JP2002183695A - Rfid tag structure and installing structure therefor - Google Patents
Rfid tag structure and installing structure thereforInfo
- Publication number
- JP2002183695A JP2002183695A JP2000383520A JP2000383520A JP2002183695A JP 2002183695 A JP2002183695 A JP 2002183695A JP 2000383520 A JP2000383520 A JP 2000383520A JP 2000383520 A JP2000383520 A JP 2000383520A JP 2002183695 A JP2002183695 A JP 2002183695A
- Authority
- JP
- Japan
- Prior art keywords
- rfid tag
- container
- cylindrical antenna
- rfid
- antenna coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＲＦＩＤ（Radio
Frequency-IDentification）タグ構造体及びその取付構
造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RFID (Radio
Frequency-IDentification) tag structure and its mounting structure.
【０００２】[0002]
【従来の技術】一般にＲＦＩＤタグのアンテナコイル
は、外形のコンパクト性を重視する点から同心円盤状の
アンテナコイルが多用されている。同心円盤状のアンテ
ナコイルでは、該アンテナコイルの中を通る電磁波の変
化により信号や電力の送受信が行われ、同心円盤状のア
ンテナコイルを含む平面がＲＦＩＤタグを取り付ける取
付対象物の表面に平行になるように配置される。2. Description of the Related Art Generally, a concentric disk-shaped antenna coil is frequently used for an antenna coil of an RFID tag in terms of compactness of an outer shape. In a concentric disk-shaped antenna coil, transmission and reception of signals and power are performed by changes in electromagnetic waves passing through the antenna coil, and a plane including the concentric disk-shaped antenna coil is parallel to the surface of the mounting object to which the RFID tag is attached. It is arranged so that it becomes.
【０００３】一方、シリンダ状アンテナコイルをＲＦＩ
Ｄタグに採用することを考えた場合、シリンダ状アンテ
ナコイルでは、磁性体等の棒状コアに導線を巻き付けた
シリンダ状アンテナコイルの中を通る電磁波の変化によ
り信号や電力の送受信が行われる。On the other hand, a cylindrical antenna coil is
In the case of adopting a D tag, in a cylindrical antenna coil, signals and power are transmitted and received by a change in an electromagnetic wave passing through a cylindrical antenna coil in which a conductive wire is wound around a rod-shaped core such as a magnetic material.
【０００４】シリンダ状アンテナコイルでは、その軸方
向に関して磁束の方向性があるため、同心円盤状のアン
テナコイルと同様な方向性で利用しようと考えた場合に
は取付対象物の表面から垂直に細長い取付穴を設け、そ
の取付穴にシリンダ状アンテナコイルの軸方向に沿って
ＲＦＩＤタグを挿入して取り付け、その取付穴の上方か
らリーダライタ端末機等と送受信する方法が一般であ
る。Since the cylindrical antenna coil has a magnetic flux direction with respect to the axial direction, if it is intended to use the same direction as the concentric disk-shaped antenna coil, it is elongated vertically from the surface of the mounting object. In general, a mounting hole is provided, an RFID tag is inserted into the mounting hole along the axial direction of the cylindrical antenna coil, and the RFID tag is mounted on the mounting hole.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前述の
従来例において、ＲＦＩＤタグの取付対象物が渦電流に
より元の磁束を減衰する反対方向の磁束を発生し、ＲＦ
ＩＤタグの通信や電力搬送に影響を及ぼす導電性部材で
あった場合には、取付穴の上方からシリンダ状アンテナ
コイルを有するＲＦＩＤタグとリーダライタ端末機との
間で電磁波を利用して送受信しようとしても電磁波は導
電性部材の影響を受けて大きく減衰し、送受信が困難に
なる。However, in the above-described conventional example, the object to which the RFID tag is attached generates a magnetic flux in the opposite direction to attenuate the original magnetic flux by an eddy current, and the
If the conductive member affects communication and power transfer of the ID tag, use an electromagnetic wave to transmit and receive between the RFID tag having the cylindrical antenna coil and the reader / writer terminal from above the mounting hole. Even so, the electromagnetic wave is greatly attenuated by the influence of the conductive member, making transmission and reception difficult.
【０００６】そこで、本出願人は、シリンダ状アンテナ
コイルを有するＲＦＩＤタグを導電性部材に取り付ける
場合に、該シリンダ状アンテナコイルの軸方向を導電性
部材の取付面に対して平行に配置して設置する方法を提
案し、シリンダ状アンテナコイルを有するＲＦＩＤタグ
を導電性部材に取り付けても漏洩電磁波を利用して該導
電性部材の影響を回避して送受信が可能であることを実
証したものである。[0006] Therefore, when attaching an RFID tag having a cylindrical antenna coil to a conductive member, the present applicant arranges the axial direction of the cylindrical antenna coil parallel to the mounting surface of the conductive member. We proposed a method of installation, and demonstrated that even if an RFID tag having a cylindrical antenna coil was attached to a conductive member, transmission and reception could be performed using leakage electromagnetic waves while avoiding the effect of the conductive member. is there.
【０００７】しかしながら、この方法を採用する場合に
は、シリンダ状アンテナコイルでは、その軸方向に関し
て磁束の方向性があるため、送受信の感度にも方向性が
存在し、シリンダ状アンテナコイルの軸方向と、該軸方
向に直交する方向とでは送受信感度が異なるため送受信
の方向が制限される。However, when this method is employed, since the cylindrical antenna coil has magnetic flux directionality with respect to the axial direction, the transmission / reception sensitivity also has directionality, and the axial direction of the cylindrical antenna coil is large. The transmission / reception sensitivity is different from the direction orthogonal to the axial direction, so that the transmission / reception direction is limited.
【０００８】そのため、リーダライタ端末機で送受信を
行う場合にはＲＦＩＤタグの方向を確認しながら送受信
を行わなければならず、特にＲＦＩＤタグが容器や包装
体で遮蔽された状態で使用される場合にはＲＦＩＤタグ
の方向が分からず読み取り操作に手間がかかるという問
題がある。[0008] Therefore, when performing transmission and reception with the reader / writer terminal, it is necessary to perform transmission and reception while confirming the direction of the RFID tag, especially when the RFID tag is used in a state where it is shielded by a container or a package. Has a problem in that the direction of the RFID tag is not known and the reading operation is troublesome.
【０００９】本発明は前記課題を解決するものであり、
その目的とするところは、シリンダ状のアンテナコイル
の軸方向を互いに略直交に配置した２つのＲＦＩＤタグ
を固定手段により互いに固定することで、シリンダ状の
アンテナコイルの軸方向を取付部材の取付面に対して略
平行に配置して設置した場合の送受信感度の方向性の制
限を緩和したＲＦＩＤタグ構造体及びその取付構造を提
供せんとするものである。The present invention has been made to solve the above problems, and
The object is to fix the two RFID tags, in which the axial directions of the cylindrical antenna coil are arranged substantially perpendicular to each other, to each other by fixing means, so that the axial direction of the cylindrical antenna coil is fixed to the mounting surface of the mounting member. The present invention provides an RFID tag structure and a mounting structure in which the restriction on the directionality of transmission / reception sensitivity in the case where the RFID tag structure is installed substantially parallel to the RFID tag is relaxed.
【００１０】[0010]
【課題を解決するための手段】前記目的を達成するため
の本発明に係るＲＦＩＤタグ構造体は、シリンダ状アン
テナコイルの軸方向を互いに略直交に配置した２つのＲ
ＦＩＤタグを固定手段により互いに固定したことを特徴
とする。In order to achieve the above object, an RFID tag structure according to the present invention comprises two cylindrical antenna coils, each of which has an axial direction perpendicular to each other.
The FID tags are fixed to each other by fixing means.
【００１１】上記構成によれば、２つのＲＦＩＤタグの
シリンダ状アンテナコイルの軸方向を互いに略直交に配
置することで、アンテナコイルの軸方向と、該軸方向に
直交する方向とでの送受信感度を略同じ程度にすること
が出来、シリンダ状のアンテナコイルの軸方向を取付部
材の取付面に対して略平行に配置して設置した場合でも
送受信感度の方向性の制限を緩和することが出来る。According to the above configuration, by arranging the axial directions of the cylindrical antenna coils of the two RFID tags substantially orthogonal to each other, the transmission / reception sensitivity in the axial direction of the antenna coil and the direction orthogonal to the axial direction is obtained. Can be made substantially the same, and even if the axial direction of the cylindrical antenna coil is disposed substantially parallel to the mounting surface of the mounting member, the directionality of the transmission and reception sensitivity can be relaxed. .
