JP2005284455A - Rfid system - Google Patents

Rfid system Download PDF

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Publication number
JP2005284455A
JP2005284455A JP2004094376A JP2004094376A JP2005284455A JP 2005284455 A JP2005284455 A JP 2005284455A JP 2004094376 A JP2004094376 A JP 2004094376A JP 2004094376 A JP2004094376 A JP 2004094376A JP 2005284455 A JP2005284455 A JP 2005284455A
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rfid
electromagnetic coupling
writer
rfid reader
plurality
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Riichi Inoue
Kenichi Kitsuta
利一 井上
謙一 橘田
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Fujita Denki Seisakusho:Kk
Keitekku:Kk
有限会社ケイテック
株式会社藤田電機製作所
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Priority to JP2004094376A priority Critical patent/JP2005284455A/en
Publication of JP2005284455A publication Critical patent/JP2005284455A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein it is necessary to prepare several kinds of RFID (radio frequency identification) reader/writers according to different electromagnetic coupling systems in an RFID system for performing data communication between antennas using electromagnetic coupling or electromagnetic induction (hereinafter referred to as the electromagnetic coupling system). <P>SOLUTION: In the RFID reader/writer used in the RFID system for performing data communication between the antennas using electromagnetic coupling or electromagnetic induction, a data transmitting/receiving antenna part case structure is made common to a plurality of different electromagnetic coupling systems. Reading/writing for RFID tags of the plurality of electromagnetic coupling systems can thereby be performed by one RFID reader/writer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電磁結合または電磁誘導(以下電磁結合方式という)を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて使用するRFIDリーダ/ライタのデータ送受信アンテナ部筐体構造を、複数の異なる電磁結合方式に対して共通にし、1台のRFIDリーダ/ライタで異なる電磁結合方式のRFIDタグに対するリード/ライトが可能となることを特徴とするRFIDシステムに関する。 The present invention is a data transmitting and receiving antenna unit chassis structure of the RFID reader / writer for use in an RFID system using electromagnetic coupling or electromagnetic induction (hereinafter referred to as an electromagnetic coupling method) performs data communication between the antennas, a plurality of different electromagnetic in common with respect to coupling method, an RFID system characterized in that it is possible to read / write to the RFID tag of different electromagnetic coupling system on one of the RFID reader / writer.

RFIDシステムが普及するに従い、RFIDシステムにおけるデータ交信方式としての電磁結合方式が多岐にわたるようになり、異なる電磁結合方式のRFIDタグに対するデータ交信のニーズが強くなってきている。 According RFID system becomes widespread, now electromagnetic coupling system as a data communication method in an RFID system diverse, the need for data communication has been growing for the RFID tag of different electromagnetic coupling method.

しかしながら、現在のRFIDシステムにおいて、1台のリーダ/ライタで、異なる電磁結合方式のRFIDタグをリード/ライトできる手段は見当たらない。 However, in the current RFID systems, with a single reader / writer, I do not see means that can read / write the RFID tag of different electromagnetic coupling method.

本発明は、上述のごとき実情に鑑みてなされたものであり、1台のRFIDリーダ/ライタで、異なる電磁結合方式のRFIDタグをアクセスできる機能を有するRFIDリーダ/ライタとRFIDタグからなるRFIDシステムを提供することを目的とするものである。 The present invention has been made in view of such circumstances described above, RFID system comprising a RFID reader / writer and the RFID tag having a single RFID reader / writer, the ability to access the RFID tag of different electromagnetic coupling method it is an object to provide a.

本発明は、電磁結合を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて、1台のRFIDリーダ/ライタで、異なる電磁結合方式の複数のRFIDタグをアクセスできるために、該RFIDリーダ/ライタのアンテナ部筐体構造を共通にすることを最も主要な特長とする。 The present invention, in the RFID system using electromagnetic coupling performs data communication among the antennas, a single RFID reader / writer, in order to access a plurality of RFID tags having different electromagnetic coupling system, the RFID reader / writer the most important feature that the antenna portion housing structure in common.

