JP2003233780A - Data communication device - Google Patents

Data communication device

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Publication number
JP2003233780A
JP2003233780A JP2002029802A JP2002029802A JP2003233780A JP 2003233780 A JP2003233780 A JP 2003233780A JP 2002029802 A JP2002029802 A JP 2002029802A JP 2002029802 A JP2002029802 A JP 2002029802A JP 2003233780 A JP2003233780 A JP 2003233780A
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Japan
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writer
reader
data communication
communication apparatus
ic card
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Abandoned
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JP2002029802A
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Japanese (ja)
Inventor
Yoji Isoda
Ikuo Takahashi
Naohisa Takayama
陽次 礒田
直久 高山
郁夫 高橋
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Mitsubishi Electric Corp
三菱電機株式会社
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Priority to JP2002029802A priority Critical patent/JP2003233780A/en
Publication of JP2003233780A publication Critical patent/JP2003233780A/en
Application status is Abandoned legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To resolve a problem in attachment of a reader-writer 2 wherein modulation factors A of a non-contact IC card 1 are different in attaching the reader-writer 2 to a wooden wall 3 and in attaching the reader-writer 2 to a ferrite wall 4, and a transmission success rate of data is deteriorated unless electrical characteristics of the reader-writer 2 and the non-contact IC card 1 are adjusted each time in accordance with an attaching member of the reader- writer 2. <P>SOLUTION: When attaching the reader-writer 32 to an external object such as a wall, an iron plate shielding a magnetic field generated by the reader-writer 32 is inserted between the reader-writer 41 and the external object. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】この発明は、入退出や改札用にリーダライタを壁や机などに取付けて、非接触の状態を保持しながら、非接触ICカードとリーダライタがデータの送受信を実施するデータ通信装置に関するものである。 BACKGROUND OF THE INVENTION BACKGROUND OF THE INVENTION [0001] This invention is attached to the reader writer to a wall or desk for entry and exit and the ticket gate, while maintaining a non-contact state, the non-contact IC card and the reader-writer is related data communication apparatus that performs data transmission and reception. 【0002】 【従来の技術】図20は例えば「ワイヤレスカードガイドブック99」(ワイヤレスカード実用化推進協議会編、1999年3月出版)の第104頁、第154頁に示された従来のデータ通信装置を示す斜視図であり、図21は従来のデータ通信装置の電気的な特性を示す説明図である。 [0002] FIG. 20 is, for example, "wireless card guide book 99" (wireless card practical Promotion Council, ed., March 1999 publication) the first 104 pages of the conventional data shown in the first 154 pages is a perspective view showing a communication device, FIG. 21 is an explanatory diagram showing the electrical characteristics of a conventional data communication apparatus. 図において、1はデータの送受信機能を有する非接触ICカード、2は非接触の状態を保持しながら電力を非接触ICカード1に供給するとともに、非接触ICカード1とデータの送受信を実施するリーダライタ、3はリーダライタ2が取り付けられる木製の壁、1 In the figure, the contactless IC card 1 having the function of transmitting and receiving data, 2 supplies to the non-contact IC card 1 power while maintaining a non-contact state, to implement transmission and reception of the non-contact IC card 1 and the data writer, 3 wooden walls writer 2 is mounted, 1
1はリーダライタ2のコイル、12はコイル11により作られる磁力線、13は非接触ICカード1が受ける磁界である。 1 writer second coil, 12 is lines of magnetic force produced by the coil 11, 13 is a magnetic field non-contact IC card 1 receives. 【0003】図22は非接触ICカード1のデータ受信部を示す構成図であり、図において、21はリーダライタ2の送信信号を受信するカードコイル、22は整流回路、23は整流回路22の出力電圧、24はレギュレータ、25は整流回路22の出力電圧23が基準電位V [0003] Figure 22 is a block diagram illustrating a data receiving portion of the non-contact IC card 1, reference numeral 21 is the card coil for receiving a transmission signal of the reader-writer 2, 22 rectifier circuit, 23 is a rectifier circuit 22 output voltage, 24 regulator 25 is the reference output voltage 23 of the rectifier circuit 22 is the potential V
