WO2023248916A1 - Système d'alimentation électrique, dispositif d'alimentation électrique et dispositif de réception d'énergie - Google Patents

Système d'alimentation électrique, dispositif d'alimentation électrique et dispositif de réception d'énergie Download PDF

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Publication number
WO2023248916A1
WO2023248916A1 PCT/JP2023/022220 JP2023022220W WO2023248916A1 WO 2023248916 A1 WO2023248916 A1 WO 2023248916A1 JP 2023022220 W JP2023022220 W JP 2023022220W WO 2023248916 A1 WO2023248916 A1 WO 2023248916A1
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WO
WIPO (PCT)
Prior art keywords
light
power supply
light receiving
power
receiving section
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PCT/JP2023/022220
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English (en)
Japanese (ja)
Inventor
良之 木村
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京セラ株式会社
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Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2023248916A1 publication Critical patent/WO2023248916A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water

Definitions

  • the present disclosure relates to an optical power feeding system, a power feeding device, and a power receiving device.
  • the optical power feeding system includes: Equipped with a power supply device and a power receiving device,
  • the power supply device includes a light emitting unit that outputs power supply light, and a power supply control unit
  • the power receiving device includes a first light receiving section that converts the incident power feeding light into electric power, a second light receiving section that converts the incident power feeding light into an electrical signal, and a second light receiving section that converts the incident power feeding light into electric power.
  • the power supply control unit is configured to apply the power supply light to a first irradiation state in which at least the first light receiving unit is irradiated, and a state in which both the first light receiving unit and the second light receiving unit are irradiated with the power supply light, and and a second irradiation state in which the irradiated area of the second light receiving section is larger than that of the second irradiation state.
  • the power supply device includes: comprising a light emitting section that outputs the power feeding light toward a first light receiving section and a second light receiving section that convert the incident power feeding light into electricity, and a power feeding control section,
  • the power supply control unit is configured to apply the power supply light to a first irradiation state in which at least the first light receiving unit is irradiated, and a state in which both the first light receiving unit and the second light receiving unit are irradiated with the power supply light, and and a second irradiation state in which the irradiated area of the second light receiving section is larger than that of the second irradiation state.
  • the power receiving device includes: a first light receiving section that converts the incident power supply light into electric power; a second light receiving unit that converts the incident power supply light into an electrical signal; a demodulation unit that demodulates the electrical signal converted by the second light receiving unit to obtain information; Equipped with The first light receiving section and the second light receiving section are arranged in parallel, and a first irradiation state in which the power feeding light is irradiated to at least the first light receiving section; and a first irradiation state in which the power feeding light is irradiated to both the first light receiving section and the second light receiving section; A second irradiation state in which the irradiated area of the second light receiving section is large can be taken.
  • FIG. 1 is a configuration diagram of an optical power feeding system according to a first embodiment of the present disclosure.
  • FIG. 3 is a conceptual diagram showing irradiation of power supply light to two light receiving units according to the first embodiment of the present disclosure.
  • FIG. 3 is a front view of two light receiving sections according to the first embodiment of the present disclosure.
  • FIG. 7 is a diagram showing an example of an output waveform of the second light receiving section according to the first embodiment of the present disclosure.
  • FIG. 7 is a diagram illustrating a modified example of the manner in which the irradiation state of power supply light is switched according to the first embodiment of the present disclosure.
  • FIG. 1 is a configuration diagram of an optical power feeding system according to a first embodiment of the present disclosure.
  • FIG. 3 is a conceptual diagram showing irradiation of power supply light to two light receiving units according to the first embodiment of the present disclosure.
  • FIG. 3 is a front view of two light receiving sections according to the first embodiment of the present disclosure.
  • FIG. 7 is
  • FIG. 7 is a diagram illustrating a modified example of the manner in which the irradiation state of power supply light is switched according to the first embodiment of the present disclosure.
  • FIG. 7 is a diagram illustrating a modified example of the manner in which the irradiation state of power supply light is switched according to the first embodiment of the present disclosure.
  • FIG. 7 is a diagram showing a modification of the light receiving section according to the first embodiment of the present disclosure.