【００１２】また、前記２つのＲＦＩＤタグのシリンダ
状アンテナコイルを、Ｌ字形状やＴ字形状、若しくは交
差して配置した場合には構成が簡単であるため好まし
い。It is preferable that the cylindrical antenna coils of the two RFID tags are arranged in an L-shape, a T-shape, or intersecting, because the configuration is simple.
【００１３】また、前記固定手段が樹脂モールド体であ
る場合には、ＲＦＩＤタグの固定が容易で且つＲＦＩＤ
タグへの外力に対する保護が出来、電磁波の伝播性も確
保し易い。When the fixing means is a resin molded body, the RFID tag can be easily fixed and the RFID tag can be easily fixed.
It is possible to protect against external force to the tag, and it is easy to secure the propagation of electromagnetic waves.
【００１４】また、表面側に開口部を有する容器内に前
記ＲＦＩＤタグが収容された場合には、外部からの応力
や衝撃に対して容器によりＲＦＩＤタグを保護すること
が出来る。When the RFID tag is housed in a container having an opening on the front side, the RFID tag can be protected by the container against external stress and impact.
【００１５】また、前記容器が非磁性材料で作られた場
合には、ＲＦＩＤタグの取り付けが容易で電磁波の伝播
性も良好である。When the container is made of a non-magnetic material, the RFID tag can be easily attached and the propagation of electromagnetic waves is good.
【００１６】また、前記容器が導電性材料で作られ、該
容器の開口部が導電性材料で作られた蓋体で覆われ、該
容器と該蓋体との間、或いは該容器または該蓋体に磁束
漏洩路が形成された場合には、導電性材料で作られた容
器と蓋体との内部にＲＦＩＤタグを封入することによ
り、外部からの応力や衝撃に対して一層強いものとな
り、且つ磁束漏洩路を介して電磁波が漏洩し、ＲＦＩＤ
タグと外部のリーダライタ端末機との間で電力送電媒体
及び情報通信媒体である交流磁界を相互に送受信するこ
とが出来る。Further, the container is made of a conductive material, and an opening of the container is covered with a lid made of a conductive material, and between the container and the lid, or between the container and the lid. If a magnetic flux leakage path is formed in the body, by enclosing the RFID tag inside the container and lid made of a conductive material, it becomes more resistant to external stress and impact, In addition, the electromagnetic wave leaks through the magnetic flux leakage path, and the RFID
An AC magnetic field, which is a power transmission medium and an information communication medium, can be transmitted and received between the tag and an external reader / writer terminal.
【００１７】また、前記ＲＦＩＤタグがＡＳＫ方式で電
磁波の送受信が可能なシリンダ状アンテナコイルと、制
御部とを有する場合には、導電性部材からの影響をより
少なくすることが出来る。Further, when the RFID tag has a cylindrical antenna coil capable of transmitting and receiving electromagnetic waves by the ASK method and a control unit, the influence of the conductive member can be further reduced.
【００１８】また、本発明に係るＲＦＩＤタグ構造体の
取付構造は、前述のＲＦＩＤタグ構造体の取付部材への
取付構造であって、前記２つのＲＦＩＤタグのシリンダ
状アンテナコイルの軸方向が前記取付部材の取付面に対
して略平行になるように取り付けたことを特徴とする。The mounting structure of the RFID tag structure according to the present invention is the mounting structure of the above-described RFID tag structure to a mounting member, wherein the axial direction of the cylindrical antenna coil of the two RFID tags is It is characterized by being mounted so as to be substantially parallel to the mounting surface of the mounting member.
【００１９】上記構成によれば、シリンダ状アンテナコ
イルを有するＲＦＩＤタグを導電性部材に取り付けても
漏洩電磁波を利用して該導電性部材の影響を回避して良
好な送受信が可能である。According to the above configuration, even when an RFID tag having a cylindrical antenna coil is attached to a conductive member, good transmission / reception can be achieved by using a leaked electromagnetic wave to avoid the influence of the conductive member.
【００２０】[0020]
【発明の実施の形態】図により本発明に係るＲＦＩＤタ
グ構造体及びその取付構造の一実施形態を具体的に説明
する。図１は本発明に係るＲＦＩＤタグ構造体に採用さ
れるＲＦＩＤタグ単体の構成を示す図、図２は本発明に
係るＲＦＩＤタグ構造体に採用されるＲＦＩＤタグ単体
の制御系の構成を示すブロック図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an RFID tag structure according to the present invention and its mounting structure will be specifically described with reference to the drawings. FIG. 1 is a diagram showing the configuration of a single RFID tag used in the RFID tag structure according to the present invention, and FIG. 2 is a block diagram showing the configuration of a control system of the single RFID tag used in the RFID tag structure according to the present invention. FIG.
【００２１】また、図３（ａ），（ｂ）は２つのＲＦＩ
Ｄタグのシリンダ状アンテナコイルがＬ字形状に配置し
て樹脂モールドにより固定された本発明に係るＲＦＩＤ
タグ構造体の構成を示す平面図及び側面図、図４は図３
のＲＦＩＤタグ構造体のアンテナコイルに発生する磁界
の様子を示す図である。FIGS. 3A and 3B show two RFIs.
RFID according to the present invention in which a cylindrical antenna coil of a D tag is arranged in an L shape and fixed by resin molding
FIG. 4 is a plan view and a side view showing the structure of the tag structure.
FIG. 4 is a diagram showing a state of a magnetic field generated in an antenna coil of the RFID tag structure of FIG.
【００２２】また、図５（ａ），（ｂ）は２つのＲＦＩ
Ｄタグのシリンダ状アンテナコイルがＴ字形状に配置し
て樹脂モールドにより固定された本発明に係るＲＦＩＤ
タグ構造体の構成を示す平面図及び側面図、図６
（ａ），（ｂ）は２つのＲＦＩＤタグのシリンダ状アン
テナコイルが交差して配置して樹脂モールドにより固定
された本発明に係るＲＦＩＤタグ構造体の構成を示す平
面図及び側面図である。FIGS. 5A and 5B show two RFIs.
RFID according to the present invention in which a cylindrical antenna coil of a D tag is arranged in a T-shape and fixed by a resin mold
FIG. 6 is a plan view and a side view showing the configuration of the tag structure.
(A), (b) is the top view and side view which show the structure of the RFID tag structure which concerns on this invention in which the cylindrical antenna coil of two RFID tags was arrange | positioned crossing and was fixed with resin mold.
【００２３】また、図７は収容容器内に２つのＲＦＩＤ
タグのシリンダ状アンテナコイルをＬ字形状に配置して
収容し、樹脂モールドにより固定した後、収容容器の開
口部に蓋体を接着して閉鎖した構成を示す断面説明図、
図８は収容容器内に２つのＲＦＩＤタグのシリンダ状ア
ンテナコイルをＬ字形状に配置して収容し、樹脂モール
ドにより固定した後、収容容器の開口部に蓋体を螺着し
て閉鎖した構成を示す断面説明図である。FIG. 7 shows two RFIDs in a container.
Cross-sectional explanatory view showing a configuration in which a cylindrical antenna coil of a tag is arranged and housed in an L-shape, fixed by a resin mold, and then closed by bonding a lid to an opening of the housing container.
FIG. 8 shows a configuration in which the cylindrical antenna coils of two RFID tags are arranged and accommodated in an L-shape in an accommodation container, fixed by a resin mold, and closed by screwing a lid to an opening of the accommodation container. FIG.
