WO2021230020A1 - Imaging device, control method, and program - Google Patents

Imaging device, control method, and program Download PDF

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Publication number
WO2021230020A1
WO2021230020A1 PCT/JP2021/016052 JP2021016052W WO2021230020A1 WO 2021230020 A1 WO2021230020 A1 WO 2021230020A1 JP 2021016052 W JP2021016052 W JP 2021016052W WO 2021230020 A1 WO2021230020 A1 WO 2021230020A1
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WO
WIPO (PCT)
Prior art keywords
power
image pickup
power supply
distance
battery
Prior art date
Application number
PCT/JP2021/016052
Other languages
French (fr)
Japanese (ja)
Inventor
智 池田
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ソニーグループ株式会社
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Publication date
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Publication of WO2021230020A1 publication Critical patent/WO2021230020A1/en

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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
    • H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
    • 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
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • This disclosure relates to an image pickup device, a control method and a program.
  • an electronic device provided with a power receiving circuit, a measuring means, and a control means measures the power consumption of the electronic device, and when the power consumption is the first value or less, the power receiving by the power receiving circuit is stopped to be wireless.
  • Patent Document 1 it was not possible to control the wireless power supply according to the distance between the devices that perform the wireless power supply.
  • one of the purposes of the present disclosure is to provide an image pickup device, a control method, and a program for more efficiently supplying power by wireless communication.
  • the present disclosure is, for example, An image pickup device that receives power from a power supply device via wireless communication.
  • the image pickup device includes a charge power supply control unit, and the charge power supply control unit is an image pickup device that determines a power receiving method according to the distance between the image pickup device and the power supply device.
  • the present disclosure is, for example, It is a control method of an image pickup device that receives power from a power supply device by wireless communication. This is a control method in which the charge power supply control unit of the image pickup device determines the power receiving method according to the distance between the image pickup device and the power supply device.
  • the present disclosure is, for example, It is a program that causes a computer to execute a control method for an image pickup device that receives power from a power supply device via wireless communication.
  • the charge power supply control unit of the image pickup device is a program that determines the power receiving method according to the distance between the image pickup device and the power supply device.
  • FIG. 1 is a diagram showing a configuration example of a wireless power feeding system according to the present embodiment.
  • FIG. 2 is a diagram showing a configuration example of the power feeding device according to the present embodiment.
  • FIG. 3 is a diagram showing a configuration example of the image pickup apparatus according to the present embodiment.
  • FIG. 4 is a diagram referred to when the power feeding method is described.
  • FIG. 5 is a diagram referred to when the charging / feeding method is described.
  • FIG. 6 is a diagram referred to when an operation example of the image pickup apparatus according to the first embodiment is described.
  • FIG. 7 is a diagram for explaining points such as differences in power consumption in each operation mode.
  • FIG. 8 is a diagram for explaining the point that the transmittable distance and the method determination threshold value corresponding to each operation mode are set.
  • FIG. 9 is a flowchart illustrating a flow of processing performed by the image pickup apparatus according to the second embodiment.
  • FIG. 10 is a diagram for explaining another example of setting the image pickup apparatus.
  • 11A and 11B are diagrams for explaining a modification.
  • FIG. 12 is a diagram for explaining a modified example.
  • FIG. 13 is a diagram for explaining a modified example.
  • FIG. 1 is a diagram showing a configuration example of a wireless power supply system (wireless power supply system 1) according to the present embodiment.
  • the wireless power feeding system 1 has a power feeding device 2 and an image pickup device 3 as a power receiving device. It is possible to wirelessly supply electric power from the power feeding device 2 to the image pickup device 3. Further, commands and data can be exchanged between the power feeding device 2 and the image pickup device 3 by wireless communication.
  • the power feeding device 2 is, for example, of a size that can be carried by the user of the imaging device 3.
  • the power feeding method in the wireless power feeding system 1 is not particularly limited to an electromagnetic induction method, a magnetic field resonance method, an electric field coupling method, a radio wave receiving method, etc., and the power transmission circuit and the power receiving circuit described later have a configuration according to the power feeding method. doing.
  • a magnetic field resonance method (a method in which a capacitor is coupled to each of a power transmission coil and a power reception coil) capable of transmitting power over a relatively long distance (about several meters) will be described as an example.
  • FIG. 2 is a diagram showing a configuration example of the power feeding device 2 according to the present embodiment.
  • the power feeding device 2 has, for example, a control unit 21, a power transmission circuit 22, a communication unit 23, and a battery 24.
  • the control unit 21 has a battery control unit 21A as a functional block.
  • the control unit 21 is composed of a CPU (Central Processing Unit) and the like, and controls the power supply device 2 in an integrated manner.
  • the control unit 21 has a ROM (Read Only Memory) and a RAM (Random Access Memory) (these are not shown).
  • a program executed by the control unit 21 is stored in the ROM.
  • the RAM is used as a work memory or the like when a program is executed by the control unit 21.
  • the battery control unit 21A included in the control unit 21 controls the battery 24. As control, charge / discharge management of the battery 24, protection operation for ensuring the safety of the battery 24 (operation for preventing overcharging and overdischarging) and the like are performed.
  • the power transmission circuit 22 is a circuit that transmits (transmits) wireless power to the image pickup device 3.
  • the power transmission circuit 22 includes, for example, an LC circuit in which a coil and a capacitor are connected in series.
  • the communication unit 23 is configured to perform wireless communication with the image pickup device 3, and includes a modulation / demodulation circuit and the like according to the communication method.
  • Examples of wireless communication include LAN (Local Area Network), Bluetooth (registered trademark), Wi-Fi (registered trademark), WUSB (WirelessUSB) and the like. Commands and data are transmitted and received to and from the image pickup apparatus 3 via the communication unit 23.