  • FIG. 7 is a diagram showing a modification of the light receiving section according to the first embodiment of the present disclosure.
  • FIG. 2 is a configuration diagram of an optical power feeding system according to a second embodiment of the present disclosure.
  • the power supply control unit 150 controls the laser oscillation of the power supply semiconductor laser 111 to control the output of the power supply light 112 . Further, the power supply control unit 150 controls the operation of the lens drive unit 116 to adjust the focus of the power supply light 112, thereby superimposing information on the power supply light 112. A specific manner of superimposing information will be described later. Note that the information to be superimposed on the power feeding light 112 is not particularly limited. For example, it may be a signal that notifies the power receiving device 310 of the power transmission state of the power feeding device 110 (such as increasing the amount of power being fed), a signal that controls a device of the power receiving device 310 (or an external device), or the like.
  • Power receiving device 310 includes a light receiving chamber 312 that receives power feeding light 112 from power feeding device 110 .
  • the light receiving chamber 312 has an opening 312b in the wall on the power supply device 110 side. Power supply light 112 from power supply device 110 enters into light receiving chamber 312 through opening 312b.
  • a lens such as a parallel plate or a condensing lens without power may be arranged in the opening 312b.
  • the two light receiving sections 311 are irradiated with power feeding light 112 whose focus has been adjusted by the power feeding control section 150 .
  • the power supply control unit 150 adjusts the focus of the power supply light 112 while keeping the laser output of the power supply semiconductor laser 111 substantially constant based on the information to be transmitted, thereby causing the power supply light 112 to emit the first irradiation.
  • Switching is made between state S1 and second irradiation state S2.
  • the first irradiation state S1 is a state in which the second light receiving section 311b is not irradiated and only the first light receiving section 311a is irradiated.
  • the second light receiving section 311b outputs a pulse waveform signal 114 whose ON/OFF state is switched between the second irradiation state S2 and the first irradiation state S1. Therefore, by switching the power supply light 112 between the first irradiation state S1 and the second irradiation state S2, modulated information can be superimposed on the power supply light 112.
  • the power supply light 112 irradiates the second light receiving section 311b in the first irradiation state S1.
  • FIGS. 2B and 2C show an example in which the signal 114 from the second light receiving section 311b is binarized, it is also possible to perform higher-order digital modulation that is more multivalued, or to perform analog modulation. You can.
  • the second irradiation state S2 is set to a plurality of irradiation states (in the example of FIG.
  • the irradiated area and focus state of the power supply light 112 on the first light receiving section 311a and the second light receiving section 311b may or may not change between the first irradiation state S1 and the second irradiation state S2. (It is unchanged in the example of FIG. 3C).
  • two light receiving sections 311 are arranged in parallel with their light receiving surfaces 311af and 311bf in contact with each other.
  • the two light receiving sections 311 may be arranged in parallel with a gap CL interposed between the light receiving surfaces 311af and 311bf.
  • Each of the power feeding semiconductor laser 111 and the two light receiving sections 311 is a photoelectric conversion element containing a laser medium with a laser wavelength of 500 nm or less. More specifically, the semiconductor material constituting the semiconductor region of the power feeding semiconductor laser 111 and the two light receiving sections 311 that performs the optical-to-electrical conversion effect is a semiconductor having a short laser wavelength of 500 nm or less. A semiconductor with a short laser wavelength has a large band gap and high photoelectric conversion efficiency, so the photoelectric conversion efficiency on the power generation side and the power receiving side of optical power supply is improved, and the optical power supply efficiency is improved.
  • a semiconductor material of a laser medium having a laser wavelength (fundamental wave) of 200 to 500 nm such as diamond, gallium oxide, aluminum nitride, or GaN
  • a semiconductor having a band gap of 2.4 eV or more is applied as the semiconductor material.
  • a semiconductor material of the laser medium with a band gap of 2.4 to 6.2 eV, such as diamond, gallium oxide, aluminum nitride, or GaN may be used. Note that the longer the wavelength of laser light, the better the transmission efficiency, and the shorter the wavelength, the better the photoelectric conversion efficiency.
  • the power supply light 112 irradiated onto the second light receiving section 311b is converted into an electrical signal having different output magnitudes between the first irradiation state S1 and the second irradiation state S2.
  • This electrical signal is demodulated by a demodulation circuit 370, and information previously superimposed on the power supply light 112 is extracted. That is, by switching the power supply light 112 between the first irradiation state S1 and the second irradiation state S2, information can be superimposed on the power supply light 112 while supplying power with the power supply light 112. Therefore, power and information can be transmitted simultaneously via the power supply light 112.
