CN102855516A - Anti-theft electronic tag - Google Patents
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- CN102855516A CN102855516A CN201210256464XA CN201210256464A CN102855516A CN 102855516 A CN102855516 A CN 102855516A CN 201210256464X A CN201210256464X A CN 201210256464XA CN 201210256464 A CN201210256464 A CN 201210256464A CN 102855516 A CN102855516 A CN 102855516A
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Abstract
The invention discloses an anti-theft electronic tag. The electronic tag comprises a power module, a radio frequency module, a tearing perceiving module, a main control module and a storing module, wherein the power module supplies power for the electronic tag, the tearing perceiving module is used for perceiving tearing state information of the electronic tag, the main control module receives the tearing state information sent by the tearing perceiving module and controls the radio frequency module to send tag identification information, the storing module stores the tag identification information to be sent when a reader is powered down, and the tearing perceiving module comprises a photosensitive detection unit or a broken line detection unit. The electronic tag can perceive and trigger the main control module to send corresponding tag identification information through the photosensitive detection unit or the broken line detection unit when the electronic tag is torn off, is far in reading distance, low in power consumption and long in service life of batteries per unit capacity.
Description
Technical field
The invention belongs to wireless radio frequency discrimination RFID electronic tag field, but relate in particular to a kind of low-power consumption RFID theft-proof electron label that the tear-off perception is also reported to the police after article surface is installed.
Background technology
The RFID technology is take radio-frequency signal as carrier, by reader to pasting/be installed in the automatic identification of the electronic tag on the article, thereby obtain the related data of these article, the identification verification process carries out automatically, advantages such as having noncontact, non-ly visually read, reading speed is fast, can a plurality of electronic tags read simultaneously can be applicable in the various rugged surroundings such as greasy dirt, dust, high temperature.
It is strong that RFID electronic tag persistence, the information of utilizing radio frequency chip to make receives the propagation penetrability, and the storage information capacity is large and kind is many.Have or not powered battery when the RFID electronic tag of commercial Application is according to work at present, can be divided into passive electronic label and active electronic label, passive electronic label is cheap, but reading efficiency is low, and it is limited to read distance, and active electronic label reads distance, antijamming capability is strong, can connect sensor, remedy the deficiency of passive electronic label, its major defect is work need powered battery, volume is large, price is high, be subjected to that battery life affects service time etc.Long distance reads common employing active electronic label, therefore for active electronic label, how to reduce power consumption, prolongs its life-span, reduces cost, is the emphasis of active electronic label research always.
The patent No. is the Chinese invention patent of CN98105827.2, and it discloses a kind of anti-theft tag that adopts push switch, and when label was torn, the push switch action produces reported to the police.But it belongs to the mechanical type device, and the structure relative complex is higher to the label hardware requirement, and only plays the effect of onsite alarming, the function that does not have the article relevant information to send.
Publication number is that the Chinese invention patent application of CN102013034A discloses RFID electronic tag of a kind of anti-tear-off and preparation method thereof, mainly is comprised of surfacing, adhesive sticker, antenna, compound adhesive, leadframe antenna, RFID chip, release base stock.After being affixed on the article, it just can not be stripped from again use, in case be stripped from, antenna and leadframe antenna are destroyed will separate because acting force difference and inertia effect will make, and the RFID label antenna lost efficacy and can't reuse, and this patent of invention can prevent that electronic tag from being utilized again.
The patent No. is that 200910251275.1 Chinese invention patent discloses a kind of RFID electronic tag in object exterior pasting rear defence tear-off, the ingenious bonding strength that adhesive glue is set, when artificial tear-off electronic tag, the surface layer of electronic tag, PET substrate layer, the metal film antenna stack can be by whole tear-off, but, the RFID chip can be retained in the surface of identified object, produces circuit between the antenna body that causes electronic tag and the RFID chip and separates, and electronic tag can't shift use again.
Publication number is the anti-tear-off RFID label that the Chinese invention patent application of CN102129597A discloses a kind of employing super glue for the plastic and glass goods, super glue is spread upon the RFID label uniformly to be had on the one side of antenna, since super glue to the bounding force of antenna greater than PET material in the RFID label to the bounding force of antenna, antenna is destroyed when removing the RFID label falls, the RFID label is damaged, guaranteed namely can't re-use after label is torn.