  • the battery 24 is, for example, a rechargeable secondary battery, and more specifically, a lithium ion secondary battery. As the battery 24, another battery such as a nickel hydrogen battery may be applied.
  • FIG. 3 is a diagram showing a configuration example of the image pickup apparatus 3 according to the present embodiment.
  • the image pickup apparatus 3 has, for example, a control unit 31, a power receiving circuit 32, a communication unit 33, a battery 34, a distance detection unit 35, and a remaining capacity detection unit 36.
  • the control unit 31 has a battery control unit 31A as a functional block.
  • the control unit 31 is composed of a CPU and the like, and controls the image pickup apparatus 3 in an integrated manner.
  • the control unit 31 has a ROM and a RAM (these are not shown).
  • a program executed by the control unit 31 is stored in the ROM.
  • the RAM is used as a work memory or the like when a program is executed by the control unit 31.
  • the battery control unit 31A included in the control unit 31 controls the battery 34.
  • the control includes charge / discharge management of the battery 34, a protective operation for ensuring the safety of the battery 34 (an operation of preventing overcharging and overdischarging), and the like.
  • the power receiving circuit 32 is a circuit that receives electric power transmitted wirelessly from the power feeding device 2.
  • the power receiving circuit 32 includes, for example, an LC circuit in which a coil and a capacitor are connected in series.
  • the communication unit 33 is configured to perform wireless communication with the power supply device 2, and includes a modulation / demodulation circuit and the like according to the communication method.
  • Examples of wireless communication include LAN, Bluetooth (registered trademark), Wi-Fi (registered trademark), WUSB and the like. Commands and data are transmitted and received to and from the power supply device 2 via the communication unit 33.
  • the battery 34 is, for example, a rechargeable secondary battery, and more specifically, a lithium ion secondary battery. As the battery 34, another battery such as a nickel hydrogen battery may be applied.
  • the distance detection unit 35 is a sensor that detects the distance to the power feeding device 2. Examples of the distance detection unit 35 include a stereo camera, a ToF (Time of Flight) sensor, a LiDAR (Light Detection and Ringing) sensor, and the like. The distance information detected by the distance detection unit 35 is supplied to the control unit 31.
  • the remaining capacity detection unit 36 detects the remaining capacity of the battery 34.
  • the remaining capacity of the battery 34 is defined by, for example, SOC (State of Charge).
  • SOC State of Charge
  • the image pickup device 3 has an image signal processing circuit, a display unit, a lens drive mechanism, and the like, but these are not shown.
  • the power receiving unit 3A includes, for example, a control unit 31, a power receiving circuit 32, a communication unit 33, a distance detecting unit 35, and a remaining capacity detecting unit 36.
  • the power receiving unit 3A may include a configuration (image signal processing circuit, display unit, lens driving mechanism, etc.), which is not shown in FIG.
  • the battery control unit 31A functions as a charge / power supply control unit. That is, the battery control unit 31A determines a method (power receiving method) for how the power received from the power feeding device 2 is supplied to the power receiving unit 3A to the power receiving unit 3A. Then, the battery control unit 31A performs control corresponding to the determined power receiving method. Specifically, the battery control unit 31A determines the power receiving method according to the distance between the image pickup device 3 and the power feeding device 2.
  • the power receiving method includes a power feeding method and a charging power feeding method, and in the present embodiment, the charging method and a method in which power is not supplied are included.
  • the power supply method is a method in which the power transmitted wirelessly from the power supply device 2 and received by the power receiving circuit 32 is supplied to the power receiving unit 3A without going through the battery 34.
  • the battery control unit 31A appropriately controls the power transmitted wirelessly from the power supply device 2 so that the power is supplied to the power receiving unit 3A without going through the battery 34.
  • the charge power supply method is a method of supplying power to the power receiving unit 3A while charging the battery 34 with the power transmitted from the power supply device 2.
  • As one pattern of the charge power supply method as shown in FIG. 5A, the power output from the battery 34 is received while the battery 34 is charged by the power transmitted from the power supply device 2 and received by the power receiving circuit 32. This is a method of supplying to the unit 3A.
  • the power supply device 2 is charged with a predetermined ratio of the electric power transmitted from the power supply device 2 and received by the power receiving circuit 32. This is a method of supplying the power transmitted from the power receiving unit 3A to the power receiving unit 3A.
  • the ratio of the electric power used for charging the battery 34 is appropriately set so that the electric power for operating the electric power receiving unit 3A can be secured.
  • the battery control unit 31A performs appropriate control so that charging and feeding are performed by the method shown in FIG. 5A or FIG. 5B. Since the charging / feeding method shown in FIG. 5A involves charging / discharging of the battery 34, the charging / feeding method shown in FIG. 5B is preferable from the viewpoint of deterioration of the battery 34.
  • the charging method is a method in which the power received from the power feeding device 2 is used only for charging the battery 34 without supplying power to the power receiving unit 3A.
  • the method in which power is not supplied is a method in which power is not supplied from the power feeding device 2 to the image pickup device 3.
  • the power receiving circuit 32 of the image pickup device 3 may be built in the image pickup device 3 or may be detachable from the image pickup device 3.
  • the image pickup device 3 is used, for example, by the user's hand, or is used in a state of being fixed to a fixing device such as a tripod to take an image.
  • the power feeding device 2 is used, for example, so as to be located near the user's body. Specifically, the power feeding device 2 is used by hanging it from the user's neck, wrapping it around the waist or arm using a belt or the like, or attaching it to a bag.
