JP2008140216A - Ic tag reader - Google Patents

Ic tag reader Download PDF

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Publication number
JP2008140216A
JP2008140216A JP2006326708A JP2006326708A JP2008140216A JP 2008140216 A JP2008140216 A JP 2008140216A JP 2006326708 A JP2006326708 A JP 2006326708A JP 2006326708 A JP2006326708 A JP 2006326708A JP 2008140216 A JP2008140216 A JP 2008140216A
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Japan
Prior art keywords
radio wave
rfid antenna
rfid
wall
wave absorption
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JP2006326708A
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Japanese (ja)
Inventor
Toshio Kudo
敏夫 工藤
Kazuyuki Kashiwabara
一之 柏原
Masahiro Fukui
政博 福井
Katsunobu Hosoya
勝宣 細谷
Nobukatsu Nishida
伸克 西田
Kiyoyuki Sasaki
清幸 佐々木
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Mitsubishi Cable Industries Ltd
Sagawa Printing Co Ltd
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Mitsubishi Cable Industries Ltd
Sagawa Printing Co Ltd
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Application filed by Mitsubishi Cable Industries Ltd, Sagawa Printing Co Ltd filed Critical Mitsubishi Cable Industries Ltd
Priority to JP2006326708A priority Critical patent/JP2008140216A/en
Priority to US12/517,185 priority patent/US20100073141A1/en
Priority to PCT/JP2007/073324 priority patent/WO2008069175A1/en
Priority to DE112007002942T priority patent/DE112007002942T5/en
Publication of JP2008140216A publication Critical patent/JP2008140216A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC tag reader for restricting a region for suppressing the influence of a reflected wave, and for reading an IC tag by controlling the propagation region of an electric wave. <P>SOLUTION: An RFID antenna 8 for reading information stored in an RFID tag 7 is arranged at one side of a passage part 13 through which an identification object body 10 to which an RFID tag 7 is attached passes. Furthermore, a vertical electric wave absorption front wall 2 and an electric wave absorption rear wall 3 for narrowing down the half-value angle of the plane view of an electric wave to be emitted from the RFID antenna 8 are formed so as to be protruded from the neighborhood of the front edge and rear edge of the RFID antenna 8 to the passage part 13 side. An electric wave absorption side wall 1 is arranged at the other side with the passage part 13 interposed. Then, a control latter value angle is calculated as 40° or less by narrowing down the half-value angle of a circularly polarized wave to be emitted from the RFID antenna 8 by the pair of electric wave absorption front wall 2 and the electric wave absorption rear wall 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ICタグ読取装置に関するものである。   The present invention relates to an IC tag reader.

近年、数cm程度のICチップを埋め込んだタグに情報を記憶させ、電磁波又は電磁界を介して非接触で情報を読み取るシステム(RFID)が、バーコードに換わる次世代の識別技術として使用され、読取を行うためのICタグ読取装置が従来より知られている(例えば、特許文献1、2参照)。そして、物流における物品のトレーサビリティ管理、図書館における蔵書管理その他の様々な分野での応用が期待されている。
特開2005−267077公報 特開2006− 20083公報
In recent years, a system (RFID) that stores information in a tag embedded with an IC chip of about several centimeters and reads information in a non-contact manner via electromagnetic waves or electromagnetic fields has been used as a next-generation identification technology that replaces barcodes. 2. Description of the Related Art Conventionally, an IC tag reader for reading is known (see, for example, Patent Documents 1 and 2). And it is expected to be applied in various fields such as goods traceability management in logistics, library collection management in libraries, and so on.
JP 2005-267077 A JP 2006-20083 A

従来のUHF帯( 800MHz〜 960MHz)用ICタグ読取装置は、通信距離を大きく確保できる点が大きな利点の一つであるが、その反面、通信領域が広いために、読取を所望しない場所に存在するICタグの情報まで読み取ってしまうという問題や、隣接する同種システム間の干渉により正しくICタグの情報を読み出せないという問題や、さらに、様々な周辺構造物からの反射波と送受信アンテナからの直接波が合成し、特に弱め合うポイント(Null点)ではICタグが無応答となるという問題があった。これらの問題から、電磁環境を如何に制御するかが課題となっていた。   Conventional UHF band (800 MHz to 960 MHz) IC tag readers are one of the great advantages of being able to secure a large communication distance, but on the other hand, they are located in places where reading is not desired due to the wide communication area. The problem of reading even IC tag information, the problem that IC tag information cannot be read correctly due to interference between adjacent similar systems, and the reflected waves from various peripheral structures and the transmission / reception antenna There is a problem that the IC tag becomes unresponsive at the point where the direct wave is synthesized and weakens (Null point). From these problems, how to control the electromagnetic environment has become a problem.

そこで、本発明は、反射波の影響を抑えると共に、電波の伝播領域を制御してICタグを読み取る領域を制限するICタグ読取装置を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide an IC tag reader that suppresses the influence of reflected waves and restricts the area for reading an IC tag by controlling the propagation area of radio waves.

上記目的を達成するために、本発明に係るICタグ読取装置は、RFIDタグを付設した被識別体が通過する通路部の一側に、上記RFIDタグに記憶させた情報を読み取るRFIDアンテナを配設し、さらに、該RFIDアンテナから放射される電波の平面視の半値角を狭める鉛直状電波吸収前壁・電波吸収後壁を、該RFIDアンテナの前縁・後縁近傍から上記通路部側へ突出状として設け、かつ、上記通路部を挟んで他側に電波吸収側壁を配設したものである。なお、通路部の上部若しくは天井部にRFIDアンテナを配設することも望ましい。   In order to achieve the above object, an IC tag reader according to the present invention has an RFID antenna that reads information stored in an RFID tag on one side of a passage portion through which an identification target provided with the RFID tag passes. In addition, the vertical wave absorption front wall and the radio wave absorption rear wall that narrow the half-value angle of the radio wave radiated from the RFID antenna in plan view are moved from the vicinity of the front edge and rear edge of the RFID antenna toward the passage portion side. It is provided as a protruding shape, and a radio wave absorption side wall is disposed on the other side across the passage portion. In addition, it is also desirable to arrange an RFID antenna on the upper part or ceiling part of the passage part.

