JP2002319009A - Rfid tag structure and electromagnetic coupler of rfid tag - Google Patents

Rfid tag structure and electromagnetic coupler of rfid tag

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Publication number
JP2002319009A
JP2002319009A JP2001124011A JP2001124011A JP2002319009A JP 2002319009 A JP2002319009 A JP 2002319009A JP 2001124011 A JP2001124011 A JP 2001124011A JP 2001124011 A JP2001124011 A JP 2001124011A JP 2002319009 A JP2002319009 A JP 2002319009A
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rfid tag
coil
antenna
electromagnetic coupler
loop antenna
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JP2001124011A
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JP4700831B2 (en
Inventor
Nakamaro Hiyoudou
Fujio Senba
不二夫 仙波
仲麻呂 兵頭
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Hanex Chuo Kenkyusho:Kk
株式会社ハネックス中央研究所
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Abstract

PROBLEM TO BE SOLVED: To provide an RFID tag structure and an electromagnetic coupler of an RFID tag capable of increasing the range of applications of the RFID tag by extending the communicable distance of the RFID tag.
SOLUTION: An induction coil 6 is embedded in the electromagnetic coupler 5, with the connecting ends 6a and 6b of the coil connected to a receptacle 5b. A connecting terminal 7c connected to the connecting ends 7a and 7b of a loop antenna 7 is connected to the receptacle 5b by a plug 5c. The electromagnetic coupler 5 is provided with a mounting part 5a by which the RFID tag 1a is mounted in a position where the induction coil 6 is electromagnetically coupled to the antenna coil 2a.
COPYRIGHT: (C)2002,JPO

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、アンテナコイルを使用して電磁波で通信を行うRFIDタグ構造及びRF BACKGROUND OF THE INVENTION The present invention, RFID tag structure and RF communication is performed electromagnetic waves using an antenna coil
IDタグの電磁結合器に関するものである。 It relates electromagnetic coupler of the ID tag.

【0002】 [0002]

【従来の技術】従来、RFIDタグ(Radio Frequency Conventionally, RFID tags (Radio Frequency
IDentification TAG)には電磁誘導型と電磁結合型とがあり、何れも電磁波を利用してリーダライタ機等と非接触で通信を行なうようになっている。 The IDentification TAG) has an electromagnetic induction type and the electromagnetic coupling type, both by utilizing the electromagnetic waves and performs communication with the reader-writer apparatus or the like and non-contact.

【0003】RFIDタグはアンテナコイルと制御部とを有し、リーダライタ機からの送信信号をアンテナコイルが受信すると、制御部がそれを電力としてコンデンサに蓄積すると共に、その電力を利用して記憶部に記憶されたIDコード等の情報を再びアンテナコイルからリーダライタ機に送信する。 [0003] RFID tag includes an antenna coil and a control unit, if the transmission signal from the reader-writer device is received by the antenna coil, the control unit is stored in the capacitor it as power, by utilizing the power storage again transmitted from the antenna coil to the reader-writer device information of the ID code or the like stored in the parts.

【0004】送受信方式としては、ASK(Amplitude [0004] as a transfer scheme, ASK (Amplitude
Shift Keying)方式と、FSK(Frequency Shift Keyi And Shift Keying) method, FSK (Frequency Shift Keyi
ng)方式とがあり、前者は電磁波の強度変調により送受信を行い、後者は電磁波の周波数変調により送受信を行なう。 There is a ng) method, the former performs the transmission and reception by the intensity modulation of the electromagnetic wave, the latter transmits and receives the frequency modulation of the electromagnetic wave.

【0005】一般的なRFIDタグをアンテナコイルの形式で分けると、円形の空心コイルを使用した同心円盤状のアンテナコイルと、棒状のフェライトコアにエナメル線等の絶縁銅線を巻き付けたシリンダ状のアンテナコイルの2種類が存在し、外形は夫々のアンテナコイルの形状に対応して前者は円盤状に形成され、後者は棒状に形成される。 [0005] Separating general RFID tag in the form of the antenna coil, the circular and air-core concentric Release shaped antenna coil using the coil, the rod-like ferrite core enamel wire such as an insulating copper wire wound cylinder-shaped there are two types of antenna coil, the outer shape of the former corresponds to the shape of each antenna coil is formed in a disk shape, the latter being formed into a rod shape.

【0006】尚、同心円盤状のアンテナコイルを有するRFIDタグは円形コイルの面方向の磁束変化を利用して通信を行い、シリンダ状のアンテナコイルを有するR [0006] Incidentally, RFID tag having a concentric plate-shaped antenna coil performs communication using a magnetic flux change in the surface direction of the circular coil, R having a cylindrical antenna coil
FIDタグは軸方向の磁束変化を利用して通信を行なうようになっている。 FID tag is adapted to perform communication using a magnetic flux change in the axial direction.

【0007】 [0007]

【発明が解決しようとする課題】しかしながら、一般にRFIDタグの通信可能距離は数mm〜数cm程度であり、 [SUMMARY OF THE INVENTION However, in general the communication distance of the RFID tag is about several mm~ number cm,
例えば、RFIDタグに記憶された情報を小型のリーダライタ機により読み取る場合には、該リーダライタ機をRFIDタグの通信可能距離、即ち、数mm〜数cmに近づける必要があり、数m〜数十mと離れた位置から読み取ることは不可能である。 For example, when reading the information stored in the RFID tag by a small writer machine, the communicable distance of the RFID tag the reader-writer device, i.e., it should be as close to the number mm~ number cm, number m~ number it is impossible to read from tens m and away. そのため、RFIDタグの利用分野が制限されていた。 Therefore, it has limited the use field of RFID tags.