【００２４】また、図９は図７に示す蓋体を省略して収
容容器内に２つのＲＦＩＤタグのシリンダ状アンテナコ
イルをＬ字形状に配置して収容し、樹脂モールドにより
固定した構成を示す断面説明図、図10は図３に示す樹脂
モールドしたＲＦＩＤタグ構造体を取付部材の溝部内に
収容して樹脂封止した構成を示す断面説明図である。FIG. 9 shows a configuration in which the lids shown in FIG. 7 are omitted, and the cylindrical antenna coils of the two RFID tags are arranged and accommodated in an L-shape in an accommodation container and fixed by resin molding. FIG. 10 is a sectional explanatory view showing a configuration in which the resin-molded RFID tag structure shown in FIG. 3 is housed in the groove of the mounting member and sealed with resin.
【００２５】先ず、図１及び図２を用いてＲＦＩＤタグ
１の構成について説明する。本実施形態で好適に採用さ
れるＲＦＩＤタグ１は、電磁結合方式、電磁誘導方式の
ＲＦＩＤタグであり、本実施形態では、電磁誘導方式の
ＲＦＩＤタグを用いた場合の一実施形態について以下に
説明する。First, the configuration of the RFID tag 1 will be described with reference to FIGS. The RFID tag 1 suitably employed in the present embodiment is an RFID tag of an electromagnetic coupling type or an electromagnetic induction type. In the present embodiment, an embodiment using an RFID tag of an electromagnetic induction type will be described below. I do.
【００２６】図１に示すＲＦＩＤタグ１は、シリンダ状
のアンテナコイル２と、制御部となる半導体ＩＣチップ
４とがプリント回路基板等を介さずに直結して構成され
ており、これによりＲＦＩＤタグ１の小型化を実現して
いる。The RFID tag 1 shown in FIG. 1 has a configuration in which a cylindrical antenna coil 2 and a semiconductor IC chip 4 serving as a control unit are directly connected without a printed circuit board or the like. 1 is realized.
【００２７】単線巻きでシリンダ状に形成されたアンテ
ナコイル２の内部には軸方向（図１の左右方向）に鉄心
やフェライト等の円柱状のコア部材３が挿入されてい
る。A cylindrical core member 3 such as an iron core or ferrite is inserted in an axial direction (the left-right direction in FIG. 1) inside the antenna coil 2 formed in a single wire winding into a cylindrical shape.
【００２８】半導体ＩＣチップ４はＩＣ（半導体集積回
路）チップやＬＳＩ（半導体大規模集積回路）チップ等
の一体的にパッケージされて構成されたものであり、該
半導体ＩＣチップ４の内部には、図２に示すように、制
御部となるＣＰＵ４ａ、記憶部となるメモリ４ｂ、送受
信機４ｃ及び蓄電手段となるコンデンサ４ｄが設けられ
ている。The semiconductor IC chip 4 is formed by integrally packaging an IC (semiconductor integrated circuit) chip or an LSI (semiconductor large-scale integrated circuit) chip or the like. As shown in FIG. 2, a CPU 4a serving as a control unit, a memory 4b serving as a storage unit, a transceiver 4c, and a capacitor 4d serving as power storage means are provided.
【００２９】図示しない外部のリーダライタ端末機から
発信された信号は、送受信機４ｃを介してＣＰＵ４ａに
伝達され、電力はコンデンサ４ｄに蓄電される。尚、蓄
電手段となるコンデンサ４ｄが無く、外部のリーダライ
タ端末機から連続的に半導体ＩＣチップ４に電力が供給
されるものでも良い。A signal transmitted from an external reader / writer terminal (not shown) is transmitted to the CPU 4a via the transceiver 4c, and power is stored in the capacitor 4d. Note that there may be no capacitor 4d serving as power storage means, and power may be continuously supplied to the semiconductor IC chip 4 from an external reader / writer terminal.
【００３０】ＣＰＵ４ａは中央演算処理装置であり、メ
モリ４ｂに格納されたプログラムや各種データを読み出
し、必要な演算や判断を行い、各種制御を行うものであ
る。The CPU 4a is a central processing unit that reads out programs and various data stored in the memory 4b, performs necessary calculations and judgments, and performs various controls.
【００３１】メモリ４ｂにはＣＰＵ４ａが動作するため
の各種プログラムや電磁誘導タグ１ａが設置された物品
の各種固有情報が記憶されている。The memory 4b stores various programs for operating the CPU 4a and various kinds of unique information of the article on which the electromagnetic induction tag 1a is installed.
【００３２】例えば、アンテナコイル２の一例として
は、直径３０μｍ程度の銅線が単線巻きで径方向に多重
層で軸方向にシリンダ状に巻かれており、そのアンテナ
コイル２の内部にコア部材３が有る状態でのインダクタ
ンスは９．５mH（周波数１２５kHz）程度で、アンテナ
コイル２に共振用に別途接続されたコンデンサの静電容
量は１７０pF（周波数１２５kHz）程度であった。For example, as an example of the antenna coil 2, a copper wire having a diameter of about 30 μm is wound in a single wire and is wound in a multilayer shape in the radial direction and in a cylindrical shape in the axial direction. In this state, the inductance was about 9.5 mH (frequency 125 kHz), and the capacitance of a capacitor separately connected to the antenna coil 2 for resonance was about 170 pF (frequency 125 kHz).
【００３３】本実施形態のＲＦＩＤタグ１は、無線周波
が１波の振幅偏移変調（ＡＳＫ；Amplitude Shift Keyi
ng）の無線通信方式を使い、共振周波数帯域も広い、線
径も数十ミクロンの空心或いはコア部材３を有するアン
テナコイル２で特殊な送受信回路を組み込んだ消費電力
の非常に少ないＣＭＯＳ−ＩＣを使ったＲＦＩＤタグ１
を採用した。The RFID tag 1 of the present embodiment has a single radio frequency amplitude shift keying (ASK).
ng), a very low power consumption CMOS-IC incorporating a special transmitting / receiving circuit with an air coil or antenna coil 2 having a core member 3 having a wide resonance frequency band and a wire diameter of several tens of microns using a wide resonance frequency band. RFID tag 1 used
It was adopted.
【００３４】従来、電磁誘導方式、電磁結合方式のＲＦ
ＩＤタグは、内部に埋設されたアンテナコイルを貫く磁
界の変化により電力の受電及び信号の送受信を可能にす
るものであるためＲＦＩＤタグの設置場所付近にＲＦＩ
Ｄタグの通信や電力搬送を行う際に生じる磁界により渦
電流を発生して通信に影響を及ぼす磁性体や金属等の導
電性部材が存在すると、その導電性部材の影響によって
磁界が減衰して利用出来なくなるという固定観念があっ
たためにＲＦＩＤタグの近辺から磁性体や金属物品を排
除するのが常識であり、金属容器や金属物品にＲＦＩＤ
タグを取り付けようとする試みはこれまでなされていな
かった。Conventionally, electromagnetic induction type and electromagnetic coupling type RF
The ID tag enables power reception and signal transmission / reception by a change in a magnetic field penetrating an antenna coil embedded therein.
If there is a conductive member such as a magnetic material or metal that affects communication by generating an eddy current due to a magnetic field generated during D tag communication or power transfer, the magnetic field is attenuated by the effect of the conductive member. It is common sense to remove magnetic materials and metal articles from the vicinity of RFID tags due to the stereotype that they cannot be used.
No attempt has been made to attach the tag.
【００３５】そこで、本発明者等は、金属や磁性体等の
導電性部材へのＲＦＩＤタグの有効利用を目的として、
ＲＦＩＤタグの設置場所付近に導電性部材が存在する
と、該導電性部材の影響によって磁界が減衰して使用出
来なくなるという従来の固定観念を排除して、導電性部
材により囲まれていてもＲＦＩＤタグを収容する容器の
蓋等の僅かな隙間があれば外部との電磁波交信が可能で
あることを実験的に見い出し、これによりＲＦＩＤタグ
の保全を確保しつつ該ＲＦＩＤタグの有効利用を実現さ
せたものである。Therefore, the present inventors aimed at making effective use of RFID tags for conductive members such as metals and magnetic materials.
If a conductive member is present near the installation location of the RFID tag, the conventional fixed idea that the magnetic field is attenuated and cannot be used due to the effect of the conductive member is eliminated, and the RFID tag is surrounded by the conductive member. It has been experimentally found that if there is a small gap such as a lid of a container for accommodating RFID, electromagnetic wave communication with the outside is possible, thereby realizing effective use of the RFID tag while securing the maintenance of the RFID tag. Things.