c1以上のとき、その出力電圧23と基準電位V c2を比較するコンパレータ、26はコンパレータ25の比較結果に応じて受信信号を復調する復調回路である。 When the above c1, a comparator for comparing the output voltage 23 and a reference potential V c2, 26 is a demodulator for demodulating the received signal according to the comparison result of the comparator 25. 【0004】次に動作について説明する。 [0004] Next, the operation will be described. まず、リーダライタ2がデジタルの2値信号のうち、Hレベルの信号(以下、H信号という)を送信する場合、振幅値I の電流をコイル11に流すようにする。 First, the reader writer 2 of the digital binary signal, H-level signal (hereinafter, referred to as H signals) When sending, to flow a current amplitude value I 1 to a coil 11. これにより、図2 As a result, as shown in FIG. 2
1に示すような磁力線12がコイル11の周りに作られるため、非接触ICカード1が振幅値H の磁界13を受けることになる(図23(a)を参照)。 Since the field lines 12 as shown in 1 is made around the coil 11, the non-contact IC card 1 will be subject to magnetic field 13 of amplitude H 1 (see Figure 23 (a)). 【0005】一方、リーダライタ2がデジタルの2値信号のうち、Lレベルの信号(以下、L信号という)を送信する場合、振幅値I の電流をコイル11に流すようにする。 On the other hand, among the reader writer 2 of the digital binary signal, L-level signal (hereinafter, referred to as L signals) When sending, to flow a current amplitude value I 2 to the coil 11. ただし、I >I である。 However, it is I 1> I 2. これにより、図2 As a result, as shown in FIG. 2
1に示すような磁力線12がコイル11の周りに作られるため、非接触ICカード1が振幅値H の磁界13を受けることになる(図23(a)を参照)。 Since the field lines 12 as shown in 1 is made around the coil 11, the non-contact IC card 1 will be subject to magnetic field 13 of amplitude H 2 (see Figure 23 (a)). ただし、H However, H
>H である。 1> is H 2. 【0006】したがって、非接触ICカード1のカードコイル21が受信する信号波形は図23(a)のようになり、H信号送信時においては、整流回路22の出力電圧23がV となる。 Accordingly, the signal waveform card coil 21 of the non-contact IC card 1 receives is as shown in FIG. 23 (a), the at the time of H signal transmission, the output voltage 23 of the rectifier circuit 22 becomes V 1. 一方、L信号送信時においては、 On the other hand, at the time L signal transmission,
整流回路22の出力電圧23がV となる(図23 Output voltage 23 of the rectifier circuit 22 becomes V 2 (FIG. 23
(b)を参照)。 (B) see). ただし、V >V である。 However, a V 1> V 2. 【0007】ここで、リーダライタ2がデータをASK [0007] In this case, the reader writer 2 is a data ASK
(Amplitude ShiftKeying)変調して送信する場合、非接触ICカード1は、変調度Aで信号を受信することになるが、変調度Aには目標値(例えば、10%)が定められており、変調度Aが下限値(例えば、8%)又は上限値(例えば、12%)を逸脱すると、非接触ICカード1のコンパレータ25におけるH/Lの判別が不可能になる。 (Amplitude Shift Keying) when the modulated and transmitted, the non-contact IC card 1 is made to receive a signal at the modulation degree A, and the target value (e.g., 10%) is defined in the modulation factor A, modulation a lower limit (e.g., 8%) or upper limit (e.g., 12%) as a departure and becomes impossible to discriminate H / L in the comparator 25 of the non-contact IC card 1. A=(H −H )/(H +H )×100% =(V −V )/(V +V )×100% よって、例えば、V =3Vのとき、A≦12%を満たす基準電位V c1が2.36Vとなり、A≧8%を満たす基準電位V c2が2.55Vとなるので、L信号送信時における出力電圧V が、2.36V≦V ≦2.5 A = (H 1 -H 2) / (H 1 + H 2) × 100% = (V 1 -V 2) / (V 1 + V 2) × 100% Thus, for example, when V 1 = 3V, A ≦ reference potential V c1 is 2.36V becomes to satisfy 12%, since the reference potential V c2 satisfying a ≧ 8% is 2.55V, the output voltage V 2 at L signal transmission, 2.36V ≦ V 2 ≦ 2.5
5Vとなるように、リーダライタ2及び非接触ICカード1の電気的な特性が予め調整されている必要がある。 So that 5V, it is necessary electrical characteristics of the reader writer 2 and noncontact IC card 1 is pre-adjusted. 【0008】非接触ICカード1のコンパレータ25 [0008] of the non-contact IC card 1 comparator 25