【0008】本発明は前記課題を解決するものであり、 [0008] The present invention has been made to solve the above problems,
その目的とするところは、RFIDタグの通信可能距離を延長して、該RFIDタグの利用分野を広げることが出来るRFIDタグ構造及びRFIDタグの電磁結合器を提供せんとするものである。 And an object thereof is to extend the communicable distance of the RFID tag, there is provided St. electromagnetic coupler RFID tag structure and RFID tags can be widened Field of the RFID tag.

【0009】 [0009]

【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タグ構造は、アンテナコイルを有するRFIDタグと、ループアンテナと、前記アンテナコイルと前記ループアンテナとを電磁結合するための電磁結合器とを備え、前記電磁結合器本体に誘導用コイルと、その誘導用コイルに前記RFIDタグのアンテナコイルを接近配置して電磁結合する装着部とが設けられ、前記誘導用コイルの接続端と、前記ループアンテナの接続端とが直列接続されることを特徴とする。 Means for Solving the Problems] RFID tag structure according to the present invention for achieving the above object, an RFID tag having an antenna coil, a loop antenna and said loop antenna and for electromagnetic coupling of said antenna coil of an electromagnetic coupler, an induction coil in the electromagnetic coupler body, a mounting portion for the electromagnetic coupling is provided in close proximity placement of the antenna coil of the RFID tag to the induction coil, said induction coil a connection end, a connection end of said loop antenna is characterized by being connected in series.

【0010】本発明は、上述の如く構成したので、RF The present invention, since the configuration as described above, RF
IDタグに電磁結合器を介してループアンテナを電磁的に結合し、そのループアンテナの作用によりRFIDタグの通信可能距離を任意に拡大することが出来る。 ID tag attached to the loop antenna electromagnetically through electromagnetic couplers, optionally can be expanded communication distance of the RFID tag by the action of the loop antenna.

【0011】即ち、電磁結合器本体に設けられた誘導用コイルの接続端と、ループアンテナの接続端とを直列接続し、装着部にRFIDタグを装着して該RFIDタグのアンテナコイルを誘導用コイルに接近配置して電磁結合することで、誘導用コイルを介してRFIDタグのアンテナコイルとループアンテナとを電磁結合し、ループアンテナの作用によりRFIDタグの通信可能距離を任意に拡大することが出来るものである。 [0011] That is, for inducing a connecting end of the induction coil provided in the electromagnetic coupler body, connected in series and the connection end of the loop antenna, the antenna coil of the RFID tag equipped with RFID tags to the mounting portion by electromagnetically coupling close disposed coil, the antenna coil and the loop antenna of the RFID tag electromagnetic coupling through the induction coil, it is possible to arbitrarily expand the communication distance of the RFID tag by the action of the loop antenna it is those that can be.

【0012】先ず、外部のリーダライタ機等からRFI [0012] First of all, RFI from the outside of the reader-writer machine, etc.
Dタグに記憶された固有情報を読み出す場合、その情報はRFIDタグのアンテナコイルから磁束変化として誘導用コイルに伝送される。 When reading the unique information stored in the D tag, the information is transmitted to the induction coil as the magnetic flux changes from the antenna coil of the RFID tag.

【0013】すると、誘導用コイルにはその磁束変化に応じた電流が流れ、その電流は同時にそれと直列回路を構成するループアンテナにも流れ、該ループアンテナの全周に亘って磁束変化が発生する。 [0013] Then, the induction coil current flows in accordance with the change in the magnetic flux, the current flows in the loop antennas constituting the same series circuit time, the magnetic flux change occurs over the entire circumference of the loop antenna . 従って、ループアンテナの外部全方向からリーダライタ機等で情報を読み出すことが出来る。 Therefore, it is possible to read information in a reader-writer device and the like from the outside all directions of the loop antenna.

【0014】逆にリーダライタ機等から電力や情報をR [0014] the power and information from the reader-writer machine or the like to reverse R
FIDタグに伝達する場合は、リーダライタ機等のアンテナから発信した信号により生じる磁束変化を、先ずループアンテナが捉え、それによってループアンテナに電流が流れ、それを誘導用コイルが磁束の形態で増幅(巻回数による増幅)し、その増幅された磁束の変化をRF When transmitting the FID tag a magnetic flux change caused by transmitting the signal from the antenna, such as a reader-writer device, first capture loop antenna, whereby current flows through the loop antenna, amplified form the induction coil of the magnetic flux it (amplification by the number of turns) and, RF changes in the amplified flux
IDタグのアンテナコイルが捉える。 Antenna coil of the ID tag is captured.

【0015】このようにループアンテナの全方向から通信が可能なので、簡単な構造で、且つ低コストでRFI [0015] Since that can communicate in all directions of such loop antenna, a simple structure, and RFI at low cost
Dタグの通信可能距離をループアンテナの大きさや形状により任意に延長、拡大することが出来る。 The D communicable distance of the tag optionally extended by the size and shape of the loop antenna can be enlarged.

【0016】また、標準として市販されているRFID Further, RFID commercially available as standard
タグを、そのまま使用して構成出来る。 Tag, it can be configured to use. また、電磁結合器の装着部にRFIDタグを装着するだけで、そのアンテナコイルとループアンテナとを安定して電磁結合させることが出来るので施工が簡単になり、長時間安定に作動させることが出来る。 Furthermore, just mounting the RFID tag on the mounting portion of the electromagnetic coupler, that since the antenna coil and the loop antenna stable can be electromagnetically coupled construction is simplified, it is possible to stably operate a long time .

【0017】また、予めRFIDタグを電磁結合器の装着部に装着した状態とすることにより管理、保管、運搬及び施工がより容易に出来る。 Further, management by a state of wearing the pre RFID tags to the mounting portion of the electromagnetic coupler, storage, transportation and installation more easily.

【0018】更に電磁結合器に予めループアンテナも接続して、電磁結合器、RFIDタグ及びループアンテナをユニット化することも出来、これにより管理、保管、 [0018] In further connected beforehand loop antenna to the electromagnetic coupler, electromagnetic coupler, can also be unitized RFID tag and the loop antenna, thereby managing, storing,
運搬及び施工を更に簡単化することが出来る。 It is possible to further simplify the transport and construction.

