System, transmitter, and method

Abstract

To reduce a load to form a power electric system when constructing a power supply area by a plurality of transmitters.SOLUTION: The present invention includes: a plurality of transmitters for sending a wireless signal for power supply; and an information processor for supplying power to transmit a wireless signal. The transmitters are electrically connected to an information processor in series.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a system, a transmitter, and a method. [Background technology]

[0002] In recent years, wireless power transfer (WPT) has been used in various fields. By utilizing WPT, problems such as wiring strain, breakage, and maintenance can be avoided compared to wired power transfer.

[0003] Patent Document 1 describes a system that supplies power to a device that requires power by microwave transmission. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-223018 A Summary of the Invention [Problem to be solved by the invention]

[0005] In this patent, a system provides wireless charging and / or mains power to electronic / electrical devices by a power transmission grid obtaining operating power from an AC mains power source via a power cord plugged into a power outlet.

[0006] However, Patent Document 1 does not disclose forming a power supply area by using a plurality of transmitters and supplying power to devices within the power supply area.

[0007] An object of the present disclosure is to reduce the burden of constructing a power supply system when a power supply area is formed by multiple transmitters. [Means for solving the problem]

[0008] A system comprising a plurality of transmitters that transmit wireless signals for power supply, and an information processing device that supplies power for transmitting the wireless signals, the plurality of transmitters being electrically connected in series to the information processing device. Effect of the Invention

[0009] According to the present disclosure, when a power supply area is formed by a plurality of transmitters, the burden for constructing a power supply system can be reduced. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing the overall configuration of a WPT system 1 according to an embodiment of the present invention. [Diagram 2] 2 is a block diagram showing an example of the configuration of a transmitter 100 and a receiver 200 shown in FIG. [Diagram 3] 2 is a block diagram showing an example of a configuration when a first information processing device 300 and a transmitter 100 are connected to each other. [Figure 4] 13 is a block diagram showing another example of the configuration when the first information processing device 300 and the transmitter 100 are connected to each other. FIG. [Diagram 5] FIG. 13 is a block diagram showing another example of the configuration when the first information processing device 300 and the transmitter 100A are connected to each other. [Figure 6] 1 is a block diagram showing an example of a configuration when a plurality of transmitters 100 are connected to a first information processing device 300 via a cable 301. FIG. [Figure 7] 13 is a block diagram showing another example of the configuration when the first information processing device 300 and the transmitter 100 are connected to each other. FIG. [Figure 8] FIG. 2 is a block diagram showing the basic hardware configuration of a computer 90. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In all the drawings explaining the embodiment, the same reference numerals are given to common components, and repeated explanations are omitted. Note that the following embodiment does not unduly limit the contents of the present disclosure described in the claims. In addition, not all of the components shown in the embodiment are essential components of the present disclosure. In addition, each figure is a schematic diagram and is not necessarily illustrated strictly.

[0012] <Summary> In a Wireless Power Transfer (WPT) system that includes a plurality of transmitters that transmit wireless signals for power supply and an information processing device that supplies power for transmitting the wireless signals, the plurality of transmitters are electrically connected in series to the information processing device.

[0013] <1 Overall system configuration> FIG. 1 is a diagram showing the overall configuration of a WPT system 1 according to this embodiment.

[0014] 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. The transmitter 100 is daisy-chained to the first information processing device 300. This can be said as being connected to the first information processing device 300 in a daisy chain. Specifically, the transmitter 100-1 and the first information processing device 300 are connected by a cable 301-1. The transmitter 100-1 and the transmitter 100-2 are connected by a cable 301-2. The transmitter 100-2 and the transmitter 100-3 are connected by a cable 301-3. Since the transmitters 100-1 to 100-3 have substantially the same structure, they will be referred to as "transmitters 100" when no distinction is necessary. The connection between the first information processing device 300 and the second information processing device 400 may be wired or wireless.

[0015] 1 shows an example in which the WPT system 1 includes three transmitters 100, 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.

[0016] 1 shows an example in which the WPT system 1 includes seven receivers 200, 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 eight or more.

[0017] In this embodiment, the transmitter 100 is a (power) transmitter 100 in the sense of wirelessly transmitting power, and similarly, the receiver 200 is a (power) receiver 200 in the sense of wirelessly receiving power. As described below, the receiver 200 may transmit, for example, information on the state of the receiver 200 or information on a measurement result by a sensor as a data signal to the transmitter 100, 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.

[0018] 1 shows an example in which the WPT system 1 includes two first information processing devices 300, 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 three or more.

[0019] The transmitter 100 transmits, for example, a power supply signal or a data signal to the receiver 200. The transmitter 100 transmits the power supply signal to the receiver 200 by radio waves in the 920 MHz band, for example. The transmitter 100 transmits the 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.

[0020] The transmitter 100 may, for example, feed power to one receiver 200 or to multiple receivers 200. The transmitter 100 may, for example, transmit a data signal to one receiver 200 or to multiple receivers 200. The transmitter 100 may, for example, transmit the same data signal as another transmitter 100, or may transmit a data signal different from that of the other transmitters 100. The transmitter 100 may, for example, transmit 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.

