Dual-frequency one-time conversion anti-counterfeiting label and method based on liquid metal circuit

Abstract

The present invention discloses a dual-frequency one-time conversion anti-counterfeiting label and method based on a liquid metal circuit, comprising a first antenna layer, a flexible material isolation layer, and a second antenna layer arranged from top to bottom, an air through hole is arranged in the middle of the flexible material isolation layer, a protrusion is arranged at the bottom of the first antenna layer, and a receiving groove adapted to the protrusion is arranged on the upper surface of the second antenna layer, and the protrusion passes through the air through hole and is inserted into the receiving groove, and a non-joule magnetostrictive magnetic sheet is arranged at each end of the air through hole, and an RFID ultra-high frequency antenna made of liquid metal is arranged between the non-joule magnetostrictive magnetic sheet and the protrusion, and a circuit groove is arranged at the bottom of the receiving groove, and the shape of the circuit groove is adapted to the shape of the NFC high-frequency antenna, and the RFID ultra-high frequency antenna is connected to the dual-frequency module. The label of the present invention adopts liquid metal to make the antenna, and has a one-time conversion function of the dual-band antenna driven by a non-joule magnetostrictive magnet, so as to realize the multifunctional application of the label in different product periods.

Description

Technical Field

[0001] The present invention relates to the field of logistics technology, and in particular to a dual-frequency one-time conversion anti-counterfeiting label based on a liquid metal circuit and a method thereof. Background Art

[0002] Since the rapid development of the commodity economy, counterfeit and inferior goods have been prevalent in the market, seriously endangering the vital interests of enterprises and consumers and affecting the national economic order. In recent years, electronic tags based on RFID and NFC technology have gradually become the mainstream anti-counterfeiting label market.

[0003] RFID radio frequency identification technology uses wireless radio frequency to conduct non-contact two-way data communication, with good recognition performance at medium and long distances. It is often used in scenarios such as intelligent warehousing management of large-scale goods and intelligent sales of goods.

[0004] NFC (near-field communication) technology integrates RFID and interconnect technologies to enable short-range, contactless, high-frequency data exchange. The increasing popularity of mobile phones equipped with NFC technology has greatly enriched the data exchange modes between users and the outside world, providing a more convenient means of interaction.

[0005] When placed in a magnetic field, non-Joule magnetostrictive magnets undergo significant changes in length and volume. Conventional magnetostrictive materials, limited by Joule magnetostriction, can only be used to apply force in a single direction. However, non-Joule magnetostrictive magnets can expand in all directions simultaneously, allowing them to be used as omnidirectional brakes.

[0006] Liquid metal is an amorphous, flowable metal that is liquid at room temperature. It has excellent electrical conductivity but is also fragile, making it difficult to copy and transfer. Circuits made with liquid metal are more flexible and adaptable than traditional circuits, and can be freely switched between different circuits through appropriate physical drivers and constraints.

[0007] A drawback of existing technology is that the conductors in existing anti-counterfeiting tags are mostly made of copper foil, which is difficult to damage and can be easily transferred and reused maliciously, significantly compromising their anti-counterfeiting effectiveness. Traditional liquid metal tags also operate in a single frequency band, making it impossible to integrate NFC and RFID functions, resulting in a lack of practical performance. Summary of the Invention

[0008] In view of at least one defect of the prior art, the purpose of the present invention is to provide a dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuits. The anti-counterfeiting label uses liquid metal circuits to make antenna circuits. Due to the fragility of the liquid metal antenna circuits, the label is prevented from being maliciously transferred for secondary use. It also has a dual-band antenna one-time conversion function driven by a non-Joule magnetostrictive magnet, realizing the multifunctional use of the label in different stages of the product, greatly improving the practical performance and anti-counterfeiting performance of the electronic label.

