JP2010049292A - Card reader device - Google Patents

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JP2010049292A
JP2010049292A JP2008210225A JP2008210225A JP2010049292A JP 2010049292 A JP2010049292 A JP 2010049292A JP 2008210225 A JP2008210225 A JP 2008210225A JP 2008210225 A JP2008210225 A JP 2008210225A JP 2010049292 A JP2010049292 A JP 2010049292A
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antenna
current
card
reader device
card reader
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Naohiko Mitani
尚彦 見谷
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

<P>PROBLEM TO BE SOLVED: To provide a card reader device capable of reducing power consumption by generating radio waves only when a contactless IC card approaches. <P>SOLUTION: In the card reader device, a magnet 7 is arranged around a coil-like antenna 5 to generate a magnetic field, and induced current due to electromagnetic induction is generated in the antenna 5 when the contactless IC card 6 containing metal approaches the antenna 5 to detect the induced current by a current detection part 3. This device does not supply current to the antenna 5 and prevents the antenna 5 from transmitting radio waves before detecting the induced current and supplies current to the antenna 5 from a current generating part 2 and makes the antenna 5 generate radio waves after detecting the induced current to communicate with the contactless IC card 6. Upon completion of communication, the supply of current through the antenna 5 from the current generating part 2 is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、カードリーダ装置に関し、特に非接触型のカードリーダ装置に関する。   The present invention relates to a card reader device, and more particularly to a non-contact type card reader device.

例えば、特許文献１で説明されているように、非接触カードリーダ装置は電波を用いて、非接触ＩＣ（Ｉｎｔｅｇｒａｔｅｄ Ｃｉｒｃｕｉｔ）カードのような非接触カードと通信する。
非接触カードリーダのアンテナコイルに電流を流すと、アンテナコイルから交流磁界（電波）が発せられ、この磁界の中に非接触型ＩＣカードをかざすと、非接触ＩＣカードのアンテナコイルに交流電圧が発生し、この交流電圧が直流電圧に変換され、非接触ＩＣカードが動作可能になる。
このため、従来は、非接触カードリーダ装置は、非接触カードをかざされたときすぐに通信が開始できるように、常にアンテナに電流が供給され、アンテナから常に電波が発せられている。
特開２００２−３３４３０５号公報 For example, as described in Patent Document 1, a contactless card reader device communicates with a contactless card such as a contactless IC (Integrated Circuit) card using radio waves.
When a current is passed through the antenna coil of the non-contact card reader, an AC magnetic field (radio wave) is generated from the antenna coil. When a non-contact type IC card is held in the magnetic field, an AC voltage is applied to the antenna coil of the non-contact IC card. This AC voltage is converted into a DC voltage, and the non-contact IC card becomes operable.
For this reason, conventionally, in the non-contact card reader device, current is always supplied to the antenna and radio waves are always emitted from the antenna so that communication can be started immediately when the non-contact card is held over.
JP 2002-334305 A

上記のように、従来の非接触カードリーダ装置は常時電波を発信しているので、使用されていないとき、つまり非接触カードが近接していないときでも電流を消費しており、無駄な電力消費が行われているという課題がある。   As mentioned above, the conventional contactless card reader device always emits radio waves, so it consumes current even when it is not being used, that is, when the contactless card is not in proximity, and wasteful power consumption There is a problem that is being done.

この発明は、上記のような課題を解決することを主な目的の一つとしており、非接触カードの接近を検知する機構を設け、非接触カードが接近していない場合にはアンテナへの電流供給を停止し、非接触カードの接近を検知した際にアンテナへの電流供給を開始するカードリーダ装置を実現することを主な目的とする。   One of the main objects of the present invention is to solve the above-described problems. A mechanism for detecting the approach of a contactless card is provided, and when the contactless card is not approaching, the current to the antenna is detected. The main object is to realize a card reader device that stops supply and starts supplying current to an antenna when an approach of a contactless card is detected.

