JP2013169100A - Multi-hop information transmission unit corresponding to wireless power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-hop information transmission unit that dispenses with installation of a power cable and a battery change, in which the information transmission unit constituting a multi-hop information transmission system in which transmission information is multi-stage relayed in multi-hop manner is corresponded to a wireless power supply.SOLUTION: An information transmission unit 2 temporary stores power wirelessly received from a pre-stage via a power receiving device 201, a power conversion unit 203 in a power storage unit 210, and wirelessly supplies the stored power to a post-stage via a high frequency power supply unit 211 and a power supplying device 215 as well as superimposing transmission information on high frequency power of wireless supply and relaying it between a pre-stage side, a post-stage side, and an information apparatus 3 via a lower transmission information receiving unit 221, an upper transmission information receiving unit 222, and an upper transmission information transmitting unit 223.

Description

  The present invention relates to an information transmission unit constituting a multi-hop information transmission system that relays transmission information in multiple stages in a multi-hop manner.

  For example, when various sensor devices are installed indoors and outdoors, connection between a sensor device installed in a place without a wiring environment and a management device that exchanges data becomes a problem. For this reason, communication between the sensor device and the management device is often realized by a wireless communication technology that does not require wiring. However, the power supply problem still remains, and when there is no power outlet near the sensor device or when it is difficult to lay a new power cable, the sensor device is generally operated with a battery. In that case, there are new problems such as battery life, variation in remaining battery capacity, and battery replacement.

  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. In particular, when the position of the power receiver is out of range and there is a second wireless communication device that relays power, power is supplied to the power receiver using the second wireless communication device as a relay device. It is described.

  However, the technique described in Patent Document 1 does not consider transferring power to a distant wireless terminal by relaying power in multiple stages in a multi-hop manner (also called a bucket relay manner).

JP 2009-261157 A

  Therefore, an object of the present invention is to provide a function corresponding to wireless power feeding to each information transmission unit constituting a multi-hop type information transmission system that relays transmission information in a multi-hop manner in multiple stages, and lays a power cable or replaces a battery. Is to provide a multi-hop type information transmission unit that does not need to be used.

  In order to solve the above-mentioned problems, the present invention is an information transmission unit that constitutes an information transmission system that relays information in a multi-hop manner in a multi-stage manner. Wireless power receiving means for receiving power, lower transmission information receiving means for receiving lower transmission information from the front side to the rear side, notification information transmission means for sending notification information relating to the state of the own information transmission unit to the front side, and rear stage Wireless power feeding means for feeding power in a non-contact manner by a magnetic field or a fluctuating electric field, a notification information receiving means for receiving notification information related to the state from the subsequent stage, and the lower transmission information receiving means for receiving the downstream information A lower transmission information transmission means for transmitting the lower transmission information, and after the wireless power reception means starts receiving power, a part of the own information transmission unit Alternatively, after all functions are activated, the notification information transmitting means transmits notification information indicating that the function has been activated to the previous stage, the lower transmission information receiving means receives the lower transmission information from the previous stage, and the wireless power feeding means Starts power feeding, and if the wireless power feeding means starts power feeding, if the notification information receiving means receives notification information indicating that it has been activated from the subsequent stage, the lower transmission information transmitting means sends the received lower information The transmission information is transmitted to the subsequent stage.

  Further, the present invention is an information transmission unit constituting an information transmission system that relays information in a multi-hop manner in a multi-stage manner, and wireless power receiving means for receiving power in a non-contact manner by a magnetic field or a changing electric field that changes from the previous stage side. Wireless power supply means for supplying power in a non-contact manner by a magnetic field or electric field that fluctuates to the rear stage side, upper transmission information reception means for receiving upper transmission information from the rear stage side to the front stage side, and upper transmission information to the front stage side If the upper transmission information receiving means receives the upper transmission information from the subsequent stage after the wireless power feeding means starts feeding, the received upper transmission information Is transmitted to the preceding stage.

