WO2022056681A1

WO2022056681A1 - Anti-metal micro radio frequency sensor

Info

Publication number: WO2022056681A1
Application number: PCT/CN2020/115364
Authority: WO
Inventors: 焦林
Original assignee: 焦林
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2022-03-24

Abstract

Disclosed in the present application is an anti-metal micro radio frequency sensor, comprising a radio frequency chip, an antenna layer, and an isolation layer from outside to inside. The radio frequency chip is fixed on the surface of the antenna layer; the isolation layer is provided between the antenna layer and an attached substance; the antenna layer comprises an inner loop antenna and an outer loop antenna; the inner loop antenna and the outer loop antenna are connected by means of a connection wire; and the radio frequency chip is provided above the connection wire. According to the design of the present application, the isolation layer is provided between the antenna layer and the attached substance, and the distance between the radio frequency sensor and a metal is increased by means of the isolation layer; the antenna layer uses loop antennas, and the inner diameter of the outer loop antenna is less than 5 mm, so that the effects of being small in antenna area and low in energy required for signal transmission are achieved, and thus, the antenna layer reduces, by providing the isolation layer, the influence caused by the metal, so as to achieve the effect of protecting against a metal influence; moreover, a manufacturing process is simplified, the cost is reduced, and the antenna layer having a small size can be attached on any metal object or metal package.

Description

An anti-metal miniature radio frequency sensor

technical field

The utility model relates to the technical field of RFID, in particular to an anti-metal miniature radio frequency sensor.

Background technique

Electronic tag, namely RFID tag, is a non-contact automatic identification sensor, which uses radio frequency signal to identify the relevant data of the target object, and the identification work does not require manual intervention. It has a wide range of applications in today's rapid development of information technology. One of the application methods is for anti-counterfeiting. Brands can customize RFID tags with brand logos and specific signals, and identify the authenticity of products through RFID tags, so as to achieve the purpose of anti-counterfeiting.

Existing miniature anti-metal ceramic RFID tags can be installed on metal, but due to their thickness of more than 1.5 mm, they cannot be installed on small-sized watches, jewelry, handbags and other metal-containing luxury goods. The manufacturing process of metal RFID tags is complicated, resulting in high cost, and it cannot be applied to the metal packaging of ordinary products or products with metal packaging. Another radio frequency antenna, such as the radio frequency antenna in "An RF resonant cavity assembly with an antenna and a chip plane crossing the plane" of the patent application No. 201920830524.1, although the area and thickness are extremely small, because it is directly pasted to the metal surface for use, Metal has the property of absorbing microwave energy, which causes traditional UHF RFID tags attached to metal objects to not work properly.

Therefore, the field of radio frequency technology needs a small-sized, simple and low-cost anti-metal radio frequency tag that can be installed on metal objects and metal packaging, which can be used for watches, jewelry, metal products, metal bottle caps, and aluminum foil packaging cigarettes. , aluminum foil packaging drugs, etc. to provide anti-counterfeiting traceability.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the utility model provides an anti-metal miniature radio frequency sensor.

The technical scheme of the present utility model is as follows:

An anti-metal miniature radio frequency sensor includes a radio frequency chip, an antenna layer and an isolation layer from the outside to the inside, the radio frequency chip is fixed on the surface of the antenna layer, and the isolation layer is arranged between the antenna layer and the attachment, The antenna layer includes an inner loop antenna and an outer loop antenna, the inner loop antenna and the outer loop antenna are connected in series through a connecting wire, and the radio frequency chip is arranged above the connecting wire.

In the above-mentioned anti-metal miniature radio frequency sensor, an antenna base layer is arranged between the antenna layer and the isolation layer, and the antenna base layer includes a PET base film layer, the inner loop antenna, the outer loop antenna and the The connecting line is arranged on the surface of the antenna base layer.

Further, the antenna base layer includes a PET base film layer, and the inner loop antenna, the outer loop antenna and the connecting wire are disposed on the surface of the PET base film layer.

Further, the antenna base layer is provided with anti-reveal nicks, and the anti-reveal nicks penetrate the antenna base layer.

Still further, the width of the anti-reveal score is 0.1 mm, and the depth is less than 0.1 mm.

Still further, the anti-reveal nicks are distributed in the shape of fracture lines.

Still further, the number of the anti-reveal nicks is two, and the anti-reveal nicks are distributed in a cross shape.

