A temperature-sensitive electronic tag

Abstract

The present invention provides a temperature-sensitive electronic tag, which relates to the technical field of electronic tags. The temperature-sensitive electronic tag provided by the present invention includes: a substrate; an aluminum-based antenna located on the substrate; a chip attached to the substrate and connected to the aluminum-based antenna; a liquid metal temperature-sensing part that overlaps at least part of the aluminum-based antenna, and the liquid metal temperature-sensing part is used to cause a chemical reaction of the aluminum-based antenna when the ambient temperature is equal to or higher than a preset temperature, so as to change the structure and / or resistance of the aluminum-based antenna; and a packaging layer that covers the liquid metal temperature-sensing part, the aluminum-based antenna, and the chip. The technical solution of the present invention can enable the temperature-sensitive electronic tag to have a lower cost and better stability, is suitable for large-scale popularization and application, and is easy to be directly combined with the Internet of Things technology.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic tags, and in particular to a temperature-sensitive electronic tag. Background Art

[0002] For temperature-sensitive tags, the core component is mostly a structure called a Time-Temperature Indicator. Temperature-sensitive tags can record the temperature-time history of the item being detected during various processes such as production, processing, storage, transportation, and sales. Such electronic tags are mostly used to monitor fresh products, drugs, vaccines, and other medical supplies to detect whether they have been exposed to a high-temperature environment for too long, resulting in deterioration and damage.

[0003] Common temperature-sensitive tags are mainly polymeric, diffusive, and enzymatic tags. These three types of electronic tags have high prices, poor stability, are not suitable for large-scale promotion and use, and are difficult to directly integrate with Internet of Things technology. Summary of the Invention

[0004] The present invention provides a temperature-sensitive electronic tag, which can make the temperature-sensitive electronic tag have a lower cost, better stability, be suitable for large-scale promotion and application, and be easily directly integrated with Internet of Things technology.

[0005] The present invention provides a temperature-sensitive electronic tag, adopting the following technical solution:

[0006] The temperature-sensitive electronic tag includes:

[0007] A substrate;

[0008] An aluminum-based antenna, which is located on the substrate;

[0009] A chip, which is attached to the substrate, and the chip is connected to the aluminum-based antenna;

[0010] A liquid metal temperature-sensing part, which overlaps at least part of the aluminum-based antenna. The liquid metal temperature-sensing part is used to cause a chemical reaction of the aluminum-based antenna when the ambient temperature is equal to or higher than a preset temperature, so as to change the structure and / or resistance of the aluminum-based antenna;

[0011] An encapsulation layer, which covers the liquid metal temperature-sensing part, the aluminum-based antenna, and the chip.

[0012] Optionally, a porous isolation layer is provided between the liquid metal temperature-sensing part and the aluminum-based antenna, and the melting point of the liquid metal temperature-sensing part is the preset temperature.

[0013] Further, the pore diameter of the holes in the porous isolation layer is 100 microns to 10 millimeters.

[0014] Optionally, the liquid metal temperature sensing part includes a porous structure and liquid metal filled in the pores of the porous structure, and the melting point of the liquid metal is equal to or higher than the preset temperature.

[0015] Optionally, the liquid metal temperature sensing part includes microcapsules that release at the preset temperature, and the core of the microcapsules is liquid metal.

[0016] Optionally, the temperature-sensitive electronic tag further includes a reaction promoting part in contact with the liquid metal temperature sensing part and / or the aluminum-based antenna, and the reaction promoting part includes water.

[0017] Optionally, the water included in the reaction promoting part contains anions of halogen elements.

[0018] Optionally, the reaction promoting part is one of a water droplet, a microcapsule with water as the core that releases at the preset temperature, a hydrogel, a gel, a jelly, a hydrosol, a non-woven fabric infiltrated with water, and a blotting paper infiltrated with water.

[0019] Optionally, the liquid metal temperature sensing part overlaps with the electromagnetic coupling coil position of the aluminum-based antenna.

[0020] Optionally, the liquid metal temperature sensing part includes a plurality of parts located at different positions, wherein each part is respectively used to cause a chemical reaction of the aluminum-based antenna at different ambient temperatures, or each part is respectively used to cause a chemical reaction of the aluminum-based antenna at different reaction rates at the same ambient temperature.

