CN101272003A

CN101272003A - Electronic label antenna

Info

Publication number: CN101272003A
Application number: CNA2008100280011A
Authority: CN
Inventors: 栗新; 胡光耀; 高波
Original assignee: GONGCHUANG CO Ltd ZHUHAI CITY
Current assignee: GONGCHUANG CO Ltd ZHUHAI CITY
Priority date: 2008-05-12
Filing date: 2008-05-12
Publication date: 2008-09-24

Abstract

The invention relates to the field of E-tag for object identification, in particular to an antenna on the E-tag. The E-tag antenna couples with a reading head antenna in a reading head device to transmit the identification information signals which are contained by the tag circuit; the E-tag antenna is a coil intertwined with a lead, wherein, the coil is a ring shape. As the invention arranges the tag antenna to be the ring shape, under the circumstances that the position holding axis of the antenna coil of reading head equipment for reading the E-tag is parallel to the axis of the tag antenna and keeps a proper distance, the invention can acquire the readability at any direction of the surrounding 360 degrees of the ring-shaped E-tag antenna; when the reading head equipment is fixed, a ring-shaped E-tag code block is sheathed outside a rod object requiring identification, the rod object can get close to the reader at any position in the surroundings to acquire reliable reading results, thus being able to simplify the rob object structure without circumferential directional location of the rod object.

Description

Electronic label antenna

Technical Field

The invention relates to the field of electronic tags for article identity identification, in particular to an antenna on an electronic tag.

Background

Electronic tags are increasingly widely used due to the characteristics of their unique global identity code values and the adoption of passive schemes, etc., which are extremely convenient implementation modes, and generally include electronic tag antennas and tag circuits, and are classified into two major categories, namely chip electronic tags (such as IC-type electronic tags) and chipless electronic tags (such as SAW radio frequency tags). The mainstream of electronic tag application is a chip electronic tag (IC type electronic tag), most of tag circuits of which have been integrated into an IC to reduce cost, and the passive type (passive type) is most commonly used. SAW radio frequency tags are also receiving increasing attention due to their progressively lower cost and high environmental suitability. Of course, they all share a common feature, with an electronic tag antenna for coupling with the antenna of the reader unit to communicate the identity information signal contained on the tag circuitry.

The IC is directly packaged in a card (such as an identity card) or a small and exquisite sheet or block-shaped protective shell which is convenient to tie or fix after being bound with an antenna coil of an electronic tag, for example, an attendance card of an access control system is directly packaged in the card and integrally becomes a sheet, a common electronic key of the access control is packaged in the sheet to be convenient to tie and use, and the electronic key is also widely used in the field of microcomputer anti-misoperation of an electric power system, generally, the electronic tag is packaged and fixed in a strip-shaped block, and the electronic tag code block can be conveniently fixed on products which need electronic identity recognition, such as various lock bodies.

The electronic tag 2 shown in fig. 1 is composed of a tag antenna 21 and a tag circuit 22, and a practical state is obtained by protecting a package 24, and the reader device 1 is composed of a reader antenna 11 and a reader processing circuit 12. The reader antenna 11 is coupled to the electronic tag antenna 21 to transmit signals.

The existing embodiments of these electronic tags have a common feature: the antenna is wound by itself or together with a solid magnetic core to form a cake shape (as shown in fig. 2), and then together with a tag circuit and packaging to form a sheet-shaped or block-shaped electronic tag code block, wherein the electronic tag code block is attached and fixed on one side of an object needing electronic tag management when being applied. Since the application of the electronic tag actually needs to be read by the reading head arrangement of the system, this has the following consequences for the prior art solutions: when the electronic tag code block is ready to be read, the surface of the electronic tag antenna and an antenna coil of a reading head device of the system are displaced to a short distance in a relative translation motion mode to finish a reading and identifying process. This will undoubtedly cause the structure and usage mode of the objects to be managed by the electronic tag to be limited, which brings about much inconvenience and even safety hazard for some objects. For example, if a rod-like object having an electronic tag code block on its circumferential surface is required, in order to reliably read the rod-like object using the electronic tag code block of the above-described technology, it is necessary to provide a circumferential constraint structure so that the rod-like object is fixed in a certain direction before the electronic tag code block thereon can be read by the reading head device. This brings inconvenience to the use and management of the rod-like articles, and at the same time, the structure of such rod-like articles is not compact enough and the use is not convenient enough.

For example, the temporary grounding wire plug in the field of power line system microcomputer error prevention, the requirement of power station user for modern digital management, requires that each temporary grounding wire is assigned an electronic identity for management, and undoubtedly, passive electronic tags are adopted as the ID codes, which is relatively the best choice, but as the temporary grounding wires, instantaneous large current of dozens or even hundreds of amperes may be generated on the cables when the temporary grounding wires are used.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a ring-shaped electronic tag antenna.

In order to achieve the purpose, the invention provides the following technical scheme:

an electronic tag antenna coupled with a reading head antenna in the reading head device for transmitting an identity information signal contained in the tag circuit; the electronic tag antenna is a coil formed by winding a conducting wire;

wherein,

the coil is annular.