[0021] The transmitter 100 receives, for example, a data signal transmitted from the receiver 200. The transmitter 100 may receive, for example, a data signal transmitted from one receiver 200, or may receive data signals transmitted from a plurality of 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 related to the state of the transmitter 100 to the first information processing device 300. The signal transmitted from the transmitter 100 is transmitted to the first information processing device 300 via the plurality of transmitters 100 connected in a daisy chain.

[0022] 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.

[0023] The receiver 200 transmits, for example, information relating to the state of the receiver 200 or information relating to the measurement results of a sensor to the transmitter 100 as a data signal.

[0024] The first information processing device 300 is an information processing device that monitors the operation of the transmitter 100 and the receiver 200 housed in the WPT system 1. For example, the first information processing device 300 determines whether the transmitter 100 or the receiver 200 is in a preset state based on information about the state of the transmitter 100 and the receiver 200 transmitted from the transmitter 100. If it is determined that the transmitter 100 or the receiver 200 is in a preset state, the first information processing device 300 transmits predetermined information to the second information processing device 400.

[0025] 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 information about the states of the transmitter 100 and the receiver 200 transmitted from the transmitter 100 in a storage unit provided in the first information processing device 300.

[0026] Moreover, the first information processing device 300 supplies power to the connected transmitters 100. Specifically, for example, the first information processing device 300 supplies a predetermined amount of power to the transmitter 100-1 via a cable 301-1. The amount of power to be supplied may be set in advance or may vary depending on the number of connected transmitters. The power supplied from the first information processing device 300 to the transmitter 100-1 is sequentially transmitted to the daisy-chained transmitters 100-2 and 100-3.

[0027] Furthermore, the first information processing device 300 controls the operation of the transmitter 100 housed in the WPT system 1. For example, the first information processing device 300 transmits a predetermined instruction or information to the transmitter 100. The predetermined instruction or information transmitted from the first information processing device 300 includes, for example, the timing of transmitting a power supply signal, turning on and off the transmitter 100, monitoring the state of the transmitter 100, resetting the state of the transmitter 100, acquiring the version of the transmitter 100, acquiring sensor data received by the transmitter 100, sending a test command, and the like. These instructions or information may be transmitted, for example, by a command set in advance.

[0028] Specifically, for example, the first information processing device 300 designates at least one of the transmitters 100-1 to 100-3, and transmits a data signal including a predetermined instruction or information to the transmitter 100-1 via the cable 301-1. That is, the first information processing device 300 transmits power and a data signal through a single cable, although the transmission lines themselves are different. The data signal transmitted from the first information processing device 300 to the transmitter 100-1 is transmitted to the designated transmitter 100 via the transmitters 100-2 and 100-3 connected in a daisy chain. The first information processing device 300 may transmit a data signal addressed to any transmitter 100 to the transmitter 100-1 without designating a destination.

[0029] In addition, the first information processing device 300 controls the operation of the second information processing device 400 .

[0030] The second information processing device 400 is, for example, an information processing device operated by an administrator of the WPT system 1. When the second information processing device 400 receives a notification from the first information processing device 300 that the transmitter 100, the receiver 200, or both of them housed 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.

[0031] Moreover, the second information processing device 400 analyzes information on the status of the transmitter 100 and the receiver 200 stored in the first information processing device 300, and presents predetermined information to the user. The predetermined information is, for example, the following. Information regarding placement of transmitter 100 Information regarding the placement of the receiver 200 Power consumption information Information on power consumption

[0032] <1.1 Transmitter and receiver configuration> FIG. 2 is a block diagram showing an example of the configuration 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, spaced apart 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 apart. Specifically, for example, the transmitter 100 is fixedly installed at a predetermined high position provided in a high place indoors, for example, on a ceiling or a wall. The receiver 200 is installed in a predetermined device indoors, or placed near a device that requires power supply. The receiver 200 may also 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, 920 MHz band. The receiver 200 converts the power supply signal transmitted from the transmitter 100 into power, and charges the device with the converted power, or supplies the converted power to the predetermined device.

[0033] The transmitter 100 includes, for example, an oscillator 101, a transmitting antenna 102, a microcomputer (controller) 103, a data transceiver 104, a data transmitting / receiving antenna 105, a first connection unit 106, a distribution unit 107, and a second connection unit 108. The oscillator 101, the microcomputer 103, the data transceiver 104, the data transmitting / receiving antenna 105, the distribution unit 107, or a combination of at least any of these may be mounted on, for example, a PCB (printed circuit board). The transmitter 100 may also include a power storage unit that stores the supplied power.

[0034] The oscillator 101 is driven by a portion of the power received at the first connection unit 106, and oscillates a signal in a predetermined frequency band, for example, the 920 MHz band. The oscillated signal may be amplified and unnecessary frequency components may be removed, if necessary.

[0035] The transmitting antenna 102 is formed so as to be capable of efficiently transmitting radio waves in the 920 MHz band, for example. The transmitting antenna 102 radiates a signal oscillated by an oscillator 101 as a power supply signal.

[0036] The microcomputer 103 controls the operation of the transmitter 100. The microcomputer 103 is realized by, for example, a semiconductor device equipped with an ARM processor. The microcomputer 103 controls the transmission of radio waves by the transmitting antenna 102 based on, for example, a data signal supplied from the first information processing device 300 arranged in the preceding stage or the transmitter 100.

