JPH11274975A - Communication system - Google Patents

Communication system

Info

Publication number
JPH11274975A
JPH11274975A JP10093899A JP9389998A JPH11274975A JP H11274975 A JPH11274975 A JP H11274975A JP 10093899 A JP10093899 A JP 10093899A JP 9389998 A JP9389998 A JP 9389998A JP H11274975 A JPH11274975 A JP H11274975A
Authority
JP
Japan
Prior art keywords
card
power
master station
circuit
communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10093899A
Other languages
Japanese (ja)
Other versions
JP3557342B2 (en
Inventor
Shoji Saito
正二 斎藤
Yoshinobu Ueda
善信 上田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osaki Electric Co Ltd
Original Assignee
Osaki Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osaki Electric Co Ltd filed Critical Osaki Electric Co Ltd
Priority to JP09389998A priority Critical patent/JP3557342B2/en
Publication of JPH11274975A publication Critical patent/JPH11274975A/en
Application granted granted Critical
Publication of JP3557342B2 publication Critical patent/JP3557342B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

PROBLEM TO BE SOLVED: To reduce the power consumption of a master station and to enhance the reliability of communication in a communication system that is configured, such that a slave station receives a propagated energy sent from the master station and obtains power for its own operation from the received propagation energy to communicate with the master station. SOLUTION: In a communication system, wherein a slave station receives energy emitted from a master station, obtains power for its operation from the received propagated energy and makes communication with the master station, the strength of the propagated energy sent by the master station is decreased, when the master station is not communicating with the slave station (#2-#4).

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、子局が親局により
発射されたエネルギー伝播を受信し、受信したエネルギ
伝播ーから子局が動作するための電力を得て親局と通信
を行うように構成された通信システムの改良に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slave station that receives energy propagation emitted by a master station and obtains power for operating the slave station from the received energy propagation to communicate with the master station. The present invention relates to an improvement of a communication system configured as described above.

【0002】[0002]

【従来の技術】図6は従来のこの種の通信システムの一
例を示すブロック図である。親局としてのICカード読
み書き装置2は、子局としての非接触式ICカード8に
対する読み書き装置で、非接触式ICカード8と無線通
信を行うことにより非接触式ICカード8内に内蔵され
ているメモリの内容の読み取りや書き込みを行う装置
で、それらの記憶内容を処理するパソコン等の上位装置
1と接続されており、上位装置1からの指示で動作する
ような構成になっている。制御回路3は送信回路3Aと
受信回路3Bを含み、それぞれデータの送信と受信をも
行う。同様に、非接触式ICカード8内の制御回路7に
もメモリや送信回路、受信回路(いずれも図示せず)が
含まれている。
2. Description of the Related Art FIG. 6 is a block diagram showing an example of a conventional communication system of this kind. The IC card read / write device 2 as a master station is a read / write device for the non-contact IC card 8 as a slave station, and is built in the non-contact IC card 8 by performing wireless communication with the non-contact IC card 8. It is a device that reads and writes the contents of a memory that is connected to a higher-level device 1 such as a personal computer that processes those stored contents, and operates according to instructions from the higher-level device 1. The control circuit 3 includes a transmission circuit 3A and a reception circuit 3B, and also performs transmission and reception of data, respectively. Similarly, the control circuit 7 in the non-contact type IC card 8 also includes a memory, a transmission circuit, and a reception circuit (all not shown).

【0003】また、非接触式ICカード8が動作するた
めの電力は非接触式ICカード8がICカード読み書き
装置2に近づいた(例えば数cmの距離)時にICカー
ド読み書き装置2からの電波を受信し、その受信した電
波の電力で電源を得て、動作するような構成となってい
る。
The electric power required for the operation of the non-contact type IC card 8 is transmitted when the non-contact type IC card 8 approaches the IC card read / write device 2 (for example, a distance of several cm). It is configured to receive power, obtain power from the received radio wave power, and operate.