  According to the present invention, it is possible to provide a multi-hop information transmission unit that does not require installation of a power cable or battery replacement.

Configuration diagram of an information transmission system including an information transmission unit according to the present invention Sequence diagram of an information transmission system including an information transmission unit according to the present invention The internal block block diagram of the information transmission unit by this invention Operational flow chart of information transmission unit according to the present invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of an information transmission system (hereinafter also abbreviated as “this system”) that relays information in a multi-hop manner, including an information transmission unit (hereinafter also abbreviated as “this unit”) according to the present invention. is there.

  With reference to FIG. 1, the configuration and functional outline of this system will be described. 1 is a transmission information management device, 2 is an information transmission unit according to the present invention, 3 is an information device locally connected to the information transmission unit 2 (for example, a sensor device that detects changes in various states and a display device that displays information), Reference numeral 4 denotes an information processing apparatus (for example, a personal computer) that distributes, collects, and processes information.

  The transmission information management device 1 operates by receiving AC 100V from a commercial power source, and supplies power to the first-stage information transmission unit 2-1 in a non-contact manner by a fluctuating magnetic field generated by high-frequency power or a fluctuating electric field. The power is supplied by wireless power feeding, and the downward transmission information input from the information processing device 4 to the information transmission unit 2-1 is superimposed on the high frequency power of the wireless power feeding and transmitted.

Here, the downward transmission information is transmission information relayed in a multi-hop manner from the front side to the rear side (for example, distribution information such as in-house well-known information input from the information processing device 4). The upper and last information transmission units 2-N are defined as the lowest.
Moreover, the transmission information management apparatus 1 receives notification information or upward transmission information from the first-stage information transmission unit 2-1.

  Here, the upper transmission information is transmission information relayed in a multi-hop manner from the subsequent stage side to the previous stage side (for example, sensor information input from the sensor apparatus as the information apparatus 3), and the notification information is the own information transmission unit. 2 is information for notifying the preceding stage or the succeeding stage (for example, a preparation completion notice transmitted to the preceding stage when preparation for communication is completed).

  The transmission information management device 1 starts wireless power feeding to the first-stage information transmission unit 2-1 periodically or irregularly (for example, when downward transmission information is input from the information processing device 4).

  The information transmission unit 2 operates by receiving wireless power feeding from the front side, relays downward transmission information from the front side to the rear side, and connects an information input type information device 3 such as a display device to the unit. If the information is to be displayed, the transmitted downward transmission information is output to the information device 3. The determination as to whether or not the transmitted downward transmission information should be output to the information device 3 is made by comparing the address and information ID included in the downward transmission information with the address and information ID set in the information device 3. To do so.

  Further, when relaying the upward transmission information from the rear stage side to the front stage side, if the information output type information device 3 such as a sensor device is connected to this unit, the information is transmitted to the upper transmission information transmitted from the rear stage. The information input from the device 3 is added and relayed to the previous stage. The internal block configuration and operation flow of the information transmission unit 2 will be described later.

  The information device 3 is locally connected to the information transmission unit 2 wirelessly or by wire, and inputs information from the information transmission unit 2 or outputs local information to the information transmission unit 2. As an input information device 3 for inputting information from the information transmission unit 2, a display device for displaying the transmitted downward transmission information, and an information processing device for inputting, storing, and processing the transmitted downward transmission information ( For example, a personal computer). Examples of the output information device 3 that outputs information to the information transmission unit 2 include various sensor devices that detect various states such as the presence of a person, intrusion (vibration) of a person, temperature and humidity, or changes in the state. . In addition, the output information device 3 may be an information input device (for example, a tablet device) that outputs a message input by a person to the information transmission unit 2.

  The operating power of the information device 3 may be received from a commercial power source or a battery, or may be received from the information transmission unit 2 if the power is slight.

  The information processing apparatus 4 is an information processing apparatus such as a personal computer, and inputs / outputs transmission information to / from the transmission information management apparatus 1. The connection between the information processing apparatus 4 and the transmission information management apparatus 1 may be a local connection using a wired or short-range wireless communication method, or a connection via a network.