[0037] Furthermore, the microcomputer 103 judges whether or not the power supplied from, for example, the first information processing device 300 or the transmitter 100 arranged in the preceding stage satisfies a predetermined requirement. Specifically, for example, the power supplied from the first information processing device 300 or the transmitter 100 arranged in the preceding stage is measured by a measuring device (not shown) provided in the transmitter 100. The measuring device may measure the amount of current or may measure the voltage. The microcomputer 103 judges whether or not the measurement result satisfies a preset requirement. When the microcomputer 103 judges that the measurement result does not satisfy the preset requirement, it presents the judgment result to the user.

[0038] Specifically, for example, a power value capable of driving transmitter 100 is set, and microcomputer 103 judges whether the measurement result is equal to or greater than this power value. More specifically, for example, when transmitter 100 transmits a 1 W power supply signal to receiver 200, transmitter 100 requires approximately 6 W of power. Microcomputer 103 judges whether the measurement result is equal to or greater than 6 W. If the measurement result is less than the set power value, microcomputer 103 presents the judgment result to the user.

[0039] The transmitter 100 may have a light-emitting unit, a sound-producing unit, or the like. The microcomputer 103 visually presents the determination result by the light-emitting unit, or audibly presents the determination result by the sound-producing unit. When the determination result is presented to the user, the user removes the transmitter 100 connected at the end of the daisy-chain connection. Alternatively, when the determination result is presented to the user, the user operates the first information processing device 300, for example, to increase the amount of power supply. The user may input the operation of the first information processing device 300 from the first information processing device 300, or may input it from an operation terminal that the user possesses.

[0040] The measuring device may measure the power received by the first connection unit 106. At this time, for example, a predetermined power is set according to the number of connections, and the microcomputer 103 judges whether the measurement result is equal to or greater than this power value.

[0041] The data transceiver 104 performs processes such as converting digital data to analog data, modulating analog data, etc. The data transceiver 104 also performs processes such as demodulating a data signal received by the data transceiver antenna 105, and digitizing the demodulated data. For example, the data transceiver 104 extracts a predetermined signal from the data signal received by the data transceiver antenna 105, converts it into digital data, and transmits it to the microcomputer 103.

[0042] The data transmission / reception antenna 105 is formed to be capable of efficiently transmitting and receiving radio waves in the 2.4 GHz band, for example. The data transmission / reception antenna 105 radiates a data signal supplied from the data transceiver 104. In addition, the data transmission / reception antenna 105 receives a data signal transmitted from the receiver 200.

[0043] The first connection unit 106 is connected to, for example, the first information processing device 300 arranged in the previous stage, or the transmitter 100 (a device arranged in the previous stage). Specifically, the first connection unit 106 is, for example, a connection terminal connected to the device arranged in the previous stage by a cable 301. The first connection unit 106 receives, for example, power or a data signal supplied from the device arranged in the previous stage via the cable 301. A part of the power received by the first connection unit 106 is supplied to a power meter (not shown), and the power value is measured, and then used by the transmitter 100. In the case where the transmitter 100 has a power storage unit, the power may be supplied to the power storage unit after the power value is measured. The power obtained by subtracting the power used by the transmitter 100 is output to the second connection unit 108. The data signal received by the first connection unit 106 is output to the distribution unit 107.

[0044] Moreover, first connection unit 106 transmits the data signal received by second connection unit 108 to the device located at the upstream stage via cable 301. Moreover, first connection unit 106 transmits the data signal output from microcomputer 103 to the device located at the upstream stage via cable 301.

[0045] For example, the distributor 107 distributes the data signal output from the first connector 106. For example, the distributor 107 outputs the distributed data signal to the microcomputer 103. For example, the distributor 107 outputs the data signal from which the data is to be distributed to the second connector 108.

[0046] The second connection unit 108 is connected to, for example, the transmitter 100 arranged in the subsequent stage. Specifically, the second connection unit 108 is, for example, a connection terminal connected to the transmitter 100 arranged in the subsequent stage via a cable 301. The second connection unit 108 transmits, for example, the power output from the first connection unit 106 and the data signal output from the distribution unit 107 to the transmitter 100 arranged in the subsequent stage via the cable 301.

[0047] Furthermore, the second connection unit receives a data signal supplied from the transmitter 100 arranged in the subsequent stage via the cable 301. The second connection unit outputs the received data signal to the first connection unit .

[0048] The receiver 200 includes, for example, a receiving antenna 201, a rectifier 202, a power management unit 203, a power storage unit 204, a microcomputer 205, a data transceiver 206, and a data transmitting / receiving antenna 207. The receiving antenna 201, the rectifier 202, the power management unit 203, the power storage unit 204, the microcomputer 205, the data transceiver 206, and the data transmitting / receiving antenna 207, or at least any combination of these, may be mounted on, for example, a PCB or an FPC (flexible printed circuit board).

[0049] The receiving antenna 201 is formed so as to be able to efficiently receive radio waves in the 920 MHz band, for example. The receiving antenna 201 receives the power supply signal radiated from the transmitting antenna 102.

