JP2006126901A - Tag and rfid system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-purpose tag so composed as to be used for a plurality of purposes by suppressing a mutual interference, and an RFID system equipped with the multi-purpose tag. <P>SOLUTION: The multi-purpose tag 2 is formed by fixing a second tag 2b of a film type or the like, sandwiching a conductive member 10 and a soft magnetic member 11, or sandwiching a soft magnetic member 12, a conductive member 10, and a soft magnetic member 11, in a place overriding a part enclosed by an antenna coil 3a of a first tag 2a on a front face or a back face of the existing first tag 2a. A mutual interference by the first tag 2a and the second tag 2b is suppressed by the conductive member 10, and a magnetic flux which is generated in the second tag 2b is led to the side face of the soft magnetic member 11 by the soft magnetic member 11 for suppressing the loss by the conductive member 10. By this arrangement, both the first tag 2a and the second tag 2b can function even in the state that they are close to each other, making an integrated multi-purpose tag 2 usable for a plurality of purposes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tag used in an RFID (Radio Frequency Identification) system and an RFID system including the tag, and more particularly to a multipurpose tag capable of communicating with a plurality of readers or reader / writers and an RFID system including the multipurpose tag. About.

  In recent years, RFID systems that perform data communication between a tag including an IC chip and a reader or a reader / writer have become widespread. Since the RFID system performs data communication using an antenna provided in each of the tag and the reader or reader / writer, communication is possible even if the tag is separated from the reader or reader / writer by several centimeters to several tens of centimeters. In addition, it has come to be used in various fields such as entrance / exit management due to its strength against dirt and static electricity.

  For example, Japanese Patent Laid-Open No. 15-213998 proposes an entrance / exit management system including an entrance / exit direction detection sensor that outputs different detection signals depending on whether an individual is entering or leaving the room.

Japanese Patent Laid-Open No. 15-213998 (page 3-5, FIG. 1)

  When a company introduces an entrance / exit management system using an RFID system, a reader or reader / writer may be installed at the entrance of the company to control the opening and closing of gates and doors. For example, multiple companies in a building If there is a resident, anyone can enter and exit the common area simply by introducing an entrance / exit management system at each company's doorway. Access was restricted.

  However, it is desirable to introduce an entrance / exit management system using an RFID system at the entrance / exit of a building because the method of allocating guards requires enormous labor costs, but each company's entrance / exit management system is usually unique. Therefore, in order to integrate the entrance / exit management system of the entire building and the entrance / exit management system of each company, it is necessary to unify the security method. It must be constructed, and it puts a heavy burden on the administrator.

  As another method, there is a method of creating a tag used for the entrance / exit management system of the entire building, separately from the tag used for the entrance / exit management system of each company. For example, if a tag embedded in an ID card is used as the entrance / exit management system of each company, a card-type tag etc. will be created as an entrance / exit management system for the entire building, apart from the ID tag. Thus, this method is inconvenient for the user because it must possess two types of tags.

  As another method, a tag (for example, a film-type tag) used for an entrance / exit management system for the entire building is pasted on a tag (for example, an ID tag) used for each company's entrance / exit management system. A method is also possible, but in that case, the antenna of the tag used for the entrance / exit management system of each company interferes with the antenna of the tag used for the entrance / exit management system of the entire building, and the communication distance is shortened. Communication failure will occur.

  The present invention has been made in view of the above problems, and a main purpose thereof is a multi-use tag configured to suppress mutual interference and to be used for a plurality of uses, and an RFID including the multi-use tag. To provide a system.

  In order to achieve the above object, a tag of the present invention is a tag used in an RFID system that communicates data in a contactless manner, and the tag includes at least a first tag and a first tag. Consists of a second tag that is fixed by sandwiching a conductive member and a soft magnetic member in this order at a position that overlaps a part of the region surrounded by the antenna coil that constitutes the first tag on the front surface or the back surface. It is what is done.

  The tag of the present invention is a tag used in an RFID system that performs data communication without contact, and the tag includes at least a first tag and a front surface or a back surface of the first tag. The second soft magnetic member, the conductive member, and the second soft magnetic member are sandwiched and fixed in this order at a position overlapping with a part of the region surrounded by the antenna coil constituting the first tag. It is comprised with the tag.