【0019】また、RFIDタグのアンテナコイルがシリンダ状または同心円盤状に形成された場合には、市販されたRFIDタグを使用出来るので入手が容易で大量生産によりコストダウンを図ることが出来る。 Further, when the antenna coil of the RFID tag is formed in the cylinder-shaped or concentric plate shape, can reduce the cost by mass production is easily available since it uses the RFID tags are commercially available.

【0020】また、前記ループアンテナがシート状の基材に固定された場合には、シート状の基材に固定されたループアンテナを特定の形状に容易に形成することが出来るので設置若しくは布設が容易に出来る。 Further, when the loop antenna is fixed to the sheet-like base material, since the loop antenna is fixed to the sheet substrate can be easily formed into a particular shape installation or laying is easily.

【0021】また、本発明に係るRFIDタグの電磁結合器は、RFIDタグのアンテナコイルと、ループアンテナとを電磁結合するための電磁結合器であって、電磁結合器本体に、誘導用コイルと、該誘導用コイルに前記RFIDタグのアンテナコイルを接近配置して電磁結合する装着部とを備え、前記誘導用コイルの接続端に前記ループアンテナの接続端が接続出来るように構成したことを特徴とする。 Further, the electromagnetic coupler of the RFID tag according to the present invention is an electromagnetic coupler for electromagnetically coupling the antenna coil of the RFID tag, and a loop antenna, the electromagnetic coupling body, an induction coil , characterized by a mounting portion electromagnetically coupled in close proximity placement of the antenna coil of the RFID tag to the induction coil, connecting end of the loop antenna to the connection end of the induction coil is configured to be connected to.

【0022】上記RFIDタグの電磁結合器を用いて上述のRFIDタグ構造を容易に構成することが出来る。 [0022] can be easily configured the RFID tag structure described above using an electromagnetic coupler of the RFID tag.

【0023】 [0023]

【発明の実施の形態】図により本発明に係るRFIDタグ構造及びRFIDタグの電磁結合器の一実施形態を具体的に説明する。 Specifically described an embodiment of an electromagnetic coupler of RFID tag structure and RFID tags according to the present invention by showing PREFERRED EMBODIMENTS. 図1は同心円盤状のアンテナコイルを有するRFIDタグに適用した本発明に係るRFIDタグ構造を示す断面説明図、図2は同心円盤状のアンテナコイルを有するRFIDタグに適用した電磁結合器の構成を示す斜視図である。 Figure 1 is cross-sectional view of an RFID tag structure according to the present invention applied to a RFID tag having a concentric plate-shaped antenna coil, the configuration of the electromagnetic coupler is applied to a RFID tag 2 having a concentric plate-shaped antenna coil is a perspective view showing a.

【0024】図3(a)は同心円盤状のアンテナコイルを有するRFIDタグの構成を示す平面図、図3(b) [0024] 3 (a) is a plan view showing the configuration of an RFID tag having a concentric plate-shaped antenna coil, and FIG. 3 (b)
は同心円盤状のアンテナコイルを有するRFIDタグに発生する磁界の様子を示す模式図、図4はRFIDタグの制御系の構成を示すブロック図である。 Is a schematic diagram showing a state of the magnetic field generated in the RFID tag having a concentric plate-shaped antenna coil, Fig. 4 is a block diagram showing a configuration of a control system of the RFID tag.

【0025】図5(a),(b)はシリンダ状のアンテナコイルを有するRFIDタグに適用した本発明に係るRFIDタグ構造を示す断面説明図及び平面説明図、図6はシリンダ状のアンテナコイルを有するRFIDタグに適用した電磁結合器の構成を示す斜視説明図、図7はシリンダ状のアンテナコイルを有するRFIDタグの構成及びこれに発生する磁界の様子を示す模式図である。 FIG. 5 (a), (b) is a sectional explanatory view and a plan view illustrating an RFID tag structure according to the present invention applied to a RFID tag having a cylindrical antenna coil, Fig. 6 is cylindrical antenna coil perspective view showing a configuration of an electromagnetic coupler which is applied to an RFID tag having, FIG. 7 is a schematic diagram showing the magnetic field generated structure and to the RFID tag having a cylindrical antenna coil.

【0026】図8(a)はループアンテナがシート状の基材に固定され、該シート状の基材に取り付けられた電磁結合器にRFIDタグが装着されたRFIDタグ構造において該シート状の基材が巻回された使用前の状態を示す側面図である。 [0026] FIG. 8 (a) loop antenna is fixed to the sheet substrate, the sheet-like base in an RFID tag structure RFID tag is attached to an electromagnetic coupler attached to said sheet substrate wood is a side view showing a state before use wound.

【0027】図8(b),(c)は使用に際して図8 FIG. 8 (b), (c) is in use 8
(a)のシート状の基材を伸ばした状態を示す側面図及び平面図、図9は図8に示すRFIDタグ構造を複数直列に配列して無人車や走行ロボット等の誘導レールを形成した一例を示す平面模式図である。 A side view and a plan view showing a state in which stretched sheet substrate of (a), 9 formed a guide rail, such as unmanned vehicles and mobile robot by arranging an RFID tag structure more series shown in FIG. 8 it is a schematic plan view showing an example.

【0028】先ず、図1〜図4を用いて、本発明に係るRFIDタグ構造及びRFIDタグの電磁結合器の一例として、同心円盤状のアンテナコイル2aを有するRF [0028] First, with reference to FIGS. 1 to 4, as an example of an electromagnetic coupler of RFID tag structure and RFID tags according to the present invention, RF having a concentric plate-shaped antenna coil 2a
IDタグ1aを採用した場合の構成について説明する。 Description will be given of a configuration in the case of adopting the ID tag 1a.

