JP2002063557A - Tag for rfid - Google Patents

Tag for rfid

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Publication number
JP2002063557A
JP2002063557A JP2000249282A JP2000249282A JP2002063557A JP 2002063557 A JP2002063557 A JP 2002063557A JP 2000249282 A JP2000249282 A JP 2000249282A JP 2000249282 A JP2000249282 A JP 2000249282A JP 2002063557 A JP2002063557 A JP 2002063557A
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Prior art keywords
core member
magnetic core
article
antenna coil
coil
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Pending
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JP2000249282A
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Japanese (ja)
Inventor
Takanori Endo
Seiro Hachiman
誠朗 八幡
貴則 遠藤
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Mitsubishi Materials Corp
三菱マテリアル株式会社
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Abstract

PROBLEM TO BE SOLVED: To prevent an antenna coil from coming into contact with a things around it during the conveyance of an article by forming the antenna coil extremely thin. SOLUTION: An IC chip 13 fitted to the article 11 with different information unique to the article 11 stored in it and the antenna coil 14 fitted to the article 11 is electrically connected to the IC chip 13. The antenna coil 14 has a magnetic core member 14a which is formed of a magnetic material in a flat plate shape and a coil main body 14b which is wound spirally around the magnetic core member 14a on an axis extending in the plane of the magnetic core member 14a. The magnetic core member 14a is formed of a composite material of magnetic powder and plastic or a laminated material of amorphous foil and the IC chip 13 is adhered to the top surface of the magnetic core member 14a.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、RFID(無線周波数識別:Radio Frequency Identification)技術を用いたタグに関する。 The present invention relates to the, RFID (Radio Frequency Identification: Radio Frequency Identification) regarding tag using the technique. 更に詳しくは物品に取付けられ、この物品の在庫管理や工程管理等に適したRFID用タグに関するものである。 More specifically attached to an article, to a RFID tag that is suitable for inventory management and process management, etc. of the article.

【0002】 [0002]

【従来の技術】従来、フェライト等により棒状に形成された磁芯部材にこの磁芯部材の軸線を中心として螺旋状にコイル本体を巻回したアンテナコイルと、このアンテナコイルのコイル本体に電気的に接続され管理対象の物品に関する情報が記憶されたICチップとを備えたタグが知られている。 Conventionally, an antenna coil wound coil body spirally around the axis of the magnetic core member in the magnetic core member which is formed into a rod by ferrite, electrically to the coil body of the antenna coil information about the articles connected managed there is tag with an IC chip stored known. このタグでは、管理対象の物品が金属により形成されている場合、金属製の物品の影響を受けるのを回避するため、タグと物品との間に厚さが5〜1 This tag if articles to be managed are formed of a metal, in order to avoid influence of metallic articles, the thickness between the tag and the article is 5-1
0mmであって電気絶縁性を有するスペーサを挿入した状態で、タグをビス等を用いて物品に固定していた。 While inserting a spacer having an electrically insulating a 0 mm, the tag has been secured to an article using screws or the like.

【0003】 [0003]

【発明が解決しようとする課題】しかし、上記従来のタグでは、磁芯部材の直径が比較的大きく、金属製の物品とアンテナコイルとの間隔が比較的大きいため、アンテナコイルが管理対象の物品から大きく突出する不具合があった。 [SUMMARY OF THE INVENTION However, in the conventional tag, the diameter of the magnetic core member is relatively large, due to the relatively large distance between the metal article and the antenna coil, the antenna coil of the managed article there is a problem that protrudes greatly from. このため、物品の搬送中にアンテナコイルが周囲の物に接触するおそれがあった。 Therefore, the antenna coil there is a risk of contact with the things around during transportation of the article. 本発明の第1の目的は、アンテナコイルを極めて薄く形成でき、これにより物品の搬送中にアンテナコイルが周囲の物に接触するのを防止できる、RFID用タグを提供することにある。 A first object of the present invention, the antenna coil can extremely thin, thereby preventing the antenna coil during the transport of the article in contact with the things around is to provide a tag for RFID.
本発明の第2の目的は、電波の発信源とアンテナコイルとの距離が比較的大きくても、アンテナコイルの中心を通る磁束密度を大きくすることができ、これによりタグを十分に活性化できる、RFID用タグを提供することにある。 A second object of the present invention, even if a relatively large distance between the source and the antenna coil of a radio wave, the magnetic flux density passing through the center of the antenna coil can be increased, thereby sufficiently activated tags to provide a tag for RFID.

【0004】 [0004]

【課題を解決するための手段】請求項1に係る発明は、 Means for Solving the Problems The invention according to claim 1,
図1及び図2に示すように、物品11に取付けられかつ物品11毎に異なる固有の情報が記憶されたICチップ13と、物品11に取付けられかつICチップ13に電気的に接続されたアンテナコイル14とを備えたRFI As shown in FIGS. 1 and 2, the IC chip 13 specific information different for each attached and article 11 to the article 11 is stored, an antenna which is electrically connected to the mounted and IC chip 13 to the article 11 RFI that includes a coil 14
D用タグの改良である。 It is an improvement of the tag D. その特徴ある構成は、アンテナコイル14が磁性材料により平板状に形成された磁芯部材14aと、磁芯部材14aにこの磁芯部材14aの平面内に延びる軸線を中心として螺旋状に巻回されたコイル本体14bとを有し、磁芯部材14aが磁性粉及びプラスチックの複合材又はアモルファス箔の積層材により形成され、ICチップ13が磁芯部材14aの表面に接着されるか或いは磁芯部材14aの近傍に設けられたところにある。 Its characteristic configuration is an antenna coil 14 and the magnetic core member 14a which is formed in a flat plate shape of a magnetic material, it is wound helically around an axis extending in the plane of the magnetic core member 14a to the magnetic core member 14a and a coil body 14b has, the magnetic core member 14a is formed by the laminate of the composite or amorphous foil of magnetic powder and plastic, or the magnetic core member IC chip 13 is adhered to the surface of the magnetic core member 14a there is to provided in the vicinity of 14a. この請求項1に記載されたRFID用タグでは、タグ12に向って電波を発信すると、タグ12が共振し、ICチップ13が活性化するので、ICチップ13に記憶されている固有の情報がアンテナコイル14 The RFID tag described in this claim 1 and transmits the radio waves toward the tag 12, the tag 12 resonates, since the IC chip 13 is activated, a unique information stored in the IC chip 13 antenna coil 14
から再発信される。 It is re-transmitted from. またアンテナコイル14を極めて薄く形成できるので、物品11の搬送中にアンテナコイル14が周囲の物に接触するのを防止できる。 Since it extremely thin antenna coil 14, it is possible to prevent the antenna coil 14 during the conveyance of the article 11 comes into contact with the things around.

【0005】請求項2に係る発明は、図7及び図8に示すように、物品11に取付けられかつ物品11毎に異なる固有の情報が記憶されたICチップ13と、物品11 [0005] The invention according to claim 2, as shown in FIGS. 7 and 8, the IC chip 13 specific information different for each attached and article 11 to the article 11 is stored, the article 11
に取付けられかつICチップ13に電気的に接続されたアンテナコイル64とを備えたRFID用タグの改良である。 It is an improvement of the RFID tag having an antenna coil 64 which is electrically connected to and IC chip 13 mounted on. その特徴ある構成は、アンテナコイル64が磁性材料により平板状に形成された磁芯部材64aと、磁芯部材64aの外周縁を囲むように磁芯部材64aと同一平面上に渦巻き状に巻回されたコイル本体64bとを有し、磁芯部材64aが磁性粉及びプラスチックの複合材又はアモルファス箔の積層材により形成され、ICチップ13が磁芯部材64aの表面に接着されたところにある。 Its characteristic configuration is wound a magnetic core member 64a of the antenna coil 64 is formed in a flat plate shape of a magnetic material, a spiral form on the magnetic core member 64a flush so as to surround the outer periphery of the magnetic core member 64a is a coil body 64b was, the magnetic core member 64a is formed by the laminate of the composite or amorphous foil of magnetic powder and plastic, IC chip 13 is in place that is adhered to the surface of the magnetic core member 64a. この請求項2に記載されたRFID用タグでは、タグ62に向って電波を発信すると、電波の発信源とアンテナコイル64との距離が比較的大きくても、磁芯部材64aによりコイル本体64bの中心を通る磁束密度(この磁束は上記電波により発生する。)が増大する。 The RFID tag described in claim 2, when transmitting a radio wave toward the tag 62, even if the distance between the source and the antenna coil 64 of the electromagnetic wave is relatively large, the coil body 64b by the magnetic core member 64a flux density passing through the center (the magnetic flux is generated by the radio wave.) increases.
この結果、アンテナコイル64を含む共振回路の共振の振幅が大きくなるので、タグ62を十分に活性化でき、 As a result, the amplitude of the resonance of the resonance circuit including the antenna coil 64 increases, can be sufficiently activated tag 62,
ICチップ13に記憶されている固有の情報がアンテナコイル64から再発信される。 Specific information stored in the IC chip 13 is re-transmitted from the antenna coil 64. また磁性粉の粒径をdμ The dμ the particle size of the magnetic powder
mとし、アンテナコイルの共振周波数をfMHzとするときに、d×f 0.5が20以下となるように磁性粉の粒径を選定することが好ましく、磁性粉及びプラスチックの複合材を射出成形又は圧縮成形することにより磁芯部材を形成することが好ましい。 and m, when the fMHz the resonant frequency of the antenna coil, it is preferable that d × f 0.5 is selected particle size of the magnetic powder so that 20 or less, injection molding or compression of the magnetic powder and composite plastic it is preferable to form the magnetic core member by molding.