  • the power feeding device 2 may be fixed at a predetermined place. For example, when shooting is performed at a predetermined place (press seat or the like) in a sports venue, the power feeding device 2 may be arranged in a fixed state in the vicinity thereof.
  • FIG. 6 is a diagram summarizing an example of the operation of the image pickup apparatus 3.
  • the distance between the power feeding device 2 and the image pickup device 3 is appropriately referred to as a distance D.
  • d1 is a distance to the power feeding device 2, and the distance is a transmittable distance at which the power receiving unit 3A can transmit the operable power.
  • Let d1 be the transmittable distance of the distance D.
  • d2 in FIG. 6 is a distance having a value smaller than the transmittable distance d1 and is a method determination threshold value for determining the power receiving method (hereinafter, is appropriately referred to as a method determination threshold value d2). ).
  • the power supply device 2 to the image pickup device 3 has a large power of a certain value or more. Can be transmitted.
  • the distance detection unit 35 of the image pickup device 3 detects the distance D to the power supply device 2.
  • the distance information which is the detection result, is supplied from the distance detection unit 35 to the control unit 31.
  • the battery control unit 31A determines the power supply method regardless of the remaining capacity of the battery 34, and powers the power receiving unit 3A by the power supply method. Is controlled to supply.
  • the reason why the power supply method is adopted is that the power supplied from the power supply device 2 can cover the operating power of the power receiving unit 3A, but the distance D is larger than the method determination threshold d2, that is, the power that can be transmitted from the power supply device 2. This is to prevent charging due to restrictions on the power consumption.
  • the distance D is within the transmittable distance d1 and smaller than the method determination threshold value d2, and the remaining capacity of the battery 34 detected by the remaining capacity detection unit 36 is a threshold value (for example, SOC 40%). If it is smaller than), the charge power supply method is determined, and the power supply to the power receiving unit 3A is controlled by the charge power supply method.
  • the reason why the charge power supply method is adopted is that the operating power of the power receiving unit 3A can be covered by the power transmitted from the power supply device 2, and the distance D is smaller than the method determination threshold d2, that is, compared with the power supply device 2. This is because a large amount of electric power can be supplied and the battery 34 can be efficiently charged.
  • the battery control unit 31A is a power supply system when the distance D is within the transmittable distance d1 and is smaller than the method determination threshold value d2, and when the remaining capacity of the battery 34 is larger than the threshold value (for example, SOC 70%). Is determined, and control is performed to supply power to the power receiving unit 3A by the power feeding method. In the case of this pattern, since the remaining capacity of the battery 34 is large, the power required by the power receiving unit 3A is supplied by the power transmitted from the power feeding device 2 without charging. As a result, the image pickup apparatus 3 can be used without using the battery 34 while maintaining the remaining capacity of the battery 34.
  • the threshold value for example, SOC 70%
  • a method of not supplying power may be determined as the power receiving method.
  • the battery control unit 31A issues a command to the power supply device 2, for example, to prevent the power supply device 2 from supplying power to the image pickup device 3. Send.
  • the distance D detected by the distance detection unit 35 while the image pickup apparatus 3 is off is larger than the transmittable distance d1, or when the power transmission is small, the distance is possible.
  • the charging method may be determined as the power receiving method.
  • an appropriate power supply method can be determined according to the distance D from the image pickup device 3 to the power supply device 2. Further, while operating the image pickup device 3, if there is a margin in the electric power transmitted from the power supply device 2, the battery 34 can be charged. Further, since the remaining capacity of the battery 34 can not be reduced as much as possible, the image pickup apparatus 3 can be used for a long time.
  • the matters described in the first embodiment such as the configuration of the power feeding device 2 and the image pickup device 3, can be applied to the second embodiment unless otherwise specified.
  • the second embodiment is different from the first embodiment in that the transmittable distance d1 and the method determination threshold value d2 are set to values according to the operation mode of the image pickup apparatus 3. be.
  • Examples of the operation mode that can be set in the image pickup apparatus 3 include a continuous shooting mode, a moving image mode for shooting a moving image, and a still image mode for shooting a still image.
  • the power required for the power receiving unit 3A to operate (hereinafter, appropriately referred to as power consumption) is different.
  • FIG. 7 is a diagram for explaining points such as different power consumption in each operation mode.
  • the vertical axis indicates power consumption
  • the horizontal axis indicates distance.
  • the still image mode consumes the least amount of power.
  • the transmittable distance d1 that can supply the power consumption in the continuous shooting mode is small, in other words, the distance D between the power feeding device 2 and the image pickup device 3 is short. Is required.
  • the transmittable distance d1 corresponding to the moving image mode may be larger than the transmittable distance d1 corresponding to the continuous shooting mode.
  • the transmittable distance d1 corresponding to the still image mode may be larger than the transmittable distance d1 corresponding to the moving image mode.
  • the method determination threshold d2 also differs. For example, when the distance D is set to a predetermined value, power can be supplied in the continuous shooting mode, but power enough to charge the battery 34 cannot be transmitted, that is, power supply by the power supply method is appropriate. On the other hand, since the power consumption is different even at the same distance, it is possible to charge the battery 34 while supplying power in the moving image mode, that is, the power supply by the charge power supply method is appropriate.
  • the operation mode of the image pickup apparatus 3 may be determined, and the transmittable distance d1 and the method determination threshold value d2 according to the operation mode may be determined.
  • the transmittable distance d1 and the method determination threshold value d2 according to the operation mode are stored in an appropriate memory in the image pickup apparatus 3 as a table, for example.
  • step ST11 the standby state is set for a predetermined period of time. After a lapse of a certain period of time, the process proceeds to step ST12.