は、整流回路22の出力電圧23が基準電位V c1以上のとき、その出力電圧23と基準電位V c2を比較する。 The output voltage 23 of the rectifier circuit 22 when the above reference potential V c1, and compares the output voltage 23 and the reference potential V c2. そして、非接触ICカード1の復調回路26は、コンパレータ25の比較結果に応じて受信信号を復調する。 Then, the demodulation circuit 26 of the noncontact IC card 1 demodulates the received signal according to the comparison result of the comparator 25. 即ち、整流回路22の出力電圧23がV であれば、V >V c2となるのでH信号を復調し、整流回路22の出力電圧23がV That is, when the output voltage 23 of the rectifier circuit 22 is a V 1, the H signal is demodulated because the V 1> V c2, the output voltage 23 of the rectifier circuit 22 is V であれば、V <V c2となるのでL信号を復調する。 If 2, demodulates the L signal since the V 2 <V c2. 【0009】上記従来例では、リーダライタ2を木製の壁3に取り付けるものについて示したが、木製の壁3用に調整されたリーダライタ2を比透磁率が大きい壁(例えば、フェライト製の壁4)に取り付けると(図24及び図25を参照)、図26に示すように、リーダライタ2が振幅値I ,I の電流をコイル11に流しても、 [0009] The above conventional example, has been described as attaching the reader writer 2 to a wooden wall 3, wall writer 2 tuned for wooden wall 3 relative permeability is large (e.g., ferrite wall When attached to the 4) (see FIGS. 24 and 25), as shown in FIG. 26, also the reader writer 2 by applying a current amplitude value I 1, I 2 to the coil 11,
非接触ICカード1が受ける磁界13の振幅値がH Amplitude value H 1 of the non-contact IC card 1 receives magnetic field 13,
にならず、H ' ,H 'となる。 Not in H 2, the H 1 ', H 2'. したがって、非接触ICカード1の整流回路22の出力電圧23もV ,V にならず、V ' ,V 'となる。 Therefore, the output voltage 23 of the non-contact IC card 1 of the rectifier circuit 22 is also not in V 1, V 2, the V 1 ', V 2'. この結果、図26(b)に示すように、整流回路22の出力電圧V が基準電位V c2より大きくなる場合には、非接触ICカード1のコンパレータ25におけるH/Lの判別が不可能になる。 As a result, as shown in FIG. 26 (b), when the output voltage V 2 of the rectifier circuit 22 is greater than the reference potential V c2 is impossible to determine the H / L in the comparator 25 of the non-contact IC card 1 become. 【0010】 【発明が解決しようとする課題】従来のデータ通信装置は以上のように構成されているので、リーダライタ2を木製の壁3に取り付ける場合と、リーダライタ2をフェライト製の壁4に取り付ける場合とでは、非接触ICカード1の変調度Aが異なる。 [0010] Since the conventional data communication apparatus THE INVENTION An object you try solving] is constructed as described above, and when mounting the reader writer 2 to a wooden wall 3, the reader-writer 2 made ferrite wall 4 in the case of mounting, the modulation factor a of the non-contact IC card 1 is different. したがって、リーダライタ2の取付部材に合わせて、その都度、リーダライタ2や非接触ICカード1の電気的な特性を調整しなければ、 Thus, in accordance with the mounting member of the reader writer 2, each time to be adjusted electrical characteristics of the reader writer 2 and noncontact IC card 1,
データの送信成功率が劣化してしまう課題があった。 Transmission success rate of the data there is a problem that deteriorates. 【0011】この発明は上記のような課題を解決するためになされたもので、リーダライタの取付部材が変化しても、データの送信成功率を維持することができるデータ通信装置を得ることを目的とする。 [0011] The present invention has been made to solve the above problems, even if the mounting member interrogator is changed, to obtain a data communication apparatus capable of maintaining a successful transmission of data for the purpose. 【0012】 【課題を解決するための手段】この発明に係るデータ通信装置は、リーダライタを外部物体に取り付ける際、リーダライタが発生する磁界を遮蔽する遮蔽部材をリーダライタと外部物体の間に挿入するようにしたものである。 [0012] [Means for Solving the Problems The data communication apparatus according to the present invention, when mounting the reader writer to an external object, a shielding member for shielding a magnetic field reader writer is generated between the writer and the external object it is obtained so as to insert. 【0013】この発明に係るデータ通信装置は、導体を用いて遮蔽部材を構成するようにしたものである。 The data communication apparatus according to the invention which is adapted to constitute a shielding member with a conductor. 【0014】この発明に係るデータ通信装置は、鉄板を用いて遮蔽部材を構成するようにしたものである。 The data communication apparatus according to the invention which is adapted to constitute a shielding member with an iron plate. 【0015】この発明に係るデータ通信装置は、形状が立体的な遮蔽部材を用いるようにしたものである。 The data communication apparatus according to the present invention, the shape is to use a three-dimensional shielding member. 【0016】この発明に係るデータ通信装置は、蓋のない箱型形状の遮蔽部材を用いるようにしたものである。 The data communication apparatus according to the invention, in which to use a shielding member of box-shaped uncovered. 