[0050] The rectifier 202 rectifies the radio waves received as a power supply signal and converts them into a DC voltage.

[0051] The power management unit 203 manages the DC voltage. For example, the power management unit 203 controls a charging voltage based on the DC voltage. The power management unit 203 charges the power storage unit 204 by controlling the charging voltage. In addition, for example, when the power storage unit 204 stores power equal to or greater than a predetermined capacity, the power management unit 203 supplies the DC voltage to a connected member.

[0052] Furthermore, the power management unit 203 releases the power stored in the power storage unit 204 in response to control from the microcomputer 205 .

[0053] The power storage unit 204 stores power in response to an instruction from the power management unit 203. The power storage unit 204 is realized by, for example, a battery or a capacitor. Furthermore, the power storage unit 204 releases the stored power in response to an instruction from the power management unit 203.

[0054] The microcomputer 205 controls the operation of the receiver 200. The microcomputer 205 is driven by a DC voltage supplied from the power management unit 203 or by power stored in the power storage unit 204. The microcomputer 205 controls the power management unit 203 to cause the power storage unit 204 to release the power stored therein.

[0055] For example, various sensors can be connected to the receiver 200. For example, a heat sensor, a temperature sensor, a light sensor, a humidity sensor, a vibration sensor, and the like are connected to the receiver 200. The sensors connected to the receiver 200 are driven by, for example, a direct current voltage supplied from the power management unit 203 or power discharged from the power storage unit 204. The microcomputer 205 continuously or intermittently monitors the voltage value at a predetermined portion of the receiver 200, the status of the sensor connected to the receiver 200, information detected by the sensor, and the like. The microcomputer 205 transmits the voltage value at a predetermined portion of the receiver 200, the status of the sensor connected to the receiver 200, information detected by the sensor, and the like as digital data to the data transceiver 206. The sensor may be built into the receiver 200.

[0056] The data transceiver 206 performs processes such as converting digital data supplied from the microcomputer 205 into analog data and modulating the analog data. The data transceiver 206 also performs processes such as demodulating a data signal received by a data transceiver antenna 207 and digitizing the demodulated data. The data transceiver 206 is driven by, for example, a DC voltage supplied from the power management unit 203 or power discharged from the power storage unit 204.

[0057] The data transmission / reception antenna 207 is formed to be capable of efficiently transmitting and receiving radio waves in the 2.4 GHz band, for example. The data transmission / reception antenna 207 radiates a data signal supplied from the data transceiver 206. In addition, the data transmission / reception antenna 207 receives a data signal transmitted from the transmitter 100. For example, the data transmission / reception antenna 207 is driven by a DC voltage supplied from the power management unit 203 or power discharged from the power storage unit 204.

[0058] <2 Daisy chain connection> Fig. 3 is a block diagram showing a configuration example when a first information processing device 300 and a transmitter 100 are connected. In the diagram shown in Fig. 3, a plurality of transmitters 100 are daisy-chained to the first information processing device 300. The first information processing device 300 and the transmitter 100, and the transmitters 100 themselves, are connected by cables 301.

[0059] The first information processing device 300 has a power supply unit 302. Specifically, for example, the power supply unit 302 includes a converter that converts AC voltage into DC voltage, and supplies the DC voltage to the connected transmitter 100. The power supplied from the power supply unit 302 may be set in advance, may vary depending on the number of connected transmitters, or may vary depending on a user's operation. In addition, the power supplied from the power supply unit 302 may vary depending on the control of the control unit 303. Note that, when a DC voltage is supplied to the first information processing device 300, the power supply unit 302 may not include a converter function.

[0060] The power supplied from the first information processing device 300 is supplied to the transmitters 100 connected in a daisy chain. The strength of the supplied power is measured in each transmitter 100. The microcomputer 103 determines whether the supplied power is sufficient to drive the transmitter 100 based on the measured power strength. If the supplied power is less than the power sufficient to drive the transmitter 100, the microcomputer 103 notifies the user of this fact.

[0061] The transmitter 100 has a termination resistor 109. Although only the transmitter 100 connected to the end is shown to have the termination resistor 109 in Fig. 3, all the transmitters 100 may have the termination resistor 109. In the transmitter 100 connected to the end, the output destination of the power output from the first connection unit 106 is switched to the termination resistor 109 instead of the second connection unit 108.

[0062] The first information processing device 300 has a control unit 303. The control unit 303 transmits a predetermined instruction or information to the transmitter 100 as a data signal.

[0063] 2 and 3, the transmitter 100 has a light emitting unit or a voice generating unit, and determines whether or not sufficient power is being supplied to the transmitter 100, and presents a notification to the user according to the determination result. However, the first information processing device 300 may present a notification to the user according to the determination result.

[0064] Specifically, for example, the microcomputer 103 included in any one of the transmitters 100 connected in the daisy chain transmits the determination result from the first connection unit 106 to the first information processing device 300 as the transmission destination. At this time, the microcomputer 103 adds, for example, the identification information of the own device. The control unit 303 analyzes the received information and identifies the transmitter 100 that transmitted the data. The control unit 303 notifies the user that the identified transmitter 100 has insufficient power. The control unit 303 notifies the user that the power is insufficient by using, for example, a predetermined notification function included in the first information processing device 300. The control unit 303 may notify the user that the power is insufficient to a terminal carried by the user via a communication line. In addition, the control unit 303 may increase the power supplied from the power supply unit 302 so that the transmitter 100 that has insufficient power can be supplied with power.

