CN104715277A - Active anti-counterfeit radio frequency tag for monitoring food state in logistics process - Google Patents
Active anti-counterfeit radio frequency tag for monitoring food state in logistics process Download PDFInfo
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- CN104715277A CN104715277A CN201510154758.5A CN201510154758A CN104715277A CN 104715277 A CN104715277 A CN 104715277A CN 201510154758 A CN201510154758 A CN 201510154758A CN 104715277 A CN104715277 A CN 104715277A
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- 238000000034 method Methods 0.000 title description 17
- 230000008569 process Effects 0.000 title description 12
- 238000012544 monitoring process Methods 0.000 title description 3
- 239000010410 layer Substances 0.000 claims abstract description 40
- 238000003860 storage Methods 0.000 claims abstract description 11
- 239000012790 adhesive layer Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 6
- ZOMSMJKLGFBRBS-UHFFFAOYSA-N bentazone Chemical compound C1=CC=C2NS(=O)(=O)N(C(C)C)C(=O)C2=C1 ZOMSMJKLGFBRBS-UHFFFAOYSA-N 0.000 claims description 3
- 229920006300 shrink film Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 10
- 235000021393 food security Nutrition 0.000 description 11
- 230000032258 transport Effects 0.000 description 9
- 238000007726 management method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
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- 239000004831 Hot glue Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
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- 235000012631 food intake Nutrition 0.000 description 1
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- 231100001261 hazardous Toxicity 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
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- 238000005057 refrigeration Methods 0.000 description 1
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- 235000013311 vegetables Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 235000013618 yogurt Nutrition 0.000 description 1
Abstract
The invention provides an active radio frequency tag. The active radio frequency tag comprises an anti-counterfeit film layer, an auxiliary circuit layer, an adhesive layer, an IC layer and a sensor layer orderly from bottom to top, wherein the anti-counterfeit film layer is used for packaging the radio frequency tag and provided with a printed antenna connected with the IC layer; the adhesive layer is glued with the anti-counterfeit film layer and the IC layer; the IC layer comprises an IC chip for performing non-contact reading and writing of data; the auxiliary circuit layer comprises a data memory and an auxiliary circuit; one part of the auxiliary circuit layer is arranged on the inner side of the anti-counterfeit film layer; the sensor layer comprises a sensor for detecting external environment parameters. The active radio frequency tag is characterized in that a data communication line is arranged between the memory and the IC chip for reading and writing data, the memory is provided with one part of a public key for encryption, the data memory is provided with the other part of the corresponding public key; the sensor is used for starting the storage work when the external environment parameters are greater than or smaller than a series of preset values, and writing the sensed data to the memory by use of the auxiliary circuit.
Description
Technical field
The invention belongs to logistics field, relate to and logistics monitoring is carried out to transport product state, more specifically, relate to and be a kind ofly applied to the active radio frequency label (RFID) that in Food Logistics process, structure is simple, have higher security feature, can monitor each state that the transport product such as food experience in transportation.
Background technology
Existence, the economy of people ' s health soar steadily, social harmony progress, and these moment all be unable to do without food, be unable to do without the food of safety, health, nutrition., since reform and opening-up, the food service industry of China enters develop rapidly period, has occurred that supply capacity expands rapidly, the trend such as supplying products diversity increase.Nowadays, food service industry accounts for the very large proportion of national economy, and it has become the living standard improving the people and the mainstay industry increasing China's national income.As the transit link of food, Food Logistics arises at the historic moment.
Food Logistics is exactly Food circulation, but along with expanding economy, the scope of its indication widely, comprises a series of activities such as food transport, storage, dispensing, handling, keeping, logistic information management.Food Logistics, for other industry logistics, has the advantages that it is outstanding: one is nutritional labeling in order to ensure food and foodsafety, and Food Logistics requires high level of cleanliness health, has higher requirements to logistics equipment and staff simultaneously; Two is because food has specific freshness date and shelf-life, and Food Logistics has strict standard to product time of delivery and preposition phase; Three be Food Logistics to external world environment have particular/special requirement, such as suitable temperature and humidity; Four is that fresh food and frozen food occupy very large proportion in food consumption, so Food Logistics must have corresponding cold chain.In the supply chain of food enterprise, ensure that the important step---Food Logistics---of food quality is a significant process in agri-food supply chains.The task that Food Logistics is born is arduous, and its logistics progress has special requirement, and such as temperature, time, illuminance etc. have more concrete requirement.