  The RFID system of the present invention is an RFID system including a first reader, a first tag, a second reader, and a second tag that perform contactless data communication, wherein the second tag Is fixed to the front or back surface of the first tag at a position overlapping a part of the region surrounded by the antenna coil constituting the first tag with the conductive member and the soft magnetic member sandwiched in this order. The first tag, the conductive member, the soft magnetic member, and the second tag form an integrated tag.

  The RFID system of the present invention is an RFID system including a first reader, a first tag, a second reader, and a second tag that perform contactless data communication, wherein the second tag The first soft magnetic member, the conductive member, and the second soft member are positioned on the front surface or the back surface of the first tag so as to overlap with a part of the region surrounded by the antenna coil constituting the first tag. The first tag, the first soft magnetic member, the conductive member, the second soft magnetic member, and the second tag form an integrated tag that is fixed with a magnetic member interposed therebetween. It is what.

  In the present invention, the first tag may be an existing tag, and the second tag may be a tag created based on the first tag.

  In the present invention, the first tag may be a card-like tag, and the second tag may be a film-like tag.

  In the present invention, one of the first tag and the second tag is a tag used for entrance / exit management of a building, and the other of the first tag and the second tag is in the building. It can also be a tag used for entrance / exit management of a tenant.

  Thus, in the present invention, the mutual interference between the antenna of the first tag and the antenna of the second tag is suppressed by the conductive member, and the second tag (or the first tag and the first tag and the antenna) is suppressed by the soft magnetic member. Intrusion of magnetic flux generated by the antenna of the second tag) into the conductive member is suppressed. As a result, without changing the existing first tag, it is only necessary to fix the second tag with at least the conductive member and the soft magnetic member sandwiched between them. Tags that can be used for multiple purposes such as management can be provided.

  According to the tag of the present invention and the RFID system including the tag, a tag that can be used in a plurality of RFID systems can be provided.

  The reason is that the integrated tag is formed by fixing the second tag on the front or back surface of the existing first tag with at least the conductive member and the soft magnetic member interposed therebetween. This is because mutual interference between the antenna of the first tag and the antenna of the second tag is suppressed, and entry of magnetic flux generated by the antenna of the second tag into the conductive member is suppressed by the soft magnetic member. .

  In a preferred embodiment of the versatile tag according to the present invention, the first tag is located at a position overlapping the part of the area surrounded by the antenna coil of the first tag on the front surface or the back surface of the existing first tag. From the tag side, a second tag such as a film type is fixed by sandwiching a conductive member and a soft magnetic member, or a soft magnetic member, a conductive member, and a soft magnetic member. Interaction between the antenna of the first tag and the antenna of the second tag is suppressed, and magnetic flux generated by the antenna of the second tag (or the first tag and the second tag) is generated by the soft magnetic member. It can guide to the side of a soft magnetic member and can control loss by a conductive member. As a result, each tag can function even when the first tag and the second tag are close to each other, and the integrated tag can be used for a plurality of buildings such as entrance / exit management of the entire building and entrance / exit management of each tenant. It can be made available for use.

  In order to describe the above-described embodiment of the present invention in more detail, a tag and an RFID system according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram schematically showing the configuration of the entrance / exit management system of the present invention, and FIG. 2 is a diagram showing the configuration of the RFID system. FIG. 3 is a perspective view schematically showing the configuration of the multipurpose tag of the present embodiment. FIG. 4 is a top view showing the structure, a cross-sectional view taken along the line AA ′, and a partially enlarged view thereof. is there. FIGS. 6 and 8 to 10 are diagrams showing variations in the structure of the multipurpose tag of this embodiment. FIGS. 5 and 7 schematically show the magnetic flux distribution of the multipurpose tag of this embodiment. FIG. FIG. 11 is a flowchart showing an entrance / exit management method using the multipurpose tag of this embodiment.