【００３６】ＲＦＩＤタグでは外部のリーダライタ端末
機から送信された交流磁界をＲＦＩＤタグに内蔵された
アンテナコイルの共振周波数により受信する。その際に
従来のＲＦＩＤタグは、通信距離を伸ばすために周波数
偏移変調（ＦＳＫ；Frequency Shift Keying）方式で無
線周波は、例えば、１２５kHzと１１７kHzの２波を使用
し、尚且つ受信電力を増やすためアンテナコイルにフェ
ライトコアを使い、コイルの線径を太くして複数巻きに
して通信距離を伸ばす方式が一般的であった。The RFID tag receives an AC magnetic field transmitted from an external reader / writer terminal at a resonance frequency of an antenna coil built in the RFID tag. At this time, the conventional RFID tag uses two frequency waves, for example, 125 kHz and 117 kHz by a frequency shift keying (FSK) method in order to extend a communication distance, and increases reception power. Therefore, it has been common to use a ferrite core for the antenna coil, increase the wire diameter of the coil, and extend the coil to extend the communication distance.
【００３７】無線周波を２波使う周波数偏移変調（ＦＳ
Ｋ）方式は、金属や磁性体等の導電性部材が近づくと受
信周波数がずれて受信電力が低下すると共に通信エラー
が発生して通信が出来なくなり通信距離が極端に低下
し、実用上、使用不可能になるためＲＦＩＤタグは、金
属や磁性体等の導電性部材に取り付けて使用することは
不可能であるとの固定観念が支配的であった。Frequency shift keying (FS) using two radio frequencies
In the K) method, when a conductive member such as a metal or a magnetic material approaches, the reception frequency shifts, the reception power decreases, a communication error occurs, communication becomes impossible, and the communication distance is extremely reduced. The stereotype that the RFID tag cannot be used by being attached to a conductive member such as a metal or a magnetic material is dominant because it becomes impossible.
【００３８】しかしながら、最近では無線周波は、１波
の振幅偏移変調（ＡＳＫ）の無線通信方式を使い、共振
周波数帯域も広い、線径も数十ミクロンの空心アンテナ
コイルで特殊な送受信回路を組み込んだ消費電力の非常
に少ないＣＭＯＳ−ＩＣを使ったＲＦＩＤタグが提案さ
れた。However, recently, the radio frequency uses a one-wave amplitude shift keying (ASK) radio communication system, and a special transmitting / receiving circuit is formed by an air-core antenna coil having a wide resonance frequency band and a wire diameter of several tens of microns. An RFID tag using a built-in CMOS-IC with very low power consumption has been proposed.
【００３９】このＲＦＩＤタグは金属や磁性体等の導電
性部材が近くにあっても振幅偏移変調（ＡＳＫ）の無線
通信方式を使い、ＦＳＫに比べて共振周波数帯域が広い
ため、周波数がずれても受信電力は低下せず、無線通信
も殆んど影響を受けないことが本発明者等が行った実験
結果により判明した。This RFID tag uses a radio communication method of amplitude shift keying (ASK) even when a conductive member such as a metal or a magnetic material is nearby, and has a wider resonance frequency band than FSK, so that the frequency is shifted. However, it has been found from the results of experiments conducted by the present inventors that the received power does not decrease and wireless communication is hardly affected.
【００４０】更に、本発明者等が行った実験結果によれ
ば、磁界は狭い隙間であっても回析現象により狭い隙間
から伝搬することが判明したものであり、導電性部材に
囲まれた場合であっても、分割された導電性部材同士の
接合面やネジ部等の接触面、或いはスリットや切り欠き
や穴等の物理的な僅かな隙間である磁束漏洩路を実用的
なレベルで送受信可能な量の磁束が漏洩し得るように形
成し、それを検証することでＲＦＩＤタグと外部のリー
ダライタ端末機との間で電力送電媒体及び情報通信媒体
である交流磁界を相互に送受信することが出来ることを
見い出したものである。Further, according to the results of experiments conducted by the present inventors, it was found that the magnetic field propagated from the narrow gap due to the diffraction phenomenon even in the narrow gap, and the magnetic field was surrounded by the conductive member. Even in such a case, a magnetic flux leakage path, which is a contact surface between the divided conductive members, a contact surface such as a screw portion, or a physical small gap such as a slit, a notch, or a hole, is at a practical level. An exchangeable magnetic field, which is a power transmission medium and an information communication medium, is mutually transmitted and received between the RFID tag and an external reader / writer terminal by verifying that the amount of magnetic flux that can be transmitted and received can be leaked. It is a thing that I can do.
【００４１】図３では、２つのＲＦＩＤタグ１のシリン
ダ状アンテナコイル２を略直交させてＬ字形状に配置
し、固定手段となる樹脂モールド体５によりモールド被
覆して互いに固定したものである。In FIG. 3, the cylindrical antenna coils 2 of the two RFID tags 1 are arranged in an L-shape so as to be substantially perpendicular to each other, and are fixed to each other by being mold-coated with a resin mold body 5 as fixing means.
【００４２】本実施形態では樹脂モールド体５を円柱状
に形成してＲＦＩＤタグ構造体Ａの外形を円柱形状で構
成した場合の一例について説明するが、ＲＦＩＤタグ構
造体Ａの外形は方形や他の種々の形状であっても良い。In this embodiment, an example in which the resin mold body 5 is formed in a cylindrical shape and the outer shape of the RFID tag structure A is formed in a cylindrical shape will be described. However, the outer shape of the RFID tag structure A may be square or other. May be various shapes.
【００４３】図４は図３のＲＦＩＤタグ構造体Ａの２つ
の略直交するシリンダ状のアンテナコイル２に夫々発生
する磁界Ｈの様子を示す図である。１つのシリンダ状の
アンテナコイル２に発生する磁界Ｈでは、該アンテナコ
イル２の軸方向に関して磁束の方向性があるため、送受
信の感度にも方向性が存在し、アンテナコイル２の軸方
向と、該軸方向に直交する方向とでは送受信感度が異な
るため送受信の方向性が制限されるが、図４に示すよう
に、２つのアンテナコイル２を略直交させて配置したこ
とでアンテナコイル２の軸方向と、該軸方向に直交する
方向とでの送受信感度を略同じ程度にすることが出来、
送受信の方向性の制限を緩和することが出来る。FIG. 4 is a diagram showing a state of a magnetic field H generated in each of two substantially orthogonal cylindrical antenna coils 2 of the RFID tag structure A of FIG. In the magnetic field H generated in one cylindrical antenna coil 2, since there is a magnetic flux direction with respect to the axial direction of the antenna coil 2, there is also a directionality in transmission / reception sensitivity. Since the transmission and reception sensitivity differs from the direction orthogonal to the axial direction, the directionality of transmission and reception is limited. However, as shown in FIG. Direction, the transmission and reception sensitivity in the direction orthogonal to the axial direction can be substantially the same,
Restrictions on the directionality of transmission and reception can be relaxed.
【００４４】また、２つのＲＦＩＤタグ１は同じアドレ
スやコード等に設定されており、応答信号が入力される
と、感度の良い方が最初に応答し、それが優先される。
また、同時に応答しても同じ信号であるため相互干渉が
起こることはない。The two RFID tags 1 are set to the same address, code, and the like, and when a response signal is input, the one with higher sensitivity responds first, and the response is given priority.
Even if they respond simultaneously, they do not cause mutual interference because they are the same signal.
【００４５】従って、ＲＦＩＤタグ構造体Ａが容器や包
装体で遮蔽された状態で使用される場合であってもＲＦ
ＩＤタグ構造体Ａの方向に関わらず良好な読み取りが出
来、操作性が向上する。Accordingly, even when the RFID tag structure A is used in a state where it is shielded by a container or a package, the RF tag structure A
Good reading can be performed regardless of the direction of the ID tag structure A, and operability is improved.