The patent No. is that 200480010638.8 Chinese invention patent discloses a kind of anti-theft tag and antitheft method of article, a kind of anti-theft tag has been proposed, this label is comprised of the sandwich construction of theft protection element, overlayer and label, by selecting the cementing agent of different cohesive strengths, so that label when being torn theft protection element be not easy to be torn, thereby realize anti-theft feature.
As seen, prior art is considered from the angle of manufacture craft mostly mainly for passive electronic label, lays particular emphasis on the disposable of realizing electronic tag, reads near distance.In asset management, usually utilize reader to read the label that sticks on the article and inquire about the article state, if the electronic tag of article comes off or by the people for tearing, can cause losing of Item Information, and might cause false article " in place " information, can not in the stolen situation of article, reach alarm; When the reader power down, can not in time receive the information that label sends, if label, can cause losing of Item Information during the power down without memory function.
Summary of the invention
The objective of the invention is for solving above-mentioned problems of the prior art, provide a kind of theft-proof electron label with tear-off warning function, but perception is in time sent to reader with tear-off information by tear-off.
The invention provides a kind of theft-proof electron label, be included as the power module of described electronic tag power supply, and wireless radio frequency modules, described theft-proof electron label also comprises the tear-off sensing module for the described electronic tag tear-off of perception status information, and receives the tear-off status information of described tear-off sensing module transmission and control the main control module that described wireless radio frequency modules sends tag identifier information.
Further, described electronic tag also comprises memory module, is used for storing tag identifier information to be sent.When the reader power down, can't in time read the tag identifier information that electronic tag sends, at this moment, store tag identifier information to be sent into memory module, by the time when reader has electricity to recover normal operation, again from memory module reading tag identification information, and send to reader, avoided the information dropout that causes owing to the reader operation irregularity.
Further, described tear-off sensing module comprises photosensitive detecting unit and burn out detection unit, or only comprises photosensitive detecting unit, or only comprises the burn out detection unit.Described photosensitive detecting unit is provided with photodiode, when described electronic tag by tear-off, described photodiode conducting triggers the described wireless radio frequency modules of described master control module controls and sends tag identifier information with described electronic tag tear-off status information.Described burn out detection unit is provided with a wire, when described electronic tag by tear-off, described wire dropping triggers the described wireless radio frequency modules of described master control module controls and sends tag identifier information with described electronic tag tear-off status information.Electronic tag of the present invention adopts photosensitive detecting unit and burn out detection unit to realize that the tear-off perceptional function is in order to remedy the deficiency of two kinds of detection methods simultaneously, in the environment of dark, photosensitive detecting unit is inoperative, and the burn out detection unit can remedy this drawback just; As time goes on, the bounding force of bonding agent can weaken, and has the possibility of self falling, adopts photosensitive detecting unit just can remedy this drawback.
When adopting photosensitive detecting unit, described electronic tag also is provided with for the box lighttight with cover that covers the tear-off sensing module, the box of described box covers is making a call to a circular hole that adapts with described photodiode over against the photodiode place of described tear-off sensing module, the glass envelope that exposes described photodiode, the outside surface of the top of glass envelope and described box lid maintains an equal level.The box that exposes glass envelope covers this simultaneously is close to target item, guarantee that photodiode loses light when electronic tag sticks on the target item surface, thereby when making electronic tag by tear-off, photodiode can be seen rapidly light and trigger electronic tag transmission tag identifier information.
When adopting the burn out detection unit, be coated with on the described wire and be useful on the seccotine of the sticking note of described wire to target item corresponding to electronic tag, be convenient to when described electronic tag during by tear-off, only has described electronic tag by tear-off, and described wire is by tear-off, realizes separating of described wire and described electronic tag.
Further, described main control module is provided with timer, and after the timer timing arrived, main control module, wireless radio frequency modules were triggered and wake-up, and enter communications status, sent tag identifier information.If electronic tag, sends normal tag identifier information not by tear-off; If electronic tag is by tear-off, last mode bit of tag identifier information changes, and the tag identifier information after the transmission state changes is to reader.
Theft-proof electron label disclosed by the invention adopts main control module, wireless radio frequency modules, utilize software to realize main control module, the work-dormancy mechanism of wireless radio frequency modules uniqueness and the data communication mode of simplification, so that the power consumption of electronic tag is extremely low, prolong battery, reduced maintenance cost; Adopt the design of light activated element and wire to characterize the state of electronic tag, whether label in time can be informed reader by tear-off information; Adopt memory module, the preservation problem of label information when having solved the reader power down.