また、本発明に係るICタグ読取装置は、RFIDタグを付設した被識別体が通過する通路部の両側に夫々、上記RFIDタグに記憶させた情報を読み取るRFIDアンテナを配設し、さらに、各該RFIDアンテナから放射される電波の平面視の半値角を狭める鉛直状電波吸収前壁・電波吸収後壁を、該RFIDアンテナの前縁・後縁近傍から上記通路部側へ突出状として設け、かつ、上記通路部を挟んで各該RFIDアンテナの反対側に電波吸収側壁を配設したものである。なお、通路部の上部若しくは天井部にRFIDアンテナを配設することも望ましい。   Further, the IC tag reading device according to the present invention is provided with RFID antennas for reading information stored in the RFID tag on both sides of the passage portion through which the identification object provided with the RFID tag passes, respectively, A vertical radio wave absorption front wall and a radio wave absorption rear wall that narrows the half-value angle of the radio wave radiated from the RFID antenna in a plan view are provided as protruding from the vicinity of the front edge and the rear edge of the RFID antenna toward the passage portion side, In addition, a radio wave absorption side wall is disposed on the opposite side of each RFID antenna across the passage portion. In addition, it is also desirable to arrange an RFID antenna on the upper part or ceiling part of the passage part.

また、上記RFIDアンテナから放射される電波の半値角が一対の上記電波吸収前壁・後壁によって狭められた制御後半値角を、40°以下とした。   Further, the control second half value angle in which the half value angle of the radio wave radiated from the RFID antenna is narrowed by the pair of the radio wave absorption front and rear walls is set to 40 ° or less.

本発明は、次のような著大な効果を奏する。
本発明に係るICタグ読取装置は、通路部の一側に設けたRFIDアンテナから放射される電波の平面視の半値角を狭める鉛直状電波吸収前壁・電波吸収後壁を、RFIDアンテナの前縁・後縁近傍から通路部側へ突出状として設け、かつ、通路部を挟んで他側に電波吸収側壁を配設したので、簡易な構成でありながら、放射した電波を制御(ゾーンコントロール)でき、所望しない場所にあるタグ情報の読み取りを防ぐことができる。また、隣接する別のアンテナから放射した電波との干渉も防がれる。さらに、読取可能領域にNull点が発生することもないので、タグ情報の読取漏れを防ぐことができる。よって、通信領域が大きなFRIDシステムにおける物流において、識別を所望する物品(被識別体)の正確な管理を確実に行うことができる。
The present invention has the following remarkable effects.
The IC tag reading device according to the present invention includes a vertical radio wave absorption front wall and a radio wave absorption rear wall that narrow a half-value angle in a plan view of radio waves radiated from an RFID antenna provided on one side of a passage portion. Protruding from the vicinity of the edge / rear edge to the passage side, and a radio wave absorption side wall is provided on the other side across the passage part, so the emitted radio waves are controlled (zone control) with a simple configuration It is possible to prevent reading tag information in an undesired place. Also, interference with radio waves radiated from another adjacent antenna can be prevented. Further, since no Null point occurs in the readable area, it is possible to prevent reading of tag information from being missed. Therefore, in the logistics in the FRID system having a large communication area, it is possible to reliably manage an article (identified object) that is desired to be identified.

以下、実施の形態を示す図面に基づき、本発明を詳説する。
図1〜図5は本発明に係るICタグ読取装置の実施の一形態を示し、このICタグ読取装置は、RFIDタグ7を付設した被識別体10が通過する通路部13の一側に、RFIDタグ7に記憶させた情報を読み取るUHF帯( 800MHz〜 960MHz)用のRFIDアンテナ8が配設されている。RFIDアンテナ8は、その電波放射面28が通路部13の向き(被識別体10の通路方向12)と平面視で平行状となると共に、その給電点18が床面から所定(例えば、1300mm)の高さ位置となるように図示省略の保持部材によって保持される。
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
1 to 5 show an embodiment of an IC tag reading device according to the present invention. This IC tag reading device is arranged on one side of a passage portion 13 through which an identification target 10 provided with an RFID tag 7 passes. An RFID antenna 8 for UHF band (800 MHz to 960 MHz) for reading information stored in the RFID tag 7 is provided. The radio wave radiation surface 28 of the RFID antenna 8 is parallel to the direction of the passage portion 13 (the passage direction 12 of the identification target 10) in plan view, and the feeding point 18 is predetermined (for example, 1300 mm) from the floor surface. It is held by a holding member (not shown) so as to be at the height position.

上述のように、RFIDアンテナ8は電波を送受信するUHF帯R/W用であり、従来のRFIDシステム( 13.56MHz帯、2.45GHz帯等)に比べて遠方まで伝播可能という特性を有し、通信距離をより長く確保できるものである。RFIDアンテナ8の筐体11は、長辺が 700mm〜 730mmで、短辺が 300mm〜 330mmで、厚さが35mm〜45mmの矩形平板状を有し、アルミニウムケースと塩ビカバーを有する。給電点18廻りに斜線で描いた円形の範囲は電波放射範囲であり、給電点18はこの範囲の中心点よりも僅かに下方に位置する。   As described above, the RFID antenna 8 is for UHF band R / W that transmits and receives radio waves, and has a characteristic that it can propagate farther than conventional RFID systems (13.56 MHz band, 2.45 GHz band, etc.) A longer distance can be secured. The casing 11 of the RFID antenna 8 has a rectangular flat plate shape having a long side of 700 mm to 730 mm, a short side of 300 mm to 330 mm, and a thickness of 35 mm to 45 mm, and has an aluminum case and a PVC cover. A circular range drawn with diagonal lines around the feeding point 18 is a radio wave radiation range, and the feeding point 18 is located slightly below the center point of this range.

また、通路部13の(下方)床面には、放射電波の床面による反射を防ぐ電波吸収床部材15を設置しても良い。また、通路部13の(上方)天井側には、電波の漏れを防ぐ電波吸収天井部材16を設置しても良い。   Further, a radio wave absorbing floor member 15 that prevents reflection of radiated radio waves from the floor surface may be installed on the (lower) floor surface of the passage portion 13. Further, a radio wave absorbing ceiling member 16 that prevents leakage of radio waves may be installed on the (upper) ceiling side of the passage portion 13.

そして、図1,図2,図4,図5において、本発明の装置は、RFIDアンテナ8から放射される電波の平面視のビーム領域6の半値角θを狭める鉛直状電波吸収前壁2・電波吸収後壁3が、RFIDアンテナ8の前縁・後縁近傍から通路部13側へ突出状として設けられる。
具体的には、電波吸収前壁2・後壁3は矩形平板状を有すると共に、前壁2・後壁3は、RFIDアンテナ8を前後中央位置に挟んだ状態で、かつ、RFIDアンテナ8に直交状(通路方向12に直交状)として、設けられる。前壁2と後壁3の夫々の(通路部13側)縦辺部20,30は、通路部13側へ同じ位置まで突出している。
なお、本発明においては、RFIDアンテナ8から通路部13を見た場合の左側を前側とし、右側を後側とする。
1, 2, 4, and 5, the apparatus of the present invention has a vertical radio wave absorption front wall 2 that narrows the half-value angle θ of the beam region 6 in plan view of radio waves radiated from the RFID antenna 8. The radio wave absorbing rear wall 3 is provided in a protruding shape from the vicinity of the front and rear edges of the RFID antenna 8 toward the passage portion 13.
Specifically, the radio wave absorption front wall 2 and the rear wall 3 have a rectangular flat plate shape, and the front wall 2 and the rear wall 3 have the RFID antenna 8 sandwiched between the front and rear center positions and are attached to the RFID antenna 8. It is provided as an orthogonal shape (perpendicular to the passage direction 12). The vertical side portions 20 and 30 of the front wall 2 and the rear wall 3 (on the side of the passage portion 13) project to the same position toward the passage portion 13 side.
In the present invention, the left side when the passage portion 13 is viewed from the RFID antenna 8 is the front side, and the right side is the rear side.