[0065] 2 and 3, the transmitter 100 judges whether or not sufficient power is supplied to the transmitter 100. However, the first information processing device 300 may perform the judgment regarding the supply of power. For example, the microcomputer 103 may transmit the measurement result by the measuring device from the first connection unit 106 with the first information processing device 300 as the transmission destination. At this time, the microcomputer 103 adds, for example, the identification information of the own device. The control unit 303 analyzes the received information and identifies the transmitter 100 that transmitted the data. The control unit 303 judges whether or not the measurement result satisfies a predetermined requirement. If the measurement result does not satisfy the predetermined requirement, the control unit 303 notifies the user that the identified transmitter 100 does not have enough power. The control unit 303 may increase the power supplied from the power supply unit 302 so that the transmitter 100 that does not have enough power can be supplied with power.

[0066] 3, the case has been described in which the termination resistor 109 is provided in the transmitter 100. However, the termination resistor 109 does not have to be provided in the transmitter 100. For example, the termination resistor 304 may be connected to the second connection unit 108 of the transmitter 100.

[0067] Fig. 4 is a block diagram showing another example of the configuration when the first information processing device 300 and the transmitter 100 are connected to each other. In the diagram shown in Fig. 4, a termination resistor 304 is connected to the second connection unit 108 of the transmitter 100 connected to the end of the daisy chain connection.

[0068] As described above, in the above embodiment, the system 1 includes a plurality of transmitters 100 that transmit wireless signals for power supply, and a first information processing device 300 that supplies power for transmitting the wireless signals. The plurality of transmitters 100 are electrically connected in series to the first information processing device 300. This eliminates the need to provide a power supply line for power supply to each of the transmitters 100. Since the power tends to be insufficient in a daisy chain connection, devices with high power consumption are not easily connected. In this embodiment, a device with high power consumption such as the transmitter 100 is connected, but the power consumed by each transmitter 100 is equal. In addition, the possibility that the power consumption will suddenly change in the transmitter 100 that forms the power supply area is low. Therefore, although the plurality of transmitters 100 are daisy chain connected, it is possible to stably supply power to each transmitter 100. Therefore, wiring or the like for individually supplying power to each transmitter 100 is not required.

[0069] Therefore, according to the system 1 according to this embodiment, when a power supply area is formed by a plurality of transmitters, the burden for constructing a power supply system can be reduced.

[0070] In the above embodiment, at least one of the multiple transmitters 100 is connected to the first information processing device 300 and another transmitter 100, receives power supplied from the first information processing device 300, and supplies at least a part of the received power to the other transmitter 100 connected thereto. At least one of the multiple transmitters 100 is connected to another transmitter 100 in a daisy chain, receives power supplied from the previous transmitter 100, and supplies at least a part of the received power to the subsequent transmitter 100. This realizes a daisy chain connection of the transmitters 100 to the first information processing device 300.

[0071] In the above embodiment, the multiple transmitters 100 transmit wireless signals using a portion of the power supplied from the first information processing device 300 or the preceding transmitter 100, and supply at least a portion of the remaining power to the following transmitter 100. This makes it unnecessary to supply power to the transmitters 100 individually.

[0072] In the above embodiment, at least one of the transmitters 100 connected to the end of the daisy chain includes a termination resistor. This allows the transmitters 100 connected in a daisy chain to be driven stably.

[0073] In the above embodiment, the transmitter 100 includes a measuring device that measures the strength of the supplied power, a microcomputer 103 that judges whether the measured strength satisfies a preset requirement, and means for notifying the user, the first information processing device 300, or both of information on the result of the judgment if the strength does not satisfy the requirement. This makes it possible to notify the user or the first information processing device 300 of the shortage of power if the supplied power is insufficient.

[0074] In the above embodiment, the transmitter 100 includes a measuring device that measures the intensity of the power to be supplied, and a means for notifying the first information processing device 300 of information related to the measured intensity. The first information processing device 300 includes a control unit 303 that determines whether the power supplied to the transmitter 100 satisfies a preset requirement based on the information related to the intensity. This enables the first information processing device 300 to recognize a transmitter 100 that is short of power.

[0075] <Modification> In the above embodiment, the transmitter 100 has the oscillator 101, and oscillates a signal in a predetermined frequency band using power supplied from the first information processing device 300. However, the transmitter 100 may not have the oscillator 101, and may receive a reference signal of the frequency from the first information processing device 300. Fig. 5 is a block diagram showing another example of the configuration when the first information processing device 300 and the transmitter 100A are connected. In the diagram shown in Fig. 3, a plurality of transmitters 100A are daisy-chained to the first information processing device 300. The first information processing device 300 and the transmitter 100A, and the transmitters 100A themselves, are connected by cables 301. The first information processing device 300 has a control unit 303. The control unit 303 transmits a predetermined instruction or information as a data signal to the transmitter 100A. The control unit 303 also transmits a reference signal of a frequency to the transmitter 100A.