[0009] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a dual-frequency disposable conversion anti-counterfeiting label based on a liquid metal circuit, comprising a first antenna layer, a flexible material isolation layer and a second antenna layer arranged from top to bottom, the substrates of the first antenna layer and the second antenna layer are both flexible materials, a strip-shaped air hole is provided in the middle of the flexible material isolation layer, a protrusion is provided at the bottom of the first antenna layer, and an accommodating groove adapted to the protrusion is provided on the upper surface of the second antenna layer. The protrusion passes through the center of the air hole and is inserted into the accommodating groove and abuts against the bottom of the accommodating groove. The width of the protrusion is adapted to the width of the air hole. A non-Joule magnetostrictive magnetic sheet is provided at each end of the air hole. An RFID ultra-high frequency antenna circuit is provided in the air hole portion between the non-Joule magnetostrictive magnetic sheet and the protrusion. The RFID ultra-high frequency antenna circuit is made of liquid metal and adhered to At the bottom of the first antenna layer, a circuit groove is provided at the bottom of the accommodating groove. The shape of the circuit groove is adapted to the shape of the NFC high-frequency antenna circuit. The RFID ultra-high frequency antenna circuit is connected to the dual-band module. When the non-Joule magnetostrictive magnetic sheet is subjected to an external magnetic field, its volume expands, increasing the distance between the first and second antenna layers facing the air hole, causing the protrusion to be pulled out of the accommodating groove. The non-Joule magnetostrictive magnetic sheet also expands in the direction of the protrusion, destroying the RFID ultra-high frequency antenna circuit and pushing the liquid metal forming the RFID ultra-high frequency antenna circuit into the accommodating groove. When the external magnetic field is removed, the volume of the non-Joule magnetostrictive magnetic sheet recovers, and the protrusion is reinserted into the accommodating groove and abuts against the bottom of the accommodating groove, squeezing the liquid metal into the circuit groove, forming the NFC high-frequency antenna circuit. The NFC high-frequency antenna circuit is then connected to the dual-band module.

[0010] The dual-frequency module includes an RFID ultra-high frequency chip and an NFC high-frequency chip. The RFID ultra-high frequency chip is fixedly arranged on the upper surface of the first antenna layer, and the RFID ultra-high frequency chip is connected to the RFID ultra-high frequency antenna circuit via a wire passing through the first antenna layer. The NFC high-frequency chip is fixedly arranged on the lower surface of the second antenna layer, and the NFC high-frequency chip is connected to the NFC high-frequency antenna circuit via a wire passing through the second antenna layer.

[0011] The dual-frequency module is a dual-frequency chip, which is fixedly arranged on the upper surface of the first antenna layer. The dual-frequency chip is connected to the RFID ultra-high frequency antenna circuit and the NFC high frequency antenna circuit via a raised wire passing through the first antenna layer.

[0012] When the external magnetic field is removed, the protrusion is inserted into the accommodating groove again and abuts against the bottom of the accommodating groove. The protrusion and the bottom of the accommodating groove fit together seamlessly, and the wire set in the protrusion contacts and connects to the NFC high-frequency antenna circuit.

[0013] The bottom of the first antenna layer facing the RFID ultrahigh frequency antenna circuit is coated with a sub-liquidophilic metal coating, the circuit groove is coated with a strongly liquidophilic metal coating, and the non-Joule magnetostrictive magnetic sheet, the air hole, and the upper surface of the second antenna layer except the circuit groove are coated with a liquid-repellent metal coating.

[0014] A first flexible material layer is arranged on the first antenna layer; a second flexible material layer and a release paper layer are arranged in sequence below the second antenna layer, and an adhesive is arranged on the lower surface of the second flexible material layer.

[0015] The first flexible material layer, the first antenna layer, the flexible material isolation layer, the second antenna layer, the second flexible material layer, and the release paper layer are stacked together in sequence from top to bottom.

[0016] Parts of the first flexible material layer, the first antenna layer, the flexible material isolation layer, the second antenna layer, and the second flexible material layer that are in physical contact are all sealed and connected.

[0017] The flexible material isolation layer is also made of flexible material, and its thickness is smaller than that of the remaining flexible material layers.

[0018] During the product production, warehousing and logistics, and retail management stages, the dual-frequency module is connected to the RFID UHF antenna circuit, and the dual-frequency one-time conversion anti-counterfeiting tag is in UHF RFID tag mode, supporting medium and long-distance large-scale identification. In this state, the dual-frequency one-time conversion anti-counterfeiting tag will be destroyed by malicious secondary transfer and lose its identification function;

[0019] When external force is used to tear off the dual-frequency one-time conversion anti-counterfeiting label from the product, the flexible material and the RFID UHF antenna circuit are easily damaged, and the dual-frequency one-time conversion anti-counterfeiting label is destroyed and becomes invalid;

[0020] When the retailer sells the product to the customer, it undergoes a one-time irreversible conversion in a strong magnetic environment. The dual-frequency module is connected to the NFC high-frequency antenna circuit. The dual-frequency one-time conversion anti-counterfeiting tag is in high-frequency NFC tag mode during the customer's use phase, supporting close-range interaction with private mobile devices.

[0021] The anti-counterfeiting method of the dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit comprises the following steps:

[0022] Step 1: The product manufacturer produces the product; the label manufacturer produces the dual-frequency one-time conversion anti-counterfeiting label; the dual-frequency one-time conversion anti-counterfeiting label is transported to the product manufacturer for product packaging;

[0023] Step 2: The product manufacturer writes product information on the dual-frequency one-time conversion anti-counterfeiting label on the product;

[0024] Step 3: The manufacturer stores the product;

[0025] Step 4: Are products shipped from the storage warehouse to retail? If no, go to step 5; if yes, go to step 7.