  • step ST12 the control unit 31 of the image pickup device 3 determines the operation mode of the image pickup device 3 currently set. Then, the process proceeds to step ST13.
  • step ST13 the control unit 31 sets the transmittable distance d1 and the method determination threshold d2 corresponding to the operation mode determined in step ST12. In the subsequent processing, the transmittable distance d1 and the method determination threshold d2 set in this processing are used unless the operation mode is changed. Then, the process proceeds to step ST14.
  • step ST14 the distance D from the image pickup device 3 to the power supply device 2 is detected by the distance detection unit 35. Then, the process proceeds to step ST15.
  • step ST15 the transmittable distance d1 set in step ST13 and the distance D detected in step ST15 are compared. If the distance D is larger than the transmittable distance d1 (D> d1), the process proceeds to step ST16.
  • step ST16 since the distance D is larger than the transmittable distance d1, that is, the power supply device 2 cannot supply the power required by the power receiving unit 3A, the battery control unit 31A does not perform wireless power supply and uses the battery 34. Control not to charge. Further, the battery control unit 31A controls to supply the power from the battery 34 to the power receiving unit 3A. Then, the process returns to step ST11.
  • step ST15 If the distance D is equal to or less than the transmittable distance d1 in step ST15, the process proceeds to step ST17.
  • step ST17 it is determined whether or not the distance D is equal to or less than the transmittable distance d1 and larger than the method determination threshold d2 (d2 ⁇ D ⁇ d1). If the determination result is Yes, the process is stepped. Proceed to ST18.
  • step ST18 the battery control unit 31A determines the power supply method as the method of supplying power to the power receiving unit 3A, and performs control corresponding to the power supply method. Then, the process returns to step ST11.
  • step ST19 it is determined whether or not the remaining capacity of the battery 34 detected by the remaining capacity detecting unit 36 is larger than the threshold value X%. If the remaining capacity of the battery 34 is larger than the threshold value X%, the process proceeds to step ST18. Since the processing contents of step ST18 are described above, they will be omitted. If the determination result in step ST19 is that the remaining capacity of the battery 34 is equal to or less than the threshold value X%, the process proceeds to step ST20.
  • step ST20 the battery control unit 31A determines the charge power supply method as the method of supplying power to the power receiving unit 3A, and performs control corresponding to the charge power supply method. Then, the process returns to step ST11.
  • the transmittable distance d1 and the method determination threshold value d2 can be appropriately set according to the settings of the image pickup apparatus 3. Therefore, even when the operation mode of the image pickup apparatus 3 having a large power consumption is set, the transmittable distance d1 and the like are appropriately set, so that the operating power of the power receiving unit 3A becomes insufficient and the operation of the image pickup apparatus 3 is stopped. It is possible to prevent this from happening. Moreover, the same effect as that of the first embodiment can be obtained.
  • the transmittable distance d1 and the method determination threshold value d2 may be set depending on the setting in the operation mode of the image pickup apparatus 3.
  • the setting of the continuous shooting mode for example, the number of continuous shootings per second can be increased. The larger the number of continuous shots, the higher the power consumption.
  • the setting of the moving image mode includes the image quality (resolution) of the moving image. The higher the image quality of the moving image, the higher the power consumption.
  • the setting of the still image mode includes the image quality of the live view. The higher the image quality of the live view, the higher the power consumption.
  • the transmittable distance d1 and the method determination threshold value d2 may be set according to the settings in each operation mode.
  • 20 fps frames per second
  • 10 fps and 5 fps are exemplified as the continuous shooting mode.
  • 4k30p progressive
  • FHD Full Definition
  • FHD60p are exemplified as High image quality and standard image quality.
  • the image pickup device 3 may have a plurality of batteries.
  • the image pickup apparatus 3 may have a battery 34A and a battery 34B.
  • the battery control unit 31A supplies power from another battery to the power receiving unit 3A while charging the predetermined battery. Control may be performed.
  • power is supplied from the battery 34A having a large remaining capacity to the power receiving unit 3A, and the battery 34B having a small remaining capacity is charged using the power transmitted from the power feeding device 2. Will be.
  • the image pickup device 3 may have three or more batteries.
  • the battery control unit 31A controls the power receiving unit 3A so that power is supplied only from the battery 34 to the power receiving unit 3A when the efficiency of the power transmitted from the power feeding device 2 is equal to or less than a predetermined value. May be good.
  • the power supply device 2 transmits the transmission power information indicating the power transmitted by itself to the arithmetic unit 4 by the communication unit 23.
  • the image pickup apparatus 3 transmits the received power information indicating the electric power received by itself to the arithmetic unit 4 by the communication unit 23.
  • the arithmetic unit 4 has a power efficiency arithmetic unit 41.
  • the power efficiency calculation unit 41 calculates the power efficiency based on (received power information / transmitted power information). Then, the power efficiency information indicating the calculated power efficiency is transmitted to the battery control unit 31A of the image pickup apparatus 3. As shown in FIG. 13, when the power efficiency becomes a predetermined value or less, the power transmission from the power feeding device 2 is turned off.
  • the battery control unit 31A controls the power receiving unit 3A so that power is supplied only from the battery 34.
  • the function of the arithmetic unit 4 may be possessed by the power feeding device 2, the image pickup device 3, or another device.
  • the distance D may be estimated from the usage state of the image pickup device 3 without the image pickup device 3 having the distance detection unit 35.
  • the mounting position is roughly determined. Therefore, the distance between the mounting position and the position according to the usage state of the image pickup device 3 can be measured in advance. , The distance D can be estimated from the usage state of the image pickup apparatus 3.
  • the power supply device 2 is attached so as to hang from the neck.