本発明に係るカードリーダ装置は、
コイル形状のアンテナと、
前記アンテナに磁界を発生させる磁石と、
導体が含まれる非接触カードが前記アンテナに接近した際に、前記非接触カードの導体と前記磁石により前記アンテナに発生している磁界とによって生じる電磁誘導により前記アンテナに流れる誘導電流を検知する電流検知部とを有することを特徴とする。 The card reader device according to the present invention is:
A coil-shaped antenna;
A magnet for generating a magnetic field in the antenna;
When a non-contact card including a conductor approaches the antenna, a current for detecting an induced current flowing in the antenna by electromagnetic induction generated by a conductor of the non-contact card and a magnetic field generated in the antenna by the magnet And a detector.

本発明によれば、アンテナに流れる誘導電流を検知することにより非接触カードの接近を検知することができるので、非接触カードが接近していない場合にはアンテナへの電流供給を停止し、非接触カードの接近を検知した際にアンテナへの電流供給を開始することができ、カードリーダ装置の消費電力を低減させることができる。   According to the present invention, since the approach of the contactless card can be detected by detecting the induced current flowing through the antenna, the current supply to the antenna is stopped when the contactless card is not approaching. When the approach of the contact card is detected, the current supply to the antenna can be started, and the power consumption of the card reader device can be reduced.

実施の形態１．
図１は、本実施の形態に係るカードリーダ装置１００の構成例を示すブロック図である。 Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration example of a card reader device 100 according to the present embodiment.

図１において、処理部１は、カードリーダ装置１００の動作を制御する。
具体的には、後述の第１の切替部４ａ及び第２の切替部４ｂの切替を制御し、電流発生部２からアンテナ５への電流供給を制御する。
処理部１は制御部の例である。 In FIG. 1, the processing unit 1 controls the operation of the card reader device 100.
Specifically, switching of a first switching unit 4a and a second switching unit 4b described later is controlled, and current supply from the current generation unit 2 to the antenna 5 is controlled.
The processing unit 1 is an example of a control unit.

電流発生部２は、処理部１の制御に基づき、アンテナ５に電流を供給する。   The current generator 2 supplies current to the antenna 5 based on the control of the processing unit 1.

電流検知部３は、アンテナ５のコイルで発生した電流（誘導電流）を検知する。   The current detection unit 3 detects a current (induced current) generated in the coil of the antenna 5.

第１の切替部４ａ及び第２の切替部４ｂは、電流発生部２／電流検知部３とアンテナ５との接続を切り替える。   The first switching unit 4 a and the second switching unit 4 b switch the connection between the current generation unit 2 / current detection unit 3 and the antenna 5.

アンテナ５は、非接触ＩＣカード６と通信するための電波を発生する。このアンテナは、コイル状になっており、非接触ＩＣカード６の動きにより電流（誘導電流）を発生する。   The antenna 5 generates radio waves for communicating with the non-contact IC card 6. This antenna is coiled and generates a current (inductive current) by the movement of the non-contact IC card 6.

非接触ＩＣカード６は、カードリーダ装置１００と通信を行う。
非接触ＩＣカード６には、導体が含まれている。以下では、導体として、金属物が含まれている例を説明する。
なお、非接触ＩＣカードは、非接触カードの例である。 The non-contact IC card 6 communicates with the card reader device 100.
The non-contact IC card 6 includes a conductor. Hereinafter, an example in which a metal object is included as a conductor will be described.
The non-contact IC card is an example of a non-contact card.

磁石７は、例えば、図１のような位置に配置され、アンテナ５に磁界を発生させる。なお、磁石の配置は、図１の例に限らない。   For example, the magnet 7 is disposed at a position as shown in FIG. 1 and causes the antenna 5 to generate a magnetic field. The arrangement of the magnets is not limited to the example in FIG.

次に、図２を参照して、アンテナ５における電流発生の原理を説明する。
図２は、図１のアンテナ５部分を拡大した図である。 Next, the principle of current generation in the antenna 5 will be described with reference to FIG.
FIG. 2 is an enlarged view of the antenna 5 portion of FIG.

