Receiver

Abstract

Miniaturize a power receiving device used in a wireless power supply system. 【Solution means】 The power receiving device includes an antenna, a rectifier circuit, and a processing circuit. The antenna has an annular shape and includes a conductor having a predetermined width and a substrate. The rectifier circuit is installed on the substrate and rectifies the power supply signal received by the antenna. The processing circuit is installed on the substrate and executes processing for transmitting a data signal via the antenna.

Description

Technical Field

[0001] The present disclosure relates to a receiver.

Background Art

[0002] In recent years, wireless power supply that supplies power wirelessly has been realized.

[0003] Patent Document 1 discloses an antenna device having high antenna efficiency and flexibility.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to use wireless power supply in various applications, miniaturization of a power receiver used in a wireless power supply system is desired.

[0006] An object of the present disclosure is to miniaturize a power receiver used in a wireless power supply system.

Means for Solving the Problems

[0007] The receiver includes an antenna, a rectifier circuit, and a processing circuit. The antenna has an annular shape and includes a conductor having a predetermined width and a substrate. The rectifier circuit is installed on the substrate and rectifies the power supply signal received by the antenna. The processing circuit is installed on the substrate and executes processing for transmitting a data signal via the antenna.

Effects of the Invention

[0008] According to the present disclosure, a power receiver used in a wireless power supply system is miniaturized.

Brief Description of the Drawings

[0009]

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Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In all the drawings for describing the embodiments, the same reference numerals are given to common components, and repeated descriptions are omitted. Note that the following embodiments do not unduly limit the content of the present disclosure described in the claims. Also, not all of the components shown in the embodiments are essential components of the present disclosure. Also, each figure is a schematic diagram and is not necessarily drawn precisely.

[0011] <Overview> The wireless power supply system has a transmitter that transmits a power supply signal and a plurality of receivers that receive the power supply signal transmitted from the transmitter and generate electric power. The receiver receives, for example, radio waves in the 920 MHz band as a power supply signal. Also, the receiver transmits and receives, for example, radio waves in the 2.4 GHz band as a data signal. The receiver receives a power supply signal in the 920 MHz band and transmits and receives a data signal in the 2.4 GHz band with a single antenna.

[0012] <1 Configuration Diagram of the Entire System> FIG. 1 is a diagram showing the overall configuration of the WPT system 1 according to the present embodiment.

[0013] The WPT system 1 shown in FIG. 1 includes, for example, a transmitter 100, a receiver 200, a first information processing device 300, and a second information processing device 400. The WPT system 1 shown in FIG. 1 is used, for example, in a building or a factory. Note that the connection between the transmitter 100 and the first information processing device 300, and the connection between the first information processing device 300 and the second information processing device 400 may be wired or wireless.

[0014] In FIG. 1, an example in which the WPT system 1 includes three transmitters 100 is shown, but the number of transmitters 100 included in the WPT system 1 is not limited to three. The number of transmitters 100 included in the WPT system 1 may be two or less, or may be four or more.

[0015] In FIG. 1, an example in which the WPT system 1 includes seven receivers 200 is shown, but the number of receivers 200 included in the WPT system 1 is not limited to seven. The number of receivers 200 included in the WPT system 1 may be six or less, or may be eight or more.

[0016] Note that in this specification, the transmitter 100 is a (power) transmitter 100 in the sense of wirelessly transmitting power. Similarly, the receiver 200 is a (power) receiver 200 in the sense of wirelessly receiving power. As will be described later, the receiver 200 may transmit information regarding the state of the receiver 200 or information regarding the measurement result by a sensor to the transmitter 100 as a data signal, and the transmitter 100 may receive such a data signal. In this case, the transmitter 100 is a receiver that receives a data signal, and the receiver 200 functions as a transmitter that transmits a data signal.

[0017] In FIG. 1, an example in which the WPT system 1 includes two first information processing devices 300 is shown, but the number of first information processing devices 300 included in the WPT system 1 is not limited to two. The number of first information processing devices 300 included in the WPT system 1 may be one, or may be three or more.

[0018] The transmitter 100 transmits, for example, a power supply signal or a data signal to the receiver 200. The transmitter 100 transmits a power supply signal to the receiver 200 by radio waves in the 920 MHz band, for example. The transmitter 100 transmits a data signal to the receiver 200 by radio waves in the 2.4 GHz band, for example. The transmitter 100 may transmit the data signal by radio waves in the 920 MHz band.

[0019] The power supply signal transmitted from the transmitter 100 may be, for example, a continuous wave (CW) having a predetermined power. Also, the frequency band of the power supply signal is, for example, the 920 MHz band in consideration of the distance between the transmitter 100 and the receiver 200. If the band is higher in frequency than the exemplified frequency band, the receiver 200 may not be able to supply power at a predetermined power at which it can operate unless the distance between the transmitter 100 and the receiver 200 is shortened. Therefore, an appropriate frequency band can be determined by considering the practical range (for example, the distance between the transmitter 100 and the receiver 200 is several meters).

[0020] At this time, due to laws and regulations of the country where the WPT system 1 is installed, there may be a restriction on intermittently performing a power supply signal having a predetermined power. For example, when the power supply signal from the transmitter 100 falls under the regulations of a radio station stipulated in the Radio Law of Japan (regardless of the presence or absence of a license), it may be necessary to provide a certain pause period for the power supply signal based on the Radio Law. In this case, considering on a certain time axis, the power supply signal cannot be said to be a continuous wave. However, it is important to provide a pause period, and even if this pause period is short, the power supply signal transmitted from the transmitter 100 can be regarded as a substantially continuous continuous wave. The ratio of the duration of the power supply signal to the time of the pause period may be such that, as described above, the power supply signal transmitted from the transmitter 100 can be regarded as a substantially continuous continuous wave. For example, the time of the pause period is about 1 / 50 to 1 / 100 of the duration of the power supply signal.

[0021] The transmitter 100 may supply power to, for example, one receiver 200 or multiple receivers 200. The transmitter 100 may transmit a data signal to, for example, one receiver 200 or multiple receivers 200. The transmitter 100 may transmit the same data signal as another transmitter 100, or may transmit a data signal different from that of another transmitter 100. The transmitter 100 may transmit, for example, a predetermined command signal as a data signal to the receiver 200, or may transmit a preset signal as a data signal to the receiver 200.

[0022] The transmitter 100 receives, for example, a data signal transmitted from the receiver 200. The transmitter 100 may receive a data signal transmitted from, for example, one receiver 200 or may receive data signals transmitted from multiple receivers 200. The transmitter 100 transmits the data signal transmitted from the receiver 200 to the first information processing device 300. The transmitter 100 transmits information regarding the state of the transmitter 100 to the first information processing device 300.

[0023] The receiver 200 receives, for example, a power supply signal or a data signal transmitted from the transmitter 100. For example, if the receiver 200 has a power storage unit, the receiver 200 converts the power supply signal transmitted from the transmitter 100 into electric power and stores the converted electric power in the power storage unit. For example, if the receiver 200 has a predetermined sensor, the receiver 200 converts the power supply signal transmitted from the transmitter 100 into electric power and drives the sensor with the converted electric power.

[0024] The receiver 200 transmits information regarding the state of the receiver 200 or information regarding the measurement result by the sensor to the transmitter 100 as a data signal.

[0025] The first information processing device 300 is an information processing device that monitors the operations of the transmitter 100 and the receiver 200 accommodated in the WPT system 1. For example, based on the information regarding the states of the transmitter 100 and the receiver 200, which is transmitted from the transmitter 100, the first information processing device 300 determines whether the transmitter 100 or the receiver 200 is in a preset state. If it is determined that the device is in the preset state, the first information processing device 300 transmits predetermined information to the second information processing device 400.

[0026] In addition, the first information processing device 300 accumulates information about the transmitter 100 and the receiver 200 accommodated in the WPT system 1. For example, the first information processing device 300 stores the information regarding the states of the transmitter 100 and the receiver 200, which is transmitted from the transmitter 100, in a storage unit provided in the first information processing device 300.

[0027] In addition, the first information processing device 300 controls the operation of the transmitter 100 accommodated in the WPT system 1. For example, the first information processing device 300 transmits a predetermined instruction or information to the transmitter 100.

[0028] In addition, the first information processing device 300 controls the operation of the second information processing device 400.