【0006】請求項5に係る発明は、請求項1又は2に係る発明であって、更に図5及び図6に示すように、アンテナコイル14が取付けられる物品41のコイル取付面41aとアンテナコイル14との間に導電性材料により形成された導電板43が介装されたことを特徴とする。 [0006] The invention according to claim 5 is the invention according to claim 1 or 2, further shown in FIGS. 5 and 6, the coil mounting surface 41a and the antenna coil of the article 41 of the antenna coil 14 is mounted conductive plate 43 formed of a conductive material, characterized in that interposed between the 14. この請求項5に記載されたRFID用タグでは、金属により形成された物品41のコイル取付面41aにアンテナコイル14を取付けた状態で、タグ12に向って電波を発信すると、導電板43がコイル取付面41aへの電波の通過を遮蔽するため、コイル取付面41aには渦電流が発生しない。 In the RFID tag according to claim 5, the coil mounting surface 41a of the article 41 formed by a metal in a state of attaching the antenna coil 14 and transmits radio waves toward the tags 12, the conductive plate 43 is a coil to shield the radio wave passage of the mounting surface 41a, eddy currents are not generated in the coil mounting surface 41a. この結果、タグ12が共振し、I As a result, tag 12 resonates, I
Cチップ13が活性化するので、ICチップ13に記憶されている固有の情報がアンテナコイル14から再発信される。 Since C chip 13 is activated, the unique information stored in the IC chip 13 is re-transmitted from the antenna coil 14. また物品41のコイル取付面41aが金属により形成されていても、アンテナコイル14を極めて薄く形成できるので、物品41の搬送中にアンテナコイル1 Also even if the coil mounting surface 41a of the article 41 has been formed by a metal, it is possible to extremely thin the antenna coil 14, the antenna coil 1 during transport of the article 41
4が周囲の物に接触するのを防止できる。 4 can be prevented from contacting the object around. 更に導電板の固有抵抗は1.59×10 -6 〜8×10 -6 Ω・cmであることが好ましく、導電板の厚さは0.01〜2mmであることが好ましい。 More preferably the resistivity of the conductive plate is 1.59 × 10 -6 ~8 × 10 -6 Ω · cm, the thickness of the conductive plate is preferably 0.01 to 2 mm.

【0007】請求項8に係る発明は、請求項1ないし7 [0007] The invention according to claim 8, claims 1 7
いずれかに係る発明であって、更に図1に示すように、 A present invention according to any one, as further shown in FIG. 1,
RFID用タグ12が物品11に接着剤により又は両面粘着テープを介して取付けられたことを特徴とする。 RFID tag 12 is characterized in that mounted or via double-sided adhesive tape with an adhesive to the article 11. この請求項8に記載されたRFID用タグでは、タグ12 The RFID tag described in claim 8, the tag 12
を接着剤又は両面粘着テープを介して物品11に取付けても、タグ12の物品11からの突出量が極めて小さいため、その取付強度を十分に確保できる。 Also be attached to the article 11 through an adhesive or double-sided adhesive tape, for projecting amount from the article 11 of the tag 12 is very small, the attaching strength can be sufficiently secured.

【0008】 [0008]

【発明の実施の形態】次に本発明の実施の形態を図面に基づいて説明する。 It will be described with reference DETAILED DESCRIPTION OF THE INVENTION Next embodiment of the present invention with reference to the drawings. 図1及び図2に示すように、物品1 As shown in FIGS. 1 and 2, the article 1
1の表面にはRFID用タグ12が取付けられる。 RFID tag 12 is attached to the first surface. このタグ12は物品11毎に異なる固有の情報が記憶されたICチップ13と、ICチップ13に電気的に接続されたアンテナコイル14とを備える。 The tag 12 includes an IC chip 13 that specific information different for each article 11 is stored, and an antenna coil 14 which is electrically connected to the IC chip 13. 物品11はこの実施の形態では倉庫に保管された修理用の部品であり、プラスチック等の非磁性かつ非導電性の材料により形成される。 The article 11 is a part for repairs that are stored in the warehouse in this embodiment, it is formed of a nonmagnetic and nonconductive material such as plastic. アンテナコイル14は磁性材料により平板状に形成された磁芯部材14aと、磁芯部材14aにこの磁芯部材14aの平面内に延びる軸線を中心として螺旋状に巻回されたコイル本体14bとを有する。 The antenna coil 14 and the magnetic core member 14a which is formed in a flat plate shape by a magnetic material and a coil body 14b wound helically around an axis extending in the plane of the magnetic core member 14a to the magnetic core member 14a a.

【0009】磁芯部材14aは金属又はフェライトの粉末又はフレークとプラスチックとの複合材により長方形板状に形成されるか、或いはFe系(アライドケミカル社製のMETGLAS2605S−2)やCo系(アライドケミカル社製のMETGLAS2714A)等のアモルファス箔の積層材により長方形板状に形成されることが好ましい。 [0009] The magnetic core member 14a is either formed in a rectangular plate shape by a composite material of a powder or flakes and plastic metal or ferrite, or a Fe-based (Allied Chemical Company METGLAS2605S-2) and Co-based (Allied Chemical is preferably formed in a rectangular plate shape by company manufactured METGLAS2714A) laminate of amorphous foil such. 上記プラスチックとしては加工性の良い熱可塑性のプラスチックを用いたり、或いは耐熱性の良い熱硬化性のプラスチックを用いたりすることができる。 As the plastic or can use or using a good workability thermoplastic plastic, or heat resistance good thermoset plastics. また上記金属の粉末としては、カーボニル鉄粉末, As the powder of the metal, carbonyl iron powder,
鉄−パーマロイ等のアトマイズ粉末,還元鉄粉末等が用いられる。 Iron - atomized powder such as permalloy, reduced iron powder or the like is used. 一方、金属のフレークとしては、上記粉末をボールミル等で微細化して粉末を成形した後に、この粉末を機械的に扁平化して得られたフレークや、鉄系又はコバルト系アモルファス合金の溶湯粒を水冷銅に衝突させて得られたフレークが用いられる。 On the other hand, as flakes of metal, after forming the powder finer the powder in a ball mill or the like, flakes or obtained by mechanically flattening the powder, the molten metal particles of iron-based or cobalt-based amorphous alloy cooled flakes obtained by colliding with copper.

【0010】また磁芯部材14aは磁性粉の粒径をdμ [0010] The magnetic core member 14a is dμ the particle size of the magnetic powder
mとし、アンテナコイルの共振周波数をfMHzとするときに、d×f 0.5が20以下、好ましくは10以下となるように磁性粉の粒径dμmを選定して形成される。 and m, when the fMHz the resonant frequency of the antenna coil, d × f 0.5 20 or less, preferably by selecting a particle size dμm the magnetic powder so as to be 10 or less formed.
また磁芯部材14aは磁性粉及びプラスチックの複合材を射出成形又は圧縮成形することにより形成されることが好ましい。 The magnetic core member 14a is preferably formed by injection molding or compression molding a composite material of magnetic powder and plastic. このように形成された磁芯部材14aは脆弱なフェライトにより形成された磁芯部材と比較して、 The thus formed magnetic core member 14a is compared with the magnetic core member which is formed by fragile ferrite,
強靱であるため薄くしても割れ難い。 Hard to crack be thinned because it is tough. また磁性粉がプラスチックに分散されている、即ち磁性粉がプラスチックにより相互に絶縁されているため、磁芯部材14a全体としては導電性を有せず、高周波の電波を受けても渦電流は発生しない。 The magnetic powder is dispersed in the plastic, that is, the magnetic powder are insulated from each other by a plastic, does not have a conductivity as a whole magnetic core member 14a, eddy currents even under radio wave frequency is generated do not do.