上述したように、アンテナ５のコイルの周囲には磁石７があり、アンテナ５に対して図２に示す方向で磁界を発生する。
そこに金属物を含有する非接触ＩＣカード６を動かす（近づける、遠ざける）と、フレミングの右手の法則により、カードリーダ装置１００のアンテナ５のコイルに図２に図示のように電流が流れる。
つまり、非接触ＩＣカード６の金属物と磁石７によりアンテナ５に発生している磁界とによって生じる電磁誘導によりアンテナ５に誘導電流が流れる。
電流検知部３は、この誘導電流を検知する。 As described above, the magnet 7 exists around the coil of the antenna 5 and generates a magnetic field in the direction shown in FIG.
When the non-contact IC card 6 containing a metal object is moved (approached or moved away), a current flows through the coil of the antenna 5 of the card reader device 100 as shown in FIG.
That is, an induced current flows through the antenna 5 by electromagnetic induction generated by the metal object of the non-contact IC card 6 and the magnetic field generated in the antenna 5 by the magnet 7.
The current detector 3 detects this induced current.

次に、本実施の形態に係るカードリーダ装置１００の動作例を図３により説明する。   Next, an operation example of the card reader device 100 according to the present embodiment will be described with reference to FIG.

最初は処理部１からの制御によって、電流発生部２は停止し、電流検知部３は動作している。
つまり、電流発生部２は、第１の切替部４ａ及び第２の切替部４ｂにより、アンテナ５と接続されておらず、アンテナ５に電流を供給してない。一方、電流検知部３は、第１の切替部４ａ及び第２の切替部４ｂにより、アンテナ５と接続されており、アンテナ５に誘導電流が流れるとこれを検知できる状態になっている。
カード所持者が非接触ＩＣカード６をカードリーダ装置１００のアンテナ５に近づけると、非接触ＩＣカード６内の金属とコイル形状のアンテナ５で電磁誘導が発生し、アンテナ５に誘導電流が流れる。
この誘導電流を電流検知部３が検知する（Ｓ３０１でＹＥＳ）と、電流検知部３から処理部１に誘導電流の検知が通知され、処理部１が第１の切替部４ａ及び第２の切替部４ｂを制御して、電流検知部３とアンテナ５を切り離し、電流検知を停止させ、電流発生部２とアンテナ５を接続し、電流発生部２からアンテナ５に電流を供給させる（Ｓ３０２）。
このようにアンテナ５に電流を流すことで、非接触ＩＣカード６とカードリーダ装置１００が通信することができ、カードリーダ装置１００がカードデータを読み取りカード認証を行う（Ｓ３０３）。
処理部１は、アンテナ５と非接触ＩＣカード６との通信が継続している間は電流発生部２とアンテナ５との接続を維持し、電流発生部２によるアンテナ５への電流供給を継続させる。
アンテナ５と非接触ＩＣカード６との通信が終了したら、処理部１は、第１の切替部４ａ及び第２の切替部４ｂを制御して、電流発生部２とアンテナ５を切り離し、電流供給を停止させ、電流検知部３とアンテナ５を接続し、電流検知部３が誘導電流を検知できる状態にさせる（Ｓ３０４）。 Initially, the current generator 2 is stopped and the current detector 3 is operating under the control of the processing unit 1.
That is, the current generation unit 2 is not connected to the antenna 5 by the first switching unit 4a and the second switching unit 4b, and does not supply current to the antenna 5. On the other hand, the current detection unit 3 is connected to the antenna 5 by the first switching unit 4a and the second switching unit 4b, and can detect this when an induced current flows through the antenna 5.
When the cardholder brings the non-contact IC card 6 close to the antenna 5 of the card reader device 100, electromagnetic induction occurs between the metal in the non-contact IC card 6 and the coil-shaped antenna 5, and an induced current flows through the antenna 5.
When the current detection unit 3 detects this induced current (YES in S301), the current detection unit 3 notifies the processing unit 1 of detection of the induced current, and the processing unit 1 transmits the first switching unit 4a and the second switching unit. The current detection unit 3 and the antenna 5 are disconnected by controlling the unit 4b, the current detection is stopped, the current generation unit 2 and the antenna 5 are connected, and current is supplied from the current generation unit 2 to the antenna 5 (S302).
In this way, by passing a current through the antenna 5, the non-contact IC card 6 and the card reader device 100 can communicate, and the card reader device 100 reads the card data and performs card authentication (S303).
The processing unit 1 maintains the connection between the current generation unit 2 and the antenna 5 while the communication between the antenna 5 and the non-contact IC card 6 is continued, and continues the current supply to the antenna 5 by the current generation unit 2. Let
When the communication between the antenna 5 and the non-contact IC card 6 is completed, the processing unit 1 controls the first switching unit 4a and the second switching unit 4b to disconnect the current generating unit 2 and the antenna 5 to supply current. And the current detection unit 3 and the antenna 5 are connected so that the current detection unit 3 can detect the induced current (S304).