Theft-proof electron tag read distance of the present invention is far away, and power consumption is lower, and the unit capacity battery is long, but perception is in time sent to reader with tear-off information by tear-off.
Description of drawings
Fig. 1 is the structured flowchart of electronic tag of the present invention;
Fig. 2 is the equivalent circuit diagram of electronic tag of the present invention;
Fig. 3 is that the present invention is with photosensitive detecting unit electronic tag synoptic diagram;
Fig. 4 is that the present invention is with burn out detection unit electronic tag synoptic diagram.
Embodiment
Below in conjunction with drawings and Examples technical solution of the present invention is described in further details, following examples do not consist of limitation of the invention.
As shown in Figure 1, theft-proof electron label 1 of the present invention communicates by wireless with reader 7, and electronic tag 1 comprises: power module 2, tear-off sensing module 3, main control module 4, wireless radio frequency modules 5 and memory module 6.
Wherein power module 2 links to each other with other modules, is whole electronic tag 1 power supply;
Tear-off sensing module 3 is used for the tear-off state of perception electronic tag 1, and with the tear-off state information notification to main control module 4, main control module 4 is according to the tear-off status information of the electronic tag 1 that receives, control wireless radio frequency modules 5 sends corresponding tag identifier information.
Particularly, when tear-off sensing module 3 perceives electronic tag 1 by tear-off, electronic tag 1 is sent to main control module 4 by the tear-off status information, and main control module 4 control wireless radio frequency modules 5 send and comprise that electronic tag 1 is by the tag identifier information of tear-off status information.If electronic tag 1 is in normal condition, then main control module 4 control wireless radio frequency modules 5 send normal tag identifier information.
Particularly, as a kind of mode of the present invention, tear-off sensing module 3 comprises photosensitive detecting unit and burn out detection unit.During the electronic tag normal operation, photosensitive detecting unit loses light, when electronic tag 1 by tear-off, the exposure of photosensitive detecting unit, then trigger main control module 4 work, main control module 4 control wireless radio frequency modules 5 are sent and are comprised that electronic tag 1 is by the tag identifier information of tear-off status information.Simultaneously, during the electronic tag normal operation, burn out detection unit by using one wire is in parallel with resistance, power module 2 is linked to each other with main control module 4, when electronic tag 1 during by tear-off, wire is broken, 4 work of burn out detection unit triggers main control module, and main control module 4 control wireless radio frequency modules 5 are sent and are comprised that electronic tag 1 is by the tag identifier information of tear-off status information.
Need to prove; tear-off sensing module 3 can have photosensitive detecting unit and burn out detection unit simultaneously; even like this under the environment of dark; when bright detecting unit can't work; still can provide anti-theft function by the burn out detection unit; both collaborative works are for electronic label burglary provides duplicate protection.Also can only adopt separately photosensitive detecting unit or burn out detection unit, a kind of theft-proof electron label of mode is provided.
Further, electronic tag 1 of the present invention also comprises memory module 6, be used for when reader 7 power down, can't in time read the tag identifier information that electronic tag 1 sends, at this moment, store tag identifier information to be sent into memory module 6, when device 7 to be read has electricity to recover normal operation, again from memory module 6 reading tag identification informations, and send to reader 7, thereby the label identification information loses in the time of can avoiding reader 7 power down.
Further, main control module 4 is provided with timer, and after the timer timing arrived, main control module 4, wireless radio frequency modules 5 were triggered and wake-up, and enter communications status, sent tag identifier information.If electronic tag 1, sends normal tag identifier information not by tear-off; If electronic tag 1 is by tear-off, last mode bit of tag identifier information changes, and the tag identifier information after the transmission state changes is to reader 7.
Need to prove that last position of tag identifier information is mode bit, the tear-off state of expression electronic tag 1, when electronic tag 1 was normal, last position be normally, for example is 0, when electronic tag 1 during by tear-off, last show state is by tear-off, for example is 1.
Below embodiment by Fig. 2, come the present invention is carried out further concrete the elaboration.Power module 2 is selected button cell CR3032, it is 5mm photodiode, a wire and the resistance of PT333-3C that tear-off sensing module 3 is selected model, main control module 4 adopts super low power consuming single chip processor MSP430F2012, wireless radio frequency modules 5 is selected the 2.4GHz radio transmitting and receiving chip nRF24L01 that only needs few peripheral cell, antenna adopts reversed F-typed PCB antenna, the EEPROM storage chip 25LC640 that memory module 6 adopts with the SPI serial communication interface.