[0021] Optionally, the temperature-sensitive electronic tag further includes a heat insulation layer, and the heat insulation layer is located on the encapsulation layer.

[0022] Optionally, the liquid metal in the liquid metal temperature sensing part is one of gallium element, indium element, tin element, mercury element, lead element, or the liquid metal in the liquid metal temperature sensing part is an alloy formed by several of gallium, indium, tin, mercury, and lead.

[0023] The present invention provides a temperature-sensitive electronic tag, which includes: a substrate; an aluminum-based antenna located on the substrate; a chip attached to the substrate and connected to the aluminum-based antenna; a liquid metal temperature-sensing part that overlaps with at least a part of the aluminum-based antenna, and the liquid metal temperature-sensing part is used to cause a chemical reaction of the aluminum-based antenna when the ambient temperature is equal to or higher than a preset temperature, so as to change the structure and / or resistance of the aluminum-based antenna; a packaging layer that covers the liquid metal temperature-sensing part, the aluminum-based antenna, and the chip. After the temperature-sensitive electronic tag is fixed to an item, when the temperature of the item (i.e., the ambient temperature of the temperature-sensitive electronic tag) reaches or exceeds the preset temperature, the liquid metal temperature-sensing part will cause a chemical reaction of the aluminum-based antenna, changing the structure and / or resistance of the aluminum-based antenna, causing the temperature-sensitive electronic tag to fail or the communication distance to change. By reading the temperature-sensitive electronic tag with a reader, it can be known whether the temperature of the item has reached the preset temperature. This temperature-sensitive electronic tag senses the change in the temperature of the item by physical means, has a low cost and good stability, is suitable for large-scale promotion and application, and is easy to be directly combined with Internet of Things technology. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Structural schematic diagram of the temperature-sensitive electronic tag provided by the embodiment of the present invention Figure 1 ;

[0026] Figure 2 Schematic diagram of the positional relationship between the liquid metal temperature-sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 1 ;

[0027] Figure 3 Schematic diagram of the positional relationship between the liquid metal temperature-sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 2 ;

[0028] Figure 4 Schematic diagram of the positional relationship between the liquid metal temperature-sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 3 ;

[0029] Figure 5 Schematic diagram of the positional relationship between the liquid metal temperature-sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 4 ;

[0030] Figure 6 Schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 5 ;

[0031] Figure 7 Schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 6 ;

[0032] Figure 8 Schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 7 ;

[0033] Figure 9 Schematic diagram of the structure of the temperature-sensitive electronic tag provided by the embodiment of the present invention Figure 2 。 Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that the technical features in the embodiments of the present invention can be combined with each other without conflict.

[0036] The embodiment of the present invention provides a temperature-sensitive electronic tag. Specifically, as Figure 1 shown Figure 1 Schematic diagram of the structure of the temperature-sensitive electronic tag provided by the embodiment of the present invention Figure 1 , the temperature-sensitive electronic tag includes:

[0037] Substrate 1;

[0038] Aluminum-based antenna 2, and the aluminum-based antenna 2 is located on the substrate 1;

[0039] Chip 3, the chip 3 is attached to the substrate 1, and the chip 3 is connected to the aluminum-based antenna 2;

[0040] Liquid metal temperature sensing part 4, the liquid metal temperature sensing part 4 overlaps with at least part of the aluminum-based antenna 2, and the liquid metal temperature sensing part 4 is used to cause a chemical reaction of the aluminum-based antenna 2 when the ambient temperature is equal to or higher than a preset temperature, so as to change the structure and / or resistance of the aluminum-based antenna 2;

[0041] Encapsulation layer 5, and the encapsulation layer 5 covers the liquid metal temperature sensing part 4, the aluminum-based antenna 2 and the chip 3.

[0042] Among them, the "preset temperature" can be selected according to the suitable temperature range of the item. The preset temperature should be the upper limit of the suitable temperature range of the item, or slightly higher than the upper limit. For example, if the suitable temperature range for storing or transporting the item is within the range of -20°C to 15°C, then the preset temperature can be set to 15°C or above 15°C.