また、RFIDアンテナ8の給電点18は、前後方向中央に設けられている場合、即ち、前壁2と給電点18との前後方向寸法W1 と、後壁3と給電点18との前後方向寸法W2 とが同じ大きさに設定されている場合(図2〜図5参照)と、W1 <W2 (図12〜図15参照)や、W2 <W1 となるように設定される場合がある。なお、実施例のRFIDアンテナ8は、一点の給電点18において電波の送信・受信を行うものであるが、送信ポイントと受信ポイントが分離した位置に設けられたアンテナを用いてもよく、送信ポイントが本発明の給電点18に相当する(図示省略)。 Further, when the feeding point 18 of the RFID antenna 8 is provided at the center in the front-rear direction, that is, the front-rear dimension W 1 between the front wall 2 and the feeding point 18 and the front-rear direction between the rear wall 3 and the feeding point 18. When the dimension W 2 is set to the same size (see FIGS. 2 to 5), W 1 <W 2 (see FIGS. 12 to 15), or W 2 <W 1 is set. There is a case. The RFID antenna 8 of the embodiment performs transmission / reception of radio waves at a single feeding point 18, but an antenna provided at a position where the transmission point and the reception point are separated may be used. Corresponds to the feeding point 18 of the present invention (not shown).

そして、θは、前壁2・後壁3が設けられていない場合にRFIDアンテナ8から放射される電波の半値角であり、6は、半値角θを成すビーム領域である。ビーム領域6が、RFIDアンテナ8の電波放射面28に対する法線よりも僅かに前側へ傾いているのはアンテナの放射特性による。
そして、θcは、RFIDアンテナ8から放射される電波の半値角θが前壁2・後壁3によって狭められた(ゾーンコントロールされた)制御後半値角であり、20°〜40°となるように設定される。ゾーンコントロールされた制御領域9を点々で示した。
制御後半値角θcが40°を超過すると、電波が拡がり過ぎるため、読取対象外の範囲にあるタグの情報まで読んでしまう虞れがある。
一方、制御後半値角θcに下限をもたせることにより、電波の拡がりを一定量保つことができ、ゲートを通るRFIDタグの読み取り領域(距離、通過時間)を長く確保できることから、読取漏れを確実に防ぐことができる。この観点からは、制御後半値角θcは、20°以上とすることがより好ましい。
なお、半値角は、一番強く電波が出て行く点を基準として、これが電力で半分の値(最大電力から3dBを引いた値)になる点でつくる角度であり、ビームの鋭さを表す。
Θ is a half-value angle of the radio wave radiated from the RFID antenna 8 when the front wall 2 and the rear wall 3 are not provided, and 6 is a beam region forming the half-value angle θ. It is due to the radiation characteristics of the antenna that the beam region 6 is inclined slightly forward from the normal to the radio wave radiation surface 28 of the RFID antenna 8.
Θc is a control second half angle angle in which the half-value angle θ of the radio wave radiated from the RFID antenna 8 is narrowed (zone-controlled) by the front wall 2 and the rear wall 3, and is set to 20 ° to 40 °. Set to A zone-controlled control area 9 is indicated by dots.
When the control second half value angle θc exceeds 40 °, the radio wave spreads too much, and there is a possibility that even information on a tag in a range not to be read may be read.
On the other hand, by setting a lower limit to the control second half value angle θc, it is possible to maintain a certain amount of radio wave spread, and to ensure a long reading area (distance, passage time) of the RFID tag that passes through the gate, thereby ensuring reading omissions. Can be prevented. From this point of view, the control second half value angle θc is more preferably set to 20 ° or more.
The half-value angle is an angle formed at a point where the power is half the value (a value obtained by subtracting 3 dB from the maximum power) with reference to the point at which the radio wave is emitted most strongly, and represents the sharpness of the beam.

また、前壁2・後壁3の突出寸法Lは、制御後半値角θcが上記の範囲を満たす条件の下で、電気長にて 0.5×λ〜3×λ(λは電波の波長を示す)に設定され、かつ、前壁2・後壁3とRFIDアンテナ8の前端縁・後端縁との間隔寸法は、同様の条件の下で、 0.5×λ以下(0は当接した状態)に設定される。アンテナ8の前端縁と前壁2、及び、アンテナ8の後端縁と後壁3とは、夫々間隙を有するように設けられる場合(図1〜図5参照)と、隙間無く(当接状に)設けられる場合(図12〜図14参照)がある。例えば、 953MHZの場合、Lが 150mmのとき約0.48×λで表される。 The protrusion dimension L of the front wall 2 and the rear wall 3 is 0.5 × λ to 3 × λ in terms of electrical length under the condition that the control second half angle θc satisfies the above range (λ indicates the wavelength of radio waves). ) And the distance between the front wall 2 / rear wall 3 and the front edge / rear edge of the RFID antenna 8 is 0.5 × λ or less (0 is in contact) under the same conditions. Set to When the front end edge and the front wall 2 of the antenna 8 and the rear end edge and the rear wall 3 of the antenna 8 are provided so as to have a gap (see FIGS. 1 to 5), there is no gap (abutting shape). (See FIG. 12 to FIG. 14). For example, if the 953MH Z, L is represented by about 0.48 × lambda when 150 mm.

電波吸収前壁2・後壁3は、例えば、ポリカーボネート、粘着材、Ag膜、PET、空隙部(を有する部材)、PET、ITO膜、粘着材、ポリカーボネートを順次積層して形成される。   The radio wave absorption front wall 2 and rear wall 3 are formed by sequentially laminating, for example, polycarbonate, an adhesive material, an Ag film, PET, a void (a member having a gap), PET, an ITO film, an adhesive material, and polycarbonate.