  • the power supply control unit 150 switches the power supply light 112 between the first irradiation state S1 and the second irradiation state S2 while keeping the output of the power supply semiconductor laser 111 substantially constant. Therefore, compared to the case where information is superimposed by varying the laser output, for example, it is possible to suppress output fluctuations of the power supply light 112 and improve power supply efficiency.
  • the optical power feeding system 1B of this embodiment includes a first data communication device 100 including a power feeding device 110, an optical fiber cable 200, and a second data communication device 300 including a power receiving device 310.
  • the power supply device 110 includes a power supply semiconductor laser 111 and a power supply control section 150.
  • the first data communication device 100 includes a receiving section 130 in addition to a power supply device 110.
  • the first data communication device 100 corresponds to a data terminal equipment (DTE), a repeater, or the like.
  • the receiving section 130 includes a signal photodiode 131.
  • the optical fiber cable 200 includes an optical fiber 250 that forms a transmission path for signal light.
  • the optical fiber cable 200 has one end connectable to the first data communication device 100 and the other end connectable to the second data communication device 300, and transmits signal light.
  • the power receiving device 310 includes a light receiving chamber 312 that accommodates two light receiving sections 311 (first light receiving section 311a, second light receiving section 311b), and a demodulation circuit 370.
  • Second data communication device 300 includes a power receiving device 310, a transmitter 320, and a data processing unit 340.
  • the second data communication device 300 corresponds to a power end station or the like.
  • the transmitter 320 includes a signal semiconductor laser 321 and a modulator 322.
  • Data processing unit 340 is a unit that processes received signals.
  • the second data communication device 300 is a node in the power supply network. Alternatively, the second data communication device 300 may be a node that communicates with other nodes.
  • the first data communication device 100 is connected to a power source, and a power supply semiconductor laser 111, a signal photodiode 131, etc. are electrically driven. Further, the first data communication device 100 is a node in a power supply network. Alternatively, the first data communication device 100 may be a node that communicates with other nodes.
  • the power supply semiconductor laser 111 oscillates with power from the power source and outputs power supply light 112 . At this time, similarly to the first embodiment, the power supply control unit 150 adjusts the focus of the power supply light 112 while maintaining the laser output of the power supply semiconductor laser 111 substantially constant based on the information to be transmitted.
  • the irradiation state of the power supply light 112 to the two light receiving units 311 is switched between the first irradiation state S1 and the second irradiation state S2.
  • the first irradiation state S1 is a state in which the power supply light 112 is irradiated onto at least the first light receiving section 311a.
  • the second irradiation state S2 is a state in which both the first light receiving section 311a and the second light receiving section 311b are irradiated, and the irradiated area of the second light receiving section 311b is larger than that in the first irradiation state S1.
  • Power feeding light 112 from power feeding device 110 is transmitted to power receiving device 310 of second data communication device 300 via space, and enters into light receiving chamber 312 .
  • the first light receiving unit 311a in the light receiving chamber 312 converts the irradiated power supply light 112 into electric power through the first irradiation state S1 and the second irradiation state S2.
  • the obtained power is used as driving power for the transmitter 320 and the data processing unit 340, and other driving power required in the second data communication device 300.
  • the second data communication device 300 may be capable of outputting the obtained power for external equipment.
  • the second light receiving section 311b converts the irradiated power supply light 112 into an electrical signal whose output size differs between the first irradiation state S1 and the second irradiation state S2.
  • the demodulation circuit 370 demodulates the electrical signal converted by the second light receiving section 311b and extracts information that has been superimposed on the power supply light 112 in advance.
  • the acquired information is output to the data processing unit 340 or to an external device depending on its content.
  • the data processing unit 340 transmits input data to a node, while receiving data from the node and outputting it to the modulator 322 as transmission data 324.
  • the modulator 322 of the transmitter 320 modulates the laser light 323 from the signal semiconductor laser 321 based on the transmission data 324 and outputs it as signal light 325.
  • the signal photodiode 131 of the receiving unit 130 demodulates the signal light 325 transmitted through the optical fiber cable 200 into an electrical signal and outputs the electrical signal. Data based on the electrical signal is transmitted to the node.