【0004】図7は図6に示された電源回路6の回路例
を示す。図7において、ICカード読み書き装置2の電
力送信及びデータ送受信用のアンテナコイル4から発射
された電波は、電力受信及びデータ送受信用のアンテナ
コイル5とコンデンサ14とで構成された共振回路13
で受信され、その得られた電圧はダイオード9で整流さ
れ、コンデンサ10に貯えられる。コンデンサ10の電
圧は、制御回路7が動作可能な電圧レベルであるかどう
かを電圧監視回路12により判断される。電圧監視回路
12は、動作可能な電圧レベルであると判断した場合に
はトランジスタ11をオンにスイッチングさせて、制御
回路7に電力を供給する。これにより、制御回路7は動
作を開始して、ICカード読み書き装置2と通信が可能
となる。
FIG. 7 shows a circuit example of the power supply circuit 6 shown in FIG. 7, a radio wave emitted from an antenna coil 4 for power transmission and data transmission / reception of the IC card read / write device 2 is transmitted to a resonance circuit 13 composed of an antenna coil 5 for power reception and data transmission / reception and a capacitor 14.
, And the obtained voltage is rectified by the diode 9 and stored in the capacitor 10. The voltage of the capacitor 10 is determined by the voltage monitoring circuit 12 to determine whether the voltage is at a voltage level at which the control circuit 7 can operate. When determining that the voltage level is operable, the voltage monitoring circuit 12 switches on the transistor 11 to supply power to the control circuit 7. As a result, the control circuit 7 starts operating and can communicate with the IC card read / write device 2.

【0005】図8は非接触式ICカード8の読み取り位
置を示す断面図である。非接触式ICカード8は位置8
a、位置8b、位置8cと移動し、電力供給可能エリア
15及びその近傍を通過する。電力供給可能エリア15
は、ICカード読み書き装置2に内蔵されているアンテ
ナコイル4から発射される電波によって非接触式ICカ
ード8に対し電力が供給可能なエリアを示している。非
接触式ICカード8が位置8aから位置8bに移動する
ことによりコンデンサ10に貯えられる電圧が増加す
る。この電圧が規定電圧レベルに達すると、電圧監視回
路12がトランジスタ11をオンにし、コンデンサ10
から非接触式ICカード8の制御回路7に電力が供給さ
れることによって、非接触式ICカード8の制御回路7
が動作を開始し、ICカード読み書き装置2との通信を
開始する。
FIG. 8 is a sectional view showing a reading position of the non-contact type IC card 8. Non-contact IC card 8 is at position 8
a, the position 8b, and the position 8c, and pass through the power supplyable area 15 and its vicinity. Power supply area 15
Indicates an area where power can be supplied to the non-contact type IC card 8 by radio waves emitted from the antenna coil 4 built in the IC card reading / writing device 2. As the non-contact type IC card 8 moves from the position 8a to the position 8b, the voltage stored in the capacitor 10 increases. When this voltage reaches the specified voltage level, the voltage monitoring circuit 12 turns on the transistor 11 and the capacitor 10
Is supplied to the control circuit 7 of the non-contact type IC card 8 from the
Starts operation, and starts communication with the IC card read / write device 2.

【0006】また、従来、電波を用いてデータの送受信
を行う非接触式ICカードの電源に関する提案として特
開平8ー69513号公報がある。この公報では、電池
内蔵式のカードと電池レス式のカードの長所を融合さ
せ、電池の寿命ひいてはカードの寿命を延ばし、かつ、
長い通信距離が得られるようにするために、受信する電
波が強い場合には、電源として、受信した電波から電力
を得て充電されるコンデンサを用い、受信する電波が弱
い場合には、電源として、一次電池を用いるようにして
いる。
Japanese Patent Application Laid-Open No. Hei 8-69513 has proposed a power supply for a non-contact type IC card which transmits and receives data using radio waves. In this publication, the advantages of a battery-incorporated card and a battery-less card are combined to extend the life of the battery, and thus the life of the card, and
In order to obtain a long communication distance, use a capacitor that is charged by obtaining power from the received radio wave when the received radio wave is strong, and use it as a power supply when the received radio wave is weak. And a primary battery.

