JP2015154159A - Communication system, communication device, control method therefor and program - Google Patents

Communication system, communication device, control method therefor and program Download PDF

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JP2015154159A
JP2015154159A JP2014024729A JP2014024729A JP2015154159A JP 2015154159 A JP2015154159 A JP 2015154159A JP 2014024729 A JP2014024729 A JP 2014024729A JP 2014024729 A JP2014024729 A JP 2014024729A JP 2015154159 A JP2015154159 A JP 2015154159A
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power
power transmission
side device
communication
communication system
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長嶺　一秀
Kazuhide Nagamine
一秀 長嶺
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Canon Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a technique for continuous communication even influenced by a foreign substance etc.SOLUTION: A communication system, having power transmission side equipment and power reception side equipment, includes: a detection unit for detecting a change of a power transmission environment between the power transmission side equipment and the power reception side equipment; a control unit for controlling a power transmission output value on the basis of the change of the power transmission environment detected by the detection unit; and a transmission unit for transmitting a data between the power transmission side equipment and the power reception side equipment, using the power transmission output value controlled by the control unit.

Description

本発明は、通信システム、通信装置、それらの制御方法およびプログラムに関する。   The present invention relates to a communication system, a communication apparatus, a control method thereof, and a program.

近年、スマートフォン等の携帯デバイスに近接無線通信のNFC（Near Field Communication）が内蔵されてきている。また、NFCを内蔵した携帯デバイス等の機器に対して無線電力伝送技術を用いて非接触で充電するシステムが知られている。   In recent years, NFC (Near Field Communication) for close proximity wireless communication has been built in portable devices such as smartphones. There is also known a system for charging a device such as a portable device with a built-in NFC in a contactless manner using a wireless power transmission technology.

特許文献1では、送電装置と受電装置とのに異物が混入された場合に送電を停止することが開示されている。特許文献2では、冷蔵庫の本体（送電側）と扉（受電側）間の無線電力伝送において、送電側と受電側の間に異物が検出されると送電を停止すると共に、扉の開閉状態の検出部を本体に設け、扉の開閉状態によって異物を取り除くような通知を本体側で行なうことが開示されている。特許文献3では、充電期間中に送電側において受電側からの受電確認信号を所定時間内に受信できない時は送電を停止することが開示されている。また特許文献4では、受電側で電力を多く受けられるように送電側でインピーダンスを調整することが開示されている。   Patent Document 1 discloses that power transmission is stopped when a foreign object is mixed between the power transmission device and the power reception device. In Patent Document 2, in the wireless power transmission between the refrigerator main body (power transmission side) and the door (power reception side), when a foreign object is detected between the power transmission side and the power reception side, power transmission is stopped and the door is opened and closed. It is disclosed that a detection unit is provided in the main body, and a notification is made on the main body side to remove foreign matter depending on the open / closed state of the door. Patent Document 3 discloses that power transmission is stopped when a power reception confirmation signal from the power reception side cannot be received within a predetermined time during the charging period. Patent Document 4 discloses that the impedance is adjusted on the power transmission side so that a large amount of power can be received on the power reception side.

特開2003-131771号公報JP2003-131771 特開2001-128391号公報Japanese Patent Laid-Open No. 2001-128391 特開2003-347965号公報JP 2003-347965 A 特開2002-078247号公報JP 2002-078247 A

しかしながら、特許文献1乃至特許文献4に記載の技術では、送電側機器と受電側機器の間に異物があることが検出された場合、送電が完全に停止されている。送電を完全に停止してしまうとNFC通信が一切行えなくなり、異物が除去されるまではNFC通信を再開することができない。また、無線通信環境の面においても、異物の影響によりNFC通信が正常に行えなくなってしまう。   However, in the techniques described in Patent Literature 1 to Patent Literature 4, when it is detected that there is a foreign object between the power transmission side device and the power reception side device, power transmission is completely stopped. If power transmission is completely stopped, NFC communication cannot be performed at all, and NFC communication cannot be resumed until foreign matter is removed. Also, in terms of the wireless communication environment, NFC communication cannot be normally performed due to the influence of foreign matter.

上記の課題に鑑み、本発明は、異物等の影響があっても継続的に通信を行なう技術を提供することを目的とする。   In view of the above problems, an object of the present invention is to provide a technique for continuously communicating even if there is an influence of a foreign object or the like.

上記の目的を達成する本発明に係る通信システムは、
送電側機器と受電側機器とを備える通信システムであって、
前記送電側機器と前記受電側機器との間での送電環境の変化を検出する検出手段と、
前記検出手段により検出された前記送電環境の変化に基づいて送電出力値を制御する制御手段と、
前記制御手段により制御された前記送電出力値で、前記送電側機器と前記受電側機器との間でデータを伝送する伝送手段と、
を備えることを特徴とする。 A communication system according to the present invention that achieves the above object is as follows.
A communication system comprising a power transmission side device and a power reception side device,
Detecting means for detecting a change in power transmission environment between the power transmission side device and the power reception side device;
Control means for controlling a power transmission output value based on a change in the power transmission environment detected by the detection means;
Transmission means for transmitting data between the power transmission side device and the power reception side device at the power transmission output value controlled by the control means,
It is characterized by providing.

本発明によれば、異物等の影響があっても継続的に通信を行なうことができる。   According to the present invention, continuous communication can be performed even if there is an influence of foreign matter or the like.

本発明の一実施形態に係る通信システムの構成例を示す図。The figure which shows the structural example of the communication system which concerns on one Embodiment of this invention. 本発明の一実施形態に係る通信システムの動作説明図。FIG. 3 is an operation explanatory diagram of a communication system according to an embodiment of the present invention. 本発明の第1実施形態に係る送電側機器（通信装置）のブロック構成図。1 is a block configuration diagram of a power transmission side device (communication device) according to a first embodiment of the present invention. 本発明の第1実施形態に係る受電側機器（他の通信装置）のブロック構成図。FIG. 2 is a block configuration diagram of a power receiving device (another communication device) according to the first embodiment of the present invention. 本発明の第1実施形態に係る送電側機器と受電側機器との間に異物が混入された場合の処理シーケンス図。FIG. 5 is a processing sequence diagram when a foreign object is mixed between the power transmitting side device and the power receiving side device according to the first embodiment of the present invention. 本発明の第1実施形態に係る送電側機器と受電側機器との間に異物が混入された場合の処理手順を示すフローチャート。6 is a flowchart showing a processing procedure when a foreign object is mixed between the power transmitting side device and the power receiving side device according to the first embodiment of the present invention. 本発明の第2実施形態に係る異物検出を受電電圧で行う場合の送電側機器のブロック構成図。The block block diagram of the power transmission side apparatus in the case of performing the foreign material detection which concerns on 2nd Embodiment of this invention with a receiving voltage. 本発明の第2実施形態に係る異物検出を受電電圧で行う場合の受電側機器のブロック構成図。FIG. 5 is a block configuration diagram of a power receiving device when foreign matter detection according to a second embodiment of the present invention is performed at a power receiving voltage. 本発明の第2実施形態に係る送電側機器と受電側機器との間に異物が混入された場合の処理シーケンス図。FIG. 9 is a processing sequence diagram when a foreign object is mixed between a power transmission side device and a power reception side device according to a second embodiment of the present invention. 本発明の第2実施形態に係る送電側機器と受電側機器との間に異物が混入された場合の処理手順を示すフローチャート。9 is a flowchart showing a processing procedure when a foreign object is mixed between a power transmission side device and a power reception side device according to a second embodiment of the present invention. 本発明の第3実施形態に係る異物検出を受電電圧で行う場合の送電側機器のブロック構成図。FIG. 9 is a block configuration diagram of a power transmission side device when foreign object detection according to a third embodiment of the present invention is performed with a power reception voltage. 本発明の第3実施形態に係る送電側機器と受電側機器との間に異物が混入された場合の処理シーケンス図。FIG. 10 is a processing sequence diagram when a foreign object is mixed between a power transmission side device and a power reception side device according to a third embodiment of the present invention. 本発明の第3実施形態に係る送電側機器と受電側機器との間に異物が混入された場合の処理手順を示すフローチャート。9 is a flowchart showing a processing procedure when a foreign object is mixed between a power transmission side device and a power reception side device according to a third embodiment of the present invention.