【0029】本実施形態で好適に採用されるRFIDタグ1a,1bは、電磁結合方式、電磁誘導方式のRFI The RFID tag 1a which is preferably employed in the present embodiment, 1b is an electromagnetic coupling method, RFI electromagnetic induction type
Dタグであり、本実施形態では、電磁誘導方式のRFI D is a tag, in the present embodiment, RFI electromagnetic induction type
D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。 It will be described below an embodiment of a case of using a D tag.

【0030】図1において、電磁結合器5は電気的絶縁性を有する樹脂製の本体と、その本体内に埋設された円形の空心コイルからなる誘導用コイル6と、同心円盤状のアンテナコイル2aを有するRFIDタグ1aを装着して該アンテナコイル2aと誘導用コイル6とを接近配置して電磁結合するための装着部5aを有している。 [0030] In FIG 1, the resin body electromagnetic coupler 5 having an electrical insulating property, the induction coil 6 comprising a circular air-core coil embedded in the body, concentric plate-shaped antenna coil 2a and a mounting portion 5a for electromagnetically coupled wearing the RFID tag 1a is arranged close to the induction coil 6 and the antenna coil 2a having.

【0031】装着部5aはRFIDタグ1aの外形に適合するように断面円形状の浅溝で構成され、該装着部5 The mounting portion 5a is composed of a circular cross section of shallow grooves to conform to the outer shape of the RFID tag 1a, said mounting portion 5
aの下部に誘導用コイル6が配置されている。 Induction coil 6 is arranged in the lower part of a. 誘導用コイル6は樹脂によりモールドして電磁結合器5に内蔵される。 Induction coil 6 is embedded in the electromagnetic coupler 5 is molded with resin. RFIDタグ1aは装着部5aに接着材11等により接着固定され、安定して装着される。 RFID tag 1a is adhesively fixed by an adhesive 11 or the like to the mounting portion 5a, it is stably mounted.

【0032】電磁結合器5の内部に埋設された誘導用コイル6の接続端6a,6bは、該電磁結合器5の表面側に露出して設けられた導電性のネジ式のレセプタクル5 The connecting end 6a of the electromagnetic coupler induction coil 6 buried inside the 5, 6b is the receptacle 5 of the electromagnetic coupler 5 exposed to the surface side conductive screw type, provided for the
bに電気的に接続されており、該レセプタクル5bには導電性を有するネジ式のプラグ5cが螺合し得るようになっている。 b is electrically connected to a screw-type plug 5c having conductivity so can screwed into the receptacle 5b.

【0033】7はループアンテナであり、該ループアンテナ7の接続端7a,7bには接続端子7cが電気的に接続されている。 [0033] 7 is a loop antenna, connecting end 7a of the loop antenna 7, the 7b connection terminals 7c are electrically connected. そして、接続端子7cを介在させてプラグ5cをレセプタクル5bに螺合締着することで、接続端子7c、プラグ5c及びレセプタクル5bを介して誘導用コイル6とループアンテナ7とが直列回路として接続される。 Then, connect the terminal 7c is interposed by screwing fastened plug 5c into the receptacle 5b, the connection terminal 7c, and the induction coil 6 via the plug 5c and receptacle 5b and the loop antenna 7 is connected as a series circuit that.

【0034】これにより、電磁結合器5の誘導用コイル6を介してループアンテナ7と、RFIDタグ1aのアンテナコイル2aとを電磁結合することが出来る。 [0034] Thus, the loop antenna 7 via the induction coil 6 of the electromagnetic coupler 5, an antenna coil 2a of the RFID tag 1a can be electromagnetically coupled.

【0035】ループアンテナ7は目的とする通信エリアにより任意の閉面積と形状に布設出来る。 The loop antenna 7 can laying in any closed area and shape by the communication area of ​​interest. ループアンテナ7の長さ(ループ)を伸ばせば、それに応じて通信エリアは拡大するが、通信感度は、その面積に反比例して低下する傾向にある。 If reach out length of the loop antenna 7 (loop), the communication area is enlarged accordingly, communication sensitivity tends to decrease in inverse proportion to its area. 他方、RFIDタグ1a,1b及びリーダライタ機の通信感度が高ければ、それに応じて通信エリアを拡大出来る。 On the other hand, the higher the communication sensitivity of the RFID tag 1a, 1b and the reader-writer device can enlarge a communication area accordingly.

【0036】例えば、外径直径50mmの同心円盤状のアンテナコイル2aを有するRFIDタグ1aの場合、実験によればループアンテナ7を細長いループ形状とした場合に、その最大通信距離を10m〜20m程度まで拡大出来ることが判明した。 [0036] For example, if the RFID tag 1a with concentric plate-shaped antenna coil 2a of the outer diameter of the diameter 50 mm, when the loop antenna 7 and an elongated loop shape, according to the experiment, 10M~20m about the maximum communication distance that can be expanded is found to.

【0037】尚、本実施形態では、誘導用コイル6の接続端6a,6bと、ループアンテナ7の接続端7a,7 [0037] In the present embodiment, the connecting end 6a of the induction coil 6, and 6b, connecting end 7a of the loop antenna 7, 7
bとの電気的接続を接続端子7cを介在させて導電性のネジ式のプラグ5cとレセプタクル5bとを螺合することにより着脱自在に構成したが、ハンダ付けにより電気的に接続しても良い。 Although detachably constructed by electrically connecting the b is interposed a connection terminal 7c are screwed the plug 5c and receptacle 5b conductive threaded, it may be electrically connected by soldering .