  • the position of the power feeding device 2 is located near the chest.
  • the usage state of the image pickup apparatus 3 can be determined according to the position of the sensor, the display unit, and the like. For example, based on the detection result of the pupil sensor, it can be determined that the user is using while looking into the finder of the image pickup apparatus 3. If the distance between the position of the image pickup device 3 and the approximate position of the power supply device 2 in the usage state is measured and registered in advance, the usage state of the image pickup device 3 can be changed even without the distance detection unit 35.
  • the distance D can be estimated when the device is used while looking through the finder.
  • the orientation of the display unit of the image pickup device 3 is set to be the same as the shooting direction, it is determined that the usage state of the image pickup device 3 is self-shooting (reaching a hand to shoot oneself). Is also possible. If the distance between the position of the image pickup device 3 and the approximate position of the power supply device 2 in such a usage state is measured and registered in advance, the usage state of the image pickup device 3 can be obtained even without the distance detection unit 35. The distance D in the case of self-shooting can be estimated.
  • the method determination threshold value may be a plurality of threshold values having a margin in order to prevent frequent switching of the power supply method.
  • the image pickup device may be an electronic device such as a smartphone having a built-in image pickup function.
  • the present disclosure may also adopt the following configuration.
  • An image pickup device that receives power from a power supply device via wireless communication.
  • the image pickup device includes a charge power supply control unit, and the charge power supply control unit determines a power receiving method according to a distance between the image pickup device and the power supply device.
  • the charge power supply control unit further determines the power receiving method according to the remaining capacity of the battery.
  • the power feeding method is a power receiving method in which the power supplied from the power feeding device is supplied to the power receiving unit without going through the battery.
  • the charge power supply method is a method of supplying the power from the battery to the power receiving unit while charging the battery with the power supplied from the power supply device, or the battery using the power supplied from the power supply device.
  • the image pickup device according to (3) or (4) which is a power receiving method for supplying power from the power receiving device to the power receiving unit while charging the power receiving device.
  • the charge power supply control unit is When the distance to the power supply device is the transmittable distance at which the power receiving unit can transmit the operable power and is larger than the method determination threshold value, the power supply method is determined as the power receiving method (the power receiving method is determined).
  • the image pickup apparatus according to any one of 3) to (5).
  • the charge power supply control unit is When the distance to the power feeding device is a transmittable distance capable of transmitting the power that the power receiving unit can operate, and the distance is smaller than the threshold for determining the method and the remaining capacity of the battery is smaller than the predetermined value, the power receiving device is received.
  • the imaging device according to any one of (3) to (6), which determines the charging power supply method as the method.
  • the charge power supply control unit is When the distance to the power feeding device is a transmittable distance capable of transmitting the power that the power receiving unit can operate, and the distance is smaller than the threshold for determining the method and the remaining capacity of the battery is larger than a predetermined value, the power receiving device is received.
  • the image pickup apparatus according to any one of 3 to (7), wherein the power feeding method is determined as the method.
  • Imaging device (11) The imaging device according to (10), wherein the operation modes are a continuous shooting mode, a moving image mode, and a still image mode in descending order of power consumption.
  • the image pickup apparatus according to (10) or (11), wherein the power consumption increases as the number of continuous shots in the continuous shooting mode increases.
  • the image pickup apparatus according to any one of (10) to (12), wherein the higher the image quality in the moving image mode, the larger the power consumption.
  • the image pickup apparatus according to any one of (10) to (13), wherein the higher the image quality in the still image mode, the larger the power consumption.
  • the imaging device according to any one of (1) to (14), which has a distance detecting unit for detecting the distance to the power feeding device.
  • the imaging device according to any one of (1) to (14), wherein the distance is estimated from the usage state of the imaging device.
  • the charge / power supply control unit supplies power from another battery to the power receiving unit while charging a predetermined battery.
  • the image pickup apparatus according to any one of (1) to (16) for controlling.
  • the charge / discharge control unit controls the power receiving unit to be supplied with power from the battery when the efficiency of the power transmitted from the power feeding device is equal to or less than a predetermined value (1) to (17).
  • the image pickup device described in any of the above. (19) It is a control method of an image pickup device that receives power from a power supply device by wireless communication.
  • a control method in which a charging power supply control unit included in the image pickup device determines a power receiving method according to a distance between the image pickup device and the power supply device (20) It is a program that causes a computer to execute a control method for an image pickup device that receives power from a power supply device via wireless communication. A program in which the charge power supply control unit of the image pickup device determines a power receiving method according to the distance between the image pickup device and the power supply device.

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  • Engineering & Computer Science (AREA)
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Abstract

An imaging device receiving power from a power supply device through wireless communication, the imaging device being provided with a charge/power supply control unit, wherein the charge/power supply control unit determines a power reception method in accordance with the distance between the imaging device and the power supply device.

Description

撮像装置、制御方法およびプログラムImaging equipment, control methods and programs
　本開示は、撮像装置、制御方法およびプログラムに関する。 This disclosure relates to an image pickup device, a control method and a program.
　特許文献１は、受電回路、測定手段および制御手段を具備する電子機器は、電子機器の消費電力を測定し、消費電力が第１値以下の場合、前記受電回路による受電を停止することでワイヤレス給電を適応的に制御する技術を開示する。 In Patent Document 1, an electronic device provided with a power receiving circuit, a measuring means, and a control means measures the power consumption of the electronic device, and when the power consumption is the first value or less, the power receiving by the power receiving circuit is stopped to be wireless. Disclose technology for adaptively controlling power supply.