In prior art, ensure that the means of food security in Food Logistics process mainly contain following three aspects:
(1) the disposable bar code (or claiming " bar shaped security code ") made during employing manufacturer production food.In this way, the true and false of this product can be learnt at sales section.But this technological means mainly relies on paper base material, or antiforge ink, or design anti-counterfeit structure and outward appearance, utilize the modes such as unified false proof numbering.There is a lot of defect in this mode: first, and for cost consideration, the bar code that production firm generally provides all easily is imitated and forges.Owing to using the marks such as the bar code of imitation, much poisonous and hazardous food such as poisonous meat and goods thereof, poisonous rice, poisonous vegetables, poisonous tealeaves, beverage inferior and potable water, edible oil inferior, flavouring inferior etc. are found successively, cause the malignant event of personal injury to happen occasionally; Secondly, the information category that bar code can provide is single, generally only has the essential information such as production firm or date of manufacture, and food consumers cannot make any conclusion about food freshness, safe coefficient by limited information accordingly.
(2) a safe and reliable environment is provided to food transport.Such as, quick-frozen food is very strict to Storage Requirement.What the patent that notification number is CN1072792C provided is exactly the logistics equipment that a kind of multi-temp. article delivers without refrigerating power, with the refrigeration degree giving transported food enough.By the external environment controlled in Food Logistics process, Here it is ensures that food etc. transports an exemplary of the safety of product.But in logistics link, which kind of standard this environment can reach on earth is had no way of learning, make the food of some no problems that dispatch from the factory due to the storage and transport that occur in logistics improper and greatly reduce quality, even may bring rotten potential hazard to food.This has carried out huge hidden danger also to food securing band.
(3) strong Conservation environment is provided at sales sections such as supermarkets.Such as, the dairy products such as Yoghourt all need to be kept at low temperature environment and carry out storing and selling.But the environment that businessman provides is often very different, consumer cannot obtain the powerful guarantee to this food security information when buying.
In logistics field, the application of RFID is increasingly extensive.RFID technique has wide application market, and this technology is a kind of contactless automatic identification technology, and it automatically identifies destination object by radiofrequency signal and obtains related data, and the work of identification need not manual intervention, can work in various rugged surroundings.RFID technique identifiable design high-speed moving object also can identify multiple label simultaneously, swift and convenient to operate.RFID technique is applied to false proof, be people in the industry make great efforts study direction.REID is false proof, with other anti-counterfeiting technologies as compared with the technology such as laser anti-counterfeit, digital anti-counterfeiting, its advantage is: each label has the only id number in a whole world---UID, UID are placed in ROM when making chip, cannot revise, cannot copy; Mechanical is worn and torn, anti-fouling; Read write line has directly not open to final user physical interface, ensures the security of himself; Secure data area is except the cryptoguard of label, and data division can with some algorithm realization safety managements; The process etc. of mutual certification is there is between read write line and label.
Compared with the bar codes technique of present widespread use, RFID, except saving manual operation, also has waterproof, antimagnetic, high temperature resistant, long service life, reading apart from the advantage such as large.In addition, because the data in radio-frequency (RF) tag can be encrypted, store data capacity large, and storage information can be changed, thus it is more extensive than the range of application of bar code, uses also more convenient.Supplier can by the details input radio frequency label of the commodity such as marque, original producton location, manufacturer and product batches, when labeled container is through reader, product data are just passed to reader by label, reader downloads data to central processing unit again, generates enterprise's bill of goods management database.Like this, commodity can be well understood to from the process of producing, be transported to sale and be held, thus make buying, storage, delivery process more convenient.