以下、添付の図面を参照しながら、本発明の実施の形態について詳述する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

（第1実施形態）
＜1．通信システムの構成及び動作説明＞
図1は、本発明の一実施形態に係る通信システムの構成例を示す図である。図1において、101は送電側機器、102は受電側機器、103は金属等の異物である。また、送電側機器101と受電側機器102との間ではNFCによる非接触での無線通信が行われる。なお、周波数は13.56MHzを使用している。 (First embodiment)
<1. Configuration and operation of communication system>
FIG. 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present invention. In FIG. 1, 101 is a power transmission side device, 102 is a power reception side device, and 103 is a foreign substance such as metal. Further, non-contact wireless communication by NFC is performed between the power transmission side device 101 and the power reception side device 102. The frequency is 13.56MHz.

図2は、本発明の一実施形態に係る通信システムの動作説明図である。201及び203のT1の期間では、送電側機器101からの出力0.1Wの小出力レベルでのNFC通信により、送電側機器101は受電側機器102と通信する。受電側機器102では、送電側機器101から受電した電力でNFC通信のためのNFC回路を動作させ、NFC回路の中に実装されている負荷変調回路により、送電側機器101からの小出力レベルの信号により発生した磁界を変化させることで通信を行なう。   FIG. 2 is an operation explanatory diagram of the communication system according to the embodiment of the present invention. In the period T1 of 201 and 203, the power transmitting side device 101 communicates with the power receiving side device 102 by NFC communication at a small output level of 0.1 W output from the power transmitting side device 101. In the power receiving side device 102, the NFC circuit for NFC communication is operated with the power received from the power transmitting side device 101, and the load modulation circuit mounted in the NFC circuit reduces the output level from the power transmitting side device 101. Communication is performed by changing the magnetic field generated by the signal.

また、202及び204のT2の期間では、送電側機器101から出力5Wの出力レベルで受電側機器102に対して送電を行い、受電側機器102を充電する。204以降は、同様に充電のための送電を停止するまで、出力0.1Wの出力レベルによるNFC通信、出力5Wの出力レベルによる送電の動作を繰り返す。   Further, during the period T2 of 202 and 204, power is transmitted from the power transmitting side device 101 to the power receiving side device 102 at an output level of 5 W, and the power receiving side device 102 is charged. After 204, the NFC communication at the output level of 0.1 W and the power transmission at the output level of 5 W are repeated until the power transmission for charging is similarly stopped.

＜2．送電側機器及び受電側機器のブロック構成＞
まず図3を参照して、本発明の第1実施形態に係る送電側機器101（通信装置）のブロック構成の一例について説明する。 <2. Block configuration of power transmission side device and power reception side device>
First, an example of a block configuration of the power transmission side device 101 (communication device) according to the first embodiment of the present invention will be described with reference to FIG.

図3において、301は交流の出力を発生する送電部である。302はNFC通信を行なうために必要な機能が内蔵されたNFCチップであり伝送部として機能する。NFCチップ302はNFC通信で必要な出力を送電する機能も有している。 303はNFCチップ302による通信で必要な高周波特性を調整するためのインピーダンス調整部である。304は送電部301とNFCチップ302との接続経路を選択して切替える切替部である。305はNFC通信及び送電を行なうためのアンテナである。306は送電側機器101と受電側機器102との間の送電環境の変化（ひいては異物の存在）を検出する異物検出部である。異物検出部306は、例えば受電側機器102から充電に必要な受電電力値が実現できていない旨の通知を受けることで異物の存在を検出する。あるいは第3実施形態で後述するように受電側機器102における受電電力を使用して異物の存在を検出してもよい。   In FIG. 3, reference numeral 301 denotes a power transmission unit that generates an AC output. Reference numeral 302 denotes an NFC chip with a built-in function necessary for performing NFC communication, and functions as a transmission unit. The NFC chip 302 also has a function of transmitting an output necessary for NFC communication. Reference numeral 303 denotes an impedance adjustment unit for adjusting high-frequency characteristics necessary for communication using the NFC chip 302. Reference numeral 304 denotes a switching unit that selects and switches the connection path between the power transmission unit 301 and the NFC chip 302. Reference numeral 305 denotes an antenna for performing NFC communication and power transmission. Reference numeral 306 denotes a foreign matter detection unit that detects a change in the power transmission environment between the power transmission side device 101 and the power reception side device 102 (and hence the presence of foreign matter). The foreign object detection unit 306 detects the presence of a foreign object by receiving a notification from the power receiving device 102 that the received power value necessary for charging is not realized, for example. Alternatively, as described later in the third embodiment, the presence of a foreign object may be detected using the received power in the power receiving device 102.

307は送電部301、NFCチップ302、インピーダンス調整部303、切替部304の制御及びデータ処理を行ない、異物検出部306からは異物検出情報を受信するHost制御部である。308はHost制御部307が制御に必要なデータを格納するメモリである。309はNFC通信を行なうデータについて、アプリケーションを実行、処理する本体部（図示せず）とのインターフェイズを行なうアプリインターフェイス部である。310は各種表示を行なう表示部である。   A host control unit 307 performs control and data processing of the power transmission unit 301, the NFC chip 302, the impedance adjustment unit 303, and the switching unit 304, and receives foreign object detection information from the foreign object detection unit 306. A memory 308 stores data necessary for control by the host control unit 307. Reference numeral 309 denotes an application interface unit that interfaces data with NFC communication with a main body unit (not shown) that executes and processes the application. A display unit 310 performs various displays.

次に図4を参照して、本発明の第1実施形態に係る受電側機器102（他の通信装置）のブロック構成の一例について説明する。   Next, an example of a block configuration of the power receiving device 102 (another communication device) according to the first embodiment of the present invention will be described with reference to FIG.

図4において、401は受信した交流信号を整流して直流電圧に変換する受電部である。402は受電部401からの入力した電源を使用して充電制御を行なう充電制御部である。403は充電制御部402により充電される電池である。404は受電部401で受電した受電電圧をデジタル信号に変換するA/D変換器である。405はNFC通信を行なうために必要な機能が内蔵されたNFCチップであり伝送部として機能する。NFCチップ405はNFC通信で必要な電源をNFC通信の際に受信した信号から生成する。また、受信した信号について負荷のON／OFFにより変調を行なう負荷変調によって、通信相手である送電側機器101と通信を行なう。406は受電部401とNFCチップ405との接続経路を選択して切替える切替部である。407はNFC通信及び受電を行なうアンテナである。   In FIG. 4, 401 is a power receiving unit that rectifies a received AC signal and converts it into a DC voltage. A charge control unit 402 performs charge control using the power input from the power receiving unit 401. Reference numeral 403 denotes a battery charged by the charge control unit 402. Reference numeral 404 denotes an A / D converter that converts the received voltage received by the power receiving unit 401 into a digital signal. Reference numeral 405 denotes an NFC chip that incorporates functions necessary for performing NFC communication, and functions as a transmission unit. The NFC chip 405 generates power necessary for NFC communication from a signal received during NFC communication. Further, communication is performed with the power transmission side device 101 which is a communication partner by load modulation in which the received signal is modulated by ON / OFF of the load. Reference numeral 406 denotes a switching unit that selects and switches the connection path between the power receiving unit 401 and the NFC chip 405. An antenna 407 performs NFC communication and power reception.

408は受電部401、NFCチップ405、切替部406の制御及びデータ処理を行ない、A/D変換器404から受電電圧のデジタル値を受信するHost制御部である。409はHost制御部408が制御に必要なデータを格納するメモリである。410はNFC通信を行なうデータについて、アプリケーションを実行、処理する本体部（図示せず）とのインターフェイズを行なうアプリインターフェイス部である。411は各種表示を行なう表示部である。   A host control unit 408 performs control and data processing of the power reception unit 401, the NFC chip 405, and the switching unit 406, and receives a digital value of the power reception voltage from the A / D converter 404. Reference numeral 409 denotes a memory for storing data necessary for control by the host control unit 408. Reference numeral 410 denotes an application interface unit that performs an interface with a main body unit (not shown) that executes and processes an application for data that performs NFC communication. A display unit 411 performs various displays.