In the above-mentioned anti-metal miniature radio frequency sensor, the isolation layer is a fragile resin layer.

Further, the thickness of the isolation layer is greater than or equal to 0.6 mm.

In the above-mentioned anti-metal miniature radio frequency sensor, the anti-metal miniature radio frequency sensor is provided with a central through hole.

In the above-mentioned anti-metal miniature radio frequency sensor, one end of the connecting wire is connected to the terminal of the inner loop antenna, and the other end is connected to the starting end of the outer loop antenna.

In the above-mentioned anti-metal miniature radio frequency sensor, the anti-metal miniature radio frequency sensor is pasted and connected to the attachment through resin glue.

Further, the resin glue coats the anti-metal miniature radio frequency sensor.

In the above-mentioned anti-metal miniature radio frequency sensor, the connecting line between the starting end of the inner loop antenna and the terminal end of the outer loop antenna is perpendicular to the connecting line.

According to the utility model of the above scheme, the beneficial effect is that the utility model is designed to set an isolation layer between the antenna layer and the attachment, and increase the distance between the radio frequency sensor and the metal through the isolation layer. Since the antenna layer adopts a loop antenna, and The inner diameter of the outer loop antenna is less than 5 mm, which achieves the effect of small antenna area and low energy required for signal transmission, so that the antenna layer can be provided with an isolation layer to reduce the influence caused by metal, so as to achieve the effect of resisting the influence of metal, and simplify the The production process reduces costs, and can be attached to any metal object or metal package with a tiny volume to realize the function of identifying anti-counterfeiting traceability. Because the utility model relies on glue to be fixed on the metal object or metal package, when it is separated from the attachment, the external force makes it break along the anti-reveal notch, destroys the integrity of the radio frequency sensor, and makes it lose the radio frequency function. The utility model cannot be used twice and meets the anti-counterfeiting needs.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present utility model. For some new embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural diagram 1 of the present utility model.

FIG. 2 is a second structural schematic diagram of the utility model.

FIG. 3 is a schematic structural diagram of the utility model installed on the surface of a metal object.

FIG. 4 is a schematic structural diagram of the utility model installed at the joint of the metal bottle cap and the bottle body.

FIG. 5 is a schematic structural diagram of the utility model installed on the inner surface layer of the boxed cigarette cigarette label paper.

Figure 6 is a schematic structural diagram of the utility model being installed on the front of the boxed cigarette cigarette label paper.

FIG. 7 is a schematic structural diagram of the utility model embedded in the inside of the handle of the watch.

FIG. 8 is a schematic diagram of the structure of the utility model embedded in the interior of the metal LOGO.

FIG. 9 is a partial enlarged view of FIG. 8 .

FIG. 10 is a schematic structural diagram of the utility model installed on the aluminum foil package of medicines.

Fig. 11 is a partial structural schematic diagram of the utility model installed on the aluminum foil packaging of medicines.

Among them, each reference sign in the figure:

1. Anti-metal micro RF sensor; 11. RF chip; 12. Antenna layer; 13. Isolation layer; 14. Center through hole; 15. Antenna base layer;

2. Resin glue;

3. Metal objects;

4. Metal bottle cap; 5. Bottle body;

6. Boxed cigarettes; 61. Boxed cigarettes cigarette label paper;

7. Watch handle; 71. Watch handle assembly; 72. Watch handle decoration;

8. Metal LOGO; 81. The pit on the metal LOGO;

9. Tablet blister board aluminum foil board; 91. Gap; 92. High viscosity tape; 93. Blister board PE base layer; 94. Blister board aluminum foil layer.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

It should be noted that when a component is referred to as being "fixed" or "disposed" or "connected" to another component, it can be directly or indirectly located on the other component. The positions or positions indicated by the terms "inside", "outside", etc. are based on the positions or positions shown in the drawings, which are only for the convenience of description and should not be construed as a limitation on the technical solution.

An anti-metal miniature radio frequency sensor, as shown in Figures 1 and 2, includes a radio frequency chip 11, an antenna layer 12 and an isolation layer 13 from the outside to the inside. The radio frequency chip 11 is fixed on the surface of the antenna layer 12, and the isolation layer 13 is arranged on the antenna. Between the layer 12 and the attachment, the antenna layer 12 includes an inner loop antenna and an outer loop antenna, the inner loop antenna and the outer loop antenna are connected by a connecting wire, and the radio frequency chip 11 is arranged above the connecting wire.