【0011】一方、磁性粉自体は導電体であるため、磁性粉の粒径及び電波の周波数によって磁性粉に渦電流が発生しない領域の限界が存在する。 Meanwhile, since the magnetic powder itself is a conductor, eddy currents are present is a limit region that does not occur in the magnetic powder by the size and frequency of the radio wave of the magnetic powder. この限界を理論的考察と実験により次のように求めた。 It was obtained as follows by experiment this limit and theoretical considerations. 先ずアンテナコイル14の磁芯部材14aをカーボニル鉄粉(平均粒径3μ First magnetic core member 14a of the carbonyl iron powder of the antenna coil 14 (average particle size 3μ
m)92重量%とナイロン樹脂8重量%との複合材を射出成形することにより、長さ×幅×厚さが45×15× m) by injection molding a composite material with 92% by weight of nylon resin 8 wt%, is 45 × 15 × length × width × thickness
1.5mmの板状となるように形成した。 It was formed to a 1.5mm plate. またアンテナコイル14のコイル本体14bとして線径が0.3mm The wire diameter as a coil body 14b of the antenna coil 14 is 0.3mm
の被覆導線を上記磁芯部材14aにその長手方向に延びる軸線を中心として螺旋状に15回巻いて形成した。 The coated conductor was formed by winding 15 times spirally about an axis extending in the longitudinal direction of the magnetic core member 14a. これを第1のアンテナコイルとした。 This was the first antenna coil. 次に磁芯部材14a Then the magnetic core member 14a
のカーボニル鉄粉として平均粒径が40μmのものを用い、かつ磁芯部材への被覆導線の巻数が300回であることを除いて、上記と同様にしてアンテナコイル14を作製し、このアンテナコイルを第2のアンテナコイルとした。 The average particle size with that of 40μm as carbonyl iron powder, and except that the number of turns of insulated conductive wires to the magnetic core member is 300 times, to prepare an antenna coil 14 in the same manner as described above, the antenna coil It was used as a second antenna coil. 更に上記第1及び第2のアンテナコイルに、0. Further to the first and second antenna coils, 0.
1MHz〜20MHzの範囲で周波数を変化させた電波を発信し、d×f 0.5を算出するとともに、第1及び第2のアンテナコイル14の自己インダクタンスL及び抵抗値rをそれぞれ測定した。 It transmits radio waves of varying frequency from 1MHz~20MHz, to calculate the d × f 0.5, and the self-inductance L and the resistance value r of the first and second antenna coil 14 were measured. 表1にその結果を示した。 The results are shown in Table 1.

【0012】 [0012]

【表1】 [Table 1]

【0013】表1から明らかなように、d×f 0.5が2 [0013] As apparent from Table 1, d × f 0.5 2
0を越えたところから抵抗値rが急激に上昇し始めたため、d×f 0.5は20以下であれば良いことが判った。 0 the resistance value r began to rise sharply from beyond the, d × f 0.5 was found to be sufficient if 20 or less.
タグ12はプラスチック製のケース16に封入される。 Tag 12 is encapsulated in a plastic case 16.
このケース16は表面にコイル本体14b及びICチップ13が接着されたケース本体16aと、タグ12を覆うようにケース本体16aに嵌着された蓋16bとを有する。 The case 16 has a case body 16a that the coil body 14b and the IC chip 13 is adhered to the surface, and a lid 16b that is fitted to the case body 16a to cover the tag 12.

【0014】ICチップ13は図4に示すように、電源回路13aと、無線周波数(RF)回路13bと、変調回路13cと、復調回路13dと、CPU13eと、このCPU13eに接続され物品11に固有の情報が記憶されるメモリ13fとを有する。 [0014] IC chip 13 as shown in FIG. 4, a power supply circuit 13a, natural and radio frequency (RF) circuit 13b, a modulator circuit 13c, a demodulator circuit 13d, and CPU13e, the article 11 is connected to the CPU13e and a memory 13f which information is stored. 電源回路13aはコンデンサ(図示せず)を内蔵し、このコンデンサはアンテナコイル14とともに共振回路を形成する。 The power supply circuit 13a has a built-in capacitor (not shown), this capacitor forms a resonant circuit together with the antenna coil 14. このコンデンサにはアンテナコイル14が特定の周波数の電波(上記共振回路が共振する周波数)を受信したときにその相互誘導作用で生じる電力が充電される。 This is the condenser antenna coil 14 is the power generated by the mutual induction upon receiving a radio wave of a specific frequency (the frequency which the resonant circuit resonates) is charged. 電源回路13a The power supply circuit 13a
はこの電力を整流し安定化してCPU13eに供給し、 Supplied to CPU13e by stabilizing rectifies this power,
ICチップ13を活性化する。 The IC chip 13 is activated. メモリ13fはROM Memory 13f is ROM
(read only memory)、RAM(ramdom-access memor (Read only memory), RAM (ramdom-access memor
y)及びEEPROM(electrically erasable program y) and EEPROM (electrically erasable program
mable read only memory)を含み、CPU13eの制御の下で後述する識別手段17(図3及び図4)からの電波のデータ通信による読出しコマンドに応じて記憶されたデータの読出しを行うとともに、識別手段17からの書込みコマンドに応じてデータの書込みが行われる。 Includes mable read only memory), performs reading of the stored data in response to a read command by the data communication of a radio wave from the identification means 17 to be described later under the control of CPU13e (FIGS. 3 and 4), identifying means data write is performed in response to a write command from the 17.

【0015】上記ICチップ13のメモリ13fに記憶された物品11固有の情報は図3及び図4に示すように、送受信アンテナ18を有する識別手段17により取出される。 [0015] The article 11 unique information stored in the memory 13f of the IC chip 13 as shown in FIGS. 3 and 4, is taken out by the identification means 17 having a transmitting and receiving antenna 18. 識別手段17はICチップ13のメモリ13 Memory 13 of the identification unit 17 is the IC chip 13
fに記憶された情報を読出しかつICチップ13のメモリ13fに情報を書込むように構成され、アンテナコイル14と相互誘導作用する送受信アンテナ18と、送受信アンテナ18から電波を発信しかつ送受信アンテナ1 And reads the information stored in the f configured to write information in the memory 13f of the IC chip 13, a transmission and reception antenna 18 for mutual induction with the antenna coil 14, and transmits radio waves from the transmitting and receiving antenna 18 and receiving antenna 1
8の受けた電波を処理する処理部19と、ICチップ1 A processing unit 19 for processing the radio wave received in 8, IC chip 1
3のメモリ13fに記憶された情報を表示する表示部2 Displaying three memory 13f information stored in the display unit 2
1とを有する。 Having one and. 送受信アンテナ19は物品11に取付けられたタグ12のアンテナコイル14に電波を発信しかつそのアンテナコイル14からの電波を受信可能に構成される。 Transmitting and receiving antenna 19 is received configured to allow radio waves from the antenna coil 14 to transmits radio waves and the antenna coil 14 of the tag 12 attached to the article 11. また処理部19は送受信アンテナ18に接続され、バッテリを内蔵する電源回路19aと、無線周波数(RF)回路19bと、変調回路19cと、復調回路1 The processor 19 is connected to the transmission and reception antenna 18, a power supply circuit 19a having a built-in battery, a radio frequency (RF) circuit 19b, a modulator circuit 19c, a demodulation circuit 1
9dと、CPU19eと、このCPUに接続されICチップ13から読取った情報を記憶するメモリ19fとを有する。 It has a 9d, and CPU19e, and a memory 19f for storing information read from the connected to the CPU IC chip 13. また処理部19のCPU19eには入力部19 The input unit 19 to CPU19e processing unit 19
gが接続され、この入力部19gにより入力された情報はICチップ13のメモリ19fに書込み可能に構成される。 g is connected, the information input by the input unit 19g is writable configured in the memory 19f of the IC chip 13. 上記識別手段17は倉庫の管理者により持運び可能に構成される。 The identification means 17 is portable can be configured by the administrator of the warehouse. またICチップ13のメモリ13fにはその物品11の名称、材質、重量、成形年月日等が記憶される。 The name of the memory to 13f the article 11 of the IC chip 13, the material, weight, molding date, etc. are stored. 更に上記タグ12は図示しないが接着剤又は両面粘着テープを介して物品11の表面に取付けられる。 Furthermore the tag 12 is not shown is attached to the surface of the article 11 through an adhesive or double-sided adhesive tape.

【0016】このように構成されたRFID用タグ12 The tag 12 for the thus constructed RFID
の動作を説明する。 To explain the operation. 倉庫の管理者は識別手段17を用いて物品11をチェックする。 Warehouse administrator checks the article 11 using the identification means 17. 具体的には識別手段17の送受信アンテナ18をタグ12に近付け、送受信アンテナ18からタグ12のアンテナコイル14に向けて2値化されたデジタル信号の質問信号を特定周波数の電波により送信する。 Specifically close the receiving antenna 18 of the identifying means 17 to the tag 12, and transmits the interrogation signal of the binarized digital signal to the transmitting and receiving antenna 18 to the antenna coil 14 of the tag 12 by a radio wave of a specific frequency. 識別手段17から発せられるデジタル信号は、図示しない信号発生器から発せられ変調回路19 Digital signal emitted from the identification means 17, emitted from the signal generator (not shown) modulation circuit 19
cで変調を受け、RF回路19bでこの変調した信号を増幅して送受信アンテナ18から送信される。 Being modulated by c, it is transmitted from the transceiver antenna 18 and amplifies the modulated signal by the RF circuit 19b. この変調には例えばASK(振幅変調)、FSK(周波数変調) This modulation e.g. ASK (amplitude modulation), FSK (frequency modulation)
又はPSK(位相変調)が挙げられる。 Or PSK (phase modulation) and the like. 送信された質問信号の電波はタグ12のアンテナコイル14に受信される。 Radio waves transmitted interrogation signal is received by the antenna coil 14 of the tag 12.