[0029] The second information processing device 400 is, for example, an information processing device operated by the administrator of the WPT system 1. When the second information processing device 400 receives from the first information processing device 300 a notice that the transmitter 100, the receiver 200, or both of them accommodated in the WPT system 1 are in a predetermined state, the second information processing device 400 presents to the user that the transmitter 100, the receiver 200, or both of them are in the predetermined state.

[0030] In addition, the second information processing device 400 analyzes the information regarding the states of the transmitter 100 and the receiver 200, which is stored in the first information processing device 300, and presents predetermined information to the user. The predetermined information is, for example, as follows. · Information regarding the arrangement of the transmitter 100 · Information regarding the arrangement of the receiver 200 · Information on power consumption · Information on power quantity

[0031] <Configuration of Transmitter and Receiver> FIG. 2 is a block diagram showing a configuration example of the transmitter 100 and the receiver 200 shown in FIG. 1. As shown in FIG. 2, the transmitter 100 and the receiver 200 are, for example, separated from each other at a predetermined interval. For example, the transmitter 100 and the receiver 200 are installed at a distance of about several meters. Specifically, for example, the transmitter 100 is fixedly installed at a predetermined high position provided on a high place indoors, for example, on the ceiling or a wall. The receiver 200 is installed on a predetermined device indoors or placed near a device that requires power supply. Further, the receiver 200 may be carried by a user. The transmitter 100 transmits a power supply signal to the receiver 200 by radio waves of a predetermined frequency, for example, in the 920 MHz band. The receiver 200 converts the power supply signal transmitted from the transmitter 100 into power, and charges the converted power or supplies the converted power to a predetermined device.

[0032] The transmitter 100 has, for example, an oscillator 101, a transmission antenna 102, a microcomputer (controller) 103, a data transceiver 104, and a data transceiver antenna 105. The oscillator 101, the microcomputer 103, the data transceiver 104, the data transceiver antenna 105, or at least any combination thereof may be mounted on, for example, a PCB (printed circuit board).

[0033] The oscillator 101 oscillates a signal in a predetermined frequency band, for example, in the 920 MHz band. The oscillated signal may be amplified and unnecessary frequency components may be removed as necessary.

[0034] The transmission antenna 102 is formed, for example, to be able to efficiently transmit radio waves in the 920 MHz band. The transmission antenna 102 radiates the signal oscillated by the oscillator 101 as a power supply signal.

[0035] The microcontroller 103 controls the operation of the transmitter 100. The microcontroller 103 is realized by, for example, a semiconductor device equipped with an ARM processor. The microcontroller 103 controls, for example, the transmission of radio waves by the transmission antenna 102.

[0036] The data transceiver 104 performs processes such as analog conversion of digital data and modulation of analog data. Further, the data transceiver 104 performs processes such as demodulation of the data signal received by the data transmission / reception antenna 105 and digitization of the demodulated data. The data transceiver 104 extracts, for example, a predetermined signal from the data signal received by the data transmission / reception antenna 105, converts it into digital data, and transmits it to the microcontroller 103.

[0037] The data transmission / reception antenna 105 is formed, for example, to be able to efficiently transmit and receive radio waves in the 2.4 GHz band. The data transmission / reception antenna 105 radiates the data signal supplied from the data transceiver 104. Further, the data transmission / reception antenna 105 receives the data signal transmitted from the receiver 200.

[0038] The receiver 200 includes, for example, an antenna 201, a rectifier 202, a power management unit 203, a power storage unit 204, a microcontroller 205, and a data transceiver 206. The antenna 201, the rectifier 202, the power management unit 203, the power storage unit 204, the microcontroller 205, the data transceiver 206, or at least any combination thereof may be mounted on, for example, a PCB or an FPC (flexible printed circuit board).

[0039] The antenna 201 is formed, for example, to be able to efficiently receive radio waves in the 920 MHz band. The antenna 201 receives the power supply signal radiated from the transmission antenna 102.

[0040] Antenna 201 is formed to be able to efficiently receive radio waves in the 920 MHz band, for example, and can transmit and receive radio waves in the 2.4 GHz band. Antenna 201 radiates the data signal supplied from data transceiver 206. Also, Antenna 201 receives the data signal transmitted from transmitter 100. For example, Antenna 201 is driven by the DC voltage supplied from power management unit 203 or the power discharged from power storage unit 204.

[0041] Rectifier 202 rectifies the radio wave received as a power supply signal and converts it into a DC voltage.

[0042] Power management unit 203 manages the DC voltage. For example, power management unit 203 controls the charging voltage based on the DC voltage. Power management unit 203 charges power storage unit 204 by controlling the charging voltage. Also, power management unit 203 supplies the DC voltage to the connected members, for example, when power of a predetermined capacity or more is stored in power storage unit 204.

[0043] Also, power management unit 203 discharges the power stored in power storage unit 204 according to the control from microcomputer 205.

[0044] Power storage unit 204 stores power according to the instruction from power management unit 203. Power storage unit 204 is realized by, for example, a battery or a capacitor. Also, power storage unit 204 discharges the stored power according to the instruction from power management unit 203.

[0045] Microcomputer 205 controls the operation of receiver 200. Microcomputer 205 is driven by the DC voltage supplied from power management unit 203 or the power stored in power storage unit 204. Microcomputer 205 controls power management unit 203 and discharges the power stored in power storage unit 204.

[0046] A variety of sensors 208, such as a thermal sensor, a temperature sensor, a light sensor, a humidity sensor, a vibration sensor, a magnetic sensor, etc., can be connected to the receiver 200. For example, a force sensor, a proximity sensor, a gas sensor, an acceleration sensor, a human presence sensor, an infrared sensor, an illuminance sensor, a flow sensor, a current sensor, a pressure sensor, etc. may also be connected to the receiver 200. The sensors connected to the receiver 200 are driven, for example, by a DC voltage supplied from the power management unit 203 or the power discharged from the power storage unit 204.

[0047] The microcomputer 205 continuously or intermittently monitors the voltage value at a predetermined part of the receiver 200, the status of the sensor 208 connected to the receiver 200, the information detected by the sensor 208, etc. The microcomputer 205 transmits the voltage value at a predetermined part of the receiver 200, the status of the sensor 208 connected to the receiver 200, the information detected by the sensor 208, etc. to the data transceiver 206 as digital data. Note that the sensor 208 may be built into the receiver 200.

[0048] The data transceiver 206 performs processes such as analog conversion of digital data supplied from the microcomputer 205 and modulation of analog data. Also, the data transceiver 206 performs processes such as demodulation of the data signal received by the antenna 201 and digitization of the demodulated data. The data transceiver 206 is driven, for example, by a DC voltage supplied from the power management unit 203 or the power discharged from the power storage unit 204.

[0049] <3.1 Configuration of Receiver> In this embodiment, the same antenna 201 is used for receiving the power supply signal in the 920 MHz band and for transmitting and receiving the data signal in the 2.4 GHz band. That is, the antenna 201 is shared between receiving the power supply signal in the 920 MHz band and transmitting and receiving the data signal in the 2.4 GHz band. The configuration of the receiver 200 when the antenna 201 is shared will be described below.

[0050] Figure 3 is a block diagram showing a configuration example of the receiver 200. The receiver 200 shown in Figure 3 includes an antenna 201, a microcomputer 205, a power system processing circuit 211, a data system processing circuit 212, matching circuits 213, 214, 215, and a switching circuit 216.

[0051] The power system processing circuit 211 is a circuit that performs processing related to voltage on the power supply signal received by the antenna 201, for example. The power system processing circuit 211 includes, for example, the rectifier 202, the power management unit 203, and the power storage unit 204 shown in Figure 2.

[0052] The data system processing circuit 212 is a circuit that performs processing related to the reception of the data signal received by the antenna 201, or performs processing related to the transmission of the data signal transmitted by the antenna 201, for example. The data system processing circuit 212 includes, for example, the data transceiver 206 shown in Figure 2.

[0053] The matching circuits 213, 214, 215 are circuits for adjusting the characteristic impedance of the antenna 201, the characteristic impedance of the power system processing circuit 211, and the characteristic impedance of the data system processing circuit 212. Specifically, for example, the matching circuits 213, 214 are designed such that the characteristic impedance of the antenna 201 and the characteristic impedance of the power system processing circuit 211 match. For example, the characteristic impedance of the antenna 201 and the characteristic impedance of the power system processing circuit 211 are matched using complex conjugates by the matching circuits 213, 214. For example, the characteristic impedance of the antenna 201 is designed to be R + jX, and the characteristic impedance of the power system processing circuit 211 is designed to be R - jX.