特開２０１７－１５１７４８号公報Japanese Unexamined Patent Publication No. 2017-151748
　しかしながら、特許文献１ではワイヤレス給電を行う機器間の距離に応じてワイヤレス給電を制御することができなかった。 However, in Patent Document 1, it was not possible to control the wireless power supply according to the distance between the devices that perform the wireless power supply.
　そこで、本開示では無線通信による電力供給をより効率的に行う撮像装置、制御方法およびプログラムを提供することを目的の一つとする。 Therefore, one of the purposes of the present disclosure is to provide an image pickup device, a control method, and a program for more efficiently supplying power by wireless communication.
　本開示は、例えば、
　無線通信により給電装置から受電する撮像装置であって、
　撮像装置は、充電給電制御部を含み、充電給電制御部は撮像装置と給電装置との距離に応じて受電方式を決定する
　撮像装置である。 The present disclosure is, for example,
An image pickup device that receives power from a power supply device via wireless communication.
The image pickup device includes a charge power supply control unit, and the charge power supply control unit is an image pickup device that determines a power receiving method according to the distance between the image pickup device and the power supply device.
　本開示は、例えば、
　無線通信により給電装置から受電する撮像装置の制御方法であって、
　撮像装置が有する充電給電制御部が、撮像装置と給電装置との距離に応じて受電方式を決定する
　制御方法である。 The present disclosure is, for example,
It is a control method of an image pickup device that receives power from a power supply device by wireless communication.
This is a control method in which the charge power supply control unit of the image pickup device determines the power receiving method according to the distance between the image pickup device and the power supply device.
　本開示は、例えば、
　無線通信により給電装置から受電する撮像装置の制御方法をコンピュータに実行させるプログラムであって、
　撮像装置が有する充電給電制御部が、撮像装置と給電装置との距離に応じて受電方式を決定する
　プログラムである。 The present disclosure is, for example,
It is a program that causes a computer to execute a control method for an image pickup device that receives power from a power supply device via wireless communication.
The charge power supply control unit of the image pickup device is a program that determines the power receiving method according to the distance between the image pickup device and the power supply device.
図１は、本実施形態に係るワイヤレス給電システムの構成例を示す図である。FIG. 1 is a diagram showing a configuration example of a wireless power feeding system according to the present embodiment. 図２は、本実施形態に係る給電装置の構成例を示す図である。FIG. 2 is a diagram showing a configuration example of the power feeding device according to the present embodiment. 図３は、本実施形態に係る撮像装置の構成例を示す図である。FIG. 3 is a diagram showing a configuration example of the image pickup apparatus according to the present embodiment. 図４は、給電方式に関する説明がなされる際に参照される図である。FIG. 4 is a diagram referred to when the power feeding method is described. 図５は、充電給電方式に関する説明がなされる際に参照される図である。FIG. 5 is a diagram referred to when the charging / feeding method is described. 図６は、第１の実施形態に係る撮像装置の動作例が説明される際に参照される図である。FIG. 6 is a diagram referred to when an operation example of the image pickup apparatus according to the first embodiment is described. 図７は、各動作モードにおいて消費電力が異なる点等を説明するための図である。FIG. 7 is a diagram for explaining points such as differences in power consumption in each operation mode. 図８は、各動作モードに対応する伝送可能距離および方式決定用閾値が設定される点を説明するための図である。FIG. 8 is a diagram for explaining the point that the transmittable distance and the method determination threshold value corresponding to each operation mode are set. 図９は、第２の実施形態に係る撮像装置で行われる処理の流れを説明するフローチャートである。FIG. 9 is a flowchart illustrating a flow of processing performed by the image pickup apparatus according to the second embodiment. 図１０は、撮像装置の設定の他の例を説明するための図である。FIG. 10 is a diagram for explaining another example of setting the image pickup apparatus. 図１１Ａおよび図１１Ｂは、変形例を説明するための図である。11A and 11B are diagrams for explaining a modification. 図１２は、変形例を説明するための図である。FIG. 12 is a diagram for explaining a modified example. 図１３は、変形例を説明するための図である。FIG. 13 is a diagram for explaining a modified example.
　以下、本開示の実施形態等について図面を参照しながらの説明がなされる。なお、説明は以下の順序で行う。
＜第１の実施形態＞
＜第２の実施形態＞
＜変形例＞
　以下に説明する実施形態等は本開示の好適な具体例であり、本開示の内容がこれらの実施形態等に限定されるものではない。 Hereinafter, embodiments and the like of the present disclosure will be described with reference to the drawings. The explanation will be given in the following order.
<First Embodiment>
<Second embodiment>
<Modification example>
The embodiments and the like described below are suitable specific examples of the present disclosure, and the contents of the present disclosure are not limited to these embodiments and the like.
＜第１の実施形態＞
［システムの構成例］
　図１は、本実施形態に係るワイヤレス給電システム（ワイヤレス給電システム１）の構成例を示す図である。ワイヤレス給電システム１は、給電装置２と、受電装置としての撮像装置３とを有している。給電装置２から撮像装置３に対して無線による電力供給が可能とされている。また、給電装置２と撮像装置３との間で、無線通信によるコマンドやデータのやり取りが可能とされている。給電装置２は、例えば、撮像装置３のユーザが可搬可能な程度の大きさである。 <First Embodiment>
[System configuration example]
FIG. 1 is a diagram showing a configuration example of a wireless power supply system (wireless power supply system 1) according to the present embodiment. The wireless power feeding system 1 has a power feeding device 2 and an image pickup device 3 as a power receiving device. It is possible to wirelessly supply electric power from the power feeding device 2 to the image pickup device 3. Further, commands and data can be exchanged between the power feeding device 2 and the image pickup device 3 by wireless communication. The power feeding device 2 is, for example, of a size that can be carried by the user of the imaging device 3.