【0007】[0007]

【発明が解決しようとする課題】ICカード読み書き装
置2のアンテナコイル4から発射される電波は四方八方
に発射され、その一部を非接触式ICカード8のアンテ
ナコイル5で受信するため、電力伝送の効率としては非
常に悪いものになっている。また、非接触式ICカード
8がICカード読み書き装置2に何時近づけられるかが
不明なため、ICカード読み書き装置2のアンテナコイ
ル4から常時電波を出力させなければならず、非接触式
ICカード8と通信していない場合でもICカード読み
書き装置2が電力を消費するという不具合がある。
The radio waves emitted from the antenna coil 4 of the IC card reading / writing device 2 are emitted in all directions, and a part of the radio waves is received by the antenna coil 5 of the non-contact type IC card 8. The transmission efficiency is very poor. Further, since it is unclear when the non-contact type IC card 8 can be approached to the IC card read / write device 2, radio waves must always be output from the antenna coil 4 of the IC card read / write device 2. There is a problem that the IC card read / write device 2 consumes power even when it is not communicating with the IC card.

【0008】さらに、図8に示されるように、非接触式
ICカード8が電力供給可能エリア15に入って、IC
カード読み書き装置2との通信を開始した後、非接触式
ICカード8は位置8cに移動することになるため、図
7のコンデンサ10の電圧が減少し、電圧監視回路12
により制御回路7への電力供給が遮断される。したがっ
て、非接触式ICカード8が電力供給可能エリア15及
びその近傍を通過する場合、その電力供給可能エリア1
5が小さいものであると、制御回路7は一旦動作可能に
なるものの、即動作不可能な状態になり、通信が途中で
中断されるという大きな問題がある。そして、その際
に、非接触式ICカード8の内部メモリに書き込み動作
を行っていた場合は、書き込みが途中で終了し、信頼性
上大きな問題がある。
Further, as shown in FIG. 8, the non-contact type IC card 8 enters the power-suppliable area 15 and
After starting communication with the card reading / writing device 2, the non-contact type IC card 8 moves to the position 8c, so that the voltage of the capacitor 10 in FIG.
As a result, power supply to the control circuit 7 is cut off. Therefore, when the non-contact IC card 8 passes through the power supply area 15 and its vicinity, the power supply area 1
If the number 5 is small, the control circuit 7 becomes operable once, but immediately becomes inoperable, and there is a major problem that communication is interrupted halfway. At this time, if the writing operation is being performed on the internal memory of the non-contact type IC card 8, the writing is completed halfway, and there is a serious problem in reliability.

【0009】特開平8ー69513号公報にて提案され
たものは、一次電池を使用しているために、非接触式I
Cカードが大型となり、また、一次電池の寿命を考慮し
た使い方をしなければならない等の問題がある。。(発
明の目的)本発明の目的は、子局が親局から発射された
エネルギー伝播を受信し、受信したエネルギー伝播から
子局が動作するための電力を得て親局と通信を行うよう
に構成された通信システムにおいて、親局の消費電力を
低く抑えることができると共に、通信の信頼性を向上さ
せることができる通信システムを提供することである。
The one proposed in Japanese Patent Application Laid-Open No. Hei 8-69513 uses a non-contact type I because of the use of a primary battery.
There is a problem that the C card becomes large and that the usage must be made in consideration of the life of the primary battery. . (Object of the Invention) An object of the present invention is to allow a slave station to receive energy propagation emitted from a master station, obtain power for operating the slave station from the received energy propagation, and communicate with the master station. An object of the present invention is to provide a communication system that can reduce power consumption of a master station and improve communication reliability in a configured communication system.

【0010】[0010]

【課題を解決するための手段】上記目的を達成するため
に、本発明は、子局が親局から発射されたエネルギー伝
播を受信し、受信したエネルギー伝播から前記子局が動
作するための電力を得て前記親局と通信を行うように構
成された通信システムにおいて、前記親局が前記子局と
通信していないときに前記親局が発射するエネルギー伝
播の強さを小さくするようにしたことを特徴とするもの
である。
SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a mobile station that receives energy propagation emitted from a master station and uses the received energy propagation to operate the mobile station based on the received power. In the communication system configured to perform communication with the master station, the strength of the energy propagation emitted by the master station when the master station is not communicating with the slave station is reduced. It is characterized by the following.