The utility model designs an isolation layer 13 between the antenna layer 12 and the attachment, and increases the distance between the radio frequency sensor and the metal through the isolation layer 13. Since the antenna layer 12 adopts an inner and outer loop series antenna, and the inner diameter of the outer loop antenna is less than 5 mm , to achieve the effect that the antenna area is small and the energy required to transmit the signal is very low, so that the antenna layer 12 can greatly reduce the influence caused by the metal by setting the isolation layer 13, so as to achieve the effect of resisting the influence of the metal, and at the same time simplify the manufacturing process, Reduce cost, can be attached to any metal object or metal package with a tiny volume.

As shown in FIG. 1 and FIG. 2 , the antenna base layer 15 is provided with an anti-reveal score 16, and the anti-reveal score 16 is engraved on the antenna base layer 15 by laser, and the anti-reveal score 16 penetrates the antenna base layer 15, preventing The peeling marks 16 are distributed in a discontinuous line to ensure that the aluminum foil antenna is not completely cut off. The two anti-reveal notches 16 are perpendicular to each other and intersect in a cross shape.

The isolation layer 13 is a fragile resin layer. When the utility model is peeled off from the metal object 3 or other products, the isolation layer 13 is damaged, along with the tear-proof notches 16, and at the same time, the antenna layer 12 is damaged, and the radio frequency sensor becomes invalid, preventing the utility model as an anti-counterfeiting mark. Reuse ensures that the utility model is a disposable product, so as to play an anti-counterfeiting effect.

Due to the small area of the antenna layer 12, the energy required for receiving and transmitting microwave signals is extremely low, and the range of the radio frequency field is extremely small, so as long as the distance between the antenna layer 12 and the metal is kept within the range of 0.6 mm, the metal to The performance impact of the RF sensor can be reduced to less than 30%. The RF sensor ensures that the distance between the antenna layer 12 and the metal object 3 is greater than 0.6 mm by adding an isolation layer 13, so that the micro RF sensor installed on the metal surface is less affected by the metal, ensuring that it can still have normal read and write functions.

In one embodiment, the thickness of the radio frequency chip 11 is less than 0.12 mm. The thickness of the antenna layer 12 is 0.015 mm. The antenna base layer 15 has a diameter of 4-6 mm and a thickness of 0.05 mm. The isolation layer 13 has a diameter of 4-6 mm and a thickness of 0.6 mm. The diameter of the central through hole 14 is 1.5-2 mm. The tamper-evident score 16 is 0.1 mm wide and less than 0.1 mm deep. The metal-resistant miniature RF sensor 1 has a total thickness of 0.785 mm. In this case, the anti-metal miniature radio frequency sensor 1 has a maximum diameter of less than 6 mm, a small area, and extremely low energy required for radio frequency signal transmission. In an environment without metal objects 3, the reading distance is about 15 mm. If the thickness of the isolation layer 13 is greater than 0.6 mm, the reading distance can be close to 10 mm, which satisfies the purpose of radio frequency identification and signal traceability. Therefore, in this embodiment, the thickness of the isolation layer 13 is greater than 0.6 mm.

Since the miniature radio frequency sensor is a radio frequency source, if there is a metal object 3 or anodized aluminum bronzing film within 1.5 mm of its edge, the metal object 3 or anodized aluminum bronzing film can become the coupling antenna of the radio frequency sensor, which greatly increases the reading of the radio frequency sensor. Write distance. If the metal object 3 is of some specific shape, the identification distance of the micro radio frequency sensor can reach more than 4 meters, and it becomes a radio frequency tag for medium distance identification.

In one embodiment, the metal-resistant miniature radio frequency sensor 1 is provided with a central through hole 14 , as shown in FIG. 3 . The anti-metal miniature radio frequency sensor 1 is pasted and connected to the attachment through the resin glue 2, and the resin glue 2 coats the anti-metal miniature radio frequency sensor 1 and is poured into the central through hole 14 to bond with the attachment.