[0054] Also, for example, the matching circuits 213 and 215 are designed such that the characteristic impedance of the antenna 201 matches the characteristic impedance of the data system processing circuit 212. For example, the matching circuits 213 and 215 match the characteristic impedance of the antenna 201 and the characteristic impedance of the data system processing circuit 212 using complex conjugates. For example, the characteristic impedance of the antenna 201 is designed to be R + jX, and the characteristic impedance of the data system processing circuit 212 is designed to be R - jX.

[0055] The switching circuit 216 is, for example, an example of a branching section, and switches the connection path based on a signal from the microcomputer 205. The switching circuit 216 is connected to either the path connecting the antenna 201 and the power system processing circuit 211 or the path connecting the antenna 201 and the data system processing circuit 212. The microcomputer 205 outputs a switching instruction to the switching circuit 216 at a predetermined cycle. Specifically, for example, when the WPT system 1 is used in a daily space such as a building, the microcomputer 205 causes the switching circuit 216 to switch the connection at a cycle of about one minute. Also, for example, when the WPT system 1 is used in a production space such as a factory, the microcomputer 205 causes the switching circuit 216 to switch the connection at a cycle of about 5 mS. The transmitter 100 may transmit a power supply signal and a data signal based on the switching frequency of the switching circuit 216.

[0056] When the data signal is received by the data system processing circuit 212 while the switching circuit 216 is connecting the antenna 201 and the data system processing circuit 212, the microcomputer 205 may, for example, refrain from outputting a switching instruction to the switching circuit 216 until a response to the data signal is transmitted. As a result, when a data signal is received, a response to the received data signal is prioritized. When a response to the received data signal is transmitted, the microcomputer 205 resumes outputting switching instructions at a predetermined cycle.

[0057] The microcomputer 205 may switch the connection of the switching circuit 216 according to an instruction from the user.

[0058] According to the receiver 200 shown in FIG. 3, since the connection is switched by the switching circuit 216, even when the antenna 201 is shared, the signal can be accurately delivered to the power system processing circuit 211 and the data system processing circuit 212. Also, the data signal can be accurately transmitted from the antenna 201.

[0059] FIG. 4 is a block diagram showing another example of the configuration of the receiver 200. The receiver 200 shown in FIG. 4 includes an antenna 201, a microcomputer 205, a power system processing circuit 211, a data system processing circuit 212, matching circuits 213, 214, 215, and band-pass filters (BPFs) 217, 218.

[0060] The BPF 217 is a filter that passes radio waves in a predetermined frequency band and blocks other frequency bands. Specifically, for example, the BPF 217 is set to pass radio waves with a predetermined frequency width centered on 920 MHz so as to pass the power supply signal in the 920 MHz band to the subsequent stage.

[0061] The BPF 218 is a filter that passes radio waves in a predetermined frequency band and blocks other frequency bands. Specifically, for example, the BPF 218 is set to pass radio waves with a predetermined frequency width centered on 2.4 GHz so as to pass the data signal in the 2.4 GHz band to the subsequent stage.

[0062] According to the receiver 200 shown in FIG. 4, since only the signals of the corresponding frequencies are output to the subsequent stage by the BPFs 217 and 218, even when the antenna 201 is shared, the signal can be accurately delivered to the power system processing circuit 211 and the data system processing circuit 212. Also, the data signal can be accurately transmitted from the antenna 201.

[0063] Note that the BPF attached to the receiver 200 is not limited to two. The BPF 217 does not have to be attached. FIG. 5 is a block diagram showing another example of the configuration of the receiver 200. In FIG. 5, the BPF 218 is attached, but the BPF 217 is not attached. For example, generally, the intensity of the power supply signal is greater than that of the data signal. Therefore, even if a data signal enters the power system processing circuit 211, no significant influence occurs. Note that, for example, the matching circuit 214 may be adjusted so that the influence of signals other than the power supply signal is filtered.

[0064] FIG. 6 is a block diagram showing another example of the configuration of the receiver 200. The receiver 200 shown in FIG. 6 includes an antenna 201, a microcomputer 205, a power system processing circuit 211, a data system processing circuit 212, matching circuits 213, 214, 215, and a circulator 219.

[0065] As a use case of the receiver 200 shown in FIG. 6, the receiver 200 may transmit a data signal while receiving a power supply signal. That is, at this time, for example, the receiver 200 does not receive a data signal. The circulator 219 is, for example, an example of a branching unit, and supplies the power supply signal received by the antenna 201 to the power system processing circuit 211. Further, the circulator 219 supplies the data signal generated by the data system processing circuit 212 to the antenna 201. Further, even if an analog signal is generated in the power system processing circuit 211, the circulator 219 suppresses the supply of the signal to the antenna 201. Thus, according to the receiver 200 shown in FIG. 6, since the supply destination of the power supply signal and the data signal is set by the circulator 219, even when the antenna 201 is shared, it is possible to transmit the data signal from the antenna 201 while receiving the power supply signal. In this way, by ensuring the isolation between the power supply signal and the data signal, it becomes possible to simultaneously perform the reception of the power supply signal and the transmission of the data signal at the antenna 201.

[0066] Note that the configuration of the receiver 200 is not limited to the configurations shown in FIGS. 3 to 6. For example, the branching unit is not limited to the switching circuit 216 and the circulator 219. Specifically, for example, instead of the switching circuit 216 shown in FIG. 3, a diplexer that distributes the received signal into signals in two frequency bands may be attached. Also, instead of the circulator 219 shown in FIG. 6, a directional coupler or an isolator may be attached. Further, the BPFs shown in FIGS. 4 and 5 may be LPFs, HPFs, stubs, etc.

[0067] Also, the matching circuits 213, 214, 215 do not necessarily have to be provided. For example, when the characteristic impedance of the antenna 201 matches the characteristic impedance of the power system processing circuit 211 by the matching circuit 214, the matching circuit 213 is unnecessary. Also, for example, when the characteristic impedance of the antenna 201 matches the characteristic impedance of the data system processing circuit 212 by the matching circuit 215, the matching circuit 213 is unnecessary. Also, for example, when the characteristic impedance of the antenna 201 matches the characteristic impedance of the power system processing circuit 211 and the characteristic impedance of the antenna 201 matches the characteristic impedance of the data system processing circuit 212 by the matching circuit 213, the matching circuits 214, 215 are unnecessary. Also, for example, when the characteristic impedance of the antenna 201 is designed to match the characteristic impedance of the power system processing circuit 211 and the characteristic impedance of the antenna 201 matches the characteristic impedance of the data system processing circuit 212, the matching circuits 213, 214, 215 are unnecessary.

[0068] <3.2 Structure of Receiver Horizontal Type> FIG. 7 is a schematic diagram showing an example of the structure of the receiver 200. The receiver 200 shown in FIG. 7 has, for example, a cylindrical shape with a substantially rectangular cross section. The receiver 200 has an upper surface portion, a lower surface portion, and side surface portions. The upper surface portion represents the portion located on the upper surface in FIG. 7. The lower surface portion represents the portion located on the lower surface in FIG. 7. The side surface portions represent the portions located on the side surfaces in FIG. 7. The upper surface portion and the lower surface portion are arranged to face each other. In the receiver 200 shown in FIG. 7, the upper surface portion and the lower surface portion are arranged substantially parallel to each other. The upper surface portion and the lower surface portion do not necessarily have to be arranged substantially parallel to each other. Also, the upper surface portion, the lower surface portion, and the side surface portions may be flat, curved, or a combination thereof, either wholly or partially.

[0069] The receiver 200 has, for example, an antenna 201, a circuit section 220, and a sensor 208.

[0070] The antenna 201 has a longitudinal direction and a lateral direction and has a predetermined height. For example, the antenna 201 has a width of 10 mm in the lateral direction, a width of 30 mm in the longitudinal direction, and a height of 8 mm. The width of 30 mm in the longitudinal direction is, for example, about one-tenth of the wavelength of a signal in the 920 MHz band where reception is assumed. Note that the size of the antenna 201 is not limited to this and may be increased or decreased within a predetermined range. The antenna 201 may be treated as a loop antenna or an inverted-F antenna.