[0026] Step 5: During the warehousing process, the dual-frequency one-time conversion anti-counterfeiting labels on the products are identified at medium and long distances and on a large scale;

[0027] Step 6: Centrally manage products during warehousing; return to step 4;

[0028] Step 7: Product logistics transportation to retail outlets for sale;

[0029] Step 8: Has the dual-frequency one-time conversion anti-counterfeiting label on the product package been maliciously transferred a second time? If yes, go to step 9; if not, go to step 10;

[0030] Step 9: The dual-frequency one-time conversion anti-counterfeiting label is damaged and invalid; the product is a counterfeit, and the process ends.

[0031] Step 10: The retail outlet conducts large-scale identification of the dual-frequency one-time conversion anti-counterfeiting labels on the products at medium and long distances;

[0032] Step 11: Centralize product management during the retail process;

[0033] Step 12: Is the product sold? If yes, go to step 13, if no, go to step 8;

[0034] Step 13: In a strong magnetic environment, perform a one-time irreversible conversion on the dual-frequency one-time conversion anti-counterfeiting label packaged with the product, and convert the label to high-frequency NFC tag mode;

[0035] Step 14: Products are sold to customers;

[0036] Step 15: The customer uses a private mobile device to conduct close-range information interaction with the dual-frequency one-time conversion anti-counterfeiting label on the product; the customer obtains product authenticity information.

[0037] Significant effect: The present invention provides a dual-frequency one-time conversion anti-counterfeiting label and method based on liquid metal circuits. The anti-counterfeiting label uses liquid metal circuits to make antenna circuits. Due to the fragility of the liquid metal antenna circuit, the label is prevented from being maliciously transferred for secondary use. It also has a one-time conversion function of a dual-band antenna driven by a non-Joule magnetostrictive magnet, which realizes the multifunctional use of the label in different stages of the product, greatly improving the practical performance and anti-counterfeiting performance of the electronic label. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is an exploded structural diagram of the dual-core dual-frequency structure of the dual-frequency one-time conversion anti-counterfeiting label;

[0039] Figure 2 This is an exploded structural diagram of a dual-frequency one-time conversion anti-counterfeiting label with a single core and dual-frequency structure;

[0040] Figure 3 a is the cross-sectional view of the microelement of the RFID UHF antenna circuit;

[0041] Figure 3 b is a schematic diagram of the connection of the first antenna layer chip;

[0042] Figure 3 c is the cross-sectional view of the NFC high-frequency antenna circuit microelement;

[0043] Figure 3 d is the second antenna layer chip connection diagram;

[0044] Figure 4 A schematic diagram of the connection between the dual-frequency chip (14) and the RFID ultra-high frequency antenna circuit and the NFC high frequency antenna circuit;

[0045] Figure 5 This is a schematic diagram of a normal cross section from the first antenna layer to the second antenna layer;

[0046] Figure 6 Schematic diagram of the cross section of the transition state from the first antenna layer to the second antenna layer;

[0047] Figure 7 This is a schematic diagram of the final cross-section from the first antenna layer to the second antenna layer;

[0048] Figure 8 Schematic diagram of the anti-counterfeiting system for dual-frequency one-time conversion anti-counterfeiting labels;