  As shown in FIG. 1, the entrance / exit management system 1 of the present embodiment includes a first RFID system 1a used for a first application (for example, entrance / exit management of each tenant) and a second application (for example, The first RFID system 1 is used for the entrance / exit management of the entire building). The first RFID system 1 is a first reader / writer 6a (for example, wall-mounted) installed near the entrance of each tenant. Type reader / writer) and the first tag 2a formed on the multipurpose tag 2, and the second RFID system 1b is a second reader / writer 6b (for example, installed near the entrance of the building) , A flap gate integrated reader / writer, a wall-mounted reader / writer, and the like) and a second tag 2b fixed to the multipurpose tag 2. In addition, although the present Example shows about the case where the multipurpose tag 2 is comprised by two tags, the 1st tag 2a and the 2nd tag 2b, the multipurpose tag 2 may be comprised by three or more tags. . Further, the reader / writer in the present embodiment includes a reader alone, and the installation form is arbitrary. In addition, the communication frequency (for example, 13.56 MHz, 2.45 GHz, etc.) of the RFID system is not particularly limited, and the communication mode (proximity type, close contact type, proximity type, etc.) between the tag and the reader / writer is not particularly limited.

  Further, the basic configuration of each RFID system is as shown in FIG. 2, and the tag (first tag 2a or second tag 2b) includes an antenna coil 3 and a capacitor (IC 5 having a capacity of the resonance circuit 4). And the IC 5 that stores ID information and the like as necessary. The reader / writer (the first reader / writer 6a or the second reader / writer 6b) is a tag. Reader / writer antenna 7 that communicates with the communication device, communication circuit unit 8 for converting transmission / reception signals, and arithmetic processing unit 9 for decoding transmission / reception signals.

  Further, as shown in the perspective view of FIG. 3, the top view of FIG. 4, the cross-sectional view taken along the line AA ′ and the partial enlarged view thereof, The first tag 2a formed in advance, and the conductive member 10 and the predetermined material made of a predetermined material, a metal foil or a metal plate at a predetermined position on the front surface or the back surface of the first tag 2a, The second tag 2b is fixed with a thickness and a soft magnetic member 11 (synonymous with a high permeability member) formed by a manufacturing method. The first tag 2a is configured, for example, in which a spiral antenna coil 3a is formed on a plastic plate as a base material, both ends of the antenna coil 3a are connected to the IC 5a, and these are covered with a protective film. ing. The second tag 2a is formed in a size smaller than at least the first tag 2a. For example, a spiral antenna coil 3b is formed on a plastic film, and both ends of the antenna coil 3b are connected to the IC 5b. These are configured to be covered with a protective film.

  Here, when the second tag 2b is directly fixed on the first tag 2a without interposing the conductive member 10 and the soft magnetic member 11, the antenna coil 3a of the first tag 2a and the second tag Although a communication failure such as a decrease in communication distance due to interference with the antenna coil 3b of 2b occurs, in this embodiment, as shown in FIG. 5, the antenna coil of the first tag 2a The magnetic flux 13a generated in 3a passes through the portion other than the conductive member 10 inside the antenna coil 3a, and the magnetic flux 13b generated in the antenna coil 3b of the second tag 2b passes through the inside of the soft magnetic member 11 Since the light is guided from the side to the outside, interference between the first tag 2a and the second tag 2b can be suppressed, and one versatile tag 2 can be used in two RFID systems.

  In FIG. 4, the antenna coil 3a of the first tag 2a and the antenna coil 3b of the second tag 2b are both wound with a rectangular conductor pattern twice, but the size and shape of the antenna coil The number of windings, the line width, the forming method, and the like are arbitrary, and the size, shape, and mounting position of the IC 5 are also arbitrary. In FIG. 4, in order to make the positional relationship between the second tag 2b, the conductive member 10, and the soft magnetic member 11 easy to understand, the conductive member 10 is larger than the second tag 2b, and the soft magnetic member 11 is electrically conductive. The conductive member 10 and the soft magnetic member 11 may be larger than the outer diameter of the antenna coil 3b of the second tag 2b. Moreover, the fixing method of the 2nd tag 2b, the electroconductive member 10, and the soft-magnetic member 11 is arbitrary, For example, it is good also as a structure affixed using an adhesive agent or an adhesive material, and on the 1st tag 2a. It is good also as a structure which arrange | positions the 2nd tag 2b on both sides of the electroconductive member 10 and the soft-magnetic member 11, and adheres these and adheres them with a laminate film etc.

  Moreover, although the material, thickness, manufacturing method, etc. of the electroconductive member 10 inserted between the 1st tag 2a and the 2nd tag 2b are arbitrary, the 1st tag 2a and the 2nd tag 2b In order to effectively suppress the mutual interference between them, it is preferable that the electric resistance is small. For example, a metal foil or a metal plate such as aluminum, copper, or a copper alloy can be used.