[0071] The antenna 201 includes a first conductor 2011 and a second conductor 2012. The first conductor 2011 is formed on the upper surface portion of the receiver 200 shown in FIG. 7. The first conductor 2011 is realized, for example, by a conductive layer formed on a PCB. The conductive layer formed on the PCB is realized, for example, by a copper foil.

[0072] The second conductor 2012 is realized by, for example, a conductive plate that constitutes the lower surface portion and both side surface portions of the receiver 200 shown in FIG. 7. The conductive plate is made of, for example, a metal plate such as copper or aluminum. The second conductor 2012 is formed by bending, for example, a single conductive plate. More specifically, for example, a single copper plate is bent to have a substantially U-shaped (substantially U-shaped or substantially C-shaped) cross-section. In the bending process, for example, a mold can be used to plastically process a copper plate or the like. The first conductor 2011 and the second conductor 2012 are connected, for example, by soldering the second conductor 2012 to a PCB.

[0073] The circuit section 220 is formed on the upper surface portion of the receiver 200 shown in FIG. 7. The circuit section 220 is mounted on, for example, a PCB. The circuit section 220 includes a rectifier 202, a power management section 203, a power storage section 204, a microcontroller 205, and a data transceiver 206. Further, the circuit section 220 may include, for example, matching circuits 213, 214, 215 and a switching circuit 216. Further, the circuit section 220 may include BPFs 217, 218. In the receiver 200 shown in FIG. 7, the slit is formed on the upper surface portion. In FIG. 7, the circuit section 220 is mounted in the spatial direction on the upper surface portion. The circuit section 220 may be mounted in the direction of the lower surface portion on the upper surface portion.

[0074] A slit (gap) is formed near the region where the rectifier 202 is installed in the first conductor 2011. A feeder (not shown) is connected to the slit. The power supply signal or data signal received by the antenna 201 is supplied via the feeder to, for example, the switching circuit 216 shown in FIG. 3. Also, the power supply signal or data signal received by the antenna 201 is supplied via the feeder to, for example, the BPFs 217, 218 shown in FIG. 4. Also, the power supply signal or data signal received by the antenna 201 is supplied via the feeder to, for example, the power system processing circuit 211 and the BPF 218 shown in FIG. 5. Also, the power supply signal or data signal received by the antenna 201 is supplied via the feeder to, for example, the power system processing circuit 211 and the data system processing circuit 212 shown in FIG. 6.

[0075] The sensor 208 is, for example, a sensor module having a predetermined size. The sensor 208 is, for example, a magnetic sensor. The sensor 208 is connected to the circuit unit 220 by connecting to wiring formed on the PCB. The sensor 208 is disposed at a position penetrating the lower surface portion on the back side of the lower surface portion with respect to the upper surface portion. The distance between the sensor 208 and the lower surface portion is based on, for example, the position where the state of the device is measured by the sensor 208 when the receiver 200 is attached to the device. Note that the sensor 208 does not necessarily have to be disposed so as to penetrate the lower surface portion. For example, wiring may be allowed to crawl on the surfaces of the first conductor 2011 and the second conductor 2012, and the sensor 208 may be disposed at a position on the back side of the lower surface portion with respect to the upper surface portion. At this time, for example, the circuit unit 220 and the sensor 208 can be mounted on a rigid-flex substrate. By installing a ferrite bead or an inductor at the connection portion between the rigid portion and the flex portion of the rigid-flex substrate, it is possible to suppress the influence on the antenna 201 of the flex portion.

[0076] Note that the structure of the receiver 200 is not limited to that shown in FIG. 7. For example, FIG. 7 shows a case where the circuit unit 220 is attached in the spatial direction of the upper surface portion. The lower surface portion may be realized by a PCB, and the first conductor 2011 may be formed on the lower surface portion. At this time, the circuit unit 220 is mounted on the PCB of the lower surface portion. The circuit unit 220 may be mounted in the spatial direction of the lower surface portion or in the upper surface portion direction of the lower surface portion. The second conductor 2012 is realized, for example, by a conductive plate constituting the upper surface portion and both side surface portions. Also, the side surface portion may be realized by a PCB, and the first conductor 2011 may be formed on the side surface portion. At this time, the circuit unit 220 is mounted on the PCB of the side surface portion. The circuit unit 220 may be mounted in the spatial direction of the side surface portion or in the inner direction of the cylindrical shape of the side surface portion. The second conductor 2012 is realized, for example, by a conductive plate constituting the upper surface portion, the lower surface portion, and the other side surface portion.

[0077] The receiver 200 may be attached with a shielding material 252 for reflecting radio waves. The shielding material 252 is made of, for example, a conductive material, such as a metal. The shielding material 252 is formed so as to cover the circuit portion 220 while avoiding the slit to which the rectifier 202 is connected.

[0078] FIG. 8 shows an example of a schematic diagram of the receiver 200 when the shielding material 252 is attached. The shielding material 252 is attached, for example, in the spatial direction on the upper surface portion. In FIG. 8, the case where the shielding material 252 covers the entire circuit portion 220 is shown, but the shielding material 252 may cover a part of the circuit portion 220. Further, the shielding material 252 may cover a plurality of locations instead of covering only one location of the circuit portion 220.

[0079] FIG. 9 shows another example of a schematic diagram of the receiver 200 when the shielding material 252 is attached. The shielding material 252 is attached, for example, in the direction of the lower surface portion on the upper surface portion. In FIG. 9, the case where the shielding material 252 covers the entire back side of the upper surface portion is shown, but the shielding material 252 may cover a part of the back side of the upper surface portion. Further, the shielding material 252 may cover a plurality of locations instead of covering only one location of the back side of the upper surface portion.

[0080] <3.3 Structure of Receiver Vertical Type> FIGS. 10 and 11 are schematic diagrams showing an example of the structure of the receiver 200a. FIG. 10 is a schematic diagram showing an example of the structure of the receiver 200a when viewed from a predetermined direction. FIG. 11 is a schematic diagram showing an example of the structure of the receiver 200a shown in FIG. 10 when viewed from the back.

[0081] The receiver 200a shown in FIGS. 10 and 11 has, for example, a cylindrical shape with a substantially rectangular cross-section that is closed by a substrate. The receiver 200a has an upper surface portion, a lower surface portion, and side surface portions. The upper surface portion represents the portion located on the upper surface in FIGS. 10 and 11. The lower surface portion represents the portion located on the lower surface in FIGS. 10 and 11. The side surface portions represent the portions located on the side surfaces in FIGS. 10 and 11. The upper surface portion and the lower surface portion are arranged to face each other. A slit (gap) is formed in one of the side surface portions. In the receiver 200a shown in FIGS. 10 and 11, the upper surface portion and the lower surface portion are arranged substantially parallel to each other. The upper surface portion and the lower surface portion do not necessarily have to be arranged substantially parallel to each other. Also, the upper surface portion, the lower surface portion, and the side surface portions may be flat, curved, or a combination thereof, either wholly or in part.

[0082] The receiver 200a has, for example, an antenna 201a, a back surface portion 209a, a circuit portion 220a, and a sensor 208.

[0083] The antenna 201a has a longitudinal direction and a lateral direction and has a predetermined height. For example, the antenna 201a has a width of 10 mm in the lateral direction, a width of 30 mm in the longitudinal direction, and a height of 8 mm. The width of 30 mm in the longitudinal direction is, for example, approximately the same length as one-tenth of the wavelength of a signal in the 920 MHz band where reception is assumed. Note that the size of the antenna 201a is not limited to this and may be increased or decreased within a predetermined range. The antenna 201a may be treated as a loop antenna or an inverted-F antenna.

[0084] The antenna 201a is realized, for example, by a conductor having an annular shape. The antenna 201a is realized, for example, by a conductive plate made of a metal such as copper or aluminum. The antenna 201a is formed, for example, by bending a single conductive plate. More specifically, for example, a single copper plate is bent to have a substantially rectangular shape in a cross-sectional view. In the bending process, for example, a mold may be used to plastically process the copper plate or the like.

[0085] The circuit unit 220a is formed on the back surface portion 209a shown in FIGS. 10 and 11. The circuit unit 220a includes a rectifier 202, a power management unit 203, a power storage unit 204, a microcomputer 205, and a data transceiver 206. Further, the circuit unit 220a may include, for example, matching circuits 213, 214, 215 and a switching circuit 216. Further, the circuit unit 220 may include BPFs 217, 218. The circuit unit 220a may be formed on both surfaces of the back surface portion 209a or may be formed on one surface thereof.