  FIG. 2 is a sequence diagram of an information transmission system that relays information in multiple stages in a multi-hop manner including an information transmission unit according to the present invention. The flow of transmission information and power will be described with reference to FIG.

  First, the downward transmission information and the power flow starting from the information processing device 4 will be described. When the information processing apparatus 4 inputs downward transmission information (for example, distribution information such as in-house known information) to the transmission information management apparatus 1 (S200), the transmission information management apparatus 1 wirelessly feeds power to the first stage information transmission unit 2-1. (S201), the information transmission unit 2-1 is activated.

  Power is received from the transmission information management device 1 by wireless power feeding (S202), and the activated information transmission unit 2-1 operates with the received power and accumulates surplus power. When the accumulated power exceeds a predetermined value (for example, a threshold at which communication is possible), a preparation completion notification indicating that the downward transmission information can be received is transmitted to the transmission information management apparatus 1 (S203), and the transmission information management apparatus The downward transmission information is received from 1 (S204).

  Next, the information transmission unit 2-1 starts power feeding by wireless power feeding to the subsequent information transmission unit 2-2 (S210), activates the information transmission unit 2-2, and also starts the information transmission unit 2-1. The received downward transmission information is output to the locally connected information device 3-1 (S212).

  When the information transmission unit 2-1 receives the preparation completion notification from the information transmission unit 2-2 that has started wireless power reception in S211 (S213), the information transmission unit 2-1 transmits the downward transmission information received from the transmission information management device 1 to the information transmission unit. The data is transmitted to 2-2 (S214).

  Similarly, the information transmission unit 2-2 starts wireless power feeding to the subsequent stage (S220), activates the information transmission unit 2-3, and the information device 3 locally connected to the information transmission unit 2-2. The received downward transmission information is output to -2 (S222). When the preparation completion notification is received from the subsequent stage (S223), the downward transmission information is transmitted to the subsequent stage (S224).

  By executing the above operations at each stage, the information processing device 4 → the transmission information management device 1 → the information transmission unit 2-1 → the information transmission unit 2-2 → the information transmission unit 2-3 →. In the flow of unit 2-N, the downward transmission information is relayed in multiple stages from the first stage side to the last stage side multi-hop. As a result, the downward transmission information starting from the information processing device 4 is transmitted to each stage, and the transmitted downward transmission information is displayed at the stage where the display device is locally connected as the information device 3. The downward transmission information may be directed to all information devices 3 locally connected to each stage, or directed to a specific information device 3 locally connected to a specific stage. Also good.

  Next, the flow of information when the information processing apparatus 4 collects upward transmission information from each information transmission unit 2 will be described.

  After the power by wireless power feeding reaches the last stage information transmission unit 2-N, when the upper transmission information is transmitted from the last stage side, the information transmission unit 2-N →... → the information transmission unit 2-3 → The flow of information transmission unit 2-2 → information transmission unit 2-1 → transmission information management device 1 → information processing device 4, that is, in the reverse order to the flow of downward transmission information, is multi-hop from the last stage side to the first stage side. The upward transmission information is relayed in multiple stages.

  Here, for the convenience of FIG. 2, the information transmission unit 2-2 will be described from the step (S250) in which the upward transmission information from the subsequent stage is received.

  In the example shown in FIG. 1, since the information device 3-2 locally connected to the information transmission unit 2-2 is a display system and no local information is input from the information device 3-2, the information transmission unit 2 -2 transmits the received upward transmission information as it is to the preceding information transmission unit 2-1 (S260).

  The information device 3-1 locally connected to the information transmission unit 2-1 has a sensor system function, and inputs sensor information from the information device 3-1 as local information (S261). Then, the information transmission unit 2-1 adds the input local information to the received upward transmission information (S262), and transmits it to the previous transmission information management device 1 (S270). Then, the transmission information management device 1 transmits the received upward transmission information to the information processing device 4 (S271).