  • the data from the node may be information that is superimposed on the power supply light 112 by the power supply control unit 150 controlling the power supply semiconductor laser 111 .
  • Power supply light 112 from the first data communication device 100 is transmitted to the second data communication device 300 via space.
  • Signal light 325 from the second data communication device 300 is input to the optical fiber cable 200 and output to the first data communication device 100. Note that the signal light 325 may be transmitted through space using the PoA method.
  • Each of the power feeding semiconductor laser 111 and the two light receiving sections 311 includes the same semiconductor material as in the first embodiment described above as a semiconductor material forming a semiconductor region that exhibits a light-to-electricity conversion effect. This achieves high optical power feeding efficiency.
  • optical power feeding system 1B configured as described above can also provide the same effects as the first embodiment. Furthermore, various modifications similar to those of the first embodiment can be applied to the optical power feeding system 1B.
  • the optical power supply system is Equipped with a power supply device and a power receiving device
  • the power supply device includes a light emitting unit that outputs power supply light, and a power supply control unit
  • the power receiving device includes a first light receiving section that converts the incident power feeding light into electric power, a second light receiving section that converts the incident power feeding light into an electrical signal, and a second light receiving section that converts the incident power feeding light into electric power.
  • the power supply control unit is configured to apply the power supply light to a first irradiation state in which at least the first light receiving unit is irradiated, and a state in which both the first light receiving unit and the second light receiving unit are irradiated with the power supply light, and and a second irradiation state in which the irradiated area of the second light receiving section is larger than that of the second irradiation state.
  • the second irradiation state includes a plurality of irradiation states in which the irradiated area of the second light receiving section is different from each other.
  • Each of the light emitting section, the first light receiving section, and the second light receiving section is a photoelectric conversion element including a laser medium having a laser wavelength of 500 nm or less.
  • the power supply device is comprising a light emitting section that outputs the power feeding light toward a first light receiving section and a second light receiving section that convert the incident power feeding light into electricity, and a power feeding control section
  • the power supply control unit is configured to apply the power supply light to a first irradiation state in which at least the first light receiving unit is irradiated, and a state in which both the first light receiving unit and the second light receiving unit are irradiated with the power supply light, and and a second irradiation state in which the irradiated area of the second light receiving section is larger than that of the second irradiation state.
  • the power supply control unit switches the power supply light between the first irradiation state and the second irradiation state by adjusting the focus of the power supply light.
  • the power supply control section switches the power supply light between the first irradiation state and the second irradiation state while keeping the output of the light emitting section constant.
  • the power receiving device is a first light receiving section that converts the incident power supply light into electric power; a second light receiving unit that converts the incident power supply light into an electrical signal; a demodulation unit that demodulates the electrical signal converted by the second light receiving unit to obtain information; Equipped with The first light receiving section and the second light receiving section are arranged in parallel, and a first irradiation state in which the power feeding light is irradiated to at least the first light receiving section; and a first irradiation state in which the power feeding light is irradiated to both the first light receiving section and the second light receiving section; A second irradiation state in which the irradiated area of the second light receiving section is large can be taken.
  • the first light receiving section and the second light receiving section are arranged side by side with their light receiving surfaces in contact with each other.
  • the first light receiving section and the second light receiving section are arranged side by side with a gap interposed between their light receiving surfaces.
  • the present invention is useful for simultaneously transmitting power and information via power supply light.
  • Optical power supply system 110 Power supply device 111 Power supply semiconductor laser (light emitting part) 112 Power supply light 114 Signal 115 Lens 116 Lens drive section 150 Power supply control section 310 Power receiving device 311 Light receiving section 311a First light receiving section 311af Light receiving surface 311b Second light receiving section 311bf Light receiving surface 370 Demodulation circuit (demodulation section) CL Gap S1 First irradiation state S2 Second irradiation state