このように、本実施の形態では、これら一連の処理において、カードリーダ装置の中で多く電流を消費する電流発生部の作動時間をカード操作時に限定することで、カードリーダの消費電流を低減することができる。   As described above, in this embodiment, the current consumption of the card reader is reduced by limiting the operation time of the current generating unit that consumes a large amount of current in the card reader device during the card operation in these series of processes. be able to.

以上、本実施の形態では、電波を発信し、非接触ＩＣカードと通信するカードリーダ装置に関し、
（１）非接触カード内の金属とコイル形状のアンテナの電磁誘導によりカードの接近を検出する機能と、
（２）非接触カード内の金属とコイル形状のアンテナの電磁誘導によりカード接近の検出により、電波の発信・停止を行う機能とを有するカードリーダ装置を説明した。
また、これらの機能により、カードが接近していないときは電波を発信せず、電流消費を低減することができることを説明した。 As described above, the present embodiment relates to a card reader device that transmits radio waves and communicates with a non-contact IC card.
(1) a function of detecting the approach of a card by electromagnetic induction of a metal in a non-contact card and a coil-shaped antenna;
(2) A card reader device having a function of transmitting and stopping radio waves by detecting the approach of a card by electromagnetic induction of a metal in a contactless card and a coil-shaped antenna has been described.
In addition, it has been explained that these functions can reduce current consumption without transmitting radio waves when the card is not approaching.

実施の形態２．
図１に示す構成に加えて、非接触ＩＣカード６の接近時にアンテナ５に流れる誘導電流を蓄電する蓄電部を設けてもよい。
アンテナ５に誘導電流が流れるたびに蓄電部に誘導電流を蓄電することにより、例えば、停電時に蓄電部から電力供給を行ってカードリーダ装置を動作させることができる。 Embodiment 2. FIG.
In addition to the configuration shown in FIG. 1, a power storage unit that stores an induced current flowing through the antenna 5 when the non-contact IC card 6 approaches may be provided.
By storing the induced current in the power storage unit every time an induced current flows through the antenna 5, for example, it is possible to operate the card reader device by supplying power from the power storage unit during a power failure.

実施の形態１に係るカードリーダ装置の構成例を示す図。1 is a diagram illustrating a configuration example of a card reader device according to Embodiment 1. FIG. 実施の形態１に係るカードリーダ装置における電磁誘導の発生原理を説明する図。FIG. 3 is a diagram for explaining the principle of generation of electromagnetic induction in the card reader device according to the first embodiment. 実施の形態１に係るカードリーダ装置の動作例を示すフローチャート図。FIG. 3 is a flowchart showing an operation example of the card reader device according to the first embodiment.