本発明によれば、電磁結合を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて、該RFIDリーダ/ライタのアンテナ部筐体構造を共通にすることによって、他の機能を損なうことなく、異なる電磁結合方式の複数のRFIDタグを、1台のRFIDリーダ/ライタでアクセスすることが可能となり、また異なる電磁結合方式の任意のRFIDタグを自動認識することも可能となる。 According to the present invention, in the RFID system using electromagnetic coupling performs data communication between the antennas, by a common antenna portion housing structure of the RFID reader / writer, without compromising other functions, different a plurality of RFID tags electromagnetic coupling method, it is possible to access one of the RFID reader / writer, it is possible to automatically recognize or any RFID tag of different electromagnetic coupling method.

異なる電磁結合方式の複数のRFIDタグを、1台のRFIDリーダ/ライタでアクセスするという目的を、電磁結合を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて、該RFIDリーダ/ライタのアンテナ部筐体構造を共通にすることによって、他の機能を損なわずに実現した。 Different multiple RFID tag electromagnetic coupling system, the object of access in a single RFID reader / writer in an RFID system for performing data communication between the antenna using electromagnetic coupling, the antenna portion of the RFID reader / writer by the chassis structure in common, it was realized without impairing other functions.

以下、本発明の実施形態について、図面を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

本発明の一実施例について、図1乃至図4を参照して説明する。 An embodiment of the present invention will be described with reference to FIGS. 図1は、本発明のRFIDシステム機器構成概要図であり、1はRFIDタグであり、2はRFIDリーダ/ライタであり、3は上位コンピュータである。 Figure 1 is a RFID system equipment configuration schematic diagram of the present invention, 1 is the RFID tag, 2 is the RFID reader / writer, 3 is a host computer. 図2は、本発明のRFIDシステムにおけるデータ伝送系の基本ブロック図であり、2はRFIDリーダ/ライタであり、21はRFIDリーダ/ライタのアンテナ部であり、1はRFIDタグであり、11はRFIDタグのアンテナ部である。 Figure 2 is a basic block diagram of a data transmission system in the RFID system of the present invention, 2 is the RFID reader / writer, 21 is an antenna of the RFID reader / writer 1 is an RFID tag, 11 an antenna portion of the RFID tag. 図3乃至図4は、本発明の一実施例に係るRFIDシステムにおけるRFIDリーダ/ライタの制御方法を示す図である。 3 to FIG. 4 is a diagram showing a control method of the RFID reader / writer in the RFID system according to an embodiment of the present invention.

図2に示すように、電磁結合方式を利用してアンテナ間でデータ交信を行なうRFIDシステムは、RFIDリーダ/ライタ用アンテナ部と、データ送信する符号化回路やデータ受信する復号化回路や電力伝送回路およびそれらを制御する回路からなるRFIDリーダ/ライタと、RFIDタグ用アンテナ部と、データ送信する符号化回路やデータ受信する復号化回路や誘起された電源部回路およびそれらを制御する回路とメモリーからなる種々の形状のRFIDタグとからなり、RFIDリーダ/ライタ2に内蔵されたアンテナを一定の距離までかつ一定の角度で、RFIDタグ1に内蔵されたアンテナに接近させることによって、電磁結合方式を利用してアンテナ間でデータ交信を行なうRFIDシステムにおけるデータの送受信が可能 As shown in FIG. 2, an electromagnetic coupling method using an RFID system for performing data communication between the antenna includes an antenna portion for RFID reader / writer, decrypting circuit and power transmission to the encoding circuit and the data receiver to the data transmission a RFID reader / writer comprising a circuit and a circuit for controlling them, circuitry and memory for controlling an antenna unit for an RFID tag, the power supply unit circuit is the decoding circuit and induced to the encoding circuit and the data receiver to the data transmission and their It consists of a variety of shapes RFID tag consisting of, in and constant angle antenna built in RFID reader / writer 2 to a certain distance, by approaching the antenna incorporated in the RFID tag 1, an electromagnetic coupling method It can transmit and receive data in an RFID system for performing data communication between the antennas by utilizing なる。 It made.

RFIDリーダ/ライタ2は、その先端部にアンテナ収納部21を有し、RFIDリーダ/ライタのアンテナ収納部21には、異なる電磁結合方式でのデータ送受信に対応するアンテナが内蔵されている。 RFID reader / writer 2 has an antenna housing portion 21 at its distal end, the antenna housing portion 21 of the RFID reader / writer antenna corresponding to the data transmitted and received at different electromagnetic coupling method is built.