In one embodiment, as shown in Figure 3, the utility model is installed on the surface of a metal object 3, such as a watch dial surface or a watch pointer for anti-counterfeiting of a watch, or installed on a metal package, such as the surface of an iron box, Aluminum alloy surface, aluminum foil sealing pad, metal metal bottle cap 4, etc., are used for product anti-counterfeiting, identification and positioning and information traceability. In this embodiment, the anti-metal miniature radio frequency sensor 1 is pasted to the surface of the metal object 3 through the resin glue 2, and the resin glue 2 penetrates into and fills the central through hole 14, and coats the anti-metal miniature radio frequency sensor 1 to fix it on the metal object 3 surfaces. Among them, the diameter of the anti-metal miniature radio frequency sensor 1 is 4-6 mm, and the body is very small. After it is attached to the surface of the metal object 3 through the resin glue 2, when the external force peels it off from the surface of the metal object 3, the isolation layer 13 is broken. , the radio frequency chip 11 is separated from the antenna layer 12 with the resin glue 2 , causing the anti-metal micro radio frequency sensor 1 to lose the radio frequency performance, thereby ensuring that it cannot be used twice.

In one embodiment, as shown in FIG. 4 , the utility model is installed at the joint of the metal bottle cap 4 and the bottle body 5 , such as anti-counterfeiting of bottled wine, medicine and cosmetics made of metal, ceramic, plastic and other materials. In this embodiment, the resin glue 2 is applied to the joint of the metal bottle cap 4 and the bottle body 5 , and then the anti-metal micro radio frequency sensor 1 is placed on the surface of the resin glue 2 to be fixed, and then the anti-metal micro radio frequency sensor 1 is placed on the surface of the Add a little resin glue 2 to combine with the resin glue 2 at the bottom, so as to fix the anti-metal miniature radio frequency sensor 1 on the joint of the metal bottle cap 4 and the bottle body 5 . When the metal bottle cap 4 is separated from the bottle body 5, the colloid will be damaged, which will cause the anti-metal micro RF sensor 1 to break and lose its RF performance, thereby ensuring that it cannot be used twice.

In one embodiment, as shown in FIGS. 5 and 6 , the present invention is installed on the packaging of the boxed cigarettes 6 with aluminum foil wrapping paper, which can resist the influence of the aluminum foil packaging on the radio frequency function, and provide anti-counterfeiting for the boxed cigarettes 6 and information traceability. The anti-metal miniature radio frequency sensor 1 is pasted on the inner surface layer of the cigarette label paper 61 of the boxed cigarette through the resin glue 2, and is hidden in the package to provide the boxed cigarette 6 with RFID anti-counterfeiting function. Alternatively, the anti-metal miniature radio frequency sensor 1 is pasted on the front of the boxed cigarette cigarette label 61 through resin glue 2, and it can be visually judged whether the radio frequency chip 11 is included as an anti-counterfeiting operation, and can also provide radio frequency identification anti-counterfeiting effect. Alternatively, the anti-metal miniature radio frequency sensor 1 is pasted on any position of the boxed cigarette 6 through the resin glue 2 to provide radio frequency identification and anti-counterfeiting.

In one embodiment, the utility model is installed on the package of the cigarettes in the strip, which can resist the influence of the laser film on the radio frequency function, and provide anti-counterfeiting and information traceability functions for the cigarettes in the strip. The anti-metal miniature radio frequency sensor 1 is pasted on the seal of the box with aluminum foil paper material or laser film material through resin glue 2. When the box is opened, the anti-metal miniature radio frequency sensor 1 is damaged to ensure that it cannot be reused. Alternatively, the anti-metal micro-RF sensor 1 is pasted on the outer packaging film of the box through the resin glue 2. When the box is opened, the outer packaging film is ruptured. At this time, if the anti-metal micro-RF sensor 1 is removed from the outer packaging film, the , the external force will destroy the integrity of the miniature radio frequency sensor, making it lose its radio frequency performance and ensure that it cannot be used twice.

In one embodiment, the present invention is embedded in a metal object 3, such as a watch handle 7, as shown in Figures 7 and 8, making it a watch handle 7 with radio frequency function. The diameter of the watch handle 7 is 6 mm, the diameter of the anti-metal micro RF sensor 1 is 4 mm, and the thickness is 0.78 mm. The anti-metal miniature radio frequency sensor 1 is arranged between the watch handle head assembly 71 and the watch handle head decoration 72. If an external force separates the anti-metal miniature radio frequency sensor 1 from the watch handle head 7, the isolation layer 13 is broken, and the antenna base layer 15 is driven along the anti-metallic micro-radio frequency sensor 1. The notch 16 is cracked, so that the antenna layer 12 is disconnected, and the anti-metal miniature radio frequency sensor 1 becomes invalid, ensuring that it cannot be used twice.