  As described above, the information processing apparatus 4 gathers the local information from the information devices 3 of the information output system as upward transmission information, completes the information collection by the information processing apparatus 4, and the transmission information management apparatus 1 includes the information transmission unit 2 Wireless power supply to -1 is stopped (S280). Then, the wireless power reception in each information transmission unit 2 is automatically stopped (S281, S282).

  Next, the internal block configuration and function of the information transmission unit 2 will be described. FIG. 3 is an example of the internal block configuration of the information transmission unit according to the present invention.

  The relay control unit 200 controls each unit in the information transmission unit 2 and executes control related to wireless power feeding to the subsequent stage and relay of transmission information.

  The power receiving device 201 is a device including a coil that receives power wirelessly supplied from the previous stage, and receives a high-frequency fluctuating electromagnetic field (electromagnetic wave) for magnetic field resonance emitted from the previous stage.

  The matching circuit unit 202 is a matching circuit for receiving high frequency power from the high frequency fluctuation electromagnetic field received by the power receiving device 201 by magnetic field resonance.

  The power conversion unit 203 converts the received high-frequency power into a predetermined DC voltage, outputs the converted DC voltage to the power storage unit 210, and notifies the relay control unit 200 that the wireless power feeding from the previous stage is being received. To do.

  The power storage unit 210 is means for accumulating the power converted by the power conversion unit 203 into a DC voltage. For example, a large-capacity capacitor or a chargeable / dischargeable secondary battery is applicable.

  The high frequency power supply unit 211 is means for converting the electric power (direct current) accumulated in the power storage unit 210 into high frequency power for magnetic field resonance (for example, 13.56 MHz), and is activated / deactivated by an instruction from the relay control unit 200. .

  The matching circuit unit 212 is a circuit unit similar to the matching circuit unit 202 described above.

  The multiplexing unit 213 is a means for multiplexing the downstream transmission information output from the relay control unit 200 to the subsequent stage by superimposing the information on the high frequency power output from the matching circuit unit 212 to the subsequent stage. The high frequency power from the unit 212 is modulated with the downward transmission information (for example, amplitude modulation or phase modulation). This modulation may be executed by the high frequency power supply unit 211.

  In addition, instead of multiplexing the downward transmission information on the electric power to be wirelessly supplied, it is also possible to transmit the downward transmission information to the subsequent stage by a wireless communication method independent of the wireless power supply (not shown).

  The current fluctuation detection unit 214 is a unit that monitors the current value fluctuation of the wireless power feeding output from the power feeding device 215 to the subsequent stage, and detects the fluctuation of the current that flows in the rear stage of the wireless power feeding. Is output to the upward transmission information receiving unit 222. The current value fluctuation of the wireless power feeding is caused by the fluctuation of the load value of the load to which the power received wirelessly by the latter stage is applied, and the latter stage controls the fluctuation of the load value according to the upward transmission information.

  The power feeding device 215 is a device including a power feeding coil, and emits a fluctuating electromagnetic field generated by high frequency power for magnetic field resonance to the subsequent stage.

  The local connection unit 220 is a means for connecting the information device 3 such as a sensor device or a display device, performs local communication by wired or short-range wireless communication, and outputs the local information from the information device 3 to the relay control unit 200. To do. Alternatively, the downward transmission information from the relay control unit 200 is output to the information device 3.

  The lower transmission information receiving unit 221 is means for demodulating the modulation signal superimposed on the high frequency power received from the previous stage via the power receiving device 201 and the matching circuit unit 202 and extracting the lower transmission information. The extracted downward transmission information is output to the relay control unit 200.

  The upper transfer information receiving unit 222 extracts the upper transfer information converted into the current value fluctuation of the subsequent stage input from the current fluctuation detecting unit 214, that is, the fluctuation of the current flowing in the subsequent stage wirelessly fed from the power feeding device 215. It is a means to receive. For example, the upper transmission information transmitter 223 in the subsequent stage restores the upper transmission information subjected to pulse width modulation or pulse code modulation.

