JP6662855B2 - パッシブrfidセンサ・タグ及びrfidリーダ - Google Patents
パッシブrfidセンサ・タグ及びrfidリーダ Download PDFInfo
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Description
Radio Frequency IDentification、無線自動識別)センサ、RFIDセンサ・システム、及びパッシブRFIDセンサ・タグ用のRFIDリーダに関する。
発振器の発振周波数が感知素子によって感知される量の値に依存するように感知素子によって負荷される発振器を有するパッシブRFIDセンサ・タグに無線周波数質問信号を送信するステップと、
感知量の値に依存する発振周波数で変調される後方散乱無線周波信号をパッシブRFIDタグから受信するステップと、
パッシブRFIDタグを識別するステップと、
識別されたパッシブRFIDセンサ・タグの所定のセンサ構成情報であり、識別されたパッシブRFIDセンサ・タグで利用可能な1つ以上のセンサ素子に関する情報と、特に各利用可能なセンサ素子に対する、どのように後方散乱信号の発振周波数をそれぞれの感知素子によって感知された量の実測値に変換するべきかという情報とを含むセンサ構成情報に基づいて、後方散乱信号の発振周波数を感知量の実測値に変換するステップとを含む方法である。
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表(inventory)を作成するステップと、
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
新たなパッシブRFIDセンサ・タグのメモリにアクセスして、RFID読取り動作でパッシブRFIDセンサ・タグのセンサ構成情報を読み取るステップと、
新たなRFIDセンサ・タグの読み取られたセンサ構成情報を少なくとも一時的にRFIDリーダに且つ任意選択で少なくとも1つのネットワーク要素に記憶するステップとを含む。
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
少なくとも1つのネットワーク要素に新たな識別されたパッシブRFIDセンサ・タグのセンサ構成情報を問い合わせるステップと、
新たなRFIDセンサ・タグの問い合わせられたセンサ構成情報を少なくとも一時的にリーダに記憶するステップとを含む。
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
少なくとも1つのネットワーク要素に新たな識別されたパッシブRFIDセンサ・タグのセンサ構成情報を問い合わせようとまず試みるステップと、
新たな識別されたパッシブRFIDセンサ・タグのセンサ構成情報がシステムにおける少なくとも1つのネットワーク要素で入手可能でなければ、パッシブRFIDセンサ・タグのメモリにアクセスして、RFID読取り動作でパッシブRFIDセンサ・タグのセンサ構成情報を読み取るステップと、
新たなRFIDセンサ・タグの問い合わせられた又は読み取られたセンサ構成情報を少なくとも一時的にリーダに記憶し、且つ任意選択で新たなRFIDセンサ・タグの読み取られたセンサ構成情報を少なくとも1つのネットワーク要素に送信するステップとを含む。
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
パッシブRFIDセンサ・タグのメモリにアクセスして、RFID読取り動作でパッシブRFIDセンサ・タグのセンサ構成情報の第1の部分を読み取るステップと、
第1の情報の部分に基づいてパッシブRFIDセンサ・タグのセンサ構成情報の第2の部分を得るステップとを含む。
Claims (17)
- RFIDリーダと、デジタル応答を搬送する変調後方散乱信号が、変調信号によって質問周波数からオフセットされる側波帯を備える、後方散乱原理での通信のための少なくとも1つのパッシブRFIDセンサ・タグとを有するシステムにおいてセンサ値を質問するための方法であって、前記システムの前記RFIDリーダ側で、
発振器から出力される変調周波数が感知素子によって感知される量の値に依存するように前記感知素子によって負荷される前記発振器を有する前記パッシブRFIDセンサ・タグに無線周波数質問信号を送信するステップと、
前記変調周波数で変調される後方散乱無線周波信号を前記パッシブRFIDタグから受信するステップであり、前記デジタル応答を搬送する前記変調後方散乱信号の前記側波帯の前記オフセットが、前記感知量の前記値に依存し且つそれを搬送するように配置されるステップと、
前記パッシブRFIDタグを識別するステップと、
前記識別されたパッシブRFIDセンサ・タグの所定のセンサ構成情報であり、前記識別されたパッシブRFIDセンサ・タグで利用可能な1つ以上のセンサ素子に関する情報と、各利用可能なセンサ素子に対する、どのように前記後方散乱信号の前記変調周波数を前記それぞれの感知素子によって感知された前記量の実測値に変換するべきかという情報とを含むセンサ構成情報に基づいて、前記後方散乱信号の前記変調周波数を前記感知量の実測値に変換するステップとを含み、
どのように前記後方散乱信号の前記変調周波数を前記感知量の実測値に変換するべきかという前記情報が、値範囲、値のスケーリング、測定の単位、較正情報、温度補償情報のうちの1つ又は複数を含む、方法。 - 前記センサ構成情報を前記パッシブRFIDセンサ・タグの不揮発性メモリに記憶するステップを含む、請求項1に記載の方法。
- 前記RFIDリーダによって以前に識別された前記パッシブRFIDタグに対して、前記センサ構成情報を少なくとも一時的に前記RFIDリーダに記憶するステップを含む、請求項1に記載の方法。