RFIDタグ1は、その任意の個所にアンテナ収納部11を有し、RFIDタグのアンテナ収納部11には、該RFIDリーダ/ライタのアンテナに対応するアンテナが内蔵されている。 RFID tag 1 has an antenna housing portion 11 in any of its positions, the antenna housing portion 11 of the RFID tag, an antenna corresponding to the antenna of the RFID reader / writer is built.

RFIDリーダ/ライタのアンテナ部は、電磁結合用コイルおよびコアからなり、異なる搬送周波数の変復調回路信号を電気的スイッチにより切替えることにより、該RFIDリーダ/ライタのアンテナ部に異なる搬送周波数の信号が供給できるようになっている。 Antenna portion of the RFID reader / writer, an electromagnetic coupling coil and the core, varies by switching the electric switch modem circuit signal carrier frequency, the signal of the carrier frequency that is different to the antenna portion of the RFID reader / writer is supplied It has become possible way.

コアに使用される材料としは、フェライト、アモルファス合金、パーマロイ、電磁鋼などが考えられるが、その形状および寸法は、通信距離や使用環境によって決定されるものであり、本発明を実現するために制約されるものではない。 And to the material used for the core, ferrite, amorphous alloy, Permalloy, although such electrical steel is considered, its shape and dimensions, is to be determined by the communication distance and the use environment, to implement the present invention there is no intention to be bound.

そして、最初に送受信要求のあったRFIDタグの搬送周波数が実際のRFIDタグの搬送周波数と異なる場合は、自動的に他の搬送周波数に切替えることによって、操作者が読取り対象タグの電磁結合方式を意識することなく、RFIDタグを自動認識することが可能となる。 When the first differs from the carrier frequency of the actual RFID tag is the carrier frequency of the RFID tag for which the reception request is automatically by switching to another carrier frequency, an electromagnetic coupling method of the object tag read by the operator consciousness without, it is possible to automatically recognize the RFID tag.

RFIDリーダ/ライタのアンテナ部の構造としては、図3のように、1種類のコアに1種類の巻線仕様で、複数の搬送周波数に対応するために、共振条件の最適化設計が施されている。 The structure of the antenna portion of the RFID reader / writer, as in FIG. 3, with one type of winding specification one core, in order to correspond to a plurality of carrier frequencies, is performed optimally designed for resonance conditions ing. また、図4のように、1種類のコアに複数の巻線仕様で、複数の搬送周波数に対応するために、相互インダクタンスを考慮した共振条件の最適化設計を施すことによっても実現できる。 Further, as shown in FIG. 4, in one type of core to a plurality of windings specification, in order to correspond to a plurality of carrier frequencies it can also be realized by applying optimization design of the resonance condition in consideration of the mutual inductance. さらに、複数のコアと複数の巻線仕様の組合せのアンテナを同じ筐体に実装しても同じ結果を得ることができる。 Furthermore, it can be mounted on the antenna of a combination of a plurality of cores and a plurality of windings specifications in the same housing to obtain the same result.

以上のように、複数の変復調信号を電気的スイッチで切替えることにより、1台のRFIDリーダ/ライタで、異なる電磁結合方式のRFIDタグをアクセスできる機能を有するRFIDリーダ/ライタとRFIDタグからなるRFIDシステムを提供するという課題を解決することができる。 As described above, by switching the plurality of modem signals at electrical switch, with a single RFID reader / writer, RFID consisting RFID reader / writer and the RFID tag having the ability to access the RFID tag of different electromagnetic coupling method it is possible to solve the problem of providing a system.

本発明の活用例としては、設備の保守点検作業時などにおいて、現物管理目的のID番号のみの低価格RFIDタグと利用環境状況などを把握する目的のセンサー付RFIDタグの組み合わせのように、電磁結合方式の異なる複数のRFIDタグを、1台のRFIDリーダライタでアクセスする場合に活用できる。 Examples take advantage of the present invention, such as in the time of maintenance and inspection of equipment, such as a combination of RFID tags with sensors of purpose to grasp such as low-cost RFID tags and use environmental conditions of the ID number only of cash management purposes, electromagnetic a plurality of different RFID tags with coupling method, can be utilized for access from one RFID reader-writer.