さらに、図1,図2,図4において、本発明の装置は、RFIDアンテナ8から通路部13を挟んで他側に設けられた平板形状の電波吸収側壁1を具備する。電波吸収側壁1は、RFIDアンテナ8の電波放射面28と平行状に立設されている。この側壁1の上下端辺と、電波吸収天井部材16・床部材15の他端辺とを夫々隙間無く連結することで、電波の漏れが防がれる。
また、電波吸収側壁1の前後方向の長さ寸法Pは、前壁2・後壁3が設けられた状態において制御後半値角θcのビーム領域6に対応するように形成される。即ち、RFIDアンテナ8と側壁1との距離をXとすると、P≧2Xtan(θc/2)の式を満たすように形成される。そして、側壁1は、ビーム領域6内の電波を漏れなく受けることができるように設置される。
1, 2, and 4, the apparatus of the present invention includes a flat plate-shaped radio wave absorption side wall 1 that is provided on the other side of the RFID antenna 8 across the passage portion 13. The radio wave absorption side wall 1 is erected in parallel with the radio wave radiation surface 28 of the RFID antenna 8. Leakage of radio waves can be prevented by connecting the upper and lower ends of the side wall 1 and the other end sides of the radio wave absorbing ceiling member 16 and the floor member 15 without any gaps.
Further, the length dimension P in the front-rear direction of the radio wave absorption side wall 1 is formed so as to correspond to the beam region 6 of the control second half value angle θc in the state where the front wall 2 and the rear wall 3 are provided. That is, when the distance between the RFID antenna 8 and the side wall 1 is X, it is formed so as to satisfy the formula of P ≧ 2Xtan (θc / 2). And the side wall 1 is installed so that the electromagnetic wave in the beam area | region 6 can be received without a leak.

図6〜図8は他の実施例を示し、図1〜図5の装置との相違点は、RFIDアンテナ8から放射されるビーム領域6の上方領域や下方領域を狭める電波吸収上壁4や下壁5が設けられた点である。
図6は、アンテナ8の上方に、RFIDアンテナ8から通路部13側へ突出状として水平状の電波吸収上壁4が、設けられる。上壁4は、その(通路部13側)縦辺部40が前壁2・後壁3の縦辺部20,30と同じ位置まで通路部13側へ突出している。図7は、アンテナ8の下方に、RFIDアンテナ8から通路部13側へ突出状として水平状の電波吸収下壁5が、設けられる。下壁5は、その(通路部13側)縦辺部50が前壁2・後壁3の縦辺部20,30と同じ位置まで通路部13側へ突出している。図8では、電波吸収上壁4及び下壁5が、図6,図7で説明したと同じ構成で設けられている。
上壁4と下壁5を設けることで、電波の垂直成分が上方・下方へ拡がる角度を制御でき、一層、他のタグの読取防止や、他の同種システムとの干渉防止も図り得る。
FIGS. 6 to 8 show other embodiments, and the difference from the apparatus of FIGS. 1 to 5 is that the radio wave absorption upper wall 4 that narrows the upper region and the lower region of the beam region 6 radiated from the RFID antenna 8 The lower wall 5 is provided.
In FIG. 6, a horizontal radio wave absorption upper wall 4 is provided above the antenna 8 so as to protrude from the RFID antenna 8 toward the passage portion 13. The upper wall 4 has a vertical side portion 40 (on the side of the passage portion 13) protruding toward the passage portion 13 to the same position as the vertical side portions 20 and 30 of the front wall 2 and the rear wall 3. In FIG. 7, a horizontal radio wave absorption lower wall 5 is provided below the antenna 8 so as to protrude from the RFID antenna 8 toward the passage portion 13. The lower wall 5 has a vertical side portion 50 (on the side of the passage portion 13) protruding toward the passage portion 13 to the same position as the vertical side portions 20 and 30 of the front wall 2 and the rear wall 3. In FIG. 8, the radio wave absorption upper wall 4 and the lower wall 5 are provided in the same configuration as described in FIGS.
By providing the upper wall 4 and the lower wall 5, it is possible to control the angle at which the vertical component of the radio wave spreads upward and downward, and to further prevent reading of other tags and interference with other similar systems.

図9〜図11は、前壁2・後壁3の別の実施例を示す。図9では、前壁2・後壁3は、両者の間隔が通路部13側へテーパ状に狭くなる平面視ハの字状に設けられている。図10の装置は、前壁2・後壁3は、両者の間隔が通路部13側へテーパ状に拡がる平面視ハの字状に設けられている。また、図11の装置は、平行な前壁2・後壁3の縦辺部20,30が、夫々前後方向内側に小さく折曲られている。図9〜図11の実施例においても、図6〜図8で説明した上壁4や下壁5を組み合わせて設けてもよい。   9 to 11 show another embodiment of the front wall 2 and the rear wall 3. In FIG. 9, the front wall 2 and the rear wall 3 are provided in a letter C shape in a plan view in which the distance between them is tapered toward the passage portion 13 side. In the apparatus of FIG. 10, the front wall 2 and the rear wall 3 are provided in a letter C shape in plan view in which the distance between the two extends in a tapered shape toward the passage portion 13 side. Further, in the apparatus of FIG. 11, the vertical side portions 20 and 30 of the parallel front wall 2 and rear wall 3 are bent slightly inward in the front-rear direction. Also in the embodiment of FIGS. 9 to 11, the upper wall 4 and the lower wall 5 described in FIGS. 6 to 8 may be provided in combination.

図19は本発明のICタグ読取装置の他の実施の形態を示し、図1,図2,図4の装置との相違点は、通路部13の両側に夫々、RFIDアンテナ8を配設し、かつ、通路部13を挟んで各RFIDアンテナ8の反対側に電波吸収側壁1を配設した点である。一側・他側のRFIDアンテナ8A,8Bは、夫々の電波放射面28,28が平行かつ対向状になるように、同じ高さ位置に設けられる。また、各側板1は、各RFIDアンテナ8の裏側(通路部13から見て反対側)近傍に立設され、一側に設けた電波吸収側壁1Aと、他側に設けた電波吸収側壁1Bは、図1〜図4で説明した側壁1と同様の形状を有し、かつ、相互に平行に立設されている。また、一側・他側の夫々において、RFIDアンテナ8と前壁2・後壁3の位置関係は、図1〜図5で説明した構成と同じである。なお、図19の天井部材16の下面又は下方に、RFIDアンテナを追加して配置することも望ましい(図示省略)。   FIG. 19 shows another embodiment of the IC tag reading device of the present invention. The difference from the device of FIGS. 1, 2 and 4 is that RFID antennas 8 are arranged on both sides of the passage portion 13, respectively. In addition, the radio wave absorption side wall 1 is disposed on the opposite side of each RFID antenna 8 with the passage portion 13 interposed therebetween. The RFID antennas 8A and 8B on the one side and the other side are provided at the same height so that the radio wave radiation surfaces 28 and 28 are parallel and opposed to each other. Each side plate 1 is erected in the vicinity of the back side of each RFID antenna 8 (opposite side when viewed from the passage portion 13). The radio wave absorption side wall 1A provided on one side and the radio wave absorption side wall 1B provided on the other side are 1 to 4 have the same shape as that of the side wall 1 and are erected in parallel to each other. The positional relationship between the RFID antenna 8 and the front wall 2 / rear wall 3 is the same as that described with reference to FIGS. It is also desirable to add an RFID antenna to the lower surface or below the ceiling member 16 in FIG. 19 (not shown).