【００４６】図５では、２つのＲＦＩＤタグ１のシリン
ダ状アンテナコイル２が略直交するようにＴ字形状に配
置して、固定手段となる樹脂モールド体５によりモール
ド被覆して互いに固定されたものである。他の構成は図
３と略同様に構成され、同様の効果を得ることが出来る
ものである。In FIG. 5, the cylindrical antenna coils 2 of the two RFID tags 1 are arranged in a T-shape so as to be substantially orthogonal to each other, and are fixed to each other by being covered with a resin mold body 5 as fixing means. It is. Other configurations are substantially the same as those in FIG. 3 and can achieve the same effects.
【００４７】図６では、２つのＲＦＩＤタグ１のシリン
ダ状アンテナコイル２が略直交するように立体交差して
配置して、固定手段となる樹脂モールド体５によりモー
ルド被覆して互いに固定されたものである。他の構成は
図３と略同様に構成され、同様の効果を得ることが出来
るものである。In FIG. 6, the cylindrical antenna coils 2 of the two RFID tags 1 are arranged so as to cross each other so as to be substantially orthogonal to each other, and are fixed to each other by being covered with a resin mold body 5 as fixing means. It is. Other configurations are substantially the same as those in FIG. 3 and can achieve the same effects.
【００４８】上記２つのＲＦＩＤタグ１のシリンダ状ア
ンテナコイル２の配置は、互いに直角（９０度）であれ
ば好ましい。尚、２つのＲＦＩＤタグ１のシリンダ状ア
ンテナコイル２の好ましい配置角度は９０度±５度程度
であり、９０度±１０度程度が実用上可能範囲である。The arrangement of the cylindrical antenna coils 2 of the two RFID tags 1 is preferably at right angles (90 degrees) to each other. Note that a preferable arrangement angle of the cylindrical antenna coil 2 of the two RFID tags 1 is about 90 degrees ± 5 degrees, and about 90 degrees ± 10 degrees is a practically possible range.
【００４９】図７〜図９は表面側に開口部を有する容器
Ｂ内に２つのＲＦＩＤタグ１のシリンダ状のアンテナコ
イル２の軸方向を互いに略直交に配置して収容し、固定
手段となる樹脂モールド体５によりモールド被覆して互
いに固定したものである。FIG. 7 to FIG. 9 show a case in which the axial directions of the cylindrical antenna coils 2 of the two RFID tags 1 are accommodated in a container B having an opening on the front surface side so as to be substantially orthogonal to each other. They are covered with a resin mold body 5 and fixed to each other.
【００５０】尚、容器Ｂは樹脂や陶器等の各種の非磁性
材料で作られたものであっても良いが、図７では、導電
性材料となる金属製の収容容器６の断面円形の凹部内に
２つのＲＦＩＤタグ１のシリンダ状アンテナコイル２を
Ｌ字形状に配置して収容し、樹脂モールド体５によりモ
ールド被覆して固定した後、収容容器６の開口部に同じ
く導電性材料となる金属製の蓋体７を接着剤により接着
して閉鎖したものである。The container B may be made of various non-magnetic materials such as resin and ceramics, but in FIG. 7, the concave portion having a circular cross section of the metal container 6 which is a conductive material is shown. After the two cylindrical antenna coils 2 of the RFID tags 1 are arranged in an L-shape and accommodated therein, and are molded and fixed with the resin mold body 5, the conductive material is similarly formed in the opening of the accommodation container 6. The metal lid 7 is closed by bonding with an adhesive.
【００５１】蓋体７は円盤板状の蓋体であり、収容容器
６の開口縁に対応する位置に段差部を設けて装着され
る。The lid 7 is a disk-shaped lid, and is provided with a step at a position corresponding to the opening edge of the container 6.
【００５２】また、図８では、収容容器６内に２つのＲ
ＦＩＤタグ１のシリンダ状アンテナコイル２をＬ字形状
に配置して収容し、樹脂モールド体５によりモールド被
覆して固定した後、収容容器６の開口部に蓋体７を螺着
して閉鎖したものである。In FIG. 8, two R
The cylindrical antenna coil 2 of the FID tag 1 is arranged and accommodated in an L-shape, fixed by being covered with a resin mold 5 and then closed by screwing a lid 7 on an opening of the accommodation container 6. Things.
【００５３】尚、蓋体７は、該蓋体７の上面に係合穴を
形成し、図示しない締着治具を該係合穴に係合させて蓋
体７を収容容器６に螺着することでも良いし、蓋体７の
側面に締着治具を係合させて蓋体７を収容容器６に螺着
することでも良い。The cover 7 has an engagement hole formed on the upper surface of the cover 7 and a fastening jig (not shown) is engaged with the engagement hole to screw the cover 7 to the container 6. Alternatively, a fastening jig may be engaged with the side surface of the lid 7 and the lid 7 may be screwed to the storage container 6.
【００５４】収容容器６と蓋体７との接合部は、実用的
なレベルで送受信可能な量の磁束が漏洩し得るように磁
束漏洩路が形成され、図７に示すような接着であれば所
定の隙間が形成されるように略平滑な接触面が形成さ
れ、図８に示すようなネジ止めであればネジ螺合部に所
定の隙間が形成されるようにネジ部の接触面が形成され
る。A magnetic flux leakage path is formed at the joint between the container 6 and the lid 7 so that a sufficient amount of magnetic flux can be transmitted and received at a practical level. A substantially smooth contact surface is formed so that a predetermined gap is formed, and in the case of screwing as shown in FIG. 8, the contact surface of the screw portion is formed such that a predetermined gap is formed in the screwed portion. Is done.
【００５５】上記の接触面は特別な間隙を設計するので
はなく、それ等の接触表面を所望の表面粗度で加工する
ことによって形成することが現実的である。その場合の
対向する両表面は互いに分散接触し、磁束漏洩路は分散
した非接触部分を利用して形成される。It is realistic that the above-mentioned contact surfaces are formed by machining such contact surfaces with a desired surface roughness, rather than designing a special gap. In this case, the opposing surfaces are in distributed contact with each other, and the magnetic flux leakage path is formed using the dispersed non-contact portion.
【００５６】接触面の表面粗度は、例えば、互いに対向
する表面の一方の表面粗度が０．０４μｍ程度に加工さ
れ、これにより接触面の隙間として少なくとも０．０８
μｍ程度が形成され、所望の電磁波の漏洩度が確保され
るように実用的なレベルで検証されたものである。The surface roughness of the contact surface is, for example, such that one of the surfaces facing each other is processed to have a surface roughness of about 0.04 μm, whereby the gap between the contact surfaces is at least 0.08 μm.
It has been verified on a practical level so as to have a thickness of about μm and to ensure a desired degree of electromagnetic wave leakage.
【００５７】尚、磁束を漏洩させる磁束漏洩路として
は、収容容器６の側壁や蓋体７に切り欠きや穴、或いは
スリット等を設けて構成しても良い。As a magnetic flux leakage path for leaking magnetic flux, a cutout, a hole, a slit, or the like may be provided in the side wall of the container 6 or the lid 7.
【００５８】尚、ＲＦＩＤタグ１の通信や電力搬送を行
う際に生じる磁界Ｈにより渦電流を発生して元の磁束を
減衰する反対方向の磁束を発生し、通信に影響を及ぼす
導電性材料としては、鉄、コバルト、ニッケル、及びそ
れ等の合金、フェライト等の強磁性を有する金属、或い
はアルミニウム、銅、クローム等の常磁性を有する金
属、更には導電性プラスチック等が適用可能である。As a conductive material that generates an eddy current due to a magnetic field H generated during communication and power transfer of the RFID tag 1 to attenuate the original magnetic flux, and that affects the communication, For example, iron, cobalt, nickel, alloys thereof, ferromagnetic metals such as ferrite, paramagnetic metals such as aluminum, copper, and chrome, and conductive plastics can be used.
【００５９】ＲＦＩＤタグ１は、前述したＡＳＫ方式で
電磁波の送受信が可能なシリンダ状アンテナコイル２
と、制御部を含む半導体ＩＣチップ４とを有して構成さ
れている。The RFID tag 1 has a cylindrical antenna coil 2 capable of transmitting and receiving electromagnetic waves by the ASK method described above.
And a semiconductor IC chip 4 including a control unit.
