Summary of the invention
The present invention provides a kind of RFID chip, RFID electronic label, can monitor whether commodity are opened, can effectively avoidRFID electronic label is recycled.
The present invention also provides a kind of commodity using above-mentioned RFID electronic label, can monitor whether commodity are opened,The RFID electronic label of commodity can be effectively avoided to be recycled.
In order to solve the above technical problems, according to an aspect of the present invention, adopting the following technical scheme that
A kind of RFID electronic label, the RFID electronic label include anti-unlatching RFID chip, record coil, radio frequency dayLine；
The RFID chip includes: rf analog front-end, digital logic unit, memory, the first tie point, the second connectionPoint and rewriting circuit；The record coil is separately connected first tie point, the second tie point；
The rf analog front-end is converted to complete the energy of electromagnetic field；The digital logic unit is set to completeWork-based logic；The memory is to store communication data information；
The digital logic unit includes detection circuit, and circuit is rewritten in detection circuit connection, and the rewriting circuit connection is depositedReservoir；
The detection circuit connects the second tie point, rewrites the first tie point of circuit connection；In the first tie point connection theIn the state of two tie points, detection circuit rewrites circuit, the first tie point, the second tie point forming circuit；
The detection circuit detects that the first tie point, the second tie point both end voltage or electric current generate feedback to basisSignal is to rewriting circuit；
The circuit of rewriting to carry out write operation to memory according to the feedback signal of the detection circuit, open by write-inRecord information；
The detection circuit detects the voltage or electric current between the first tie point, the second tie point；If detection circuit detectsIt is normal value VH to the voltage between the first tie point, the second tie point, then shows that state is normal；If detection circuit detectsOne tie point, the second tie point both end voltage are exceptional value VL, then show extension circuit part abnormal state, rewrite circuit to depositingReservoir carries out write operation, and open record information is written；
The radio-frequency antenna connects anti-the first solder joint, second solder joint for opening RFID chip, and radio-frequency antenna is high frequencyOr ultra-high frequency antenna；There is the easily broken edge of a knife on the outside of the record coil.
A kind of RFID chip, the RFID chip include: detection circuit, storage unit, the first tie point, the second tie pointAnd rewrite circuit；
The detection circuit is separately connected the first tie point, the second tie point, detects the first tie point, the second tie point twoThe voltage or electric current at end, and generate feedback signal；
Circuit is rewritten in the detection circuit connection, and the detection circuit is to be delivered to rewriting electricity for the feedback signal of generationRoad；
The rewriting circuit connection storage unit, the rewriting circuit meet to the feedback signal conveyed in detection circuitWhen setting condition, write operation is carried out to storage unit, open record information is written.
As one embodiment of the present invention, the circuit of rewriting works according to the feedback signal that detection circuit conveys；
If detection circuit detects that the voltage between the first tie point, the second tie point is setting normal value, show shapeState is normal, rewrites circuit and does not act；
If detection circuit detects that the first tie point, the second tie point both end voltage for setting exceptional value, show extensionCircuit part abnormal state rewrites circuit to storage unit and carries out write operation, and write-in commodity are turned on record information.
As one embodiment of the present invention, the detection circuit connects the second tie point, rewrites circuit connection firstTie point；In the state that the first tie point connects the second tie point, detection circuit rewrites circuit, the first tie point, the second companyContact forming circuit.
As one embodiment of the present invention, the RFID chip further includes rf analog front-end, digital logic unit；The rf analog front-end is converted to complete the energy of electromagnetic field；The digital logic unit is patrolled to complete set workVolume；
The rf analog front-end include rectification circuit, voltage regulator circuit, clock circuit, demodulator circuit, electrification reset circuit,Adjustment circuit, tuning capacitance, randomizer.
A kind of RFID electronic label, including above-mentioned RFID chip, record coil, radio-frequency antenna；RFID chip connection is penetratedFrequency antenna, the record coil are separately connected first tie point, the second tie point.
As one embodiment of the present invention, the anti-rf analog front-end for opening RFID chip includes the first welderingPoint, the second solder joint, the radio-frequency antenna connect the first solder joint of the RFID chip, the second solder joint.
As one embodiment of the present invention, there is the easily broken edge of a knife on the outside of the record coil.