[0049] Figure 9 This is a flow chart of the anti-counterfeiting function of a dual-frequency one-time conversion anti-counterfeiting label. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] like Figures 1-9 As shown, a dual-frequency disposable conversion anti-counterfeiting label based on liquid metal circuit includes a first antenna layer 1, a flexible material isolation layer 2 and a second antenna layer 3 arranged from top to bottom. The substrates of the first antenna layer 1 and the second antenna layer 3 are both flexible materials. A strip-shaped air hole 21 is provided in the middle of the flexible material isolation layer 2, a protrusion 11 is provided at the bottom of the first antenna layer 1, and an accommodating groove 31 adapted to the protrusion 11 is provided on the upper surface of the second antenna layer 3. The protrusion 11 passes through the center of the air hole 21 and is inserted into the accommodating groove 31 and abuts against the bottom of the accommodating groove 31. The width of the protrusion 11 is adapted to the width of the air hole 21. A non-Joule magnetostrictive magnetic sheet 4 is provided at each end of the air hole 21. An RFID ultra-high frequency antenna circuit 12 is provided in the air hole 21 between the non-Joule magnetostrictive magnetic sheet 4 and the protrusion 11. The RFID ultra-high frequency antenna circuit 12 is made of liquid metal and adhered to the bottom of the first antenna layer 1. A circuit groove 311 is provided at the bottom of the nano-recess 31. The shape of the circuit groove 311 is adapted to the shape of the NFC high-frequency antenna circuit 32. The RFID UHF antenna circuit 12 is connected to the dual-band module. When the non-Joule magnetostrictive magnetic sheet 4 is subjected to an external magnetic field, its volume expands, increasing the distance between the first antenna layer 1 and the second antenna layer 3 in the portion of the air hole 21, causing the protrusion 11 to be pulled out of the receiving groove 31. The non-Joule magnetostrictive magnetic sheet 4 also expands toward the protrusion 11, destroying the RFID UHF antenna circuit 12 and pushing the liquid metal forming the RFID UHF antenna circuit 12 into the receiving groove 31. When the external magnetic field is removed, the volume of the non-Joule magnetostrictive magnetic sheet 4 recovers, and the protrusion 11 is reinserted into the receiving groove 31 and abuts against the bottom of the receiving groove 31, squeezing the liquid metal into the circuit groove 311, forming the NFC high-frequency antenna circuit 32. The NFC high-frequency antenna circuit 32 is then connected to the dual-band module.

[0052] like Figure 1 As shown, the air hole 21 is roughly strip-shaped, and the middle and both ends can be appropriately deformed according to the shape of the protrusion 11 and the non-Joule magnetostrictive magnetic sheet 4. The protrusion 11 is cylindrical, and its width is adapted to the width of the air hole 21, and the non-Joule magnetostrictive magnetic sheet 4 is adapted to the width of the two ends of the air hole 21.

[0053] The disposable transfer anti-counterfeiting label uses liquid metal as its antenna circuit. Due to the fragility of the liquid metal antenna circuit, it can prevent the label from being maliciously transferred and reused. However, due to its thinness, the flexible material is also easily damaged when torn forcefully.

[0054] The RFID UHF antenna circuit 12 is an open RFID UHF antenna circuit, and the NFC high frequency antenna circuit 32 is an embedded NFC high frequency antenna circuit.

[0055] like Figure 1 As shown, the dual-band module includes an RFID UHF chip 13 and an NFC high-frequency chip 33. The RFID UHF chip 13 is disposed on the upper surface of the first antenna layer 1 and is connected to the RFID UHF antenna circuit 12 via a wire passing through the first antenna layer 1. The NFC high-frequency chip 33 is disposed on the lower surface of the second antenna layer 3 and is connected to the NFC high-frequency antenna circuit 32 via a wire passing through the second antenna layer 3. The NFC high-frequency chip 33 is an embedded NFC high-frequency chip.

[0056] like Figure 2 As shown, the dual-frequency module is a dual-frequency chip 14, which is arranged on the upper surface of the first antenna layer 1. The dual-frequency chip 14 is connected to the RFID ultra-high frequency antenna circuit 12 and the NFC high frequency antenna circuit 32 via a wire passing through the protrusion 11 of the first antenna layer 1.

[0057] When the external magnetic field is removed, the protrusion 11 is inserted into the accommodating groove 31 again and abuts against the bottom of the accommodating groove 31. The protrusion 11 fits seamlessly with the bottom of the accommodating groove 31, and the wire arranged in the protrusion 11 contacts and connects to the NFC high-frequency antenna circuit 32.

[0058] like Figure 1-Figure 2 As shown, the dual-frequency one-time conversion label is designed with a dual-core dual-frequency conversion structure and a single-core dual-frequency conversion structure, which realizes one-time conversion of the dual-frequency one-time conversion label and enriches the use function of the anti-counterfeiting label.

[0059] The difference between a dual-core dual-frequency conversion structure and a single-core dual-frequency conversion structure lies in the choice of tag chip and the connection method of the antenna circuit. The dual-core dual-frequency conversion structure requires that the RFID UHF chip 13 be compatible with the UHF 860-960MHz RFID tag chip, and the NFC high-frequency chip 33 be compatible with the high-frequency 13.56MHz NFC tag chip. The single-core dual-frequency conversion structure requires that the dual-frequency chip 14 be compatible with both the UHF 860-960MHz and high-frequency 13.56MHz RFID tags.

[0060] Figure 3 b. Figure 3 d shows schematic diagrams of the connection between the dual-core dual-frequency conversion structure RFID UHF chip 13 and the NFC high-frequency chip 33 and the RFID UHF antenna circuit 12 and the NFC high-frequency antenna circuit 32 respectively.

