JP2013230058A - Wireless connection adaptor to be inserted into lan-side jack or terminal-side jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless connection adaptor integrally achieving wireless power supply and wireless data communication, without need of a connector cable for connecting between a PoE hub and a PoE communication terminal.SOLUTION: A LAN-side wireless connection adaptor 2 is inserted into a PoE jack 11, to wirelessly supplying power received from a PoE hub 1 to a terminal-side wireless connection adaptor 3 through a high frequency power generator unit 203, a power supply device 205, etc., and to transmit/receive communication data through a modulator unit 213, a demodulator unit 222, etc. The terminal-side wireless connection adaptor 3 is inserted into a PoE jack 41, to wirelessly receive power from the LAN-side wireless connection adaptor 2 and transmit/receive communication data through a modulator unit 313, a demodulator unit 322, etc.

Description

  The present invention inserts data into a LAN side jack including a power supply terminal provided in a hub connected to a LAN and a terminal side jack provided in a communication terminal including a power receiving terminal, so that data and power can be wirelessly transmitted between the hub and the communication terminal. It relates to a wireless connection adapter to relay.

  In recent years, PoE devices conforming to the PoE (Power Over Ether) standard, which is a standard for supplying power from a LAN (Local Area Network) side, are becoming popular. The PoE equipment includes a PoE hub having a jack with a power feeding terminal to which a wired cable constituting the LAN is connected, a PoE communication terminal having a jack with a power receiving terminal that operates by receiving power from the PoE hub, and PoE hub and PoE communication. There is a connector cable that connects terminals. According to this PoE standard, it is possible to connect data exchange and power supply between a communication terminal and a hub connected to a LAN with a single connector cable, and the wiring is refreshed because a power cable and an outlet are not required. . As PoE communication terminals, the spread of communication terminals such as IP telephones and Web cameras has been progressing.

  However, even if the power cable to each communication terminal is not necessary, the connector cable (communication wiring) for connecting the PoE hub and the PoE communication terminal still remains. If this connector cable can also be made unnecessary, a very refreshing office environment without power supply wiring and communication wiring can be realized. For this purpose, it is necessary to transmit both data and power wirelessly, but power cannot be transmitted with the existing wireless LAN technology.

  As a technique for improving this, there is a wireless power feeding technique in which power is wirelessly fed through electromagnetic waves, ultrasonic waves, a resonating magnetic field or electric field, laser light, or the like (for example, Patent Document 1). The technique described in Patent Document 1 acquires position information of a power supply apparatus when supplying power to a moving power supply apparatus such as a mobile phone, and is located within a range where power can be supplied from the power supply side. The present invention relates to a wireless communication apparatus capable of wireless power feeding for supplying power wirelessly to the apparatus.

  However, the technique described in Patent Document 1 is intended to charge a mobile phone wirelessly, and wireless power feeding and wireless data communication are realized by different methods, which is not economical.

JP 2009-261157 A

  Therefore, an object of the present invention is to provide a wireless connection adapter that realizes wireless power feeding and wireless data communication in an integrated manner and does not require a connector cable for connecting a PoE hub and a PoE communication terminal.

  In order to solve the above problems, a wireless connection adapter to be inserted into a LAN side jack according to the present invention includes a power supply terminal that outputs power to be supplied to a communication terminal, a data output terminal that outputs data input by the communication terminal, A LAN-side wireless connection adapter that is inserted into a jack connected to a LAN, including a data input terminal that inputs data output from the communication terminal, and a wireless power supply unit that wirelessly supplies power to the communication terminal; Wireless data transmission means for wirelessly transmitting data to a communication terminal, and wireless data reception means for wirelessly receiving data from the communication terminal, wherein the wireless power supply means varies power received from the power supply terminal Converted to a magnetic field or a variable electric field, and the converted variable magnetic field or variable The wireless data transmitting means superimposes the data input from the data output terminal on the changing magnetic field or the changing electric field converted by the wireless power feeding means to the communication terminal. And the wireless data receiving means detects a current value fluctuation of a current flowing through a predetermined device constituting the wireless power feeding means, and outputs the data output by the communication terminal included in the detected current value fluctuation. Receiving, and outputting the received data to the data input terminal.