【0017】このため、アンテナコイル14と電源回路13aのコンデンサとにより構成される共振回路の共振の振幅が大きくなるので、このコンデンサには十分な量の電力が充電される、即ち送受信アンテナ18とアンテナコイル14の相互誘導作用により十分な量の電力が電源回路13aのコンデンサに充電される。 [0017] Therefore, the amplitude of the resonance of the resonant circuit composed by the capacitor of the antenna coil 14 and the power supply circuit 13a is increased, a sufficient amount of electric power is charged in the capacitor, i.e. the transmission and reception antenna 18 a sufficient amount of electric power is charged in the capacitor in the power circuit 13a by mutual induction action of the antenna coil 14. 電源回路13 The power supply circuit 13
aはこの電力を整流し安定化してCPU13eに供給し、ICチップ13を活性化し、更にRF回路13bを介して復調回路13dで元のデジタル信号の質問信号を再現させる。 a is supplied to CPU13e stabilizes rectifies this power, the IC chip 13 is activated, to reproduce an interrogation signal of the original digital signal by the demodulation circuit 13d further via the RF circuit 13b. CPU13eはこの質問信号に基づいてメモリ13fに書込まれていたその物品11に関する情報を送信する。 CPU13e transmits information about the article 11 which has been written in the memory 13f on the basis of the interrogation signal. この情報の送信は2値化されたデータ信号をICチップ13の変調回路13cで変調し、RF回路13bで増幅してアンテナコイル14から送出することにより行われる。 The transmission of information is performed by a binary data signal modulated by the modulation circuit 13c of the IC chip 13, and sends from the antenna coil 14 is amplified by the RF circuit 13b. 送信されたデータは識別手段17の送受信アンテナ18が受信し、処理部19はタグ12からの物品11固有の情報を表示部21に表示する。 The transmitted data received by the receiving antenna 18 of the identification means 17, processing unit 19 displays the article 11-specific information from the tag 12 on the display unit 21. 倉庫の管理者は表示部21に表示された情報を見てその物品1 The article warehouse administrator watching the information displayed on the display unit 21 1
1の保管場所を変更したり或いは工場に搬送したりして在庫管理する。 Inventory to manage or transported to the 1 of the storage location or modify or factory.

【0018】また管理者は識別手段17の入力部19g [0018] The input section 19g of the administrator identification means 17
から在庫管理した日付をICチップ13のメモリ13f Memory 13f of the IC chip 13 the date of the inventory management from
に書込む。 It is written in. 具体的には識別手段17の送受信アンテナ1 Reception of specifically identifying means 17 Antenna 1
8からタグ12のアンテナコイル14に向けて上記在庫管理した日付を特定周波数の電波により送信する。 8 toward the antenna coil 14 of the tag 12 from transmitting the radio wave of a specific frequency date of the inventory management. この情報は2値化されたデジタル信号として識別手段17から発せられる。 This information is generated from the identifying means 17 as the binary digital signal. このデジタル信号は、図示しない信号発生器から発せられ変調回路19cで変調を受け、RF回路19bでこの変調した信号を増幅して送受信アンテナ18から送信される。 This digital signal is subjected to modulation in the modulation circuit 19c emitted from the signal generator, not shown, it is transmitted from the transceiver antenna 18 and amplifies the modulated signal by the RF circuit 19b. 送信された電波はタグ12のアンテナコイル14に受信され、この受信により、電源回路13aのコンデンサには送受信アンテナ18とアンテナコイル14の相互誘導作用で生じる電力が充電される。 Transmitted radio wave is received by the antenna coil 14 of the tag 12, by the reception power caused by the mutual induction of the transmitting and receiving antenna 18 and the antenna coil 14 is charged in the capacitor of the power supply circuit 13a.
この結果、電源回路13aは電力を整流し安定化してC As a result, the power supply circuit 13a is stabilized rectified power C
PU13eに供給し、ICチップ13を活性化する。 Supplied to PU13e, activate the IC chip 13. 次にICチップ13のRF回路13bでは復調に必要な信号のみを取込み、復調回路13dで上記情報のデジタル信号を再現させて、CPU13eによりこのデジタル信号をメモリ13fに書込む。 Then the RF circuit 13b takes in only the signal necessary for demodulation in the IC chip 13, thereby reproducing the digital signal of the information by the demodulation circuit 13d, writes the digital signal in the memory 13f by CPU13e. なお、タグ12を接着剤又は両面粘着テープを介して物品11に取付けても、タグ12は極めて薄く物品11から極めて僅かしか突出しないため、その取付強度を十分に確保できる。 Even attaching the tag 12 to the article 11 through an adhesive or double-sided adhesive tape, the tag 12 since no extremely little protruded from very thin article 11, the attaching strength can be sufficiently secured.

【0019】図5及び図6は本発明の第2の実施の形態を示す。 [0019] Figures 5 and 6 show a second embodiment of the present invention. 図5及び図6において図1及び図2と同一符号は同一部品を示す。 5 and 6 the same reference numerals as in FIG. 1 and FIG. 2 shows the same parts. この実施の形態では、物品41のコイル取付面41aとアンテナコイル14との間に導電性材料により形成された導電板43が介装される。 In this embodiment, the conductive plate 43 formed of a conductive material is interposed between the coil mounting surface 41a and the antenna coil 14 of the article 41. 上記物品41はコイル取付面41aを含め鉄やステンレス鋼等の金属により形成される。 It said article 41 is formed by a metal such as iron or stainless steel, including the coil mounting surface 41a. 上記導電板43はケース本体16aより一回り大きく又は略同一に形成され、その固有抵抗は1.59×10 -6 〜8×10 -6 Ω・cm、好ましくは1.59×10 -6 〜3×10 -6 Ω・cmである。 The conductive plate 43 is formed slightly larger or substantially the same from case body 16a, the resistivity 1.59 × 10 -6 ~8 × 10 -6 Ω · cm, preferably 1.59 × 10 -6 ~ 3 is a × 10 -6 Ω · cm.
導電板43の固有抵抗を1.59×10 -6 〜8×10 The resistivity of the conductive plate 43 1.59 × 10 -6 ~8 × 10 -6 -6
Ω・cmの範囲に限定したのは次の実験による。 The reason for limiting the scope of the Ω · cm is due to the following experiment. アンテナコイル14の磁芯部材14aをカーボニル鉄粉(平均粒径3μm)92重量%とナイロン樹脂8重量%との複合材を射出成形することにより、長さ×幅×厚さが45 By injection molding the composite material of the magnetic core member 14a of the antenna coil 14 and carbonyl iron powder (average particle size 3 [mu] m) 92 wt% and 8 wt% of nylon resin, length × width × thickness 45
×15×1.5mmの板状となるように形成する。 × formed to a 15 × 1.5 mm plate. またアンテナコイル14のコイル本体14bとして線径が0.3mmの被覆導線を上記磁芯部材14aにその長手方向を軸線として螺旋状に15回巻いて形成する。 Also forming a coated conductive wire of wire diameter as a coil body 14b is 0.3mm antenna coil 14 is wound 15 times spirally to the longitudinal direction of the magnetic core member 14a as an axis line. 更に導電板43を銅、アルミニウム、黄銅、ステンレス鋼(SUS304)及び鉄(SS34)により長さ×幅× Further copper conductive plate 43, aluminum, brass, length × width × stainless steel (SUS304) and iron (SS34)
厚さが200×100×1mmとなるように形成する。 Thickness is formed to be 200 × 100 × 1mm.

【0020】次いで上記アンテナコイル14を導電板4 [0020] Then the conductive plates 4 and the antenna coil 14
3に接着しない状態で、電波の周波数を0.1MHz〜 In a state that does not adhere to 3, 0.1MHz~ the frequency of the radio wave
20MHzの範囲で変化させてアンテナコイル14のQ Q of the antenna coil 14 is varied in the range of 20MHz
0値をそれぞれ測定する。 0 value is measured, respectively. 次に各導電板43上に上記アンテナコイル14をそれぞれ接着した状態で、電波の周波数を0.1MHz〜20MHzの範囲で変化させてアンテナコイル14のQ 1値をそれぞれ測定する。 Then in a state where the antenna coil 14 on the conductive plate 43 and adhered respectively, by changing the frequency of the radio waves in the range of 0.1MHz~20MHz measuring each Q 1 value of the antenna coil 14. 更にQ 1 Furthermore, Q 1
/Q 0をそれぞれ算出する。 / Q 0 to be calculated. 表2に上記Q 1 /Q 0を各導電板43の固有抵抗とともに示す。 Table 2 shows the Q 1 / Q 0 with resistivity of each conductive plate 43. なお、Q値とは、上記電波の角周波数をωとし、アンテナコイル14及びコンデンサにて構成される共振回路の抵抗値をrとし、コイル本体14bの自己インダクタンスをLとするとき、 Note that the Q value, the angular frequency of the radio wave and omega, when the resistance value of the resonant circuit composed by the antenna coil 14 and a capacitor and r, the self-inductance of the coil body 14b is L,
ωL/rで定義される数値であり、Q値が高いほど渦電流等による損失が少なくなり、共振の幅が鋭くなることが知られている。 Is a numerical value defined by .omega.L / r, losses due to eddy currents and the like as the Q value is high is reduced, it is known that the width of the resonance becomes sharp.