[0086] In FIGS. 10 and 11, the case where the sensor 208 is mounted as a module is shown, but the sensor 208 may be formed as a circuit on the back surface portion 209a. That is, the sensor 208 may be surface-mounted on the back surface portion 209a.

[0087] A feeder (not shown) is connected to the gap on the side surface portion of the receiver 200a. The power supply signal or data signal received by the antenna 201a is supplied via the feeder to, for example, the switching circuit 216 shown in FIG. 3. Further, the power supply signal or data signal received by the antenna 201a is supplied via the feeder to, for example, the BPFs 217, 218 shown in FIG. 4. Further, the power supply signal or data signal received by the antenna 201a is supplied via the feeder to, for example, the power system processing circuit 211 and the BPF 218 shown in FIG. 5. Further, the power supply signal or data signal received by the antenna 201a is supplied via the feeder to, for example, the power system processing circuit 211 and the data system processing circuit 212 shown in FIG. 6.

[0088] The back surface portion 209a is realized by a substrate such as a PCB, for example. The back surface portion 209a is arranged so as to close the cylindrical portion of the antenna 201a, for example. The back surface portion 209a may close the entire cylindrical portion of the antenna 201a or may close a part of the cylindrical portion, for example.

[0089] Figs. 12 and 13 are schematic diagrams showing a configuration example of the back surface portion 209a. Fig. 12 is a schematic diagram showing a configuration example of the back surface portion 209a on the side that does not contact the antenna 201a. Fig. 13 is a schematic diagram showing a configuration example of the back surface portion 209a on the side that contacts the antenna 201a. The hatched portions in Figs. 12 and 13 represent insulators. That is, the hatching represents a region where no conductive material exists. In the back surface portion 209a, the conductive material is used in a limited region. For example, in the back surface portion 209a, the conductive material is used only for circuits, metal wires for connecting circuits, antenna elements, a part of the ground, vias, etc. In the back surface portion 209a, the insulator represented by the hatched portion may be cut out to be in a state of nothing.

[0090] In Figs. 10 and 11, in the back surface portion 209a, the portion where the sensor 208 is attached protrudes from the antenna 201a. However, the protruding portion is not limited to the portion where the sensor 208 is attached. The back surface portion 209a may protrude in the direction of the upper surface portion, the side surface portion, the lower surface portion, and a combination direction of at least any of these. That is, the back surface portion 209a may be larger than the cross section of the antenna 201a. A circuit portion 220a may be mounted in a region protruding from the antenna 201a in the back surface portion 209a.

[0091] The sensor 208 is, for example, a sensor module having a predetermined size. The sensor 208 is, for example, a magnetic sensor and is connected to wiring formed on a substrate. The receiver 200a can be expected to have a reception efficiency approximately the same as that of the receiver 200.

[0092] A shielding material for reflecting radio waves may be attached to the receiver 200a. The shielding material is made of, for example, a conductive material, for example, metal. The shielding material is attached so as to cover, for example, a part of the back surface portion 209a. Specifically, the shielding material is attached so as to cover, for example, the circuit portion 220a. The shielding material may be attached to the antenna 201a side of the back surface portion 209a or to the space side.

[0093] <3.4 Installation of Receiver The receivers 200 and 200a are installed, for example, on a predetermined indoor device. Here, the case where the receiver 200 is installed on a device will be described as an example. More specifically, for example, the receiver 200 is attached to the metal housing of the driving unit used indoors. Note that the attachment destination of the receiver 200 is not limited to the driving unit. For example, the receiver 200 may be attached to a predetermined frame. Also, the attachment destination of the receiver 200 is not limited to a metal housing. For example, the receiver 200 may be attached to a non-metal housing.

[0094] When the receiver 200 is attached to the metal housing of the driving unit, for example, it is stored in a housing 250 for attachment to the metal housing. The housing 250 is realized by a thermoplastic resin such as polycarbonate resin, for example.

[0095] FIG. 14 is a diagram showing an example of a schematic view of the receiver 200 stored in the housing 250. The receiver 200 is attached, for example, so that one surface of the housing 250 is in contact with the metal housing of the driving unit.

[0096] The housing 250 for storing the receiver 200 is not limited to being entirely realized by resin. At least one surface of the housing 250 may be realized by a conductive material, for example, metal.

[0097] FIG. 15 is a diagram showing an example of a schematic diagram of the receiver 200 when one surface of the housing 250 is realized by metal. FIG. 16 is a diagram showing an example of a schematic diagram of a cross-sectional view of the A-A cross-section of FIG. 15. In the examples shown in FIGS. 15 and 16, the lower surface portion of the antenna 201 and the metal portion 251 are in physical contact. Note that the sensor 208 is not shown in FIGS. 15 and 16. In FIGS. 15 and 16, when the sensor 208 is shown, for example, a hole is formed in the metal portion 251, and the sensor 208 is connected from the hole. Further, the portion where the metal portion 251 physically contacts is not limited to the lower surface portion. The metal portion 251 may be located, for example, on the side surface portion of the housing 250 and may be in physical contact with the side surface portion of the antenna 201. Further, the metal portion 251 may be located, for example, on the upper surface portion of the housing 250 and may be in physical contact with the upper surface portion of the antenna 201.

[0098] The metal portion 251 does not have to be in physical contact with the antenna 201. For example, when the metal portion 251 is the lower surface portion of the housing 250, 251 may be in functional or electrical contact with the lower surface portion of the antenna 201. Further, for example, when the metal portion 251 is the side surface portion of the housing 250, the metal portion 251 may be in functional or electrical contact with the side surface portion of the antenna 201. Further, for example, when the metal portion 251 is the upper surface portion of the housing 250, the metal portion 251 may be in functional or electrical contact with the upper surface portion of the antenna 201.

[0099] The metal portion 251 may be shared with one surface of the antenna 201. For example, in FIGS. 15 and 16, the metal portion 251 may be integrated with the lower surface portion of the antenna 201. Similarly, in FIGS. 15 and 16, when the metal portion 251 is the side surface portion of the housing 250, the metal portion 251 may be integrated with the side surface portion of the antenna 201. Further, in FIGS. 15 and 16, when the metal portion 251 is the upper surface portion of the housing 250, the metal portion 251 may be integrated with the upper surface portion of the antenna 201.

[0100] As described above, in the above embodiment, the receiver 200 includes an antenna 201, a rectifier circuit 202, and a processing circuit (data system processing circuit 212). The antenna 201 has an annular shape and includes a conductor having a predetermined width and a substrate. The rectifier circuit 202 is installed on the substrate and rectifies the power supply signal received by the antenna 201. The processing circuit 212 is installed on the substrate and executes processing for transmitting a data signal via the antenna 201. Thereby, the receiver 200 can receive a power supply signal and transmit a data signal using a single antenna 201. That is, the antenna 201 is shared for receiving the power supply signal and transmitting the data signal, and an antenna for transmitting the data signal becomes unnecessary.

[0101] Therefore, according to the receiver 200 according to the present embodiment, the size of the power receiver used in the wireless power supply system can be reduced.

[0102] Also, in the above embodiment, the receiver 200 includes a branching unit that is installed on the substrate, branches the signal received by the antenna 201, and outputs the branched signal to the rectifier circuit 202 or the processing circuit 212. Thereby, the receiver 200 can accurately receive the power supply signal and transmit and receive the data signal using a single antenna 201.

[0103] Also, in the above embodiment, the matching circuits 213, 214, 215 are installed on the substrate and perform impedance matching between the antenna 201 and the rectifier circuit 202 and impedance matching between the antenna 201 and the processing circuit 212. Thereby, it is possible to suppress noise that may occur in the receiver 200.

[0104] Also, in the above embodiment, the receiver 200 includes a switching circuit 216 that switches the connection between the antenna 201 and the rectifier circuit 202 and the connection between the antenna 201 and the processing circuit 212 as a branching unit. Thereby, even when the antenna 201 is shared, the signal can be accurately delivered to the rectifier 202 and the data system processing circuit 212.