Publication number is that the patent application of CN1952951A discloses a kind of safety management system being reviewed food security and quality information by RFID technique, tracing information in this system is set up by the sensor integrated with read write line, the acquisition of this food security information is the computer system acquisition by being connected to database, and this read write line is independent of RFID.This system is when obtaining tracing information, need to provide a network environment for the acquisition of this tracing information, that is: when after the sensor senses of information by read write line end such as temperature, humidity, degree of ventilation, penetrability, this information will be stored into food security database by network environment.And this application towards customer group object be foods supervision department.As the buyer of food---the numerous consumer groups can not obtain these food security information easily and efficiently.Secondly, the framework of this system is complicated, and the device category of needs is many, debugging and safeguard all inconvenient, is unfavorable for applying on a large scale.In addition, system disclosed in this application does not consider the security of information, once database is modified, the information of so whole food security will be completely unreliable, especially, after food export is gone abroad, dealer is not generally equipped with this food database equipment extra accordingly, like this, food security data are just interrupted in logistics progress, cause consumer's interests to obtain effective guarantee.
Therefore, in order to set up the dynamic digitalized false proof and logistics supervision flow covering overall process, food security logistics information is convenient, quickly in dedicating the consumer that each wants to buy this food to, simultaneously, reduce vast dealer and set up complicated supervisory system with the required cost that ensures food safety, more in order to strengthen the food security of export food, the present invention proposes and be a kind ofly applied in Food Logistics process, structure is simple, there is higher security feature, the radio-frequency (RF) tag (RFID) of each state that the transport product such as food experience in transportation can be monitored.
Summary of the invention
The invention provides and be a kind ofly applied to the active radio frequency label (RFID) that in Food Logistics process, structure is simple, have higher security feature, can monitor each state that the transport product such as food experience in transportation.Can realize dispatching from the factory from finished product to food by this radio-frequency (RF) tag, transport, store in a warehouse, provide and deliver, added, final sales, even the link such as handling return is monitored in real time, can provide fast to consumer, food security information accurately, and realize the intelligent management of logistics.
For the encryption of radio-frequency (RF) tag, the encryption key pair (PKI) that Public Key Cryptographic Systems adopts and decryption key spoon (private key) are different.Disclosed in encryption key pair is, the distribution of key and management are just very simple, such as the network with n user, only need 2n key.Public Key Cryptographic Systems can also realize digital signature easily.Therefore, E-business applications needs are best suited for.
The present invention is achieved through the following technical solutions:
A kind of active radio frequency label, comprise false proof rete successively from bottom to up, auxiliary circuit layer, adhesive layer, IC layer and sensing layer, wherein, false proof rete encapsulates this radio-frequency (RF) tag and has the printed antenna be connected with IC layer, the bonding false proof rete of adhesive layer and IC layer, IC layer comprises and carries out the untouchable IC chip read and write data, auxiliary circuit layer comprises data-carrier store and auxiliary circuit, a part for this auxiliary circuit layer is placed in inside false proof rete, sensor layer comprises the sensor detecting external environment parameters, there is between described data-carrier store and the described IC chip read and write data the tie line based on Zigbee, and this data-carrier store has a part for the PKI of encryption, described auxiliary circuit comprises temperature sensor, described in described data telecommunication line route, auxiliary circuit is enable, described data-carrier store has another part of corresponding PKI, described sensor starts storage work when external environment parameters is greater than or less than default a series of value, the data sensed are write by data telecommunication line road direction data-carrier store.
Further, described false proof rete is printed on security pattern or employing to be had anti-fraud functional aluminium film or fluorescence mantle or radium-shine soft film material and makes.
Further, described false proof rete has flexibility, in the packaging for foodstuff enabling this radio-frequency (RF) tag be applicable to have various appearance or packaging outside surface.
Further, described adhesive layer has hot melt adhesive or pressure sensitive adhesive to form.