そして、一側のRFIDアンテナ8Aと他側のRFIDアンテナ8Bは、時間帯をずらして交互に送受信を行う。よって、例えば、大きな被識別体10の一側や他側に偏ってRFIDタグ7が付されていても、どちらかのRFIDアンテナ8がタグ情報を読み取ることができる。また、RFIDタグ7を付した多数の被識別体10…が台車に積まれている場合にも、全てのRFIDタグ7…を漏れなく、どちらかのRFIDアンテナ8が確実に読み取る。   Then, the RFID antenna 8A on one side and the RFID antenna 8B on the other side perform transmission / reception alternately by shifting the time zone. Therefore, for example, even if the RFID tag 7 is attached to one side or the other side of the large identification target 10, either RFID antenna 8 can read the tag information. Further, even when a large number of identification objects 10 attached with RFID tags 7 are stacked on a cart, all RFID tags 7 are not leaked, and one of the RFID antennas 8 reads reliably.

次に、RFIDアンテナ8の電波を実際に測定してその結果について考察する。
先ず、図1,図2の装置にて、設置位置等の条件を様々に変化させてRFIDアンテナ8の周囲の電波環境(電界分布)を測定した結果を図12〜図15に示した。また、前壁2・後壁3を省略して測定した(従来例の)結果を図16に示し、さらに、別の従来の装置の測定結果を図17に示した。23で示した枠内は、RFIDアンテナ8の周囲のうち、後述の図示省略の受信アンテナによって測定した平面視における測定範囲である。測定範囲23に沿って付された数字は、側壁1の前後方向中心の基準点Oから、RFIDアンテナ8側と、前側への位置(座標)である。受信アンテナを測定範囲23内で移動させながら多数の箇所で測定を行う。
Next, the radio wave of the RFID antenna 8 is actually measured and the result is considered.
First, the results of measuring the radio wave environment (electric field distribution) around the RFID antenna 8 by variously changing the conditions such as the installation position in the apparatus of FIGS. 1 and 2 are shown in FIGS. Further, FIG. 16 shows the measurement result (in the conventional example) with the front wall 2 and the rear wall 3 omitted, and FIG. 17 shows the measurement result of another conventional apparatus. A frame indicated by 23 is a measurement range in a plan view measured by a reception antenna (not shown) of the periphery of the RFID antenna 8. The numbers given along the measurement range 23 are positions (coordinates) from the reference point O of the side wall 1 in the front-rear direction center to the RFID antenna 8 side and the front side. Measurement is performed at a number of locations while the receiving antenna is moved within the measurement range 23.

電波吸収前壁2・後壁3は共に、縦寸法が2000mm、横寸法が1000mm、厚さ寸法80mm(そのうち空隙が73mm)である(なお、図1は、前壁2・後壁3の一部のみ図示されている。)。また、RFIDアンテナ8と電波吸収側壁1の距離Xを3000mmとした。また、RFIDアンテナ8の給電点18は、床面から1300mmの高さ位置に設定した。給電点18は、前後中央よりも前寄りに設けられている。
また、RFIDアンテナ8の測定周波数は 953MHzである。測定範囲23に設置する測定用の受信アンテナは垂直偏波のダイポールアンテナであり、測定の高さ位置を1300mmとした。
The radio wave absorption front wall 2 and rear wall 3 both have a vertical dimension of 2000 mm, a horizontal dimension of 1000 mm, and a thickness dimension of 80 mm (of which the gap is 73 mm) (note that FIG. 1 shows one of the front wall 2 and the rear wall 3. Only the part is shown.) The distance X between the RFID antenna 8 and the radio wave absorption side wall 1 is set to 3000 mm. The feeding point 18 of the RFID antenna 8 was set at a height of 1300 mm from the floor surface. The feeding point 18 is provided closer to the front than the front and rear centers.
The measurement frequency of the RFID antenna 8 is 953 MHz. The measurement receiving antenna installed in the measurement range 23 was a vertically polarized dipole antenna, and the measurement height position was set to 1300 mm.

そして、図12、図13、図14は、装置の突出寸法Lを 300mm、 500mm、 750mmに設定した場合の夫々の電界分布を示す。また、図16は、前壁2・後壁3を設けずに測定を行ったときの電界分布を示す。24で示した無地の領域は、電界強度が一定値未満であってRFIDタグ7の情報を読み取れない読取不可領域を示す。そして、網掛けにて示した領域22は、電界強度が一定値以上であってRFIDタグ7の情報を読み取ることのできる読取可能領域を示し、網掛けを密に示した領域ほど強く読み取ることができる。
図16における読取可能領域22が、広範囲であるのに対して、図12〜図14においては、前壁2・後壁3によりゾーンコントロールされて狭くなった読取可能領域22が測定された。また、突出寸法Lが大きくなるに従って、より大きく狭められていくことが分かる。なお、測定範囲23よりも後側における範囲の測定は省略したが、省略した範囲においても読取可能領域はゾーンコントロールされている。
FIG. 12, FIG. 13, and FIG. 14 show the electric field distributions when the protrusion dimension L of the device is set to 300 mm, 500 mm, and 750 mm. FIG. 16 shows an electric field distribution when measurement is performed without providing the front wall 2 and the rear wall 3. A plain area indicated by 24 indicates an unreadable area where the information of the RFID tag 7 cannot be read because the electric field strength is less than a certain value. An area 22 indicated by shading indicates a readable area where the electric field strength is a predetermined value or more and the information of the RFID tag 7 can be read. it can.
The readable area 22 in FIG. 16 is wide, whereas in FIGS. 12 to 14, the readable area 22 narrowed by the zone control by the front wall 2 and the rear wall 3 was measured. Moreover, it turns out that it is narrowed more largely as the protrusion dimension L becomes large. Although the measurement of the range behind the measurement range 23 is omitted, the readable area is also zone-controlled in the omitted range.

図15は、Lを 500mmとし、かつ、前壁2と後壁3の間隔を、図12〜図14の装置に対して約2倍に設定した場合の電界分布を示し、この図15によれば、読取可能領域22が広範囲に拡がり過ぎているため、所望しない場所のタグ情報も読み取ってしまい、適切なゾーンコントロールではない。   FIG. 15 shows the electric field distribution when L is set to 500 mm and the distance between the front wall 2 and the rear wall 3 is set to be approximately twice that of the apparatus shown in FIGS. For example, since the readable area 22 is excessively widened, tag information at an undesired place is read, which is not appropriate zone control.