[0105] Also, in the above embodiment, the receiver 200 includes, as a branching section, a circulator 219 that supplies the power supply signal received by the antenna 201 to the rectifier circuit 202 and supplies the data signal generated by the processing circuit 212 to the antenna 201. As a result, in the antenna 201, it becomes possible to simultaneously receive the power supply signal and transmit the data signal.

[0106] Also, in the above embodiment, the receiver 200 includes band - pass filters 217 and 218 that pass signals of corresponding frequencies between the antenna 201 and the rectifier circuit 202, between the antenna 201 and the processing circuit 212, or both. As a result, even when sharing the antenna 201, signals can be accurately delivered to the rectifier 202 and the data - system processing circuit 212.

[0107] Also, in the above embodiment, the annular - shaped antenna 201 is formed by a conductor and a substrate. As a result, it becomes possible to efficiently manufacture the antenna 201.

[0108] Also, in the above embodiment, the receiver 200a includes an antenna 201a, a substrate (rear surface portion 209a), a rectifier circuit 202, and a processing circuit (data - system processing circuit 212). The antenna 201a is made of a conductor having a predetermined width and has an annular shape. The substrate 209a is arranged so as to close the cylindrical portion of the annular antenna 201a. The rectifier circuit 202 is installed on the substrate 209a and rectifies the power supply signal received by the antenna 201a. The processing circuit 212 is installed on the substrate 209a and executes processing for transmitting and receiving data signals via the antenna 201a. As a result, the receiver 200a can use a single antenna 201a to receive the power supply signal and transmit and receive the data signal. That is, an antenna for transmitting and receiving data signals becomes unnecessary.

[0109] In the above-described embodiment, the receiver 200a is installed on a substrate and includes a branching unit that branches the signal received by the antenna 201a and outputs the branched signal to the rectifier circuit 202 or the processing circuit 212. As a result, the receiver 200 can accurately perform reception of the power supply signal and transmission and reception of the data signal using a single antenna 201.

[0110] In the above-described embodiment, the matching circuits 213, 214, and 215 are installed on the substrate 209a and perform impedance matching between the antenna 201a and the rectifier circuit 202 and impedance matching between the antenna 201a and the processing circuit 212. As a result, it is possible to suppress noise that may occur within the receiver 200.

[0111] In the above-described embodiment, the receiver 200a includes a switching circuit 216 as a branching unit that switches the connection between the antenna 201a and the rectifier circuit 202 and the connection between the antenna 201a and the processing circuit 212. As a result, even when the antenna 201a is shared, the signal can be accurately delivered to the rectifier 202 and the data system processing circuit 212.

[0112] In the above-described embodiment, the receiver 200a includes a circulator 219 as a branching unit that supplies the power supply signal received by the antenna 201a to the rectifier circuit 202 and supplies the data signal generated by the processing circuit 212 to the antenna 201a. As a result, it is possible to simultaneously perform reception of the power supply signal and transmission of the data signal at the antenna 201a.

[0113] In the above-described embodiment, the receiver 200a includes band-pass filters 217 and 218 that pass signals of corresponding frequencies between the antenna 201a and the rectifier circuit 202, between the antenna 201a and the processing circuit 212, or both. As a result, even when the antenna 201a is shared, the signal can be accurately delivered to the rectifier 202 and the data system processing circuit 212.

[0114] <4 Modification Example> In the above-described embodiment, the case where the receivers 200 and 200a share the antenna 201 by adopting the configurations described with reference to FIGS. 3 to 6 has been described. However, the device for sharing the antenna 201 between the power system processing circuit 211 and the data system processing circuit 212 is not limited to that described with reference to FIGS. 3 to 6. In the receiver 200, the feeder for supplying the power supply signal to the power system processing circuit 211 and the feeder for supplying the data signal to the data system processing circuit 212 may be arranged in physically separated regions.

[0115] FIG. 17 is a schematic diagram showing another example of the structure of the receiver 200. The receiver 200 shown in FIG. 17 has a feeder for supplying a power supply signal in the 920 MHz band near one end of the antenna 201, and a feeder for supplying a data signal in the 2.4 GHz band near the other end of the antenna 201. The feeder is connected to, for example, a conductor on which the circuit unit 220 is formed. When one feeder is selected, the slit to which the other feeder is attached may or may not be electrically conductive.

[0116] FIG. 18 is a schematic diagram showing another example of the structure of the receiver 200a. The receiver 200a shown in FIG. 18 has a feeder for supplying a power supply signal in the 920 MHz band near one end of the antenna 201, and a feeder for supplying a data signal in the 2.4 GHz band near the other end of the antenna 201.

[0117] Also, in the above-described embodiment, the receivers 200 and 200a may have a mechanism for accurately measuring the DC voltage output from the rectifier 202 and received by the antenna 201. The value of the DC voltage supplied from the rectifier 202 to the power management unit 203 varies according to the variation in the impedance within the circuit including the power management unit 203 and the power storage unit 204. Therefore, it is difficult to accurately measure the value of the DC voltage supplied from the rectifier 202 to the power management unit 203.

[0118] Therefore, in the present embodiment, the output of the rectifier 202 is supplied to a resistor disconnected from the subsequent load, and the voltage across the resistor is measured.

[0119] FIG. 19 is a block diagram showing a configuration example of the receiver 200. The receiver 200 shown in FIG. 19 includes an antenna 201, a rectifier 202, a power management unit 203, a power storage unit 204, a microcomputer 205, a data transceiver 206, a switching circuit 221, a resistor 222, and a measurement unit 223.

[0120] The switching circuit 221 switches the connection path based on a signal from the microcomputer 205. The switching circuit 221 is connected to either a path connecting the rectifier 202 and the power management unit 203 or a path connecting the rectifier 202 and the resistor 222. The microcomputer 205 outputs a switching instruction to the switching circuit 221 at a predetermined timing. Specifically, for example, in an initial state where a power supply signal is supplied, for example, when the charging of the power storage unit 204 or a capacitor in the circuit is not complete, the switching circuit 221 connects the rectifier 202 and the power management unit 203. When the charging of the power storage unit 204 or a capacitor in the circuit is complete, the microcomputer 205 causes the switching circuit 221 to switch the connection and connects the rectifier 202 and the resistor 222. The microcomputer 205 may, for example, monitor the voltage of the power storage unit 204 and cause the switching circuit 221 to switch the connection and connect the rectifier 202 and the resistor 222 when the voltage is equal to or higher than a predetermined threshold. Further, the microcomputer 205 may, for example, monitor the voltage of the power storage unit 204 and cause the switching circuit 221 to switch the connection and connect the rectifier 202 and the resistor 222 when the voltage trend is not decreasing.

[0121] The resistor 222 is, for example, a resistor having a predetermined resistance value. The resistance value is, for example, 100 ohms. Note that the resistor 222 may be a plurality of resistors having different resistance values.

[0122] The measurement unit 223 measures the voltage across the terminals of the resistor. The microcontroller 205 may display the measured voltage on a display provided in the receiver 200, or may transmit it to the transmitter 100 or the first information processing apparatus 300 via the data transceiver 206. When the resistor 222 is a plurality of resistors with different resistance values, the measurement unit 223 measures the voltage for at least any one of the resistors. The microcontroller 205 may display on the display, together with the measured voltage, the voltage measured using which resistor and in what procedure, or may transmit it to the transmitter 100 or the first information processing apparatus 300.

[0123] By supplying the output of the rectifier 202 to a resistor disconnected from the subsequent load and measuring the voltage across the resistor with the measurement unit 223, the receiver 200 can measure the supply power of the power supply signal in real time. Therefore, the user can recognize an area with weak supply power within the office or factory space based on the measurement result of the receiver 200. Also, the receiver 200 can measure the supply power in real time even after a predetermined device is installed in the office or factory. Further, by accumulating the actual power measurement results with respect to the prior simulation results, it becomes possible to improve the accuracy of the prior simulation.

[0124] Note that the resistor 222 and the measurement unit 223 may be a predetermined device driven by current. Specifically, for example, the resistor 222 and the measurement unit 223 may be replaced with an LED. The light intensity of the LED changes according to the magnitude of the supplied current. Therefore, the user can grasp the supply power in the area where the receiver 200 is installed based on the light intensity of the LED.