＜3．異物が混入された場合の処理＞
以下、図5および図6を参照して、異物が混入された場合の処理について説明する。図5は、本発明の第1実施形態に係る送電側機器101と受電側機器102との間に異物が混入された場合の対応処理シーケンスである。図6は、本発明の第1実施形態に係る送電側機器101と受電側機器102との間に異物が混入された場合の対応処理の手順を示すフローチャートである。 <3. Processing when foreign matter is mixed in>
Hereinafter, with reference to FIG. 5 and FIG. 6, a process when a foreign object is mixed will be described. FIG. 5 is a response processing sequence when a foreign object is mixed between the power transmission side device 101 and the power reception side device 102 according to the first embodiment of the present invention. FIG. 6 is a flowchart showing the procedure of the handling process when a foreign object is mixed between the power transmitting side device 101 and the power receiving side device 102 according to the first embodiment of the present invention.

送電側機器101は、定期的に受電側機器102が置かれたことを検出するためにリクエスト信号を送信する（F501）。受電側機器102は、切替部304によりNFCチップ405との接続経路への切り替えを行い、NFC通信ができる状態で送電側機器101の上に設置される。受電側機器102が送電側機器101の上に置かれた場合（S601）、受電側機器102は送電側機器101へ応答信号を送信する（F502、S602）。   The power transmission side device 101 periodically transmits a request signal to detect that the power reception side device 102 is placed (F501). The power receiving side device 102 is switched to the connection path with the NFC chip 405 by the switching unit 304, and is installed on the power transmitting side device 101 in a state where NFC communication is possible. When the power receiving device 102 is placed on the power transmitting device 101 (S601), the power receiving device 102 transmits a response signal to the power transmitting device 101 (F502, S602).

次に、NFC通信に必要なパラメータ交換をNFCデータ通信により実施する（F503、S603）。そして、受電側機器102が非接触充電に対応している機器か否かを認証する電力伝送認証を行なう（F504、S604）。電力伝送認証をパスすると非接触充電に必要なパラメータ交換を行なう（F505、S605）。パラメータ交換後、送電側機器101は、切替部304により送電部301との接続経路への切り替えを行い、送電部301から0.5Wの小出力で送電を開始する（F506、S606）。受電側機器102は、切替部406により受電部401との接続経路への切り替えを行い、受電部401での受電電力をA/D変換器404によりデジタル値に変換してHost制御部408に送る。Host制御部408はこの受電時の電力値(Rx1)をメモリ409の所定のエリアに格納する。   Next, parameter exchange necessary for NFC communication is performed by NFC data communication (F503, S603). Then, power transmission authentication is performed to authenticate whether the power receiving device 102 is a device that supports non-contact charging (F504, S604). If the power transmission authentication is passed, parameters necessary for contactless charging are exchanged (F505, S605). After the parameter exchange, the power transmission side device 101 switches the connection path with the power transmission unit 301 by the switching unit 304 and starts power transmission from the power transmission unit 301 with a small output of 0.5 W (F506, S606). The power receiving device 102 switches the connection path with the power receiving unit 401 by the switching unit 406, converts the power received by the power receiving unit 401 into a digital value by the A / D converter 404, and sends the digital value to the host control unit 408. . The host control unit 408 stores the power value (Rx1) at the time of power reception in a predetermined area of the memory 409.

そして、送電側機器101が受電電力値の要求を受電側機器102へ送信すると（F507、S607）、受電側機器102は、要求に対する応答として、メモリ409に格納している受電時の電力値（Rx1）を送電側機器101へ送信する（F508、S608）。送電側機器101は、受電電力値（Rx1）に基づいて、受電側機器102へ到達するまでの電力損失量を算出し、受電側機器102で必要な電力値に対して、必要な送電出力値を算出する。   Then, when the power transmission side device 101 transmits a request for the received power value to the power receiving side device 102 (F507, S607), the power receiving side device 102 receives the power value at the time of power reception stored in the memory 409 as a response to the request ( Rx1) is transmitted to the power transmission side device 101 (F508, S608). The power transmission side device 101 calculates the amount of power loss until it reaches the power receiving side device 102 based on the power receiving power value (Rx1), and the power transmission output value required for the power value required by the power receiving side device 102 is calculated. Is calculated.

次に、受電側機器102は、電池403の充電に必要な受電電力である送電出力値（Tx1）での送電を送電側機器101に対して要求する（F509、S609）。   Next, the power receiving side device 102 requests the power transmitting side device 101 to transmit power at the power transmission output value (Tx1) that is the received power necessary for charging the battery 403 (F509, S609).

送電側機器101は、当該要求を受信すると、要求された大出力である送電出力値(Tx1)での送電を所定時間T2（図2のT2）行う（F510、S610）。   Upon receiving the request, the power transmission side device 101 performs power transmission at the power transmission output value (Tx1) which is the requested large output for a predetermined time T2 (T2 in FIG. 2) (F510, S610).

次に、送電側機器101は、切替部304によりNFCチップ302との接続経路への切り替えを行う。受電側機器102は、切替部406によりNFCチップ405との接続経路への切り替えを行う。これによりNFC通信が可能になる（以降、接続経路の切り替えの説明は省略する）。   Next, the power transmission side device 101 switches the connection path to the NFC chip 302 by the switching unit 304. The power receiving device 102 performs switching to the connection path with the NFC chip 405 by the switching unit 406. As a result, NFC communication becomes possible (hereinafter, description of switching of connection paths is omitted).

受電側機器102は再度、電池403の充電に必要な受電電力である送電出力値（Tx1）での送電を送電側機器101に対して要求する（F511、S611）。次に、NFC通信によるデータ通信を、図2のT1期間の間行う（F512、S612）。   The power receiving side device 102 requests the power transmitting side device 101 to transmit power again at the power transmission output value (Tx1) that is the received power necessary for charging the battery 403 (F511, S611). Next, data communication by NFC communication is performed during the T1 period of FIG. 2 (F512, S612).

次に、送電側機器101は、再度、切替部304により送電部301との接続経路への切り替えを行う。そして受電側機器102は、切替部406により受電部401との接続経路への切り替えを行う。これにより充電状態にし、送電側機器101は要求を受信すると、要求された大出力である送電出力値(Tx1)での送電を所定時間T2（図2のT2）行う（F513、S613）。以降、NFC通信と送電とを交互に切り替える。   Next, the power transmission side device 101 performs switching to the connection path with the power transmission unit 301 by the switching unit 304 again. Then, the power receiving side device 102 switches the connection path to the power receiving unit 401 by the switching unit 406. As a result, when the power transmission side device 101 receives the request, the power transmission side device 101 performs power transmission at the power transmission output value (Tx1) which is the requested large output for a predetermined time T2 (T2 in FIG. 2) (F513, S613). Thereafter, NFC communication and power transmission are alternately switched.

送電期間中またはNFC通信期間中に送電側機器101の上に金属物等の異物が置かれ、送電期間T2に移行した場合（F514、S614）、送電側機器101の異物検出部306が異物を検出する（S615）。送電側機器101は、異物検出後、切替部304によりNFCチップ302との接続経路への切り替えを行う。受電側機器102は、異物検出後、次のNFC通信期間になった時に、切替部406によりNFCチップ405との接続経路への切り替えを行う。   When a foreign object such as a metal object is placed on the power transmission side device 101 during the power transmission period or the NFC communication period and shifts to the power transmission period T2 (F514, S614), the foreign object detection unit 306 of the power transmission side device 101 detects the foreign object. Detect (S615). The power transmission side device 101 performs switching to the connection path with the NFC chip 302 by the switching unit 304 after detecting the foreign matter. When the next NFC communication period comes after the foreign object is detected, the power receiving device 102 switches the connection path to the NFC chip 405 by the switching unit 406.

なお、送電期間T2中に送電側機器101が切替部304によりNFCチップ302の接続経路への切り替えを行うため、受電側機器102は送電部301からの送電を受電できなくなり、受電部401での受電電力値が低下する。そのため、送電期間T1の間に受電電力値が大きく低下した場合に異物が混入されたものと判定し、切替部406によりNFCチップ405との接続経路への切り替えを行うようにしてもよい。   Note that, during the power transmission period T2, the power transmission side device 101 performs switching to the connection path of the NFC chip 302 by the switching unit 304, so that the power reception side device 102 cannot receive power transmission from the power transmission unit 301, and the power reception unit 401 The received power value decreases. Therefore, it may be determined that a foreign object has been mixed when the received power value greatly decreases during the power transmission period T1, and the switching unit 406 may switch the connection path to the NFC chip 405.