[0043] It should be noted that the reaction rate of the chemical reaction of the aluminum-based antenna 2 is exponentially related to the ambient temperature. That is, when the ambient temperature is lower than the preset temperature, the aluminum-based antenna 2 may not undergo a chemical reaction at all, or may undergo a chemical reaction at a very slow reaction rate, and this chemical reaction is not sufficient to cause structural and / or resistance changes in the aluminum-based antenna 2. As the temperature rises, the reaction rate of the chemical reaction of the aluminum-based antenna 2 gradually increases until the ambient temperature reaches the preset temperature, and the aluminum-based antenna 2 undergoes an obvious chemical reaction to change its structure and / or resistance.

[0044] When the ambient temperature of the liquid metal temperature sensing part 4 is equal to or higher than the preset temperature, the liquid metal therein can be in a liquid state or a solid state, as long as it can achieve the purpose of causing a chemical reaction in the aluminum-based antenna 2. Among them, when the liquid metal in the liquid metal temperature sensing part 4 is in a liquid state, the contact between the liquid metal and the aluminum-based antenna 2 is more sufficient, and the reaction rate of the chemical reaction that can occur in the aluminum-based antenna 2 can be faster. Those skilled in the art can make a selection according to factors such as the requirement for the temperature sensitivity of the temperature-sensitive electronic tag.

[0045] Of course, for the convenience of using the temperature-sensitive electronic tag, as Figure 1 shown, the temperature-sensitive electronic tag in the embodiment of the present invention may further include an adhesive layer 6 and a release paper 7. The adhesive layer 6 is located on the side of the substrate 1 away from the aluminum-based antenna 2, and the release paper 7 is located on the side of the adhesive layer 6 away from the substrate 1. When using this temperature-sensitive electronic tag, only need to tear off the release paper 7, and the temperature-sensitive electronic tag can be pasted on the item through the adhesive layer 6.

[0046] After the temperature-sensitive electronic tag is fixed on the item, when the temperature of the item (i.e., the ambient temperature of the temperature-sensitive electronic tag) reaches or exceeds the preset temperature, the liquid metal temperature sensing part 4 will cause a chemical reaction in the aluminum-based antenna 2, causing changes in the structure and / or resistance of the aluminum-based antenna 2, so that the temperature-sensitive electronic tag fails or the communication distance changes. By reading the temperature-sensitive electronic tag with a reader, it can be known whether the temperature of the item has reached the preset temperature. This temperature-sensitive electronic tag senses the change in the temperature of the item by physical means, has a low cost, good stability, is suitable for large-scale popularization and application, and is easy to be directly combined with the Internet of Things technology.

[0047] In addition, during the use of the temperature-sensitive electronic tag, if the temperature of the object returns to below the preset temperature, the chemical reaction of the aluminum-based antenna 2 will be delayed or stopped. The degree of chemical reaction of the aluminum-based antenna 2 can be used to understand the time when the temperature of the object is higher than or equal to the preset temperature, and / or the degree to which the temperature of the object is higher than the preset temperature.

[0048] The temperature-sensitive electronic tag provided by the embodiment of the present invention can be widely used in a method system for preserving freshness during production, transportation, distribution, storage, and sales, so as to control the temperature of the product within a certain range and prevent the product from deteriorating due to temperature changes. Moreover, the changes in the temperature-sensitive electronic tag are irreversible, which can be easily recognized by production, transportation practitioners, and consumers. However, the temperature-sensitive tags in the prior art are not only costly, but also mostly not electronic tags. Additional equipment and devices are required when connecting to the Internet of Things. Moreover, the radio frequency tags used in the Internet of Things, especially in the cold chain logistics, mostly do not have the anti-counterfeiting function of irreversible changes and are not easily recognized by production, transportation practitioners, and consumers.

[0049] The following embodiments of the present invention describe in detail the various structures included in the temperature-sensitive electronic tag.

[0050] Optionally, the substrate 1 in the embodiment of the present invention may be a common substrate such as PET, PI, PVC, PBT, rubber, ABS, coated paper, printing paper, etc.

