embodiment of the present invention.
Embodiment
The present inventor creatively finds: the side information (side information) that can use other source (such as light or heat etc.) to provide filters string and reads label, and does not need the parameter of directly employing and RF signal correction.
Fig. 2 is the recognition methods process flow diagram according to the RFID tag of embodiment of the present invention.
As shown in Figure 2, the method comprises:
Step 201: reading rfid tags in the first read cycle.
Step 202: turn-off the process that reads, this turn-off time was set according to the session persistence of RFID tag to be identified.
Step 203: reading rfid tags in the second read cycle.
Step 204: if read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
Preferably, for RFID tag, carry out physical treatment to shorten the session persistence of RFID tag, and the turn-off time is set to less than the original session duration of RFID tag, and session persistence after being greater than RFID tag and being shortened.
Fig. 3 is the recognition methods process flow diagram according to the RFID tag of embodiment of the present invention.
As shown in Figure 3, the method comprises:
Step 301: the session persistence that shortens the RFID tag in read write line read range by physics mode.
First, in EPC C1G2 agreement, definition has make an inventory to distinguish (inventoried) label and new label of session persistence (session persistent time) of RFID tag.Here, inventor is creative finds: the session persistence that can shorten RFID tag by multiple physics mode is for this label of follow-up identification.Such as: can carry out the physical operationss such as heating or illumination for the RFID tag entering within the read range of read write line, the session persistence of RFID tag is shortened, thereby can be less than the turn-off time between radio-frequency (RF) identification read cycle.Generally, the concrete time span of radio-frequency (RF) identification read cycle is consistent.
And, inventor finds through great many of experiments, the session persistence of RFID tag and temperature correlation, when being heated between 45 ° of c to 50 ° of c, RFID tag there is preferably session persistence, now session persistence is much smaller than 1 second, this session persistence after shortening much smaller than RFID tag original session persistence.
Step 302: reading rfid tags in the first radio-frequency (RF) identification read cycle.
Here, read write line can be in the first radio-frequency (RF) identification read cycle reading rfid tags.
For example, with the S2 sign explanation of RFID tag, when read write line is in the first radio-frequency (RF) identification read cycle after reading rfid tags, S2 mark will change to B from A.
Step 303: when again reading this RFID tag in the second radio-frequency (RF) identification read cycle, confirm that this RFID tag is identified.
Because session persistence of RFID tag is shortened, thereby be less than the turn-off time between radio-frequency (RF) identification read cycle here.Therefore before the second radio-frequency (RF) identification read cycle starts, RFID tag has completed power down.That is to say reading rfid tags again in the second radio-frequency (RF) identification read cycle.
Still with the S2 of RFID tag, being masked as example describes, when read write line is in the first radio-frequency (RF) identification read cycle after reading rfid tags, S2 mark will change to B from A, and because the session persistence of RFID tag has been less than the turn-off time between radio-frequency (RF) identification read cycle, therefore within the turn-off time between the first radio-frequency (RF) identification read cycle and the second radio-frequency (RF) identification read cycle, label has completed power down.That is to say, the S2 sign of label had again changed to A before the second radio-frequency (RF) identification read cycle starts, therefore read write line can again read this RFID tag in the second radio-frequency (RF) identification read cycle, after confirming again to have read this RFID tag, confirm that this RFID tag is identified.
Visible, according to the embodiment of the present invention by carry out the physical treatments such as heating or illumination for RFID tag, shortened the session persistence of RFID tag, make RFID tag power down fast, and can in two continuous radio-frequency (RF) identification read cycles, realize twice thus and read continuously.
On the contrary, string is read label and is not subject to various physics modes impacts owing to being positioned at outside the read range of read write line, and its session persistence will can not shorten, and therefore also can in two continuous radio-frequency (RF) identification read cycles, not be read.
With sequential describing mode, embodiment of the present invention is described in more detail below.
Fig. 4 changes schematic diagram according to the embodiment of the present invention sign (flag) relevant to label session persistence.