[0125] Also, in the above-described embodiment, the receiver 200 may monitor the voltage of the power storage unit 204 and vary the intensity of the power supply signal transmitted from the transmitter 100 based on the magnitude of the voltage. Specifically, for example, when the voltage is lower than a predetermined threshold value and the trend of the voltage is decreasing, the receiver 200 transmits an instruction to the transmitter 100 or the first information processing device 300 to increase the intensity of the power supply signal transmitted from the transmitter 100. Also, for example, when the voltage is higher than a predetermined threshold value and the trend of the voltage is not decreasing, the receiver 200 transmits an instruction to the transmitter 100 or the first information processing device 300 to decrease the intensity of the power supply signal transmitted from the transmitter 100.

[0126] As a result, the transmitter 100 can suppress the occurrence of a failure because it reduces the output and transmits the power supply signal. Also, in the receiver 200, it becomes possible to respond flexibly even when power is suddenly required. Also, the transmitter 100 can operate in an energy-saving mode suitable according to the purpose or application.

[0127] Also, for example, when the voltage supplied by the received power supply signal is lower than a predetermined value, the receiver 200 may transmit an instruction to the transmitter 100 or the first information processing device 300 to increase the intensity of the power supply signal transmitted from the transmitter 100. Also, for example, when the power consumption in the receiver 200 is higher than a predetermined value or the trend of the power consumption is increasing, the receiver 200 may transmit an instruction to the transmitter 100 or the first information processing device 300 to increase the intensity of the power supply signal transmitted from the transmitter 100. Also, for example, the receiver 200 may transmit an instruction to the transmitter 100 or the first information processing device 300 to increase the intensity of the power supply signal transmitted from the transmitter 100 according to the operable time based on the power consumption by the sensor 208 attached to the receiver 200.

[0128] The transmitter 100 receives information regarding the received power from the receiver 200 installed in space. The transmitter 100 grasps the intensity distribution of the received power based on the information regarding the received power. The transmitter 100 evaluates the intensity distribution of the transmitted power, and if the variation is larger than a preset value, the intensity of the power supply signal may be increased.

[0129] Also, in the above embodiment, the receiver 200 may monitor the power storage status of the receiver 200 by observing the voltage accumulated in the receiver 200 not only in a short period (several msec to several sec) but also in a long period (about several minutes to one hour). For example, the receiver 200 measures the power supply voltage in a short period and a long period. The power supply voltage is, for example, the voltage of the power storage unit 204. The receiver 200 stores, for example, the voltage value measured in a short period in a ring buffer for short periods and stores the voltage value measured in a long period in a ring buffer for long periods. The receiver 200 linearly approximates the voltage value read at a predetermined position in the ring buffer for long periods using a predetermined statistical method (for example, the least squares method, etc.). The receiver 200 calculates the slope of the approximate curve and issues a notification to the transmitter 100 or the first information processing device 300 based on the calculated slope.

[0130] In the environment where the WPT system 1 is used, there may be a case where the received power is slightly insufficient for the power consumption on the receiver 200 side. In this case, the power supply voltage gradually decreases little by little over a long time, and there is a case where it eventually becomes inoperable. In such a case, in the measurement of the voltage value in a short period, it is determined that there is "no change" and it is difficult to detect. For the user, according to the result of the short-period measurement, it should operate normally, but since it stops operating like a time bomb, it is desirable to be able to detect it at an early stage during startup or steady operation. According to this embodiment, since the voltage value is measured in a long period, it is possible to detect at an early stage the state where the power supply voltage has been decreasing over a long period.

[0131] Further, the receiver 200 may monitor the power storage status of the receiver 200 by measuring the difference between the DC voltage output from the rectifier 202 and the voltage of the power storage unit 204 over a long period of time. Specifically, for example, the receiver 200 measures the DC voltage output from the rectifier 202 and the voltage of the power storage unit 204 at a predetermined period. The receiver 200 samples the difference between the DC voltage and the power supply voltage. The receiver 200 calculates the time average of the difference and determines whether the calculated time average value falls below a threshold over a long time. When the time average value falls below the threshold for a certain period, the receiver 200 notifies the transmitter 100 or the first information processing device 300 to that effect.

[0132] Also, in the above embodiment, the receiver 200 may have an interface accessible to the user. The user accesses the receiver 200 attachable to the device via the interface. The interface includes, for example, buttons, LEDs, or a combination thereof connected to the circuit unit 220.

[0133] Also, in the above embodiment, the case where the antenna 201 has an annular shape has been described as an example. However, the shape of the antenna 201 is not limited to that shown above.

[0134] <5 Basic Hardware Configuration of a Computer> FIG. 20 is a block diagram showing the basic hardware configuration of a computer 90. The computer 90 includes at least a processor 91, a main storage device 92, an auxiliary storage device 93, and a communication IF 99 (interface). These are electrically connected to each other by a bus.

[0135] The processor 91 is hardware for executing an instruction set described in a program. The processor 91 is composed of an arithmetic unit, registers, peripheral circuits, and the like.

[0136] The main memory device 92 is for temporarily storing programs and data processed by programs and the like. For example, it is a volatile memory such as DRAM (Dynamic Random Access Memory).

[0137] The auxiliary storage device 93 is a storage device for storing data and programs. For example, it includes flash memory, HDD (Hard Disc Drive), magneto-optical disk, CD-ROM, DVD-ROM, semiconductor memory, and the like.

[0138] The communication IF 99 is an interface for inputting and outputting signals for communicating with other computers via a network using wired or wireless communication standards. The network is composed of various mobile communication systems constructed by the Internet, LAN, wireless base stations, etc. For example, the network includes 3G, 4G, 5G mobile communication systems, LTE (Long Term Evolution), wireless networks (e.g., Wi-Fi (registered trademark)) that can be connected to the Internet by a predetermined access point, etc. When connecting wirelessly, communication protocols such as Z-Wave (registered trademark), ZigBee (registered trademark), Bluetooth (registered trademark), etc. are included. When connecting wired, the network also includes those directly connected by a USB (Universal Serial Bus) cable, etc.

[0139] Note that all or part of each hardware configuration can be distributed and provided to a plurality of computers 90, and the computers 90 can be virtually realized by connecting to each other via a network. In this way, the computer 90 is a concept that includes not only a single housing and the computer 90 housed in a case but also a virtualized computer system.

[0140] <Basic functional configuration of computer 90> The functional configuration of a computer realized by the basic hardware configuration of computer 90 shown in FIG. 20 will be described. The computer includes at least functional units of a control unit, a storage unit, and a communication unit.

[0141] Note that the functional units included in computer 90 can also be realized by dispersing all or part of each functional unit among a plurality of computers 90 interconnected by a network. Computer 90 is a concept that includes not only a single computer 90 but also a virtualized computer system.

[0142] The control unit is realized by the processor 91 reading out various programs stored in the auxiliary storage device 93 and expanding them in the main storage device 92, and executing processing according to the programs. The control unit can realize a functional unit that performs various information processes according to the type of program. Thereby, the computer is realized as an information processing device that performs information processing.

[0143] The storage unit is realized by the main storage device 92 and the auxiliary storage device 93. The storage unit stores data, various programs, and various databases. Also, the processor 91 can secure a storage area corresponding to the storage unit in the main storage device 92 or the auxiliary storage device 93 according to the program. Further, the control unit can cause the processor 91 to execute addition, update, and deletion processing of the data stored in the storage unit according to various programs.

[0144] The database refers to a relational database and is for managing a set of data called a table, which is structurally defined by rows and columns, in association with each other. In a database, a table is called a table, a column of a table is called a column, and a row of a table is called a record. In a relational database, relationships between tables can be set and associated. Normally, each table is set with a column that serves as a key for uniquely identifying records, but setting a key for a column is not essential. The control unit can cause the processor 91 to add, delete, or update records in a specific table stored in the storage unit according to various programs.

[0145] The communication unit is realized by the communication IF 99. The communication unit realizes the function of communicating with other computers 90 via a network. The communication unit can receive information transmitted from other computers 90 and input it to the control unit. The control unit can cause the processor 91 to perform information processing on the received information according to various programs. Also, the communication unit can transmit the information output from the control unit to other computers 90.

[0146] As described above, some embodiments of the present disclosure have been explained, but these embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are to be included in the scope and gist of the invention, and also in the invention described in the claims and the equivalent scope thereof.

[0147] Also, in the above description, the "processor" is one or more processors. At least one processor is typically a microprocessor such as a CPU (Central Processing Unit), but may also be another type of processor such as a GPU (Graphics Processing Unit). At least one processor may be single-core or multi-core.

