CN209842682U - Radio frequency identification anti-metal tag - Google Patents
Radio frequency identification anti-metal tag Download PDFInfo
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- CN209842682U CN209842682U CN201920823053.1U CN201920823053U CN209842682U CN 209842682 U CN209842682 U CN 209842682U CN 201920823053 U CN201920823053 U CN 201920823053U CN 209842682 U CN209842682 U CN 209842682U
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Abstract
The embodiment of the utility model discloses anti metal label of radio frequency identification, including shell and label, the shell is installed on the metal, is equipped with and accepts the chamber, the label accept in accept the intracavity, the label includes the antenna, wherein, the antenna is the dipole structure, including radiating element, ground element and linkage element, the radiating element with the ground element is relative, the linkage element is connected the radiating element with the ground element. Through the mode, the tag is contained in the shell and is mounted on the metal through the shell, the tag is not in direct contact with the metal, the influence of the metal on impedance matching of the antenna is avoided, and the readable strength of the tag is higher.
Description
Technical Field
The embodiment of the utility model provides an embodiment relates to the electronic tags field, especially relates to an anti metal label of radio frequency identification.
Background
Such a manner of attaching an electronic tag to a product or a package has been commonly used in asset, logistics management, and production work management.
The radio frequency identification anti-metal tag is one of electronic tags, is widely applied and comprises a chip and an antenna, wherein the chip stores information of an article, the information stored in the corresponding tag on the article can be read by a reading system by attaching the radio frequency identification anti-metal tag on the corresponding article, the readable strength of the information of the chip mainly depends on the matching degree between the input impedance of the antenna in the tag and the impedance of the chip, when the matching degree between the antenna and the chip is better, the more power acquired by the antenna from the reading system can be transmitted to the chip, the larger the power transmission value between the antenna and the chip is, the higher the readable strength of the tag is, and the matching degree between the input impedance of the antenna of the radio frequency identification anti-metal tag and the impedance of the chip is related to the structure of the antenna.
At present, a shell is not arranged on a radio frequency identification anti-metal tag, the tag is directly pasted on metal for use, the tag is in direct contact with the metal, the metal can affect the impedance matching between an antenna and a chip, the impedance matching degree between the antenna and the chip is poor, and the radiation efficiency is low.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an aim at providing an anti metal label of radio frequency identification with shell.
In order to solve the above technical problem, an embodiment of the present invention adopts a technical solution that: there is provided a radio frequency identification metal-resistant tag for mounting on metal, comprising:
the non-metal shell is arranged on the metal and is provided with an accommodating cavity;
the tag is accommodated in the accommodating cavity and comprises an antenna, the antenna is of a dipole structure and comprises a radiation unit, a grounding unit and a connection unit, wherein the radiation unit is opposite to the grounding unit, and the connection unit is connected with the radiation unit and the grounding unit.
Optionally, the housing comprises an upper shell and a lower shell;
the accommodating cavity is formed in the upper shell, the antenna is accommodated in the accommodating cavity, and the upper shell and the lower shell are assembled to seal the accommodating cavity.
Optionally, a groove is further formed in the upper shell and used for being assembled with the lower shell, the groove is communicated with the accommodating cavity, and the cross-sectional size of the groove is larger than that of the accommodating cavity;
the lower shell is embedded into the groove, and the upper shell and the lower shell are fixed in an ultrasonic welding mode.
Optionally, a first mounting hole is formed in the upper shell;
a second mounting hole is formed in the position, opposite to the first mounting hole, of the lower shell;
the shell further comprises a screw, and the screw penetrates through the first mounting hole and then is assembled with the second mounting hole to fix the upper shell and the lower shell.
Optionally, the radiation unit and the ground unit are both formed by etching and are both rectangular, wherein the radiation unit is provided with a notch.
Optionally, the notches include a first notch, a second notch, and a third notch;
the radiation unit is provided with a first notch, a second notch and a third notch, wherein the first notch, the second notch and the third notch are all U-shaped grooves, the opening directions of the first notch and the third notch are the same, the opening direction of the second notch is opposite to the opening directions of the first notch and the third notch, and the radiation unit is made to be of a snake-shaped bending structure due to the arrangement of the first notch, the second notch and the third notch.
Optionally, the connecting unit includes two connecting lines, the two connecting lines are parallel to each other, and each connecting line is connected to the radiating unit and the grounding unit.
Optionally, the tag further comprises a chip;
a first matching network is formed among the radiation unit, the grounding unit and the two connecting lines, and a second matching network is formed among the radiation unit;
the chip is connected with the connecting unit and is positioned in the middle of the radiating unit and the grounding unit, and the first matching network and the second matching network are used for adjusting the impedance matching degree between the antenna and the chip.