The electronic tag antenna is arranged in a ring shape, so that the electronic tag can be read in any direction of 360 degrees on the circumference of the electronic tag under the condition that the position keeping axis of an antenna coil of a reading head device for reading the electronic tag is parallel to the axis of the electronic tag antenna and keeps a proper distance, and when the reading head device is fixed and the ring-shaped electronic tag antenna is sleeved outside a rod-shaped object needing electronic tag management, the result that the rod-shaped object can be reliably read when approaching a reader at any position in the circumferential direction can be obtained. Therefore, the rod-like objects do not need to be circumferentially positioned, the structure of the rod-like objects can be simplified, and the rod-like objects are convenient to use and store. In addition, the structure of the rod-like object can be more compact.

Drawings

FIG. 1 is a schematic diagram of the construction of an electronic tag and its relationship to a reader device;

FIG. 2 is a simplified diagram of a cake-shaped tag antenna according to the prior art;

FIG. 3 is a schematic perspective view of an electronic tag antenna according to the present invention;

FIG. 4 is an assembled cross-sectional view of the electronic tag antenna of the present invention applied to a rod-shaped article;

FIG. 5 is an assembled cutaway perspective view of the present invention tag antenna nested on a rumble core;

the invention is further explained with reference to the drawings and the embodiments.

Detailed Description

Referring to fig. 3, the electronic tag antenna 111 is used to couple with a reader antenna in a reader device to communicate identity information signals contained on the tag circuitry. The electronic tag antenna 111 is a coil formed by winding a conducting wire; the coil of the electronic tag antenna 111 is spirally wound in a ring shape along the axial direction, and the ring-shaped coil has a hollow portion a.

Referring to fig. 4, which is an application example of the electronic tag antenna according to the present invention, the electronic tag antenna 111 is wound around a rod-shaped object 3 to be managed by an electronic tag in a ring shape, that is, the rod-shaped object 3 passes through a hollow portion a of the electronic tag antenna 111. A tag circuit (not shown) is bound to the electronic tag antenna 111. After the electronic tag antenna 111 is arranged on the rod-shaped object 3, the structure of the rod-shaped object 3 is more compact and simpler; it is important that the rod-like article 3 does not need to be circumferentially positioned, and that the reading of the electronic tag information by the reading head device is not affected regardless of the rotation of the rod-like article 3.

Referring to fig. 5, which is another application example of the electronic tag antenna of the present invention, the tag antenna 111 is wound in a ring shape in the groove of a wheel-shaped magnetic core 4, that is, the magnetic core 4 has a concave region in the middle in the axial direction and has convex regions on both sides, and the concave region of the magnetic core is located inside the hollow portion of the rotating coil. I.e., the magnetic core 4 passes through the hollow portion a of the electronic tag antenna 111. The tag circuit 112 is bound to the coil of the tag antenna 111. When the magnetic core is applied, the rod-shaped object needing electronic tag management can penetrate through the hollow part of the magnetic core, so that the effect shown in the figure 4 can be realized, signals can be enhanced, and the sensitivity of the reading head device can be improved.

In another embodiment of the electronic tag of the present invention, for a rod-like conductive object that needs to pass a strong current, such as a grounding plug of a temporary grounding wire of a power system, a winding direction of an electronic tag antenna is perpendicular to an axis of the rod-like conductive object, according to a relevant rule in the electromagnetic induction principle, a direction of a magnetic field formed when the rod-like conductive object passes a current is parallel to the winding direction of the electronic tag antenna, that is, an electromagnetic field generated by the current in the conductor is zero for a magnetic flux of the electronic tag antenna, and according to lenz's law, the magnetic flux is zero, as a result, an induced current in the coil is zero, that is, the current in the rod-like conductive object has no influence on the electronic tag antenna. Therefore, with this arrangement, even if a strong current is passed, the electronic tag is not damaged, for example, with respect to the earthing plug of the temporary grounding wire.

Of course, the electronic tag antenna of the invention can have other variants. In conclusion, obvious variations are possible in light of the above teachings and other modifications are intended to be included within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. An electronic tag antenna coupled with a reading head antenna in the reading head device for transmitting an identity information signal contained in the tag circuit; the electronic tag antenna is a coil formed by winding a conducting wire;

it is characterized in that the preparation method is characterized in that,

the coil is annular.

2. The electronic tag antenna according to claim 1,

the method is characterized in that:

the hollow part of the annular coil is a penetration area of the rod-shaped object needing electronic tag management.

3. The electronic tag antenna according to claim 1,

the method is characterized in that: also comprises

The hollow part of the annular coil is a penetration area of the columnar hollow magnetic core.

4. The electronic tag antenna according to claim 3,

the method is characterized in that:

the cylindrical hollow magnetic core is in a wheel shape, the middle part of the magnetic core along the axial direction is a sunken area, the two sides of the magnetic core are protruding areas, and the sunken area of the magnetic core is positioned on the inner side of the hollow part of the rotating coil.

5. An electronic label antenna according to any of claims 1-4,

the method is characterized in that:

the coil is annular.

6. An electronic label antenna according to any of claims 1-4,

the method is characterized in that:

the coil is spirally wound along the axial direction.