A kind of commodity, including above-mentioned RFID electronic label；The record coil of the RFID electronic label is set to commodityAt packaging seal, record coil can disconnect after packaging seal is opened.
As one embodiment of the present invention, first tie point, the second tie point are respectively arranged at packaging sealTwo sides, the connecting line between the first tie point, the second tie point disconnects after packaging seal is destroyed.
A kind of detection method of RFID chip, the detection method include:
The voltage or electric current of the first tie point, the second tie point both ends are detected using detection circuit, generate feedback signal；AndThe feedback signal of generation is delivered to rewriting circuit；
When the feedback signal of detection circuit conveying meets setting condition, carry out writing behaviour to storage unit using circuit is rewrittenMake, open record information is written.
As one embodiment of the present invention, the circuit of rewriting works according to the feedback signal that detection circuit conveys；
If detection circuit detects that the voltage between the first tie point, the second tie point is setting normal value, show shapeState is normal, rewrites circuit and does not act；
If detection circuit detects that the first tie point, the second tie point both end voltage for setting exceptional value, show extensionCircuit part abnormal state rewrites circuit to storage unit and carries out write operation, and write-in is turned on record information.
The beneficial effects of the present invention are: RFID chip proposed by the present invention, RFID electronic label, commodity, RFID electronicsRecord antenna is placed in commodity packaging sealing part when in use by label, and read-write antenna and functional chip are located at sealing with outskirtDomain, when commodity packaging is turned on, the record antenna loop of label is destroyed disconnection, and read-write antenna and chip are not destroyed andIt is fully functional.
Due to having the logic for judging to record antenna and whether being connected in the functional chip of RFID electronic label of the present inventionCircuit, and record antenna conducting circuit disconnection and record and can not change, after the RFID electronic label is used for commodity packaging,In chip operation, when such as recording antenna, read-write antenna and complete chip, electronic tag is worked normally；When commodity packaging quiltAfter unlatching, record antenna conducting circuit is disconnected, and read-write antenna and chip are still complete, and the read-write capability of electronic tag is stillIt is so normal, but its record antenna can be recorded and be disconnected and record and can not change again, accordingly even when this piece of RFID electronic labelOr the commodity packaging with this piece of RFID electronic label is recycled by criminal again, consumer can also by reader andCorresponding software identifies that commodity packaging corresponding to the label has been turned on or used, in favor of protecting the legal power of consumerBenefit.
RFID electronic label of the invention has the characteristic of anti-unlatching, based on information record and feedback function, records non-awardUnlatching behavior is weighed, to realize the function of preventing unauthorized unlatching.
Specific embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
For a further understanding of the present invention, the preferred embodiment of the invention is described below with reference to embodiment, stillIt should be appreciated that these descriptions are only further explanation the features and advantages of the present invention, rather than to the claims in the present inventionLimitation.
Just for several typical embodiments, the present invention is not limited merely to the model of embodiment description for the description of the partIt encloses.Some technical characteristics in same or similar prior art means and embodiment, which are replaced mutually, also to be described in the present inventionIn the range of protection.
Present invention discloses a kind of RFID chip, Fig. 1 is that the composition schematic diagram of RFID chip in one embodiment of the invention (connectsContact connection status), Fig. 2 is the composition schematic diagram (tie point off-state) of RFID chip in one embodiment of the invention；It please joinFig. 1, Fig. 2 are read, the RFID chip includes: detection circuit 6, storage unit (can be memory 3), the first tie point 4, secondTie point 5 and rewriting circuit 7.
In one embodiment of this invention, the first tie point 4 can be the first external tie point, and the second tie point 5 can be withFor the second external tie point.The extension circuit part for connecting and composing said chip of first tie point 4, the second tie point 5.
The detection circuit 6 is separately connected the first tie point 4, the second tie point 5, detection the first tie point 4, second connectionThe voltage or electric current at 5 both ends of point, and generate feedback signal.Circuit 7 is rewritten in the connection of detection circuit 6, and the detection circuit 6 is usedCircuit 7 is rewritten so that the feedback signal of generation to be delivered to.The rewriting circuit 7 connects storage unit, the rewriting circuit 7 toWhen the feedback signal that detection circuit 6 conveys meets setting condition, write operation, write-in open record letter are carried out to storage unitBreath.