  The upper transmission information transmission unit 223 is a means for transmitting the upper transmission information to the previous stage, and modulates the load value to which the power supplied wirelessly from the previous stage is applied with the upper transmission information (for example, pulse width modulation or pulse code). Modulation). As the modulation of the load, although not shown, an element (for example, a field effect transistor) whose resistance value can be electronically controlled is inserted in series or in parallel in the output unit of the matching circuit unit 202, and the resistance value is transmitted upward. It may be controlled so as to vary according to the above. Then, the fluctuation of the input current to the matching circuit unit 202 according to the fluctuation of the resistance value occurs, and the fluctuation of the current value is transmitted to the previous stage as the fluctuation of the current value of the wireless power feeding.

  In addition, instead of performing fluctuation control on the current that flows due to the power received wirelessly with the upper transmission information, it is also possible to transmit the upper transmission information to the previous stage by a wireless communication method that is independent of wireless power feeding (not shown).

  FIG. 4 is an operation flowchart of the information transmission unit 2 according to the present invention. Hereinafter, the operation flow of the information transmission unit 2 will be described with reference to FIG.

  This flow starts when the information transmission unit 2 has established a connection environment with the transmission information management device 1 or the adjacent information transmission unit 2 (S400).

  In S410, the relay control unit 200 waits for wireless power feeding from the previous stage. However, in this standby state (S410, NO), the power consumed by the information transmission unit 2 may be 0, and the power storage unit 210 may be empty. That is, each block in the information transmission unit 2 may be stopped.

  When there is wireless power feeding from the previous stage (S410, YES), the high frequency power of the wireless power feeding received from the previous stage is input to the power conversion unit 203 via the power receiving device 201 and the matching circuit unit 202.

  At this stage, the power conversion unit 203 is activated, and the activated power conversion unit 203 converts the input high-frequency power into a DC voltage, and starts storing power (charging) in the power storage unit 210 with the converted DC voltage. (S411).

  When the power stored in the power storage unit 210 exceeds a predetermined amount of stored power that can supply voltage and current required by each block in the information transmission unit 2, it is determined that preparation for communication is completed, and preparation A completion notification is transmitted to the previous stage (S412).

  Furthermore, relay control unit 200 activates high-frequency power supply unit 211 when the power stored in power storage unit 210 exceeds the amount of stored power that can be wirelessly fed to the subsequent stage. Then, the high frequency power supply unit 211 generates high frequency power from the power (direct current) stored in the power storage unit 210, and this unit is supplied via the matching circuit unit 212, the multiplexing unit 213, the current fluctuation detection unit 214, and the power feeding device 215. 2 starts wireless power feeding to the subsequent stage (S413).

  Thereafter, the lower transmission information receiving unit 221 monitors whether or not the lower transmission information multiplexed with the wirelessly received high-frequency power is received. If the lower transmission information is received (S420, YES), the process proceeds to S421. If the downward transmission information is not received even after a certain time (for example, 3 minutes) has elapsed (S420, NO), the process proceeds to S440.

  In S421, when downward transmission information is received, information output system information device 3 such as a display device is locally connected to own unit 2, and the received downward transmission information is information to be output to information device 3 (S421, YES), the received downward transmission information is output to the information device 3 (S422), and the process proceeds to S430. If NO in S421, the process skips S422 and proceeds to S430.

  In S430, when the relay control unit 200 activates the upper transmission information receiving unit 222 and receives a preparation completion notification from the subsequent stage (S430, YES), it controls the multiplexing unit 213 to control the lower transmission information receiving unit 221. Is transmitted to the subsequent stage by superimposing the received lower transmission information on the high frequency power of the wireless power supply (S431), and proceeds to S440.

  In S430, when the state of not receiving the preparation completion notification from the subsequent stage (S430, NO) continues for a certain time (for example, 3 minutes) or longer (S432, YES), the relay control unit 200 has an error or no subsequent stage. The relay operation to the subsequent stage of the downward transmission information received from the previous stage is completed, and this unit 2 waits for the reception of the upward transmission information from the subsequent stage (S440).

