JPH1188241A - Data carrier system - Google Patents

Data carrier system

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Publication number
JPH1188241A
JPH1188241A JP9239405A JP23940597A JPH1188241A JP H1188241 A JPH1188241 A JP H1188241A JP 9239405 A JP9239405 A JP 9239405A JP 23940597 A JP23940597 A JP 23940597A JP H1188241 A JPH1188241 A JP H1188241A
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JP
Japan
Prior art keywords
frequency
transmission
interrogator
data
carrier
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Pending
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JP9239405A
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Japanese (ja)
Inventor
Hidekazu Ishii
英一 石井
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Nippon Steel Corp
新日本製鐵株式会社
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Application filed by Nippon Steel Corp, 新日本製鐵株式会社 filed Critical Nippon Steel Corp
Priority to JP9239405A priority Critical patent/JPH1188241A/en
Publication of JPH1188241A publication Critical patent/JPH1188241A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To supply sufficient power for the transmission from a responder to an interrogator even when the responder and the interrogator are located comparatively away from each other. SOLUTION: An interrogator 10 gives a carrier with 1st or 2nd frequency different from each other depending on transmission data selectively to an antenna coil 17. A tuning frequency of a tuning circuit consisting of a transmission reception coil 31 and a tuning capacitor 32 of a responder 30 is selected to be a 3rd frequency that is an intermediate frequency between the 1st frequency and the 2nd frequency. The interrogator 10 sends a carrier with a frequency nearly equal to the 3rd frequency for a prescribed period after data transmission to the responder 30. In the case that the responder 30 conducts a prescribed requiring high power consumption, since the carrier with a frequency nearly equal to the tuning frequency is sent, the degree of coupling is enhanced and the responder 30 produces much more power.

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、データキャリアに関し、質問機と応答機(データキャリア)との間で信号の授受行う非接触式ICカード型のデータキャリアシステムに関する。 The present invention relates to relates to a data carrier, to signal the non-contact IC card-type data carrier system performing exchange between the interrogator and the transponder (data carrier).

【0002】 [0002]

【従来の技術】質問機と応答機のカードとの間で、電磁結合方式又は電磁誘導方式等により信号の授受を行う方式のデータキャリアシステム(例えば、「非接触式IC Between Related Art interrogator and transponder card, data carrier system method that exchanges electromagnetic coupling method or signal by an electromagnetic induction method or the like (e.g., "non-contact IC
カードシステム」として実用化が進められている)が広く知られている。 Commercialization has been advanced as a card system ") is widely known. 特に、搬送波を応答機側で整流して、 In particular, by rectifying a carrier wave in response machine side,
応答機の電力として使用する無電池方式の非接触式IC Non-contact type IC-free battery system used as a power of the response unit
カードシステムがIDカード用、搬送物の認識用タグ等として広く用いられる様になってきた。 Card system ID card, it has become as widely used as a recognition tag or the like conveyed.

【0003】このような電磁結合方式の非接触式ICカードシステムにおいては、質問機は、OSC(発振器) [0003] In the non-contact IC card system of such an electromagnetic coupling method, interrogator, OSC (oscillator)
で発生させた搬送波を送信データに応じて変調し、その変調波をドライバー回路で増幅し、アンテナコイルを駆動して応答機に送信する。 In a was generated carrier modulated according to transmission data, and amplifies the modulated wave in the driver circuit, and transmits to the responder drives the antenna coils. 応答機は、アンテナコイルで質問機からの信号を受信すると、整流回路で搬送波を整流して内部で使用する電力を得るとともに、復調回路で受信信号を復調してデータ処理回路に送り、データ処理回路でデータ処理を行う。 Transponder receives the signal from the interrogator with an antenna coil, with obtaining a power to be used internally rectifies the carrier wave by the rectifier circuit and sent to the data processing circuit demodulates the received signal by the demodulator circuit, data processing perform data processing in the circuit.