[0061] Figure 4 The figure shows a schematic diagram of connecting the dual-frequency chip 14 with the RFID UHF antenna circuit 12 and the NFC high-frequency antenna circuit 32 respectively through the wires provided in the protrusion 11 in the one-core dual-frequency conversion structure.

[0062] The bottom of the first antenna layer 1 facing the RFID UHF antenna circuit 12 is coated with a sub-liquidophilic metal coating, the circuit groove 311 is coated with a strongly liquidophilic metal coating, and the non-Joule magnetostrictive magnetic sheet 4, the air hole 21, and the upper surface of the second antenna layer 3 except for the circuit groove 311 are coated with a liquid-repellent metal coating.

[0063] Strongly hydrophilic metal coatings have a strong adsorption force on liquid metal. Lyophobic metal coatings have almost no adsorption force on liquid metal. Sub-lyophilic metal coatings have a weaker adsorption force on liquid metal than strong hydrophilic metal coatings and are easily damaged.

[0064] Figure 3 a. Figure 3 As shown in Figure c, the RFID UHF antenna circuit 12 is made of liquid metal and printed on the lower surface of the first antenna layer 1 with a sub-liquid-philic metal coating. This results in low stability and makes the RFID UHF antenna circuit 12 susceptible to deformation and damage under external forces. The NFC high-frequency antenna circuit 32 is also made of liquid metal and coated with a strong liquid-philic metal coating within a circuit groove 311 at the bottom of the central receiving groove 31 of the second antenna layer 6. Under normal conditions, the circuit groove 311 is protected by an external flexible material, making the NFC high-frequency antenna circuit 32 relatively stable and less susceptible to damage from external forces.

[0065] The RFID UHF antenna circuit 12 is printed on the lower surface of the first antenna layer 1 by a liquid metal circuit printer and is connected to the RFID UHF chip 13 .

[0066] like Figure 5 As shown, the dual-frequency, one-time conversion tag is in its initial state. Two non-Joule magnetostrictive magnetic sheets 4 are embedded in the first antenna layer 1, the flexible material isolation layer 2, and the middle of the second antenna layer 4, respectively. The flexible material of the tag's outer contour is tightly connected and indestructible. Only the liquid metal on the RFID UHF antenna circuit 12 serves as the antenna circuit carrier. The circuit groove 311 is empty, with only the circuit structure and no actual carrier. The protrusion 11 fits tightly above the circuit groove 311. The tag is now connected to the RFID UHF antenna circuit 12, enabling medium- and long-range information recognition.

[0067] like Figure 6As shown, a strong magnetic field is applied to the tag to initiate a transition, placing the tag in a transition state. The non-Joule magnetostrictive magnetic sheet 4 rapidly expands under the influence of the strong external magnetic field. Due to the binding effect of the tag structure and the deformation properties of the flexible material, the first antenna layer 1, the flexible material isolation layer 2, and the second antenna layer 3 are subjected to the expansion force of the non-Joule magnetostrictive magnetic sheet 4, causing the air holes 21 in the flexible material isolation layer 2 to increase in height, thereby ending the contact between the protrusion 11 and the circuit groove 311. The non-Joule magnetostrictive magnetic sheet 4, the air holes 21, and the upper surfaces of the second antenna layer 3 are coated with a liquid-repellent metal coating. Due to the weak binding force of the air holes 21, the non-Joule magnetostrictive magnetic sheet 4 expands primarily toward the protrusion 11, thereby coming into contact with the RFID UHF antenna circuit 12, pushing the unstable liquid metal substrate to continue expanding until it contacts the protrusion 11 and stops. At this point, all the liquid metal on the RFID UHF antenna circuit 12 is pushed into the receiving groove 31 on the upper surface of the second antenna layer 3. In this state, the UHF antenna is completely inoperative due to the lack of an antenna circuit structure, and the NFC high-frequency antenna circuit 32 has not yet been formed.

[0068] like Figure 7 As shown, the tag is now in the final state after the conversion. After the conversion is complete, the external strong magnetic field is removed, the non-Joule magnetostrictive magnetic sheet 4 will re-contract, and the flexible material will return to its initial structure. The protrusion 11 and the bottom of the receiving groove 31 will re-enter the bonding state. The protrusion 11 will compact the liquid metal material scattered in the receiving groove 31 on the upper surface of the second antenna layer 6 into the engraved circuit groove 311. At this point, the high-frequency antenna is effective, and the tag will behave as an NFC tag with near-field communication identification capabilities. The RFID ultra-high frequency antenna circuit 12 is damaged, without a substantial circuit carrier, and is inoperative.