送電側機器101は、NFC通信により、異物が置かれた後でもNFC通信が可能であるか確認するために受電側機器102に対して、NFC通信可否の確認要求を送信する（F515、S616）。受電側機器102は、当該要求を受信すると、NFC通信が可能であることを示す応答を送電側機器101へ送信する。   The power transmission side device 101 transmits a confirmation request as to whether or not NFC communication is possible to the power receiving side device 102 in order to confirm whether NFC communication is possible even after a foreign object is placed by NFC communication (F515, S616). . When receiving the request, the power receiving device 102 transmits a response indicating that NFC communication is possible to the power transmitting device 101.

送電側機器101は、受電側機器102からの応答を受信するまで所定時間待ち（S617）、所定時間の間に応答がない場合すなわち応答がタイムアウトした場合は、インピーダンス調整部303により、NFC通信の通信状態が最良になるように調整を行なう（F516、S618）。   The power transmission side device 101 waits for a predetermined time until the response from the power receiving side device 102 is received (S617). If there is no response during the predetermined time, that is, if the response times out, the impedance adjustment unit 303 performs NFC communication. Adjustment is performed so that the communication state is the best (F516, S618).

次に、送電側機器101は、受電側機器102に対してNFC通信可否の確認要求を再度送信する（F517、S619）。送電側機器101は、再度受電側機器102からの応答を受信するのを所定時間待ち（S518、S620）、所定時間の間に応答がない場合は処理を終了して、表示部310にエラー表示を行なう。なお、本実施形態ではインピーダンス調整とインピーダンス調整後のNFC通信可否の確認は1回行う動作を説明したが、送電側機器101が受電側機器102から応答を受信していない場合、再度、インピーダンス調整とNFC通信可否の確認を複数回実施してもよい。   Next, the power transmitting side device 101 transmits again a confirmation request for NFC communication availability to the power receiving side device 102 (F517, S619). The power transmitting side device 101 waits for a predetermined time to receive the response from the power receiving side device 102 again (S518, S620). If there is no response within the predetermined time, the processing ends and an error is displayed on the display unit 310. To do. In this embodiment, the adjustment of the impedance and the confirmation of NFC communication after the impedance adjustment have been performed once. However, when the power transmission side device 101 has not received a response from the power reception side device 102, the impedance adjustment is performed again. And NFC communication availability confirmation may be performed multiple times.

S617またはS620において、送電側機器101が受電側機器102から応答を受信した場合、Host制御部307は、NFC通信によるデータ通信を行なう必要があるデータが存在するか否かを判定し（S621）、通信すべきデータが無い場合は処理を終了し、表示部310に異物が置かれた旨の警告を表示する。一方、通信すべきデータが有る場合は、NFC通信によりデータ通信を行なった後（S519、S622）、処理を終了して、表示部310に異物が置かれた旨の警告を表示する。   In S617 or S620, when the power transmitting side device 101 receives a response from the power receiving side device 102, the Host control unit 307 determines whether or not there is data that needs to perform data communication by NFC communication (S621). If there is no data to be communicated, the process is terminated, and a warning that a foreign object has been placed is displayed on the display unit 310. On the other hand, if there is data to be communicated, after performing data communication by NFC communication (S519, S622), the processing is terminated and a warning that a foreign object has been placed is displayed on the display unit 310.

以上説明したように、本実施形態によれば、送電期間中に異物を検出しても、送電を完全に停止するのではなく、NFC通信が可能なように通信環境を適応させて、NFC通信によるデータ通信を実行することができる。   As described above, according to the present embodiment, even if a foreign object is detected during the power transmission period, the power transmission is not stopped completely, but the communication environment is adapted so that NFC communication is possible. The data communication by can be executed.

（第2実施形態）
第2実施形態では、受電側機器102における受電電力を使用して、受電側機器102で異物検出を行う場合の動作について説明する。 (Second embodiment)
In the second embodiment, an operation in the case where foreign matter detection is performed in the power receiving side device 102 using the received power in the power receiving side device 102 will be described.

まず図7を参照して、本発明の第2実施形態に係る送電側機器101のブロック構成の一例について説明する。図7の送電部701〜表示部709の各構成要素は、図3から異物検出部306を削除したものである。各構成要素は図3における対応する構成要素と同様の機能を有するため説明を省略する。   First, an example of a block configuration of the power transmission side device 101 according to the second embodiment of the present invention will be described with reference to FIG. Each component of the power transmission unit 701 to the display unit 709 in FIG. 7 is obtained by deleting the foreign object detection unit 306 from FIG. Each component has the same function as the corresponding component in FIG.

次に図8を参照して、本発明の第2実施形態に係る受電側機器102のブロック構成の一例について説明する。図8の受電部801〜表示部811の各構成要素は、図4の対応する構成と同様の機能を有するため詳細な説明を省略する。ただし、図8ではNFCチップ804とA/D変換器805とが接続されている点が図4の構成とは異なっており、A/D変換器805は受電部801で受電した受電電力をデジタル信号に変換する機能に加えて、NFCチップ804で受電した受電電力をデジタル信号に変換する機能も有する。   Next, an example of a block configuration of the power receiving device 102 according to the second embodiment of the present invention will be described with reference to FIG. Since each component of the power receiving unit 801 to the display unit 811 in FIG. 8 has the same function as the corresponding configuration in FIG. 4, detailed description thereof is omitted. However, FIG. 8 is different from the configuration of FIG. 4 in that the NFC chip 804 and the A / D converter 805 are connected. The A / D converter 805 digitally receives the received power received by the power receiving unit 801. In addition to the function of converting to a signal, it also has a function of converting received power received by the NFC chip 804 into a digital signal.

以下、図9および図10を参照して、異物が混入された場合の処理について説明する。図9は、本発明の第2実施形態に係る送電側機器101と受電側機器102との間に異物が混入された場合の対応処理シーケンスである。図10は、本発明の第2実施形態に係る送電側機器101と受電側機器102との間に異物が混入された場合の対応処理の手順を示すフローチャートである。   Hereinafter, with reference to FIG. 9 and FIG. 10, a process when foreign matter is mixed will be described. FIG. 9 is a response processing sequence when a foreign object is mixed between the power transmission side device 101 and the power reception side device 102 according to the second embodiment of the present invention. FIG. 10 is a flowchart showing the procedure of the handling process when a foreign object is mixed between the power transmitting side device 101 and the power receiving side device 102 according to the second embodiment of the present invention.

送電側機器101は定期的に受電側機器102が置かれたことを検出するためにリクエスト信号を送信する（F901）。受電側機器102は、切替部806によりNFCチップ804との接続経路への切替を行い、NFC通信ができる状態で、送電側機器101の上に設置される。受電側機器102が送電側機器101の上に置かれた場合（S1001）、応答信号を送信する（F902、S1002）。   The power transmission side device 101 periodically transmits a request signal to detect that the power reception side device 102 is placed (F901). The power receiving side device 102 is installed on the power transmitting side device 101 in a state where the switching unit 806 switches to the connection path with the NFC chip 804 and can perform NFC communication. When the power receiving device 102 is placed on the power transmitting device 101 (S1001), a response signal is transmitted (F902, S1002).

次に、NFC通信に必要なパラメータ交換をNFCデータ通信により実施する（F903、S1003）。そして、受電側機器102が非接触充電に対応している機器か否かを認証する電力伝送認証を行なう（F904、S1004）。この時、受電側機器102はNFCチップ804での受電電力をA/D変換器805でデジタル値に変換してHost制御部808に送る。   Next, parameter exchange required for NFC communication is performed by NFC data communication (F903, S1003). Then, power transmission authentication is performed to authenticate whether the power receiving device 102 is a device that supports non-contact charging (F904, S1004). At this time, the power receiving side device 102 converts the power received by the NFC chip 804 into a digital value by the A / D converter 805 and sends it to the host control unit 808.

電力伝送認証をパスすると、Host制御部808は、当該デジタル値(Rauth1)をメモリ809の所定のエリアに格納する（S1005）。そして、非接触充電に必要なパラメータ交換を行なう（F905、S1006）。なお、本実施形態では電力伝送認証時における受電側機器102での受電電力を記憶しているが、パラメータ交換時における受電電力を記憶してもよい。   If the power transmission authentication is passed, the host control unit 808 stores the digital value (Rauth1) in a predetermined area of the memory 809 (S1005). Then, parameter exchange necessary for non-contact charging is performed (F905, S1006). In the present embodiment, the received power at the power receiving device 102 at the time of power transmission authentication is stored, but the received power at the time of parameter exchange may be stored.