  The wireless connection adapter to be inserted into the terminal-side jack according to the present invention includes a power receiving terminal that inputs power received by the communication terminal, a data output terminal that outputs data output from the communication terminal, and the communication terminal inputs. A data input terminal for inputting data, a terminal-side wireless connection adapter inserted into a jack connected to an electric circuit provided in the communication terminal, and a wireless power receiving means for receiving power wirelessly; and the communication terminal outputs Wireless data transmitting means for wirelessly transmitting the received data and wireless data receiving means for wirelessly receiving data input by the communication terminal, wherein the wireless power receiving means is emitted by a device including wireless power feeding means A DC voltage is generated from a changing magnetic field or changing electric field, and the generated A current voltage is output to the power receiving terminal, and the wireless data receiving means extracts data transmitted to the communication terminal superimposed on the fluctuating magnetic field or fluctuating electric field, and the extracted data is input to the data Output to the terminal, the wireless data transmitting means applies the power received by the wireless power receiving means to a predetermined variable load, and the variable load according to the data output from the communication terminal input from the data output terminal The load value is varied.

  According to the present invention, since wireless power feeding and wireless data communication can be realized in an integrated manner, a wireless connection adapter that does not require a connector cable for connecting a PoE hub and a PoE communication terminal can be economically provided.

Internal block configuration diagram of wireless connection adapter according to the present invention Operation flowchart of LAN side wireless connection adapter according to the present invention Operational flow chart of terminal side wireless connection adapter according to the present invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an internal block configuration diagram of a wireless connection adapter inserted into a LAN side jack and a terminal side jack according to the present invention. The connection relationship between the wireless connection adapter and related devices is also shown.

  In FIG. 1, 1 is a PoE hub, 2 is a LAN-side wireless connection adapter according to the present invention, 3 is a terminal-side wireless connection adapter according to the present invention, and 4 is a PoE communication terminal that operates by receiving PoE power supply (for example, an IP phone or a Web camera). ) 5 is a LAN (wired).

  Although not shown, in the case of connection using a normal connector cable, the PoE plug 201 and the PoE plug 301 are connected by a wired cable. That is, the LAN side wireless connection adapter 2 and the terminal side wireless connection adapter 3 are adapters that are originally inserted into the PoE jack 11 and the PoE jack 41 that are connected to the connector cable (wired).

  The PoE hub 1 is a switching hub having a PoE power supply function corresponding to the IEEE 802.3af standard for supplying power of a communication terminal through a wired LAN cable, for example. It operates by receiving AC 100V (not shown) from a commercial power source, relays communication data between the LAN 5 and the LAN side wireless connection adapter 2 via the PoE jack 11 and the PoE plug 201, Power is supplied to the LAN side wireless connection adapter 2 with a DC voltage.

  The LAN-side wireless connection adapter 2 operates with electric power received from the PoE hub 1 via the PoE jack 11 and the PoE plug 201, and changes the electromagnetic field (fluctuating magnetic field or fluctuating) for wireless power supply by the received electric power. An electric field is generated, and the generated variable electromagnetic field is emitted to the terminal-side wireless connection adapter 3 on the PoE communication terminal 4 side. Further, communication data is relayed between the PoE hub 1 and the terminal-side wireless connection adapter 3 via the variable electromagnetic field of the wireless power feeding (details will be described later).

  Hereinafter, an internal block configuration of the LAN side wireless connection adapter 2 will be described.

  The PoE plug 201 is a plug that is inserted into the PoE jack 11 that is a LAN side jack of the PoE hub 1, and includes a plurality of terminals that transmit power and communication data.

  The PoE power receiving unit 202 outputs a DC voltage from the PoE hub 1 input to the power receiving terminal of the PoE plug 201 to the high frequency power generating unit 203 and supplies a predetermined voltage to each unit in the apparatus.

  The high frequency power generation unit 203 is a means for converting the DC voltage sent from the PoE power reception unit 202 into high frequency power (for example, 13.56 MHz).