[0069] The above process is irreversible. Once the UHF tag is converted to a HF tag, it cannot be restored. At the same time, considering the structural characteristics of the RFID UHF antenna circuit 12 and the NFC HF antenna circuit 32, the dual-frequency one-time conversion anti-counterfeiting tag has the following characteristics:

[0070] 1. When the tag is in the ultra-high frequency state, it can achieve medium and long-distance identification. The tag circuit is easily damaged, and after a second malicious transfer, it will directly fail due to strong external interference.

[0071] 2. When the tag is in high frequency state, it can realize short-range communication identification, the tag circuit is not easily damaged, and the tag has good structural strength and life.

[0072] A first flexible material layer 5 is provided on the first antenna layer 1 ; a second flexible material layer 6 and a release paper layer are sequentially provided under the second antenna layer 3 , and an adhesive is provided on the lower surface of the second flexible material layer 6 .

[0073] The first flexible material layer 5 , the first antenna layer 1 , the flexible material isolation layer 2 , the second antenna layer 3 , the second flexible material layer 6 , and the release paper layer are stacked together in sequence from top to bottom and glued together on all sides.

[0074] The release paper layer is not shown in the picture. When sticking the label on the product, the release paper layer needs to be torn off.

[0075] Product information and the like may be provided on the first flexible material layer 5 .

[0076] Parts of the first flexible material layer 5 , the first antenna layer 1 , the flexible material isolation layer 2 , the second antenna layer 3 , and the second flexible material layer 6 that are in physical contact are all sealed and connected.

[0077] The flexible material isolation layer 2 is also made of flexible material, and its thickness is smaller than that of the other flexible material layers.

[0078] like Figure 8 As shown, in the product production stage, warehousing and logistics stage, and retail management stage, the dual-frequency module is connected to the RFID UHF antenna circuit 12, and the dual-frequency one-time conversion anti-counterfeiting label is in the UHF RFID tag mode, supporting medium and long-distance large-scale identification. In this state, the dual-frequency one-time conversion anti-counterfeiting label will be destroyed by malicious secondary transfer and lose its identification function;

[0079] When an external force is used to tear off the dual-frequency one-time conversion anti-counterfeiting label from the product, the dual-frequency one-time conversion anti-counterfeiting label is damaged and becomes invalid due to the fragile performance of the flexible material and the RFID UHF antenna circuit 12;

[0080] When the retailer sells the anti-counterfeiting tag to the customer, a one-time irreversible conversion is performed in a strong magnetic environment. The dual-frequency module is connected to the NFC high-frequency antenna circuit 32. The dual-frequency one-time conversion anti-counterfeiting tag is in the high-frequency NFC tag mode during the customer's use phase, supporting close-range interaction with private mobile devices.

[0081] The anti-counterfeiting method of the dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit comprises the following steps:

[0082] Step 1: The product manufacturer produces the product; the label manufacturer produces the dual-frequency one-time conversion anti-counterfeiting label; the dual-frequency one-time conversion anti-counterfeiting label is transported to the product manufacturer for product packaging;

[0083] Step 2: The product manufacturer writes product information on the dual-frequency one-time conversion anti-counterfeiting label on the product;

[0084] Step 3: The manufacturer stores the product;

[0085] Step 4: Are products shipped from the storage warehouse to retail? If no, go to step 5; if yes, go to step 7.

[0086] Step 5: During the warehousing process, the dual-frequency one-time conversion anti-counterfeiting labels on the products are identified at medium and long distances and on a large scale;

[0087] Step 6: Centrally manage products during warehousing; return to step 4;

[0088] Step 7: Product logistics transportation to retail outlets for sale;

[0089] Step 8: Has the dual-frequency one-time conversion anti-counterfeiting label on the product package been maliciously transferred a second time? If yes, go to step 9; if not, go to step 10;

[0090] Step 9: The dual-frequency one-time conversion anti-counterfeiting label is damaged and invalid; the product is a counterfeit, and the process ends.

[0091] Step 10: The retail outlet conducts large-scale identification of the dual-frequency one-time conversion anti-counterfeiting labels on the products at medium and long distances;

[0092] Step 11: Centralize product management during the retail process;

[0093] Step 12: Is the product sold? If yes, go to step 13, if no, go to step 8;

[0094] Step 13: In a strong magnetic environment, perform a one-time irreversible conversion on the dual-frequency one-time conversion anti-counterfeiting label packaged with the product, and convert the label to high-frequency NFC tag mode;

[0095] Step 14: Products are sold to customers;

[0096] Step 15: The customer uses a personal mobile device to conduct close-range information interaction with the dual-frequency one-time conversion anti-counterfeiting label on the product; the customer obtains product authenticity information and the latest manufacturer news.