【0004】ところで、応答機で使用する電力は質問機から受信した信号を整流回路で整流して発生している。 Meanwhile, electric power used in transponder is generated by rectifying the signal received from the interrogator by the rectifier circuit.
この電力は搬送波の存在する期間に供給されるため、常に連続して信号を送り続ける為に搬送波が常に送り続けられる周波数変調(FSK変調)を施して送信している。 This power is transmitted to be supplied while the presence of the carrier, always subjected to consecutive frequency carrier is always sends continue to continue to send a signal modulated (FSK modulation). 応答機では搬送波の伝達効率を高める為に、アンテナコイルに同調用コンデンサを並列に接続して同調回路を構成し、この同調回路の同調周波数をFSK変調の搬送波の2つの周波数の中心数波数に設定している。 The answering machine in order to increase the transmission efficiency of the carrier, by connecting a tuning capacitor in parallel with the antenna coil constitute a tuning circuit, the tuning frequency of the tuning circuit to the center number wave number of the two frequency of the carrier of FSK modulation It is set.

【0005】 [0005]

【発明が解決しようとする課題】同調回路の同調周波数を搬送波の2つの周波数の中心周波数に設定しているため電力の伝達効率は高くなっている。 Transmission efficiency of the power for which the tuning frequency of the tuning circuit [0006] is set to two central frequencies of the frequency of the carrier wave is high. 応答機での電力の消費量はその内部処理の種類に応じて大きく変化する。 Consumption power at the answering machine will vary greatly depending on the type of internal processing.
質問機からの指令を受け取るスタンバイ状態ではそれほど大きな電力消費はない。 Not too large power consumption in the standby state to receive a command from the interrogator. これに対して、内部メモリとしてEEPROMを使用している場合には、EEPRO In contrast, when using the EEPROM as an internal memory, EEPRO
Mの書き換え時に高電圧を発生させるためのチャージポンプ回路を駆動させるために大きな電力が消費される。 Large power is consumed for driving the charge pump circuit for generating a high voltage when M rewriting.
また、応答機から質問機にデータを送信する場合には受信時の数倍の電力を消費する。 When transmitting data to the interrogator from the transponder consumes several times the power during reception.

【0006】従来のデータキャリアシステムでは、応答機と質問機の距離が応答限界距離に近い場合には、応答機で質問機からの指示を受けてデータを質問機に返そうとすると電力が足りなくて送信出来ないといった問題が発生する事が有った。 [0006] In the conventional data carrier system, when the distance transponder and interrogator is close to the response limit distance, power enough when you return the data in response to an instruction from the interrogator in response machine interrogator without a problem it can not be sent there was to occur. 本発明は従来の問題を解決し、応答機と質問機の距離が比較的遠い場合にも応答機から質問機への送信に十分な電力を供給出来るデータキャリアシステムおよび質問機を提供することを目的とする。 The present invention solves the conventional problems, to provide a transponder with a data carrier system and the interrogator can provide enough power to the transmission from the responder also when the distance interrogator is relatively far to the interrogator for the purpose.

【0007】 [0007]

【課題を解決するための手段】上記課題を解決するために本発明のデータキャリアシステムは、送信コイルと、 Means for Solving the Problems A data carrier system of the present invention in order to solve the above problems, a transmission coil,
前記送信コイルに送信データに応じて第1、第2の異なる2つの周波数を有する搬送波を切り替えて供給する送信回路を有する質問機と、送受信コイルとこれに接続された同調コンデンサとで構成される同調回路と、送受信コイルで受信した信号を整流する整流回路と、整流回路の出力電力で駆動され、質問機からの指示に従って信号処理を行って送信信号を送受信コイルに供給する信号処理回路とを有する応答機とを備えたデータキャリアシステムにおいて、応答機の同調回路の同調周波数は第1、 First in accordance with the transmission data to the transmission coil, composed of a interrogator having a transmitter circuit for supplying switching the carrier wave having a second different two frequencies, a tuning capacitor which is connected to the transmitting and receiving coils thereto a tuning circuit, a rectifier circuit for rectifying the signal received by the transmission and reception coils, are driven by the output power of the rectifier circuit, and a signal processing circuit for supplying a transmission signal by performing signal processing according to an instruction from the interrogator to transmit and receive coils in the data carrier system comprising a transponder having, tuning frequency of the tuning circuit of the responder is first,
第2の周波数の中間の第3の周波数に設定されており、 Is set to the third frequency of the intermediate of the second frequency,
質問機は前記応答機で電力消費の大きな処理を指示する場合にはデータ送信後、第3の周波数の搬送波を送信する。 Interrogator after data transmission in the case of instructing the large processing power consumption in the answering machine, transmitting the carrier of the third frequency.