【0017】この発明に係るデータ通信装置は、網目構造の遮蔽部材を用いるようにしたものである。 The data communication apparatus according to the invention has to use a shielding member of a network structure. 【0018】 【発明の実施の形態】以下、この発明の実施の一形態を説明する。 DETAILED DESCRIPTION OF THE INVENTION Hereinafter, an embodiment of the present invention. 実施の形態1. The first embodiment. 図1はこの発明の実施の形態1によるデータ通信装置を示す構成図であり、図2はこの発明の実施の形態1によるデータ通信装置の電気的な特性を示す説明図である。 Figure 1 is a block diagram illustrating a data communication apparatus according to Embodiment 1 of the present invention, FIG. 2 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 1 of the present invention. 図において、31はデータの送受信機能を有する非接触ICカード、32は非接触の状態を保持しながら電力を非接触ICカード31に供給するとともに、非接触ICカード31とデータの送受信を実施するリーダライタ、33はリーダライタ32と鉄板35が所定の距離だけ離れるように、リーダライタ32を固定する固定材であり、例えば、磁界に対する損失の小さい発泡材で構成されている。 In the figure, 31 non-contact IC card having functions of transmitting and receiving data, 32 supplies the non-contact IC card 31 of power while maintaining a non-contact state, to implement transmission and reception of the contactless IC card 31 and data writer, 33, as the reader writer 32 and the iron plate 35 are separated by a predetermined distance, a fixed member for fixing the writer 32, for example, is composed of a small foam loss with respect to the magnetic field. 【0019】34はリーダライタ32が取り付けられる木製の壁(外部物体)、35はリーダライタ32と壁3 [0019] 34 of the wooden writer 32 is mounted walls (external object), 35 the reader writer 32 and the wall 3
4の間に挿入され、リーダライタ32が発生する磁界を遮蔽する鉄板(遮蔽部材)である。 Is inserted between 4 is a steel plate to shield a magnetic field reader writer 32 is generated (shield member). ここでは、鉄板35 Here, the iron plate 35
を用いて遮蔽部材を構成しているが、遮蔽部材は導体であればよく、鉄以外の金属板等を用いてもよい。 Although constitute a shielding member by using a shielding member may be a conductor, it may be used other than iron metal plate. 41はリーダライタ32のコイル、42はコイル41により作られる磁力線、43は非接触ICカード31が受ける磁界である。 41 coil of the reader-writer 32, 42 lines of magnetic force produced by the coil 41, 43 is a magnetic field non-contact IC card 31 receives. 【0020】図3は非接触ICカード31のデータ受信部を示す構成図であり、図において、51はリーダライタ32の送信信号を受信するカードコイル、52は整流回路、53は整流回路52の出力電圧、54はレギュレータ、55は整流回路52の出力電圧53が基準電位V [0020] FIG. 3 is a block diagram illustrating a data receiving portion of the non-contact IC card 31, in the figure, the card coil for receiving a transmission signal of the reader writer 32 51, 52 rectifier circuit, 53 is a rectifier circuit 52 output voltage, 54 regulator 55 output voltage 53 is the reference potential V of the rectifier circuit 52
c1以上のとき、その出力電圧53と基準電位V c2を比較するコンパレータ、56はコンパレータ55の比較結果に応じて受信信号を復調する復調回路である。 When the above c1, a comparator for comparing the output voltage 53 and a reference potential V c2, 56 is a demodulator for demodulating the received signal according to the comparison result of the comparator 55. 図5 Figure 5
はこの発明の実施の形態1によるデータ通信装置の処理内容を示すフローチャートである。 Is a flow chart showing the processing contents of the data communication apparatus according to Embodiment 1 of the present invention. 【0021】次に動作について説明する。 [0021] Next, the operation will be described. まず、リーダライタ32がデジタルの2値信号のうち、Hレベルの信号(以下、H信号という)を送信する場合、振幅値I First, of the reader writer 32 is the digital binary signal, when transmitting H-level signal (hereinafter, referred to as H signal), amplitude value I 1
の電流をコイル41に流すようにする(ステップST The current to flow in the coil 41 (Step ST
1)。 1). これにより、図2に示すような磁力線42がコイル41の周りに作られるため、図4(a)に示すように、非接触ICカード31が振幅値H の磁界43を受けることになる(ステップST2)。 Accordingly, since the magnetic field lines 42 as shown in FIG. 2 is made around the coil 41, as shown in FIG. 4 (a), the non-contact IC card 31 is to receive the magnetic field 43 of amplitude H 1 ( step ST2). ただし、磁力線4 However, the magnetic field lines 4
2の線形は、固定材33が磁力線42に影響を及ぼさないので、固定材33の有無に関係なく同一の形をとる。 2 of linear, fixed member 33 is so not affect the magnetic field lines 42 take the same shape regardless of the fixed member 33.