[0097] Because electronic tags permanently store product information and credentials provided by the merchant, they act like an official certificate for high-value-added goods, enhancing the product's collectible value. When users scan the tag to obtain authenticity verification information, their satisfaction with the product increases due to its high collectible value.

[0098] The anti-counterfeiting method for the dual-frequency one-time conversion anti-counterfeiting label based on the liquid metal circuit includes the following steps: when the non-Joule magnetostrictive magnetic sheet 4 is subjected to an external magnetic field, its volume expands, increasing the distance between the first antenna layer 1 and the second antenna layer 3 facing the air hole 21, causing the protrusion 11 to be pulled out of the accommodating groove 31. The non-Joule magnetostrictive magnetic sheet 4 also expands toward the protrusion 11, destroying the RFID ultra-high frequency antenna circuit 12, and pushing the liquid metal forming the RFID ultra-high frequency antenna circuit 12 into the accommodating groove 31. When the external magnetic field is removed, the volume of the non-Joule magnetostrictive magnetic sheet 4 recovers, the protrusion 11 is reinserted into the accommodating groove 31 and abuts against the bottom of the accommodating groove 31, squeezing the liquid metal into the circuit groove 311, forming the NFC high-frequency antenna circuit 32. The NFC high-frequency antenna circuit 32 is connected to the dual-frequency module.

[0099] Finally, it should be noted that the above examples are only specific implementation examples of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit, characterized in that: The invention comprises a first antenna layer (1), a flexible material isolation layer (2) and a second antenna layer (3) arranged from top to bottom, wherein the substrates of the first antenna layer (1) and the second antenna layer (3) are both made of flexible materials, a strip-shaped air hole (21) is arranged in the middle of the flexible material isolation layer (2), a protrusion (11) is arranged at the bottom of the first antenna layer (1), and a receiving groove (31) adapted to the protrusion (11) is arranged on the upper surface of the second antenna layer (3), the protrusion (11) passes through the center of the air hole (21) and is inserted into the receiving groove (31) and is aligned with the bottom of the receiving groove (31). A non-Joule magnetostrictive magnetic sheet (4) is disposed at each end of the air hole (21); the air hole (21) is strip-shaped, and the middle and both ends are deformed according to the shapes of the protrusion (11) and the non-Joule magnetostrictive magnetic sheet (4); the protrusion (11) is cylindrical, and its width is adapted to the width of the air hole (21); the non-Joule magnetostrictive magnetic sheet (4) is adapted to the width of both ends of the air hole (21); an RFID ultra-high frequency antenna circuit (12) is disposed between the non-Joule magnetostrictive magnetic sheet (4) and the protrusion (11); the RFID ultra-high frequency antenna circuit (12) The invention is made of liquid metal and adhered to the bottom of the first antenna layer (1). A circuit groove (311) is provided at the bottom of the accommodating groove (31). The shape of the circuit groove (311) is adapted to the shape of the NFC high-frequency antenna circuit (32). The RFID ultra-high frequency antenna circuit (12) is connected to the dual-frequency module. When the non-joule magnetostrictive magnetic sheet (4) is subjected to an external magnetic field, its volume expands, thereby increasing the distance between the first antenna layer (1) and the second antenna layer (3) facing the air through hole (21), so that the protrusion (11) is pulled out of the accommodating groove (31). The non-Joule magnetostrictive magnetic sheet (4) also expands in the direction of the protrusion (11), destroying the RFID ultra-high frequency antenna circuit (12), and pushing the liquid metal made of the RFID ultra-high frequency antenna circuit (12) into the accommodating groove (31); when the external magnetic field is removed, the volume of the non-Joule magnetostrictive magnetic sheet (4) is restored, the protrusion (11) is inserted into the accommodating groove (31) again and abuts against the bottom of the accommodating groove (31), and the liquid metal is squeezed into the circuit groove (311) to form an NFC high-frequency antenna circuit (32); the NFC high-frequency antenna circuit (32) is connected to the dual-frequency module.

2. The dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 1 is characterized in that: The dual-frequency module comprises an RFID ultra-high frequency chip (13) and an NFC high frequency chip (33); the RFID ultra-high frequency chip (13) is arranged on the upper surface of the first antenna layer (1); the RFID ultra-high frequency chip is connected to the RFID ultra-high frequency antenna circuit (12) via a wire passing through the first antenna layer (1); and the NFC high frequency chip (33) is arranged on the lower surface of the second antenna layer (3); the NFC high frequency chip (33) is connected to the NFC high frequency antenna circuit (32) via a wire passing through the second antenna layer (3).