【0021】 [0021]

【表2】 [Table 2]

【0022】表2から電波の周波数の変化に対してQ 1 [0022] Q 1 with respect to the change in the frequency of the radio waves from Table 2
/Q 0の変化の少ない導電板43は銅、アルミニウム及び黄銅であったため、導電板43の固有抵抗を1.59 / Conductive plate 43 little change in Q 0 is copper, because it was aluminum and brass, the resistivity of the conductive plate 43 1.59
×10 × 10 -6 〜8×10 -6 Ω・cmの範囲とし、更にQ 1 -6 to 8 × a range of 10 -6 Ω · cm, further Q 1 /
0の変化の少ない導電板43は銅及びアルミニウムであったため、好ましい導電板43の固有抵抗を1.59 Since the conductive plate 43 little change in Q 0 was copper and aluminum, the resistivity of the preferred conductive plate 43 1.59
×10 -6 〜3×10 -6 Ω・cmの範囲とした。 × ranged from 10 -6 ~3 × 10 -6 Ω · cm.

【0023】また導電板43の厚さは0.01〜2m [0023] The thickness of the conductive plate 43 0.01~2m
m、好ましくは0.05〜0.5mmである。 m, preferably 0.05~0.5mm. 導電板4 Conductive plate 4
3の厚さを0.05〜1mmの範囲に限定したのは次の実験による。 The third thickness is limited to a range of 0.05~1mm is due to the following experiments. アンテナコイル14の磁芯部材14aをカーボニル粉(平均粒径3μm)92重量%とナイロン樹脂8重量%との複合材を射出成形することにより、長さ×幅×厚さが45×15×1.5mmの板状となるように形成する。 Carbonyl powder magnetic core member 14a of the antenna coil 14 (average particle size 3 [mu] m) 92 wt% and by injection molding the composite material of the nylon resin 8 wt%, length × width × thickness 45 × 15 × 1 formed to a .5mm plate. またアンテナコイル14のコイル本体14 The coil body 14 of the antenna coil 14
bとして線径が0.3mmの被覆導線を上記磁芯部材1 Wire diameter as b is the the coated conductive wire of 0.3mm magnetic core member 1
4aにその長手方向を軸線として螺旋状に15回巻いて形成する。 Wound 15 times its longitudinal helically as an axis line 4a formed. 更に導電板43をアルミニウムにより縦×横が60×30mmであって厚さが10μm,20μm, Further the conductive plate 43 to a vertical × horizontal is 60 × 30 mm of aluminum thickness is 10 [mu] m, 20 [mu] m,
40μm,0.3mm,1mm及び2mmとなるようにそれぞれ形成する。 40 [mu] m, 0.3 mm, are respectively formed so that the 1mm and 2 mm. 次いで上記アンテナコイル14を上記各導電板43に接着した状態で(導電板43に接着しないアンテナコイル14も含む。)、電波の周波数を0.1MHz〜20MHzの範囲で変化させてアンテナコイル14の自己インダクタンスL 0をそれぞれ測定する。 Then the antenna coil 14 in a state of being bonded to each conductive plate 43 (including the antenna coil 14 that does not adhere to the conductive plate 43.), The antenna coil 14 by changing the frequency of the radio waves in the range of 0.1MHz~20MHz to measure the self-inductance L 0, respectively. 次に上記導電板43の下面に鉄板(厚さ3mm)を敷いた状態で、電波の周波数を0.1MHz〜20MH Next, in a state lined with iron (thickness 3mm) on the lower surface of the conductive plate 43, 0.1MHz~20MH the frequency of the radio wave
zの範囲で変化させてアンテナコイル14の自己インダクタンスL 1をそれぞれ測定する。 varied from z each measuring the self-inductance L 1 of the antenna coil 14. 更にL 1 /L 0をそれぞれ算出する。 Further calculates each L 1 / L 0. 表3に上記L 1 /L 0を示す。 Table 3 shows the L 1 / L 0.

【0024】 [0024]

【表3】 [Table 3]

【0025】表3から電波の周波数の変化に対してL 1 [0025] L 1 with respect to the change in the frequency of the radio waves from Table 3
/L 0が変化せずかつ100に近いことが要求されるため、導電板43の厚さは0.01mm以上であれば良いことが判った。 Because the / L 0 that is required close to and 100 unchanged, the thickness of the conductive plate 43 was found to be as long as 0.01mm or more. なお、現時点では厚さが0.01mm未満の導電板を入手することは困難であった。 The thickness was difficult to obtain the conductive plate of less than 0.01mm at the moment. またタグ4 The tag 4
2全体を薄くするため導電板43の厚さは2mm以下に設定される。 The thickness of the conductive plate 43 to thin the 2 whole is set to 2mm or less. この結果、導電板43の厚さを0.01〜 As a result, 0.01 the thickness of the conductive plate 43
2mmとした。 It was 2mm.

【0026】このように構成されたRFID用タグ12 The tag 12 for the thus constructed RFID
の動作を説明する。 To explain the operation. 金属により形成された物品41のコイル取付面41aにアンテナコイル14を取付けた状態で、識別手段の送受信アンテナからタグ12のアンテナコイル14に向って電波を発信すると、導電板43がコイル取付面41aへの電波の通過を遮蔽するため、コイル取付面41aには渦電流が発生しない。 The coil mounting surface 41a of the article 41 formed by a metal in a state of attaching the antenna coil 14 and transmits a radio wave toward the receiving antenna of the identification means to the antenna coil 14 of the tag 12, the conductive plate 43 is a coil mounting surface 41a to shield the radio wave passage of the eddy current is not generated in the coil mounting surface 41a. この結果、タグ12が共振するので、ICチップ13が活性化し、I As a result, the tag 12 resonates, IC chip 13 is activated, I
Cチップ13に記憶されている固有の情報がアンテナコイル14から送受信アンテナに向って再発信される。 Specific information stored in the C chip 13 is redialing toward the antenna coil 14 to the receiving antenna. これにより識別手段はICチップ13のメモリに記憶された情報を読出すことができる。 Thus the identification means can be read the information stored in the memory of the IC chip 13.

【0027】また識別手段によりICチップ13のメモリに情報を書込むときには、識別手段の送受信アンテナからタグ12のアンテナコイル14に向けて上記情報を特定周波数の電波により発信する。 Further, when writing information in the memory of the IC chip 13 by the identification means, towards the receiving antenna of the identification means to the antenna coil 14 of the tag 12 transmits the radio waves of the specific frequency the information. これにより上記と同様にコイル取付面41aには渦電流が発生しないため、 Since thereby the the same manner as described above the coil mounting surface 41a eddy current is not generated,
タグ12が共振し、ICチップ13が活性化される。 Tag 12 resonates, IC chip 13 is activated. この結果、ICチップ13のRF回路にて復調に必要な信号のみを取込まれ、復調回路にて上記情報のデジタル信号が再現されて、CPUによりこのデジタル信号がメモリに書込まれる。 As a result, captured only a signal necessary for demodulation by the RF circuit of the IC chip 13, and the digital signal of the information is reproduced by the demodulation circuit, the digital signal is written into the memory by the CPU. 更に物品41のコイル取付面41aが金属により形成されていても、アンテナコイル14を極めて薄く形成できるので、物品41の搬送中にアンテナコイル14が周囲の物に接触するのを防止できる。 Be further formed by the coil mounting surface 41a is a metal of the article 41, it is possible to extremely thin the antenna coil 14, it is possible to prevent the antenna coil 14 during the conveyance of the article 41 comes into contact with the things around.

【0028】図7及び図8は本発明の第3の実施の形態を示す。 [0028] Figures 7 and 8 show a third embodiment of the present invention. 図7及び図8において図1及び図2と同一符号は同一部品を示す。 7 and 8 the same reference numerals as in FIG. 1 and FIG. 2 shows the same parts. この実施の形態では、物品11はプラスチック等の非磁性かつ非導電性の材料により形成され、アンテナコイル64は磁性材料により平板状に形成された磁芯部材64aと、磁芯部材64aの外周縁を囲むように磁芯部材64aと同一平面上に渦巻き状に巻回されたコイル本体64bとを有する。 In this embodiment, the article 11 is formed of a nonmagnetic and nonconductive material such as plastic, the antenna coil 64 and the magnetic core member 64a which is formed in a flat plate shape of a magnetic material, the outer peripheral edge of the magnetic core member 64a to surround and a coil body 64b wound in a spiral form on the magnetic core member 64a and the same plane. 磁芯部材64aは金属又はフェライトの粉末又はフレークとプラスチックとの複合材により円板状に形成されるか、或いはFe系(アライドケミカル社製のMETGLAS2605S− Magnetic core or member 64a is formed in a disc shape by a composite material of a powder or flakes and plastic metal or ferrite, or a Fe-based (Allied Chemical Company METGLAS2605S-
2)やCo系(アライドケミカル社製のMETGLAS 2) or Co-based (METGLAS manufactured by Allied Chemical Company
2714A)等のアモルファス箔の積層材により円板状に形成される。 It is formed in a disc shape by laminate of amorphous foil 2714A), and the like.