[0076] The first connection unit 106 is connected to, for example, the first information processing device 300 arranged in the preceding stage, or the transmitter 100A (a device arranged in the preceding stage). The first connection unit 106 receives, for example, power, a data signal, or a reference signal supplied from the device arranged in the preceding stage via a cable 301. A part of the power received by the first connection unit 106 is supplied to a power meter (not shown), and after the power value is measured, it is used by the transmitter 100A. The power obtained by subtracting the power used by the transmitter 100A is output to the second connection unit 108. The data signal and the reference signal received by the first connection unit 106 are output to the distribution unit 107.

[0077] The distribution unit 107 distributes, for example, a data signal output from the first connection unit 106. The distribution unit 107 outputs, for example, the distributed data signal to the microcomputer 103. The distribution unit 107 outputs, for example, the data signal to be distributed to the second connection unit 108. The distribution unit 107 distributes, for example, a reference signal output from the first connection unit 106. The distribution unit 107 outputs, for example, the distributed reference signal to the transmitting antenna 102. The reference signal may be amplified as necessary, and unnecessary frequency components may be removed from the reference signal, before being output to the transmitting antenna 102. The distribution unit 107 outputs, for example, the reference signal to be distributed to the second connection unit 108.

[0078] The second connection unit 108 is connected to, for example, the transmitter 100A arranged in the subsequent stage. The second connection unit 108 transmits, for example, the power output from the first connection unit 106, the data signal output from the distribution unit 107, and the reference signal output from the distribution unit 107 to the transmitter 100A arranged in the subsequent stage via the cable 301.

[0079] Furthermore, the second connection unit receives a data signal supplied from the transmitter 100A arranged in the subsequent stage via the cable 301. The second connection unit outputs the received data signal to the first connection unit .

[0080] In this way, by transmitting a reference frequency signal from the first information processing device 300 to the transmitter 100A, it is possible to unify the frequency of the power supply signal radiated from the transmitter 100A without providing an oscillator in the transmitter 100A.

[0081] Even when a reference signal of a frequency is transmitted from the first information processing device 300, the transmitter 100 may have the oscillator 101. In this case, for example, the frequency of the reference signal is 10 MHz, and the oscillator 101 oscillates a signal of 920 MHz based on the reference signal.

[0082] In the above embodiment, the case where the number of transmitters 100 connected to the first information processing device 300 via the cable 301 is one has been described as an example. However, the number of transmitters 100 connected to the first information processing device 300 via the cable 301 is not limited to one. The first information processing device 300 may be connected to a plurality of transmitters 100 connected in a daisy chain.

[0083] Fig. 6 is a block diagram showing a configuration example when a plurality of transmitters 100 are connected to a first information processing device 300 by a cable 301. In the diagram shown in Fig. 6, two transmitters 100 are connected to the first information processing device 300. The number of transmitters 100 that can be connected to one chain is limited based on the amount of power supplied from the first information processing device 300. However, by providing a plurality of systems, it is possible to increase the number of connectable transmitters 100.

[0084] In the above embodiment, the microcomputer 103 or the control unit 303 determines whether the strength of the power supplied to the transmitter 100 satisfies a predetermined requirement. The predetermined requirement at this time may be a stepwise requirement. Specifically, for example, a first threshold value, a second threshold value, etc. may be set based on the strength of the power. For example, the first threshold value represents a minimum power strength required to drive the transmitter 100. The second threshold value represents a power strength higher than the first threshold value. For example, when the measured value is less than the first strength, the microcomputer 103 or the control unit 303 notifies the user that the supplied power is insufficient. Also, when the measured value is equal to or greater than the first threshold value and less than the second strength, the microcomputer 103 or the control unit 303 notifies the user that the supplied power is likely to be insufficient.

[0085] In the above embodiment, the application to the so-called WPT system 1 in which the transmission power consisting of an AC signal is wirelessly transmitted from the transmitter 100 to the receiver 200 has been described, but it is naturally possible to apply it to a system that provides power to the receiver 200 by other methods. Since such systems are known, detailed description will be omitted. As an example, there is a system that transmits power generated by solar power generation to the receiver 200 regardless of whether it is wired or wireless, and further, a system that transmits power to the receiver 200 by laser light regardless of whether it is wired or wireless. In addition, it is also applicable to a configuration in which vibration or sound is given to the receiver 200 and the receiver 200 converts the power of the vibration or the like into power. In addition, it is naturally applicable to a system that uses a known non-contact power supply technology other than the system that wirelessly receives the transmission power consisting of an AC signal, for example, a non-contact power supply technology using a magnetic field coupling method.

[0086] In the above embodiment, the case where power is supplied from the first information processing device 300 has been described, but the source of power supply is not limited to only the first information processing device 300. The transmitters 100 may be connected in a daisy chain, and a power feed line may be connected to at least one of the transmitters 100 connected in the daisy chain. Power is supplied from the transmitter 100 to which the power feed line is connected to the transmitters 100 connected in the daisy chain. The transmitter 100 to which the power feed line is connected may be the first transmitter 100 connected in the daisy chain, the last transmitter 100, or an intermediate transmitter 100. Fig. 7 is a block diagram showing another example of the configuration when the first information processing device 300 and the transmitter 100 are connected to each other. In the example shown in Fig. 7, a power supply line is connected to the first transmitter 100 in the daisy chain connection, and power is supplied to the first transmitter 100.

