JP6745241B2 - チップレス無線周波数識別(rfid)アーキテクチャに基づく化学センサ - Google Patents
チップレス無線周波数識別(rfid)アーキテクチャに基づく化学センサ Download PDFInfo
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Description
Claims (18)
- 無線周波数識別(RFID)デバイスであって:
受信アンテナ;
送信アンテナ;
複数の共振器を含む多重共振器であって、前記多重共振器は、前記受信アンテナと前記送信アンテナとの間で電気的に接続される共振器;ならびに
前記RFIDデバイスの2つ以上の電気伝導性構造をつなぐセンサ材料であって、前記センサ材料は、前記センサ材料が曝露される環境条件に依存して変化するように構成された変動電気伝導率を有するセンサ材料
を含み、
前記多重共振器の共振振幅は、前記センサ材料の第1の電気伝導率に依存する第1の量により減衰して、第1の応答を提供し、前記RFIDセンサから第1の振幅を有する第1の応答を出力するように構成され、前記第1の振幅は、環境条件の第1の状態に依存し、
前記多重共振器の共振振幅は、前記センサ材料の第2の電気伝導率に依存する第2の量により減衰して、第2の応答を提供し、前記RFIDセンサから第2の振幅を有する第2の応答を出力するように構成され、前記第2の振幅は、環境条件の第2の状態に依存する、無線周波数識別(RFID)デバイス。 - 前記多重共振器の第1のアーム;および
間隙空間によって前記第1のアームから間隔をあけた前記多重共振器の第2のアームをさらに含む、請求項1に記載のRFIDデバイスであって、
前記センサ材料が、間隙空間内に位置付けられ、前記第1のアームと前記第2のアームとの間の間隙空間の幅をつなぐ、RFIDデバイス。 - 前記センサ材料が、ポリビニルアルコール、充填ポリビニルアルコール複合体、ポリアクリル酸、半導体フィルム、スパッタリングされた半導体フィルム、蒸着半導体フィルム、ポリピロール、ポリアニリン、ポリエチレンアミン、ポリ(エチレン−co−アクリル酸)、ポリ(ビニルアルコール)−ポリピロール−塩化鉄(PVA−PPy−FeCl3)複合体フィルム、多層カーボンナノチューブ(MWCNT)/ポリ(フッ化ビニリデン)(PVDF)、ポリカプロラクタム、ナイロン−6,6、ポリオキシメチレン、高密度ポリエチレン、およびこれら2つ以上の組み合わせの少なくとも1つを含む、請求項2に記載のRFIDデバイス。
- 前記センサ材料がポリビニルアルコールを含み、前記RFIDデバイスがさらに、相対湿度をモニターまたは測定するように構成される、請求項2に記載のRFIDデバイス。
- 前記センサ材料はポリアクリル酸を含み、前記RFIDデバイスがさらにpH1〜12をもたらす水素イオン濃度をモニターまたは測定するように構成される、請求項2に記載のRFIDデバイス。
- 前記センサ材料はポリピロールを含み、前記RFIDデバイスがさらに温度をモニターまたは測定するように構成される、請求項2に記載のRFIDデバイス。
- 無線周波数識別(RFID)システムであって:
RFIDリーダ;および
前記RFIDリーダからの質問を受信し、前記質問の受信時にRFIDリーダに対する応答をアウトプットするように構成されたRFIDセンサデバイスであって、前記RFIDセンサデバイスが、
受信アンテナ;
送信アンテナ;
複数の共振器を含む多重共振器であって、前記受信アンテナと前記送信アンテナとの間で電気的に接続される多重共振器;および
前記RFIDデバイスの2つ以上の電気伝導性構造をつなぐセンサ材料であって、前記センサ材料が曝露される環境条件に依存して変化するように構成された変動電気伝導率を有するセンサ材料、
を含み、
前記多重共振器の共振振幅は、前記センサ材料の第1の電気伝導率に依存する第1の量により減衰して、第1の応答を提供し、前記RFIDセンサから第1の振幅を有する第1の応答を出力するように構成され、前記第1の振幅は、環境条件の第1の状態に依存し、
前記多重共振器の共振振幅は、前記センサ材料の第2の電気伝導率に依存する第2の量により減衰して、第2の応答を提供し、前記RFIDセンサから第2の振幅を有する第2の応答を出力するように構成され、前記第2の振幅は、環境条件の第2の状態に依存するRFIDセンサデバイス
