JP2021512579A - 近接場充電パッドの無線受電装置及びその他の物体を検出するためのシステム及び方法 - Google Patents
近接場充電パッドの無線受電装置及びその他の物体を検出するためのシステム及び方法 Download PDFInfo
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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Abstract
Description
[0001] 本願の実施形態は一般に、無線電力伝送システムで使用されるアンテナ、ソフトウェア、及びデバイスに関し、より具体的には、シグナチャ信号受信回路を使って無線受電装置及びその他の種類のオブジェクトを検出できる近接場充電パッドに関する。
[0002] 従来の充電パッドは、電磁誘導を利用して機器の充電に使用される磁場を生成する。ユーザはこのような従来の充電パッドで種々の厄介な問題に遭遇しており、そのひとつに、磁気ストリップ及び/又はRFIDチップを含む物体(例えば、クレジットカード、セキュリティバッジ、パスポート、キーフォブその他)がダメージを受けることである。さらに、これらの従来のパッドの多くにおいて、典型的に、充電される機器を充電パッドの特定の位置に置く必要があり、機器はパッド上の別の位置に移動させることができず、移動させると機器の充電が中断又は停止される。これは多くのユーザにとっての煩わしい問題の原因となり、なぜなら、機器をパッド上の、その機器の充電を開始するための正しい位置に正確に位置付けることができないかもしれず、さらには自分が日常的に使用する大切な物体にダメージが及ぶ羽目になるからである。
[0003] したがって、上述の問題に対応する無線充電システム(例えば、無線周波数(RF)充電パッド)が求められている。このために、本明細書には、許可されている無線受電装置がパッド上に置かれているか否か、及び他の何れかの物体(無線受電装置以外のもの)がパッド上に置かれているか否かを検出できるRF充電パッドが記載されている。このようなシステム及びその使用方法は、パッド上の物体の存在を発見して、無線電力の送達を続けるか否か、或いは検出された物体の何れかにダメージを与える可能性を回避するために無線電力の伝送をやめるか否かを判断するのを助ける。パッドは、許可されている無線受電装置を識別し、及び/又はRF充電パッドによる充電又は電源供給が無許可の1つ又は複数の無線受電装置を無視し、それによってシステム全体の電力浸出及びその他の流出を回避しながら、許可されている無線受電装置は常に電力を確実に受けられるようにすることができる。
[0031] 本開示をより詳しく理解できるようにするために、各種の実施形態の特徴を参照しながらより具体的な説明を行うが、その一部を添付の図面に示す。しかしながら、添付の図面は本開示の中の関連のある特徴を示しているにすぎず、したがって、限定とは考えられず、説明はその他の有効な特徴も認めることができる。
[0053] ここで、実施形態について詳しく述べるが、その例が添付の図面に示されている。以下の詳細な説明において、記載されている各種の実施形態を十分に理解するために数多くの具体的な詳細事項が示されている。しかしながら、当業者にとっては、記載されている各種の実施形態は、これらの具体的な詳細事項がなくても実施されかもしれないことがわかるであろう。他の例では、よく知られた方法、手順、コンポーネント、回路、及びネットワークについては、実施形態の態様を不必要に曖昧にしないように詳しく説明していない。
・各種の基本的システムサービスを扱うため、及びハードウェア依存タスクを実行するための手順を含む動作ロジック216
・無線通信コンポーネント204と共にリモートデバイス(例えば、リモートセンサ、送信機、受信機、サーバ、マッピングメモリ等)に結合する、及び/又はそれと通信する通信モジュール218
・例えば、RF充電パッド100に近接する物体の存在、速度、及び/又は位置を特定するために(例えば、センサ212と共に)センサデータを取得し、処理するセンサモジュール220
・ある位置にエネルギーのポケットを形成するためを含むがこれらに限定されない、(例えば、アンテナゾーン290及びその中にそれぞれ含まれるアンテナ210と共に)電力伝送信号を発生し、送信する電力波発生モジュール222。電力波発生モジュール222はまた、個々のアンテナゾーンにより電力伝送信号を送信するために使用される伝送特性(例えば、電力レベル(すなわち、振幅)、位相、周波数等)の値を変更するためにも使用されてよい
・以下を含むがこれらに限定されないデータベース224
