JP2005284455A - Rfid system - Google Patents
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- 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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- 238000010168 coupling process Methods 0.000 claims abstract description 40
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 15
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
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 relates to a data transmission / reception antenna unit housing structure of an RFID reader / writer used in an RFID system that performs data communication between antennas using electromagnetic coupling or electromagnetic induction (hereinafter referred to as electromagnetic coupling method). The present invention relates to an RFID system that is common to a coupling method and can read / write with respect to RFID tags of different electromagnetic coupling methods by one 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。 As the RFID system becomes widespread, the electromagnetic coupling method as a data communication method in the RFID system is diversified, and the need for data communication with respect to RFID tags of different electromagnetic coupling methods is increasing.
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 system, there is no means capable of reading / writing different electromagnetic coupling type RFID tags with one reader / writer.
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 the above circumstances, and an RFID system comprising an RFID reader / writer and a RFID tag having a function capable of accessing RFID tags of different electromagnetic coupling methods with a single RFID reader / writer. Is intended to provide.
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。 In an RFID system that performs data communication between antennas using electromagnetic coupling, a single RFID reader / writer can access a plurality of RFID tags of different electromagnetic coupling systems. The most important feature is to have a common antenna housing structure.
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 an RFID system that performs data communication between antennas using electromagnetic coupling, the antenna unit housing structure of the RFID reader / writer is made common so that other functions are not impaired. A plurality of electromagnetic coupling type RFID tags can be accessed by a single RFID reader / writer, and any RFID tag of a different electromagnetic coupling type can be automatically recognized.
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。 In an RFID system that performs data communication between antennas using electromagnetic coupling for the purpose of accessing a plurality of RFID tags of different electromagnetic coupling methods with one RFID reader / writer, the antenna section of the RFID reader / writer By using a common housing structure, it was realized without compromising 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。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。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。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。 An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram of the configuration of an RFID system device according to the present invention. 1 is an RFID tag, 2 is an RFID reader / writer, and 3 is a host computer. FIG. 2 is a basic block diagram of a data transmission system in the RFID system of the present invention, 2 is an RFID reader / writer, 21 is an antenna section of the RFID reader / writer, 1 is an RFID tag, 11 is It is an antenna part of an RFID tag. 3 to 4 are diagrams illustrating a method of controlling 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となる。 As shown in FIG. 2, an RFID system that performs data communication between antennas using an electromagnetic coupling method includes an RFID reader / writer antenna unit, an encoding circuit that transmits data, a decoding circuit that receives data, and power transmission. An RFID reader / writer comprising a circuit and a circuit for controlling them, an RFID tag antenna, an encoding circuit for transmitting data, a decoding circuit for receiving data, an induced power supply circuit, a circuit for controlling them, and a memory An electromagnetic coupling method by bringing the antenna built in the RFID reader / writer 2 close to the antenna built in the RFID tag 1 up to a certain distance and at a certain angle. Data can be transmitted and received in an RFID system that performs data communication between antennas 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。 The RFID reader / writer 2 has an antenna housing portion 21 at its tip, and the antenna housing portion 21 of the RFID reader / writer incorporates an antenna corresponding to data transmission / reception using different electromagnetic coupling methods.
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。 The RFID tag 1 has an antenna housing portion 11 at an arbitrary position, and an antenna corresponding to the antenna of the RFID reader / writer is built in the antenna housing portion 11 of the RFID tag.
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。 The antenna unit of the RFID reader / writer is composed of an electromagnetic coupling coil and a core, and signals of different carrier frequencies are supplied to the antenna unit of the RFID reader / writer by switching modulation / demodulation circuit signals of different carrier frequencies with an electrical switch. It can be done.
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。 The material used for the core may be ferrite, amorphous alloy, permalloy, electromagnetic steel, etc., but its shape and dimensions are determined by the communication distance and usage environment, and in order to realize the present invention It is not restricted.
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。 If the carrier frequency of the RFID tag that was initially requested for transmission / reception differs from the carrier frequency of the actual RFID tag, the operator automatically switches to another carrier frequency so that the operator can change the electromagnetic coupling method of the tag to be read. The RFID tag can be automatically recognized without being conscious.
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。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。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。 As shown in FIG. 3, the RFID reader / writer antenna section is designed to optimize resonance conditions in order to support a plurality of carrier frequencies with one type of winding specification for one type of core. ing. Further, as shown in FIG. 4, it can be realized by performing an optimization design of resonance conditions in consideration of mutual inductance in order to correspond to a plurality of carrier frequencies with a plurality of winding specifications on one kind of core. Furthermore, the same result can be obtained even if an antenna having a combination of a plurality of cores and a plurality of winding specifications is mounted in the same housing.
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, an RFID reader / writer and a RFID tag having a function capable of accessing RFID tags of different electromagnetic coupling types with one RFID reader / writer by switching a plurality of modulation / demodulation signals with an electrical switch. The problem of providing a system can be solved.
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。 As an example of use of the present invention, a combination of a low-priced RFID tag having only an ID number for physical management purposes and a sensor-equipped RFID tag for grasping the use environment status, etc. at the time of equipment maintenance inspection work, etc. This can be utilized when a plurality of RFID tags having different coupling methods are accessed by a single RFID reader / writer.
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 tag 11: RFID tag antenna housing 2: RFID reader / writer 21: RFID reader / writer antenna housing 3: host computer
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004094376A JP2005284455A (en) | 2004-03-29 | 2004-03-29 | Rfid system |
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| JP2004094376A JP2005284455A (en) | 2004-03-29 | 2004-03-29 | Rfid system |
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| JP2005284455A true JP2005284455A (en) | 2005-10-13 |
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| JP2004094376A Pending JP2005284455A (en) | 2004-03-29 | 2004-03-29 | Rfid system |
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