[0148] Also, at least one processor may be a processor in a broad sense such as a hardware circuit (e.g., FPGA (Field-Programmable Gate Array) or ASIC (Application Specific Integrated Circuit)) that performs part or all of the processing.

[0149] Also, in the above description, the expression such as "xxx table" may be used to describe the information from which the output can be obtained for the input. However, this information may be data of any structure, or a learning model such as a neural network that generates the output for the input. Therefore, "xxx table" can be referred to as "xxx information".

[0150] Also, in the above description, the configuration of each table is an example. One table may be divided into two or more tables, or all or part of two or more tables may be one table.

[0151] Also, in the above description, the "program" may be used as the subject to describe the process. However, since the program is executed by the processor to perform the defined process while appropriately using the storage unit and / or the interface unit, etc., the subject of the process may be the processor (or a device such as a controller having the processor, a microcomputer).

[0152] The program may be installed in a device such as a computer, or may be, for example, in a program distribution server or a computer-readable (e.g., non-transitory) recording medium. Also, in the following description, two or more programs may be realized as one program, or one program may be realized as two or more programs.

[0153] Also, in the above description, an identification number is used as the identification information for various objects. However, other types of identification information (e.g., an identifier including letters or symbols) may be adopted.

[0154] Also, in the above description, when describing without distinguishing the same type of elements, reference signs (or common signs among the reference signs) are used, and when describing by distinguishing the same type of elements, the identification numbers (or reference signs) of the elements may be used.

[0155] In the following description, control lines and information lines indicate those considered necessary for the description, and not necessarily all control lines and information lines are shown on the product. All components may be interconnected with each other.

[0156] The functions realized by the components described in this specification may be implemented in circuitry or processing circuitry including a general-purpose processor, an application-specific processor, an integrated circuit, ASICs (Application Specific Integrated Circuits), a CPU (a Central Processing Unit), a conventional circuit, and / or a combination thereof, programmed to realize the described functions. The processor includes transistors and other circuits and is regarded as circuitry or processing circuitry. The processor may be a programmed processor that executes a program stored in a memory. In this specification, circuitry, unit, and means are hardware programmed to realize the described functions or hardware that executes them. The hardware may be any hardware disclosed in this specification or any hardware known to be programmed or execute to realize the described functions. When the hardware is a processor regarded as a type of circuitry, the circuitry, means, or unit is a combination of hardware and software used to configure the hardware and / or the processor.

[0157] <Supplementary Note> The matters described in each of the above embodiments are appended below. (Supplementary Note 1) A receiver comprising: an annular antenna including a conductor having a predetermined width and a substrate; a rectifier circuit installed on the substrate for rectifying a power supply signal received by the antenna; and a processing circuit installed on the substrate for performing processing for transmitting a data signal via the antenna. (Appendix 2) The receiver according to (Appendix 1), further comprising a branching unit installed on the substrate for branching a signal received by the antenna and outputting the branched signal to the rectifier circuit or the processing circuit. (Appendix 3) The receiver according to (Appendix 1) or (Appendix 2), further comprising one or more matching circuits installed on the substrate for performing impedance matching between the antenna and the rectifier circuit and impedance matching between the antenna and the processing circuit. (Appendix 4) The receiver according to (Appendix 2), further comprising a switching circuit for switching the connection between the antenna and the rectifier circuit and the connection between the antenna and the processing circuit, the switching circuit serving as the branching unit. (Appendix 5) The receiver according to (Appendix 2), further comprising a circulator for supplying a signal received by the antenna to the rectifier circuit and supplying a signal generated by the processing circuit to the antenna, the circulator serving as the branching unit. (Appendix 6) The receiver according to any one of (Appendix 1) to (Appendix 5), further comprising a filter for passing a signal of a corresponding frequency between the antenna and the rectifier circuit, between the antenna and the processing circuit, or both. (Appendix 7) The receiver according to any one of (Appendix 1) to (Appendix 6), wherein the annular antenna is formed by the conductor and the substrate. (Appendix 8) A receiver comprising: an antenna made of a conductor having a predetermined width and having an annular shape; a substrate arranged to close a cylindrical portion of the annular antenna; a rectifier circuit installed on the substrate for rectifying a power supply signal received by the antenna; and a processing circuit installed on the substrate for performing processing for transmitting a data signal via the antenna. (Appendix 9) A receiver according to (Appendix 8), comprising a branching unit that is installed on a substrate, branches a signal received by an antenna, and outputs the branched signal to a rectifier circuit or a processing circuit. (Appendix 10) A receiver according to (Appendix 8) or (Appendix 9), comprising a substrate, an antenna, and one or more matching circuits for performing impedance matching between the antenna and a rectifier circuit and impedance matching between the antenna and a processing circuit. (Appendix 11) A receiver according to (Appendix 9), comprising a switching circuit that switches the connection between the antenna and the rectifier circuit and the connection between the antenna and the processing circuit as a branching unit. (Appendix 12) A receiver according to (Appendix 9), comprising a circulator that supplies a signal received by the antenna to the rectifier circuit and supplies a signal generated by the processing circuit to the antenna. (Appendix 13) A receiver according to any one of (Appendix 8) to (Appendix 12), comprising a filter that passes a signal of a corresponding frequency between the antenna and the rectifier circuit, between the antenna and the processing circuit, or both.

Explanation of Reference Signs

[0158] 1…WPT system 100…Transmitter 101…Oscillator 102…Transmitting antenna 103…Microcontroller 104…Data transceiver 105…Data transmission / reception antenna 200…Receiver 201…Receiving antenna 202…Rectifier 203…Power management unit 204…Power storage unit 205…Microcontroller 206…Data transceiver 300…First information processing device 400…Second information processing device

Claims

1. An annular antenna including a conductor having a predetermined width and a substrate, a rectifying circuit installed on the substrate for rectifying a power supply signal received by the antenna, a processing circuit installed on the substrate for performing processing to transmit or receive a data signal in a frequency band different from that of the power supply signal via the antenna, a switching circuit installed on the substrate for switching between a first connection between the antenna and the rectifying circuit and a second connection between the antenna and the processing circuit, and a control unit that outputs a switching instruction to the switching circuit so as to switch the connection to the first connection or the second connection at a predetermined period, and does not output a switching instruction to the switching circuit until a response to the data signal is transmitted when the data signal is received in the second connection. A receiver comprising the above.

2. The receiver according to claim 1, wherein the annular antenna is formed by the conductor and the substrate.

3. A system comprising a transmitter for transmitting a power supply signal or a data signal, and a receiver for receiving the power supply signal and the data signal, wherein the receiver includes an annular antenna including a conductor having a predetermined width and a substrate, a rectifying circuit installed on the substrate for rectifying a power supply signal received by the antenna, a processing circuit installed on the substrate for performing processing to transmit or receive a data signal in a frequency band different from that of the power supply signal via the antenna, and a switching circuit installed on the substrate for switching between a first connection between the antenna and the rectifying circuit and a second connection between the antenna and the processing circuit at a predetermined period. The transmitter transmits the power supply signal or the data signal to the receiver based on the switching frequency of the switching circuit.

4. An antenna made of a conductor having a predetermined width and having an annular shape, a substrate arranged to close a cylindrical portion of the annular antenna, a rectifying circuit installed on the substrate for rectifying a power supply signal received by the antenna, a processing circuit installed on the substrate for performing processing to transmit a data signal via the antenna, and a sensor attached to the substrate. A receiver comprising the above.

5. The receiver according to claim 4, further comprising a branching unit installed on the substrate for branching a signal received by the antenna and outputting the branched signal to the rectifying circuit or the processing circuit.

6. ​ The receiver according to claim 4, comprising one or more matching circuits for impedance matching between the antenna and the rectifier circuit, and impedance matching between the antenna and the processing circuit, which are installed on the substrate.

7. The receiver according to claim 5, comprising a switching circuit as the branching portion for switching the connection between the antenna and the rectifier circuit and the connection between the antenna and the processing circuit.

8. The receiver according to claim 5, comprising a circulator for supplying the signal received by the antenna to the rectifier circuit and supplying the signal generated by the processing circuit to the antenna.

9. The receiver according to claim 4, comprising a filter for passing a signal of a corresponding frequency between the antenna and the rectifier circuit, between the antenna and the processing circuit, or both.

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