【0029】またタグ62はプラスチック製のケース6 [0029] The tag 62 is made of plastic case 6
6に封入される。 6 is sealed in. このケース66は表面にコイル本体6 Coil body 6 in this case 66 surface
4b及び磁芯部材64aが接着されたケース本体66a The case body 66a to 4b and the magnetic core member 64a is adhered
と、タグ62を覆うようにケース本体66aに嵌着された蓋66bとを有する。 When, and a lid 66b that is fitted to the case body 66a to cover the tag 62. コイル本体64bはケース本体66a表面に接着された銅箔又はアルミ箔のエッチングにより形成することが好ましく、磁芯部材64aはコイル本体64bの中央に位置するようにケース本体66a Coil body 64b is preferably formed by etching of the bonded copper foil or aluminum foil on the case main body 66a surface, the case body 66a to the magnetic core member 64a is located at the center of the coil body 64b
に接着される。 It is adhered to. 上記磁芯部材64aが複合材により形成される場合には、ケース本体66aに接着する前に複合材を円板状に射出成形又は圧縮成形する方法と、液状の複合材を上記コイル本体64bに流込んで固化させる方法とがある。 When the magnetic core member 64a is formed by the composite, a method of injection molding or compression molding a composite material in a disc shape prior to bonding to the case body 66a, a composite liquid into the coil body 64b and a method of solidifying crowded flow. 上記以外は第1の実施の形態と同一に構成される。 Any other structure is the same as the first embodiment.

【0030】このように構成されたRFID用タグ62 The tag thus configured RFID 62
の動作を説明する。 To explain the operation. 識別手段の送受信アンテナからタグ62のアンテナコイル64に向って電波を発信すると、 When transmitting a radio wave toward the receiving antenna of the identification means to the antenna coil 64 of the tag 62,
送受信アンテナとアンテナコイル64との距離が比較的大きくても、磁芯部材64aの存在によりコイル本体6 Even if the distance between the transmitting and receiving antenna and the antenna coil 64 is relatively large, the coil body 6 due to the presence of the magnetic core member 64a
4bの中心を通る磁束密度(この磁束は上記電波により発生する。)が増大する。 Flux density passing through the center of 4b (This flux is generated by the radio wave.) Increases. この結果、タグ62が共振するので、ICチップ13が活性化し、ICチップ13に記憶されている固有の情報がアンテナコイル64から送受信アンテナに向って再発信される。 As a result, the tag 62 resonates, IC chip 13 is activated, a unique information stored in the IC chip 13 is redialing toward the antenna coil 64 to the receiving antenna. これにより識別手段はICチップ13のメモリに記憶された情報を読出すことができる。 Thus the identification means can be read the information stored in the memory of the IC chip 13.

【0031】また識別手段によりICチップ13のメモリに情報を書込むときには、識別手段の送受信アンテナからタグ62のアンテナコイル64に向けて上記情報を特定周波数の電波により発信する。 [0031] When writing information into the memory of the IC chip 13 by the identification means, towards the antenna coil 64 of the tag 62 from the transmitting and receiving antenna of the identification means transmits a radio wave of a specific frequency the information. これにより上記と同様に送受信アンテナとアンテナコイル64との距離が比較的大きくても、磁芯部材64aの存在によりコイル本体64bの中心を通る磁束密度(この磁束は上記電波により発生する。)が増大するため、タグ62が共振し、 Thus even a relatively large distance between the same manner as above transmission-reception antenna the antenna coil 64, the magnetic flux density passing through the center of the coil body 64b due to the presence of the magnetic core member 64a (the magnetic flux generated by the radio wave.) Is to increase, the tag 62 resonates,
ICチップ13が活性化される。 IC chip 13 is activated. この結果、ICチップ13のRF回路にて復調に必要な信号のみを取込まれ、 As a result, it captured only a signal necessary for demodulation by the RF circuit of the IC chip 13,
復調回路にて上記情報のデジタル信号が再現されて、C Digital signal of the information by the demodulation circuit is reproduced, C
PUによりこのデジタル信号がメモリに書込まれる。 This digital signal is written into the memory by the PU. なお、タグ62を接着剤又は両面粘着テープを介して物品11に取付けても、タグ62は極めて薄く物品11から極めて僅かしか突出しないため、その取付強度を十分に確保できる。 Even attaching the tag 62 to the article 11 through an adhesive or double-sided adhesive tape, the tag 62 since no extremely little protruded from very thin article 11, the attaching strength can be sufficiently secured.

【0032】図9及び図10は本発明の第4の実施の形態を示す。 [0032] FIGS. 9 and 10 show a fourth embodiment of the present invention. 図9及び図10において図7及び図8と同一符号は同一物品を示す。 9 and 10 the same reference numerals as in FIG. 7 and FIG. 8 shows the same article. この実施の形態では、物品41 In this embodiment, the article 41
のコイル取付面41aとアンテナコイル64との間に導電性材料により形成された導電板63が介装される。 Conductive plate 63 formed of a conductive material is interposed between the coil mounting surface 41a and the antenna coil 64 of the. 上記物品41はコイル取付面41aを含め鉄やステンレス鋼等の金属により形成される。 It said article 41 is formed by a metal such as iron or stainless steel, including the coil mounting surface 41a. またコイル取付面41a The coil mounting surface 41a
は物品41の周縁近傍に形成される、即ちアンテナコイル64は物品41の周縁近傍に取付けられる。 Is formed near the periphery of the article 41, i.e. the antenna coil 64 is mounted near the periphery of the article 41. 上記導電板63は第2の実施の形態と同様に、ケース本体16a The conductive plate 63 is similar to the second embodiment, the case body 16a
より一回り大きく又は略同一に形成され、その固有抵抗は1.59×10 -6 〜8×10 -6 Ω・cm、好ましくは1.59×10 -6 〜3×10 -6 Ω・cmであり、その厚さは0.01〜2mm、好ましくは0.05〜1mmである。 It is formed in greater or substantially the same and more slightly, its resistivity 1.59 × 10 -6 ~8 × 10 -6 Ω · cm, preferably 1.59 × 10 -6 ~3 × 10 -6 Ω · cm , and the thickness thereof is 0.01 to 2 mm, preferably 0.05 to 1 mm. 上記以外は第3の実施の形態と同一に構成される。 Any other structure is the same as the third embodiment.

【0033】このように構成されたRFID用タグ62 The tag thus configured RFID 62
の動作を説明する。 To explain the operation. 金属により形成された物品41のコイル取付面41aにアンテナコイル14を取付けた状態で、識別手段の送受信アンテナからタグ62のアンテナコイル64に向って電波を発信すると、導電板63がコイル取付面41aへの電波の通過を遮蔽するため、コイル取付面41aには渦電流が発生しない。 The coil mounting surface 41a of the article 41 formed by a metal in a state of attaching the antenna coil 14 and transmits a radio wave toward the receiving antenna of the identification means to the antenna coil 64 of the tag 62, the conductive plate 63 is a coil mounting surface 41a to shield the radio wave passage of the eddy current is not generated in the coil mounting surface 41a. またコイル本体64bの中心に磁芯部材64aが挿入されているため、この磁芯部材64aの周縁に漏れ磁束が発生するとともに、アンテナコイル64が物品41の周縁近傍に取付けられているため、上記漏れ磁束が増加する。 Since the magnetic core member 64a in the center of the coil body 64b is inserted, together with the leakage magnetic flux is generated in the periphery of the magnetic core member 64a, since the antenna coil 64 is attached near the peripheral edge of the article 41, the leakage magnetic flux is increased. この結果、タグ62が共振するので、ICチップ13が活性化し、ICチップ13に記憶されている固有の情報がアンテナコイル64から送受信アンテナに向って再発信される。 As a result, the tag 62 resonates, IC chip 13 is activated, a unique information stored in the IC chip 13 is redialing toward the antenna coil 64 to the receiving antenna. これにより識別手段はICチップ13のメモリに記憶された情報を読出すことができる。 Thus the identification means can be read the information stored in the memory of the IC chip 13.

【0034】また識別手段によりICチップ13のメモリに情報を書込むときには、識別手段の送受信アンテナからタグ62のアンテナコイル64に向けて上記情報を特定周波数の電波により発信する。 Further, when writing information in the memory of the IC chip 13 by the identification means, towards the antenna coil 64 of the tag 62 from the transmitting and receiving antenna of the identification means transmits a radio wave of a specific frequency the information. これにより上記と同様にコイル取付面41aには渦電流が発生せず、磁芯部材64aの周縁に漏れ磁束が発生しかつこの漏れ磁束が増加するため、タグ62が共振し、ICチップ13が活性化される。 Thus not generated eddy currents in the same manner as described above the coil mounting surface 41a, since the leakage magnetic flux is generated in the periphery of the magnetic core member 64a and the leakage flux is increased, the tag 62 resonates, IC chip 13 is It is activated. この結果、ICチップ13のRF回路にて復調に必要な信号のみを取込まれ、復調回路にて上記情報のデジタル信号が再現されて、CPUによりこのデジタル信号がメモリに書込まれる。 As a result, captured only a signal necessary for demodulation by the RF circuit of the IC chip 13, and the digital signal of the information is reproduced by the demodulation circuit, the digital signal is written into the memory by the CPU. 更に物品41のコイル取付面41aが金属により形成されていても、アンテナコイル64を極めて薄く形成できるので、物品41の搬送中にアンテナコイル64が周囲の物に接触するのを防止できる。 Be further formed by the coil mounting surface 41a is a metal of the article 41, it is possible to extremely thin the antenna coil 64, it is possible to prevent the antenna coil 64 during the conveyance of the article 41 comes into contact with the things around.