【0008】また上記課題を解決するために本発明のデータキャリアシステム用質問機は、送信コイルと、異なる周波数を有する第1、第2の搬送波と前記第1、第2 Further data carrier system for the interrogator of the present invention in order to solve the above problems, a transmit coil, different first having a frequency, said second carrier first, second
の搬送波の中間の周波数を有する第3の搬送波を発生させる搬送波発生手段と、送信データの論理値に応じて第1、第2の2つの周波数の搬送波を切り替えて送信コイルに供給するとともに、送信データを送信後の所定期間に第3の搬送波を送信コイルに供給する切換手段を有する。 A carrier generator means for generating a third carrier having the intermediate frequency of the carrier of the first in accordance with the logic value of the transmission data, and supplies to the transmitting coil by switching the carrier wave of the second of the two frequencies, transmission data in a predetermined period after transmitting a has a switching means for supplying the third carrier to the transmitter coil.

【0009】また上記課題を解決するために本発明のデータキャリアシステムでは、送信コイルと、送信コイルに送信データに応じて第1、第2の異なる2つの周波数を有する搬送波を切り替えて供給する送信回路を有する質問機と、送受信コイルとこれに接続された同調コンデンサとで構成される同調回路と、送受信コイルで受信した信号を整流する整流回路と、整流回路の出力電力で駆動され、質問機からの指示に従って信号処理を行って送信信号を送受信コイルに供給する信号処理回路とを有する応答機とを備えたデータキャリアシステムにおいて、 [0009] In the data carrier system of the present invention to solve the above problems, a transmit coil, first in accordance with the transmission data to the transmitting coil, transmitting supplies by switching the carrier wave having a second different two frequencies and interrogator having a circuit, a tuned circuit composed of a tuning capacitor connected a transmitting and receiving coils thereto, a rectifying circuit for rectifying the signal received by the transmission and reception coils, are driven by the output power of the rectifier circuit, the interrogator in the data carrier system including a transponder and a signal processing circuit for supplying a transmission signal by performing signal processing on the transmitting and receiving coils according to an instruction from,
応答機の前記同調回路の同調周波数は第1、第2の周波数の中間の第3の周波数に設定されており、質問機は前記応答機へのデータ送信後の所定期間に前記第3の周波数にほぼ等しい周波数の搬送波を送信する。 The first tuning frequency of the tuning circuit of the transponder, is set to the third frequency of the intermediate of the second frequency, interrogator said third frequency in a predetermined period after the data transmission to the transponder transmitting a carrier wave of a frequency approximately equal to.

【0010】この様に本発明のシステムでは応答機が内部信号処理する時、特に消費電力の大きな処理を行う場合には応答機に同調周波数にほぼ等しい搬送波が送信されるので、結合度が高まり、応答機でより多くの電力を発生させる事が出来る。 [0010] When the responder in a system of such the present invention to process internal signals, since nearly equal carrier in tuning frequency to the transponder is transmitted especially when performing a large processing power consumption, increased binding of , it is possible to generate more power in the answering machine.

【0011】 [0011]

【発明の実施の形態】本発明の実施の形態を図面を用いて説明する。 It will be described with reference to the accompanying drawings of embodiments of the embodiment of the present invention. 図1は本発明の実施の形態のデータキャリアシステムの質問機10及び応答機30の構成を示す図である。 Figure 1 is a diagram showing a configuration of a data carrier system of interrogator 10 and transponder 30 of the embodiment of the present invention. 図において、質問機10は搬送波の基本信号を発生する発振回路11と、発振回路11からの基本信号をそれぞれ異なる分周比で分周して第1、第2、第3の搬送波を発生する分周回路12、13、14と第1、第2、第3の搬送波から1つの搬送波を選択して出力する選択回路15と、出力増幅器16、アンテナコイル1 In the figure, interrogator 10 is an oscillation circuit 11 for generating a basic signal of the carrier, for generating a first, second, third carrier by dividing the basic signal in different division ratios from the oscillation circuit 11 frequency dividing circuit 12, 13, 14 and first, second, and selection circuit 15 third by selecting one carrier from the carrier wave output, the output amplifier 16, an antenna coil 1
7、および同調コンデンサ18を備える。 7, and a tuning capacitor 18. 質問機10は更に、送信信号を生成する内部処理回路19と、アンテナコイル17で受信した信号を処理する復調回路20を備える。 Interrogator 10 further includes an internal processing circuit 19 for generating transmission signals comprises a demodulation circuit 20 for processing the signal received by the antenna coil 17. この図では復調回路20の入力をアンテナコイル17としたが、アンテナコイル17と同心に別途受信コイルを設けてもよい。 Although this figure was the antenna coil 17 to the input of the demodulation circuit 20 may be provided separately receiving coils concentrically with the antenna coil 17.