Referring to Fig. 2, tear-off sensing module 3 photosensitive detecting units comprise a 5mm photodiode LitD, and resistance R 1, R2 and triode Q3, the positive pole of bright diode LitD links to each other with the base stage of triode Q3, the negative pole of bright diode LitD links to each other with power module 2 by resistance R 1, the grounded emitter of triode Q3, the collector of Q3 links to each other with power module 2 by resistance R 2, and the collector of triode Q3 is connected with the pin P2.6 of main control module 4 simultaneously.
Photosensitive detecting unit is connected with the pin P2.6 of main control module MSP430F2012, electronic tag 1 is in the tag identifier information of reader 7 transmissions, last bit table is levied the state (whether seeing light) of photodiode, it also is the state (whether by tear-off) of electronic tag 1, during electronic tag 1 normal operation, photodiode loses light, there is not conducting, the Q3 cut-off, pin P2.6 is high level, last mode bit of tag identifier information is 0, and electronic tag 1 sends normal tag identifier information to reader 7; If electronic tag is by tear-off, photodiode sees that photoconduction is logical, the Q3 conducting, and pin P2.6 saltus step is low level, and last mode bit of tag identifier information becomes 1, and electronic tag 1 is 1 tag state information to reader 7 last states of transmission.
Tear-off sensing module 3 burn out detection unit comprise resistance R 3 and the R4 that is connected between power module 2 and the ground, also comprise a wire in parallel with resistance R 3, and the B point between resistance R 3 and the R4 is connected in pin P2.7 through resistance R 5 and main control module 4.Under normal circumstances, because R3 is by short circuit, the voltage that B is ordered is VDD substantially, and pin P2.7 is high level; Short-circuit conductors when between A, B is destroyed, the voltage that B is ordered is the dividing potential drop of VDD on R4, less than 1V, pin P2.7 becomes low level, last mode bit of tag identifier information becomes 1, it is 1 tag state information that electronic tag 1 sends last states to reader 7, informs the tear-off information of reader 7 electronic tags 1, has realized electronic tag 1 tear-off perception and warning function.The burn out detection unit has solved photosensitive detecting unit to the Dependence Problem of light, has guaranteed the normal operation of (such as evening) electronic tag 1 when unglazed.
Select low-power scm MSP430F2012 and the few radio transmitting and receiving chip nRF24L01 of required peripheral cell at hardware.The MSP430F2012 cost performance is high, adopts two to overlap independently clock source, has LPM0, LPM1, LPM2, LPM3, five kinds of energy saver modes of LPM4.By software programming, make single-chip microcomputer MSP430F2012 be in the time maximization of LPM3 low-power consumption mode, reduce to greatest extent system power dissipation.
NRF24L01 has 20 pins, adopts SPI serial communication interface and the MSP430F2012 of standard to carry out communication, and this interface comprises two data lines MOSI and MISO, a clock line SCK.The SCK pin of nRF24L01 is connected with the SCLK port of MSP430F2012, keeps both clock synchronous, and Enable Pin CSN is connected to an I/O mouth of MSP430F2012 (P1.4).By software programming, reusable pin MOSI, MISO, SCLK and CSN make the main state of communication carry out simple 3 an attitudes control, i.e. dormancy, free time, reception and transmission.By the dormancy time of maximization MSP430F2012 and nRF24L01, reach the purpose that reduces system power dissipation, prolong the serviceable life of battery, reduce maintenance cost.
The storage chip 25LC640 that memory module 6 adopts with serial communication interface, 25LC640 also communicates by SPI serial communication interface and the MSP430F2012 of standard, and its Enable Pin CS is connected to MSP430F2012I/O mouth (P2.7).When reader 7 power down, the information of in time reading electronic labels 1 transmission, at this moment, MSP430F2012 stores tag identifier information to be sent into 25LC640, when device 7 to be read has electricity to recover normal operation, send to reader again from 25LC640 reading tag identification information, and by nRF24L01, prevented that effectively reader 7 power down from causing losing of tag identifier information.