また、磁力線42は鉄板35の表面上では鉄板35と平行になる。 Further, magnetic field lines 42 is parallel to the iron plate 35 is on the surface of the iron plate 35. 【0022】一方、リーダライタ32がデジタルの2値信号のうち、Lレベルの信号(以下、L信号という)を送信する場合、振幅値I の電流をコイル41に流すようにする(ステップST3)。 On the other hand, among the reader writer 32 is the digital binary signal, L-level signal (hereinafter, referred to as L signals) When sending, to flow a current amplitude value I 2 to the coil 41 (step ST3 ). ただし、I >I である。 However, it is I 1> I 2. これにより、図2に示すような磁力線42がコイル41の周りに作られるため、図4(a)に示すように、 Accordingly, since the magnetic field lines 42 as shown in FIG. 2 is made around the coil 41, as shown in FIG. 4 (a),
非接触ICカード31が振幅値H の磁界を受けることになる(ステップST4)。 Contactless IC card 31 will be subjected to the magnetic field of amplitude H 2 (step ST4). ただし、H >H である。 However, it is H 1> H 2. この場合も、磁力線42の線形は、固定材33が磁力線42に影響を及ぼさないので、固定材33の有無に関係なく同一の形をとる。 Again, linear magnetic field lines 42 since the fixed member 33 does not affect the magnetic field lines 42 take the same shape regardless of the fixed member 33. また、磁力線42は鉄板35 In addition, the magnetic field lines 42 iron plate 35
の表面上では鉄板35と平行になる。 Is parallel to the iron plate 35 is on the surface of the. 【0023】したがって、非接触ICカード31のカードコイル51が受信する信号波形は図4(a)のようになり、H信号送信時においては、整流回路52の出力電圧53がV となる。 [0023] Therefore, the signal waveform card coil 51 of the non-contact IC card 31 receives is as shown in FIG. 4 (a), in the time of the H signal transmission, the output voltage 53 of the rectifying circuit 52 becomes V 1. 一方、L信号送信時においては、 On the other hand, at the time L signal transmission,
整流回路52の出力電圧53がV となる(図4(b) Output voltage 53 of the rectifying circuit 52 becomes V 2 (FIG. 4 (b)
を参照)。 See). ただし、V >V である。 However, a V 1> V 2. 【0024】ここで、リーダライタ32がデータをAS [0024] In this case, the reader writer 32 is a data AS
K(Amplitude Shift Keying) K (Amplitude Shift Keying)
変調して送信する場合、非接触ICカード31は、変調度Aで信号を受信することになるが(ステップST When transmitting modulated and the non-contact IC card 31 is comprised to receive signals modulation A (Step ST
5)、変調度Aには目標値(例えば、10%)が定められており、変調度Aが下限値(例えば、8%)又は上限値(例えば、12%)を逸脱すると、非接触ICカード31のコンパレータ55におけるH/Lの判別が不可能になる。 5), the target value is the modulation index A (e.g., 10%) has been determined, the degree of modulation A lower limit (e.g., 8%) or upper limit (e.g., as a departure 12%), non-contact IC It becomes impossible to discriminate H / L in the comparator 55 of the card 31. A=(H −H )/(H +H )×100% =(V −V )/(V +V )×100% よって、例えば、V =3Vのとき、A≦12%を満たす基準電位V c1が2.36Vとなり、A≧8%を満たす基準電位V c2が2.55Vとなるので、L信号送信時における出力電圧V が、2.36V≦V ≦2.5 A = (H 1 -H 2) / (H 1 + H 2) × 100% = (V 1 -V 2) / (V 1 + V 2) × 100% Thus, for example, when V 1 = 3V, A ≦ reference potential V c1 is 2.36V becomes to satisfy 12%, since the reference potential V c2 satisfying a ≧ 8% is 2.55V, the output voltage V 2 at L signal transmission, 2.36V ≦ V 2 ≦ 2.5
5Vとなるように、リーダライタ32及び非接触ICカード31の電気的な特性が予め調整されている必要がある(ステップST6〜ST8)。 So that 5V, it is necessary electrical characteristics of the reader writer 32 and the non-contact IC card 31 is previously adjusted (step ST6~ST8). 【0025】非接触ICカード31のコンパレータ55 [0025] The comparator 55 of the non-contact IC card 31
は、整流回路52の出力電圧53が基準電位V c1以上のとき、その出力電圧53と基準電位V c2を比較する(ステップST9)。 The output voltage 53 of the rectifier circuit 52 when the above reference potential V c1, and compares the output voltage 53 and a reference potential V c2 (step ST9). そして、非接触ICカード31の復調回路56は、コンパレータ55の比較結果に応じて受信信号を復調する。 Then, the demodulation circuit 56 of the non-contact IC card 31 demodulates the received signal according to the comparison result of the comparator 55. 即ち、整流回路52の出力電圧5 That is, the output voltage 5 of the rectifier circuit 52
3がV であれば、V >V c2となるのでH信号を復調し、整流回路52の出力電圧53がV であれば、V If 3 is a V 1, demodulates the H signal since the V 1> V c2, the output voltage 53 of the rectifier circuit 52 if V 2, V
<V c2となるのでL信号を復調する(ステップST Since the 2 <V c2 demodulates the L signal (step ST
10)。 10). 【0026】この実施の形態では、リーダライタ32を木製の壁34に取り付けるものについて示したが、木製の壁34用に調整されたリーダライタ32を比透磁率が大きい壁(例えば、フェライト製の壁36)に取り付けても(図6及び図7を参照)、非接触ICカード31が受ける磁界31の振幅値に変化が生じない。 [0026] In this embodiment, as mentioned above. Attaching the reader writer 32 in the wall 34 of the wood, the reader writer 32 that is tuned for wooden wall 34 relative permeability greater wall (e.g., made of ferrite wall 36) be attached to (see FIGS. 6 and 7), the change in amplitude of the magnetic field 31 that the non-contact IC card 31 receives does not occur. 即ち、コイル41の周りに作られる磁力線42の線形は、リーダライタ32を取り付ける壁が木製であっても、あるいは、 That is, the linear magnetic field lines 42 produced around the coil 41, even wall mounting the reader writer 32 is a wood or,