  In S440, when the upward transmission information from the subsequent stage is received (S440, YES), the process proceeds to S441, and if there is input of local information from the information device 3 (S441, YES), the information is included in the upward transmission information received from the subsequent stage. The local information from the device 3 is added (S442), the information with the added local information is used as the upward transmission information to the previous stage, and the process proceeds to S450. If there is no input of local information from the information device 3 (S441, NO), S442 is skipped and the process proceeds to S450.

  In S440, even if a predetermined time (for example, 5 minutes) elapses, if the upward transmission information from the subsequent stage is not received (S440, NO), the process proceeds to S445, and if local information is input from the information device 3 ( (S445, YES), the own unit 2 becomes the starting point of the upward transmission information, and the input local information is used as it is as the upward transmission information to the previous stage (S446), and the upward transmission information generated in S446 is transmitted to the previous stage (S450). ), Go to S460.

  If there is no input of local information from the information device 3 (S445, NO), S446 and S450 are skipped and the process proceeds to S460. In this case, since no upward transmission information is generated from the subsequent stage or from the own unit 2, the upstream side is the starting point of the upward transmission information.

  In S460, the relay control unit 200 monitors whether or not the wireless power supply from the previous stage is continued. If the wireless power supply is continued (S460, YES), the process returns to S420 and if the wireless power supply is stopped. (S460, NO), this flow ends (S470).

  Heretofore, an example of the embodiment of the present invention has been described. According to the present invention, it is possible to provide a multi-hop information transmission unit that does not require installation of a power cable or battery replacement.

  In the described embodiment, the relay of the lower transmission information starting from the transmission information management device 1 and the relay of the upper transmission information starting from the information transmission unit 2-N side of the final stage are separated. In each information transmission unit 2, the relay operation related to the lower transmission information and the relay operation related to the upper transmission information do not compete. In addition, since reception and transmission (relay) of transmission information in adjacent information transmission units 2 are sequential, reception and transmission of transmission information to be relayed do not compete. In other words, since there is no contention for transmission and reception related to relay of transmission information, the operation is stable.

  In the described embodiment, the sequence of starting relaying of the upper transmission information starting from the information transmission unit 2-N side at the final stage after executing the relay of the lower transmission information starting from the transmission information management device 1 However, the present invention is not limited to this. That is, the relay of the lower transmission information starting from the transmission information management device 1 and the relay of the upper transmission information starting from the information transmission unit 2-N side of the final stage may be separated to form independent systems. Each may be activated independently.

  Furthermore, although the magnetic resonance method has been described as an example of the wireless power feeding method in the described embodiment, various wireless types such as an electromagnetic coupling type and an electric field coupling type in which power is supplied in a non-contact manner by a varying magnetic field or a varying electric field. General power supply technology is applicable.

  By the way, compared to the case where the transmission information management device 1 directly wirelessly supplies power to the information transmission unit 2-N at the final stage, the method of multi-hop relaying high-frequency power in a multi-hop manner as in the present invention is equivalent to the number of relays. It is inevitable that the power transmission efficiency will be reduced.

  However, in various wireless power feeding systems, the transmission efficiency is generally directional. Accordingly, when direct power feeding is performed directly from the transmission information management device 1 to each of the many information transmission units 2, the transmission efficiency to the information transmission unit 2 that is out of the directivity range becomes very small. The arrangement of 2 has a great limitation.

  On the other hand, when the power is relayed in a multi-hop manner in a multi-hop manner as in the present invention, it is easy to adjust the direction of wireless power feeding to the subsequent stage for each relaying information transmission unit 2, and the power of the entire system Transmission can be improved and wireless power feeding can be performed by bypassing an electromagnetic wave shield or the like.