  The matching circuit unit 204 is a matching circuit for wirelessly feeding the high frequency power generated by the high frequency power generation unit 203.

  The power feeding device 205 is a device including a power feeding coil, generates a variable electromagnetic field by high-frequency power, and emits the generated variable electromagnetic field to the terminal side wireless connection adapter 3 side.

  The LAN data input unit 211 outputs the LAN data (communication data from the LAN 5 side to the PoE communication terminal 4 side) input to the LAN data input terminal of the PoE plug 201 to the transmission buffer 212 and confirms that the LAN data has been received. Notify the relay control unit 231.

  The transmission buffer 212 temporarily stores the received LAN data, and appropriately outputs the LAN data to the terminal side wireless connection adapter 3 side through the modulation unit 213 and the like by flow control in cooperation with the relay control unit 231. To do.

  Upon receiving an instruction from the relay control unit 231, the modulation unit 213 performs PSK (Phase Shift Keying) modulation on the LAN data stored in the transmission buffer 212 and superimposes the high-frequency power output from the matching circuit unit 204. The modulation method may be a modulation method other than PSK.

  The current fluctuation detection unit 221 monitors the high-frequency power flowing into the power feeding device 205, detects the fluctuation of the current value caused by the load fluctuation of the variable load 321 in the terminal-side wireless connection adapter 3, and the signal of the current value fluctuation Is output to the demodulator 222. Note that the current value fluctuation signal is, for example, an FSK (Frequency Shift Keying) signal, and the current value fluctuation frequency is binary of f0 and f1, and f0 and f1 are 0 and 0 of the digital signal. Corresponds to 1.

  The demodulator 222 decodes the signal input from the current fluctuation detector 221 into terminal data transmitted from the PoE communication terminal 4 (communication data from the PoE communication terminal 4 side to the LAN 5 side), and outputs the decoded data to the reception buffer 223. The relay control unit 231 is notified that the terminal data has been received.

  The reception buffer 223 temporarily stores the received terminal data, and appropriately outputs the terminal data to the PoE hub 1 side by flow control in cooperation with the relay control unit 231.

  The terminal data output unit 224 transmits the terminal data stored in the reception buffer 223 to the PoE hub 1 via the terminal data output terminal of the PoE plug 201.

  The relay control unit 231 controls each unit in the LAN-side wireless connection adapter 2 and executes control related to relay of LAN data and terminal data. The operation flow of the LAN side wireless connection adapter 2 will be described later.

  The terminal-side wireless connection adapter 3 operates with power that is wirelessly fed from the LAN-side wireless connection adapter 2 and supplies power to the PoE communication terminal 4 via the PoE plug 301 and the PoE jack 41. Further, communication data is relayed between the LAN side wireless connection adapter 2 and the PoE communication terminal 4 via the variable electromagnetic field of the wireless power feeding (details will be described later).

  Hereinafter, the internal block configuration of the terminal-side wireless connection adapter 3 will be described.

  The PoE plug 301 is a plug that is inserted into the PoE jack 41 that is a terminal-side jack of the PoE communication terminal 4, and includes a plurality of terminals that transmit power and communication data.

  The PoE power supply unit 302 supplies power to the PoE communication terminal 4 through the power supply terminal of the PoE plug 301 with the DC voltage converted by the DC conversion unit 303. Further, the PoE communication terminal 4 connected to the PoE plug 301 detects whether or not a PoE compatible communication terminal is connected, and further detects the maximum power consumption class of the PoE communication terminal 4 connected to the PoE plug 301.

  The DC conversion unit 303 converts the high frequency power generated from the high frequency fluctuation electromagnetic field received by the power receiving device 305 into a predetermined DC voltage, outputs the DC voltage to the PoE power supply unit 302, and supplies the predetermined voltage to each unit in the apparatus. To do.

  The matching circuit unit 304 is a matching circuit for receiving the high frequency power generated from the high frequency fluctuation electromagnetic field by the power receiving device 305.

  The power receiving device 305 is a device including a coil for receiving power, and generates high frequency power by the received high frequency fluctuation electromagnetic field.