フェライト製であっても、鉄板35の表面上で鉄板35 It is made of ferrite, iron plate on the surface of the iron plate 35 35
と平行になるので、常に同一の形をとる。 Since parallel and always take the same form. したがって、 Therefore,
リーダライタ32が振幅値I ,I の電流をコイル4 Writer 32 is the amplitude value I 1, I 2 of the current coil 4
1に流せば、非接触ICカード31が受ける磁界31の振幅値は常にH ,H になり、非接触ICカード31 Be allowed to flow to 1, the amplitude value of the magnetic field 31 that the non-contact IC card 31 receives is always H 1, H 2, the non-contact IC card 31
の整流回路52の出力電圧53もV ,V になる。 Output voltage 53 of the rectifying circuit 52 also becomes V 1, V 2. このことより、木製の壁34用に調整されたリーダライタ32をフェライト製の壁36に取り付けても、非接触I This shows that, even when fitted with a reader writer 32 that is tuned for wooden wall 34 made of ferrite wall 36, the contactless I
Cカード31のコンパレータ55はH/Lを判別することができる。 Comparator 55 C card 31 can determine the H / L. 【0027】以上で明らかなように、この実施の形態1 [0027] As is clear from the above, in this embodiment 1
によれば、リーダライタ32を壁などの外部物体に取り付ける際、リーダライタ32が発生する磁界を遮蔽する鉄板35をリーダライタ32と外部物体の間に挿入するように構成したので、リーダライタ32を取り付ける外部物体の材質が変化しても、データの送信成功率を維持することができる効果を奏する。 According to, when mounting the reader writer 32 to an external object such as a wall, since the iron plate 35 for shielding the magnetic field reader writer 32 is generated and configured to be inserted between the reader writer 32 and an external object, the reader writer 32 even if the material of the external object is changed to attach the present embodiment offers an advantage of being able to maintain the transmission success rate of data. 【0028】実施の形態2. [0028] Embodiment 2. 上記実施の形態1では、リーダライタ32を平板状の壁に取り付けるものについて示したが、図8又は図10に示すように、木製の壁34 In the first embodiment, it has been described as attaching the reader writer 32 on a flat wall, as shown in FIG. 8 or FIG. 10, the wooden walls 34
またはフェライト製の壁36における角部分にリーダライタ32を取り付ける場合には、図9又は図11に示すように、形状が立体的な鉄板35(例えば、蓋のない箱型形状の鉄板35)をリーダライタ32と壁34,36 Or when the corner portion in the ferrite of the wall 36 attached to the reader-writer 32, as shown in FIG. 9 or 11, the shape steric iron plate 35 (e.g., an iron plate 35 of the box-shaped uncovered) writer 32 and the wall 34, 36
の間に挿入するようにすればよい。 It is sufficient to be inserted between the. これにより、リーダライタ32の取付場所が変化しても、磁力線42の線形が変化しないので、例えば、リーダライタ32を壁3 Thus, even after changing the mounting location of the reader-writer 32, the linear magnetic field lines 42 is not changed, for example, the reader-writer 32 walls 3
4,36の角部分に取り付ける場合でも、データの送信成功率を維持することができる効果を奏する。 Even when attaching the corner portion of the 4,36 offers an advantage of being able to maintain the transmission success rate of data. 【0029】実施の形態3. [0029] Embodiment 3. 上記実施の形態1では、穴が開いていない鉄板35を用いるものについて示したが、図12〜図15に示すように、網目構造の鉄板35 In the first embodiment, has been described as using an iron plate 35 having a hole is not opened, as shown in FIGS. 12 to 15, the network structure steel plate 35
aを用いるようにしてもよく、上記実施の形態1と同様の効果を奏することができる。 May be used to a, it is possible to obtain the same advantages as the first embodiment. 即ち、網目構造の鉄板3 In other words, the iron plate 3 of the network structure
5aを用いる場合でも、磁力線42は鉄板35aの表面上では鉄板35aと平行になるので、上記実施の形態1 Even when using 5a, since the magnetic field lines 42 is parallel to the iron plate 35a is on the surface of the iron plate 35a, the above-mentioned embodiments 1
と同様の効果を奏することができる。 It is possible to achieve the same effect as. 【0030】実施の形態4. [0030] Embodiment 4. 上記実施の形態2では、穴が開いていない鉄板35を用いるものについて示したが、図16〜図19に示すように、網目構造の鉄板35 In the second embodiment, has been described as using an iron plate 35 having a hole is not opened, as shown in FIGS. 16 to 19, the network structure steel plate 35
aを用いるようにしてもよく、上記実施の形態2と同様の効果を奏することができる。 May be used to a, it is possible to obtain the same effect as the second embodiment. 即ち、網目構造の鉄板3 In other words, the iron plate 3 of the network structure
5aを用いる場合でも、磁力線42は鉄板35aの表面上では鉄板35aと平行になるので、上記実施の形態2 Even when using 5a, since the magnetic field lines 42 is parallel to the iron plate 35a is on the surface of the iron plate 35a, the second embodiment