Optionally, the label further comprises a dielectric layer, and the material of the dielectric layer is engineering plastic;
the dielectric layer is provided with two opposite main surfaces and a side surface positioned between the two main surfaces;
the radiation unit and the grounding unit are respectively attached to the two main surfaces of the dielectric layer, which are opposite to each other, and the connecting unit is attached to the side surface.
Optionally, the label further comprises a plastic layer;
the plastic layer wraps the antenna, the chip and the dielectric layer.
The embodiment of the utility model provides a beneficial effect is: the tag is contained in the shell and is mounted on the metal through the shell, so that the influence of the metal on impedance matching between the antenna and the chip in the tag is avoided, the impedance matching degree between the antenna and the chip is higher, and the readable strength of the tag is higher.
Drawings
Fig. 1 is a schematic structural diagram of an rfid anti-metal tag according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the housing;
FIG. 3 is a schematic diagram of a tag structure;
FIG. 4 is a schematic diagram of the antenna structure;
referring to fig. 1 to 4,300 is an rfid tag, 10 is a housing, 20 is a tag, 11 is an upper housing, 12 is a lower housing, 111 is a receiving cavity, 112 is a recess, 113 is a cylinder, 114 is a first mounting hole, 124 is a second mounting hole, 21 is an antenna, 22 is a dielectric layer, 211 is a radiating element, 212 is a grounding element, 213 is a connecting element, 2111 is a first slot, 2112 is a second slot, and 2113 is a third slot.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a radio frequency identification anti-metal tag 300 applied to metal, including: a housing 10 and a tag 20, wherein the housing 10 is used for installing and accommodating the tag 20, and the housing 10 is used for installing on metal.
Specifically, the housing 10 is made of ABS plastic, and when the rfid tag 300 is mounted on a metal, the plastic housing 10 can reduce interference of the metal to the radio frequency signal and enhance the protection level of the tag.
Referring to fig. 2, the housing 10 includes an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 are assembled to form the housing 10, the housing 10 is used for installing and accommodating the tag 20, and the housing 10 is used for being installed on metal to prevent the metal from interfering with the rf signal when reading the information in the tag 20.
In the present embodiment, the front side is a side directly viewed from the lower case 12, and the length and width of the housing 10 are 67mmx18mm, and the length and width of the housing 10 are preferably 66mmx17mm due to an error in the process of processing.
The upper shell 11 is substantially in a shape of a Chinese character 'ao', and is provided with an accommodating cavity 111 and a groove 112, the accommodating cavity 111 and the groove 112 both extend from a surface of the upper shell 11, which is assembled with the lower shell 12, toward an opposite surface, wherein the accommodating cavity 111 is used for accommodating and mounting the tag 20, the groove 112 is used for being assembled with the lower shell 12 and communicated with the accommodating cavity 111, and the cross-sectional dimension of the groove is larger than that of the accommodating cavity, so that a step surface is formed at a boundary between the groove wall of the groove and the wall of the accommodating cavity.
Two columns 113 extend into the accommodating cavity 111, the two columns 113 are respectively located at two sides of the accommodating cavity 111, the upper shell 11 is further provided with two first mounting holes 114, each first mounting hole 114 and the column 113 at each side are located at opposite positions, and each first mounting hole 114 is a through hole and is used for being assembled with the lower shell 12.
Optionally, a blocking wall (not labeled) extends into the accommodating cavity 111, and the blocking wall and two side surfaces of the upper shell 11 jointly enclose a cavity for accommodating and mounting the label 20, so as to further limit the label 20.
Optionally, a supporting wall (not shown) extends inside the receiving cavity 111, and the supporting wall is used for supporting the label 20 and reinforcing the upper shell.
The lower shell 12 is used for sealing the accommodating cavity 111 and limiting the position of the tag 20 together, a second mounting hole 124 is formed in the position, opposite to the first mounting hole 114, of the lower shell 12, the second mounting hole 124 is also a through hole, when the lower shell 12 and the groove 112 are assembled, the lower shell 12 abuts against a step surface, and then the first mounting hole 114 and the second mounting hole 124 are assembled through screws.
In this embodiment, the housing 10 further includes screws (not shown), the upper case 11 and the lower case 12 are fixed by the screws, and the screws are assembled through the first mounting holes 114 and the second mounting holes 124 to fix the upper case 11 and the lower case 12, so as to provide waterproof, dustproof, acid-proof, alkali-proof, and anti-collision functions for the rfid anti-metal tag 300, increase the service range of the rfid anti-metal tag 300, and prolong the service life of the rfid anti-metal tag 300.