  The terminal data input unit 311 outputs the terminal data input to the terminal data input terminal of the PoE plug 301 to the transmission buffer 312 and notifies the relay control unit 331 that the terminal data has been received.

  The transmission buffer 312 temporarily stores the received terminal data, and appropriately outputs the terminal data to the LAN side wireless connection adapter 2 side by flow control in cooperation with the relay control unit 331.

  In response to the instruction from the relay control unit 331, the modulation unit 313 performs FSK modulation on the terminal data stored in the transmission buffer 312 and outputs it to the variable load 321. The modulation method may be other than FSK.

  The variable load 321 is applied with wirelessly received power, and fluctuates the load value according to the modulation signal input from the modulation unit 313. Then, the current value flowing through the power feeding device 205 of the LAN side wireless connection adapter 2 that is the wireless power feeding side fluctuates in conjunction with the load value fluctuation of the variable load 321, and terminal data can be transmitted to the LAN side wireless connection adapter 2. it can. The variable load 321 is, for example, a field effect transistor FET (Field Effect Transistor), and the resistance value (load) between the source terminal and the drain terminal is electronically controlled by controlling the voltage applied to the gate electrode. Can be controlled.

  The demodulation unit 322 demodulates the LAN data superimposed (PSK modulation) on the input high frequency power, extracts the LAN data from the LAN 5 side, outputs the LAN data to the reception buffer 323, and outputs the LAN data to the relay control unit 331. Notify that it has been received.

  The reception buffer 323 temporarily stores the received LAN data, and appropriately outputs the LAN data to the LAN data output unit 324 by flow control in cooperation with the relay control unit 331.

  The LAN data output unit 324 outputs the LAN data stored in the reception buffer 323 to the PoE communication terminal 4 via the LAN data output terminal of the PoE plug 301.

  The relay control unit 331 controls each unit in the terminal-side wireless connection adapter 3 and executes control related to relay of communication data. The operation flow of the terminal side wireless connection adapter 3 will be described later.

  By the way, the PoE communication terminal 4 is a communication terminal such as an IP telephone or a Web camera that operates by receiving PoE power supply from the terminal-side wireless connection adapter 3. For example, the IEEE 802. This is a terminal conforming to the 3af standard. The PoE jack 41 is a jack into which the PoE plug 301 of the terminal side wireless connection adapter 3 is inserted, and accommodates a plurality of terminals for transmitting power and communication data.

  The PoE communication terminal 4 is a communication terminal designed to be used by being connected to the PoE hub 1 with a connector cable (wired) in a general usage method.

  2 and 3 are operation flowcharts of the LAN side and terminal side wireless connection adapters according to the present invention.

  The operation flow of the LAN side wireless connection adapter 2 will be described with reference to FIG. This flowchart starts when the PoE plug 201 of the LAN side wireless connection adapter 2 is connected to the PoE jack 11 of the PoE hub 1 (S200).

  The PoE power receiving unit 202 determines whether or not the LAN side wireless connection adapter 2 can operate correctly and the wireless connection adapter can obtain the power necessary for the terminal side wireless connection adapter 3 by PoE power reception (S210). .

  When the PoE power receiving unit 202 determines that the necessary and sufficient power is received by PoE (S210, YES), the PoE power receiving unit 202 is used inside the adapter from the power received by the high frequency power generating unit 203. The power corresponding to the power is removed, the conversion to the high frequency power is permitted, and the converted and generated high frequency power is supplied to the power feeding device via the matching circuit unit 204, the modulation unit 213, and the current fluctuation detection unit 221. The wireless power supply to the terminal side wireless connection adapter 3 is started (S211).

  If the PoE power receiving unit 202 cannot determine that the necessary and sufficient PoE power can be obtained (S210, NO), the determination of the PoE power receiving capability is repeated.

  After starting the wireless power supply to the terminal-side wireless connection adapter 3, the LAN data input unit 211 determines whether or not the LAN data from the PoE hub 1 has been received (S220). If there is LAN data reception from the PoE hub 1 (S220, YES), the LAN data input unit 211 transfers the LAN data to the transmission buffer 212, and the transmission buffer 212 stores the LAN data (S221). At the same time, the LAN data input unit 211 notifies the relay control unit 231 that new LAN data has been received at that time.