In Fig. 4, with the S2 of RFID tag, be masked as example and describe.T1 is the first radio-frequency (RF) identification read cycle; T2 is the second radio-frequency (RF) identification read cycle; Between T1 and T2, be the turn-off time.Generally, the span of turn-off time is between 100 milliseconds to 2 seconds.
When RFID tag is not heated (between-25 ° of c to 40 ° of c), at T1 time interior label, be read, S2 sign is changed to B at T1 time negative edge from A.Therefore because RFID tag is not heated, its session persistence (generally between 25 seconds to 40 seconds) is not shortened, and at T2 in the time period, S2 sign is still maintained B, can not be read by read write line.Visible, when RFID tag is not heated, within T1 and these two continuous radio-frequency (RF) identification read cycles of T2, label can only be read once.
When RFID tag is heated after (between 45 ° of c to 50 ° of c), at T1 time interior label, be read, S2 sign is changed to B at T1 time negative edge from A.Because RFID tag is heated, its session persistence (generally much smaller than 1 second) is significantly shortened, so within the turn-off time, S2 sign changes to A from B, so can be read by read write line in the time period at T2.Visible, after RFID tag is heated, within T1 and these two continuous radio-frequency (RF) identification read cycles of T2, label can be read twice continuously.
S2 with RFID tag is masked as example above, and embodiment of the present invention be have been described in detail.It will be appreciated by those of skill in the art that signs such as embodiment of the present invention can also being applied to the S1, the S3 that define in EPC C1G2 agreement and SL, embodiment of the present invention is to this and indefinite.
Take above and RFID tag is heated to shorten session persistence embodiment of the present invention be have been described in detail as example, in fact, according to other embodiment of the present invention, can also shorten the session persistence of RFID tag by other physics mode.Such as, can also shorten the session persistence of RFID tag by the mode of irradiation frequency identification tag according to the embodiment of the present invention, also can obtain similar effect.
Based on above-mentioned labor, a kind of recognition system of RFID tag has also been proposed according to the embodiment of the present invention.
Fig. 5 is the recognition device structural drawing according to the RFID tag of embodiment of the present invention.
As shown in Figure 5, this device comprises reading unit 501, turn-offs unit 502 and recognition unit 503, wherein:
Reading unit 501, for reading rfid tags in the first read cycle;
Turn-off unit 502, for turn-offing the process that reads, this turn-off time was set according to the session persistence of RFID tag to be identified;
Reading unit 501, also for reading rfid tags in the second read cycle;
Recognition unit 503, for judging whether reading unit reads continuously same RFID tag in the first read cycle and the second read cycle, if so, determines that this RFID tag is identified.
Preferably, RFID tag is performed physical treatment to shorten the session persistence of RFID tag.And, turn-off unit 502, be set to for the turn-off time: be less than the original session duration of RFID tag, and the session persistence after being greater than RFID tag and being shortened.More preferably, the span of turn-off time is 100 milliseconds to 2 seconds.
Fig. 6 is the recognition system structural drawing according to the RFID tag of embodiment of the present invention.
As shown in Figure 6, this system comprises RFID tag 601, session persistence adjustment unit 602 and read write line 603; Wherein:
Session persistence adjustment unit 602, for shorten the session persistence of the RFID tag 601 in read write line read range by physics mode;
Read write line 603, for reading rfid tags 601 in the first radio-frequency (RF) identification read cycle, process is read in shutoff, this turn-off time was set according to the session persistence of RFID tag to be identified, and reading rfid tags in the second read cycle, if wherein read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.Preferably, the turn-off time is set to less than the original session duration of RFID tag, and the session persistence after being greater than RFID tag and being shortened.
Particularly, RFID tag 601 can be the label of passive, semi-passive (also referred to as half initiatively) or active type.Passive label does not have internal power supply, and its internal integrated circuit drives by the electromagnetic wave energy receiving, and these electromagnetic waves are to be sent by rfid interrogator, when label receives the electromagnetic wave signal of sufficient intensity, can send data to read write line.