【００６０】そして、図７及び図８に示すように収容容
器６と蓋体７との間に形成される磁束漏洩路から漏洩す
る漏れ磁束により形成される磁界Ｈを利用してＲＦＩＤ
タグ１に記憶された情報を図示しない外部のリーダライ
タ端末機により取り出すことが出来る。Then, as shown in FIG. 7 and FIG. 8, RFID utilizes a magnetic field H formed by a leakage magnetic flux leaking from a magnetic flux leakage path formed between the container 6 and the lid 7.
The information stored in the tag 1 can be retrieved by an external reader / writer terminal (not shown).
【００６１】図９では、図７に示す蓋体７を省略して収
容容器６内に２つのＲＦＩＤタグ１のシリンダ状アンテ
ナコイル２をＬ字形状に配置して収容し、樹脂モールド
体５によりモールド被覆して固定したものである。この
場合、樹脂モールド体５の上方に漏洩する漏れ磁束によ
り形成される磁界Ｈを利用してＲＦＩＤタグ１に記憶さ
れた情報を図示しない外部のリーダライタ端末機により
取り出すことが出来る。In FIG. 9, the lid 7 shown in FIG. 7 is omitted and the cylindrical antenna coils 2 of the two RFID tags 1 are arranged and accommodated in an L-shape in the accommodation container 6. It was fixed by coating with a mold. In this case, the information stored in the RFID tag 1 can be taken out by an external reader / writer terminal (not shown) using the magnetic field H formed by the leakage magnetic flux leaking above the resin mold body 5.
【００６２】図10では、図３に示す樹脂モールドしたＲ
ＦＩＤタグ構造体Ａを、２つのＲＦＩＤタグ１のシリン
ダ状アンテナコイル２の軸方向が導電性部材からなる取
付部材８の断面円形の凹部を有する溝部８ａ内の底面で
ある取付面８ｂに対して略平行になるように収容配置
し、樹脂９を充填して樹脂封止したものである。In FIG. 10, the resin-molded R shown in FIG.
The FID tag structure A is attached to an attachment surface 8b, which is a bottom surface in a groove 8a having a circular cross section of an attachment member 8 in which the axial direction of the cylindrical antenna coil 2 of the two RFID tags 1 is a conductive member. It is housed and arranged so as to be substantially parallel, filled with resin 9 and sealed with resin.
【００６３】この場合、樹脂モールド体５及び樹脂９の
上方に漏洩する漏れ磁束により形成される磁界Ｈを利用
してＲＦＩＤタグ１に記憶された情報を図示しない外部
のリーダライタ端末機により取り出すことが出来る。In this case, the information stored in the RFID tag 1 is taken out by an external reader / writer terminal (not shown) using the magnetic field H formed by the leakage magnetic flux leaking above the resin mold body 5 and the resin 9. Can be done.
【００６４】尚、前記実施形態では、容器Ｂや取付部材
８を金属製等の導電性材料で作成した場合の一例につい
て説明したが、２つのシリンダ状のアンテナコイル２が
略直交して配置されたＲＦＩＤタグ構造体Ａを樹脂やそ
の他の非磁性材料で作られた分割型の容器Ｂに収容した
り、樹脂やその他の非磁性材料で作られた取付部材８に
取り付けることでも良い。In the above embodiment, an example was described in which the container B and the mounting member 8 were made of a conductive material such as metal. However, the two cylindrical antenna coils 2 are arranged substantially orthogonally. The RFID tag structure A may be housed in a divided container B made of resin or other non-magnetic material, or may be attached to a mounting member 8 made of resin or other non-magnetic material.
【００６５】尚、取付部材８の断面は円形に限らず方形
や長円形、船底形（円弧溝）等各種の形状であっても良
い。The cross section of the mounting member 8 is not limited to a circle, but may be various shapes such as a square, an ellipse, and a ship bottom (arc groove).
【００６６】上記構成によれば、２つのＲＦＩＤタグ１
のシリンダ状アンテナコイル２の軸方向を互いに略直交
に配置することで、シリンダ状のアンテナコイル２の軸
方向を導電性材料で作成された取付部材８の取付面８ｂ
に対して略平行に配置して設置した場合でも送受信感度
の方向性の制限を緩和することが出来る。According to the above configuration, the two RFID tags 1
By arranging the axial directions of the cylindrical antenna coil 2 substantially orthogonal to each other, the axial direction of the cylindrical antenna coil 2 is changed to the mounting surface 8b of the mounting member 8 made of a conductive material.
Even in the case where the antenna is arranged so as to be substantially parallel to the above, the restriction on the directionality of the transmission / reception sensitivity can be relaxed.
【００６７】また、２つのＲＦＩＤタグ１のシリンダ状
アンテナコイル２を、Ｌ字形状やＴ字形状、若しくは交
差して配置すれば、シリンダ状のアンテナコイル２の軸
方向を互いに略直交に配置することが出来、単体のＲＦ
ＩＤタグ１を２つ用いることで良いので構成が簡単で好
ましい。When the cylindrical antenna coils 2 of the two RFID tags 1 are arranged in an L-shape, a T-shape, or intersecting, the axial directions of the cylindrical antenna coils 2 are arranged substantially orthogonal to each other. Can be a single RF
The configuration is simple and preferable because two ID tags 1 can be used.
【００６８】また、シリンダ状のアンテナコイル２の軸
方向を互いに略直交に配置して固定する固定手段が樹脂
モールド体５である場合には、ＲＦＩＤタグ１の固定が
容易で且つＲＦＩＤタグ１への外力に対する保護が出
来、電磁波の伝播性も確保し易い。When the fixing means for arranging and fixing the cylindrical antenna coil 2 so that the axial directions thereof are substantially orthogonal to each other is the resin molded body 5, the RFID tag 1 is easily fixed and attached to the RFID tag 1. Can be protected against external force, and the propagation of electromagnetic waves can be easily ensured.
【００６９】また、表面側に開口部を有する収容容器６
内にＲＦＩＤタグ１を収容した場合には、外部からの応
力や衝撃に対して収容容器６によりＲＦＩＤタグ１を保
護することが出来る。The container 6 having an opening on the front surface side
When the RFID tag 1 is housed inside, the housing container 6 can protect the RFID tag 1 against external stress and impact.
【００７０】また、収容容器６が非磁性材料で作られた
場合には、ＲＦＩＤタグ１の取り付けが容易で電磁波の
伝播性も良好である。When the container 6 is made of a non-magnetic material, the RFID tag 1 can be easily attached and electromagnetic wave propagation is good.
【００７１】また、収容容器６が導電性材料で作られ、
該収容容器６の開口部が導電性材料で作られた蓋体７で
覆われ、該収容容器６と該蓋体７との間、或いは該収容
容器６または該蓋体７に磁束漏洩路が形成された場合に
は、導電性材料で作られた収容容器６と蓋体７との内部
にＲＦＩＤタグ１を封入することにより、外部からの応
力や衝撃に対して一層強いものとなり、且つ磁束漏洩路
を介して電磁波が漏洩し、ＲＦＩＤタグ１と外部のリー
ダライタ端末機との間で電力送電媒体及び情報通信媒体
である交流磁界を相互に送受信することが出来る。The container 6 is made of a conductive material,
The opening of the container 6 is covered with a lid 7 made of a conductive material, and a magnetic flux leakage path is provided between the container 6 and the lid 7 or in the container 6 or the lid 7. When the RFID tag 1 is formed, the RFID tag 1 is sealed in the container 6 and the lid 7 made of a conductive material, so that the RFID tag 1 is more resistant to external stress and impact, and the magnetic flux is increased. The electromagnetic wave leaks through the leak path, so that the RFID tag 1 and an external reader / writer terminal can mutually transmit and receive an AC magnetic field as a power transmission medium and an information communication medium.
【００７２】また、ＲＦＩＤタグ１がＡＳＫ方式で電磁
波の送受信が可能なシリンダ状アンテナコイル２と、制
御部を含む半導体ＩＣチップ４を有する場合には、導電
性部材からの影響をより少なくすることが出来る。When the RFID tag 1 has the cylindrical antenna coil 2 capable of transmitting and receiving electromagnetic waves by the ASK method and the semiconductor IC chip 4 including the control unit, the influence of the conductive member is further reduced. Can be done.