Further, described false proof rete selects various cheque paper, anti false film or heat shrink films, and particularly, cheque paper selects fluorescent paper, safety line paper or water marked paper, and anti false film selects laser film or holographic film.
Further, described printed antenna uses microband printing slot antenna, gradient prints slot antenna or mutual encouragement waveguide feed printed-gap antenna, and the material of described various printed antenna uses hectographic printing, adagio printing or intaglio printing.
Further, the preferred electrically conductive ink printed antenna of described printed antenna.
Further, described external environment parameters preferably includes temperature, humidity, wind-force, acidity and pressure.
Further, described PKI, private key are pair of secret keys, are used for this active radio frequency label being formed an entirety.The cryptographic algorithm adopted between them adopts the big integer Factorization system RSA of comparative maturity in prior art, Elliptic Curve Discrete Logarithm system or Discrete log systems.
In use, this radio-frequency (RF) tag is preferably placed in the inner or outer surface at packaging for foodstuff top, or the top of food in packaging.When there being other article to be pressed on this food in whole logistics progress, pressure transducer detects the force value that this food bears.When being greater than or less than a certain preset value, this sensor starts the auxiliary circuit of described radio-frequency (RF) tag, writes the environmental parameter sensed to storer.
When reading the data of this radio-frequency (RF) tag, the reader corresponding to this radio-frequency (RF) tag comprises private key, the PKI of this private key and radio-frequency (RF) tag matches, thus realizing the safe storage of the data in radio frequency label, described reader is the RFID tag reader with this active radio frequency label with the corresponding interface.
Described storer adopts EEPROM, because the cost of present EEPROM is extremely low, so, for different commodity provide the EEPROM of different capabilities can not bring on cost infeasible, this had both been conducive to this radio-frequency (RF) tag and had had the ability enough meeting practical application, was also conducive to this radio-frequency (RF) tag large scale application.
The invention has the beneficial effects as follows: the anti-counterfeiting performance drastically increasing radio-frequency (RF) tag.
Accompanying drawing explanation
Fig. 1 shows the structured flowchart of active radio frequency label of the present invention.
Embodiment
As shown in Figure 1, active radio frequency label 1, comprise false proof rete 2 from bottom to up successively, auxiliary circuit layer 3, adhesive layer 4, IC layer 5 and sensing layer 6, wherein, false proof rete 2 encapsulates this radio-frequency (RF) tag 1 and has the printed antenna 7 be connected with IC layer 5, the bonding false proof rete 2 of adhesive layer 4 and IC layer 5, IC layer 5 comprises and carries out the untouchable IC chip 8 read and write data, auxiliary circuit layer 3 comprises data-carrier store 9 and auxiliary circuit 10, a part for this auxiliary circuit layer 3 is placed in inside false proof rete 2, sensor layer 6 comprises the sensor 11 detecting external environment parameters, there is between described storer 9 and the described IC chip 8 read and write data the tie line 12 based on Zigbee, and this memory device has a part for the PKI of encryption, described data-carrier store has another part of corresponding PKI.
When described sensor 11 is greater than or less than default a series of value { X in external environment parameters
1, X
2, X
3..., X
n, such as, for certain packaging bottled beer 13, when temperature value is greater than the threshold values of 10 DEG C of presetting in memory, this sensor 11 just writes the actual temperature data sensed to storer 9 by tie line 12.The power supply of this tie line 12 is enable by auxiliary circuit 10.In the present embodiment, auxiliary circuit 10 comprises temperature sensor, and when ambient temperature reaches predetermined temperature value, described tie line 10 is just enabled, and namely it is just powered.
In order to when reading these radio-frequency (RF) tag 1 data, data present to consumer in the form of a list intuitively, while write storer actual environment data, generate a timestamp.Like this, the data layout stored in memory is as follows:
| Sequence number | Timestamp | Actual environment parameter value (such as in this case temperature, unit be DEG C) |
| 1 | 2008-3-2016:05:08 | 15 |
Preferably, described false proof rete 2 can be printed on security pattern or employing has the making of anti-fraud functional material, such as aluminium film or fluorescence mantle or radium-shine mantle etc.