【0038】図1に示すRFIDタグ構造は、RFID The RFID tag structure shown in FIG. 1, RFID
タグ1aの同心円盤状のアンテナコイル2aを使用して電磁波で通信を行う場合の一例であって、図3(a)に示すように、同心円盤状のアンテナコイル2a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 An example of a case where using a concentric plate-shaped antenna coil 2a of the tag 1a communicating with electromagnetic waves, as shown in FIG. 3 (a), comprising a concentric plate-shaped antenna coil 2a, a control unit semiconductor and the IC chip 4 is configured by directly not through the printed circuit board or the like, thereby RFID
タグ1aの小型化を実現している。 It is downsized tag 1a.

【0039】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4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 has been constructed integrally packages such as IC (semiconductor integrated circuit) chip or LSI (a semiconductor large-scale integrated circuit) chips, the inside of the semiconductor IC chip 4, as shown in FIG. 4, CPU 4a of the control unit, a memory 4b serving as the memory unit, the transceiver 4c and the power storage means and comprising a capacitor 4d it is provided.

【0040】図示しない外部のリーダライタ機等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。 The signal transmitted from the unillustrated external reader-writer apparatus or the like is transmitted to CPU4a via the transceiver 4c, power is stored in the capacitor 4d. 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機等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。 The capacitor 4d as a power storage unit without power continuously semiconductor IC chip 4 from an external reader-writer apparatus or the like may be intended to be supplied.

【0041】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。 [0041] CPU4a is a central processing unit reads the programs and various data stored in the memory 4b, makes the necessary calculations and determination, and performs various controls.

【0042】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が各種の目的に応じて設置された際の各種固有情報が記憶されている。 [0042] Various specific information when various programs and electromagnetic induction tag 1a for the memory 4b which CPU4a operates is installed in accordance with the various purposes are stored.

【0043】また、図3に示す同心円盤状のアンテナコイル2a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をなして同心円盤状に巻かれており、そのアンテナコイル2aのインダクタンスは9. [0043] As an example of a concentric plate-shaped antenna coil 2a shown in FIG. 3, is wound concentrically discotic copper wire having a diameter of about 30μm is no multiple layers in the radial direction in a single wire winding, the antenna the inductance of the coil 2a is 9.
5mH(周波数125kHz)程度で、該アンテナコイル2 5mH (Frequency 125 kHz) degree, the antenna coil 2
aに共振用に別途接続されたコンデンサの静電容量は1 Capacitance of the capacitor which is separately connected to the resonance in a 1
70pF(周波数125kHz)程度であった。 70pF was (frequency 125kHz) about. 図3(b) Figure 3 (b)
にRFIDタグ1aに発生する磁界Hを示す。 It shows the magnetic field H generated in the RFID tag 1a to.

【0044】本実施形態のRFIDタグ1aは、無線周波が1波の振幅偏移変調(ASK;Amplitude Shift Ke The RFID tag 1a of the present embodiment, amplitude-shift keying radio frequency is one wave (ASK; Amplitude Shift Ke
ying)の無線通信方式を使い、共振周波数帯域も広い、 Use a wireless communication system of ying), the resonance frequency band is wide,
線径も数十ミクロンの空心のアンテナコイル2a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CM Very little CM power consumption incorporating special transceiver circuit in the air-core of the antenna coil 2a also wire diameter tens of microns
OS−ICを使ったRFIDタグ1aを採用した。 It adopted the RFID tag 1a using the OS-IC.

【0045】RFIDタグでは外部のリーダライタ機等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。 [0045] received by the resonance frequency of the antenna coil which is built an AC magnetic field transmitted to the RFID tag from the external reader-writer apparatus or the like in the RFID tag. 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;FrequencyShift 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。 Conventional RFID tags that time, the frequency shift keying in order to extend the communication distance; radio frequency in (FSK FrequencyShift Keying) scheme, for example, using a two-wave of 125kHz and 117 kHz, besides to increase the received power use ferrite core antenna coil, and thicker wire diameter of the coil extend the communication distance in the multiple turn type it was common.

【0046】無線周波を2波使う周波数偏移変調(FS The frequency shift keying using the radio frequency two-wave (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。 K) scheme, the communication distance communication error will not be able to communicate generated is extremely reduced with the received power shift the reception frequency approaching conductive member such as a metal or a magnetic material is reduced, practically, use RFID tag to become impossible, obsession and it is impossible to use attached to the conductive member such as a metal or a magnetic substance was dominant.

【0047】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を使って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が出来るRFIDタグが提案され、広く市販されている。 [0047] However, RF is recently, use a wireless communication method of the amplitude shift keying of one wave (ASK), the resonance frequency band is wide, a special transceiver circuit in the air-core antenna coil also wire diameter tens of microns is proposed an RFID tag that can be used by mounting a conductive member such as a metal or a magnetic material with the CMOS-IC very low power consumption incorporating, it is widely available commercially.

【0048】次に、図5〜図7を用いて、本発明に係るRFIDタグ構造及びRFIDタグの電磁結合器の一例として、シリンダ状のアンテナコイル2bを有するRF Next, with reference to FIGS. 5 to 7, as an example of an electromagnetic coupler of RFID tag structure and RFID tags according to the present invention, RF having a cylindrical antenna coil 2b
IDタグ1bを採用した場合の構成について説明する。 Description will be given of a configuration in the case of adopting the ID tag 1b.

【0049】図5はシリンダ状のアンテナコイル2bを有する棒状のRFIDタグ1bを利用したRFIDタグ構造を示す。 [0049] Figure 5 shows the RFID tag structure utilizing a rod-shaped RFID tag 1b having a cylindrical antenna coil 2b. 図5において、電磁結合器5に内蔵された誘導用コイル6は空心のシリンダ状に形成されており、 5, the induction coil 6 incorporated in the electromagnetic coupler 5 is formed on the air-core cylindrical,
棒状のRFIDタグ1bの装着部5aが誘導用コイル6 For induction mounting portion 5a of the rod-shaped RFID tag 1b coil 6
の内部に形成される断面円形の細長い挿通穴により構成されている。 It is constituted by an elongated insertion hole of circular cross section which is formed within the. 誘導用コイル6は樹脂によりモールドして電磁結合器5に内蔵される。 Induction coil 6 is embedded in the electromagnetic coupler 5 is molded with resin.