[0051] Optionally, the aluminum-based antenna 2 in the embodiment of the present invention can be made by etching, machining, printing and other processes. When the aluminum-based antenna 2 is made by etching and machining processes, the material used can be aluminum element or aluminum alloy, etc. When the aluminum-based antenna 2 is made by printing, the material used can be conductive aluminum paste, conductive aluminum ink, conductive aluminum silver paste, etc.

[0052] Optionally, the chip 3 in the embodiment of the present invention can be connected to the aluminum-based antenna 2 by welding. In addition, if necessary, the connection between the chip 3 and the aluminum-based antenna 2 can be reinforced by ordinary fixing glue or anisotropic conductive glue.

[0053] Optionally, the liquid metal in the liquid metal temperature sensing part 4 in the embodiment of the present invention may be one of gallium, indium, tin, mercury, and lead, or the liquid metal in the liquid metal temperature sensing part may be an alloy formed by several of gallium, indium, tin, mercury, and lead.

[0054] Among them, when the ambient temperature is equal to or higher than the preset temperature, the principle that the liquid metal temperature sensing part 4 causes a chemical reaction in the aluminum-based antenna 2 is that the elements other than gallium in the liquid metal can promote the chemical reaction between aluminum and water (which can come from the environment where the temperature-sensitive electronic tag is located or from inside the temperature-sensitive electronic tag), change the structure and resistance of the aluminum-based antenna 2, and the gallium in the liquid metal can react with aluminum to form an alloy, causing a change in the resistance of the aluminum-based antenna 2. The alloying reaction between gallium and aluminum only causes a change in the resistance of the aluminum-based antenna 2. Although this change cannot be intuitively detected, it does not require water to participate in the chemical reaction and can be used in a relatively dry environment.

[0055] Since the liquid metals in the liquid metal temperature sensing part 4 are different, the temperatures at which they cause an obvious chemical reaction in the aluminum-based antenna 2 are different, that is, the preset temperatures corresponding to the temperature-sensitive electronic tags are different. Therefore, the liquid metal in the liquid metal temperature sensing part 4 can be selected according to the usage scenario of the temperature-sensitive electronic tag. For example, when the liquid metal in the liquid metal temperature sensing part 4 is elemental gallium, the preset temperature corresponding to the temperature-sensitive electronic tag is about 4°C, and when the liquid metal in the liquid metal temperature sensing part 4 is a gallium-indium-tin eutectic alloy, the preset temperature corresponding to the temperature-sensitive electronic tag is about -10°C.

[0056] Of course, functional powders can also be mixed in the liquid metal, and one or several of a polymer binder, a wetting agent, a dispersant, a leveling agent, etc. can also be mixed if necessary.

[0057] It should be noted that there are various ways to implement "the liquid metal temperature sensing part 4 overlaps with at least part of the aluminum-based antenna 2". The embodiments of the present invention will be described by way of examples from two aspects: the stacking method, the contact method, and the overlapping position.

[0058] Optionally, in the embodiments of the present invention, the aluminum-based antenna 2 can be a single-layer structure or a multi-layer structure, and the liquid metal temperature sensing part 4 can be a single-layer structure or a multi-layer structure. Exemplarily, when both the aluminum-based antenna 2 and the liquid metal temperature sensing part 4 are single-layer structures, the liquid metal temperature sensing part 4 can be located on the side of the aluminum-based antenna 2 away from the substrate 1 or on the side of the aluminum-based antenna 2 close to the substrate 1. Figure 1 Taking the case where the liquid metal temperature sensing part 4 can be located on the side of the aluminum-based antenna 2 away from the substrate 1 as an example; when at least one of the aluminum-based antenna 2 and the liquid metal temperature sensing part 4 is a multi-layer structure, the aluminum-based antenna 2 and the liquid metal temperature sensing part 4 can be arranged in an overlapping and spaced manner.

[0059] Optionally, in the embodiments of the present invention, there are various ways for the liquid metal temperature sensing part 4 to contact the aluminum-based antenna 2, and those skilled in the art can select according to actual needs.