DESCRIPTION OF SYMBOLS 1 ... Transmission information management apparatus 2 ... Information transmission unit 3 ... Information apparatus 4 ... Information processing apparatus 200 ... Relay control part 201 ... Power receiving device 202 ... Matching circuit part 203- .. Power conversion unit 210 ... Power storage unit 211 ... High frequency power supply unit 212 ... Matching circuit unit 213 ... Multiplexing unit 214 ... Current fluctuation detection unit 215 ... Power feeding device 220 ... Local connection unit 221 ... lower transmission information reception unit 222 ... upper transmission information reception unit 223 ... upper transmission information transmission unit

Claims (7)

An information transmission unit constituting an information transmission system for relaying information in a multi-hop manner in multiple stages,
Wireless power receiving means for receiving electric power in a non-contact manner by a magnetic field or a fluctuating electric field from the front side, a lower transmission information receiving means for receiving downward transmission information from the front side to the rear side, and a self-information transmission unit to the front side Notification information transmitting means for transmitting notification information relating to the state of
A wireless power feeding means for supplying power in a non-contact manner by a magnetic field or a fluctuating electric field that changes to the rear side, a notification information receiving means for receiving notification information relating to a state from the rear side, and the lower transmission information receiving means to the rear side Downward transmission information transmitting means for transmitting the received downward transmission information,
If some or all of the functions of the own information transmission unit are activated after the wireless power reception unit starts receiving power, the notification information transmission unit transmits notification information indicating that the unit has been activated to the previous stage, and transmits the downward transmission. The information receiving means receives downward transmission information from the front side, and the wireless power feeding means starts power feeding,
After the wireless power supply means starts power supply, if the notification information receiving means receives notification information indicating that it has been activated from the latter stage side, the lower transmission information transmission means transmits the received lower transmission information to the rear stage side. A multi-hop information transmission unit compatible with wireless power feeding. The information transmission unit according to claim 1,
It further has an information output means for outputting information to an information device locally connected to the own information transmission unit,
A wireless power transfer-compatible multi-function device, wherein the information output means outputs the received downward transmission information to the information device when the downward transmission information received from the preceding stage is information to be output to the information device. Hop-type information transmission unit. An information transmission unit constituting an information transmission system for relaying information in a multi-hop manner in multiple stages,
Wireless power receiving means that receives power in a non-contact manner by a magnetic field or electric field that fluctuates from the front side, wireless power feeding means that feeds power in a non-contact manner by a magnetic field or a fluctuating electric field that changes to the rear side, and a front stage from the rear side Upper transmission information receiving means for receiving the upper transmission information to the side, and upper transmission information transmission means for transmitting the upper transmission information to the previous stage side,
After the wireless power feeding means starts feeding, if the upper transmission information receiving means receives the upper transmission information from the rear stage side, the received upper transmission information is transmitted to the front stage side. Multi-hop information transmission unit. The information transmission unit according to claim 3,
A local information input means for inputting local information from an information device locally connected to the own information transmission unit;
When the local information input means inputs local information from the information device, the upper transmission information transmission means adds the input local information to the received upper transmission information and sets the previous information as upper transmission information to the previous stage. A multi-hop information transmission unit for wireless power feeding, characterized by transmitting to the side. The information transmission unit according to claim 4,
The locally connected information device is a state detection sensor that detects a predetermined state or a change in state in the vicinity of the self-information transmission unit, and the state detection sensor operates with the power received by the wireless power receiving unit. Multi-hop wireless power transfer compatible information transmission unit. The information transmission unit according to any one of claims 1 to 5,
The multi-hop wireless power feeding compatible information transmission unit, wherein the wireless power feeding means and the wireless power receiving means are of a magnetic field resonance type that resonates at a specific frequency. The information transmission unit according to any one of claims 1 to 6,
The notification information transmission unit or the upper transmission information transmission unit varies a value of a predetermined load for applying the power received by the wireless power reception unit according to the notification information or the upper transmission information,
The notification information receiving means or the upward transmission information receiving means receives the notification information or the upward transmission information by detecting a change in the current value of the power supplied by the wireless power supply means. Power transmission compatible information transmission unit.

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