パラメータ交換後、送電側機器101は、切替部704により送電部701との接続経路への切替を行い、送電部701より0.5Wの小出力で送電する（F906、S1007）。受電側機器102は、切替部806により受電部801との接続経路への切り替えを行い、受電部801での受電電力をA/D変換器805によりデジタル値に変換してHost制御部808に送る。Host制御部808はこの値(Rx1)をメモリ809の所定のエリアに格納する。   After the parameter exchange, the power transmission side device 101 switches to the connection path with the power transmission unit 701 by the switching unit 704 and transmits power with a small output of 0.5 W from the power transmission unit 701 (F906, S1007). The power receiving side device 102 switches the connection path to the power receiving unit 801 by the switching unit 806, converts the power received by the power receiving unit 801 into a digital value by the A / D converter 805, and sends the digital value to the host control unit 808. . The host control unit 808 stores this value (Rx1) in a predetermined area of the memory 809.

そして、送電側機器101が受電電力値の要求を受電側機器102に送信すると（F907、S1008）、受電側機器102は、メモリ809に格納してある受電時の電力値（Rx1）を送電側機器101へ送信する（F908、S1009）。送電側機器101は、受電電力値（Rx1）に基づいて、受電側機器102に到達するまでの間の電力損失量を算出し、受電側機器102に要求される電力値に対して、必要な送電出力値を算出する。   When the power transmission side device 101 transmits a request for the received power value to the power receiving side device 102 (F907, S1008), the power receiving side device 102 receives the power value (Rx1) at the time of power reception stored in the memory 809 on the power transmission side. Transmit to the device 101 (F908, S1009). The power transmission side device 101 calculates the amount of power loss until it reaches the power receiving side device 102 based on the power reception power value (Rx1), and is necessary for the power value required for the power receiving side device 102. Calculate the power transmission output value.

次に、受電側機器102は、電池803の充電に必要な受電電力である送電出力値（Tx1）での送電を送電側機器101に対して要求する（F909、S1010）。そして、NFC通信によるデータ通信がある場合はデータ通信を行なう（F910、S1011）。送電側機器101は、送電要求を受信すると、要求された送電出力値(Tx1)での出力で送電を所定時間T2（図2のT2）行う（F911、S1012）。以降、受電側機器102の充電が完了するまで、NFC通信と送電とを交互に切り替える。   Next, the power receiving side device 102 requests the power transmitting side device 101 to transmit power at the power transmission output value (Tx1) that is the received power necessary for charging the battery 803 (F909, S1010). If there is data communication by NFC communication, data communication is performed (F910, S1011). When receiving the power transmission request, the power transmission side device 101 performs power transmission for a predetermined time T2 (T2 in FIG. 2) with the output at the requested power transmission output value (Tx1) (F911, S1012). Thereafter, NFC communication and power transmission are alternately switched until charging of the power receiving device 102 is completed.

送電期間中またはNFC通信期間中に送電側機器101の上に金属物等の異物が置かれ、送電期間に移行した場合（F912、S1013）、受電側機器102の受電部801は、異物による影響がある場合に受電電力に変動があることを認識する（S1014）。   When a foreign object such as a metal object is placed on the power transmission side device 101 during the power transmission period or the NFC communication period and shifts to the power transmission period (F912, S1013), the power receiving unit 801 of the power reception side device 102 is affected by the foreign object. When there is, it is recognized that there is a fluctuation in the received power (S1014).

受電側機器102は、電力伝送認証の時の送電出力値(Txauth；微小出力)による送電を送電側機器101に対して要求する（F913、S1015）。なお、この時送電時間を短縮するように要求してもよい。送電側機器101は、要求を受信すると、要求された送電出力値(Txauth)で送電を行う（F914、S1016）。   The power receiving side device 102 requests the power transmitting side device 101 to transmit power based on the power transmission output value (Txauth; minute output) at the time of power transmission authentication (F913, S1015). At this time, the power transmission time may be requested to be shortened. Upon receiving the request, the power transmission side device 101 performs power transmission with the requested power transmission output value (Txauth) (F914, S1016).

なお、本実施形態では、受電側機器102からの電力伝送認証の時の送電出力値(Txauth；微小出力)による送電の要求を受信した後、送電側機器101は要求された送電出力値(Txauth)による出力での送電を行うようにしたが、受電側機器102から、NFC通信を行なう所定の期間に送電出力値を示した送電の要求を送電側機器101が受信しなかった場合、電力伝送認証の時の送電出力値(Txauth；微小出力)による送電を行なうようにしてもよい。   In the present embodiment, after receiving a power transmission request from the power receiving side device 102 based on the power transmission output value (Txauth; minute output) at the time of power transmission authentication, the power transmitting side device 101 receives the requested power transmission output value (Txauth ), But the power transmission side device 101 does not receive a power transmission request indicating the power transmission output value from the power receiving side device 102 during a predetermined period during which NFC communication is performed. You may make it perform the power transmission by the power transmission output value (Txauth; minute output) at the time of authentication.

受電側機器102は、切替部806により受電部801との接続経路への切り替えを行い、受電部801での受電電力をA/D変換器805によりデジタル値に変換してHost制御部808に送る。Host制御部808は、当該受電電力のデジタル値を、メモリ809に記憶してある電力伝送認証時の受電電力値(Rauth1)と比較し（S1017）、所定の閾値以上の差がある場合は異物混入による影響で送電された電力が受電側機器102に伝達されなかったと判定する。すなわち異物が混入されたと判定し（S1018）、切替部806によりNFCチップ804との接続経路への切り替えを行った後、送電側機器101に対して異物が検出されたことを示すエラー通知を行う（F915、S1019）。なお、送電側機器101は、受電側機器102から要求された送電出力値(Txauth)での出力による送電の後、切替部704によりNFCチップ702との接続経路への切り替えを行う。   The power receiving side device 102 switches the connection path to the power receiving unit 801 by the switching unit 806, converts the power received by the power receiving unit 801 into a digital value by the A / D converter 805, and sends the digital value to the host control unit 808. . The host control unit 808 compares the digital value of the received power with the received power value (Rauth1) at the time of power transmission authentication stored in the memory 809 (S1017). It is determined that the transmitted electric power is not transmitted to the power receiving device 102 due to the influence of mixing. That is, it is determined that a foreign object has been mixed (S1018), and the switching unit 806 switches to the connection path with the NFC chip 804, and then notifies the power transmission side device 101 of an error indicating that a foreign object has been detected. (F915, S1019). Note that the power transmission side device 101 performs switching to the connection path with the NFC chip 702 by the switching unit 704 after power transmission by the output at the power transmission output value (Txauth) requested from the power receiving side device 102.

送電側機器101は、エラー通知を受信すると、NFC通信により、異物が置かれた後でもNFC通信が可能であるか否かを確認するために受電側機器102に対して、NFC通信可否の確認を要求する（F916、S1020）。なお、これ以降の動作（F917〜F920、S1021〜S1026）は第1実施形態の対応する処理と同様なので説明を省略する。   Upon receiving the error notification, the power transmission side device 101 confirms whether the NFC communication is possible or not with the power receiving side device 102 to confirm whether the NFC communication is possible even after a foreign object is placed by NFC communication. Is requested (F916, S1020). Since the subsequent operations (F917 to F920, S1021 to S1026) are the same as the corresponding processes in the first embodiment, the description thereof will be omitted.

以上説明したように、本実施形態では、電力伝送認証時における受電側機器102での受電電力を用いて受電側機器102で異物を検出するようにして、送電期間中に異物を検出しても、送電を完全に停止するのではなく、NFC通信が可能なように通信環境を適応させることができ、NFC通信によるデータ通信を行うことが可能となる。   As described above, in the present embodiment, even if a foreign object is detected during the power transmission period by using the received power at the power receiving device 102 at the time of power transmission authentication, Instead of completely stopping power transmission, the communication environment can be adapted so that NFC communication is possible, and data communication by NFC communication can be performed.

（第3実施形態）
第3実施形態では、受電側機器102における受電電力を使用して、送電側機器101で異物検出を行う場合の動作について説明する。 (Third embodiment)
In the third embodiment, an operation in the case where foreign matter detection is performed by the power transmission side device 101 using received power in the power reception side device 102 will be described.