また、図17は、図1の装置において前壁2・後壁3を設けず、かつ、電波吸収側壁1に替えて電波反射側壁14を設けた場合の電界分布を示す。この図17によれば、RFIDアンテナ8からの直接波と、電波反射側壁14からの反射波とが合成し、読取可能領域22内に、特に弱め合うポイントで複数のNull点17…が生じてしまい、タグが無応答となるという問題がある。
また、図示省略するが、従来では、RFIDアンテナを電波遮蔽材で覆う対策が採られていたが、遮蔽材による反射波の到達経路を予測することが困難であった。
FIG. 17 shows the electric field distribution when the front wall 2 and the rear wall 3 are not provided in the apparatus of FIG. 1 and the radio wave reflection side wall 14 is provided instead of the radio wave absorption side wall 1. According to FIG. 17, the direct wave from the RFID antenna 8 and the reflected wave from the radio wave reflection side wall 14 are combined, and a plurality of null points 17 are generated in the readable area 22 at particularly weakening points. Therefore, there is a problem that the tag becomes unresponsive.
Although not shown in the drawings, conventionally, measures have been taken to cover the RFID antenna with a radio wave shielding material, but it has been difficult to predict the arrival path of the reflected wave by the shielding material.

また、図18は、図12,図13,図14,図16の測定で、RFIDアンテナ8(給電点18)から一定距離の箇所で測定した電界強度の変位を示す。横軸は、給電点18を通るRFIDアンテナ8に立てた法線を基準として計測した前後方向への角度を示し、プラス側が後側への角度、マイナス側が前側への角度を示す。また、縦軸は電界強度を示す。そして、電界強度の最強点から3dB低い電界強度を成す電波の半値角は、図18のグラフからも明らかなように、前壁2・後壁3が設けられない(図16に対応する)場合の半値角θが最も大きく、そして、突出寸法Lが大きくなるに従って(図12,図13,図14の順に)、制御後半値角θcが小さくなる。   FIG. 18 shows the displacement of the electric field intensity measured at a fixed distance from the RFID antenna 8 (feeding point 18) in the measurements of FIGS. 12, 13, 14, and 16. The horizontal axis indicates the angle in the front-rear direction measured with reference to the normal line standing on the RFID antenna 8 passing through the feeding point 18, the plus side indicates the angle toward the rear side, and the minus side indicates the angle toward the front side. The vertical axis indicates the electric field strength. And, as is clear from the graph of FIG. 18, the half-value angle of the radio wave having the electric field strength 3 dB lower than the strongest point of the electric field strength is the case where the front wall 2 and the rear wall 3 are not provided (corresponding to FIG. 16). The half value angle θc of the control is the largest, and as the protrusion dimension L is increased (in the order of FIGS. 12, 13, and 14), the control second half value angle θc is decreased.

本発明において使用するUHF帯のRFIDの電波は、遠方まで伝播するという特性を有しているが、以上の測定結果から、RFIDアンテナ8が放射した電波を効果的にゾーンコントロールできるので、所望しない場所のタグの情報を読み取ることがない。また、別のアンテナからの電波と干渉も防がれ、正確にタグの情報を読み取ることができる。また、Null点が発生することもないので、タグ情報の読取漏れが防がれる。   The radio wave of the RFID in the UHF band used in the present invention has a characteristic of propagating far away. However, from the above measurement results, the radio wave radiated by the RFID antenna 8 can be effectively zone-controlled. It does not read location tag information. In addition, radio waves from other antennas and interference can be prevented, and tag information can be read accurately. Also, since no Null point occurs, reading of tag information is prevented from being missed.

なお、図19の装置においての実験結果は省略したが、一側のアンテナ8Aと他側のアンテナ8Bの内の一方が送受信(ON)の時、他方はOFF状態として、両者を交互にON−OFFさせる。そして、各アンテナ8から放射された電波は、図12〜図14での説明と同様のゾーンコントロールが行われて、図1の装置と同様の効果を得ることができる。   Although the experimental results in the apparatus of FIG. 19 are omitted, when one of the antenna 8A on one side and the antenna 8B on the other side is transmitting / receiving (ON), the other is turned off, and both are turned on alternately. Turn it off. Then, the radio wave radiated from each antenna 8 is subjected to the same zone control as described with reference to FIGS. 12 to 14, and the same effect as that of the apparatus of FIG. 1 can be obtained.

また、従来のように電波反射体を用いた場合には、送信アンテナが例えばパラボラやホーンアンテナなどの指向性の高いアンテナを構成することとなり、アンテナ利得が増加する。本発明によれば、送信アンテナの利得に影響を与えないため、UHF帯で電波の強さとして規制されているEIRP(実効放射電力:アンテナ利得と送信出力の積)値を変化させることなくゾーンコントロールを行うことができる利点がある。   Further, when a radio wave reflector is used as in the prior art, the transmitting antenna constitutes a highly directional antenna such as a parabolic or horn antenna, and the antenna gain increases. According to the present invention, since the gain of the transmitting antenna is not affected, the EIRP (effective radiation power: product of antenna gain and transmission output) value regulated as the radio wave strength in the UHF band is not changed. There is an advantage that can be controlled.

以上のように、本発明に係るICタグ読取装置は、RFIDタグ7を付設した被識別体10が通過する通路部13の一側に、RFIDタグ7に記憶させた情報を読み取るRFIDアンテナ8を配設し、さらに、RFIDアンテナ8から放射される電波の平面視の半値角θを狭める鉛直状電波吸収前壁2・電波吸収後壁3を、RFIDアンテナ8の前縁・後縁近傍から通路部13側へ突出状として設け、かつ、通路部13を挟んで他側に電波吸収側壁1を配設したので、簡易な構成でありながら、放射した電波を制御(ゾーンコントロール)でき、所望しない場所にあるタグ情報の読み取りを防ぐことができる。また、隣接する別のアンテナから放射した電波との干渉も防がれる。さらに、放射領域にNull点が発生することもないので、タグ情報の読取漏れを防ぐことができる。よって、通信領域が大きなFRIDシステムにおける物流において、識別を所望する物品(被識別体10)のみを確実に識別し、管理することができる。また、RFIDアンテナ8は、そのアンテナ利得を増加させずに指向性が高まり技術的に合理的である。   As described above, the IC tag reader according to the present invention has the RFID antenna 8 that reads information stored in the RFID tag 7 on one side of the passage portion 13 through which the identification target 10 provided with the RFID tag 7 passes. Further, the vertical wave absorption front wall 2 and the radio wave absorption rear wall 3 that narrow the half-value angle θ of the radio wave radiated from the RFID antenna 8 in plan view are passed from the vicinity of the front edge and the rear edge of the RFID antenna 8. Since the radio wave absorption side wall 1 is provided on the other side across the passage portion 13 so as to project toward the portion 13 side, the radiated radio wave can be controlled (zone control) while being simple, which is not desired. It is possible to prevent reading tag information in the place. Also, interference with radio waves radiated from another adjacent antenna can be prevented. Further, since no null point is generated in the radiation area, it is possible to prevent reading of tag information from being missed. Therefore, it is possible to reliably identify and manage only the article (identified object 10) that is desired to be identified in the logistics in the FRID system having a large communication area. Further, the RFID antenna 8 is technically rational because the directivity is increased without increasing the antenna gain.