【0012】応答機30は送受信コイル31と、送受信コイル31に並列に接続された同調コンデンサ32と、 [0012] transponder 30 and the transceiver coil 31, a tuning capacitor 32 connected in parallel to the transmitting and receiving coils 31,
整流回路33と、FSK復調を行う復調回路34、内部処理回路35、変調回路36および送信用負荷回路37 A rectifier circuit 33, a demodulation circuit 34 for performing FSK demodulation, the internal processing circuit 35, modulation circuit 36 ​​and the transmission load circuit 37
を有する。 Having. 内部処理回路35は一般的な信号処理回路と同様に、CPU35a、RAM35b、プログラム等を記憶したROM35c、電気的に書き換え可能なEEP In internal processing circuit 35 similarly to the general signal processing circuit, CPU 35a, RAM 35b, ROM35c that stores a program or the like, an electrically rewritable EEP
ROM35dおよびインタフェース35eを備えている。 It has a ROM35d and interface 35e. なお、整流回路33によって整流された電力は、復調回路34、内部処理回路35、変調回路36に供給される。 Incidentally, electric power rectified by the rectifier circuit 33, demodulation circuit 34, an internal processing circuit 35, is supplied to the modulation circuit 36.

【0013】発振回路11はたとえば4MHzの基準信号を生成する。 The oscillator circuit 11 generates, for example, 4MHz reference signal. この基準信号は第1、第2の分周回路1 This reference signal first, second frequency divider 1
2、13に供給され、第1の分周回路12で1/32に分周された信号(125KHz)と第2の分周回路13 It is supplied to the 2 and 13, 1/32 frequency-divided signal by the first frequency divider 12 and (125 KHz) the second frequency divider 13
で1/34に分周された信号(117.6470588 In 1/34 frequency divided signal (117.6470588
KHz)が得られる。 KHz) is obtained. また基準信号は第3の分周回路1 The reference signal is the third frequency divider 1
4に供給され1/33に分周された信号(121.12 It is supplied to the 4 1/33 frequency divided signal (121.12
12121KHz)の信号を生成する。 To generate a signal of 12121KHz).

【0014】内部処理回路19が論理値“1”のデータの送信を指示する場合には選択回路15で第1の分周回路12の出力を選択して125KHzの信号を出力増幅器16を介してアンテナコイル17に送る。 [0014] internal processing circuit 19 via the output amplifier 16 a signal of 125KHz selects the output of the first divider circuit 12 by the selection circuit 15 in the case of instructing the transmission of data of a logical value "1" and it sends it to the antenna coil 17. 一方、内部処理回路19が論理値“0”のデータの送信を指示する場合には選択回路15で第2の分周回路13の出力を選択して117.6470588KHzの信号を出力増幅器16を介してアンテナコイル17に送る。 On the other hand, via the internal processing circuit 19 is output amplifier 16 a signal 117.6470588KHz selects the output of the second frequency divider 13 by the selection circuit 15 in the case of instructing the transmission of data of a logical value "0" and it sends it to the antenna coil 17 Te.

【0015】応答機30の送受信コイル31と同調コンデンサ32から構成される同調回路の同調周波数は、1 The tuning frequency of the composed tuning circuit and transmitting and receiving coil 31 of the transponder 30 from the tuning capacitor 32, 1
25KHzと117.6470588KHzの2つの周波数の中心、即ちルート(125KHz×117.64 Two central frequencies of 25KHz and 117.6470588KHz, or root (125 KHz × 117.64
70588)=121.2678125KHzに設定されている。 70588) = is set to 121.2678125KHz. 従って、応答機30では論理値“1”を受信する場合も論理値“0”を受信する場合もほぼ同じ強度の信号を受信する事が出来る。 Accordingly, the logical value in response apparatus 30 "1" when receiving even be able to receive a signal having substantially the same intensity when receiving a logical value "0".