符号の説明Explanation of symbols

１ 処理部、２ 電流発生部、３ 電流検知部、４ 切替部、５ アンテナ、６ 非接触ＩＣカード、７ 磁石、１００ カードリーダ装置。   DESCRIPTION OF SYMBOLS 1 Processing part, 2 Current generation part, 3 Current detection part, 4 Switching part, 5 Antenna, 6 Non-contact IC card, 7 Magnet, 100 Card reader apparatus.

Claims (4)

コイル形状のアンテナと、
前記アンテナに磁界を発生させる磁石と、
導体が含まれる非接触カードが前記アンテナに接近した際に、前記非接触カードの導体と前記磁石により前記アンテナに発生している磁界とによって生じる電磁誘導により前記アンテナに流れる誘導電流を検知する電流検知部とを有することを特徴とするカードリーダ装置。 A coil-shaped antenna;
A magnet for generating a magnetic field in the antenna;
When a non-contact card including a conductor approaches the antenna, a current for detecting an induced current flowing in the antenna by electromagnetic induction generated by a conductor of the non-contact card and a magnetic field generated in the antenna by the magnet A card reader device comprising a detection unit. 前記カードリーダ装置は、更に、
前記アンテナに電流を供給する電流発生部と、
前記電流検知部により誘導電流が検知されるまでは前記電流発生部による前記アンテナへの電流供給を停止させておき、前記電流検知部により誘導電流が検知された際に前記電流発生部による前記アンテナへの電流供給を開始させる制御部とを有することを特徴とする請求項１に記載のカードリーダ装置。 The card reader device further includes:
A current generator for supplying current to the antenna;
Until the induced current is detected by the current detector, the current supply to the antenna by the current generator is stopped, and when the induced current is detected by the current detector, the antenna by the current generator The card reader device according to claim 1, further comprising a control unit that starts current supply to the card. 前記アンテナは、
前記非接触カードと通信を行い、
前記制御部は、
前記アンテナと前記非接触カードとの通信が継続している間は前記電流発生部による前記アンテナへの電流供給を継続させ、前記アンテナと前記非接触カードとの通信が終了した際に前記電流発生部による前記アンテナへの電流供給を停止させることを特徴とする請求項２に記載のカードリーダ装置。 The antenna is
Communicate with the contactless card,
The controller is
While the communication between the antenna and the contactless card is continued, the current supply to the antenna is continued by the current generator, and the current generation is performed when the communication between the antenna and the contactless card is finished. The card reader device according to claim 2, wherein the current supply to the antenna by the unit is stopped. 前記カードリーダ装置は、更に、
前記アンテナに流れる誘導電流を蓄電する蓄電部を有することを特徴とする請求項１〜３のいずれかに記載のカードリーダ装置。 The card reader device further includes:
The card reader device according to claim 1, further comprising a power storage unit that stores an induced current flowing through the antenna.
JP2008210225A 2008-08-19 2008-08-19 Card reader device Pending JP2010049292A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012150633A (en) * 2011-01-19 2012-08-09 Nec Corp Short-range communication apparatus
KR101576590B1 (en) 2014-06-05 2015-12-10 패스테크 주식회사 Ultra-Low Power, Miniaturized Wireless Authentication System including a Mobile Terminal and the Card-Type Authentication Device
JP2017216707A (en) * 2017-07-13 2017-12-07 インテル コーポレイション Near-field communication (nfc) and proximity sensor for portable device
US10057848B2 (en) 2016-10-26 2018-08-21 Samsung Electronics Co., Ltd. Methods of operating near field communication devices

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012150633A (en) * 2011-01-19 2012-08-09 Nec Corp Short-range communication apparatus
KR101576590B1 (en) 2014-06-05 2015-12-10 패스테크 주식회사 Ultra-Low Power, Miniaturized Wireless Authentication System including a Mobile Terminal and the Card-Type Authentication Device
US10057848B2 (en) 2016-10-26 2018-08-21 Samsung Electronics Co., Ltd. Methods of operating near field communication devices
JP2017216707A (en) * 2017-07-13 2017-12-07 インテル コーポレイション Near-field communication (nfc) and proximity sensor for portable device

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