The installation of electronic tag 1 of the present invention need be considered the characteristics of two parts of photosensitive detecting unit and burn out detection unit of tear-off sensing module 3, for photosensitive detecting unit, referring to Fig. 3, need electronic tag 1 is contained in the lighttight box with cover, and make a call to a circular hole a at the box lid over against the photodiode place of tear-off sensing module 3, the glass envelope that exposes photodiode, the outside surface A of the top of glass envelope and box lid maintains an equal level, and assurance label box lid can be close to article surface.When mounted, box and box covered tightly buckle, and the face A of punching is closely pasted with the target item that is identified, photodiode loses light when guaranteeing electronic tag 1 normal operation.
And when considering the burn out detection unit, electronic tag 1 can be divided into two parts to finish installation, a part is the main part of electronic tag 1, another part is that " anti-tear-off " connects wire, referring to Fig. 4.At first select flat to connect wire A ' B ', exposed joint A ' and B ', adopting seccotine will connect wire A ' B ' pastes on the target item, then adopt the lower slightly bonding agent of bond strength that the box of electronic tag is pasted on the target item, note main part A, the B of electronic tag corresponding with A ', B ' that " anti-tear-off " connects in the wire respectively.Two joint A ' that use conductive paste to be coated in during implementation to connect wire and B ' guarantee that the electrical contact of A and A ', B and B ' is good on every side.Connect and to be connected wire when bond strength higher between wire and the target item has guaranteed that label is torn and not to be torn, realized that the connection wire separates with the circuit of electronic tag.
Theft-proof electron label 1 among the present invention under normal circumstances, electronic tag 1 sticks on the target item that is identified, this moment, photodiode loseed light, wire is not by tear fracture, pin P2.6 and the P2.7 of corresponding main control module 4 are high level, main control module 4 is provided with timer work, and label is in dormant state, and power consumption is extremely low; After main control module 4 timer timing T arrived, main control module 4, wireless radio frequency modules 5 were triggered and wake-up, and enter communications status, sent tag identifier information.If electronic tag, sends normal tag identifier information not by tear-off; If electronic tag is by tear-off, photodiode sees that photoconduction is logical, pin P2.6 is low level, and wire is impaired, and pin P2.7 is low level, and last mode bit of tag identifier information changes, be that 1 tag state information sends to reader 7 with last state, electronic tag 1 sends and could reset to electronic tag 1 after tag identifier informational needs staff verifies, thereby when guaranteeing the situation of article abnormal and alarm, avoids article " in place " information of falseness.
Above embodiment is only in order to technical scheme of the present invention to be described but not limit it; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. theft-proof electron label, be included as the power module of described electronic tag power supply, and wireless radio frequency modules, it is characterized in that, described theft-proof electron label also comprises the tear-off sensing module for the described electronic tag tear-off of perception status information, and receives the tear-off status information of described tear-off sensing module transmission and control the main control module that described wireless radio frequency modules sends tag identifier information.
2. theft-proof electron label as claimed in claim 1 is characterized in that, described electronic tag also comprises memory module, is used for storing tag identifier information to be sent.
3. theft-proof electron label as claimed in claim 1 is characterized in that, described tear-off sensing module comprises photosensitive detecting unit and burn out detection unit.
4. theft-proof electron label as claimed in claim 1 is characterized in that, described tear-off sensing module comprises photosensitive detecting unit.
5. theft-proof electron label as claimed in claim 1 is characterized in that, described tear-off sensing module comprises the burn out detection unit.
6. such as claim 3 or 4 described theft-proof electron labels, it is characterized in that, described photosensitive detecting unit is provided with photodiode, when described electronic tag by tear-off, described photodiode sees that photoconduction is logical, triggers the described wireless radio frequency modules transmission of described master control module controls with the tag identifier information of described electronic tag tear-off status information.
7. such as claim 3 or 5 described theft-proof electron labels, it is characterized in that, described burn out detection unit is provided with a wire, when described electronic tag by tear-off, described wire dropping triggers the described wireless radio frequency modules transmission of described master control module controls with the tag identifier information of described electronic tag tear-off status information.
8. electronic tag as claimed in claim 6, it is characterized in that, described electronic tag also is provided with for the box lighttight with cover that covers the tear-off sensing module, the box of described box covers is making a call to a circular hole that adapts with described photodiode over against the photodiode place of described tear-off sensing module, the glass envelope that exposes described photodiode, the outside surface of the top of described glass envelope and the box of described box lid maintains an equal level.