In one embodiment of the invention, the circuit 7 of rewriting works according to the feedback signal that detection circuit 6 conveys；If detection circuit 6 detects that the voltage between the first tie point 4, the second tie point 5 is setting normal value, show state justOften, circuit 7 is rewritten not act；If it is different to set that detection circuit 6 detects the first tie point 4,5 both end voltage of the second tie pointConstant value then shows extension circuit part abnormal state, rewrites circuit 7 to storage unit and carries out write operation, write-in commodity are turned onRecord information.
Figure 12 is the schematic diagram (disconnection of extension circuit) of the detection circuit of RFID chip in one embodiment of the invention, Tu13WeiThe schematic diagram (circuit conducting) of the detection circuit of RFID chip in one embodiment of the invention；Figure 12, Figure 13 are please referred to, in the present inventionAn embodiment in, detection circuit 6 include first comparator 61.The inverting input terminal of first comparator 61 connects voltage VL, theThe normal phase input end of one comparator 61 can receive voltage in the state of being access between the first tie point 4, the second tie point 5VH signal (as shown in figure 13), the output end conveying voltage VH signal of first comparator 61 extremely rewrites circuit 7 at this time.First comparesThe normal phase input end of device 61 the first tie point 4, the second tie point 5 it is separated in the state of can not receive voltage VH signal(as shown in figure 12), the output end conveying voltage VL signal of first comparator 61 extremely rewrites circuit 7 at this time.
Figure 14 is the schematic diagram of the rewriting circuit of RFID chip in one embodiment of the invention；Figure 14 is please referred to, in the present inventionAn embodiment in, rewrite circuit 7 by one second comparator 71 realize rewrite work.The normal phase input end of second comparator 71Connect voltage VH, the output signal of the inverting input terminal connection first comparator 61 of the second comparator 71.If first comparator 61Output signal be voltage VH signal, the second comparator 71 output end output normal signal (not to memory 3 input rewrite letterNumber)；If the output signal of first comparator 61 is voltage VL signal, the output end of the second comparator 71 exports open record informationWrite-in signal (is written commodity to memory 3 and is turned on record information).
In one embodiment of the invention, as shown in Figure 1 and Figure 2, the detection circuit 6 connects the second tie point 5, changesWrite circuit 7 connects the first tie point 4；In the state that the first tie point 4 connects the second tie point 5, detection circuit 6 rewrites electricityRoad 7, the first tie point 4, the second tie point 5 forming circuit.Wherein, VDD is device inside operating voltage, and Din/Dout is numberInput and output, W/R are read-write operations, and ADDR is address signal, and DAT is data-signal, and LA/LB is two of RFID radio-frequency antennaTerminals, PAD are the pads in RFID chip.
Figure 11 is the composition schematic diagram (tie point connection status) of RFID chip in one embodiment of the invention；Please refer to figure11, in another embodiment of the invention, detection circuit 6 can be directly connected to the first tie point 4, the second tie point 5, rewrite electricity7 connection detection circuit 6 of road.
In one embodiment of this invention, the RFID chip includes rf analog front-end 1, digital logic unit 2, detectionThe a part of circuit 6 as digital logic unit 2.
The rf analog front-end 1 is converted to complete the energy of electromagnetic field；The digital logic unit 2 is to complete bothDetermine work-based logic；The memory 3 is to store communication data information.Rf analog front-end 1, can handle after receiving radio waveA portion is converted to the electric energy of driving circuit, electric energy needed for providing work for RFID chip and RFID electronic label.
Fig. 3 is the composition schematic diagram of RFID chip rf analog front-end in one embodiment of the invention；Referring to Fig. 3, at thisIn one embodiment of invention, the rf analog front-end includes rectification circuit, voltage regulator circuit, clock circuit, demodulator circuit, powers onReset circuit, adjustment circuit, tuning capacitance, randomizer.The technology of rf analog front-end is highly developed, can makeWith existing rf analog front-end or later period newly developed rf analog front-end；Rf analog front-end and not this Applicant's Abstract graph coreThe heart improves, and is not described herein.