【0011】なお、本発明における「エネルギー伝播」
は、電波、静電誘導、電磁誘導を含む用語として使用さ
れるものである。
In the present invention, "energy propagation"
Is used as a term that includes radio waves, electrostatic induction, and electromagnetic induction.

【0012】[0012]

【発明の実施の形態】本発明の実施の一形態による通信
システム全体は、図6に示される従来のものと同一であ
り、親局としてICカード読み書き装置2が用いられ、
子局として非接触式ICカード8が用いられる。非接触
式ICカード8の使い方としては、人間が非接触式IC
カード8をICカード読み書き装置2にかざすことを想
定している。なお、エネルギー伝播の形態としては電波
を用いている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The whole communication system according to one embodiment of the present invention is the same as the conventional communication system shown in FIG. 6, and an IC card read / write device 2 is used as a master station.
A non-contact IC card 8 is used as a slave station. As for the usage of the non-contact IC card 8,
It is assumed that the card 8 is held over the IC card read / write device 2. Note that radio waves are used as a form of energy propagation.

【0013】図1は本発明の実施の一形態におけるIC
カード読み書き装置2の制御回路3の一部を示すブロッ
ク図であり、電力の送信とデータの送信を同一のアンテ
ナで構成する場合の例である。
FIG. 1 shows an IC according to an embodiment of the present invention.
FIG. 4 is a block diagram illustrating a part of a control circuit 3 of the card reading / writing device 2, which is an example of a case where power transmission and data transmission are configured by the same antenna.

【0014】データ発生回路21から出力されるデータ
により、発振回路22の搬送波は変調回路23において
変調され、低電力用増幅回路24あるいは高電力用増幅
回路25で増幅され、それぞれ低電力送信用アンテナコ
イル26、高電力送信用アンテナコイル27にて外部に
電波として放出される。低電力用増幅回路24、高電力
用増幅回路25は同時には動作せず、切換回路28によ
り後述するようにどちらか一方が選択され、動作するよ
うな構成となっている。
In accordance with the data output from the data generation circuit 21, the carrier wave of the oscillation circuit 22 is modulated by the modulation circuit 23 and amplified by the low power amplification circuit 24 or the high power amplification circuit 25. The coil 26 and the high-power transmission antenna coil 27 emit radio waves to the outside. The low-power amplifier circuit 24 and the high-power amplifier circuit 25 do not operate at the same time, and one of them is selected and operated by the switching circuit 28 as described later.

【0015】非接触式ICカード8が発射した電波は受
信用アンテナコイル29により受信され、増幅回路30
により増幅され、復調回路31により復調される。この
ようにして、非接触式ICカード8から読み取られたデ
ータはデータ処理回路32にて処理され、その処理結果
に応じて切換回路28及びデータ発生回路21が制御さ
れる。
Radio waves emitted by the non-contact type IC card 8 are received by the receiving antenna coil 29 and are amplified by the amplifying circuit 30.
And demodulated by the demodulation circuit 31. Thus, the data read from the non-contact type IC card 8 is processed by the data processing circuit 32, and the switching circuit 28 and the data generation circuit 21 are controlled according to the processing result.

【0016】図2は低電力送信用アンテナコイル26、
高電力送信用アンテナコイル27の配置の例を示した外
観図で、低電力送信用アンテナコイル26の外側に高電
力送信用アンテナコイル27が同心円状に配置されてい
る。なお、受信用アンテナコイル29の図示は省略され
ている。
FIG. 2 shows a low-power transmitting antenna coil 26,
FIG. 4 is an external view showing an example of the arrangement of the high-power transmitting antenna coil 27, in which the high-power transmitting antenna coil 27 is arranged concentrically outside the low-power transmitting antenna coil 26. The illustration of the receiving antenna coil 29 is omitted.