[0060] In the first example, as Figure 1As shown, the liquid metal temperature sensing part 4 can be in direct contact with the aluminum-based antenna 2. At this time, the contact area between the liquid metal temperature sensing part 4 and the aluminum-based antenna 2 is large, and the temperature sensitivity of the temperature-sensitive electronic tag is high. In addition, when the ambient temperature is equal to or higher than the preset temperature, whether the liquid metal in the liquid metal temperature sensing part 4 is in a solid state or a liquid state, it can cause an obvious chemical reaction on the aluminum-based antenna 2.

[0061] In the second example, as Figure 2 shown, Figure 2 is a schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by an embodiment of the present invention Figure 1 , a porous isolation layer 8 is provided between the liquid metal temperature sensing part 4 and the aluminum-based antenna 2. The melting point of the liquid metal temperature sensing part 4 is the preset temperature. At this time, when the temperature of the article is higher than or equal to the preset temperature, the liquid metal temperature sensing part 4 melts, and the liquid metal in a liquid state reaches the aluminum-based antenna 2 through the porous isolation layer 8, causing a chemical reaction on the aluminum-based antenna 2. The setting of the porous isolation layer 8 allows for a certain time interval between the melting of the liquid metal temperature sensing part 4 to the contact between the liquid metal in a liquid state and the aluminum-based antenna 2, which can reduce the temperature sensitivity of the temperature-sensitive electronic tag.

[0062] Optionally, the aperture of the holes 81 in the porous isolation layer 8 is 100 microns to 10 millimeters, so that the liquid metal in a liquid state can pass through the holes 81 in the porous isolation layer 8, and the porous isolation layer 8 can play a good isolation role. Optionally, the coverage area of the porous isolation layer 8 is greater than or equal to the coverage area of the liquid metal temperature sensing part 4.

[0063] In the third example, as Figure 3 shown, Figure 3 is a schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by an embodiment of the present invention Figure 2 , the liquid metal temperature sensing part 4 includes a porous structure 41 and liquid metal 42 filled in the holes of the porous structure 41. The melting point of the liquid metal 42 is higher than or equal to the preset temperature. It can also play a role in delaying the chemical reaction. Since the liquid metal 42 in the liquid metal temperature sensing part 4 will be in direct contact with the aluminum-based antenna 2, therefore, whether the liquid metal 42 is in a solid state or a liquid state at the preset temperature, it can cause a chemical reaction on the aluminum-based antenna 2.

[0064] In the fourth example, as Figure 4 shown, Figure 4 is a schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by an embodiment of the present invention Figure 3, the liquid metal temperature sensing part 4 includes microcapsules that release at a preset temperature, and the core of the microcapsules is liquid metal. The melting point of the liquid metal here can be lower than, higher than, or equal to the preset temperature, and can be specifically selected according to the reaction rate of the chemical reaction of the aluminum-based antenna 2, etc. Optionally, the material of the capsule wall included in the microcapsules is one or several of paraffin, polyethylene oxide, polypropylene oxide, and block polyether, and can be specifically selected according to the preset temperature.

[0065] Optionally, in the embodiments of the present invention, there can be various choices for the overlapping position of the liquid metal temperature sensing part 4 and the aluminum-based antenna 2. For example, the liquid metal temperature sensing part 4 is a whole-layer structure, and it overlaps with all positions of the aluminum-based antenna 2, or the shape of the liquid metal temperature sensing part 4 is exactly the same as that of the aluminum-based antenna 2, and it overlaps with all positions of the aluminum-based antenna 2, or the liquid metal temperature sensing part 4 overlaps with a part of the aluminum-based antenna 2, such as Figure 5 shown, Figure 5 is a schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by the embodiments of the present invention Figure 4 , the liquid metal temperature sensing part 4 overlaps with the electromagnetic coupling coil position of the aluminum-based antenna 2.

[0066] Among them, since the electromagnetic coupling coil can directly determine whether the chip in the electronic tag works, therefore, when the liquid metal temperature sensing part 4 overlaps with the electromagnetic coupling coil position, when the temperature of the item is higher than or equal to the preset temperature, the liquid metal temperature sensing part 4 causes a chemical reaction at the electromagnetic coupling coil position of the aluminum-based antenna 2, making the temperature-sensitive electronic tag more likely to fail and having better sensitivity to temperature. When the aluminum-based antenna 2 includes a feeder, the liquid metal temperature sensing part 4 can also overlap with the feeder of the aluminum-based antenna 2, and a good temperature-sensitive effect can also be achieved.