と同様の効果を奏することができる。 It is possible to achieve the same effect as. 【0031】 【発明の効果】以上のように、この発明によれば、リーダライタを外部物体に取り付ける際、リーダライタが発生する磁界を遮蔽する遮蔽部材をリーダライタと外部物体の間に挿入するように構成したので、リーダライタを取り付ける外部物体の材質が変化しても、データの送信成功率を維持することができる効果がある。 [0031] As is evident from the foregoing description, according to the present invention, when mounting the reader writer to an external object, inserting a shielding member for shielding a magnetic field reader writer is generated between the writer and the external object since it is configured as, even if the material of the external object attaching the writer is changed, there is an effect that it is possible to maintain the transmission success rate of data. 【0032】この発明によれば、導体を用いて遮蔽部材を構成するようにしたので、構成の複雑化を招くことなく、リーダライタが発生する磁界を遮蔽することができる効果がある。 [0032] According to the present invention, since so as to constitute a shielding member with a conductor, without complicating the configuration, there is an effect capable of blocking a magnetic field reader writer generates. 【0033】この発明によれば、鉄板を用いて遮蔽部材を構成するようにしたので、製品のコスト高を抑制することができる効果がある。 [0033] According to the present invention, since so as to constitute a shielding member with an iron plate, there is an effect capable of suppressing cost of the product. 【0034】この発明によれば、形状が立体的な遮蔽部材を用いるように構成したので、リーダライタの取付場所が変化しても、同一線形の磁力線が得られる効果がある。 According to the present invention, since the shape was configured to use a three-dimensional shielding member, even if the mounting location of the reader-writer is changed, the effect of co-linear lines of magnetic force can be obtained. 【0035】この発明によれば、蓋のない箱型形状の遮蔽部材を用いるように構成したので、例えば、リーダライタを壁の角部分に取り付ける場合でも、データの送信成功率を維持することができる効果がある。 According to this invention, since it is configured to use a shielding member of box-shaped uncovered, for example, even when mounting the writer at the corner portion of the wall, to maintain the transmission success rate of data there can be effectively. 【0036】この発明によれば、網目構造の遮蔽部材を用いるように構成したので、製品のコスト高を抑制することができる効果がある。 According to the present invention, since it is configured to use a shielding member of a network structure, there is an effect capable of suppressing cost of the product.

【図面の簡単な説明】 【図1】 この発明の実施の形態1によるデータ通信装置を示す構成図である。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a data communication apparatus according to Embodiment 1 of the present invention. 【図2】 この発明の実施の形態1によるデータ通信装置の電気的な特性を示す説明図である。 FIG. 2 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 1 of the present invention. 【図3】 非接触ICカードのデータ受信部を示す構成図である。 3 is a block diagram illustrating a data receiving unit of the contactless IC card. 【図4】 非接触ICカードのカードコイルが受信する信号波形等を示す波形図である。 4 is a waveform diagram showing a signal waveform like a card coil receives the contactless IC card. 【図5】 この発明の実施の形態1によるデータ通信装置の処理内容を示すフローチャートである。 5 is a flowchart showing the processing contents of according to the first communication apparatus of the present invention. 【図6】 この発明の実施の形態1によるデータ通信装置を示す構成図である。 6 is a block diagram showing a data communication apparatus according to Embodiment 1 of the present invention. 【図7】 この発明の実施の形態1によるデータ通信装置の電気的な特性を示す説明図である。 7 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 1 of the present invention. 【図8】 この発明の実施の形態2によるデータ通信装置を示す構成図である。 8 is a block diagram illustrating a data communication apparatus according to Embodiment 2 of the present invention. 【図9】 この発明の実施の形態2によるデータ通信装置の電気的な特性を示す説明図である。 9 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 2 of the present invention. 【図10】 この発明の実施の形態2によるデータ通信装置を示す構成図である。 10 is a block diagram illustrating a data communication apparatus according to Embodiment 2 of the present invention. 【図11】 この発明の実施の形態2によるデータ通信装置の電気的な特性を示す説明図である。 11 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 2 of the present invention. 【図12】 この発明の実施の形態3によるデータ通信装置を示す構成図である。 12 is a block diagram illustrating a data communication apparatus according to Embodiment 3 of the present invention. 【図13】 この発明の実施の形態3によるデータ通信装置の電気的な特性を示す説明図である。 13 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 3 of the present invention. 【図14】 この発明の実施の形態3によるデータ通信装置を示す構成図である。 14 is a block diagram illustrating a data communication apparatus according to Embodiment 3 of the present invention. 【図15】 この発明の実施の形態3によるデータ通信装置の電気的な特性を示す説明図である。 15 is an explanatory diagram showing the electrical properties of the according to a third embodiment of the present invention the data communication device. 【図16】 この発明の実施の形態4によるデータ通信装置を示す構成図である。 