Alternatively, after the label 20 is mounted in the receiving cavity 111, the upper case 11 and the lower case 12 may be fixed to each other by ultrasonic welding.
In other embodiments, the housing 10 includes a sealing member, a sealing groove for installing the sealing member is disposed on the upper casing 11, when installing, a sealing ring is installed in the sealing groove, the lower casing 12 is installed in the groove 112, and the first installation hole 114 and the second installation hole 124 are assembled by screws to seal the accommodation cavity 111.
Optionally, the mounting and fixing manner between the upper shell 11 and the lower shell 12 is not limited in the present invention.
Referring to fig. 3 and 4, the tag 20 includes an antenna 21, a dielectric layer 22, a chip (not shown), and a plastic layer (not shown), wherein the plastic layer wraps the antenna 21, the dielectric layer 22, and the chip, and the antenna 21 and the chip are both located between the dielectric layer 22 and the plastic layer.
The dielectric layer 22 may be made of an engineered plastic, and the dielectric layer 22 is a substantially flat rectangular parallelepiped having opposite major surfaces and side surfaces between the major surfaces.
In an electronic tag system, information is stored in the chip in the tag 20, the information in the tag is read by a reader, the transmission of signals between the tag and the reader is realized by the electromagnetic field inductive coupling principle, when the reader reads the information in the tag 20, an electromagnetic field is emitted, the antenna 21 in the tag 20 induces a magnetic field and absorbs a part of energy to react to the electromagnetic field, and the transmission of signals between the chip and the reader is realized by the antenna in the interaction process with the magnetic field, so that the information in the chip is written in and read out.
Specifically, the antenna 21 has a substantially planar structure, the antenna 21 includes a radiation unit 211, a ground unit 212, and a connection unit 213, the radiation unit 211 and the ground unit 212 are both connected to the connection unit 213, and the radiation unit 211 and the ground unit 212 are respectively located on two sides of the connection unit 213. The radiation unit 211 and the grounding unit 212 are respectively attached to two opposite main surfaces of the dielectric layer 22, and the connection unit 213 is attached to a side surface of the dielectric layer 22, so that the antenna 21 forms a multi-layer structure to form a microstrip antenna structure.
The radiation unit 211 is used to radiate or receive radio waves, the ground unit 212 is used to be grounded, and the connection unit 213 is used to be connected to the chip.
In practical application, the radiation unit 211, the ground unit 212 and the connection unit 213 are attached to the outer surface of the dielectric layer 22, specifically, the radiation unit 211 and the ground unit 212 are respectively attached to two main surfaces of the upper back of the dielectric layer 22, and the connection unit 213 is attached to one side surface of the dielectric layer 22, so that the radiation unit 211 and the ground unit 212 are both bent relative to the connection unit 213, so that the radiation unit 211 and the ground unit 212 are both perpendicular to the connection unit 213, and the radiation unit 211 and the ground unit 212 are parallel to each other.
Further, the antenna 21 is an unfolded and bent dipole antenna, the radiation unit 211 and the ground unit 212 can be respectively used as two side arms of the whole structure, and the middle is the dielectric layer 22, so that a simple microstrip antenna structure is formed among the radiation unit 211, the ground unit 212 and the dielectric layer 22.
After the antenna 21 is unfolded, the size of the antenna 21 is 82mmx13mm, the whole size is small, and the antenna 21 is attached to the outer surface of the dielectric layer 22 and is of a bent structure, so that the size of the antenna 21 and the dielectric layer 22 is smaller, and the occupied space is small.
Further, the radiation unit 211 is formed by an antenna, specifically, an etched antenna, and the whole antenna is surrounded to be rectangular and provided with a notch shape, so that the whole radiation unit 211 is curved, three strip notches are provided on the radiation unit 211, the three notches are respectively set as a first notch 2111, a second notch 2112, and a third notch 2113, the first notch 2111, the second notch 2112, and the third notch 2113 are all U-shaped, and the first notch 2111, the second notch 2112, and the third notch 2113 are parallel to each other.
The openings of the first notch 2111 and the third notch 2113 are located on the same side of the radiation unit 211, and the opening of the second notch 2112 and the opening of the first notch 2111 are located on different sides of the radiation unit 211, so that the entire radiation unit 211 is bent in a serpentine shape.