Described false proof rete 2 can have flexibility, in the packaging for foodstuff making this radio-frequency (RF) tag 1 can be applicable to have various appearance or packaging outside surface.
Described adhesive layer 4 has hot melt adhesive or pressure sensitive adhesive to form.
The described untouchable IC of reading and writing data chip 8 can adopt the RFID transceiver of MLX9010925KHz or the RFID transceiver of MLX9012113.56MHz.
Described false proof rete 2 can select various cheque paper, anti false film or heat shrink films, and particularly, cheque paper can select fluorescent paper, safety line paper or water marked paper, and anti false film can select laser film or holographic film.
Described printed antenna 7 can use microband printing slot antenna, gradient prints slot antenna or mutual encouragement waveguide feed printed-gap antenna, and the material of described various printed antenna can use hectographic printing, adagio printing or intaglio printing.
Described printed antenna 7 is electrically conductive ink printed antenna preferably.
Described external environment parameters preferably includes temperature, humidity, wind-force, acidity and pressure etc.
Described PKI, private key are pair of secret keys, are used for this active radio frequency label 1 to form an entirety.Concrete cryptographic algorithm can adopt the big integer Factorization system (the representational RSA of having) of comparative maturity in prior art, Elliptic Curve Discrete Logarithm system (ECC) or Discrete log systems (representational have DSA).
In use, this radio-frequency (RF) tag 1 is preferably placed in the inner or outer surface at packaging for foodstuff top, or the top of food in packaging.When there being other article to be pressed on this food in whole logistics progress, pressure transducer can detect the force value that this food bears.When being greater than or less than a certain preset value, this sensor starts the auxiliary circuit 10 of described radio-frequency (RF) tag 1, writes the environmental parameter sensed to storer.
When reading the data of this radio-frequency (RF) tag 1, the reader 20 corresponding to this radio-frequency (RF) tag 1 comprises private key, the PKI of this private key and radio-frequency (RF) tag 1 matches, thus realizing the safe storage of the data in radio frequency label 1, described reader is any commercially available RFID tag reader with this active radio frequency label with the corresponding interface.
When reading the data of this radio-frequency (RF) tag 31, the reader 50 corresponding to this radio-frequency (RF) tag 31 comprises private key, the PKI of this private key and radio-frequency (RF) tag 31 matches, thus realizing the safe storage of the data in radio frequency label 31, described reader is any commercially available RFID tag reader with this active radio frequency label with the corresponding interface.
Above-described, be only better possible embodiments of the present invention, non-ly therefore namely limit to the scope of the claims of the present invention, the equivalent structure change that every utilization instructions of the present invention and accompanying drawing content are done, all reason is with being contained in right of the present invention.
Claims (8)
1. an active radio frequency label, comprise false proof rete successively from bottom to up, auxiliary circuit layer, adhesive layer, IC layer and sensing layer, wherein, false proof rete encapsulates this radio-frequency (RF) tag and has the printed antenna be connected with IC layer, the bonding false proof rete of adhesive layer and IC layer, IC layer comprises and carries out the untouchable IC chip read and write data, auxiliary circuit layer comprises data-carrier store and auxiliary circuit, a part for this auxiliary circuit layer is placed in inside false proof rete, sensor layer comprises the sensor detecting external environment parameters, it is characterized in that, there is between described data-carrier store and the described IC chip read and write data the tie line based on Zigbee, and this data-carrier store has a part for the PKI of encryption, described auxiliary circuit comprises temperature sensor, described in described data telecommunication line route, auxiliary circuit is enable, described data-carrier store has another part of corresponding PKI, described sensor starts storage work when external environment parameters is greater than or less than default a series of value, the data sensed are write by data telecommunication line road direction data-carrier store.