【0035】なお、上記第3の実施の形態では、アンテナコイルの磁芯部材を円形状に形成し、コイル本体を上記磁芯部材の外周縁を囲むように磁芯部材と同一平面上に矩形の渦巻き状に巻回したが、図9に示すように、アンテナコイル84の磁芯部材84aを矩形状に形成し、 [0035] In the third embodiment, to form a magnetic core member of the antenna coil into a circular shape, a rectangular coil body on a magnetic core member in the same plane so as to surround the outer periphery of the magnetic core member of it was spirally wound, as shown in FIG. 9, to form a magnetic core member 84a of the antenna coil 84 in a rectangular shape,
コイル本体84bを上記磁芯部材84aの外周縁を囲むように磁芯部材84aと同一平面上に矩形の渦巻き状に巻回してもよい。 The coil body 84b may be wound in a rectangular spiral on the magnetic core member 84a flush so as to surround the outer periphery of the magnetic core member 84a. このタグ82は第3の実施の形態と同一のICチップ13を有し、矩形のケース86に収容された状態で非磁性かつ非導電性の物品11に取付けられる。 The tag 82 has a third identical IC chip 13 in the embodiment of, attached to a non-magnetic and non-conductive article 11 while being accommodated in a rectangular case 86. 図9の符号86aはケース本体である。 Code 86a in FIG. 9 is a case body.

【0036】また、上記第4の実施の形態では、アンテナコイルの磁芯部材を円形状に形成し、コイル本体を上記磁芯部材の外周縁を囲むように磁芯部材と同一平面上に矩形の渦巻き状に巻回し、更に上記アンテナコイルを円形状の導電板上に接着したが、図10に示すように、 [0036] In the fourth embodiment, to form a magnetic core member of the antenna coil into a circular shape, a rectangular coil body on a magnetic core member in the same plane so as to surround the outer periphery of the magnetic core member of spirally wound, but was further adhered to the antenna coil to a circular conductive plate, as shown in FIG. 10,
アンテナコイル84の磁芯部材84aを矩形状に形成し、コイル本体84bを上記磁芯部材84aの外周縁を囲むように磁芯部材84aと同一平面上に矩形の渦巻き状に巻回し、更に上記アンテナコイル84を矩形状の導電板83上に接着してもよい。 Forming a magnetic core member 84a of the antenna coil 84 in a rectangular shape, wound in a rectangular spiral coil body 84b on the magnetic core member 84a flush so as to surround the outer periphery of the magnetic core member 84a, further the the antenna coil 84 may be attached on a rectangular conductive plate 83. このタグ82は第3の実施の形態と同一のICチップ13を有し、矩形のケース86に収容された状態で金属製の物品41のコイル取付面41a、即ち物品41の周縁近傍に取付けられる。 The tag 82 has a third identical IC chip 13 in the embodiment of the attached while being accommodated in the rectangular case 86 coil mounting surface 41a of the metallic article 41, i.e., near the periphery of the article 41 . また導電板83はケース本体86aより一回り大きく又は略同一に形成される。 The conductive plate 83 is formed slightly larger or substantially the same from case body 86a.

【0037】 [0037]

【発明の効果】以上述べたように、本発明によれば、アンテナコイルの磁芯部材を磁性材料により平板状に形成し、コイル本体を磁芯部材にこの磁芯部材の平面内に延びる軸線を中心として螺旋状に巻回し、磁芯部材を磁性粉及びプラスチックの複合材又はアモルファス箔の積層材により形成し、更にICチップを磁芯部材の表面に接着するか或いは磁芯部材の近傍に設けたので、アンテナコイルを極めて薄く形成できる。 As described above, according to the present invention, according to the present invention, the magnetic core member of the antenna coil is formed into a flat plate of a magnetic material, the axis extending in the plane of the magnetic core member of the coil body in the magnetic core member wound helically around the form of a laminated material of a composite material or amorphous foil of magnetic powder and plastic core member, further in the vicinity of or magnetic core member to bond the IC chip to the surface of the magnetic core member since there is provided, it can be made extremely thin antenna coil. この結果、物品の搬送中にアンテナコイルが周囲の物に接触するのを防止できる。 As a result, it is possible to prevent the antenna coil during the transport of the article in contact with the things around.

【0038】またアンテナコイルの磁芯部材を磁性材料により平板状に形成し、コイル本体を磁芯部材の外周縁を囲むように磁芯部材と同一平面上に渦巻き状に巻回し、磁芯部材を磁性粉及びプラスチックの複合材又はアモルファス箔の積層材により形成し、更にICチップを磁芯部材の表面に接着すれば、タグに向って電波を発信すると、電波の発信源とアンテナコイルとの距離が比較的大きくても、磁芯部材によりコイル本体の中心を通る磁束密度が増大する。 Further to form the magnetic core member of the antenna coil into a flat plate of a magnetic material, spirally wound on the magnetic core member in the same plane as the coil body surrounding an outer peripheral edge of the magnetic core member, the magnetic core member was formed by laminate composite or amorphous foil of magnetic powder and plastic, if the adhesive further IC chip on the surface of the magnetic core member, when transmitting radio waves towards the tag, the source and the antenna coil of the radio distance be relatively large, the magnetic flux density passing through the center of the coil body is increased by the magnetic core member. この結果、アンテナコイルを含む共振回路の共振の振幅が大きくなるので、タグを十分に活性化できる。 As a result, the amplitude of the resonance of the resonance circuit including the antenna coil is increased, it can be sufficiently activated tags.

【0039】また物品のコイル取付面とアンテナコイルとの間に導電性材料により形成された導電板を介装すれば、金属により形成された物品のコイル取付面にアンテナコイルを取付けた状態で、タグに向って電波を発信しても、導電板がコイル取付面への電波の通過を遮蔽するため、コイル取付面には渦電流が発生せず、またコイル本体の中心に磁芯部材が挿入されているため、この磁芯部材の周縁に漏れ磁束が発生し、タグが共振する。 [0039] In the state when interposed formed conductive plate by a conductive material, attached to the antenna coil to the coil mounting surface of the article formed by metal between the coil mounting surface and the antenna coil of the article, also transmits radio waves toward the tags, since the conductive plates to shield the passing of radio waves to the coil mounting surface, an eddy current is not generated in the coil mounting surface, also inserted magnetic core member at the center of the coil body because it is, the leakage magnetic flux is generated in the periphery of the magnetic core member, the tag resonates. この結果、ICチップが活性化するので、ICチップに記憶されている固有の情報がアンテナコイルから再発信される。 As a result, IC chip since activated, specific information stored in the IC chip is re-transmitted from the antenna coil. また物品のコイル取付面が金属により形成されていても、比較的薄い導電板を介装するだけで済むので、アンテナコイルを極めて薄く形成できる。 Also a coil mounting surface of the article is formed of a metal, since only have to interposed relatively thin conductive plate, can be made extremely thin antenna coil. この結果、物品の搬送中にアンテナコイルが周囲の物に接触するのを防止できる。 As a result, it is possible to prevent the antenna coil during the transport of the article in contact with the things around. 更にタグの物品からの突出量が極めて小さいため、タグを接着剤又は両面粘着テープを介して物品に取付けても、その取付強度を十分に確保できる。 Further, since the protruding amount from the article tag is extremely small, even attached a tag to an article via an adhesive or double-sided adhesive tape, the attaching strength can be sufficiently secured.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明第1実施形態のRFID用タグを示す図2のA−A線断面図。 [1] The present invention A-A line sectional view of FIG. 2 illustrating the RFID tag of the first embodiment.

【図2】そのタグを収容するケースの蓋を取除いた状態を示す図1のB矢視図。 [Figure 2] B arrow view of FIG. 1 showing a state in which Remove the lid of the case that houses the tag.

【図3】そのタグに識別手段の送受信アンテナを対向させた状態を示す側面図。 Figure 3 is a side view showing a state in which the transmitting and receiving antennas are opposed identification means to the tag.

【図4】その送受信アンテナを含む識別手段の構成図。 Figure 4 is a configuration diagram of the identification means including the transmission and reception antennas.

【図5】本発明の第2実施形態を示す図6のC−C線断面図。 Sectional view taken along line C-C of Figure 6 showing a second embodiment of the present invention; FIG.