  Further, the material, thickness, manufacturing method, and the like of the soft magnetic member 11 inserted between the first tag 2a and the second tag 2b are arbitrary. For example, amorphous foil, amorphous foil laminate, metal Powder, Carbonyl iron powder, Reduced iron powder, Atomized powder (Pure iron, Iron containing Si, Cr, Al, etc., Permalloy, Co-Fe powder, etc.), Amorphous (B, P, Si containing iron, Cobalt, It can be formed by a granular powder such as a powder obtained by water atomization or gas atomization of a nickel alloy) or a composite material of a flake and an organic substance such as plastic or rubber, or a coating film of a paint containing the powder or flake. As this composite material, a thermoplastic plastic with good processability can be used, or a thermosetting plastic with good heat resistance can be used. Insulating acrylic, polyester, polyvinyl chloride, polyethylene Resins such as polystyrene and epoxy can also be used.

  Moreover, injection molding, application | coating, compression molding, rolling, etc. can be used as a method of manufacturing the said composite material. In the case of coating, for example, the granular powder can be flattened with an attractor, ball mill, stamp mill or the like to form flakes, and then a coating containing flakes or granular powder can be repeatedly applied / dried on the film. In that case, since the flakes can be oriented in a certain direction by applying a magnetic field during coating, the influence of the conductive member 10 can be suppressed.

  The above configuration is the basic configuration of the multipurpose tag 2 of the present embodiment. Hereinafter, variations of the configuration of the multipurpose tag 2 will be described.

  In FIG. 4, the conductive member 10 and the soft magnetic member 11 are arranged in this order on the first tag 2a, and the second tag 2b is arranged thereon, but the antenna coil of the first tag 2a is arranged. When the magnetic flux 13a generated in 3a enters the conductive member 10, an eddy current that cancels out the magnetic flux 13a flows in the conductive member 10 and a problem such as a decrease in inductance may occur. Therefore, when the size of the conductive member 10 is large (that is, when the size of the second tag 2b is large), in order to suppress loss due to eddy current, a top view of FIG. 6 and a cross section taken along line BB ′. As shown in the figure and its partially enlarged view, a soft magnetic member 12 is further inserted between the first tag 2a and the conductive member 10, and the soft magnetic member 11 / conductive member 10 / soft magnetic member 12 are inserted. The three-layer structure can also be used. With such a configuration, as shown in FIG. 7, the magnetic flux 13 a generated in the direction of the conductive material 10 out of the magnetic flux 13 a generated in the antenna coil 3 of the first tag 2 a passes through the soft magnetic member 12. Since it is led to the outside through the side surface, loss due to eddy current generated in the conductive member 10 can be reduced.

  3 to 7 show the case where the second tag 2b is fixed inside the region surrounded by the antenna coil 3a of the first tag 2a. However, the first tag 2a and the second tag 2b are shown. Is not limited to the configuration shown in the figure, and any positional relationship where the antenna coils of both tags interfere with each other, for example, as shown in FIG. 8, surrounded by the antenna coil 3a of the first tag 2a. You may fix the 2nd tag 2b so that a part of area | region and a part of area | region enclosed by the antenna coil 3b of the 2nd tag 2b may overlap.

  3 to 8, the multi-purpose tag 2 is composed of two tags, the first tag 2a and the second tag 2b. However, the multi-use tag 2 of the present invention may be composed of a plurality of tags. For example, as shown in FIG. 9, a plurality of tags (here, at least a conductive material 10 and a soft magnetic material 11 are sandwiched between a part of a region surrounded by the antenna coil 3a of the first tag 2a. Then, it can also be set as the structure which fixes 2nd of the 2nd tag 2b and the 3rd tag 2c). In this case, the second tag 2b can be fixed to the front side of the first tag 2a, and the third tag 2c can be fixed to the back side of the first tag 2a.

  3 to 9, the multipurpose tag 2 is a card-type tag. However, the shape of the multipurpose tag 2 is not limited to the configuration shown in the figure, and is at least a plane parallel to the antenna surface of the first tag 2a. For example, as shown in FIG. 10, the multipurpose tag 2 can be a stick-shaped tag or the like.