　ワイヤレス給電システム１における給電方式は、電磁誘導方式、磁界共鳴方式、電界結合方式、電波受信方式等、特に限定されるものではなく、後述する送電回路および受電回路は給電方式に応じた構成を有している。なお、本実施形態では、比較的、長距離（数ｍ程度）の電力伝送が可能な磁界共鳴方式（送電コイルおよび受電コイルのそれぞれにキャパシタが結合された方式）を例にして説明する。 The power feeding method in the wireless power feeding system 1 is not particularly limited to an electromagnetic induction method, a magnetic field resonance method, an electric field coupling method, a radio wave receiving method, etc., and the power transmission circuit and the power receiving circuit described later have a configuration according to the power feeding method. doing. In this embodiment, a magnetic field resonance method (a method in which a capacitor is coupled to each of a power transmission coil and a power reception coil) capable of transmitting power over a relatively long distance (about several meters) will be described as an example.
［給電装置の構成例］
　図２は、本実施形態に係る給電装置２の構成例を示す図である。給電装置２は、例えば、制御部２１、送電回路２２、通信部２３および電池２４を有している。制御部２１は、機能ブロックとして電池制御部２１Ａを有している。 [Configuration example of power supply device]
FIG. 2 is a diagram showing a configuration example of the power feeding device 2 according to the present embodiment. The power feeding device 2 has, for example, a control unit 21, a power transmission circuit 22, a communication unit 23, and a battery 24. The control unit 21 has a battery control unit 21A as a functional block.
　制御部２１は、ＣＰＵ（Central Processing Unit）等から構成されており、給電装置２を統括的に制御する。制御部２１は、ＲＯＭ(Read Only Memory)やＲＡＭ(Random Access Memory)を有している（これらの図示は省略している。）。ＲＯＭには制御部２１によって実行されるプログラムが格納されている。ＲＡＭは、制御部２１によってプログラムが実行される際のワークメモリ等として使用される。 The control unit 21 is composed of a CPU (Central Processing Unit) and the like, and controls the power supply device 2 in an integrated manner. The control unit 21 has a ROM (Read Only Memory) and a RAM (Random Access Memory) (these are not shown). A program executed by the control unit 21 is stored in the ROM. The RAM is used as a work memory or the like when a program is executed by the control unit 21.
　制御部２１が有する電池制御部２１Ａは、電池２４に対する制御を行う。制御としては、電池２４の充放電管理、電池２４の安全性を確保するための保護動作（過充電や過放電を防止する動作）等を行う。 The battery control unit 21A included in the control unit 21 controls the battery 24. As control, charge / discharge management of the battery 24, protection operation for ensuring the safety of the battery 24 (operation for preventing overcharging and overdischarging) and the like are performed.
　送電回路２２は、撮像装置３に対して無線による電力を伝送（送信）する回路である。送電回路２２は、例えば、コイルとキャパシタとが直列に接続されたＬＣ回路を含む。 The power transmission circuit 22 is a circuit that transmits (transmits) wireless power to the image pickup device 3. The power transmission circuit 22 includes, for example, an LC circuit in which a coil and a capacitor are connected in series.
　通信部２３は、撮像装置３と無線通信を行う構成であり、通信方式に応じた変復調回路等を含む。無線通信としては、ＬＡＮ（Local Area Network）、Ｂｌｕｅｔｏｏｔｈ（登録商標）、Ｗｉ－Ｆｉ（登録商標）、またはＷＵＳＢ（Wireless USB）等が挙げられる。通信部２３を介して、撮像装置３との間でのコマンドやデータの送受信が行われる。 The communication unit 23 is configured to perform wireless communication with the image pickup device 3, and includes a modulation / demodulation circuit and the like according to the communication method. Examples of wireless communication include LAN (Local Area Network), Bluetooth (registered trademark), Wi-Fi (registered trademark), WUSB (WirelessUSB) and the like. Commands and data are transmitted and received to and from the image pickup apparatus 3 via the communication unit 23.
　電池２４は、例えば、充電可能な二次電池であり、より具体的には、リチウムイオン二次電池である。電池２４として、ニッケル水素電池等の他の電池が適用されてもよい。 The battery 24 is, for example, a rechargeable secondary battery, and more specifically, a lithium ion secondary battery. As the battery 24, another battery such as a nickel hydrogen battery may be applied.
［撮像装置の構成例］
　図３は、本実施形態に係る撮像装置３の構成例を示す図である。撮像装置３は、例えば、制御部３１、受電回路３２、通信部３３、電池３４、距離検出部３５および残容量検出部３６を有している。制御部３１は、機能ブロックとして電池制御部３１Ａを有している。 [Configuration example of image pickup device]
FIG. 3 is a diagram showing a configuration example of the image pickup apparatus 3 according to the present embodiment. The image pickup apparatus 3 has, for example, a control unit 31, a power receiving circuit 32, a communication unit 33, a battery 34, a distance detection unit 35, and a remaining capacity detection unit 36. The control unit 31 has a battery control unit 31A as a functional block.
　制御部３１は、ＣＰＵ等から構成されており、撮像装置３を統括的に制御する。制御部３１は、ＲＯＭやＲＡＭを有している（これらの図示は省略している。）。ＲＯＭには制御部３１によって実行されるプログラムが格納されている。ＲＡＭは、制御部３１によってプログラムが実行される際のワークメモリ等として使用される。 The control unit 31 is composed of a CPU and the like, and controls the image pickup apparatus 3 in an integrated manner. The control unit 31 has a ROM and a RAM (these are not shown). A program executed by the control unit 31 is stored in the ROM. The RAM is used as a work memory or the like when a program is executed by the control unit 31.