図11を参照して、本発明の第3実施形態に係る送電側機器101のブロック構成の一例について説明する。図11の送電部1101〜表示部1111の各構成要素は、図3から異物検出部306を削除し、代わりに方向性結合器1106およびA/D変換器1107を備えたものである。各構成要素は図3における対応する構成要素と同様の機能を有するため詳細亜な説明は省略し、差異点を中心に説明する。方向性結合器1106は、送電部1101からの送電信号を、切替部1104を経由してアンテナ1105に送り、アンテナ1105で生じる反射による反射電力を出力する。A/D変換器1107は、方向性結合器1106からの反射電力をデジタル信号に変換する。Host制御部1108は、送電部1101、NFCチップ1102、インピーダンス調整部1103、切替部1104の制御及びデータ処理を行ない、A/D変換器1107からの反射電力のデジタル値を受信する。なお、受電側機器102の構成は、図8を参照して第2実施形態で説明した構成と同一のものである。   With reference to FIG. 11, an example of a block configuration of the power transmission side device 101 according to the third embodiment of the present invention will be described. Each component of the power transmission unit 1101 to the display unit 1111 in FIG. 11 is obtained by deleting the foreign object detection unit 306 from FIG. 3 and including a directional coupler 1106 and an A / D converter 1107 instead. Since each component has the same function as the corresponding component in FIG. 3, detailed description will be omitted, and differences will be mainly described. The directional coupler 1106 sends a power transmission signal from the power transmission unit 1101 to the antenna 1105 via the switching unit 1104, and outputs reflected power due to reflection generated by the antenna 1105. The A / D converter 1107 converts the reflected power from the directional coupler 1106 into a digital signal. The host control unit 1108 performs control and data processing of the power transmission unit 1101, the NFC chip 1102, the impedance adjustment unit 1103, and the switching unit 1104, and receives the digital value of the reflected power from the A / D converter 1107. The configuration of the power receiving device 102 is the same as that described in the second embodiment with reference to FIG.

以下、図12および図13を参照して、異物が混入された場合の処理について説明する。図12は、本発明の第3実施形態に係る送電側機器101と受電側機器102との間に異物が混入された場合の対応処理シーケンスである。図13は、本発明の第3実施形態に係る送電側機器101と受電側機器102との間に異物が混入された場合の対応処理の手順を示すフローチャートである。   Hereinafter, with reference to FIG. 12 and FIG. 13, a process when a foreign object is mixed will be described. FIG. 12 is a response processing sequence when a foreign object is mixed between the power transmission side device 101 and the power reception side device 102 according to the third embodiment of the present invention. FIG. 13 is a flowchart showing the procedure of the handling process when a foreign object is mixed between the power transmitting side device 101 and the power receiving side device 102 according to the third embodiment of the present invention.

送電側機器101は、定期的に受電側機器102が置かれたことを検出するためにリクエスト信号を送信する（F1201、S1301）。受電側機器102は、切替部806によりNFCチップ804との接続経路への切替を行い、NFC通信ができる状態で送電側機器101の上に設置される。受電側機器102が送電側機器101の上に置かれた場合は（S1301）、受電側機器102は送電側機器101に対して応答信号を送信する（F1202、S1302）。   The power transmission side device 101 periodically transmits a request signal to detect that the power reception side device 102 is placed (F1201, S1301). The power receiving side device 102 is switched to the connection path with the NFC chip 804 by the switching unit 806, and is installed on the power transmitting side device 101 in a state where NFC communication is possible. When the power receiving device 102 is placed on the power transmitting device 101 (S1301), the power receiving device 102 transmits a response signal to the power transmitting device 101 (F1202, S1302).

次にNFC通信に必要なパラメータ交換をNFCデータ通信により実施する（F1203、S1303）。そして、受電側機器102が非接触充電に対応している機器であるかを認証する電力伝送認証を行なう（F1204、S1304）。この時、受電側機器102は、NFCチップ804での受電電力をA/D変換器805によりデジタル値(Rauth1)に変換してHost制御部808に送る。電力伝送認証をパスすると、Host制御部808はこの値(Rauth1)をメモリ809の所定のエリアに格納する。   Next, parameter exchange required for NFC communication is performed by NFC data communication (F1203, S1303). Then, power transmission authentication is performed to authenticate whether the power receiving device 102 is a device that supports non-contact charging (F1204, S1304). At this time, the power receiving side device 102 converts the power received by the NFC chip 804 into a digital value (Rauth1) by the A / D converter 805, and sends it to the Host control unit 808. If the power transmission authentication is passed, the host control unit 808 stores this value (Rauth1) in a predetermined area of the memory 809.

次に、送電側機器101が受電電力値の要求を受電側機器102に対して送信すると（F1205、S1305）、受電側機器102は、メモリ809に格納してある電力伝送認証時の受電電力値（Rauth1）を読み出し、送電側機器101に送信する（F1206、S1306）。送電側機器101は、受電電力値(Rauth1)を受信すると、Host制御部1108がメモリ1109の所定のエリアに格納する（S1307）。そして、非接触充電に必要なパラメータ交換を行なう（F1207、S1308）。なお、本実施形態では電力伝送認証時における受電側機器102での受電電力を記憶しているが、パラメータ交換時における受電電力を記憶してもよい。   Next, when the power transmission side device 101 transmits a request for the received power value to the power receiving side device 102 (F1205, S1305), the power receiving side device 102 stores the received power value at the time of power transmission authentication stored in the memory 809. (Rauth1) is read and transmitted to the power transmission side device 101 (F1206, S1306). Upon receiving the received power value (Rauth1), the power transmission side device 101 stores the host control unit 1108 in a predetermined area of the memory 1109 (S1307). Then, parameter exchange necessary for contactless charging is performed (F1207, S1308). In the present embodiment, the received power at the power receiving device 102 at the time of power transmission authentication is stored, but the received power at the time of parameter exchange may be stored.

パラメータ交換後、送電側機器101は、切替部1104により送電部1101との接続経路への切り替えを行い、送電部1101よから0.5Wの小出力で送電する（F1208、S1309）。受電側機器102は、切替部806により受電部801との接続経路への切り替えを行い、受電部801での受電電力をA/D変換器805によりデジタル値に変換してHost制御部808に送る。Host制御部808は、このデジタル値(Rx1)をメモリ809の所定のエリアに格納する。   After the parameter exchange, the power transmission side device 101 switches the connection path to the power transmission unit 1101 by the switching unit 1104, and transmits power with a small output of 0.5 W from the power transmission unit 1101 (F1208, S1309). The power receiving side device 102 switches the connection path to the power receiving unit 801 by the switching unit 806, converts the power received by the power receiving unit 801 into a digital value by the A / D converter 805, and sends the digital value to the host control unit 808. . The host control unit 808 stores this digital value (Rx1) in a predetermined area of the memory 809.

そして、送電側機器101が受電電力値の要求を受電側機器102に送信すると（F1209、S1310）、受電側機器102は、メモリ809に格納してある受電時の電力値（Rx1）を送電側機器101に送信する（F1210、S1311）。   Then, when the power transmission side device 101 transmits a request for the received power value to the power receiving side device 102 (F1209, S1310), the power receiving side device 102 transmits the power value (Rx1) at the time of power reception stored in the memory 809 to the power transmission side. Transmit to the device 101 (F1210, S1311).

送電側機器101は、受電電力値に基づいて、受電側機器102に到達するまでの電力損失量を算出し、受電側機器102で要求した電力値に対して、必要な送電出力値を算出する。   The power transmission side device 101 calculates the amount of power loss until it reaches the power receiving side device 102 based on the received power value, and calculates the necessary power transmission output value for the power value requested by the power receiving side device 102. .

次に、受電側機器102は、電池803の充電に必要な受電電力である送電出力値（Tx1）での送電を送電側機器101に対して要求する（F1211、S1312）。そして、NFC通信によるデータ通信がある場合はデータ通信を行なう（F1212、S1313）。   Next, the power receiving side device 102 requests the power transmitting side device 101 to transmit power at the power transmission output value (Tx1) that is the received power necessary for charging the battery 803 (F1211, S1312). If there is data communication by NFC communication, data communication is performed (F1212, S1313).