  Next, a procedure for managing entrance / exit at a plurality of locations using the multipurpose tag 2 having the above-described configuration will be described with reference to the flowchart of FIG. In the following, the case of managing the entrance / exit of a building and the entrance / exit of a tenant using the multi-use tag 2 of the present embodiment will be described. However, these uses are examples, and are applied to a plurality of arbitrary uses. be able to.

  First, in step S101, the user of the building holds the multi-use tag 2 over the reader / writer antenna 7 of the second reader / writer 6b such as a flap gate integrated type installed at the entrance of the building. Then, in step S102, the second reader / writer 6b communicates with the second tag 2b in the multipurpose tag 2, and in step S103, the ID information stored in the IC 5b of the second tag 2b is referred to. Then, it is determined whether the second tag 2b is a regular tag registered in advance.

  If it is determined that the tag is a legitimate tag, the second reader / writer 6b opens the gate flap to allow the user to enter in step S104. If the tag is not legitimate, the second reader / writer 6b is determined to be a legitimate tag in step S109. The writer 6b keeps the gate flap closed and prohibits the user from entering.

  Here, in the case of the conventional entrance / exit management system, in addition to the tenant entrance / exit tags, it is inconvenient to have a building entrance / exit tag, and new entrance / exit management is required. When constructing a system, the security method must be unified, and there is a problem that a great burden is placed on the building or tenant administrator. Also, in the configuration in which the second tag 2b is simply fixed to the first tag 2a. Although the antenna coil 3a of the first tag 2a and the antenna coil 3b of the second tag 2b interfere with each other to cause a communication failure, in the present embodiment, there is an existing tenant entry / exit Since it is only necessary to fix the second tag 2b for entering and leaving the building by sandwiching at least the conductive member 10 and the soft magnetic member 11 between the first tag 2a, the convenience of the user is improved. Let , To reduce the burden on the administrator of the building and the tenant, it can be managed reliably entrance and exit.

  Next, in step S105, the user holds the multi-use tag 2 over the reader / writer antenna 7 of the first reader / writer 6a such as a wall-mounted type installed at the entrance of each tenant. Then, in step S106, the first reader / writer 6a communicates with the first tag 2a in the multipurpose tag 2, and in step S107, the ID information stored in the IC 5a of the first tag 2a is referred to. Then, it is determined whether the first tag 2a is a regular tag registered in advance.

  If it is determined that the tag is a legitimate tag, in step S108, the first reader / writer 6a unlocks the door of each tenant and allows the user to enter. If it is determined that the tag is not a legitimate tag, the first reader / writer 6a The first reader / writer 6a prohibits the entry of the user while keeping the door of each tenant's doorway locked.

  Also here, since the first tag 2a and the second tag 2a are integrally configured, the convenience of the user can be improved, and the existing first tag 2a is used as it is. Therefore, the burden on the manager of the building or tenant can be reduced. When the size of the second tag 2b is small, there is almost no influence by the conductive member 10, and when the soft magnetic material 12 is disposed between the first tag 2a and the conductive material 10, the conductive property is reduced. The influence of the material 10 can be reliably suppressed.

  After that, when exiting from each tenant or building in step S110, similarly, hold the multi-use tag 2 over the first reader / writer 6a or the second reader / writer 6b to unlock the door or flap the gate. Open and leave. When exit is not managed, the user may be detected by detecting the user with an infrared sensor or the like and automatically unlocking the door or opening the gate flap.

  In this way, at least the conductive member 10 and the soft magnetic member 11 are sandwiched between the front surface or the back surface of the first tag 2a so as to overlap a part of the region surrounded by the antenna coil 3a of the first tag 2a. Since the multi-purpose tag 2 is formed by fixing the second tag 2b, the mutual interference between the antenna coils of the respective tags is suppressed, and the first reader / writer 6a and the second reader / writer 6b. Communication with both parties becomes possible. Thus, for example, by forming the multi-use tag 2 using the existing first tag 2a for tenant entrance / exit management and the new second tag 2b for building entrance / exit management, 1 One multi-use tag 2 can be used for a plurality of uses such as tenant entrance / exit management and building entrance / exit management.