【0050】棒状のRFIDタグ1bは断面円形の細長い挿通穴からなる装着部5aに挿入され、接着材等により接着固定され、安定して装着される。 The rod-shaped RFID tag 1b is inserted into the mounting portion 5a made of an elongated through hole of circular cross section, is bonded and fixed by an adhesive or the like, is stably mounted.

【0051】電磁結合器5の内部に埋設された誘導用コイル6の接続端6a,6bは、該電磁結合器5の表面側に露出して設けられた導電性のネジ式のレセプタクル5 The connecting end 6a of the electromagnetic coupler induction coil 6 buried inside the 5, 6b is the receptacle 5 of the electromagnetic coupler 5 exposed to the surface side conductive screw type, provided for the
bに電気的に接続されており、該レセプタクル5bには導電性を有するネジ式のプラグ5cが螺合し得るようになっている。 b is electrically connected to a screw-type plug 5c having conductivity so can screwed into the receptacle 5b.

【0052】一方、ループアンテナ7の接続端7a,7 Meanwhile, connecting end 7a of the loop antenna 7, 7
bには接続端子7cが電気的に接続されている。 Connection terminals 7c are electrically connected to the b. そして、接続端子7cを介在させてプラグ5cをレセプタクル5bに螺合締着することで、接続端子7c、プラグ5 Then, the connection terminals 7c interposed therebetween by screwing fastened plug 5c into the receptacle 5b, the connection terminal 7c, the plug 5
c及びレセプタクル5bを介して誘導用コイル6とループアンテナ7とが直列回路として接続される。 An induction coil 6 and the loop antenna 7 is connected as a series circuit via the c and the receptacle 5b.

【0053】これにより、電磁結合器5の誘導用コイル6を介してループアンテナ7と、RFIDタグ1bのアンテナコイル2bとを電磁結合することが出来る。 [0053] Thus, the loop antenna 7 via the induction coil 6 of the electromagnetic coupler 5, the antenna coil 2b of the RFID tag 1b can be electromagnetically coupled.

【0054】図7に示すように単線巻きでシリンダ状に形成されたアンテナコイル2bの内部には軸方向(図7 [0054] axially inside of the antenna coil 2b formed in the cylinder shape with a single wire winding 7 (FIG. 7
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。 The core member 3 in the lateral direction), such as the iron core or ferrite cylindrical is inserted. 8はRFIDタグ1bの外装となるガラス容器である。 8 is a glass container comprising an exterior of the RFID tag 1b.

【0055】例えば、アンテナコイル2b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2b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2a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。 [0055] For example, as an example of the antenna coil 2b, is wound cylindrical axially multilayer radially copper wire having a diameter of about 30μm is a single line winding, the core member 3 in the interior of the antenna coil 2b inductance in a state where there is at 9.5MH (frequency 125 kHz) degree, the capacitance of the capacitor which is separately connected to a resonance in the antenna coil 2a was about 170PF (frequency 125 kHz).
他の構成は前記実施形態と同様に構成され、同様の効果を得ることが出来るものである。 Other configurations are the same configuration as the above embodiment, but it is possible to obtain the same effect.

【0056】図8は本発明に係るRFIDタグ構造の他の実施形態である。 [0056] FIG. 8 shows another embodiment of an RFID tag structure according to the present invention. 本実施形態では、ループアンテナ7 In this embodiment, the loop antenna 7
をシート状の基材9に固定し、更に該シート状の基材9 Were fixed sheet-like base material 9, further said sheet-like base material 9
に接着等により電磁結合器5を固定し、ループアンテナ7の接続端7a,7bを電磁結合器5のプラグ5cにより誘導用コイル6の接続端6a,6bに電気的に接続し、電磁結合器5の装着部5aに適宜、RFIDタグ1 The electromagnetic coupler 5 by bonding or the like and fixed, and electrically connected to connecting end 7a of the loop antenna 7 and 7b connecting end 6a of the induction coil 6 by the plug 5c of electromagnetic coupler 5 and 6b, the electromagnetic coupler suitably the mounting portion 5a of the 5, RFID tag 1
a,1bを固定したものである。 a, it is those with a fixed 1b.

【0057】ループアンテナ7は、例えば、0.3mmの銅縒り線を塩化ビニル樹脂、ポリエチレン、ポリプロピレン等の軟質のプラスチックシートからなる基材9にラミネートして固定したものを採用することが出来る。 [0057] Loop antenna 7, for example, can be adopted as fixed by laminating a copper twisted wire 0.3mm vinyl chloride resin, polyethylene, to a substrate 9 made of a plastic sheet of soft polypropylene.

【0058】本実施形態では、図8に示すように、シート状の基材9を細長い形状で構成した一例について説明するが、四角形や円形等の各種の形状のシート状の基材9にループアンテナ7を所望のループ形状で固定して構成しても良い。 [0058] In the present embodiment, as shown in FIG. 8, will be described one example in which the sheet-like base material 9 in the elongated shape, a square or a circle or the like of various shapes of sheet-like loops substrate 9 the antenna 7 may be formed by fixing a desired loop shape. また、ループアンテナ7の表面側に更に保護膜を形成しても良い。 It is also possible to form a further protective layer on the surface side of the loop antenna 7.

【0059】本実施形態では、シート状の基材9の4隅に固定用のビス穴9aが形成された一例であるが、シート状の基材9の裏面側に接着層及び離型層を積層して形成し、ループアンテナ7を固定したシート状の基材9を目的の場所に設置する際に離型層を除去して接着層を露出させ、接着して固定する構成でも良い。 [0059] In the present embodiment, an example of screw holes 9a for fixing are formed at four corners of a sheet-like base material 9, the adhesive layer and the release layer on the back side of the sheet substrate 9 stacked together to form, by removing the release layer when installing the loop antenna 7 sheet-like base material 9 which is fixed to a desired location to expose the adhesive layer may be configured to fix by adhesion.