また、本発明に係るICタグ読取装置は、RFIDタグ7を付設した被識別体10が通過する通路部13の両側に夫々、RFIDタグ7に記憶させた情報を読み取るRFIDアンテナ8,8を配設し、さらに、各RFIDアンテナ8から放射される電波の平面視の半値角θを狭める鉛直状電波吸収前壁2・電波吸収後壁3を、RFIDアンテナ8の前縁・後縁近傍から通路部13側へ突出状として設け、かつ、通路部13を挟んで各RFIDアンテナ8の反対側に電波吸収側壁1を配設したので、簡易な構成でありながら、放射した電波を制御(ゾーンコントロール)でき、所望しない場所にあるタグ情報の読み取りを防ぐことができる。また、隣接する別のアンテナから放射した電波との干渉も防がれる。さらに、放射領域にNull点が発生することもないので、タグ情報の読取漏れを防ぐことができる。このように、通信領域が大きなFRIDシステムにおける物流において、識別を所望する物品(被識別体10)のみを確実に識別して、管理できる。
さらに、一側のRFIDアンテナ8Aと他側のRFIDアンテナ8Bを、時間帯をずらして交互に送受信することで、例えば、大きな被識別体10の一側や他側に偏ってRFIDタグ7が付されていても、どちらかのRFIDアンテナ8が確実に読み取ることができる。また、RFIDタグ7を付した多数の被識別体10…が台車に積まれている場合にも、どちらかのRFIDアンテナ8が、全てのRFIDタグ7…を漏れなく確実に読み取ることができる。さらに、RFIDアンテナ8は、そのアンテナ利得を増加させずに指向性が高まり技術的に合理的である。
In addition, the IC tag reader according to the present invention is provided with RFID antennas 8 and 8 for reading information stored in the RFID tag 7 on both sides of the passage portion 13 through which the identification object 10 provided with the RFID tag 7 passes. Further, the vertical radio wave absorption front wall 2 and the radio wave absorption rear wall 3 that narrow the half-value angle θ of the radio wave radiated from each RFID antenna 8 in plan view are routed from the vicinity of the front and rear edges of the RFID antenna 8. Since the radio wave absorption side wall 1 is provided on the opposite side of each RFID antenna 8 with the passage 13 interposed therebetween, the radiated radio wave is controlled (zone control) with a simple configuration. And reading of tag information in an undesired place can be prevented. Also, interference with radio waves radiated from another adjacent antenna can be prevented. Further, since no null point is generated in the radiation area, it is possible to prevent reading of tag information from being missed. In this way, in the physical distribution in the FRID system having a large communication area, it is possible to reliably identify and manage only the article (identified object 10) that is desired to be identified.
Further, by alternately transmitting and receiving the RFID antenna 8A on one side and the RFID antenna 8B on the other side while shifting the time zone, for example, the RFID tag 7 is attached to one side or the other side of the large identification target 10 in a biased manner. Even if it is done, either RFID antenna 8 can read reliably. Further, even when a large number of identification objects 10 attached with RFID tags 7 are stacked on the carriage, any one of the RFID antennas 8 can reliably read all the RFID tags 7 without leakage. Further, the RFID antenna 8 is technically rational because the directivity is increased without increasing the antenna gain.

また、RFIDアンテナ8から放射される電波の半値角θが一対の電波吸収前壁2・後壁3によって狭められた制御後半値角θcを、40°以下(好ましくは20°〜40°)としたので、読取対象外の範囲にあるタグの情報まで読み取ってしまうのを防ぐことができる。また、電波の届く範囲が狭くなり過ぎないので、ゲート(通路部13)を通る際のタグ情報の読取漏れを確実に防ぐことができる。これらのように、物流における被識別体10の管理を確実に行うことができる。しかも、電波吸収側壁1の前後方向寸法を抑えることができるので、設置スペースを多く必要とせず、材料コストも最小限に抑えることができる。   Further, the control half-value angle θc in which the half-value angle θ of the radio wave radiated from the RFID antenna 8 is narrowed by the pair of radio wave absorption front wall 2 and rear wall 3 is 40 ° or less (preferably 20 ° to 40 °). Therefore, it is possible to prevent reading even the information of the tag in the range not to be read. In addition, since the range in which radio waves reach is not too narrow, it is possible to reliably prevent the reading of tag information from being leaked when passing through the gate (passage section 13). As described above, it is possible to reliably manage the identification target 10 in physical distribution. In addition, since the longitudinal dimension of the radio wave absorption side wall 1 can be suppressed, a large installation space is not required, and the material cost can be minimized.

本発明に係るICタグ読取装置の実施の一形態を示す斜視図である。1 is a perspective view showing an embodiment of an IC tag reading device according to the present invention. 平面図である。It is a top view. RFIDアンテナを示す正面図である。It is a front view which shows an RFID antenna. 説明用平面図である。It is a top view for description. 要部正面図である。It is a principal part front view. 他の実施例を示す要部正面図である。It is a principal part front view which shows another Example. 別の実施例を示す要部正面図である。It is a principal part front view which shows another Example. さらに別の実施例を示す要部正面図である。It is a principal part front view which shows another Example. 他の実施例を示す要部平面図である。It is a principal part top view which shows another Example. 別の実施例を示す要部平面図である。It is a principal part top view which shows another Example. さらに別の実施例を示す要部平面図である。It is a principal part top view which shows another Example. 電界分布を示す説明用平面図である。It is an explanatory plan view showing an electric field distribution. 電界分布を示す説明用平面図である。It is an explanatory plan view showing an electric field distribution. 電界分布を示す説明用平面図である。It is an explanatory plan view showing an electric field distribution. 電界分布を示す説明用平面図である。It is an explanatory plan view showing an electric field distribution. 電界分布を示す説明用平面図である。It is an explanatory plan view showing an electric field distribution. 電界分布を示す説明用平面図である。It is an explanatory plan view showing an electric field distribution. 電界強度の測定結果を示すグラフである。It is a graph which shows the measurement result of electric field strength. 本発明に係るICタグ読取装置の他の実施の形態を示す斜視図である。It is a perspective view which shows other embodiment of the IC tag reader which concerns on this invention.