〇1つ又は複数のセンサ(例えば、センサ212及び/又は1つ又は複数のリモートセンサ)により受信、検出、及び/又は送信されたデータを保存し、管理するためのセンサ情報226
〇RF充電パッド100及び/又は1つ又は複数のリモートデバイスのための動作設定を保存するためのデバイス設定228
〇1つ又は複数のプロトコル(例えば、カスタム若しくは標準無線プロトコル、例えばZigBee、Z-Wave等、及び/又はカスタム若しくは標準有線プロトコル、例えばイーサネット)のプロトコル情報を保存し、管理するための通信プロトコル情報230、及び
〇マッピングデータ(例えば、1つ又は複数の送信フィールドをマッピングする)を保存し、管理するためのマッピングデータ232
〇様々な無線受電装置及びその他の物体(無線受電装置以外のものに関する、図9Aに関して後でより詳しく説明する既知のシグナチャ信号(図示せず)
・無線受電装置がRF充電パッド100から無線で送達される電力を受ける許可を有するか否かを特定するためのセキュアエレメントモジュール234
・試験電力伝送信号を送信するプロセスを各種のアンテナゾーンと調整して、各種の無線受電装置に無線で電力を送達するためにどのアンテナゾーン(複数の場合もある)を使用すべきかを特定するためのアンテナゾーン選択及び調整モジュール237(参照によって本願に援用されるPCT特許出願第PCT/US17/65886号の図9A〜9Bに関して後でより詳しく説明する)
・無線受電装置から、及びその他の物体から各種のシグナチャ信号を検出し、その後、各種のシグナチャ信号の検出に基づいて適切な行為を特定するため(図9A〜9Bに関して後でより詳しく説明する)に使用される許可を受けた受電器及び物体検出モジュール238
・検出されたシグナチャ信号を復号し、メッセージ又はデータの内容を特定するために使用されるシグナチャ信号復号モジュール
・各種の基本的システムサービスを扱うため、及びハードウェア依存タスクを実行するための手順を含む動作ロジック266
・無線通信コンポーネント254と共にリモートデバイス(例えば、リモートセンサ、送信機、受信機、サーバ、マッピングメモリ等)に結合する、及び/又はそれと通信する通信モジュール268
・例えば、受電器103、RF充電パッド100、又は受電器103に近接する物体の存在、速度、及び/又は位置を特定するために(例えば、センサ262と共に)センサデータを取得し、処理するセンサモジュール270
・(例えば、アンテナ260及び/又はパワーハーベスティング回路259と共に)エネルギー、容量伝達された電気信号、電力波、及び/又はエネルギーポケットを受け取り、任意選択により、(例えば、パワーハーベスティング回路259と共に)エネルギーを(例えば、直流に)変換し、エネルギーを結合された電子機器に供給し、任意選択により、(例えば、エネルギー貯蓄装置261と共に)エネルギーを貯蓄する無線受電モジュール272
・以下を含むがこれらに限定されないデータベース274
〇1つ又は複数のセンサ(例えば、センサ262及び/又は1つ又は複数のリモートセンサ)により受信、検出、及び/又は送信されたデータを保存し、管理するためのセンサ情報276
〇受電器103、結合された電子機器、及び/又は1つ又は複数のリモートデバイスのための動作設定を保存するためのデバイス設定278
〇1つ又は複数のプロトコル(例えば、カスタム若しくは標準無線プロトコル、例えばZigBee、Z-Wave等、及び/又はカスタム若しくは標準有線プロトコル、例えばイーサネット)を保存し、管理するための通信プロトコル情報280、及び
・RF充電パッド100に識別情報を提供するためのセキュアエレメントモジュール282(例えば、RF充電パッド100は、識別情報を使って、無線受電装置104が無線で送達される電力を受け取る許可を有するか否かを特定する)、及び、
・(シグナチャ信号発生回路315と共に)各種のコンポーネントを制御して、アンテナ260及び/又はパワーハーベスティング回路259におけるインピーダンスを変化させ、その後、シグナチャ信号受信回路240により受け取られた反射電力を変化させるために使用されるシグナチャ信号発生モジュール283
Claims (22)
- 近接場充電パッドの動作方法において、
1つ又は複数のプロセッサと、各々がそれぞれ少なくとも1つの給電素子及びシグナチャ信号受信回路を含む複数の給電ゾーンと、を含む近接場充電パッドにおいて、
前記複数の給電ゾーンのうちの第一の給電ゾーンに含まれるそれぞれの給電素子によって、第一の伝送特性群に関する第一の値を有する複数の試験電力伝送信号を送信することと、
前記複数の試験電力伝送信号の各々を送信することと共に、前記シグナチャ信号受信回路を使って、前記第一の給電ゾーンでの反射電力のそれぞれの量を検出することと、