【0016】質問機10は、応答機30に対するデータを送信しない期間においては選択回路15を切り替えて、第3の分周回路14の出力121.121212K The interrogator 10, in a period that does not transmit data for the transponder 30 switches the selection circuit 15, the output of the third divider 14 121.121212K
Hzの信号をアンテナコイル17に送り続ける。 The Hz signal continues to send to the antenna coil 17. この周波数はほぼ応答機30の同調回路の同調周波数に等しくなっている。 This frequency is equal to the tuning frequency of approximately tuning circuit transponder 30. 従ってこの期間(受信待ち期間)に応答機30が受け取る電力は質問機10が論理値“1”または“0”のデータを送信している期間(データ送信期間) Therefore this period time power received by the transponder 30 (reception waiting period) the interrogator 10 is transmitting the data having the logic value "1" or "0" (data transmission period)
に比べて大きくなっている。 It is larger compared to the. 従って、質問機10と応答機30の距離が通信限界に近い程遠い場合においても、 Therefore, the distance of interrogator 10 and transponder 30 even if far from close to the communication limit,
応答機30では内部処理回路35内のEEPROMの書き換えや質問機10へのデータ送信と言った電力を多く消費する動作を行う事が出来る。 It is possible to perform many consumption operation power said data transmission to the EEPROM rewriting and interrogator 10 of the transponder 30 within the internal processing circuit 35 in.

【0017】応答機30から質問機10へデータ送信を行う場合には、内部処理回路35の内部のCPUで発生したデータがインタフェース35eを介して変調回路3 [0017] When transmitting data from the responder 30 to interrogator 10, the modulation circuit 3 data generated within the CPU internal processing circuit 35 through the interface 35e
6に伝えられ、変調回路の出力に応じて送信用負荷回路37のトランジスタをオン・オフ動作させる。 Transmitted to 6, to the on-off operation of the transistors of the transmission load circuit 37 in accordance with the output of the modulation circuit. すると送受信コイル31に流れる電流が変化し、送受信コイル3 Then the current flowing through the transmitting and receiving coil 31 is changed, transmission and reception coils 3
1とアンテナコイル17間の電磁結合の強さが変化する。 Electromagnetic coupling strength between 1 and the antenna coil 17 is changed. 質問機10の復調回路20はアンテナコイル17の両端に発生する電圧の変化、具体的には第3の分周回路14から出力される121.121212KHzの信号の振幅変化を検出して応答機30からのデータを復調する。 Demodulation circuit in interrogator 10 20 is the change in voltage generated across the antenna coil 17, specifically, by detecting the amplitude change of the signal 121.121212KHz output from the third divider 14 transponder 30 demodulating the data from. 実際にはバンドパスフィルタで、第3の分周回路1 In fact the band-pass filter, a third frequency divider 1
4から出力される121.121212KHzの信号のサブバンドの振幅変化をとらえて復調動作を行う。 4 captures the amplitude change subbands 121.121212KHz signal output performs demodulation operation.

【0018】以上の様に本発明の実施の形態のデータキャリアシステムでは質問機10と応答機30の距離が通信限界に近い程遠い場合においても、応答機30では内部処理回路35内のEEPROMの書き換えや質問機1 The above distance interrogator 10 and transponder 30 is in a data carrier system according to the embodiment of the present invention as is even when far from close to the communication limit, rewriting of the EEPROM in the internal processing circuit 35 in the transponder 30 and the interrogator 1
0へのデータ送信と言った電力を多く消費する動作を行う事が出来る。 0 data transmission and said power can be done a lot to consumption operation to. 従来では、通信限界付近の応答機30が通信限界内にいるとして応答機30に割り振られたID Conventionally, answering machine 30 in the vicinity of the communication limit is allocated to the answering machine 30 as are within communication limit ID
を返して来るにも関わらず、電力を大量に消費する動作が出来ない為の正しいデータを送り返して来ない時に問題となる。 Despite the coming of the returns, becomes a problem when you do not come to send back the correct data for that can not be an act of high power consuming. 一つの質問機10で複数の応答機30に対応する場合に、一台でもこの様に不安定な応答機30が存在するとこの応答機30に対して何回もデータ送信要求を繰り返すためにシステム全体が止まってしまうと言う現象が起こっていたが、本発明によれば質問機10からのデータを応答機30が受信出来る距離にあれば、応答機30が内部処理をするのに充分な電力が常に得られるので上記の様な問題は発生しない。 System to repeat when the corresponding one of the interrogator 10 to a plurality of transponders 30, the data transmission request times when a single even unstable transponder 30 in this way exists for the transponder 30 whole phenomenon say would stop but was happening, if the distance data can receive the response unit 30 from the interrogator 10 according to the present invention, sufficient power to transponder 30 to the internal processing since There is always obtained not above such a problem occurs.