【図6】そのタグを収容するケースの蓋を取除いた状態を示す図5のD矢視図。 [6] D arrow view of FIG. 5 showing a state in which Remove the lid of the case that houses the tag.

【図7】本発明の第3実施形態を示す図8のE−E線断面図。 7 sectional view taken along line E-E of FIG. 8 showing a third embodiment of the present invention.

【図8】そのタグを収容するケースの蓋を取除いた状態を示す図7のF矢視図。 [8] F arrow view of FIG. 7 showing a state in which Remove the lid of the case that houses the tag.

【図9】本発明の第4実施形態を示す図10のG−G線断面図。 [9] The 4 G-G line sectional view of FIG. 10 showing an embodiment of the present invention.

【図10】そのタグを収容するケースの蓋を取除いた状態を示す図9のH矢視図。 [10] H arrow view of FIG. 9 showing a state in which Remove the lid of the case that houses the tag.

【図11】本発明の第5実施形態を示す図8に対応する図。 11 is a diagram corresponding to FIG. 8 showing a fifth embodiment of the present invention.

【図12】本発明の第6実施形態を示す図8に対応する図。 Diagram corresponding to FIG. 8 showing the sixth embodiment of the present invention; FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

11,41 物品 12,62,82 RFID用タグ 13 ICチップ 14,64,84 アンテナコイル 14a,64a,84a 磁芯部材 14b,64b,84b コイル本体 41a コイル取付面 43,63,83 導電板 11 and 41 articles 12,62,82 RFID tag 13 IC chip 14,64,84 antenna coils 14a, 64a, 84a core member 14b, 64b, 84b coil body 41a coil mounting surface 43,63,83 conductive plate

Claims (8)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 物品(11,41)に取付けられかつ前記物品 1. A attached to the article (11, 41) and said article
    (11,41)毎に異なる固有の情報が記憶されたICチップ (11, 41) IC chip where different specific information stored in each
    (13)と、前記物品(11,41)に取付けられかつ前記ICチップ(13)に電気的に接続されたアンテナコイル(14)とを備えたRFID用タグにおいて、 前記アンテナコイル(14)が磁性材料により平板状に形成された磁芯部材(14a)と、前記磁芯部材(14a)にこの磁芯部材(14a)の平面内に延びる軸線を中心として螺旋状に巻回されたコイル本体(14b)とを有し、 前記磁芯部材(14a)が磁性粉及びプラスチックの複合材又はアモルファス箔の積層材により形成され、 前記ICチップ(13)が前記磁芯部材(14a)の表面に接着されるか或いは前記磁芯部材(14a)の近傍に設けられたことを特徴とするRFID用タグ。 And (13), in the RFID tag with and electrically connected to the antenna coil to the attached to the article (11, 41) and said IC chip (13) (14), said antenna coil (14) a magnetic core member (14a) formed in a flat plate of a magnetic material, said magnetic core member (14a) to the coil wound body spirally around an axis extending in the plane of the magnetic core member (14a) (14b) and has the magnetic core member (14a) is formed by laminate composite or amorphous foil of magnetic powder and plastic, in the IC chip (13) surface of said magnetic core member (14a) RFID tag, characterized in that provided in the vicinity of the bonded is or said magnetic core member (14a).
  2. 【請求項2】 物品(11,41)に取付けられかつ前記物品 2. A attached to the article (11, 41) and said article
    (11,41)毎に異なる固有の情報が記憶されたICチップ (11, 41) IC chip where different specific information stored in each
    (13)と、前記物品(11,41)に取付けられかつ前記ICチップ(13)に電気的に接続されたアンテナコイル(64,84) (13) and the article (11, 41) in the mounted and said IC chip (13) electrically connected antenna coil (64, 84)
    とを備えたRFID用タグにおいて、 前記アンテナコイル(64,84)が磁性材料により平板状に形成された磁芯部材(64a,84a)と、前記磁芯部材(64a,84 In the RFID tag with bets, the antenna coil (64, 84) are magnetic core member (64a, 84a) formed in flat plate of a magnetic material and said magnetic core member (64a, 84
    a)の外周縁を囲むように前記磁芯部材(64a,84a)と同一平面上に渦巻き状に巻回されたコイル本体(64b,84b)とを有し、 前記磁芯部材(64a,84a)が磁性粉及びプラスチックの複合材又はアモルファス箔の積層材により形成され、 前記ICチップ(13)が前記磁芯部材(64a,84a)の表面に接着されたことを特徴とするRFID用タグ。 The so as to surround the outer periphery of a) a magnetic core member (64a, 84a) and the coil body (64b wound in a spiral shape on the same plane, 84b) and has the magnetic core member (64a, 84a ) is formed by laminate composite or amorphous foil of magnetic powder and plastic, wherein the IC chip (13) said magnetic core member (64a, 84a) the RFID tag is characterized in that it is bonded to the surface of the.
  3. 【請求項3】 磁性粉の粒径をdμmとし、アンテナコイル(14,64,84)の共振周波数をfMHzとするときに、 The particle size of 3. A magnetic powder is Dimyuemu, the resonant frequency of the antenna coil (14,64,84) when the FMHz,
    d×f 0.5が20以下となるように磁性粉の粒径が選定された請求項1又は2記載のRFID用タグ。 d × f 0.5 is 20 RFID tag according to claim 1 or 2, wherein the particle size of the magnetic powder is selected to become less.
  4. 【請求項4】 磁芯部材(14a,64a,84a)が磁性粉及びプラスチックの複合材を射出成形又は圧縮成形することにより形成された請求項1又は2記載のRFID用タグ。 4. A magnetic core member (14a, 64a, 84a) is an RFID tag according to claim 1 or 2, wherein which is formed by injection molding or compression molding a composite material of magnetic powder and plastic.
  5. 【請求項5】 アンテナコイル(14,64,84)が取付けられる物品(41)のコイル取付面(41a)とアンテナコイル(14,6 5. A coil mounting surface of the article which the antenna coil (14,64,84) is mounted (41) and (41a) antenna coils (14,6
    4,84)との間に導電性材料により形成された導電板(43,6 4,84) and the conductive plate formed of a conductive material between the (43,6
    3,83)が介装された請求項1又は2記載のRFID用タグ。 3,83) is interposed claim 1 or 2 RFID tag according.
  6. 【請求項6】 導電板(43,63,83)の固有抵抗が1.59 6. resistivity of the conductive plate (43,63,83) is 1.59
    ×10 -6 〜8×10 × 10 -6 ~8 × 10 -6 Ω・cmである請求項5記載のR -6 Omega · cm where R according to claim 5, wherein
    FID用タグ。 Tag for the FID.
  7. 【請求項7】 導電板(43,63,83)の厚さが0.01〜2 7. The thickness of the conductive plate (43,63,83) is 0.01
    mmである請求項5記載のRFID用タグ。 The RFID tag according to claim 5, wherein in mm.
  8. 【請求項8】 物品(11,41)に接着剤又は両面粘着テープを介して取付けられた請求項1ないし7いずれか記載のRFID用タグ。 8. An article (11, 41) to the adhesive or claims 1 to 7 RFID tag according to any one attached via the double-sided adhesive tape.
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JP2008301527A (en) * 2008-09-01 2008-12-11 Toda Kogyo Corp Magnetic field antenna, wireless system and communication system configured by employing the same
DE112007002024T5 (en) 2006-09-26 2009-06-18 Murata Mfg. Co., Ltd., Nagaokakyo-shi An inductively coupled module and element inductively coupled module
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US8613395B2 (en) 2011-02-28 2013-12-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8757502B2 (en) 2011-02-28 2014-06-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8797225B2 (en) 2011-03-08 2014-08-05 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US8937576B2 (en) 2011-04-05 2015-01-20 Murata Manufacturing Co., Ltd. Wireless communication device
US8740093B2 (en) 2011-04-13 2014-06-03 Murata Manufacturing Co., Ltd. Radio IC device and radio communication terminal
US9378452B2 (en) 2011-05-16 2016-06-28 Murata Manufacturing Co., Ltd. Radio IC device
US8878739B2 (en) 2011-07-14 2014-11-04 Murata Manufacturing Co., Ltd. Wireless communication device
US8770489B2 (en) 2011-07-15 2014-07-08 Murata Manufacturing Co., Ltd. Radio communication device
US8814056B2 (en) 2011-07-19 2014-08-26 Murata Manufacturing Co., Ltd. Antenna device, RFID tag, and communication terminal apparatus
US9543642B2 (en) 2011-09-09 2017-01-10 Murata Manufacturing Co., Ltd. Antenna device and wireless device
US8905296B2 (en) 2011-12-01 2014-12-09 Murata Manufacturing Co., Ltd. Wireless integrated circuit device and method of manufacturing the same
US8720789B2 (en) 2012-01-30 2014-05-13 Murata Manufacturing Co., Ltd. Wireless IC device
US9692128B2 (en) 2012-02-24 2017-06-27 Murata Manufacturing Co., Ltd. Antenna device and wireless communication device
US9846834B2 (en) 2014-02-14 2017-12-19 Murata Manufacturing Co., Ltd. Antenna device and wireless communication device

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