本発明のRFIDシステムのシステム機器構成概要図である It is a system device configuration schematic diagram of an RFID system of the present invention 本発明のデータ伝送系の基本ブロック図である It is a basic block diagram of a data transmission system of the present invention 本発明のRFIDリーダ/ライタの制御方法の一実施例を示す図である Is a diagram showing an embodiment of a control method of the RFID reader / writer of the present invention 本発明のRFIDリーダ/ライタの制御方法の一実施例を示す図である Is a diagram showing an embodiment of a control method of the RFID reader / writer of the present invention

符号の説明 DESCRIPTION OF SYMBOLS

1:RFIDタグ11:RFIDタグのアンテナ収納部2:RFIDリーダ/ライタ21:RFIDリーダ/ライタのアンテナ収納部3:上位コンピュータ 1: RFID tags 11: RFID tag antenna housing portion 2: RFID reader / writer 21: antenna accommodating portion of the RFID reader / writer 3: Host computer

Claims (3)

  1. 電磁結合または電磁誘導(以下電磁結合方式という)を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて使用するRFIDリーダ/ライタにおいて、複数の異なる電磁結合方式に対してデータ送受信アンテナ部筐体構造を共通にすることによって、1台のRFIDリーダ/ライタで複数の異なる電磁結合方式のRFIDタグに対するリード/ライトが可能となることを特徴とするRFIDシステム。 In the RFID reader / writer for use in an RFID system using electromagnetic coupling or electromagnetic induction (hereinafter referred to as an electromagnetic coupling method) performs data communication between the antennas, the data transmission and reception antenna unit chassis structure for a plurality of different electromagnetic coupling method the by a common, RFID system characterized by comprising enabling read / write to the RFID tag of a plurality of different electromagnetic coupling method in one of the RFID reader / writer.
  2. 前記電磁結合または電磁誘導(以下電磁結合方式という)を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて使用するRFIDリーダ/ライタにおいて、複数の異なる電磁結合方式に対してデータ送受信アンテナ部筐体構造を共通にすることによって、1台のRFIDリーダ/ライタで複数の異なる電磁結合方式のRFIDタグに対するリード/ライトが可能となることを特徴とするRFIDシステムであって、該RFIDリーダ/ライタが無線通信で上位コンピュータシステムと通信することを特徴とするRFIDシステム。 Wherein the electromagnetic coupling or the RFID reader / writer for use in an RFID system for performing data communication between the electromagnetic induction using a (hereinafter referred electromagnetic coupling method) antennas, the data transmission and reception antenna unit casing for a plurality of different electromagnetic coupling method by the structure in common, an RFID system characterized by comprising enabling read / write to the RFID tag of a plurality of different electromagnetic coupling method in one of the RFID reader / writer, is the RFID reader / writer RFID system characterized by communicating with the host computer system by wireless communication.
  3. 前記電磁結合または電磁誘導(以下電磁結合方式という)を利用してアンテナ間でデータ交信を行なうRFIDシステムにおいて使用するRFIDリーダ/ライタにおいて、複数の異なる電磁結合方式に対してデータ送受信アンテナ部筐体構造を共通にすることによって、1台のRFIDリーダ/ライタで複数の異なる電磁結合方式のRFIDタグに対するリード/ライトが可能となることを特徴とするRFIDシステムであって、該RFIDリーダ/ライタがUSB接続で上位コンピュータシステムと通信することを特徴とするRFIDシステム。 Wherein the electromagnetic coupling or the RFID reader / writer for use in an RFID system for performing data communication between the electromagnetic induction using a (hereinafter referred electromagnetic coupling method) antennas, the data transmission and reception antenna unit casing for a plurality of different electromagnetic coupling method by the structure in common, an RFID system characterized by comprising enabling read / write to the RFID tag of a plurality of different electromagnetic coupling method in one of the RFID reader / writer, is the RFID reader / writer RFID system characterized by communicating with the host computer system via a USB connection.
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