Semi-active type labels class is similar to passive label, but its many compact battery, electric power can drive label integrated circuit just, makes the state of label integrated circuit in work.Such benefit is, label antenna can complete the electromagnetic task that receives, fully as the use of return path signal.Compared with passive label, semi-active type has reaction velocity faster, better efficiency.
Different with semi-passive label from passive label, active tag itself has internal electric source supply, in order to supply the required power supply of internal integrated circuit to produce transmitted signal.In general, active tag has long distance and the larger memory body capacity of reading, and can be used for storing some additional informations that read write line sends.
In one embodiment, session persistence adjustment unit 602 be specially firing equipment (such as being hot rifle), this firing equipment is positioned at RFID tag 601 is transported on the streamline within read write line 603 read ranges.Preferably, this firing equipment has proximity induction function (such as laser detection), thereby when sensing that RFID tag 601 just starts to provide heat after close, and sensing that RFID tag 601 stops providing heat after leaving, to save the energy.More preferably, described RFID tag is heated equipment and is heated between 45 ° of c to 50 ° of c.
Alternatively, RFID tag 601 can also be specifically Photosensitive RFID tag; And session persistence adjustment unit 602 for being integrated into the light source on read write line 603.Photosensitive RFID tag preferably has encapsulation, and in this encapsulation, has for receiving windowing from light source light photograph.Light source is carried out illumination physical operations to the RFID tag 601 within the read range of read write line 603, thereby shortens the session persistence of RFID tag.Preferably, the open/break time of light source is subject to the control of read write line 603, thereby can when identification starts, open in time light source, and after end of identification, closes in time light source.
To identify the recognition system of RFID tag by type of heating, carry out exemplary illustrated below.
Fig. 7 is the recognition system structural drawing according to the RFID tag of the type of heating of embodiment of the present invention.
As shown in Figure 7, in packages application, parcel from left to right passes through streamline successively, under each parcel, has RFID tag.Read write line is arranged on streamline side, and is provided with hot rifle at adjacent locations place, the left side of read write line, within this hot rifle is positioned at the read range of read write line.When label is from left to right after overheated rifle, will be by hot rifle transient heating, and will be read twice and finally be identified by read write line.And string outside the read range of read write line is read label owing to being only read once and not and being identified.
To identify the recognition system of RFID tag by illumination methods, carry out exemplary illustrated below.
Fig. 8 is the recognition system structural drawing according to the RFID tag of embodiment of the present invention illumination methods.
As shown in Figure 8, on automobile streamline, automobile from left to right passes through streamline successively, has Photosensitive RFID tag on each automobile, and Photosensitive RFID tag is only by light stimulus.Read write line is arranged on streamline top, and on read write line, be provided with light source (such as being arranged on reading and writing device antenna), within this light source range of exposures is positioned at the read range of read write line, thereby light source only encourages the label within the read range that is currently located at read write line.
When automobile from left to right passes through light source range of exposures, the Photosensitive RFID tag on automobile will be encouraged by light source moment, thereby will be read twice and finally be identified by read write line.And string outside the read range of read write line is read label owing to being only read once and not and being identified.
Preferably, open/the break time of light source can be subject to the control of read write line, thereby can when starting, tag recognition open light source in time, and after finishing, tag recognition closes in time light source, such as, as shown in Figure 6, the work schedule of the work schedule of light source and reading and writing device antenna port can be consistent.
It will be appreciated by those of skill in the art that can be for needing arbitrarily any production run in the fields such as industrial automation, building automation, cultivation robotization, sorting robotization of radio-frequency (RF) tag identification according to the applicable production run of the embodiment of the present invention.
Fig. 9 is the recognition device structural drawing according to the RFID tag of embodiment of the present invention.
As shown in Figure 9, comprise light source 901 and radio-frequency (RF) identification reading unit 902, wherein:
Light source 901, for by illumination methods, shorten in read write line read range session persistence of RFID tag;
Radio-frequency (RF) identification reading unit 902, for reading rfid tags in the first radio-frequency (RF) identification read cycle, process is read in shutoff, this turn-off time was set according to the session persistence of RFID tag to be identified, and reading rfid tags in the second read cycle, if wherein read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
In industry spot practical application, radio-frequency (RF) identification reading unit 902 can comprise read write line and reading and writing device antenna, and read write line is connected by RF cable with reading and writing device antenna.