送電側機器101は、当該送電要求を受信すると、要求された送電出力値(Tx1)で送電を所定時間T2（図2のT2）行う（F1213、S1314）。送電側機器101は、送電期間T2中に所定の間隔で方向性結合器1106から出力されるアンテナ1105での反射電力をA/D変換器1107によりデジタル値に変換して、Host制御部1108に送る。Host制御部1108は当該反射電力の値に変動がないか監視している。反射電力の変動検出は、例えば反射電力のデジタル値を所定のサンプル数分取得して平均値を算出し、この平均値と次のサンプルにおける平均値とを比較することで実現することができる。以降、受電側機器102の充電が完了するまで、NFC通信と送電とを交互に切り替える。   Upon receiving the power transmission request, the power transmission side device 101 performs power transmission for a predetermined time T2 (T2 in FIG. 2) with the requested power transmission output value (Tx1) (F1213, S1314). The power transmission side device 101 converts the reflected power at the antenna 1105 output from the directional coupler 1106 at a predetermined interval during the power transmission period T2 into a digital value by the A / D converter 1107, and sends it to the Host control unit 1108. send. The host control unit 1108 monitors whether there is a change in the value of the reflected power. The variation detection of the reflected power can be realized, for example, by acquiring a digital value of the reflected power for a predetermined number of samples, calculating an average value, and comparing the average value with the average value in the next sample. Thereafter, NFC communication and power transmission are alternately switched until charging of the power receiving device 102 is completed.

送電期間中またはNFC通信期間中に送電側機器101の上に金属物等の異物が置かれ、送電期間に移行した場合に（F1214、S1315）、Host制御部1108が反射電力に変動があることを認識すると（F1316）、送電側機器101は電力伝送認証の時の送電出力値(Txauth；微小出力)による送電を行なう（F1215、S1317）。なお、この時送電時間を短縮するようにしてもよい。   When a foreign object such as a metal object is placed on the power transmission side device 101 during the power transmission period or the NFC communication period, and the transition to the power transmission period (F1214, S1315), the host control unit 1108 has fluctuations in the reflected power (F1316), the power transmission side device 101 performs power transmission using the power transmission output value (Txauth; minute output) at the time of power transmission authentication (F1215, S1317). At this time, the power transmission time may be shortened.

受電側機器102は、切替部806により受電部801との接続経路への切り替えを行い、受電部801での受電電力をA/D変換器805によりデジタル値に変換してHost制御部808に送る。Host制御部808は、このデジタル値をメモリ809の所定のエリアに格納する。   The power receiving side device 102 switches the connection path to the power receiving unit 801 by the switching unit 806, converts the power received by the power receiving unit 801 into a digital value by the A / D converter 805, and sends the digital value to the host control unit 808. . The host control unit 808 stores this digital value in a predetermined area of the memory 809.

次に、送電側機器101は、切替部1104によりNFCチップ1102との接続経路への切り替えを行い、受電側機器102に受電電力値の通知要求を行なう（F1216、S1318）。同時に、受電側機器102は、切替部806によりNFCチップ804との接続経路への切り替えを行い、通知要求を受信するとメモリ809から受電電力値を読み出し、送電側機器101に送信する（F1217、S1319）。   Next, the power transmission side device 101 uses the switching unit 1104 to switch to the connection path with the NFC chip 1102, and requests the power reception side device 102 to notify the received power value (F1216, S1318). At the same time, the power receiving side device 102 switches to the connection path with the NFC chip 804 by the switching unit 806. Upon receiving the notification request, the power receiving side device 102 reads the received power value from the memory 809 and transmits it to the power transmitting side device 101 (F1217, S1319). ).

送電側機器101は、受電側機器102から受電電力値を受信すると、Host制御部1108は、当該受電電力値を、メモリ1109に記憶してある電力伝送認証時の受電電力値(Rauth1)と比較し（S1320）、所定の閾値以上の差がある場合は異物混入による影響で送電された電力が受電側機器102に伝達されなかった、すなわち異物混入と判定する（S1321）。   When the power transmission side device 101 receives the received power value from the power receiving side device 102, the Host control unit 1108 compares the received power value with the received power value (Rauth1) at the time of power transmission authentication stored in the memory 1109. If there is a difference equal to or greater than a predetermined threshold (S1320), it is determined that the transmitted power has not been transmitted to the power receiving side device 102 due to the influence of foreign matter, that is, foreign matter is mixed (S1321).

そして送電側機器101は、NFC通信により、異物が置かれた後でもNFC通信が可能であるか否かを確認するために受電側機器102に対して、NFC通信可否の確認を要求する（F1218、S1322）。送電側機器101は、受電側機器102からの受電電力値が所定時間経過しても受信できない場合にもNFC通信可否の確認を要求してもよい。   Then, the power transmission side device 101 requests the power receiving side device 102 to confirm whether or not NFC communication is possible in order to confirm whether or not NFC communication is possible even after a foreign object is placed by NFC communication (F1218). , S1322). The power transmission side device 101 may request confirmation of NFC communication availability even when the received power value from the power reception side device 102 cannot be received even after a predetermined time has elapsed.

なお、これ以降の動作（F1219〜F1222、S1323〜S1328）は第1実施形態の対応する処理と同様なので説明を省略する。   The subsequent operations (F1219 to F1222, S1323 to S1328) are the same as the corresponding processes in the first embodiment, and thus the description thereof is omitted.

以上説明したように、本実施形態では、電力伝送認証時における受電側機器102での受電電力を用いて、送電側機器101で異物を検出するようにして、送電期間中に異物を検出しても、送電を完全に停止するのではなく、NFC通信が可能なように通信環境を適応させることができ、NFC通信によるデータ通信を行うことが可能となる。   As described above, in the present embodiment, the foreign power is detected in the power transmission side device 101 by using the received power at the power receiving side device 102 at the time of power transmission authentication so that the foreign material is detected during the power transmission period. However, instead of completely stopping power transmission, the communication environment can be adapted so that NFC communication is possible, and data communication by NFC communication can be performed.

なお、上述の各実施形態では、送電側機器と受電側機器とにおいて、NFCチップと送電部または受電部との間でアンテナとの接続先を切替部により切り替え、1つのアンテナを共用してNFC通信と非接触充電とを行なう場合を例にして説明したが、NFC通信と非接触充電用に各々アンテナを設けてもよい。この場合は、非接触充電を行なうための送電で使用する周波数をNFC通信のものと異なるものにする。   In each of the above-described embodiments, in the power transmission side device and the power reception side device, the connection destination of the antenna is switched by the switching unit between the NFC chip and the power transmission unit or the power reception unit, and one antenna is shared to share the NFC. Although the case where communication and non-contact charging are performed has been described as an example, antennas may be provided for NFC communication and non-contact charging, respectively. In this case, the frequency used for power transmission for contactless charging is different from that for NFC communication.

（その他の実施形態）
また、本発明は、以下の処理を実行することによっても実現される。即ち、上述した実施形態の機能を実現するソフトウェア（プログラム）を、ネットワーク又は各種記憶媒体を介してシステム或いは装置に供給し、そのシステム或いは装置のコンピュータ（またはＣＰＵやＭＰＵ等）がプログラムを読み出して実行する処理である。 (Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

101…送電側機器、102…受電側機器、103…金属等の異物、301…送電部、302…NFCチップ、303…インピーダンス調整部、304…切替部、305…アンテナ、306…異物検出部、307…Host制御部、308…メモリ、309…アプリインターフェイス部、310…表示部、401…受電部、402…充電制御部、403…電池、404…A/D変換器、405…NFCチップ、406…切替部、407…アンテナ、408…Host制御部、409…メモリ、410…アプリインターフェイス部、411…表示部、1106…方向性結合器 101: Power transmission side device, 102: Power reception side device, 103: Foreign matter such as metal, 301 ... Power transmission unit, 302 ... NFC chip, 303 ... Impedance adjustment unit, 304 ... Switching unit, 305 ... Antenna, 306 ... Foreign matter detection unit, 307 ... Host control unit, 308 ... Memory, 309 ... Application interface unit, 310 ... Display unit, 401 ... Power receiving unit, 402 ... Charge control unit, 403 ... Battery, 404 ... A / D converter, 405 ... NFC chip, 406 ... Switching unit, 407 ... Antenna, 408 ... Host control unit, 409 ... Memory, 410 ... App interface unit, 411 ... Display unit, 1106 ... Directional coupler