符号の説明Explanation of symbols

1 電波吸収側壁
2 電波吸収前壁
3 電波吸収後壁
7 RFIDタグ
8 RFIDアンテナ
10 被識別体
13 通路部
θ 半値角
θc 制御後半値角
1 Radio Wave Absorption Side Wall 2 Radio Wave Absorption Front Wall 3 Radio Wave Absorption Back Wall 7 RFID Tag 8 RFID Antenna
10 Identification object
13 Passage part θ Half-value angle θc Control second-half value angle

Claims (3)

RFIDタグ(7)を付設した被識別体(10)が通過する通路部(13)の一側に、上記RFIDタグ(7)に記憶させた情報を読み取るRFIDアンテナ(8)を配設し、さらに、該RFIDアンテナ(8)から放射される電波の平面視の半値角(θ)を狭める鉛直状電波吸収前壁(2)・電波吸収後壁(3)を、該RFIDアンテナ(8)の前縁・後縁近傍から上記通路部(13)側へ突出状として設け、かつ、上記通路部(13)を挟んで他側に電波吸収側壁(1)を配設したことを特徴とするICタグ読取装置。   An RFID antenna (8) that reads information stored in the RFID tag (7) is disposed on one side of the passage (13) through which the identification target (10) provided with the RFID tag (7) passes, Further, the vertical radio wave absorption front wall (2) and the radio wave absorption rear wall (3) for narrowing the half-value angle (θ) in plan view of the radio wave radiated from the RFID antenna (8) are connected to the RFID antenna (8). An IC characterized in that it is provided as a protruding shape from the vicinity of the front and rear edges toward the passage portion (13), and a radio wave absorption side wall (1) is disposed on the other side across the passage portion (13). Tag reader. RFIDタグ(7)を付設した被識別体(10)が通過する通路部(13)の両側に夫々、上記RFIDタグ(7)に記憶させた情報を読み取るRFIDアンテナ(8)を配設し、さらに、各該RFIDアンテナ(8)から放射される電波の平面視の半値角(θ)を狭める鉛直状電波吸収前壁(2)・電波吸収後壁(3)を、該RFIDアンテナ(8)の前縁・後縁近傍から上記通路部(13)側へ突出状として設け、かつ、上記通路部(13)を挟んで各該RFIDアンテナ(8)の反対側に電波吸収側壁(1)を配設したことを特徴とするICタグ読取装置。   RFID antennas (8) for reading information stored in the RFID tag (7) are disposed on both sides of the passage (13) through which the identification target (10) provided with the RFID tag (7) passes, Further, the vertical radio wave absorption front wall (2) and the radio wave absorption rear wall (3) for narrowing the half-value angle (θ) of the radio wave radiated from each RFID antenna (8) in plan view are changed to the RFID antenna (8). And a radio wave absorption side wall (1) on the opposite side of each RFID antenna (8) across the passage (13). An IC tag reader characterized by being arranged. 上記RFIDアンテナ(8)から放射される電波の半値角(θ)が一対の上記電波吸収前壁(2)・後壁(3)によって狭められた制御後半値角(θc)を、40°以下とした請求項1又は2記載のICタグ読取装置。   The control second half value angle (θc) in which the half value angle (θ) of the radio wave radiated from the RFID antenna (8) is narrowed by the pair of the front wall (2) and the rear wall (3) is 40 ° or less. The IC tag reader according to claim 1 or 2.
JP2006326708A 2006-12-04 2006-12-04 Ic tag reader Pending JP2008140216A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2006326708A JP2008140216A (en) 2006-12-04 2006-12-04 Ic tag reader
US12/517,185 US20100073141A1 (en) 2006-12-04 2007-12-03 Ic tag reading device
PCT/JP2007/073324 WO2008069175A1 (en) 2006-12-04 2007-12-03 Ic tag reader
DE112007002942T DE112007002942T5 (en) 2006-12-04 2007-12-03 IC tag reader

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011008708A (en) * 2009-06-29 2011-01-13 Mitsubishi Electric Corp Electronic tag reading system and electronic tag reading method
JP2011075360A (en) * 2009-09-30 2011-04-14 Hitachi High-Technologies Corp Specimen treatment system
JP2011208962A (en) * 2010-03-29 2011-10-20 Sysmex Corp Specimen analyzer
KR101389458B1 (en) 2008-08-05 2014-04-28 에스케이 텔레콤주식회사 Radio Frequency Identification Reader For Supporting Dual Band
JP2018055634A (en) * 2016-09-30 2018-04-05 マスプロ電工株式会社 Rfid gate system
WO2019235354A1 (en) * 2018-06-08 2019-12-12 コニカミノルタ株式会社 Rfid system
JP2020021380A (en) * 2018-08-02 2020-02-06 パナソニックIpマネジメント株式会社 Information acquisition system, shopping support system, and information acquisition method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002373315A (en) * 2001-06-14 2002-12-26 Sato Corp Printer
JP2004238195A (en) * 2003-02-10 2004-08-26 Minerva:Kk Antenna device for ic tag
JP2006295414A (en) * 2005-04-07 2006-10-26 Omron Corp Information processing apparatus, management system, control method of information processing apparatus, control program for information processing apparatus, and recording medium with recording control program for information processing apparatus recorded thereon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002373315A (en) * 2001-06-14 2002-12-26 Sato Corp Printer
JP2004238195A (en) * 2003-02-10 2004-08-26 Minerva:Kk Antenna device for ic tag
JP2006295414A (en) * 2005-04-07 2006-10-26 Omron Corp Information processing apparatus, management system, control method of information processing apparatus, control program for information processing apparatus, and recording medium with recording control program for information processing apparatus recorded thereon

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101389458B1 (en) 2008-08-05 2014-04-28 에스케이 텔레콤주식회사 Radio Frequency Identification Reader For Supporting Dual Band
JP2011008708A (en) * 2009-06-29 2011-01-13 Mitsubishi Electric Corp Electronic tag reading system and electronic tag reading method
JP2011075360A (en) * 2009-09-30 2011-04-14 Hitachi High-Technologies Corp Specimen treatment system
JP2011208962A (en) * 2010-03-29 2011-10-20 Sysmex Corp Specimen analyzer
US8926901B2 (en) 2010-03-29 2015-01-06 Sysmex Corporation Sample analyzer
JP2018055634A (en) * 2016-09-30 2018-04-05 マスプロ電工株式会社 Rfid gate system
WO2019235354A1 (en) * 2018-06-08 2019-12-12 コニカミノルタ株式会社 Rfid system
JP2020021380A (en) * 2018-08-02 2020-02-06 パナソニックIpマネジメント株式会社 Information acquisition system, shopping support system, and information acquisition method

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