Figure 10 is according to the read write line of embodiment of the present invention and reading and writing device antenna connection diagram.
As shown in figure 10, radio-frequency (RF) identification reading unit comprises read write line and antenna, and wherein light source is embedded in antenna, and the open/break time of light source is subject to the control of read write line.
Radio-frequency (RF) identification reading unit further comprises the first bias device and the second bias device, and the first bias device is connected with read write line, and the second bias device is connected with antenna, between the first bias device and the second bias device, by RF cable, is connected.
The first bias device, for integrated DC current signal and radiofrequency signal, and sends to the second bias device by RF cable by integrated signal;
The second bias device, for parse DC current signal and radiofrequency signal from integrated signal, sends to light source by DC current signal, and radiofrequency signal is sent to antenna.Light source receives after DC current signal, can from DC current signal, obtain energy luminous, and the open/break time that makes light source be subject to the control of read write line, thereby can when tag recognition starts, open light source in time, and after tag recognition finishes, close in time light source.
The identification RFID tag method that can embodiment of the present invention be proposed by the storing mode of instruction or instruction set storage is stored on various machine-readable storage mediums.These storage mediums include, but are not limited to: floppy disk, CD, DVD, hard disk, flash memory, USB flash disk, CF card, SD card, mmc card, SM card, memory stick (Memory Stick), xD card etc.In addition, the identification RFID tag method that embodiment of the present invention can also be proposed is applied in the storage medium based on flash memory (Nand flash), such as USB flash disk, CF card, SD card, SDHC card, mmc card, SM card, memory stick, xD card etc.
The identification RFID tag method proposing when embodiment of the present invention can also be embodied as to various forms of computer instructions.When these computer instructions are performed in machine, can make machine carry out the identification RFID tag method that embodiment of the present invention proposes.
In sum, in invention embodiment, reading rfid tags in the first read cycle; Process is read in shutoff, and this turn-off time was set according to the session persistence of RFID tag to be identified; Reading rfid tags in the second read cycle; If read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.As can be seen here, after application embodiment of the present invention, for RFID tag, carry out the physical treatments such as heating or illumination, shortened the session persistence of RFID tag, make RFID tag power down fast, and can in two continuous radio-frequency (RF) identification read cycles, realize twice thus and read continuously, thereby can strictly filter string, read label, and improved and filtered the reliability that string is read label.
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (13)
1. a recognition methods for RFID tag, is characterized in that, comprising:
Reading rfid tags in the first read cycle;
Process is read in shutoff, and this turn-off time was set according to the session persistence of RFID tag to be identified;
Reading rfid tags in the second read cycle;
If read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
2. the recognition methods of RFID tag according to claim 1, is characterized in that, this turn-off time is set to less than the original session duration of RFID tag, and the session persistence after being greater than RFID tag and being shortened.
3. a recognition device for RFID tag, is characterized in that, comprise reading unit, turn-off unit and recognition unit, wherein:
Reading unit, for reading rfid tags in the first read cycle;
Turn-off unit, for turn-offing the process that reads, this turn-off time was set according to the session persistence of RFID tag to be identified;
Reading unit, also for reading rfid tags in the second read cycle;
Recognition unit, for judging whether reading unit reads continuously same RFID tag in the first read cycle and the second read cycle, if so, determines that this RFID tag is identified.
4. the recognition device of RFID tag according to claim 3, is characterized in that,
Turn-off unit, be set to for the turn-off time: be less than the original session duration of RFID tag, and the session persistence after being greater than RFID tag and being shortened.