In this embodiment, will keep away from on the radiating element 211 one side of connecting element 213 is as the reference line, then first scarce groove 2111 distance the distance of reference line is 11mm, and the width of groove is 1mm, and the degree of depth of groove is 10mm, second scarce groove 2112 distance first scarce groove 2111's distance is 5mm, and the width of groove is 1mm, and the degree of depth of groove is 10mm, third scarce groove 2113 distance the distance of second scarce groove 2112 is 5mm, and the width of groove is 1mm, and the degree of depth of groove is 9 mm.
The grounding unit 212 is also obtained by an antenna, specifically an etched antenna, and has a rectangular overall shape and the same size as the radiating unit 211, but the grounding unit 212 is not provided with a notch.
Optionally, the connection unit 213 includes two connection lines (not shown) separated from each other, the two connection lines are respectively connected to the radiation unit 211 and the ground unit 212, and the two connection lines are parallel to each other, the connection unit 213 is provided with a feeding point (not shown), the feeding point is disposed in the middle of the connection unit 213, the feeding point is used for connecting to the chip, and the position of the feeding point determines the position of the chip.
In the present embodiment, the line width of the connection unit 213 is 1mm, and the line length is 3.5 mm.
The dielectric layer 22 is substantially rectangular and made of engineering plastic, and the dielectric constant of the dielectric layer 22 is different from that of the dielectric layer 22, so that the loss generated in the working process is different from that of the dielectric layer, and the influence on the performance of the whole tag 20 is also different.
The chip is used for storing information related to metal to which the tag 20 is attached, and is connected to the feeding point of the connection unit 213.
Further, a first annular matching network is formed among the radiation unit 211, the two connection lines, and the ground unit 212, the radiation unit 211 forms a second matching network, and both the first matching network and the second matching network are used for adjusting the impedance of the antenna 21, when the impedance of the antenna 21 and the impedance of the chip reach impedance conjugation, the impedance matching degree between the antenna 21 and the chip is high, and the readable strength of the whole tag 20 is strong.
It is understood that the first 2111, second 2112 and third 2113 slots of the radiation unit 211 are designed such that the entire radiation unit 211 assumes a curved configuration, and the slot sizes of the first 2111, second 2112 and third 2113 slots have an influence on the impedance matching.
In this embodiment, the radiating element 211 and the grounding element 212 correspond to two tuning elements of the antenna, and the tuning elements are used for transmitting and receiving electromagnetic wave signals.
In this embodiment, the design of the overall shape of the antenna 21 and the design of the relative positions of the chip and the antenna 21 may enable the input impedance of the antenna 21 and the impedance of the chip to be matched in a conjugate manner, so that the best impedance matching between the antenna 21 and the chip is achieved, the transmission power between the antenna 21 and the chip is maximized, and further the readable strength of the tag 20 is maximized.
The information in the chip is obtained by reading through a corresponding reader, the chip is connected with the antenna 21, the antenna 21 is connected with the reader in a wireless connection mode, and the information in the tag 20 is obtained by analyzing and decoding electromagnetic wave information to realize the interaction between the information.
In this embodiment, the chip preferably adopts a chip conforming to IS0/IEC 18000-6C EPC Class 1 Gen 2 Monza R6, and the chip has the characteristics of high read-write sensitivity, high write-in speed and high encoding speed. Of course, the chip may be of other models.
The plastic layer parcel antenna 21, chip with dielectric layer 22, to inside antenna 21 with the effect that the chip played the protection, be equipped with on the one side of plastic layer and paste the coating, through paste the coating, label 20 can directly paste and use on metal or other article.
In this embodiment, the tag 20 is accommodated and mounted in the upper case 11, and the upper case 11 and the lower case 12 are fixed.
In the technical solution of the present application, the rfid anti-metal tag 300 includes: the shell 10 and the tag 20 are applied to metal, the tag 20 is accommodated in the shell 10, the influence of metal on radio frequency signals can be avoided, the functional property of the tag 20 is ensured, the functions of water resistance, dust resistance, acid resistance, alkali resistance and collision resistance can be achieved, and the service life of the tag 20 is prolonged.