- 前記システムの前記RFIDリーダ側で、
前記RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
前記RFIDリーダの前記読取り範囲内の前記パッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
新たなパッシブRFIDセンサ・タグのメモリにアクセスして、RFID読取り動作で前記パッシブRFIDセンサ・タグの前記センサ構成情報を読み取るステップと、
前記新たなRFIDセンサ・タグの前記読み取られたセンサ構成情報を少なくとも一時的に前記RFIDリーダに且つ任意選択で少なくとも1つのネットワーク要素に記憶するステップとを含む、請求項3に記載の方法。 - 複数のRFIDセンサ・タグの前記センサ構成情報を、前記RFIDセンサ・タグでの前記情報の永久記憶に加えて又はその代わりに、少なくとも一時的に少なくとも1つのネットワーク要素に維持するステップを含む、請求項1に記載の方法。
- 前記少なくとも1つのネットワーク要素が、前記リーダに接続されるローカル・ホスト、複数のローカル・リーダと通信しているローカル・サーバ、又は複数のリーダと通信しているリモート・サーバの1つ又は複数を備える、請求項5に記載の方法。
- 前記システムの前記RFIDリーダ側で、
前記RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
前記RFIDリーダの前記読取り範囲内の前記パッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
前記少なくとも1つのネットワーク要素に新たな識別されたパッシブRFIDセンサ・タグの前記センサ構成情報を問い合わせるステップと、
前記新たなRFIDセンサ・タグの前記問い合わせられたセンサ構成情報を少なくとも一時的に前記リーダに記憶するステップとを含む、請求項5に記載の方法。 - 前記システムの前記RFIDリーダ側で、
前記RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
前記RFIDリーダの前記読取り範囲内の前記パッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
前記少なくとも1つのネットワーク要素に新たな識別されたパッシブRFIDセンサ・タグの前記センサ構成情報を問い合わせようとまず試みるステップと、
前記新たな識別されたパッシブRFIDセンサ・タグの前記センサ構成情報が前記システムにおける前記少なくとも1つのネットワーク要素で入手可能でなければ、パッシブRFIDセンサ・タグのメモリにアクセスして、RFID読取り動作で前記パッシブRFIDセンサ・タグの前記センサ構成情報を読み取るステップと、
前記新たなRFIDセンサ・タグの前記問い合わせられた又は読み取られたセンサ構成情報を少なくとも一時的に前記リーダに記憶し、且つ任意選択で前記新たなRFIDセンサ・タグの前記読み取られたセンサ構成情報を前記少なくとも1つのネットワーク要素に送信するステップとを含む、請求項5に記載の方法。 - 前記システムの前記RFIDリーダ側で、
前記RFIDリーダの読取り範囲内のパッシブRFIDセンサ・タグの一覧表を作成するステップと、
前記RFIDリーダの前記読取り範囲内の前記パッシブRFIDセンサ・タグのセッション識別情報を受信するステップと、
パッシブRFIDセンサ・タグの前記メモリにアクセスして、RFID読取り動作で前記パッシブRFIDセンサ・タグの前記センサ構成情報の第1の部分を読み取るステップと、
情報の前記第1の部分に基づいて前記パッシブRFIDセンサ・タグの前記センサ構成情報の第2の部分を得るステップとを含む、請求項2に記載の方法。 - 前記パッシブRFIDセンサ・タグの前記センサ構成情報が、前記パッシブRFIDセンサ・タグの一意の識別子と関連づけられている、請求項1に記載の方法。
- 前記センサ構成情報が、デフォルトのセンサ素子に関する情報、センサ素子を選択的に作動させるための情報、前記パッシブRFIDセンサ・タグにおけるセンサ選択器に対するセンサ作動コマンドパラメータ、センサ素子を選択的に作動させるためのRFIDコマンドに使用されることになっている所定のビット若しくはビット・パターン、のうちの1つ又は複数を更に備える、請求項1に記載の方法。
- 温度補償情報が、前記発振器が前記それぞれの感知素子によって負荷されるときに前記後方散乱信号の前記変調周波数から温度変動の影響を相殺する、各センサ素子に対する発振周波数温度補償情報を備える、請求項1に記載の方法。
- 前記少なくとも1つのパッシブRFIDセンサ・タグが所定の判定基準に従って前記感知量の前記値を前処理し、且つ前記センサ構成情報が、所定の限界値又は前記感知量の状態の変化に関する情報を含む前記所定の判定基準を備える、請求項1に記載の方法。
- 請求項1から13のいずれか一項に記載の方法を実装するRFIDリーダ。
- RFIDリーダ装置と前記RFIDリーダ装置を制御するように接続されるリモート又はローカル・コンピューティング装置とを備える機器である、請求項14に記載のRFIDリーダ。
- 請求項1から13のいずれか一項に記載の方法に従って前記センサ構成情報の少なくとも一部分を永久的に記憶するための手段を備えるパッシブRFIDセンサ・タグ。
- 請求項1から13のいずれか一項に記載の方法に従って前記センサ構成情報の最少の一部を永久的に又は一時的に記憶するための手段を備えるネットワーク要素システム。
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