[0087] In the above embodiment, the case where power and a data signal are transmitted through one cable and the case where power, a data signal, and a reference signal are transmitted through one cable have been described. However, the cable for transmitting signals to the daisy-chained transmitters 100 is not limited to one. For example, the cable for transmitting power between the daisy-chained transmitters 100 and the cable for transmitting a data signal between the daisy-chained transmitters 100 may be separate cables. Also, the cable for transmitting a reference signal between the daisy-chained transmitters 100 may be a cable different from the cable for transmitting power and the cable for transmitting a data signal.

[0088] <3 Basic computer hardware configuration> 8 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 (interface) 99. These are electrically connected to each other via a bus.

[0089] The processor 91 is hardware for executing an instruction set described in a program, and is composed of an arithmetic unit, a register, a peripheral circuit, and the like.

[0090] The main storage device 92 is for temporarily storing programs, data to be processed by the programs, etc. For example, it is a volatile memory such as a DRAM (Dynamic Random Access Memory).

[0091] The auxiliary storage device 93 is a storage device for saving data and programs, such as a flash memory, a hard disk drive (HDD), a magneto-optical disk, a CD-ROM, a DVD-ROM, or a semiconductor memory.

[0092] The communication IF 99 is an interface for inputting and outputting signals for communicating with other computers via a network using a wired or wireless communication standard. The network is composed of the Internet, a LAN, various mobile communication systems constructed by wireless base stations, etc. For example, the network includes 3G, 4G, 5G mobile communication systems, LTE (Long Term Evolution), wireless networks that can connect to the Internet via a specified access point (e.g., Wi-Fi (registered trademark)), etc. In the case of wireless connection, communication protocols include, for example, Z-Wave (registered trademark), ZigBee (registered trademark), Bluetooth (registered trademark), etc. In the case of wired connection, the network also includes a network that is directly connected by a USB (Universal Serial Bus) cable or the like.

[0093] It should be noted that the computer 90 can be virtually realized by distributing all or part of each hardware configuration among multiple computers 90 and connecting them together via a network. In this way, the computer 90 is a concept that includes not only a computer 90 housed in a single housing or case, but also a virtualized computer system.

[0094] <Basic functional configuration of computer 90> A description will now be given of the functional configuration of a computer realized by the basic hardware configuration of a computer 90 shown in Fig. 8. The computer includes at least the functional units of a control unit, a storage unit, and a communication unit.

[0095] The functional units of the computer 90 can also be realized by distributing all or part of the functional units among multiple computers 90 connected to each other via a network. The computer 90 is a concept that includes not only a single computer 90 but also a virtualized computer system.

[0096] The control unit is realized by the processor 91 reading out various programs stored in the auxiliary storage device 93, expanding the programs in the main storage device 92, and executing processes according to the programs. The control unit can realize functional units that perform various information processing depending on the type of program. In this way, the computer is realized as an information processing device that performs information processing.

[0097] The storage unit is realized by a main storage device 92 and an auxiliary storage device 93. The storage unit stores data, various programs, and various databases. Furthermore, 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 in accordance with a program. Furthermore, the control unit can cause the processor 91 to execute processes of adding, updating, and deleting data stored in the storage unit in accordance with the various programs.

[0098] A database refers to a relational database, which is used to manage data sets called tables, which are structured according to rows and columns, by relating them to each other. In a database, a table is called a table, a column in a table is called a column, and a row in a table is called a record. In a relational database, it is possible to set relationships between tables and associate them. Usually, a column is set in each table as a key for uniquely identifying a record, but setting a key in the 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.

[0099] The communication unit is realized by the communication IF 99. The communication unit realizes a function of communicating with other computers 90 via a network. The communication unit can receive information transmitted from other computers 90 and input the information to the control unit. The control unit can cause the processor 91 to execute information processing on the received information in accordance with various programs. In addition, the communication unit can transmit information output from the control unit to other computers 90.

[0100] Although several embodiments of the present disclosure have been described above, these embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications are within the scope of the invention and its equivalents as described in the claims, as well as the scope and spirit of the invention.

[0101] In the above description, a "processor" refers to one or more processors. The at least one processor is typically a microprocessor such as a CPU (Central Processing Unit), but may be another type of processor such as a GPU (Graphics Processing Unit). The at least one processor may be a single-core or multi-core.

[0102] Furthermore, the at least one processor may be a processor in the broad sense, such as a hardware circuit (for example, a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC)) that performs part or all of the processing.

[0103] In the above explanation, information that gives an output for an input is sometimes explained using expressions such as "xxx table", but this information may be data of any structure, or may be a learning model such as a neural network that generates an output for an input. Therefore, "xxx table" can be called "xxx information".

[0104] Furthermore, in the above description, the configuration of each table is an example, and one table may be divided into two or more tables, or all or part of two or more tables may be one table.