The present invention discloses a kind of detection method of RFID chip, and Fig. 4 is that RFID chip detected in one embodiment of the inventionThe flow chart of journey；Referring to Fig. 4, in one embodiment of this invention, the detection method includes: to be detected using detection circuit 6First tie point 4,5 both ends of the second tie point voltage or electric current, generate feedback signal；And the feedback signal of generation is delivered toRewrite circuit 7；When the feedback signal that detection circuit 6 conveys meets setting condition, carried out using circuit 7 is rewritten to storage unitOpen record information is written in write operation.
In one embodiment of this invention, the circuit 7 of rewriting works according to the feedback signal that detection circuit 6 conveys；IfDetection circuit 6 detects that the voltage between the first tie point 4, the second tie point 5 is setting normal value, then shows that state is normal,Circuit 7 is rewritten not act；If detection circuit 6 detects that the first tie point 4,5 both end voltage of the second tie point are abnormal for settingValue then shows extension circuit part abnormal state, rewrites circuit 7 to storage unit and carries out write operation, write-in is turned on record letterBreath.
In one embodiment of this invention, when the external world has electromagnetic wave to drive the chip operation, the detection of chip interiorVoltage on first tie point 4 of the detection of circuit 6, the second tie point 5, if the first tie point 4, the second normally connection of tie point 5, electricityPressure is normal value VH, then shows that state is normal；If detection circuit 6 detects the first tie point 4,5 both end voltage of the second tie pointFor exceptional value VL, then show extension circuit part abnormal state, rewrites circuit 7 to memory 3 and carry out write operation, note is opened in write-inRecord information；As shown in Figure 2.VH, VL are limited to actual equipment and use environment, therefore as voltage value in specific implementationSection can only be provided according to actual example, in one embodiment of this invention, VH=1.6V~3V, VL=0V~1.5V.
In one embodiment of this invention, based on chip circuit Function detection above-mentioned " extension circuit part abnormal state "Process can also realize that principle is similar with detection voltage by detection electric current.
Fig. 4 is the flow chart of RFID chip detection process in one embodiment of the invention；Referring to Fig. 4, of the invention oneIn embodiment, the detection method of the RFID chip specifically comprises the following steps:
Step S1, when there is electromagnetic wave driving RFID chip work in the external world, beginning is powered on；
Step S2, rf analog front-end 1, digital logic unit 2 start to work (including to signal carry out pressure stabilizing, rectification, tuneDemodulation process processed)；
Step S3, the data in memory 3 are read；
Step S4, judge whether there is open record information in memory；If no, going to step S6；If so, going to stepS5；
Step S5, the voltage between the first tie point 4, the second tie point 5 is detected；
If detection circuit 6 detects that the voltage between the first tie point 4, the second tie point 5 is setting normal value VH, tableBright state is normal, goes to step S6；
If detection circuit 6 detects that the first tie point 4,5 both end voltage of the second tie point for setting exceptional value VL, showExtension circuit part abnormal state, goes to step S7；
Step S6, circuit 7 is rewritten without operation；Go to step S8；
Step S7, it rewrites circuit 7 and carries out write operation to storage unit, write-in is turned on record information；Go to step S8；
Step S8, chip body continues to complete communication program.
The present invention discloses a kind of RFID electronic label, and Fig. 5, Fig. 6 are respectively RFID electronic label in one embodiment of the inventionStructural schematic diagram；Fig. 5, Fig. 6 are please referred to, in one embodiment of this invention, RFID electronic label includes above-mentioned RFID corePiece, record coil 9, radio-frequency antenna 10.RFID chip connects radio-frequency antenna 10, and the record coil 9 is separately connected described firstTie point 4, the second tie point 5.
In one embodiment of this invention, the anti-rf analog front-end for opening RFID chip includes the first solder joint, theTwo solder joints, the radio-frequency antenna 10 connect the first solder joint of the RFID chip, the second solder joint.
In one embodiment of this invention, there is the easily broken edge of a knife on the outside of the record coil 9.
In one embodiment of this invention, the RFID electronic label includes anti-unlatching RFID chip, record coil 9, penetratesFrequency antenna 10；The RFID chip includes: rf analog front-end 1, digital logic unit 2, memory 3, the first tie point 4,Two tie points 5 and rewriting circuit 7；The record coil 9 is separately connected first tie point 4, the second tie point 5.
The digital logic unit 2 includes detection circuit 6, and circuit 7 is rewritten in the connection of detection circuit 6, and the rewriting circuit 7 connectsConnect memory 3.