[0067] Optionally, in the embodiments of the present invention, as selected, such as Figure 6 and Figure 7 shown, Figure 6 and Figure 7 are respectively schematic diagrams of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by the embodiments of the present invention Figure 5 and Six , the liquid metal temperature sensing part 4 includes multiple parts located at different positions. Among them, as Figure 6 shown, each part is respectively used to cause a chemical reaction of the aluminum-based antenna 2 at different ambient temperatures, or, as Figure 7 shown, each part is respectively used to cause a chemical reaction of the aluminum-based antenna 2 at different reaction rates at the same ambient temperature, so as to obtain more temperature information of the item through one temperature-sensitive electronic tag.

[0068] Optionally, as Figure 8 shown, Figure 8Schematic diagram of the positional relationship between the liquid metal temperature sensing part and the aluminum-based antenna provided by the embodiment of the present invention Figure 7 In order to prevent the temperature sensitivity of the temperature-sensitive electronic tag from being too poor in a dry environment or to make the temperature-sensitive electronic tag applicable to items that are particularly sensitive to temperature, the temperature-sensitive electronic tag in the embodiment of the present invention further includes a reaction promotion part 9 that contacts the liquid metal temperature sensing part 4 and / or the aluminum-based antenna 2. The reaction promotion part 9 includes water to provide sufficient water for a chemical reaction with the aluminum-based antenna 2, so that the reaction rate of the chemical reaction of the aluminum-based antenna 2 is relatively fast.

[0069] Exemplarily, the reaction promotion part 9 can be one of a water droplet, a microcapsule with water as the core that releases at a preset temperature, a hydrogel, a gel, a jelly, a sol, a non-woven fabric infiltrated with water, and a blotting paper infiltrated with water. Optionally, the material of the capsule wall included in the microcapsule is one or several of paraffin, polyethylene oxide, polypropylene oxide, and block polyether, and can be specifically selected according to the preset temperature.

[0070] Exemplarily, the water included in the reaction promotion part contains anions of halogen elements, such as Cl - ,Br - ,F - etc. The anions of the halogen elements can effectively remove the oxides on the aluminum-based antenna 2 and further accelerate the chemical reaction of the aluminum-based antenna 2.

[0071] Optionally, as Figure 9 shown, Figure 9 Schematic diagram of the structure of the temperature-sensitive electronic tag provided by the embodiment of the present invention Figure 2 The temperature-sensitive electronic tag in the embodiment of the present invention further includes a heat insulation layer 10, and the heat insulation layer 10 is located on the encapsulation layer 5, so that the temperature-sensitive electronic tag can accurately reflect the temperature change of the item and is not easily affected by external heat radiation, convection, etc. Exemplarily, the material of the heat insulation layer 10 is one or several of aerogel, rock wool, foamed polyurethane, phenolic foam, and foamed polystyrene.

[0072] Optionally, the bottom glue layer 6 in the embodiment of the present invention is a double-sided bottom glue layer, which can be directly attached to the substrate 1 on one side and used to paste the temperature-sensitive electronic tag on the item on the other side, with simple operation and convenient use. Exemplarily, the bottom glue layer 6 is polyurethane or polyacrylate.

[0073] It should be noted that the manufacturing process and the temperature of the storage environment of the temperature-sensitive electronic tag provided by the embodiment of the present invention should be lower than the preset temperature to ensure that the temperature-sensitive electronic tag will not fail.

[0074] In addition, based on the prior art, by reasonably selecting and varying the structures in the temperature-sensitive electronic tag in the embodiments of the present invention, the temperature-sensitive electronic tag in the embodiments of the present invention can also have one or several characteristics such as anti-metal and wash resistance, and the temperature-sensitive electronic tag in the embodiments of the present invention can also be applied to textiles. The embodiments of the present invention will not elaborate on this any further.