  The relay control unit 231 notified of the reception of the LAN data monitors whether the state of the demodulation unit 222 is receiving terminal data from the terminal-side wireless connection adapter 3 (S222).

  If terminal data from the terminal-side wireless connection adapter 3 is not being received (S222, NO), the relay control unit 231 retrieves the LAN data stored in the transmission buffer 212 and processes it from the modulation unit 213. The modulation unit 213 superimposes (modulates) the corresponding LAN data on the high-frequency power in accordance with the notification, and the high-frequency power including the superimposed LAN data flows into the power feeding device 205 to wirelessly connect to the terminal-side wireless connection adapter 3. LAN data is transmitted together with the power supply (S223). At this time, since the high-frequency power including the LAN data passes through the current fluctuation detection unit 221, there is a possibility that the current value fluctuates due to the LAN data. Sometimes, the relay control unit 231 stops the demodulation operation of the demodulation unit 222, so there is no problem even if the current value fluctuation is input to the demodulation unit 222.

  If terminal data is being received from the terminal-side wireless connection adapter 3 (S222, YES), it waits until terminal data is not being received. If the LAN data input unit 211 determines that no LAN data is received from the PoE hub 1 (S220, NO), the LAN data input unit 211 notifies the relay control unit 231 of this.

  Then, the relay control unit 231 monitors the demodulation unit 222, receives terminal data from the terminal-side wireless connection adapter 3, that is, detects current fluctuation of wireless power feeding by the current fluctuation detection unit 221, and detects the terminal-side wireless connection adapter 3 It is monitored whether terminal data from the side has been received (S230).

  When receiving terminal data from the terminal-side wireless connection adapter 3 side and transmitting LAN data to the terminal-side wireless connection adapter 3 side at the same time, the transmission LAN data superimposed by the modulation unit 212 at this time It is only necessary to cancel the current fluctuation component generated by, and input only the current fluctuation component due to the terminal data to the demodulator 222.

  If the current fluctuation detection unit 221 detects a current fluctuation due to terminal data reception (S230, YES), the current fluctuation is transmitted to the demodulation unit 222, and the demodulation unit 222 demodulates the current fluctuation until the terminal data reception is completed. Then, the demodulated terminal data is transferred to the reception buffer 223. At the same time, the demodulation unit 222 notifies the relay control unit 231 that terminal data has been received from the terminal adapter side. If the terminal data is accumulated in the reception buffer 223, the terminal data output unit 224 extracts the corresponding terminal data from the reception buffer 223, outputs it to the PoE hub 1 side (S231), and returns to S210. If the current fluctuation detecting unit 221 does not detect the current fluctuation including the terminal data (S230, NO), the process returns to S210.

  Next, the operation flow of the terminal side wireless connection adapter 3 will be described with reference to FIG. This flowchart is started when the PoE plug 301 of the terminal side wireless connection adapter 3 is connected to the PoE jack 41 of the PoE communication terminal 4 (S300).

  First, the power receiving device 305 determines whether or not power that allows the terminal-side wireless connection adapter 3 to operate correctly can be obtained by wireless power reception (S310).

  If it is determined that electric power that allows the terminal-side wireless connection adapter 3 to operate correctly is obtained (S310, YES), the PoE power supply unit 302 converts the high-frequency power received by the power receiving device 305 into DC conversion by the DC conversion unit 303. The following confirmation is performed on the PoE communication terminal 4 using the (AC → DC) power.

  The PoE power supply unit 302 determines whether the PoE communication terminal 4 connected to the PoE plug 301 is a PoE compatible communication terminal, and the maximum power consumption class of the PoE communication terminal 4 can be supplied from the PoE power supply unit 302. It is confirmed whether it is in the range of (S320).

  When it is determined that the maximum power consumption class of the PoE communication terminal 4 is within the range of power that can be supplied by the PoE power supply unit 302 (S320, YES), the PoE power supply unit 302 PoE power supply is started (S321).