【0019】尚、上記実施の形態では、質問機10は、 [0019] In the above embodiment, interrogator 10,
応答機30に対するデータを送信しない期間においては選択回路15を切り替えて、第3の分周回路14の出力121.121212KHzの信号をアンテナコイル1 In a period that does not transmit the data to the transponder 30 switches the selection circuit 15, the antenna coil 1 a signal output 121.121212KHz of the third frequency divider 14
7に送り続けるとしたが、応答機30で電力消費の大きな動作をさせる命令を送信した場合だけ第3の分周回路14の出力を送信するようにし、その他の場合には、第1の分周回路12または第2の分周回路13の出力を送信するようにしても良い。 It was to continue feeding to 7, so as to transmit the output of only the third frequency divider 14 when sending a command to the large operating power consumption in the answering machine 30; otherwise, the first minute the output of the divider circuit 12 or the second frequency divider 13 may be transmitted.

【0020】 [0020]

【発明の効果】以上の様に本発明によれば、応答機と質問機の距離が比較的遠い場合にも応答機から質問機への送信に十分な電力を供給出来るデータキャリアシステムおよび質問機を提供することができる。 According to the present invention as described above, according to the present invention, the answering machine and the distance of interrogator even when relatively far away can supply sufficient power to the transmitter from the responder to the interrogator data carrier system and the interrogator it is possible to provide a.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施の形態のデータキャリアシステムを示すブロック図である。 1 is a block diagram illustrating a data carrier system according to the embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

10 質問機 11 発振回路 12 分周回路 13 分周回路 14 分周回路 15 選択回路 17 アンテナコイル 18 同調コンデンサ 19 内部処理回路 20 復調回路 30 応答機 31 送受信コイル 32 同調コンデンサ 33 整流回路 35 内部処理回路 37 送信用負荷回路 10 interrogator 11 oscillator 12 frequency divider 13 frequency divider 14 frequency divider 15 selects the circuit 17 antenna coil 18 tuning capacitor 19 internal processing circuit 20 demodulating circuit 30 transponders 31 transmit and receiver coils 32 tuning capacitor 33 rectifying circuit 35 internal processing circuit 37 transmission load circuit