【0060】図9は図8に示すRFIDタグ構造を複数直列に配列し、無人車や走行ロボット10等の走行用の誘導レールを形成した一例である。 [0060] FIG. 9 shows an example of arranging the RFID tag structure more series, to form a guide rail for running, such as unmanned vehicles and traveling robot 10 shown in FIG. 無人車や走行ロボット Unmanned vehicles and traveling robot
10には、RFIDタグ1a,1bの情報を読み取るリーダ機12と、マイクロコンピュータ(マイコン)が搭載されており、各RFIDタグ1a,1bに記憶された位置情報を読み取って、予めプログラムされた条件に従って走行し、或いは所定の位置に停止する自動運行を行なうように制御することが出来る。 The 10, a reader 12 for reading the RFID tag 1a, 1b information, microcomputer and is mounted, by reading the position information stored in the RFID tag 1a, 1b, preprogrammed conditions It travels accordingly or predetermined may be controlled to perform an automatic operation to stop the position.

【0061】また、その他の応用例としては、盗難防止システムが考えられる。 [0061] Further, as other applications, it can be considered anti-theft system. 例えば、室内にループアンテナ7を張り巡らせておき、商品にRFIDタグ1a,1b For example, advance stretched around the loop antenna 7 in the room, RFID tag 1a to the product, 1b
の情報を読み取るリーダ機12を取り付け、商品が室内から外に持ち出された時にリーダ機12がRFIDタグ1 Attach the reader 12 for reading the information, the reader 12 the RFID tag 1 when a product is taken out from the chamber to the outside
a,1bとの通信を絶たれて警報を発するように構成することも出来る。 a, cut off the communication between 1b and can also be configured to issue an alarm.

【0062】 [0062]

【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、簡単な構造で、且つ低コストでRFIDタグの通信可能距離をループアンテナの大きさや形状により任意に延長、拡大することが出来、該RFIDタグの利用分野を広げることが出来る。 According to the present invention, because it has a working and such above-described configuration, a simple structure, and optionally extended by the size and shape of the communicable distance of the loop antenna of the RFID tag at a low cost, to enlarge is possible, it is possible to widen the use field of the RFID tag.

【0063】即ち、RFIDタグに電磁結合器を介して全方向から通信が可能なループアンテナを電磁的に結合し、そのループアンテナの作用によりRFIDタグの通信可能距離を任意に拡大することが出来る。 [0063] That is, a loop antenna capable of communicating from all directions through the electromagnetic coupler electromagnetically coupled to the RFID tag, can arbitrarily be enlarged communicable distance of the RFID tag by the action of the loop antenna .

【0064】また、標準として市販されているRFID [0064] Moreover, RFID commercially available as standard
タグを、そのまま使用して構成出来、電磁結合器の装着部にRFIDタグを装着するだけで、そのアンテナコイルとループアンテナとを安定して電磁結合させることが出来るので施工が簡単になり、長時間安定に作動させることが出来る。 Tag, it can be configured using, simply attaching the RFID tag to the mounting portion of the electromagnetic coupler, since the its antenna coil and the loop antenna stable can be electromagnetically coupled construction is simplified, the long it can be time stable working.

【0065】また、予めRFIDタグを電磁結合器の装着部に装着した状態とすることにより管理、保管、運搬及び施工がより容易に出来る。 [0065] The management by the state of mounting the pre RFID tags to the mounting portion of the electromagnetic coupler, storage, transportation and installation more easily.

【0066】更に電磁結合器に予めループアンテナも接続して、電磁結合器、RFIDタグ及びループアンテナをユニット化することも出来、これにより管理、保管、 [0066] In further connected beforehand loop antenna to the electromagnetic coupler, electromagnetic coupler, can also be unitized RFID tag and the loop antenna, thereby managing, storing,
運搬及び施工を更に簡単化することが出来る。 It is possible to further simplify the transport and construction.

【0067】また、アンテナコイルがシリンダ状または同心円盤状に形成された場合には、市販されたRFID [0067] Further, when the antenna coil is formed on the cylindrical or concentric plate shape, commercially available RFID-
タグを使用出来るので入手が容易で大量生産によりコストダウンを図ることが出来る。 Because you can use the tags to obtain it is possible to reduce the cost by easy and mass production.

【0068】また、ループアンテナがシート状の基材に固定された場合には、シート状の基材に固定されたループアンテナを特定の形状に容易に形成することが出来るので設置若しくは布設が容易に出来る。 [0068] Also, when the loop antenna is fixed to the sheet-like base material, easy to install or laying since a loop antenna that is fixed to the sheet substrate can be easily formed into a particular shape It can be in.

【0069】また、本発明に係るRFIDタグの電磁結合器を用いて上述のRFIDタグ構造を容易に構成することが出来る。 [0069] Further, it is possible to easily configure the RFID tag structure described above using an electromagnetic coupler of the RFID tag according to the present invention.

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

【図1】同心円盤状のアンテナコイルを有するRFID [1] RFID with concentric plate-shaped antenna coil
タグに適用した本発明に係るRFIDタグ構造を示す断面説明図である。 It is a cross-sectional view of an RFID tag structure according to the present invention applied to the tag.

【図2】同心円盤状のアンテナコイルを有するRFID [Figure 2] RFID with concentric plate-shaped antenna coil
タグに適用した電磁結合器の構成を示す斜視図である。 Is a perspective view showing a configuration of an electromagnetic coupler is applied to the tag.

【図3】(a)は同心円盤状のアンテナコイルを有するRFIDタグの構成を示す平面図、(b)は同心円盤状のアンテナコイルを有するRFIDタグに発生する磁界の様子を示す模式図である。 3 (a) is a plan view showing the configuration of an RFID tag having a concentric plate-shaped antenna coil, (b) is a schematic diagram showing the magnetic field generated in the RFID tag having a concentric plate-shaped antenna coil is there.