  In the above embodiment, an existing tag is used as the first tag 2a in order to be compatible with an existing system. However, the present invention is not limited to the above embodiment, and a new system is constructed. When doing, it is good also as a structure which creates the new multipurpose tag 2 with which the 1st tag 2a and the 2nd tag 2b were integrated. In the above embodiment, the second tag 2b is fixed to the first tag 2a. However, the second tag 2b is attached to a magnetic card, a contact IC card, a mobile phone having an authentication function, or the like. It is good also as a structure fixed.

It is a figure which shows typically the structure of the entrance / exit management system which concerns on one Example of this invention. It is a figure which shows the structure of an RFID system. It is a perspective view which shows typically the structure of the multipurpose tag which concerns on one Example of this invention. It is the upper side figure and side sectional view which show typically the structure of the multipurpose tag which concerns on one Example of this invention, and a partial enlarged view. It is a figure which shows typically magnetic flux distribution of the multipurpose tag which concerns on one Example of this invention. It is the top view and side sectional view which show typically the other structure of the multipurpose tag which concerns on one Example of this invention, and the elements on larger scale. It is a figure which shows typically magnetic flux distribution of the multipurpose tag which concerns on one Example of this invention. It is a top view which shows typically the other structure of the multipurpose tag which concerns on one Example of this invention. It is a top view which shows typically the other structure of the multipurpose tag which concerns on one Example of this invention. It is a perspective view which shows typically the other structure of the multipurpose tag which concerns on one Example of this invention. It is a flowchart figure which shows the procedure of entrance / exit management using the multipurpose tag which concerns on one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Entrance / exit management system 1a 1st RFID system 1b 2nd RFID system 2 Versatile tag 2a 1st tag 2b 2nd tag 2c 3rd tag 3 Antenna coil 3a 1st antenna coil 3b 2nd antenna Coil 4 Resonant circuit 5, 5a, 5b IC
6a First reader / writer 6b Second reader / writer 7 Reader / writer antenna 8 Communication circuit unit 9 Arithmetic processing unit 10 Conductive member 11 Soft magnetic member 12 Soft magnetic member 13a First tag magnetic flux 13b Second Tag magnetic flux

Claims (10)

A tag used in an RFID system that communicates data without contact,
The tag includes a conductive member and a soft member at least at a position overlapping a part of a region surrounded by an antenna coil constituting the first tag on the front surface or the back surface of the first tag and the first tag. A tag comprising a second tag fixed with a magnetic member sandwiched in this order. A tag used in an RFID system that communicates data without contact,
The first soft magnetism is located at a position overlapping at least a part of a region surrounded by the first tag and an antenna coil constituting the first tag on the front surface or the back surface of the first tag. A tag comprising: a second tag fixed by sandwiching a member, a conductive member, and a second soft magnetic member in this order.   The tag according to claim 1 or 2, wherein the first tag is an existing tag, and the second tag is a tag created based on the first tag.   The tag according to any one of claims 1 to 3, wherein the first tag is a card-like tag, and the second tag is a film-like tag.   One of the first tag or the second tag is a tag used for building entrance / exit management, and the other of the first tag or the second tag is entrance / exit management of a tenant in the building. The tag according to claim 1, wherein the tag is used for a tag. An RFID system including a first reader and a first tag and a second reader and a second tag that perform data contactless contact,
The second tag has a conductive member and a soft magnetic member placed at a position overlapping a part of the area surrounded by the antenna coil constituting the first tag on the front surface or the back surface of the first tag. Fixed in order,
An RFID system, wherein the first tag, the conductive member, the soft magnetic member, and the second tag form an integral tag. An RFID system including a first reader and a first tag and a second reader and a second tag that perform data contactless contact,
The second tag includes a first soft magnetic member and a conductive member at a position overlapping a part of a region surrounded by an antenna coil constituting the first tag on the front surface or the back surface of the first tag. And the second soft magnetic member are fixed in this order,
An RFID system, wherein the first tag, the first soft magnetic member, the conductive member, the second soft magnetic member, and the second tag form an integral tag. .   The RFID system according to claim 6 or 7, wherein the first tag is an existing tag, and the second tag is a tag created based on the first tag.   The RFID system according to any one of claims 6 to 8, wherein the first tag is a card-like tag, and the second tag is a film-like tag.   One of the first tag or the second tag is a tag used for building entrance / exit management, and the other of the first tag or the second tag is entrance / exit management of a tenant in the building. The RFID system according to claim 6, wherein the RFID system is a tag used in

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