The detection circuit 6 connects the second tie point 5, rewrites circuit 7 and connects the first tie point 4；Connect in the first tie point 4In the state of connecing the second tie point 5, detection circuit 6 rewrites circuit 7, the first tie point 4, the second tie point 5 forming circuit.
The detection circuit 6 detects that the first tie point 4,5 both end voltage of the second tie point or electric current generate to basisFeedback signal extremely rewrites circuit 7.The circuit 7 of rewriting according to the feedback signal of the detection circuit 6 to memory 3 to carry outOpen record information is written in write operation.
The detection circuit 6 detects the voltage or electric current between the first tie point 4, the second tie point 5；If detection circuit 6It detects that the voltage between the first tie point 4, the second tie point 5 is normal value VH, then shows that state is normal；If detection circuit 6It detects that the first tie point 4,5 both end voltage of the second tie point are exceptional value VL, then shows extension circuit part abnormal state, changeWrite circuit 7 carries out write operation to memory 3, and open record information is written.
The radio-frequency antenna 10 connects anti-the first solder joint, second solder joint for opening RFID chip, and radio-frequency antenna 10 isHigh frequency or ultra-high frequency antenna；There is the easily broken edge of a knife on the outside of the record coil 9, be allowed to record antenna and be readily broken, be connected backRoad disconnects.
In one embodiment of this invention, RFID electronic label includes at least the anti-unlatching RFID chip 8, record coil9, radio-frequency antenna 10 and matrix 11.The radio-frequency antenna 10 connects anti-LA and LB endpoint (the i.e. RFID for opening RFID chipTwo terminals of radio-frequency antenna), radio-frequency antenna 10 is high frequency or ultra-high frequency antenna.The use of described matrix 11 paper substrates,Anti- transfer substrate disclosed in CN102982364A；Or antenna is prepared using traditional PET film matter substrate.
Present invention further teaches a kind of commodity provided with RFID electronic label, including above-mentioned RFID electronic label；It is describedThe record coil 9 of RFID electronic label is set at the packaging seal of commodity, and record coil 9 can break after packaging seal is openedIt opens.
In one embodiment of this invention, first tie point 4, the second tie point 5 are respectively arranged at packaging seal 13Two sides, the connecting line between the first tie point 4, the second tie point 5 disconnects after packaging seal 13 is destroyed.
Fig. 7, Fig. 8 are the schematic diagram that RFID electronic label is set to a commodity in one embodiment of the invention；Please refer to Fig. 7,Fig. 8, in one embodiment of this invention, commodity are bottle body.The both ends of record coil 9 are respectively arranged at bottle body packaging seal 13Two sides, record coil 9 can disconnect after packaging seal is opened.
In one embodiment of this invention, structure to specifications designs circuit and prepares anti-unlatching RFID through flowChip 8.By Bonding process, RFID electronic label is prepared by substrate of PET film, the RFID label tag is by anti-unlatching RFIDChip 8, record coil 9 and high-frequency radio frequency antenna 10 form, and have tie point 4 and 5, linkage record on the RFID functional chip 8Coil 9.There are two groups of conducting pins 12, one group is connected to record coil, another group and hyperfrequency i.e. on the RFID functional chipRadio-frequency antenna is connected.This chip collocation small hand held devices use, and according to the sensitivity of equipment and power, adjust extension circuitWith the parameter of chip detecting circuit, VH=3V, VL=1.5V are set.In addition to reaching the mesh that record antenna is readily broken, the easily broken edge of a knife is cut on the outside of record antenna.
When in use, the record antenna of the RFID electronic label is affixed at commodity packaging sealing 13, rest part is located atSealing is with exterior domain (as shown in Figure 7, Figure 8)；When commodity packaging is turned on, spinning movement makes the record coil in electronic tagIt disconnects, rest part is still kept completely, and RFID information read-write capability is normal, but the detection circuit in functional chip will judge this pieceThe record coil of RFID electronic label, which has disconnected and started, rewrites circuit record, which can not change；At this moment this piece of RFID electricitySubtab still can normally be read and write, and consumer can still check its product traceability information by RFID reader and corresponding software,Even if the commodity packaging simultaneously or RFID electronic label are recycled by criminal, can not due to already having in its chipThe record information of change, consumer can identify commodity packaging corresponding to the label by RFID reader and corresponding softwareIt is turned on or was used, to warn consumer, it is ensured that its legitimate rights and interests is not suffered a loss.