【0017】図3は、切換回路28による低電力用増幅
回路24と高電力用増幅回路25の切換動作等を示すフ
ローチャートである。ステップ1にてICカード読み書
き装置2の電源がオンになると、高電力増幅回路25を
動作させずに、低電力増幅回路24のみを動作させる。
これにより、図4に示されるように、電力供給可能エリ
ア15aが構成される。その後、非接触式ICカード8
が近づいて、電力供給可能エリア15aに入る位置8b
に移動すると、前述したように、非接触式ICカード8
はICカード読み書き装置2から電力の供給を受け、I
Cカード読み書き装置2と通信を開始する。この通信開
始の時点で、非接触式ICカード8は、通信が可能にな
ったことを知らせる制御コードの電波を発射するので、
ICカード読み書き装置2はこの制御コードの電波を受
信し、データ処理回路32が通信開始を識別して、切換
回路28にそれを知らせる。切換回路28はステップ3
にて非接触式ICカード8が近づいてきたことを判定
し、ステップ4にて低電力用増幅回路器24の動作を停
止させ、高電力用増幅回路25を動作させる。このこと
により、図4に示されるように、電力供給可能エリア1
5aが電力供給可能エリア15bへと広がり、従来では
通信が不可能だった位置8cでの通信も可能となる。
FIG. 3 is a flow chart showing the switching operation between the low power amplifier circuit 24 and the high power amplifier circuit 25 by the switching circuit 28, and the like. When the power supply of the IC card read / write device 2 is turned on in step 1, only the low power amplifier circuit 24 is operated without operating the high power amplifier circuit 25.
Thereby, as shown in FIG. 4, a power supplyable area 15a is configured. Then, contactless IC card 8
8b approaching and entering the power supplyable area 15a
Move to the non-contact IC card 8 as described above.
Receives power from the IC card read / write device 2,
Communication with the C card read / write device 2 is started. At the time of starting the communication, the non-contact type IC card 8 emits a radio wave of a control code indicating that communication is enabled.
The IC card reader / writer 2 receives the radio wave of the control code, the data processing circuit 32 identifies the start of communication, and notifies the switching circuit 28 of it. The switching circuit 28 performs step 3
, It is determined that the non-contact type IC card 8 is approaching. In step 4, the operation of the low power amplifier circuit 24 is stopped, and the high power amplifier circuit 25 is operated. As a result, as shown in FIG.
5a spreads to the power supply available area 15b, and communication at the position 8c where communication was impossible in the past is also possible.

【0018】ステップ5にてデータ処理回路32は非接
触式ICカード8との間で必要なデータの読み書き動作
を行い、ステップ6にて読み書き動作の終了を判定する
と、ステップ2に戻り、再び、高電力増幅回路25の動
作を停止させて、低電力増幅回路24を動作させる。こ
れで、初期状態に戻り、次の非接触式ICカードとの通
信に備えることができる。図5はこの時の消費電力の推
移を示した図で、通信時間T1 及び通信時間T2 の時の
消費電力Wは通信していない時の消費電力W0と比べて
大きくなっている。
In step 5, the data processing circuit 32 performs a necessary data read / write operation with the non-contact type IC card 8, and when it is determined in step 6 that the read / write operation is completed, the process returns to step 2 and again. The operation of the high power amplifier circuit 25 is stopped, and the low power amplifier circuit 24 is operated. This returns to the initial state and prepares for communication with the next non-contact type IC card. Figure 5 is a diagram showing the transition of power consumption when the power consumption W when the communication time T 1 and the communication time T 2 are is larger than the power consumption W 0 when not communicating.

【0019】以上のように、非接触式ICカード8がか
なりの速度で移動しているとしても、非接触式ICカー
ド8への電力供給の時間を従来と比べて比較的長くとる
ことができるので、読み書きを確実に行うことができ、
信頼性を向上させることができる。また、通信していな
い時の消費電力W0 を小さくすることができるので、省
エネルギタイプとすることができる。
As described above, even if the non-contact type IC card 8 moves at a considerable speed, the time for supplying power to the non-contact type IC card 8 can be made relatively long as compared with the conventional case. So I can read and write reliably,
Reliability can be improved. Further, since the power consumption W 0 when no communication is performed can be reduced, an energy saving type can be achieved.