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 送信コイルと、前記送信コイルに送信データに応じて第1、第2の異なる2つの周波数を有する搬送波を切り替えて供給する送信回路を有する質問機と;送受信コイルとこれに接続された同調コンデンサとで構成される同調回路と、前記送受信コイルで受信した信号を整流する整流回路と、前記整流回路の出力電力で駆動され、前記質問機からの指示に従って信号処理を行って送信信号を前記送受信コイルに供給する信号処理回路とを有する応答機とを備えたデータキャリアシステムにおいて、 前記応答機の前記同調回路の同調周波数は前記第1、第2の周波数の中間の第3の周波数に設定されており、 前記質問機は前記応答機で電力消費の大きな処理を指示する場合にはデータ送信後、前記第3の周波数の搬送波を送信する Connecting a transceiver coil thereto; and 1. A transmission coil, first in accordance with the transmission data to the transmission coil, the interrogator having a transmitter circuit for supplying switching the carrier wave having a second different two frequencies When configured tuning circuit and the tuning capacitor is a rectifier circuit for rectifying the received signal in the transceiver coil is driven by the output power of the rectifier circuit, transmission by performing signal processing according to an instruction from the interrogator in the data carrier system including a transponder and a signal processing circuit for supplying a signal to said transceiver coil, the tuning frequency of the tuning circuit of the transponder is the first, the second frequency third intermediate is set to a frequency, said interrogator after data transmission in the case of instructing the large processing power consumption in the transponder transmits a carrier of the third frequency を特徴とするデータキャリアシステム。 Data carrier system according to claim.
  2. 【請求項2】 送信コイルと、異なる周波数を有する第1、第2の搬送波と前記第1、第2の搬送波の中間の周波数を有する第3の搬送波を発生させる搬送波発生手段と、送信データの論理値に応じて前記第1、第2の2つの周波数の搬送波を切り替えて前記送信コイルに供給するとともに、前記送信データを送信後の所定期間に前記第3の搬送波を前記送信コイルに供給する切換手段を有する事を特徴とするデータキャリアシステム用質問機。 2. A transmission coil, different first having a frequency, said second carrier first, and the carrier wave generating means for generating a third carrier having an intermediate frequency of the second carrier, the transmission data the first according to the logical value, and supplies to supply to the second of the two said transmission coil by switching the carrier frequency, the third carrier wave in a predetermined period after transmitting the transmission data to the transmission coil interrogator data carrier system characterized in that it has a switching means.
  3. 【請求項3】 送信コイルと、前記送信コイルに送信データに応じて第1、第2の異なる2つの周波数を有する搬送波を切り替えて供給する送信回路を有する質問機と;送受信コイルとこれに接続された同調コンデンサとで構成される同調回路と、前記送受信コイルで受信した信号を整流する整流回路と、 前記整流回路の出力電力で駆動され、前記質問機からの指示に従って信号処理を行って送信信号を前記送受信コイルに供給する信号処理回路とを有する応答機とを備えたデータキャリアシステムにおいて、 前記応答機の前記同調回路の同調周波数は前記第1、第2の周波数の中間の第3の周波数に設定されており、 前記質問機は前記応答機へのデータ送信後の所定期間に前記第3の周波数にほぼ等しい周波数の搬送波を送信する事を特徴 Connecting a transceiver coil thereto; 3. A transmission coil, first in accordance with the transmission data to the transmission coil, the interrogator having a transmitter circuit for supplying switching the carrier wave having a second different two frequencies When configured tuning circuit and the tuning capacitor is a rectifier circuit for rectifying the received signal in the transceiver coil is driven by the output power of the rectifier circuit, transmission by performing signal processing according to an instruction from the interrogator in the data carrier system including a transponder and a signal processing circuit for supplying a signal to said transceiver coil, the tuning frequency of the tuning circuit of the transponder is the first, the second frequency third intermediate is set to a frequency, the interrogator characterized in that transmits substantially equal frequency of the carrier in the third frequency in a predetermined period after the data transmission to the transponder とするデータキャリアシステム。 Data carrier system that.
  4. 【請求項4】 請求項1において、前記応答機は電気的に書き換え可能な不揮発性メモリを有し、 前記質問機は少なくとも前記応答機へ前記電気的に書き換え可能な不揮発性メモリへのデータ書き換えを指示した後の所定期間に前記第3の周波数にほぼ等しい周波数の搬送波を送信する事を特徴とするデータキャリアシステム。 4. The method of claim 1, wherein the transponder has an electrically rewritable nonvolatile memory, data rewriting of the interrogator to at least the electrically rewritable nonvolatile memory to the transponder data carrier system, characterized in that transmits a carrier wave of a frequency approximately equal to the third frequency in a predetermined period after instructing the.
  5. 【請求項5】 請求項1において、前記質問機は少なくとも前記応答機へデータ送信を指示した後の所定期間に前記第3の周波数にほぼ等しい周波数の搬送波を送信する事を特徴とするデータキャリアシステム。 5. The method of claim 1, wherein the interrogator data carrier, characterized in that transmits a carrier wave of a frequency approximately equal to the third frequency in a predetermined period after instructing the data transmission to at least the transponder system.
JP9239405A 1997-09-04 1997-09-04 Data carrier system Pending JPH1188241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9239405A JPH1188241A (en) 1997-09-04 1997-09-04 Data carrier system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9239405A JPH1188241A (en) 1997-09-04 1997-09-04 Data carrier system

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Publication Number Publication Date
JPH1188241A true JPH1188241A (en) 1999-03-30

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JP9239405A Pending JPH1188241A (en) 1997-09-04 1997-09-04 Data carrier system

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Country Link
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