[0105] In addition, in the above explanation, the processing may be explained using the "program" as the subject, but since the program is executed by a processor to perform a specified processing step by appropriately using a memory unit and / or an interface unit, etc., the subject of the processing may be the processor (or a device such as a controller having the processor, or a microcomputer).

[0106] 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. 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.

[0107] Furthermore, in the above description, identification numbers are used as identification information for various objects, but other types of identification information (for example, identifiers including alphabetic characters or symbols) other than identification numbers may also be used.

[0108] In addition, in the above description, when describing elements of the same type without distinguishing between them, reference signs (or common signs among the reference signs) may be used, and when describing elements of the same type with distinction between them, the identification numbers (or reference signs) of the elements may be used.

[0109] In the following description, the control lines and information lines are those that are considered necessary for the description, and not all control lines and information lines in the product are necessarily shown. All components may be connected to each other.

[0110] <Additional Notes> The matters described in the above embodiments will be supplemented below. (Appendix 1) A system comprising a plurality of transmitters that transmit wireless signals for power supply, and an information processing device that supplies power for transmitting the wireless signals, the plurality of transmitters being electrically connected in series to the information processing device. (Appendix 2) At least one of the multiple transmitters is connected to an information processing device and another transmitter, receives power supplied from the information processing device, and supplies at least a portion of the received power to the other transmitter connected thereto, and at least one of the multiple transmitters is connected in a daisy chain with other transmitters, receives power supplied from the transmitter in the previous stage, and supplies at least a portion of the received power to the transmitter in the subsequent stage (a system described in Appendix 1). (Appendix 3) The system described in (Appendix 2) in which the multiple transmitters transmit wireless signals using a portion of the power supplied from an information processing device or a transmitter in a preceding stage, and supply at least a portion of the remaining power to a transmitter in a subsequent stage. (Appendix 4) A system described in any one of (Appendix 1) to (Appendix 3), wherein at least one of the multiple transmitters connected to the end of the daisy chain includes a termination resistor. (Appendix 5) A system described in any one of (Appendix 1) to (Appendix 4), in which at least two of the multiple transmitters are connected to an information processing device and other transmitters, receive power supplied from the information processing device, and supply at least a portion of the received power to the other connected transmitters. (Appendix 6) The system described in any one of (Appendix 1) to (Appendix 5) includes a transmitter that is equipped with a means for measuring the power being supplied, a means for determining whether the measured power satisfies a preset requirement, and, if not, a means for notifying a user, an information processing device, or both of information regarding the result of the determination. (Appendix 7) The transmitter has a means for measuring the power being supplied and a means for notifying an information processing device of information relating to the measured power, and the information processing device has a means for determining, based on the information, whether the power being supplied to the transmitter satisfies predetermined requirements. A system described in any of (Appendix 1) to (Appendix 5). (Appendix 8) A system described in any one of (Appendix 1) to (Appendix 7), in which the information processing device transmits a reference signal for generating a wireless signal at a predetermined frequency to a connected transmitter, and the transmitter transmits a reference signal provided from the information processing device or a previous-stage transmitter to a subsequent-stage transmitter via a series connection. (Appendix 9) The information processing device or the transmitter transmits power and a reference signal through a single cable (a system as described in Appendix 8). (Appendix 10) A system described in any one of (Appendix 1) to (Appendix 9), in which the information processing device transmits a data signal including specified information to a connected transmitter, and the transmitter transmits a data signal supplied from the information processing device or a previous-stage transmitter to a subsequent-stage transmitter via a serial connection. (Appendix 11) The information processing device or transmitter transmits power and a data signal through a single cable (a system as described in Appendix 10). (Appendix 12) The information processing device transmits a data signal including predetermined information to a connected transmitter, and the transmitter transmits a data signal provided from the information processing device or a previous-stage transmitter to a subsequent-stage transmitter via a serial connection, and the information processing device or transmitter transmits power, a reference signal, and a data signal over a single cable (a system as described in Appendix 8). (Appendix 13) A transmitter provided in a system described in any one of (Appendix 1) to (Appendix 12). (Appendix 14) A method implemented in a system having a plurality of transmitters that transmit wireless signals for power supply and an information processing device that supplies power for transmitting the wireless signals, in which the information processing device supplies power to a plurality of transmitters electrically connected in series to the information processing device, and the plurality of transmitters transmit wireless signals using a portion of the power supplied from the information processing device or a transmitter in a preceding stage, and supply at least a portion of the remaining power to a transmitter in a succeeding stage. [Explanation of symbols]

[0111] 1. WPT system 100...Transmitter 101...Oscillator 102...Transmitting antenna 103...Microcomputer 104...Data transmitter / receiver 105…Data transmission / reception antenna 200…Receiver 201…Receiving antenna 202…Rectifier 203…Power management department 204…Electricity storage unit 205…Microcomputer 206...Data transmitter / receiver 207…Data transmission / reception antenna 300...First information processing device 400...Second information processing device 500...Third information processing device

Claims

[Claim 1] Multiple transmitters that transmit wireless signals for power supply, An information processing device that supplies power for transmitting the aforementioned wireless signal and Equipped with, The plurality of transmitters are electrically connected in series to the information processing device.

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