【0020】本実施の形態では、電力送信用或いは電力
受信用とデータ送受信用のアンテナコイルを共用してい
る例を説明したが、電力送信用或いは電力受信用とデー
タ送受信用のアンテナコイルを別々に設けても良い。
In this embodiment, an example is described in which the antenna coil for power transmission or power reception and the antenna coil for data transmission and reception are shared, but the antenna coil for power transmission or power reception and the antenna coil for data transmission and reception are separately provided. May be provided.

【0021】また、親局としてICカード読み書き装置
を用い、子局として非接触式ICカードを用いている
が、それには限定されない。
Further, although an IC card read / write device is used as a master station and a non-contact type IC card is used as a slave station, the present invention is not limited to this.

【0022】以上は実施の形態として電波による電力の
送受信を示したが、静電誘導や電磁誘導による電力の送
受信を用いても同等の効果が得られることは明白であ
る。
Although the transmission and reception of electric power by radio waves has been described as an embodiment, it is apparent that the same effect can be obtained by using the transmission and reception of electric power by electrostatic induction or electromagnetic induction.

【0023】本発明の用途としては自動改札装置等が好
適である。
As an application of the present invention, an automatic ticket gate and the like are suitable.

【0024】[0024]

【発明の効果】以上説明したように、本発明によれば、
子局が親局から発射されたエネルギー伝播を受信し、受
信したエネルギー伝播から子局が動作するための電力を
得て親局と通信を行うように構成された通信システムに
おいて、親局が子局と通信していないときに親局が発射
するエネルギー伝播の強さを小さくするようにしたか
ら、親局の消費電力を低く抑えることができると共に、
通信の信頼性を向上させることができる。
As described above, according to the present invention,
In a communication system in which a slave station receives energy propagation emitted from a master station and obtains power for operating the slave station from the received energy propagation to communicate with the master station, the master station communicates with the master station. Since the strength of the energy propagation emitted by the master station when not communicating with the station is reduced, the power consumption of the master station can be kept low,
The reliability of communication can be improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の一形態である通信システムのI
Cカード読み書き装置の制御回路の一部を示すブロック
図である。
FIG. 1 illustrates a communication system according to an embodiment of the present invention.
It is a block diagram which shows a part of control circuit of a C card reading / writing apparatus.

【図2】図1の低電力送信用アンテナコイルと高電力送
信用アンテナコイルの配置の一例を示す平面図である。
FIG. 2 is a plan view showing an example of an arrangement of a low-power transmitting antenna coil and a high-power transmitting antenna coil of FIG. 1;

【図3】図1の切換回路による切換動作等を示すフロー
チャートである。
FIG. 3 is a flowchart showing a switching operation and the like by the switching circuit of FIG. 1;

【図4】本発明の実施の一形態である通信システムのI
Cカード読み書き装置による電力供給可能エリアの変化
及び非接触式ICカードの移動軌跡を示す図である。
FIG. 4 illustrates a communication system according to an embodiment of the present invention;
It is a figure which shows the change of the electric power supply possible area | region by a C card reader / writer, and the movement locus of a non-contact type IC card.

【図5】本発明の実施の一形態である通信システムのI
Cカード読み書き装置の消費電力の推移を示す図であ
る。
FIG. 5 illustrates a communication system according to an embodiment of the present invention;
It is a figure showing transition of power consumption of a C card reading / writing device.

【図6】従来形と本発明の実施の一形態とに共通して用
いられる通信システムの概要を示すブロック図である。
FIG. 6 is a block diagram showing an outline of a communication system commonly used in a conventional type and one embodiment of the present invention.

【図7】図6の電源回路の一例を示す回路図である。FIG. 7 is a circuit diagram illustrating an example of a power supply circuit of FIG. 6;

【図8】従来の通信システムのICカード読み書き装置
に対する非接触式ICカードの移動軌跡を示す図であ
る。
FIG. 8 is a diagram showing a movement locus of a non-contact type IC card with respect to an IC card reading / writing device of a conventional communication system.