9. electronic tag as claimed in claim 7, it is characterized in that, be coated with on the described wire and be useful on the seccotine of the sticking note of described wire to target item corresponding to electronic tag, be convenient to when described electronic tag during by tear-off, only has described electronic tag by tear-off, and described wire is by tear-off, realizes separating of described wire and described electronic tag.
10. such as the described electronic tag of the arbitrary claim of claim 1-5, it is characterized in that described main control module is provided with timer, after arriving for timing, trigger the described wireless radio frequency modules of described master control module controls and send tag identifier information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210256464XA CN102855516A (en) | 2012-07-24 | 2012-07-24 | Anti-theft electronic tag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210256464XA CN102855516A (en) | 2012-07-24 | 2012-07-24 | Anti-theft electronic tag |
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| CN102855516A true CN102855516A (en) | 2013-01-02 |
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| CN201210256464XA Pending CN102855516A (en) | 2012-07-24 | 2012-07-24 | Anti-theft electronic tag |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104182792A (en) * | 2014-08-06 | 2014-12-03 | 成都九洲电子信息***股份有限公司 | Disassembling-proof 2.45GHz active tag with electronic lock |
| CN104200259A (en) * | 2014-08-07 | 2014-12-10 | 上海羿龙实业有限公司 | Anti-theft electronic source tag |
| CN104408853A (en) * | 2014-11-06 | 2015-03-11 | 大唐微电子技术有限公司 | Anti-theft system of public goods and anti-theft method thereof |
| CN105449661A (en) * | 2015-12-23 | 2016-03-30 | 珠海格力电器股份有限公司 | Protection circuit and method for pure-resistance load loops |
| CN107896424A (en) * | 2017-11-30 | 2018-04-10 | 苏州斯普兰蒂电子有限公司 | POS is anti-to tear circuit board and the anti-preparation method for tearing circuit board of POS |
| CN107980143A (en) * | 2015-04-16 | 2018-05-01 | 西贝尔资产管理研究有限公司 | The management of protected article |
| CN108596315A (en) * | 2018-05-11 | 2018-09-28 | 上海宜链物联网有限公司 | A kind of RFID label chip circuit for preventing from reusing after tearing to pieces |
| CN109447215A (en) * | 2018-12-23 | 2019-03-08 | 东莞市建设工程检测中心 | A kind of the Electronic Testing label and test method of concrete test block |
| CN113988248A (en) * | 2021-11-09 | 2022-01-28 | 中国科学院上海高等研究院 | RFID tag chip circuit with impedance monitoring function and monitoring method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104182792A (en) * | 2014-08-06 | 2014-12-03 | 成都九洲电子信息***股份有限公司 | Disassembling-proof 2.45GHz active tag with electronic lock |
| CN104200259A (en) * | 2014-08-07 | 2014-12-10 | 上海羿龙实业有限公司 | Anti-theft electronic source tag |
| CN104408853A (en) * | 2014-11-06 | 2015-03-11 | 大唐微电子技术有限公司 | Anti-theft system of public goods and anti-theft method thereof |
| CN107980143A (en) * | 2015-04-16 | 2018-05-01 | 西贝尔资产管理研究有限公司 | The management of protected article |
| CN105449661A (en) * | 2015-12-23 | 2016-03-30 | 珠海格力电器股份有限公司 | Protection circuit and method for pure-resistance load loops |
| CN107896424A (en) * | 2017-11-30 | 2018-04-10 | 苏州斯普兰蒂电子有限公司 | POS is anti-to tear circuit board and the anti-preparation method for tearing circuit board of POS |
| CN108596315A (en) * | 2018-05-11 | 2018-09-28 | 上海宜链物联网有限公司 | A kind of RFID label chip circuit for preventing from reusing after tearing to pieces |
| CN108596315B (en) * | 2018-05-11 | 2021-07-13 | 上海宜链物联网有限公司 | RFID label chip circuit capable of preventing repeated use after tearing |
| CN109447215A (en) * | 2018-12-23 | 2019-03-08 | 东莞市建设工程检测中心 | A kind of the Electronic Testing label and test method of concrete test block |
| CN109447215B (en) * | 2018-12-23 | 2022-02-18 | 东莞市建设工程检测中心 | Electronic test tag and test method for concrete test block |
| CN113988248A (en) * | 2021-11-09 | 2022-01-28 | 中国科学院上海高等研究院 | RFID tag chip circuit with impedance monitoring function and monitoring method thereof |
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Application publication date: 20130102 |