を含む無線周波数識別(RFID)システム。 - 前記RFIDリーダを含むRFIDコントローラをさらに含み、前記RFIDリーダによって受信された応答の振幅に応答するデータを記憶するように構成されたメモリをさらに含む、請求項7に記載のRFIDシステム。
- 前記多重共振器の第1のアーム;および
間隙空間によって前記第1のアームから間隔をあけた多重共振器の第2のアームをさらに含む、請求項8に記載のRFIDシステムであって、
前記センサ材料が、前記間隙空間内に位置付けられ、前記第1のアームと前記第2のアームとの間の間隙空間の幅をつなぐ、RFIDシステム。 - 前記センサ材料はポリビニルアルコール、ポリアクリル酸、満ポリアクリル酸コンポジット、ポリアリレン、満ポリアリレンコンポジットのうちの少なくとも1つを含む、請求項9に記載のRFIDシステム。
- 前記センサ材料はポリビニルアルコールを含み、前記RFIDデバイスがさらに、相対湿度をモニターまたは測定するように構成される、請求項9に記載のRFIDデバイス。
- 前記センサ材料はポリアクリル酸を含み、前記RFIDデバイスがさらに水素イオン濃度をモニターまたは測定するように構成される、請求項9に記載のRFIDデバイス。
- 前記センサ材料はポリピロールを含み、前記RFIDデバイスがさらに温度をモニターまたは測定するように構成される、請求項2に記載のRFIDデバイス。
- 環境条件をセンシングする方法であって:
RFIDセンサを用いる無線周波数識別(RFID)リーダからの第1の質問を受信する工程であって、前記RFIDセンサが:
受信アンテナ;
送信アンテナ;
複数の共振器を含む多重共振器であって、前記多重共振器の第1のアーム、および間隙空間によって前記第1のアームから間隔をあけた多重共振器の第2のアームを含み、前記受信アンテナと前記送信アンテナとの間で電気的に接続される多重共振器;および
間隙空間内で、前記第1のアームと前記第2のアームとの間の前記間隙空間の幅をつなぐセンサ材料であって、前記センサ材料が曝される環境条件に依存して変化するように構成される変動電気伝導率を有するセンサ材料を含む、工程;
前記センサ材料の第1の電気伝導率に依存する第1の量によって前記多重共振器の共振振幅を減衰し、第1の応答を提供する工程;
前記RFIDセンサからの第1の振幅を有する第1の応答をアウトプットする工程であって、前記第1の振幅は前記環境条件の第1の状態に依存する工程;
前記RFIDセンサを用いて前記RFIDリーダからの第2の質問を受信する工程;
前記センサ材料の第2の電気伝導率に依存する第2の量によって前記多重共振器の共振振幅を減衰し、第2の応答を提供する工程であって、前記第1の量は前記第2の量と異なる、工程;
前記RFIDセンサから第2の振幅を有する第2の応答をアウトプットする工程であって、前記第2の振幅が第1の振幅とは異なり、前記環境条件の第2の状態に依存する工程
を含む、方法。 - 前記センサ材料が、ポリビニルアルコール、充填ポリビニルアルコール複合体、ポリアクリル酸、半導体フィルム、スパッタリングされた半導体フィルム、蒸着半導体フィルム、ポリピロール、ポリアニリン、ポリエチレンアミン、ポリ(エチレン−co−アクリル酸)、ポリ(ビニルアルコール)−ポリピロール−塩化鉄(PVA−PPy−FeCl3)複合体フィルム、多層カーボンナノチューブ(MWCNT)/ポリ(フッ化ビニリデン)(PVDF)、ポリカプロラクタム、ナイロン−6,6、ポリオキシメチレン、高密度ポリエチレン、およびこれら2つ以上の組み合わせの少なくとも1つを含み、前記方法が、相対湿度、水素イオン濃度および温度の少なくとも1つをモニターするまたは測定する工程を含む、請求項14に記載の方法。
- 前記センサ材料はポリビニルアルコールを含み、前記方法は、相対湿度をモニターまたは測定することを含む、請求項14に記載の方法。
- 前記センサ材料はポリビニルアルコールを含み、前記方法はさらに水素イオン濃度をモニターまたは測定することを含む、請求項14に記載の方法。
- 前記センサ材料はポリアクリル酸を含み、前記方法はさらに相対湿度をモニターまたは測定することを含む、請求項14に記載の方法。
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