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Power Engineering (AREA)
  • Optical Communication System (AREA)

Abstract

Ce système d'alimentation électrique optique comprend un dispositif d'alimentation électrique et un dispositif de réception d'énergie. Le dispositif d'alimentation électrique a une unité électroluminescente qui délivre une lumière d'alimentation électrique, et une unité de commande d'alimentation électrique. Le dispositif de réception de l'énergie comporte une première unité de réception de la lumière qui convertit la lumière incidente de l'alimentation en énergie électrique, une deuxième unité de réception de la lumière qui convertit la lumière incidente de l'alimentation en un signal électrique, et une unité de démodulation qui démodule le signal électrique obtenu par conversion par la deuxième unité de réception de la lumière et acquiert des informations. L'unité de commande de l'alimentation électrique passe d'un premier état d'irradiation, dans lequel au moins la première unité réceptrice de lumière est irradiée par la lumière de l'alimentation électrique, à un second état d'irradiation, dans lequel la première unité réceptrice de lumière et la seconde unité réceptrice de lumière sont irradiées par la lumière de l'alimentation électrique et dans lequel la zone irradiée de la seconde unité réceptrice de lumière est plus grande que dans le premier état d'irradiation.
PCT/JP2023/022220 2022-06-20 2023-06-15 Système d'alimentation électrique, dispositif d'alimentation électrique et dispositif de réception d'énergie WO2023248916A1 (fr)

Applications Claiming Priority (2)

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JP2022-098858 2022-06-20
JP2022098858A JP2024000207A (ja) 2022-06-20 2022-06-20 光給電システム、給電装置及び受電装置

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08138185A (ja) * 1994-11-10 1996-05-31 Fuji Electric Co Ltd 光信号伝送装置
JP2005005996A (ja) * 2003-06-11 2005-01-06 Nippon Telegr & Teleph Corp <Ntt> 光送受信システム及び受信端末
WO2008111337A1 (fr) * 2007-03-13 2008-09-18 Kabushiki Kaisha Toshiba Dispositif de réception pour une communication par lumière visible et système de communication par lumière visible
WO2022107339A1 (fr) * 2020-11-20 2022-05-27 日本電信電話株式会社 Système d'alimentation électrique optique, dispositif de communication optique côté réception d'energie et procédé de transfert de données

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08138185A (ja) * 1994-11-10 1996-05-31 Fuji Electric Co Ltd 光信号伝送装置
JP2005005996A (ja) * 2003-06-11 2005-01-06 Nippon Telegr & Teleph Corp <Ntt> 光送受信システム及び受信端末
WO2008111337A1 (fr) * 2007-03-13 2008-09-18 Kabushiki Kaisha Toshiba Dispositif de réception pour une communication par lumière visible et système de communication par lumière visible
WO2022107339A1 (fr) * 2020-11-20 2022-05-27 日本電信電話株式会社 Système d'alimentation électrique optique, dispositif de communication optique côté réception d'energie et procédé de transfert de données

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