【図4】RFIDタグの制御系の構成を示すブロック図である。 4 is a block diagram showing a configuration of a control system of the RFID tag.

【図5】(a),(b)はシリンダ状のアンテナコイルを有するRFIDタグに適用した本発明に係るRFID [5] (a), (b) the RFID according to the present invention applied to a RFID tag having a cylindrical antenna coil
タグ構造を示す断面説明図及び平面説明図である。 It is a cross sectional view and a plan view showing a tag structure.

【図6】シリンダ状のアンテナコイルを有するRFID [6] RFID having a cylindrical antenna coil
タグに適用した電磁結合器の構成を示す斜視説明図である。 Tag is a perspective view showing a configuration of an electromagnetic coupler applied to.

【図7】シリンダ状のアンテナコイルを有するRFID [7] RFID having a cylindrical antenna coil
タグの構成及びこれに発生する磁界の様子を示す模式図である。 It is a schematic diagram illustrating the configuration and the magnetic field generated to the tag.

【図8】(a)はループアンテナがシート状の基材に固定され、該シート状の基材に取り付けられた電磁結合器にRFIDタグが装着されたRFIDタグ構造において該シート状の基材が巻回された使用前の状態を示す側面図、(b),(c)は使用に際して図8(a)のシート状の基材を伸ばした状態を示す側面図及び平面図である。 8 (a) is a loop antenna is fixed to the sheet substrate, said sheet substrate in an RFID tag structure RFID tag is attached to an electromagnetic coupler attached to said sheet substrate There side view showing a state before use wound, a side view and a plan view showing a state in which stretched sheet substrate of (b), (c) 8 in use (a).

【図9】図8に示すRFIDタグ構造を複数直列に配列して無人車や走行ロボット等の誘導レールを形成した一例を示す平面模式図である。 9 is a schematic plan view showing an example of forming the guide rail such unmanned vehicle and driving the robot by arranging an RFID tag structure more series shown in FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

1a,1b…RFIDタグ 2a,2b…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…電磁結合器 5a…装着部 5b…レセプタクル 5c…プラグ 6…誘導用コイル 6a,6b…接続端 7…ループアンテナ 7a,7b…接続端 7c…接続端子 8…ガラス容器 9…シート状の基材 9a…ビス穴 10…無人車や走行ロボット 11…接着材 12…リーダ機 1a, 1b ... RFID tags 2a, 2b ... antenna coil 3 ... core member 4 ... semiconductor IC chip 4a ... CPU 4b ... memory 4c ... transceiver 4d ... capacitor 5 ... electromagnetic coupler 5a ... attachment portion 5b ... receptacle 5c ... plug 6 ... induction coil 6a, 6b ... connection end 7 ... loop antenna 7a, 7b ... connection end 7c ... connection terminal 8 ... glass container 9 ... sheet substrate 9a ... screw holes 10 ... unmanned vehicle or mobile robot 11 ... adhesive 12 ... reader

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 2C005 HA02 HB10 JA03 LA25 LB34 5B035 BA03 BB09 CA01 CA23 5B058 CA17 KA24 5K012 AA03 AB03 AC06 AC08 AC10 BA02 ────────────────────────────────────────────────── ─── front page of continued F-term (reference) 2C005 HA02 HB10 JA03 LA25 LB34 5B035 BA03 BB09 CA01 CA23 5B058 CA17 KA24 5K012 AA03 AB03 AC06 AC08 AC10 BA02

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 アンテナコイルを有するRFIDタグと、ループアンテナと、前記アンテナコイルと前記ループアンテナとを電磁結合するための電磁結合器とを備え、前記電磁結合器本体に誘導用コイルと、その誘導用コイルに前記RFIDタグのアンテナコイルを接近配置して電磁結合する装着部とが設けられ、前記誘導用コイルの接続端と、前記ループアンテナの接続端とが直列接続されることを特徴とするRFIDタグ構造。 An RFID tag having a 1. A antenna coil, a loop antenna, and the loop antenna and the antenna coil and an electromagnetic coupler for electromagnetically coupling an induction coil in the electromagnetic coupler body, the a mounting portion for the electromagnetic coupling is provided an antenna coil of the RFID tag to the induction coil closely disposed, the connection end of the induction coil, the connecting end of the loop antenna and being connected in series RFID tag structure.
  2. 【請求項2】 前記アンテナコイルがシリンダ状または同心円盤状に形成されたことを特徴とする請求項1に記載のRFIDタグ構造。 2. A RFID tag structure according to claim 1, wherein the antenna coil is formed in a cylinder shape or concentric discotic.
  3. 【請求項3】 前記ループアンテナがシート状の基材に固定されたことを特徴とする請求項1または請求項2に記載のRFIDタグ構造。 3. The RFID tag structure according to claim 1 or claim 2, wherein the loop antenna is fixed to the sheet-like base material.
  4. 【請求項4】 RFIDタグのアンテナコイルと、ループアンテナとを電磁結合するための電磁結合器であって、電磁結合器本体に、誘導用コイルと、該誘導用コイルに前記RFIDタグのアンテナコイルを接近配置して電磁結合する装着部とを備え、前記誘導用コイルの接続端に前記ループアンテナの接続端が接続出来るように構成したことを特徴とするRFIDタグの電磁結合器。 An antenna coil 4. A RFID tag, an electromagnetic coupler for the loop antenna electromagnetically coupled to the electromagnetic coupler body, an induction coil, of the RFID tag to the induction coil antenna coil the close arrangement and a mounting portion for electromagnetic coupling, electromagnetic coupler of the RFID tag connecting end of the loop antenna to the connection end of the induction coil is characterized by being configured to allow connection.
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