【００７３】また、シリンダ状アンテナコイル２を有す
るＲＦＩＤタグ１を導電性部材からなる取付部材８に取
り付けても漏洩電磁波を利用して該導電性部材の影響を
回避して良好な送受信が可能である。Even when the RFID tag 1 having the cylindrical antenna coil 2 is attached to the attachment member 8 made of a conductive member, good transmission and reception can be performed by utilizing the leakage electromagnetic wave to avoid the influence of the conductive member. is there.
【００７４】導電性材料で作られた分割型の容器Ｂ内に
ＲＦＩＤタグ１を収容した場合には、その分割部に形成
される磁束漏洩路を通して電磁波が外部に伝播すること
が出来る。When the RFID tag 1 is accommodated in the divided type container B made of a conductive material, the electromagnetic wave can propagate outside through the magnetic flux leakage path formed in the divided portion.
【００７５】尚、磁束漏洩路の経路長と該磁束漏洩路の
間隙幅（平均間隙幅）は外部のリーダライタ端末機との
間に電磁波の送信が可能な最低値以上有れば良く、０．
０８μｍ程度の間隙幅（平均間隙幅）があれば十分であ
る。The path length of the magnetic flux leakage path and the gap width (average gap width) of the magnetic flux leakage path may be at least a minimum value capable of transmitting an electromagnetic wave to an external reader / writer terminal. .
A gap width of about 08 μm (average gap width) is sufficient.
【００７６】[0076]
【発明の効果】本発明は、上述の如き構成と作用とを有
するので、シリンダ状のアンテナコイルの軸方向を互い
に略直交に配置した２つのＲＦＩＤタグを固定手段によ
り互いに固定することで、シリンダ状のアンテナコイル
の軸方向を取付部材の取付面に対して略平行に配置して
設置した場合の送受信感度の方向性の制限を緩和したＲ
ＦＩＤタグ構造体及びその取付構造を提供することが出
来る。Since the present invention has the above-described configuration and operation, the two RFID tags, in which the axial directions of the cylindrical antenna coils are arranged substantially orthogonal to each other, are fixed to each other by the fixing means. R which relaxes the restriction on the directionality of the transmission / reception sensitivity when the antenna coil is installed with the axial direction of the antenna coil arranged substantially parallel to the mounting surface of the mounting member.
An FID tag structure and an attachment structure thereof can be provided.
【００７７】即ち、２つのＲＦＩＤタグのシリンダ状ア
ンテナコイルの軸方向を互いに略直交に配置すること
で、アンテナコイルの軸方向と、該軸方向に直交する方
向とでの送受信感度を略同じ程度にすることが出来、シ
リンダ状のアンテナコイルの軸方向を取付部材の取付面
に対して略平行に配置して設置した場合でも送受信感度
の方向性の制限を緩和することが出来る。That is, by arranging the axial directions of the cylindrical antenna coils of the two RFID tags substantially orthogonal to each other, the transmission and reception sensitivities in the axial direction of the antenna coil and the direction orthogonal to the axial direction are substantially the same. Therefore, even when the axial direction of the cylindrical antenna coil is disposed so as to be substantially parallel to the mounting surface of the mounting member, the restriction on the directionality of the transmission / reception sensitivity can be eased.
【００７８】また、２つのＲＦＩＤタグのシリンダ状ア
ンテナコイルを、Ｌ字形状やＴ字形状、若しくは交差し
て配置した場合には構成が簡単で好ましい。Further, when the cylindrical antenna coils of the two RFID tags are arranged in an L-shape, a T-shape, or intersecting, the configuration is simple and preferable.
【００７９】また、固定手段が樹脂モールド体である場
合には、ＲＦＩＤタグの固定が容易で且つＲＦＩＤタグ
への外力に対する保護が出来、電磁波の伝播性も確保し
易い。When the fixing means is a resin molded body, the RFID tag can be easily fixed, can be protected from external force to the RFID tag, and the propagation of electromagnetic waves can be easily ensured.
【００８０】また、表面側に開口部を有する容器内にＲ
ＦＩＤタグが収容された場合には、外部からの応力や衝
撃に対して容器によりＲＦＩＤタグを保護することが出
来る。In a container having an opening on the surface side, R
When the FID tag is accommodated, the RFID tag can be protected by the container against external stress and impact.
【００８１】また、容器が非磁性材料で作られた場合に
は、ＲＦＩＤタグの取り付けが容易で電磁波の伝播性も
良好である。When the container is made of a non-magnetic material, the RFID tag can be easily attached and the propagation of electromagnetic waves is good.
【００８２】また、容器が導電性材料で作られ、該容器
の開口部が導電性材料で作られた蓋体で覆われ、該容器
と該蓋体との間、或いは該容器または該蓋体に磁束漏洩
路が形成された場合には、導電性材料で作られた容器と
蓋体との内部にＲＦＩＤタグを封入することにより、外
部からの応力や衝撃に対して一層強いものとなり、且つ
磁束漏洩路を介して電磁波が漏洩し、ＲＦＩＤタグと外
部のリーダライタ端末機との間で電力送電媒体及び情報
通信媒体である交流磁界を相互に送受信することが出来
る。Further, the container is made of a conductive material, and the opening of the container is covered with a lid made of a conductive material, and between the container and the lid, or between the container and the lid. In the case where a magnetic flux leakage path is formed in the container, the RFID tag is sealed inside the container and the lid made of a conductive material, so that it is more resistant to external stress and impact, and Electromagnetic waves leak through the magnetic flux leakage path, so that an AC magnetic field, which is a power transmission medium and an information communication medium, can be transmitted and received between the RFID tag and an external reader / writer terminal.
【００８３】また、ＲＦＩＤタグがＡＳＫ方式で電磁波
の送受信が可能なシリンダ状アンテナコイルと、制御部
とを有する場合には、導電性部材からの影響をより少な
くすることが出来る。When the RFID tag has a cylindrical antenna coil capable of transmitting and receiving electromagnetic waves by the ASK method and a control unit, the influence of the conductive member can be further reduced.
【００８４】また、本発明に係るＲＦＩＤタグ構造体の
取付構造によれば、シリンダ状アンテナコイルを有する
ＲＦＩＤタグを導電性部材に取り付けても漏洩電磁波を
利用して該導電性部材の影響を回避して良好な送受信が
可能である。Further, according to the mounting structure of the RFID tag structure according to the present invention, even when the RFID tag having the cylindrical antenna coil is mounted on the conductive member, the influence of the conductive member is avoided by utilizing the leakage electromagnetic wave. And good transmission and reception are possible.
【図１】本発明に係るＲＦＩＤタグ構造体に採用される
ＲＦＩＤタグ単体の構成を示す図である。FIG. 1 is a diagram showing a configuration of a single RFID tag employed in an RFID tag structure according to the present invention.
【図２】本発明に係るＲＦＩＤタグ構造体に採用される
ＲＦＩＤタグ単体の制御系の構成を示すブロック図であ
る。FIG. 2 is a block diagram showing a configuration of a control system of the RFID tag alone employed in the RFID tag structure according to the present invention.
【図３】（ａ），（ｂ）は２つのＲＦＩＤタグのシリン
ダ状アンテナコイルがＬ字形状に配置して樹脂モールド
により固定された本発明に係るＲＦＩＤタグ構造体の構
成を示す平面図及び側面図である。FIGS. 3A and 3B are plan views showing the configuration of an RFID tag structure according to the present invention in which cylindrical antenna coils of two RFID tags are arranged in an L shape and fixed by resin molding; It is a side view.
【図４】図３のＲＦＩＤタグ構造体のアンテナコイルに
発生する磁界の様子を示す図である。FIG. 4 is a diagram illustrating a state of a magnetic field generated in an antenna coil of the RFID tag structure of FIG. 3;
【図５】（ａ），（ｂ）は２つのＲＦＩＤタグのシリン
ダ状アンテナコイルがＴ字形状に配置して樹脂モールド
により固定された本発明に係るＲＦＩＤタグ構造体の構
成を示す平面図及び側面図である。FIGS. 5A and 5B are plan views showing the configuration of an RFID tag structure according to the present invention in which cylindrical antenna coils of two RFID tags are arranged in a T-shape and fixed by resin molding; It is a side view.