Further, the tag 20 includes an antenna 21, a dielectric layer 22 and a chip, the dielectric layer 22 is substantially rectangular, the antenna 21 is attached to an outer surface of the dielectric layer 22, the antenna includes a radiation unit 211, a ground unit 212 and a connection unit 213, the radiation unit 211 and the ground unit 212 are respectively connected to the connection unit 213 and respectively located at two sides of the connection unit 213, the radiation unit 211 and the ground unit 213 are both formed by surrounding the antenna, wherein the radiation unit 211 is substantially rectangular and is provided with a first notch 2111, a second notch 2112 and a third notch 2113 during surrounding manufacture, the first notch 2111, the second notch 2112 and the third notch 2113 are U-shaped and parallel to each other, wherein openings of the first notch 2111 and the third notch 2113 are located at the same side, and an opening of the second notch 2112 is located at the same side as an opening direction of the first notch 2111 and the third notch 2113 The opposite side makes the whole radiation unit 211 present a curve, the ground unit 212 is substantially rectangular and has no notch, the feeding point of the connection unit 213 is located in the middle and connected to the chip, the overall shape structure of the antenna 21 is designed, and the relative positions of the chip and the antenna 21 are designed, so that the impedance of the antenna 21 and the impedance between the chips are matched in conjugate, so that the best impedance matching between the antenna 21 and the chips is achieved, the transmission power between the antenna 21 and the chips is maximized, and further the readable strength of the tag 20 is maximized.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A radio frequency identification metal-resistant tag for mounting on metal, the radio frequency identification metal-resistant tag comprising:
the non-metal shell is arranged on the metal and is provided with an accommodating cavity;
the tag is accommodated in the accommodating cavity and comprises an antenna, the antenna is of a dipole structure and comprises a radiation unit, a grounding unit and a connection unit, wherein the radiation unit is opposite to the grounding unit, and the connection unit is connected with the radiation unit and the grounding unit.
2. The radio frequency identification metal-resistant tag of claim 1, wherein the housing comprises an upper shell and a lower shell;
the accommodating cavity is formed in the upper shell, the antenna is accommodated in the accommodating cavity, and the upper shell and the lower shell are assembled to seal the accommodating cavity.
3. The radio frequency identification metal-resistant tag of claim 2,
the upper shell is also provided with a groove for being assembled with the lower shell, the groove is communicated with the accommodating cavity, and the size of the cross section of the groove is larger than that of the cross section of the accommodating cavity;
the lower shell is embedded into the groove, and the upper shell and the lower shell are fixed in an ultrasonic welding mode.
4. The radio frequency identification metal-resistant tag of claim 2,
the upper shell is provided with a first mounting hole;
a second mounting hole is formed in the position, opposite to the first mounting hole, of the lower shell;
the shell further comprises a screw, and the screw penetrates through the first mounting hole and then is assembled with the second mounting hole to fix the upper shell and the lower shell.
5. The radio frequency identification metal-resistant tag of claim 1,
the radiating unit and the grounding unit are both formed by etching antennas and are rectangular, wherein the radiating unit is provided with a notch.
6. The radio frequency identification metal-resistant tag of claim 5,
the notches comprise a first notch, a second notch and a third notch;
the radiation unit is provided with a first notch, a second notch and a third notch, wherein the first notch, the second notch and the third notch are all U-shaped grooves, the opening directions of the first notch and the third notch are the same, the opening direction of the second notch is opposite to the opening directions of the first notch and the third notch, and the radiation unit is made to be of a snake-shaped bending structure due to the arrangement of the first notch, the second notch and the third notch.
7. The radio frequency identification metal-resistant tag of claim 6, wherein the connecting unit comprises two connecting lines, the two connecting lines are parallel to each other, and each connecting line connects the radiating unit and the grounding unit.
8. The radio frequency identification metal-resistant tag of claim 7,
the tag further comprises a chip;
a first matching network is formed among the radiation unit, the grounding unit and the two connecting lines, and a second matching network is formed among the radiation unit;
the chip is connected with the connecting unit and is positioned in the middle of the radiating unit and the grounding unit, and the first matching network and the second matching network are used for adjusting the impedance matching degree between the antenna and the chip.
9. The radio frequency identification metal-resistant tag of claim 8,
the label also comprises a dielectric layer, and the material of the dielectric layer is engineering plastic;
the dielectric layer is provided with two opposite main surfaces and a side surface positioned between the two main surfaces;
the radiation unit and the grounding unit are respectively attached to the two main surfaces of the dielectric layer, which are opposite to each other, and the connecting unit is attached to the side surface.
10. The radio frequency identification metal-resistant tag of claim 9, wherein the tag further comprises a plastic layer;
the plastic layer wraps the antenna, the chip and the dielectric layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823053.1U CN209842682U (en) | 2019-05-31 | 2019-05-31 | Radio frequency identification anti-metal tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823053.1U CN209842682U (en) | 2019-05-31 | 2019-05-31 | Radio frequency identification anti-metal tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209842682U true CN209842682U (en) | 2019-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920823053.1U Active CN209842682U (en) | 2019-05-31 | 2019-05-31 | Radio frequency identification anti-metal tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209842682U (en) |
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2019
- 2019-05-31 CN CN201920823053.1U patent/CN209842682U/en active Active
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