  When it is determined that the terminal device wireless connection adapter 3 does not have enough power to operate correctly (S310, NO) and the maximum power consumption class of the PoE communication terminal 4 is supplied to the PoE power supply unit 302. When it is determined that the power is not within the range of possible power (S320, NO), the process returns to S310, and confirmation of whether or not appropriate power is obtained by wireless power feeding in the power receiving device 305 is repeated.

  After PoE power supply to the PoE communication terminal 4 is started, the terminal data input unit 311 determines whether or not the terminal data from the PoE communication terminal 4 has been received (S330). If there is terminal data reception from the PoE communication terminal 4 (S330, YES), the terminal data input unit 311 transfers the terminal data to the transmission buffer 312, and the transmission buffer 312 accumulates the terminal data (S331). At the same time, the terminal data input unit 311 notifies the relay control unit 331 that new terminal data has been received at that time.

  The relay control unit 331 notified that the terminal data has been received monitors whether the state of the demodulation unit 322 is receiving LAN data from the LAN side wireless connection adapter 2 (S332).

  If the LAN data is not being received from the LAN side wireless connection adapter 2 (S332, NO), the relay control unit 331 notifies the modulation unit 313 that the terminal data stored in the transmission buffer 312 is extracted and processed. Then, the modulation unit 313 performs FSK modulation on the corresponding terminal data in accordance with the notification, and outputs the modulated signal to the variable load 321. The variable load 321 superimposes (modulates) terminal data on the received high-frequency power by generating a load fluctuation linked to the FSK modulation signal (that is, generating a current fluctuation on the LAN side wireless connection adapter 2 side), The terminal data is transmitted to the LAN side wireless connection adapter 2 (S333), and the terminal data input unit 311 notifies the relay control unit 331 of the fact, and the relay control unit 331 monitors the demodulation unit 322 and the LAN side wireless connection adapter. 2 waits for reception of LAN data from S2 (S340).

  If the LAN data is being received from the LAN side wireless connection adapter 2 (S332, YES), the process waits until the LAN data is not being received from the LAN side wireless connection adapter 2.

  If the terminal data input unit 311 determines that no terminal data has been received from the PoE communication terminal 4 (S330, NO), the terminal data input unit 311 notifies the relay control unit 331 of this fact, and the relay control unit 331 monitors the demodulator 322 and waits for the reception of LAN data from the LAN side wireless connection adapter 2 (S340).

  If the demodulator 322 receives power at the power receiving device 305 and detects reception of LAN data superimposed (modulated) on the high-frequency power input to the demodulator 322 via the matching circuit 304 and the variable load 321 (S340, YES) ), Demodulating until the reception of the LAN data is completed, and transferring to the reception buffer 323. At the same time, the demodulation unit 322 notifies the relay control unit 331 that LAN data has been received from the LAN side wireless connection adapter 2 side.

  If the LAN data is accumulated in the reception buffer 323, the LAN data output unit 324 extracts the corresponding LAN data from the reception buffer 323, outputs it to the PoE communication terminal 4 side (S341), returns to S310, and performs the above processing. repeat.

  If the demodulator 322 does not detect the reception of LAN data superimposed (modulated) on the high frequency power (S340, NO), the process returns to S310 and the above processing is repeated.

  Heretofore, an example of the embodiment of the present invention has been described. According to the present invention, since wireless power feeding and wireless data communication can be realized in an integrated manner, a wireless connection adapter that does not require a connector cable for connecting a PoE hub and a PoE communication terminal can be economically provided.

  In the described embodiments, various wireless power feeding technologies of an electromagnetic coupling type, an electric field coupling type, and a magnetic field resonance type that resonates at a specific frequency can be applied as a wireless power feeding method.