16 is a block diagram illustrating a data communication apparatus according to Embodiment 4 of the present invention. 【図17】 この発明の実施の形態4によるデータ通信装置の電気的な特性を示す説明図である。 17 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 4 of the present invention. 【図18】 この発明の実施の形態4によるデータ通信装置を示す構成図である。 18 is a block diagram illustrating a data communication apparatus according to Embodiment 4 of the present invention. 【図19】 この発明の実施の形態4によるデータ通信装置の電気的な特性を示す説明図である。 19 is an explanatory diagram showing the electrical characteristics of the data communication apparatus according to Embodiment 4 of the present invention. 【図20】 従来のデータ通信装置を示す構成図である。 FIG. 20 is a block diagram showing a conventional data communication apparatus. 【図21】 従来のデータ通信装置の電気的な特性を示す説明図である。 21 is an explanatory diagram showing the electrical characteristics of a conventional data communication apparatus. 【図22】 非接触ICカードのデータ受信部を示す構成図である。 FIG. 22 is a configuration diagram showing a data receiving portion of the non-contact IC card. 【図23】 非接触ICカードのカードコイルが受信する信号波形等を示す波形図である。 23 is a waveform diagram showing a signal waveform like a card coil of the contactless IC card is received. 【図24】 従来のデータ通信装置を示す構成図である。 Figure 24 is a block diagram showing a conventional data communication apparatus. 【図25】 従来のデータ通信装置の電気的な特性を示す説明図である。 FIG. 25 is an explanatory diagram showing the electrical characteristics of a conventional data communication apparatus. 【図26】 非接触ICカードのカードコイルが受信する信号波形等を示す波形図である。 26 is a waveform diagram showing a signal waveform like a card coil of the contactless IC card is received. 【符号の説明】 31 非接触ICカード、32 リーダライタ、33 [Description of Reference Numerals] 31 non-contact IC card, 32 reader-writer, 33
固定材、34 木製の壁(外部物体)、35 鉄板(遮蔽部材)、35a 網目構造の鉄板(遮蔽部材)、36 Fixing material, 34 wooden walls (external object), 35 iron plate (shielding member) of 35a meshwork iron plate (shielding member) 36
フェライト製の壁(外部物体)、41 コイル、42 Ferrite wall (external object), 41 coils, 42
磁力線、43磁界、51 カードコイル、52 整流回路、53 整流回路の出力電圧、54 レギュレータ、55 コンパレータ、56 復調回路。 Magnetic force lines, 43 fields, 51 card coil, 52 a rectifier circuit, the output voltage of the 53 rectifier circuit, 54 a regulator, 55 a comparator, 56 a demodulation circuit.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 礒田 陽次 東京都千代田区丸の内二丁目2番3号 三 菱電機株式会社内Fターム(参考) 5B058 CA17 KA24 KA29 YA20 5K012 AA04 AB03 AC06 AC08 AC10 AE13 BA02 ────────────────────────────────────────────────── ─── front page of the continuation (72) inventor Yoji Isoda, Chiyoda-ku, tokyo Marunouchi 2-chome No. 2 No. 3 Mitsubishi electric Co., Ltd. in the F-term (reference) 5B058 CA17 KA24 KA29 YA20 5K012 AA04 AB03 AC06 AC08 AC10 AE13 BA02

Claims (1)

  1. 【特許請求の範囲】 【請求項1】 データの送受信機能を有する非接触IC Non-contact IC having Claims We claim: 1. A transmission and reception function of data
    カードと、非接触の状態を保持しながら電力を上記非接触ICカードに供給するとともに、上記非接触ICカードとデータの送受信を実施するリーダライタとを備えたデータ通信装置において、上記リーダライタを外部物体に取り付ける際、上記リーダライタが発生する磁界を遮蔽する遮蔽部材を上記リーダライタと上記外部物体の間に挿入することを特徴とするデータ通信装置。 A card, the power while maintaining a non-contact state is supplied to the contactless IC card, the data communication apparatus and a reader-writer to carry out transmission and reception of the contactless IC card and data, the reader-writer when attaching the external object, a data communication apparatus characterized by inserting a shielding member for shielding a magnetic field that the writer is generated between the writer and the external object. 【請求項2】 導体を用いて遮蔽部材を構成することを特徴とする請求項1記載のデータ通信装置。 2. A data communication apparatus according to claim 1, characterized in that it constitutes a shielding member with a conductor. 【請求項3】 鉄板を用いて遮蔽部材を構成することを特徴とする請求項2記載のデータ通信装置。 3. A data communication apparatus according to claim 2, characterized in that it constitutes a shielding member with an iron plate. 【請求項4】 形状が立体的な遮蔽部材を用いることを特徴とする請求項1から請求項3のうちのいずれか1項記載のデータ通信装置。 4. A shape data communication apparatus according to any one of claims 1 to 3, characterized by using a three-dimensional shielding member. 【請求項5】 蓋のない箱型形状の遮蔽部材を用いることを特徴とする請求項4記載のデータ通信装置。 5. A data communication apparatus according to claim 4, characterized by using a shielding member of box-shaped uncovered. 【請求項6】 網目構造の遮蔽部材を用いることを特徴とする請求項1から請求項5のうちのいずれか1項記載のデータ通信装置。 6. A data communication apparatus according to any one of claims 1 to 5 which comprises using a shielding member of a network structure.
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