少なくとも一部に前記反射電力のそれぞれの量に基づいて、(i)許可されている無線受電装置及び/又は(ii)無線受電装置以外の物体が、前記近接場充電パッドの、前記第一の給電ゾーンに隣接する表面上に存在するか否かを特定することと、
を含む方法。 - 前記第一の給電ゾーンにおける前記反射電力のそれぞれの量を前記検出することは、前記シグナチャ信号受信回路を使って、少なくとも一部に前記第一の給電ゾーンにおける前記反射電力のそれぞれの量に基づく1つ又は複数のシグナチャ信号を特定することを含み、
前記1つ又は複数のシグナチャ信号と1つ又は複数の所定のシグナチャ信号との比較に基づいて、許可されている無線受電装置が前記近接場充電パッドの、前記第一のアンテナゾーンに隣接する前記表面上に存在することを特定することであって、前記許可されている無線受電装置は、前記複数の試験電力伝送信号から取得した電力を使って前記1つ又は複数のシグナチャ信号を発生するシグナチャ信号発生回路を含む、特定することと、
前記許可されている無線受電装置が前記表面上に存在することを前記特定することにしたがって、前記第一のアンテナゾーンに含まれる前記それぞれの給電素子によって、前記第一の伝送特性群に関する第二の値を有する追加の電力伝送信号を送信することと、
をさらに含む、請求項1の方法。 - 前記許可されている無線受電装置が前記表面上に存在することを前記特定することはまた、前記1つ又は複数のシグナチャ信号と前記1つ又は複数の所定のシグナチャ信号との比較に基づいて、無線受電装置以外の物体が前記許可されている無線受電装置と前記表面との間に存在することを特定することも含み、
前記近接場充電パッドが、無線受電装置以外の物体が前記近接場充電パッド上に存在するときに電力伝送信号を送信するように構成されていることを特定することと、
前記近接場充電パッドが、無線受電装置以外の物体が前記近接場充電パッド上に存在するときに電力伝送信号を送信するように構成されていることを特定された後に、前記追加の電力伝送信号を送信することと、
をさらに含む、請求項2の方法。 - 前記1つ又は複数のシグナチャ信号は、前記第一の給電ゾーンの前記シグナチャ信号受信回路に、前記無線受電装置のインピーダンス値に対する操作を利用して1つ又は複数のシグナチャ信号を符号化することによって伝達され、前記インピーダンス値への前記操作は、前記反射電力の量を異なる時点で変化させる、請求項2の方法。
- 前記近接場充電パッドはデータ通信ラジオを含み、
前記複数の試験電力伝送信号を前記送信することは、前記データ通信ラジオを介して何れの信号も受信せずに実行される、
請求項1〜4の何れかの方法。 - 前記複数の試験電力伝送信号を前記送信することは、所定の期間が満了したときに行われる、請求項1〜5の何れかの方法。
- 前記複数の試験電力伝送信号を前記送信することと共に、前記複数の給電ゾーンのうちの各給電ゾーンに含まれるそれぞれの給電素子によってそれぞれの複数の試験電力伝送信号を送信することと、
前記複数の給電ゾーンのうちの各それぞれの給電ゾーンに含まれるそれぞれのシグナチャ信号受信回路を使って、前記複数の給電ゾーンの各々における反射電力のそれぞれの量を検出することと、
前記複数の給電ゾーンのうちの各給電ゾーンについて、(a)無線受電装置及び/又は(ii)無線受電装置以外のオブジェクトが、前記複数の給電ゾーンのうちの各々に隣接するそれぞれの表面に存在することを特定するステップと、
をさらに含む、請求項1〜6の何れかの方法。 - 前記複数の給電ゾーンのうちの第二の給電ゾーンで検出された前記反射電力のそれぞれの量に基づいて、無線受電装置以外の物体が前記第二の給電ゾーンに存在することを特定することと、
無線受電装置以外の前記物体が前記第二の給電ゾーンに存在することを特定することと共に、前記近接場充電パッドが、1つ又は複数の物体が前記近接場充電パッド上に存在しているときに無線電力を送信するように構成されているか否かを特定するステップと、
をさらに含み、
前記追加の電力伝送信号を前記送信することは、前記近接場充電パッドが、1つ又は複数の物体が前記近接場充電パッド上に存在するときに無線電力を送信するように構成されることを特定した後でのみ実行される、
請求項1〜7の何れかの方法。 - 前記近接場充電パッドの前記1つ又は複数のプロセッサは、前記1つ又は複数の所定のシグナチャ信号を含むデータソースと通信する、請求項1〜8の何れかの方法。
- 前記データソースには、複数の異なる無線受電装置の各々が前記近接場充電パッドの上に置かれて、前記近接場充電パッドが前記複数の異なる無線受電装置の各々のためのそれぞれの所定のシグナチャ信号を検出し、その後保存できるようにする構成プロセス中に、1つ又は複数の所定のシグナチャ信号が入力される、請求項1〜9の何れかの方法。