Claims (15)

送電側機器と受電側機器とを備える通信システムであって、
前記送電側機器と前記受電側機器との間での送電環境の変化を検出する検出手段と、
前記検出手段により検出された前記送電環境の変化に基づいて送電出力値を制御する制御手段と、
前記制御手段により制御された前記送電出力値で、前記送電側機器と前記受電側機器との間でデータを伝送する伝送手段と、
を備えることを特徴とする通信システム。 A communication system comprising a power transmission side device and a power reception side device,
Detecting means for detecting a change in power transmission environment between the power transmission side device and the power reception side device;
Control means for controlling a power transmission output value based on a change in the power transmission environment detected by the detection means;
Transmission means for transmitting data between the power transmission side device and the power reception side device at the power transmission output value controlled by the control means,
A communication system comprising: 前記送電側機器は、前記送電環境が変化した後、前記データの伝送が可能であるか否かの確認要求を前記受電側機器に送信し、
前記受電側機器は、前記確認要求に対する応答を前記送電側機器へ送信し、
前記伝送手段は、前記送電側機器が前記応答を受信した後にデータを伝送することを特徴とする請求項1に記載の通信システム。 The power transmission side device transmits a confirmation request to the power receiving side device whether the data can be transmitted after the power transmission environment has changed,
The power receiving device transmits a response to the confirmation request to the power transmitting device,
2. The communication system according to claim 1, wherein the transmission unit transmits data after the power transmission side device receives the response. 前記送電側機器が前記応答を所定時間の間に受信しない場合、前記伝送手段による通信状態を調整するインピーダンス調整手段をさらに備えることを特徴とする請求項2に記載の通信システム。   3. The communication system according to claim 2, further comprising impedance adjustment means for adjusting a communication state by the transmission means when the power transmission side device does not receive the response within a predetermined time. 前記送電側機器は、前記インピーダンス調整手段により調整が行われた後、前記データの伝送が可能であるか否かの確認要求を前記受電側機器に再度送信することを特徴とする請求項3に記載の通信システム。   4. The power transmission side device transmits again a confirmation request as to whether or not transmission of the data is possible after the adjustment by the impedance adjustment unit to the power reception side device. The communication system described. 前記伝送手段は、前記送電側機器と前記受電側機器とにそれぞれ設けられており、
前記受電側機器の前記伝送手段は、前記送電側機器から送電された電力により動作することを特徴とする請求項1乃至4の何れか1項に記載の通信システム。 The transmission means is provided in each of the power transmission side device and the power reception side device,
5. The communication system according to claim 1, wherein the transmission unit of the power receiving side device operates with electric power transmitted from the power transmission side device. 前記送電側機器は、前記受電側機器が非接触充電に対応していることを認証した後に、前記受電側機器への送電を開始することを特徴とする請求項1乃至5の何れか1項に記載の通信システム。   6. The power transmission-side device starts power transmission to the power-receiving-side device after authenticating that the power-receiving-side device supports non-contact charging. The communication system according to 1. 前記受電側機器が前記検出手段を備えており、
前記検出手段は、前記受電側機器の受電電力値に基づいて前記送電環境の変化を検出することを特徴とする請求項1乃至6の何れか1項に記載の通信システム。 The power receiving side device comprises the detection means;
7. The communication system according to claim 1, wherein the detection unit detects a change in the power transmission environment based on a received power value of the power receiving side device. 前記送電側機器が前記検出手段を備えており、
前記検出手段は、前記受電側機器の受電電力値に基づいて前記送電環境の変化を検出することを特徴とする請求項1乃至6の何れか1項に記載の通信システム。 The power transmission side device comprises the detection means;
7. The communication system according to claim 1, wherein the detection unit detects a change in the power transmission environment based on a received power value of the power receiving side device. 前記送電環境の変化が検出された後に、前記伝送手段により伝送すべきデータがない場合、前記送電側機器は前記受電側機器への送電を停止することを特徴とする請求項1乃至8の何れか1項に記載の通信システム。   9. The power transmission side device stops power transmission to the power receiving side device when there is no data to be transmitted by the transmission means after the change of the power transmission environment is detected. The communication system according to claim 1. 前記検出手段は、前記送電環境の変化により前記送電側機器と前記受電側機器との間に異物が存在することを検出することを特徴とする請求項1乃至9の何れか1項に記載の通信システム。   10. The detection unit according to claim 1, wherein the detection unit detects that a foreign object exists between the power transmission side device and the power reception side device due to a change in the power transmission environment. Communications system. 前記検出手段により前記異物の存在が検出された場合、前記異物の存在を警告する警告手段をさらに備えることを特徴とする請求項10に記載の通信システム。   11. The communication system according to claim 10, further comprising a warning unit that warns of the presence of the foreign object when the detection unit detects the presence of the foreign object. 送電側機器と受電側機器とを備える通信システムの制御方法であって、
検出手段が、前記送電側機器と前記受電側機器との間での送電環境の変化を検出する工程と、
制御手段が、前記検出された前記送電環境の変化に基づいて送電出力値を制御する工程と、
伝送手段が、前記制御された前記送電出力値で、前記送電側機器と前記受電側機器との間でデータを伝送する工程と、
を有することを特徴とする通信システムの制御方法。 A control method of a communication system including a power transmission side device and a power reception side device,
A step of detecting a change in a power transmission environment between the power transmission side device and the power reception side device;
A step of controlling a power transmission output value based on the detected change in the power transmission environment;
A step of transmitting data between the power transmission side device and the power reception side device at the controlled power transmission output value;
A control method for a communication system, comprising: 他の通信装置へ送電を行う通信装置であって、
前記他の通信装置との間での送電環境の変化を検出する検出手段と、
前記検出手段により検出された前記送電環境の変化に基づいて送電出力値を制御する制御手段と、
前記制御手段により制御された前記送電出力値で、前記他の通信装置へデータを伝送する伝送手段と、
を備えることを特徴とする通信装置。 A communication device that transmits power to another communication device,
Detecting means for detecting a change in the power transmission environment with the other communication device;
Control means for controlling a power transmission output value based on a change in the power transmission environment detected by the detection means;
Transmission means for transmitting data to the other communication device at the power transmission output value controlled by the control means;
A communication apparatus comprising: 他の通信装置へ送電を行う通信装置の制御方法であって、
検出手段が、前記他の通信装置との間での送電環境の変化を検出する工程と、
制御手段が、前記検出された前記送電環境の変化に基づいて送電出力値を制御する工程と、
伝送手段が、前記制御された前記送電出力値で、前記他の通信装置へデータを伝送する工程と、
を有することを特徴とする通信装置の制御方法。 A communication device control method for transmitting power to another communication device,
A step of detecting a change in a power transmission environment with the other communication device;
A step of controlling a power transmission output value based on the detected change in the power transmission environment;
A step of transmitting data to the other communication device at the controlled power transmission output value;
A method for controlling a communication apparatus, comprising: 請求項14に記載の通信装置の制御方法の各工程をコンピュータに実行させるためのプログラム。   15. A program for causing a computer to execute each step of the communication device control method according to claim 14.
JP2014024729A 2014-02-12 2014-02-12 Communication system, communication device, control method therefor and program Pending JP2015154159A (en)

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JP2017085418A (en) * 2015-10-29 2017-05-18 キヤノン株式会社 Electronic apparatus
WO2019208332A1 (en) * 2018-04-24 2019-10-31 京セラ株式会社 Management system, control device, and management system control method
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Publication number Priority date Publication date Assignee Title
JP2017085418A (en) * 2015-10-29 2017-05-18 キヤノン株式会社 Electronic apparatus
JP2021502047A (en) * 2017-11-02 2021-01-21 エルジー イノテック カンパニー リミテッド Wireless charging method and equipment for it
JP7233424B2 (en) 2017-11-02 2023-03-06 エルジー イノテック カンパニー リミテッド Wireless charging method and device therefor
US11817716B2 (en) 2017-11-02 2023-11-14 Lg Innotek Co., Ltd. Wireless charging method and apparatus therefor
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US11233541B2 (en) 2020-03-31 2022-01-25 Panasonic Intellectual Property Management Co., Ltd. Communication control device, communication control system, and communication control method
WO2022264878A1 (en) * 2021-06-15 2022-12-22 キヤノン株式会社 Power transmitting device, power receiving device, control method, and program
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