2. active radio frequency label according to claim 1, is characterized in that, described false proof rete selects cheque paper, anti false film or heat shrink films.
3. active radio frequency label according to claim 2, is characterized in that, described cheque paper selects fluorescent paper, safety line paper or water marked paper.
4. active radio frequency label according to claim 2, is characterized in that, anti false film selects laser film or holographic film.
5. active radio frequency label according to claim 1, it is characterized in that, described printed antenna uses microband printing slot antenna, gradient prints slot antenna or mutual encouragement waveguide feed printed-gap antenna, and the material of described various printed antenna uses hectographic printing, adagio printing or intaglio printing.
6. active radio frequency label according to claim 1, is characterized in that, described printed antenna is electrically conductive ink printed antenna.
7. active radio frequency label according to claim 1, is characterized in that, described PKI, private key are pair of secret keys, is used for this active radio frequency label being formed an entirety.
8. active radio frequency label according to claim 7, is characterized in that, the cryptographic algorithm adopted between described PKI and private key adopts big integer Factorization system RSA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154758.5A CN104715277B (en) | 2015-04-02 | 2015-04-02 | The active radio frequency identification label of food state in a kind of monitoring Logistics Process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154758.5A CN104715277B (en) | 2015-04-02 | 2015-04-02 | The active radio frequency identification label of food state in a kind of monitoring Logistics Process |
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| Publication Number | Publication Date |
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| CN104715277A true CN104715277A (en) | 2015-06-17 |
| CN104715277B CN104715277B (en) | 2017-10-31 |
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| CN201510154758.5A Expired - Fee Related CN104715277B (en) | 2015-04-02 | 2015-04-02 | The active radio frequency identification label of food state in a kind of monitoring Logistics Process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111065871A (en) * | 2017-08-09 | 2020-04-24 | 武共株式会社 | Cold insulation box and cold insulation box management system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952951A (en) * | 2005-10-20 | 2007-04-25 | 中国科学院自动化研究所 | Foodstuffs security management system and method realized by RF identification technique |
| CN101251886A (en) * | 2007-11-02 | 2008-08-27 | 淄博泰宝防伪技术产品有限公司 | Method for related using conventional false proof physical distribution data label and electronic label |
| CN101390112A (en) * | 2006-02-27 | 2009-03-18 | Gti技术信息有限责任公司 | Electronic label, method for controlling products and method for data communication |
| WO2011141422A1 (en) * | 2010-05-11 | 2011-11-17 | Bundesdruckerei Gmbh | Security or value document, method for the production thereof and for the verification thereof |
-
2015
- 2015-04-02 CN CN201510154758.5A patent/CN104715277B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952951A (en) * | 2005-10-20 | 2007-04-25 | 中国科学院自动化研究所 | Foodstuffs security management system and method realized by RF identification technique |
| CN101390112A (en) * | 2006-02-27 | 2009-03-18 | Gti技术信息有限责任公司 | Electronic label, method for controlling products and method for data communication |
| CN101251886A (en) * | 2007-11-02 | 2008-08-27 | 淄博泰宝防伪技术产品有限公司 | Method for related using conventional false proof physical distribution data label and electronic label |
| WO2011141422A1 (en) * | 2010-05-11 | 2011-11-17 | Bundesdruckerei Gmbh | Security or value document, method for the production thereof and for the verification thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111065871A (en) * | 2017-08-09 | 2020-04-24 | 武共株式会社 | Cold insulation box and cold insulation box management system |
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| CN104715277B (en) | 2017-10-31 |
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Effective date of registration: 20170920 Address after: 535000, Qinzhou Industrial Zone, Qinbei District, the Guangxi Zhuang Autonomous Region, three Applicant after: Qinzhou nine-alliance foodstuffs Co.,Ltd. Address before: 610041, No. 7, No. 52, Yongfeng Road, Chengdu hi tech Zone, Sichuan, 703 Applicant before: CHENGDU DATA CLOUD TECHNOLOGY CO.,LTD. |
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