- 前記構成プロセスは、無線受電装置以外の複数の異なる物体を前記近接場充電パッド上に置いて、前記近接場充電パッドが前記複数の異なる物体の各々のためのそれぞれの所定のシグナチャ信号を検出し、保存できるようにすることをさらに含む、請求項1〜10の何れかの方法。
- 前記追加の電力伝送信号を送信した後、前記無線受電装置からデータ通信信号を受信することであって、前記データ通信信号は、前記近接場充電パッドが前記第一の伝送特性群のための機器ごとの値を特定することができるようにする情報を含む、受信することと、
前記データ通信信号を受信したことに応答して、前記追加の電力伝送信号の送信を停止し、その代わりに、前記第一の給電ゾーンに含まれるそれぞれの給電素子を介して、前記第一の伝送特性群のための前記機器ごとの値を有する別の電力伝送信号を送信することと、
をさらに含む、請求項1〜11の何れかの方法。 - 前記第一の伝送特性群のための前記第一及び第二の値は同じである、請求項1〜12の何れかの方法。
- 前記第一の伝送特性群のための前記第一及び第二の値は異なる、請求項1〜12の何れかの方法。
- 前記無線受電装置は、受電素子と、前記受電素子に結合され、電力伝送信号の受信によって発生される交流電流を直流電流に変換する整流器と、を含み、前記無線受電装置の前記信号発生回路は、
前記整流器の直流電流出力ポートに設置されたインピーダンス変調回路を含み、前記インピーダンス変調回路は、前記無線受電装置におけるインピーダンスを変調するように構成される、
請求項1〜14の何れかの方法。 - 前記給電素子は近接場容量性カプラであり、
前記近接場容量性カプラは、一次カプラを有する金属層と、前記金属層の上の前記一次カプラに隣接する1つ又は複数の寄生結合素子を含む、
請求項1〜15の何れかの方法。 - 前記近接場容量性カプラは、送信線を介してパワーアンプに結合され、前記送信線は、前記複数の試験電力伝送信号及び前記追加の電力伝送信号を前記近接場容量性カプラに供給するように構成される、請求項1〜16の何れかの方法。
- 前記送信線は前記シグナチャ信号受信回路に結合される、請求項1〜17の何れかの方法。
- 各々がそれぞれ少なくとも1つの給電素子とシグナチャ信号受信回路を含む複数の給電ゾーンと、1つ又は複数のプロセッサと、を有する近接場充電パッドにより実行されると、前記近接場充電パッドに、
前記複数の給電ゾーンのうちの第一の給電ゾーンに含まれるそれぞれの給電素子をよって、第一の伝送特性群のための第一の値を有する複数の試験電力伝送信号を送信させ、
前記複数の試験電力伝送信号の各々の送信と共に、前記シグナチャ信号受信回路を使用して、前記第一の給電ゾーンにおける反射電力のそれぞれの量を検出させ、
少なくとも一部に前記反射電力のそれぞれの量に基づいて、(i)許可されている無線受電装置及び/又は(ii)無線受電装置以外の物体が、前記近接場充電パッドの、前記第一の給電ゾーンに隣接する表面上に存在するか否かを特定させる
実行可能命令を保存する非一時的コンピュータ可読記憶媒体。 - 前記1つ又は複数のプログラムは、請求項2〜18の何れかの方法を実行するための命令をさらに含む、請求項19の非一時的コンピュータ可読記憶媒体。
- 近接場充電パッドにおいて、
無線通信コンポーネントと、
各々がそれぞれ少なくとも1つの給電素子を含む複数の給電ゾーンと、
1つ又は複数のプロセッサと、
前記1つ又は複数のプロセッサにより実行されるように構成された1つ又は複数のプログラムを保存するメモリであって、前記1つ又は複数のプログラムは、
前記複数の給電ゾーンのうちの第一の給電ゾーンに含まれるそれぞれの給電素子によって、第一の伝送特性群のための第一の値を有する複数の試験電力伝送信号を送信し、
前記複数の試験電力伝送信号の各々の送信と共に、前記シグナチャ信号受信回路を使用して、前記第一の給電ゾーンにおける反射電力のそれぞれの量を検出し、
少なくとも一部に前記反射電力のそれぞれの量に基づいて、(i)許可されている無線受電装置及び/又は(ii)無線受電装置以外の物体が、前記近接場充電パッドの、前記第一の給電ゾーンに隣接する表面上に存在するか否かを特定する
ための命令を含むメモリと、
を含む近接場充電パッド。 - 前記1つ又は複数のプログラムは、前記1つ又は複数のプロセッサにより実行されると、さらに前記近接場充電パッドに請求項2〜18の何れかの方法を実行させる、請求項21の近接場充電パッド。
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