【符号の説明】[Explanation of symbols]

2 IC読み書き装置 3 制御回路 4 アンテナコイル 5 アンテナコイル 6 電源回路 7 制御回路 8 非接触式ICカード 15a,15b 電力供給可能エリア 21 データ発生回路 22 発振回路 24 低電力用増幅回路 27 高電力用増幅回路 26 低電力送信用アンテナコイル 27 高電力送信用アンテナコイル 28 切換回路 29 受信用アンテナコイル 30 増幅回路 31 復調回路 32 データ処理回路 Reference Signs List 2 IC read / write device 3 control circuit 4 antenna coil 5 antenna coil 6 power supply circuit 7 control circuit 8 non-contact type IC card 15a, 15b power supply available area 21 data generation circuit 22 oscillation circuit 24 low power amplification circuit 27 high power amplification Circuit 26 Low power transmitting antenna coil 27 High power transmitting antenna coil 28 Switching circuit 29 Receiving antenna coil 30 Amplifier circuit 31 Demodulation circuit 32 Data processing circuit

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 子局が親局から発射されたエネルギー伝
播を受信し、受信したエネルギー伝播から前記子局が動
作するための電力を得て前記親局と通信を行うように構
成された通信システムにおいて、前記親局が前記子局と
通信していないときに前記親局が発射するエネルギー伝
播の強さを小さくするようにしたことを特徴とする通信
システム。
1. A communication, wherein a slave station receives energy propagation emitted from a master station, and obtains power for operating the slave station from the received energy propagation to communicate with the master station. A communication system according to claim 1, wherein a strength of energy propagation emitted by said master station when said master station is not communicating with said slave station is reduced.
【請求項2】 エネルギー伝播として電波を用い、前記
子局を電池を備えていない非接触式ICカードとし、前
記親局をICカード読み書き装置とする請求項1記載の
通信システム。
2. The communication system according to claim 1, wherein radio waves are used as energy propagation, said slave station is a non-contact IC card without a battery, and said master station is an IC card reading / writing device.
JP09389998A 1998-03-24 1998-03-24 Communications system Expired - Fee Related JP3557342B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09389998A JP3557342B2 (en) 1998-03-24 1998-03-24 Communications system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09389998A JP3557342B2 (en) 1998-03-24 1998-03-24 Communications system

Publications (2)

Publication Number Publication Date
JPH11274975A true JPH11274975A (en) 1999-10-08
JP3557342B2 JP3557342B2 (en) 2004-08-25

Family

ID=14095339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09389998A Expired - Fee Related JP3557342B2 (en) 1998-03-24 1998-03-24 Communications system

Country Status (1)

Country Link
JP (1) JP3557342B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005303697A (en) * 2004-04-13 2005-10-27 Fujitsu Ltd Information processing apparatus which receives prescribed information, program, storage medium, and method
JP2006197277A (en) * 2005-01-14 2006-07-27 Hitachi Ltd Radio tag and radio communication system
JP2008072226A (en) * 2006-09-12 2008-03-27 Fujitsu Ltd Rf tag reader and method
JP2010233048A (en) * 2009-03-27 2010-10-14 Nec Corp Wireless communication apparatus and wireless communication method
WO2013008333A1 (en) * 2011-07-14 2013-01-17 パイオニア株式会社 Non-contact power transmission antenna
JP2020155043A (en) * 2019-03-22 2020-09-24 オムロン株式会社 Reader/writer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005303697A (en) * 2004-04-13 2005-10-27 Fujitsu Ltd Information processing apparatus which receives prescribed information, program, storage medium, and method
JP2006197277A (en) * 2005-01-14 2006-07-27 Hitachi Ltd Radio tag and radio communication system
JP2008072226A (en) * 2006-09-12 2008-03-27 Fujitsu Ltd Rf tag reader and method
JP2010233048A (en) * 2009-03-27 2010-10-14 Nec Corp Wireless communication apparatus and wireless communication method
WO2013008333A1 (en) * 2011-07-14 2013-01-17 パイオニア株式会社 Non-contact power transmission antenna
JP2020155043A (en) * 2019-03-22 2020-09-24 オムロン株式会社 Reader/writer
CN111723588A (en) * 2019-03-22 2020-09-29 欧姆龙株式会社 Read-write machine

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