[0075] Embodiments of the present invention provide a temperature-sensitive electronic tag, which includes: a substrate 1; an aluminum-based antenna 2 located on the substrate 1; a chip 3 attached to the substrate 1 and connected to the aluminum-based antenna 2; a liquid metal temperature-sensing part 4 overlapping with at least part of the aluminum-based antenna 2, and the liquid metal temperature-sensing part 4 is used to cause a chemical reaction of the aluminum-based antenna 2 when the ambient temperature is equal to or higher than a preset temperature, changing the structure and / or resistance of the aluminum-based antenna 2; a packaging layer 5 covering the liquid metal temperature-sensing part 4, the aluminum-based antenna 2, and the chip 3. After the temperature-sensitive electronic tag is fixed to an item, when the temperature of the item reaches or exceeds the preset temperature, the liquid metal temperature-sensing part 4 will cause a chemical reaction of the aluminum-based antenna 2, changing the structure and / or resistance of the aluminum-based antenna 2, so that the temperature-sensitive electronic tag fails or the communication distance changes. By reading the temperature-sensitive electronic tag with a reader, it can be known whether the item has reached the preset temperature. This temperature-sensitive electronic tag senses the change in the temperature of the item by physical means, has a low cost and good stability, is suitable for large-scale popularization and application, and is easy to be directly combined with Internet of Things technology.

[0076] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature-sensitive electronic tag, characterized in that, include: Base material; an aluminum-based antenna, the aluminum-based antenna being located on the substrate; A chip, wherein the chip is attached to the substrate and connected to the aluminum-based antenna; A liquid metal temperature sensing portion, the liquid metal temperature sensing portion overlaps with at least a portion of the aluminum-based antenna, and the liquid metal temperature sensing portion is used to cause the aluminum-based antenna to undergo a chemical reaction when the ambient temperature is equal to or higher than a preset temperature, thereby changing the structure and / or resistance of the aluminum-based antenna; A packaging layer, wherein the packaging layer covers the liquid metal temperature sensing portion, the aluminum-based antenna and the chip.

2. The temperature-sensitive electronic tag according to claim 1, wherein A porous isolation layer is provided between the liquid metal temperature sensing portion and the aluminum-based antenna, and the melting point of the liquid metal temperature sensing portion is the preset temperature.

3. The temperature-sensitive electronic tag according to claim 1, characterized in that, The liquid metal temperature sensing portion includes a porous structure and liquid metal filled in the holes of the porous structure, and the melting point of the liquid metal is equal to or higher than the preset temperature.

4. The temperature-sensitive electronic tag according to claim 1, wherein The liquid metal temperature sensing portion includes a microcapsule released at the preset temperature, and the capsule core of the microcapsule is liquid metal.

5. The temperature-sensitive electronic tag according to claim 1, wherein The liquid metal temperature sensing part includes a plurality of parts located at different positions, wherein each part is used to cause the aluminum-based antenna to undergo a chemical reaction at a different ambient temperature, or each part is used to cause the aluminum-based antenna to undergo a chemical reaction at a different reaction rate at the same ambient temperature.

6. The temperature-sensitive electronic tag according to claim 1, characterized in that, The invention also includes a reaction promoting part in contact with the liquid metal temperature sensing part and / or the aluminum-based antenna, wherein the reaction promoting part includes water.

7. The temperature-sensitive electronic tag according to claim 6, wherein The reaction promoting part includes water containing anions of halogen elements.

8. The temperature-sensitive electronic tag according to claim 6, wherein The reaction promoting part is one of water droplets, microcapsules with water as the core that are released at the preset temperature, hydrogels, jelly, jello, hydrosol, non-woven fabric soaked in water, and absorbent paper soaked in water.

9. The temperature-sensitive electronic tag according to claim 1, wherein A heat insulating layer is also included, and the heat insulating layer is located on the packaging layer.

10. The temperature-sensitive electronic tag according to claim 1, wherein, The liquid metal in the liquid metal temperature sensing portion is one of gallium, indium, tin, mercury, and lead, or the liquid metal in the liquid metal temperature sensing portion is an alloy formed by several of gallium, indium, tin, mercury, and lead.

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