  Although not shown in FIG. 1, a plurality of terminal-side wireless connection adapters 3 may correspond to one LAN-side wireless connection adapter 2. In this case, in the wireless power feeding method based on the magnetic field resonance method that resonates at a specific frequency, interference between wireless power feeding and wireless data transmission can be avoided if the plurality of terminal-side wireless connection adapters 3 correspond to a plurality of predetermined frequencies. it can. As a result, a plurality of wireless connection adapters can be used simultaneously in the vicinity, and a plurality of LAN side wireless connection adapters can be inserted into the same PoE hub for use.

DESCRIPTION OF SYMBOLS 1 ... PoE hub 2 ... LAN side wireless connection adapter 3 ... Terminal side wireless connection adapter 4 ... PoE communication terminal 5 ... LAN
11 ... PoE jack 41 ... PoE jack 201 ... PoE plug 202 ... PoE power receiving unit 203 ... high frequency power generating unit (DC → AC)
204: matching circuit unit 205: power supply device 211 ... LAN data input unit 212 ... transmission buffer 213 ... modulation unit (PSK)
221 ... Current fluctuation detection unit 222 ... Demodulation unit (FSK)
223 ... Reception buffer 224 ... Terminal data output unit 231 ... Relay control unit 301 ... PoE plug 302 ... PoE power supply unit 303 ... DC converter (AC → DC)
304 ... Matching circuit unit 305 ... Power receiving device 311 ... Terminal data input unit 312 ... Transmission buffer 313 ... Modulation unit (FSK)
321 ... Variable load 322 ... Demodulator (PSK)
323... Reception buffer 324... LAN data output unit 331.

Claims (4)

A jack connected to a LAN, including a power supply terminal for outputting power to be supplied to the communication terminal, a data output terminal for outputting data input by the communication terminal, and a data input terminal for inputting data output by the communication terminal LAN side wireless connection adapter to be inserted into
Wireless power supply means for supplying power to the communication terminal wirelessly; wireless data transmission means for wirelessly transmitting data to the communication terminal; and wireless data reception means for wirelessly receiving data from the communication terminal. ,
The wireless power feeding means converts the power received from the power feeding terminal into a fluctuating magnetic field or fluctuating electric field, and emits the converted fluctuating magnetic field or fluctuating electric field to the communication terminal side, and the wireless data transmitting means The data input from the data output terminal is transmitted to the communication terminal superimposed on the changing magnetic field or the changing electric field converted by the wireless power supply means, and the wireless data receiving means constitutes the wireless power supply means. Detecting a current value variation of a current flowing through a predetermined device, receiving data output by the communication terminal included in the detected current value variation, and outputting the received data to the data input terminal. Wireless connection adapter to be inserted into the LAN side jack. The communication terminal includes: a power receiving terminal for inputting power received by the communication terminal; a data output terminal for outputting data output by the communication terminal; and a data input terminal for inputting data input by the communication terminal. A terminal side wireless connection adapter to be inserted into a jack connected to an electric circuit provided,
Wireless power receiving means for receiving power wirelessly, wireless data transmitting means for wirelessly transmitting data output from the communication terminal, and wireless data receiving means for wirelessly receiving data input by the communication terminal ,
The wireless power receiving means generates a DC voltage from a fluctuating magnetic field or a fluctuating electric field emitted by a device including a wireless power feeding means, and outputs the generated DC voltage to the power receiving terminal. The wireless data receiving means The data transmitted to the communication terminal superimposed on the changing magnetic field or the changing electric field is extracted, and the extracted data is output to the data input terminal. The wireless data transmitting means is received by the wireless power receiving means. Wireless connection to be inserted into a terminal-side jack, wherein applied power is applied to a predetermined variable load, and the load value of the variable load is varied according to data output from the communication terminal input from the data output terminal adapter. The wireless connection adapter according to claim 1 or 2,
The wireless connection adapter inserted into a LAN side jack or a terminal side jack, wherein the wireless power feeding means or the wireless power receiving means is compatible with a magnetic field resonance method that resonates at a specific frequency. The wireless connection adapter according to claim 3,
The specific frequency is one of a plurality of predetermined frequencies, and each of the plurality of predetermined frequencies corresponds to one of the plurality of LAN side jacks or terminal side jacks. A wireless connection adapter to be inserted into a LAN side jack or a terminal side jack.

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