In an embodiment, the present invention is embedded in a metal object 3 , such as a metal LOGO 8 , as shown in FIG. 9 . A pit is provided on the body of the metal LOGO 8 , and resin glue 2 is arranged at the bottom of the pit, and the anti-metal micro-RF sensor 1 is fixed inside the pit 81 on the metal LOGO through the resin glue 2 . Among them, the pit 81 on the metal LOGO is 4-6 mm in diameter and 0.8 mm in depth, and the thickness of the resin glue 2 is 0.1 mm. The embedded design makes the anti-metal miniature radio frequency sensor 1 not reusable. Therefore, the brand-customized anti-metal miniature radio frequency sensor 1 plays an anti-counterfeiting role. At the same time, the anti-metal radio frequency sensor on the metal LOGO3 can also strengthen the LOGO brand effect.

The embedded anti-metal micro RF sensor1 is suitable for all metal objects3, such as firearms, medical devices, zipper pullers, jewelry, metal tools, metal accessories, etc., providing identification and positioning functions for metal objects, for anti-counterfeiting and information traceability.

In one embodiment, the present invention is installed on the aluminum foil packaging of medicines, as shown in Fig. 10 and Fig. 11 , to provide the function of anti-counterfeiting and traceability for the packaging of medicine tablets. The tablet blister sheet aluminum foil sheet 9 includes a blister sheet PE base layer 93 and a blister sheet aluminum foil layer 94 . A gap 91 with a width of 6 mm and a length of 6 mm is punched or ground at the middle edge of the aluminum foil plate 9 of the tablet cover blister, and the anti-metal micro RF sensor 1 is embedded in the gap 91, and a layer of high viscosity is pasted on it. The adhesive tape 92 ensures that the anti-metal miniature radio frequency sensor 1 is set in the middle position of the gap 91 . Since the anti-metal miniature radio frequency sensor 1 can generate radio frequency coupling when it is close to the metal, the aluminum foil layer 94 of the blister aluminum foil becomes an additional coupling antenna, which greatly enhances the identification efficiency of the anti-metal miniature radio frequency sensor 1, and its reading distance is reduced from 15 mm Can be increased to 450 mm. Preferably, the anti-metal miniature radio frequency sensor 1 is arranged on the long side of the medicine-covered aluminum foil plate, so as to further improve the reading distance of the anti-metal miniature radio frequency sensor 1 .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims

An anti-metal miniature radio frequency sensor is characterized in that, it includes a radio frequency chip, an antenna layer and an isolation layer from the outside to the inside, the radio frequency chip is fixed on the surface of the antenna layer, and the isolation layer is arranged on the antenna layer and the attached layer. Between the objects, the antenna layer includes an inner loop antenna and an outer loop antenna, the inner loop antenna and the outer loop antenna are connected by a connecting wire, and the radio frequency chip is arranged above the connecting wire.
The anti-metal miniature radio frequency sensor according to claim 1, wherein an antenna base layer is provided between the antenna layer and the isolation layer, the antenna base layer comprises a PET base film layer, and the The inner loop antenna, the outer loop antenna and the connecting wire are arranged on the surface of the PET bottom film layer.
The anti-metal miniature radio frequency sensor according to claim 2, wherein the antenna base layer is provided with anti-reveal nicks, and the anti-reveal nicks penetrate the antenna base layer.
The metal-resistant miniature radio frequency sensor according to claim 3, wherein the anti-reveal notch is in the shape of a broken line.
The metal-resistant miniature radio frequency sensor according to claim 1, wherein the isolation layer is a resin layer.
The anti-metal miniature radio frequency sensor according to claim 1, wherein the anti-metal miniature radio frequency sensor is provided with a central through hole.
The metal-resistant miniature radio frequency sensor according to claim 1, wherein one end of the connecting wire is connected to the terminal of the inner loop antenna, and the other end is connected to the starting end of the outer loop antenna.
The anti-metal miniature radio frequency sensor according to claim 1, characterized in that, the anti-metal miniature radio frequency sensor is pasted and connected to the attachment through resin glue.
The anti-metal miniature radio frequency sensor according to claim 1, wherein the connecting line between the starting end of the inner loop antenna and the terminal end of the outer loop antenna is perpendicular to the connecting line.
The metal-resistant miniature radio frequency sensor according to claim 1, wherein the thickness of the isolation layer is greater than or equal to 0.6 mm.