【図６】（ａ），（ｂ）は２つのＲＦＩＤタグのシリン
ダ状アンテナコイルが交差して配置して樹脂モールドに
より固定された本発明に係るＲＦＩＤタグ構造体の構成
を示す平面図及び側面図である。FIGS. 6A and 6B are a plan view and a side view showing a configuration of an RFID tag structure according to the present invention in which cylindrical antenna coils of two RFID tags are arranged to cross each other and fixed by resin molding; FIG.
【図７】収容容器内に２つのＲＦＩＤタグのシリンダ状
アンテナコイルをＬ字形状に配置して収容し、樹脂モー
ルドにより固定した後、収容容器の開口部に蓋体を接着
して閉鎖した構成を示す断面説明図である。FIG. 7 shows a configuration in which cylindrical antenna coils of two RFID tags are arranged and accommodated in an L-shape in an accommodation container, fixed by resin molding, and then closed by bonding a lid to an opening of the accommodation container. FIG.
【図８】収容容器内に２つのＲＦＩＤタグのシリンダ状
アンテナコイルをＬ字形状に配置して収容し、樹脂モー
ルドにより固定した後、収容容器の開口部に蓋体を螺着
して閉鎖した構成を示す断面説明図である。FIG. 8 shows an arrangement in which cylindrical antenna coils of two RFID tags are arranged and accommodated in an L-shape in an accommodation container, fixed by resin molding, and closed by screwing a lid to an opening of the accommodation container. FIG. 3 is an explanatory cross-sectional view showing a configuration.
【図９】図７に示す蓋体を省略して収容容器内に２つの
ＲＦＩＤタグのシリンダ状アンテナコイルをＬ字形状に
配置して収容し、樹脂モールドにより固定した構成を示
す断面説明図である。FIG. 9 is a cross-sectional explanatory view showing a configuration in which the cylindrical antenna coils of two RFID tags are arranged and accommodated in an L-shape in an accommodation container with the lid illustrated in FIG. 7 omitted, and fixed by resin molding; is there.
【図10】図３に示す樹脂モールドしたＲＦＩＤタグ構造
体を取付部材の溝部内に収容して樹脂封止した構成を示
す断面説明図である。10 is a cross-sectional explanatory view showing a configuration in which the resin-molded RFID tag structure shown in FIG. 3 is accommodated in a groove of a mounting member and sealed with a resin.
１…ＲＦＩＤタグ ２…アンテナコイル ３…コア部材 ４…半導体ＩＣチップ ４ａ…ＣＰＵ ４ｂ…メモリ ４ｃ…送受信機 ４ｄ…コンデンサ ５…樹脂モールド体 ６…収容容器 ７…蓋体 ８…取付部材 ８ａ…溝部 ８ｂ…取付面 ９…樹脂 Ａ…ＲＦＩＤタグ構造体 Ｂ…容器 Ｈ…磁界 DESCRIPTION OF SYMBOLS 1 ... RFID tag 2 ... Antenna coil 3 ... Core member 4 ... Semiconductor IC chip 4a ... CPU 4b ... Memory 4c ... Transceiver 4d ... Capacitor 5 ... Resin molded body 6 ... Container 7 ... Lid 8 ... Mounting member 8a ... Groove 8b: Mounting surface 9: Resin A: RFID tag structure B: Container H: Magnetic field
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｑ 23/00 Ｈ０４Ｂ 5/02 Ｈ０４Ｂ 1/59 Ｇ０６Ｋ 19/00 Ｈ 5/02 Ｋ (72)発明者 藤井 潤 東京都新宿区西新宿１丁目22番２号 羽田 ヒューム管株式会社内 (72)発明者 内山 知樹 東京都新宿区西新宿１丁目22番２号 羽田 ヒューム管株式会社内 (72)発明者 木田 茂 東京都新宿区西新宿１丁目22番２号 羽田 ヒューム管株式会社内 Ｆターム(参考） 5B035 BB09 CA23 5J021 AA02 AA11 AB04 CA06 FA13 FA30 GA01 JA00 5J046 AA04 AB12 QA02 5J047 AA04 AB12 FB02 FB08 FB12 5K012 AA01 AA02 AB06 AB12 AB19 AC06 AC07 AE08 BA02 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01Q 23/00 H04B 5/02 H04B 1/59 G06K 19/00 H 5/02 K (72) Inventor Fujii Jun 1-22-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Haneda Hume Pipe Co., Ltd. (72) Inventor Tomoki Uchiyama 1-22-2-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Haneda Hume Pipe Co., Ltd. (72) Inventor Kida Shigeru 1-22-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo F-term (reference) in Haneda Hume Tube Co., Ltd. AB12 AB19 AC06 AC07 AE08 BA02
Claims (9)
いに略直交に配置した２つのＲＦＩＤタグを固定手段に
より互いに固定したことを特徴とするＲＦＩＤタグ構造
体。1. An RFID tag structure wherein two RFID tags, each having an axial direction of a cylindrical antenna coil arranged substantially orthogonal to each other, are fixed to each other by fixing means.
ンテナコイルがＬ字形状またはＴ字形状に配置される
か、若しくは交差して配置されたことを特徴とする請求
項１に記載のＲＦＩＤタグ構造体。2. The RFID tag structure according to claim 1, wherein the cylindrical antenna coils of the two RFID tags are arranged in an L shape or a T shape, or are arranged so as to intersect. body.
とを特徴とする請求項１または請求項２に記載のＲＦＩ
Ｄタグ構造体。3. The RFI according to claim 1, wherein said fixing means is a resin mold body.
D tag structure.
ＦＩＤタグが収容されたことを特徴とする請求項１〜３
のいずれか１項に記載のＲＦＩＤタグ構造体。4. The container according to claim 1, wherein said container has an opening on its front side.
The FID tag is accommodated therein.
The RFID tag structure according to any one of the above.
特徴とする請求項４に記載のＲＦＩＤタグ構造体。5. The RFID tag structure according to claim 4, wherein the container is made of a non-magnetic material.
の開口部が導電性材料で作られた蓋体で覆われ、該容器
と該蓋体との間、或いは該容器または該蓋体に磁束漏洩
路が形成されたことを特徴とする請求項４に記載のＲＦ
ＩＤタグ構造体。6. The container is made of a conductive material, and an opening of the container is covered with a lid made of a conductive material, between the container and the lid, or the container or the lid. 5. The RF according to claim 4, wherein a magnetic flux leakage path is formed in the body.
ID tag structure.
の送受信が可能なシリンダ状アンテナコイルと、制御部
とを有することを特徴とする請求項１〜６のいずれか１
項に記載のＲＦＩＤタグ構造体。7. The RFID tag according to claim 1, wherein the RFID tag has a cylindrical antenna coil capable of transmitting and receiving electromagnetic waves in an ASK system, and a control unit.
Item 7. The RFID tag structure according to item 1.
ＦＩＤタグ構造体の取付部材への取付構造であって、 前記２つのＲＦＩＤタグのシリンダ状アンテナコイルの
軸方向が前記取付部材の取付面に対して略平行になるよ
うに取り付けたことを特徴とするＲＦＩＤタグ構造体の
取付構造。8. The R according to claim 1, wherein
A mounting structure of a FID tag structure to a mounting member, wherein the two RFID tags are mounted such that an axial direction of a cylindrical antenna coil of the two RFID tags is substantially parallel to a mounting surface of the mounting member. Mounting structure of the RFID tag structure to be used.
特徴とする請求項８に記載のＲＦＩＤタグ構造体の取付
構造。9. The mounting structure for an RFID tag structure according to claim 8, wherein the mounting member is a conductive member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000383520A JP2002183695A (en) | 2000-12-18 | 2000-12-18 | Rfid tag structure and installing structure therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000383520A JP2002183695A (en) | 2000-12-18 | 2000-12-18 | Rfid tag structure and installing structure therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002183695A true JP2002183695A (en) | 2002-06-28 |
Family
ID=18851162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000383520A Pending JP2002183695A (en) | 2000-12-18 | 2000-12-18 | Rfid tag structure and installing structure therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002183695A (en) |
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