Fig. 9, Figure 10 are the schematic diagram that RFID electronic label is set to a commodity in one embodiment of the invention；Please refer to Fig. 9,Figure 10, in one embodiment of this invention, commodity are box body.The both ends of record coil 9 are respectively arranged at bottle body packaging seal 13Two sides, record coil 9 can be disconnected after packaging seal is opened.
In one embodiment of this invention, structure to specifications designs circuit and prepares anti-unlatching RFID through flowChip 8.By Bonding process, RFID electronic label, RFID mark are prepared with anti-transfer substrate disclosed in CN102982364ALabel are made of anti-unlatching RFID chip 8, record coil 9 and super high frequency radio frequency antenna 10, have connection on the RFID functional chip 8Point 4 and 5, linkage record coil 9.There are two groups of conducting pins 12 i.e. on the RFID functional chip, one group is connected to record coil,Another group is connected with super high frequency radio frequency antenna.The handheld device or scanning constant equipment of this chip collocation relatively high power use,According to the sensitivity of equipment and power, the parameter of extension circuit and chip detecting circuit is adjusted, sets VH=1.6V, VL=0V.
When in use, the record coil of the RFID electronic label is affixed on commodity packaging sealing part (such as Fig. 9, Tu10SuoShow), rest part is located at sealing with exterior domain；When commodity packaging is turned on, unlatching pulls power for the note in electronic tagRecord coil tears disconnection, and rest part is still kept completely, and RFID information read-write capability is normal, but the detection circuit in RFID chipThe record coil for judging this piece of RFID electronic label has been disconnected and has been started and has rewritten circuit record, which can not change；At this momentThis piece of RFID electronic label still can normally be read and write, and consumer still can check its product by RFID reader and corresponding softwareTrace to the source information, while even if the commodity packaging or RFID electronic label are recycled by criminal, due in its chipIt is provided with not modifiable record information, consumer can be identified corresponding to the label by RFID reader and corresponding softwareCommodity packaging has been turned on or used, to warn consumer, it is ensured that its legitimate rights and interests is not suffered a loss.
In conclusion RFID chip proposed by the present invention, RFID electronic label, commodity, RFID electronic label is when in useRecord antenna is placed in commodity packaging sealing part, and read-write antenna and functional chip are located at sealing with exterior domain, work as commodity packagingWhen being turned on, the record antenna loop of label is destroyed disconnection, and read-write antenna and chip are not destroyed and fully functional.
Due to having the logic for judging to record antenna and whether being connected in the functional chip of RFID electronic label of the present inventionCircuit, and record antenna conducting circuit disconnection and record and can not change, after the RFID electronic label is used for commodity packaging,In chip operation, when such as recording antenna, read-write antenna and complete chip, electronic tag is worked normally；When commodity packaging quiltAfter unlatching, record antenna conducting circuit is disconnected, and read-write antenna and chip are still complete, and the read-write capability of electronic tag is stillIt is so normal, but its record antenna can be recorded and be disconnected and record and can not change again, accordingly even when this piece of RFID electronic labelOr the commodity packaging with this piece of RFID electronic label is recycled by criminal again, consumer can also by reader andCorresponding software identifies that commodity packaging corresponding to the label has been turned on or used, in favor of protecting the legal power of consumerBenefit.
RFID electronic label of the invention has the characteristic of anti-unlatching, based on information record and feedback function, records non-awardUnlatching behavior is weighed, to realize the function of preventing unauthorized unlatching.
Description and application of the invention herein are illustrative, is not wishing to limit the scope of the invention to above-described embodimentIn.The deformation and change of embodiments disclosed herein are possible, the realities for those skilled in the artThe replacement and equivalent various parts for applying example are well known.It should be appreciated by the person skilled in the art that not departing from the present inventionSpirit or essential characteristics in the case where, the present invention can in other forms, structure, arrangement, ratio, and with other components,Material and component are realized.Without departing from the scope and spirit of the present invention, can to embodiments disclosed herein intoThe other deformations of row and change.