3. The dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 1 is characterized in that: The dual-frequency module is a dual-frequency chip (14), which is arranged on the upper surface of the first antenna layer (1), and the dual-frequency chip (14) is connected to the RFID ultra-high frequency antenna circuit (12) and the NFC high frequency antenna circuit (32) via a wire passing through a protrusion (11) of the first antenna layer (1).

4. The dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 1 is characterized in that: The bottom of the first antenna layer (1) facing the RFID ultra-high frequency antenna circuit (12) is coated with a sub-liquidophilic metal coating, the circuit groove (311) is coated with a strongly liquidophilic metal coating, and the non-Joule magnetostrictive magnetic sheet (4), the air through hole (21), and the upper surface of the second antenna layer (3) except for the circuit groove (311) are coated with a liquid-repellent metal coating.

5. The dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 1 is characterized in that: A first flexible material layer (5) is arranged on the first antenna layer (1); a second flexible material layer (6) and a release paper layer are arranged in sequence below the second antenna layer (3); and an adhesive is arranged on the lower surface of the second flexible material layer (6).

6. The dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 1 is characterized by: In the product production stage, the warehousing and logistics stage, and the retail management stage, the dual-frequency module is connected to the RFID ultra-high frequency antenna circuit (12), and the dual-frequency one-time conversion anti-counterfeiting label is in the ultra-high frequency RFID label mode, supporting medium- and long-distance large-scale identification. In this state, the dual-frequency one-time conversion anti-counterfeiting label will be destroyed by malicious secondary transfer and lose its identification function; When the retailer sells the product to the customer, a one-time irreversible conversion is performed in a strong magnetic environment. The dual-frequency module is connected to the NFC high-frequency antenna circuit (32). The dual-frequency one-time conversion anti-counterfeiting label is in a high-frequency NFC label mode during the customer use phase, supporting close-range interaction with private mobile devices.

7. The anti-counterfeiting method of the dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 1 is characterized in that: The steps include: Step 1: The product manufacturer produces the product; the label manufacturer produces the dual-frequency one-time conversion anti-counterfeiting label; the dual-frequency one-time conversion anti-counterfeiting label is transported to the product manufacturer for product packaging; Step 2: The product manufacturer writes product information to the dual-frequency one-time conversion anti-counterfeiting label on the product; Step 3: The commodity manufacturer stores the product; Step 4: Whether to transport products from the storage warehouse to retail, if no, go to step 5, if yes, go to step 7; Step 5: During the warehousing process, the dual-frequency one-time conversion anti-counterfeiting labels on the products are identified on a large scale over medium and long distances; Step 6: Centrally manage products during warehousing; return to step 4; Step 7: Product logistics transportation to retail outlets for sale; Step 8: Check whether the dual-frequency one-time conversion anti-counterfeiting label on the product package has been maliciously transferred for the second time. If yes, go to step 9; if not, go to step 10; Step 9: The dual-frequency one-time conversion anti-counterfeiting label is damaged and invalid; the product is a counterfeit, and the process ends; Step 10: The retail outlet conducts large-scale identification of the dual-frequency one-time conversion anti-counterfeiting labels on the products at medium and long distances; Step 11: Centrally manage products during the retail process; Step 12: Is the product sold? If yes, go to step 13; if no, go to step 8; Step 13: Perform a one-time irreversible conversion on the dual-frequency one-time conversion anti-counterfeiting label packaged in the product under a strong magnetic environment, and convert the label into a high-frequency NFC label mode; Step 14: Products are sold to customers; Step 15: The customer uses a private mobile device to perform close-range information interaction with the dual-frequency one-time conversion anti-counterfeiting label on the product; the customer obtains product authenticity information.

8. The anti-counterfeiting method of the dual-frequency one-time conversion anti-counterfeiting label based on liquid metal circuit according to claim 7, characterized in that: Step 13 comprises the following contents: when the non-Joule magnetostrictive magnetic sheet (4) is subjected to an external magnetic field, its volume expands, so that the distance between the first antenna layer (1) and the second antenna layer (3) facing the air through hole (21) increases, so that the protrusion (11) is pulled out of the receiving groove (31), and the non-Joule magnetostrictive magnetic sheet (4) also expands in the direction of the protrusion (11), destroying the RFID ultra-high frequency antenna circuit (12), and pushing the liquid metal made of the RFID ultra-high frequency antenna circuit (12) into the receiving groove (31); when the external magnetic field is removed, the volume of the non-Joule magnetostrictive magnetic sheet (4) is restored, the protrusion (11) is inserted into the receiving groove (31) again and abuts against the bottom of the receiving groove (31), and the liquid metal is squeezed into the circuit groove (311), so as to form an NFC high frequency antenna circuit (32); the NFC high frequency antenna circuit (32) is connected to the dual-frequency module.

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