5. a recognition system for RFID tag, is characterized in that, comprises RFID tag, session persistence adjustment unit and read write line; Wherein:
Session persistence adjustment unit, for shortening the session persistence of the RFID tag in read write line read range by physics mode;
Read write line, for reading rfid tags in the first radio-frequency (RF) identification read cycle, process is read in shutoff, this turn-off time was set according to the session persistence of RFID tag to be identified, and reading rfid tags in the second read cycle, if wherein read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
6. the recognition system of RFID tag according to claim 5, is characterized in that, described session persistence adjustment unit be firing equipment, this firing equipment is positioned at RFID tag is transported on the streamline within read write line read range.
7. the recognition system of RFID tag according to claim 5, is characterized in that, described RFID tag is Photosensitive RFID tag; Described session persistence, adjustment unit was the light source being integrated on reading and writing device antenna, and this light source is for shortening the session persistence of RFID tag by illumination methods.
8. the recognition system of RFID tag according to claim 7, is characterized in that, described RFID tag has encapsulation, and in this encapsulation, has for receiving windowing from light source light photograph.
9. the recognition system of RFID tag according to claim 6, is characterized in that, described RFID tag is heated equipment and is heated between 45 ° of c to 50 ° of c.
10. according to the recognition system of the RFID tag described in any one in claim 5 to 9, it is characterized in that, the span of described turn-off time is 100 milliseconds to 2 seconds.
The recognition device of 11. 1 kinds of RFID tag, is characterized in that, comprises light source and radio-frequency (RF) identification reading unit, wherein:
Light source, for shortening the session persistence of the RFID tag in read write line read range by illumination methods;
Radio-frequency (RF) identification reading unit, for reading rfid tags in the first radio-frequency (RF) identification read cycle, process is read in shutoff, this turn-off time was set according to the session persistence of RFID tag to be identified, and reading rfid tags in the second read cycle, if wherein read continuously same RFID tag in the first read cycle and the second read cycle, determine that this RFID tag is identified.
The recognition device of 12. RFID tag according to claim 11, is characterized in that, radio-frequency (RF) identification reading unit comprises read write line and antenna, and light source is embedded in this antenna, and the open/break time of light source is subject to the control of read write line.
The recognition device of 13. RFID tag according to claim 11, it is characterized in that, further comprise the first bias device and the second bias device, the first bias device is connected with read write line, the second bias device is connected with antenna, between the first bias device and the second bias device, by RF cable, is connected;
The first bias device, for integrated DC current signal and radiofrequency signal, and sends to the second bias device by RF cable by integrated signal;
The second bias device, for parse DC current signal and radiofrequency signal from integrated signal, sends to light source by DC current signal, and radiofrequency signal is sent to antenna.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109145664A (en) * | 2018-08-20 | 2019-01-04 | 成都九洲电子信息系统股份有限公司 | A method of it improving UHF reader multi-tag and distinguishes ability |
| CN113255383A (en) * | 2021-05-28 | 2021-08-13 | 卓捷创芯科技（深圳）有限公司 | Discharge control circuit and method for extending communication distance of radio frequency identification tag |
| WO2021164039A1 (en) * | 2020-02-22 | 2021-08-26 | 南京大学 | Method and device for authenticating passive rfid tag |
| CN113408310A (en) * | 2020-03-17 | 2021-09-17 | 菜鸟智能物流控股有限公司 | Data processing method and device, electronic equipment and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109145664A (en) * | 2018-08-20 | 2019-01-04 | 成都九洲电子信息系统股份有限公司 | A method of it improving UHF reader multi-tag and distinguishes ability |
| WO2021164039A1 (en) * | 2020-02-22 | 2021-08-26 | 南京大学 | Method and device for authenticating passive rfid tag |
| US11948031B2 (en) | 2020-02-22 | 2024-04-02 | Nanjing University | Method and device for authenticating passive RFID tag |
| CN113408310A (en) * | 2020-03-17 | 2021-09-17 | 菜鸟智能物流控股有限公司 | Data processing method and device, electronic equipment and computer readable storage medium |
| CN113255383A (en) * | 2021-05-28 | 2021-08-13 | 卓捷创芯科技（深圳）有限公司 | Discharge control circuit and method for extending communication distance of radio frequency identification tag |
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| CN104077551B (en) | 2017-10-24 |
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