　制御部３１が有する電池制御部３１Ａは、電池３４に対する制御を行う。制御としては、電池３４の充放電管理、電池３４の安全性を確保するための保護動作（過充電や過放電を防止する動作）等を行う。 The battery control unit 31A included in the control unit 31 controls the battery 34. The control includes charge / discharge management of the battery 34, a protective operation for ensuring the safety of the battery 34 (an operation of preventing overcharging and overdischarging), and the like.
　受電回路３２は、給電装置２から無線により伝送された電力を受信する回路である。受電回路３２は、例えば、コイルとキャパシタとが直列に接続されたＬＣ回路を含む。 The power receiving circuit 32 is a circuit that receives electric power transmitted wirelessly from the power feeding device 2. The power receiving circuit 32 includes, for example, an LC circuit in which a coil and a capacitor are connected in series.
　通信部３３は、給電装置２と無線通信を行う構成であり、通信方式に応じた変復調回路等を含む。無線通信としては、ＬＡＮ、Ｂｌｕｅｔｏｏｔｈ（登録商標）、Ｗｉ－Ｆｉ（登録商標）、またはＷＵＳＢ等が挙げられる。通信部３３を介して、給電装置２との間でのコマンドやデータの送受信が行われる。 The communication unit 33 is configured to perform wireless communication with the power supply device 2, and includes a modulation / demodulation circuit and the like according to the communication method. Examples of wireless communication include LAN, Bluetooth (registered trademark), Wi-Fi (registered trademark), WUSB and the like. Commands and data are transmitted and received to and from the power supply device 2 via the communication unit 33.
　電池３４は、例えば、充電可能な二次電池であり、より具体的には、リチウムイオン二次電池である。電池３４として、ニッケル水素電池等の他の電池が適用されてもよい。 The battery 34 is, for example, a rechargeable secondary battery, and more specifically, a lithium ion secondary battery. As the battery 34, another battery such as a nickel hydrogen battery may be applied.
　距離検出部３５は、給電装置２までの距離を検出するセンサである。距離検出部３５としては、ステレオカメラ、ＴｏＦ(Time of Flight)センサ、ＬｉＤＡＲ(Light Detection and Ranging)センサ等を挙げることができる。距離検出部３５により検出された距離情報が制御部３１に供給される。 The distance detection unit 35 is a sensor that detects the distance to the power feeding device 2. Examples of the distance detection unit 35 include a stereo camera, a ToF (Time of Flight) sensor, a LiDAR (Light Detection and Ringing) sensor, and the like. The distance information detected by the distance detection unit 35 is supplied to the control unit 31.
　残容量検出部３６は、電池３４の残容量を検出する。電池３４の残容量は、例えば、ＳＯＣ(State of Charge)により規定される。検出された残容量が制御部３１に供給される。 The remaining capacity detection unit 36 detects the remaining capacity of the battery 34. The remaining capacity of the battery 34 is defined by, for example, SOC (State of Charge). The detected remaining capacity is supplied to the control unit 31.
　なお、上述した構成の他にも、撮像装置３は、画像信号処理回路、表示部、レンズ駆動機構等を有しているが、これらの図示は省略している。 In addition to the above-described configuration, the image pickup device 3 has an image signal processing circuit, a display unit, a lens drive mechanism, and the like, but these are not shown.
（電力受電部について）
　以下の説明において、撮像装置３において電力供給の対象となる負荷を電力受電部３Ａと適宜、称する。電力受電部３Ａは、例えば、制御部３１、受電回路３２、通信部３３、距離検出部３５および残容量検出部３６を含む。図３において図示が省略された構成（画像信号処理回路、表示部、レンズ駆動機構等）が電力受電部３Ａに含まれていてもよい。 (About the power receiving unit)
In the following description, the load to be supplied with power in the image pickup apparatus 3 is appropriately referred to as a power receiving unit 3A. The power receiving unit 3A includes, for example, a control unit 31, a power receiving circuit 32, a communication unit 33, a distance detecting unit 35, and a remaining capacity detecting unit 36. The power receiving unit 3A may include a configuration (image signal processing circuit, display unit, lens driving mechanism, etc.), which is not shown in FIG.
（受電方式について）
　電池制御部３１Ａは、充電給電制御部として機能する。すなわち、電池制御部３１Ａは、電力受電部３Ａに対して、給電装置２から受電した電力をどのように電力受電部３Ａに供給するかについての方式（受電方式）を決定する。そして、電池制御部３１Ａは、決定した受電方式に対応する制御を行う。具体的には、電池制御部３１Ａは、撮像装置３と給電装置２との距離に応じて受電方式を決定する。受電方式は、給電方式および充電給電方式を含み、本実施形態では、充電方式および電力供給を行わない方式を含む。 (About the power receiving method)
The battery control unit 31A functions as a charge / power supply control unit. That is, the battery control unit 31A determines a method (power receiving method) for how the power received from the power feeding device 2 is supplied to the power receiving unit 3A to the power receiving unit 3A. Then, the battery control unit 31A performs control corresponding to the determined power receiving method. Specifically, the battery control unit 31A determines the power receiving method according to the distance between the image pickup device 3 and the power feeding device 2. The power receiving method includes a power feeding method and a charging power feeding method, and in the present embodiment, the charging method and a method in which power is not supplied are included.
　給電方式とは、図４に示すように、給電装置２から無線により伝送され、受電回路３２により受電された電力を、電池３４を介さずに電力受電部３Ａに供給する方式である。電池制御部３１Ａは、給電装置２から無線により伝送された電力が、電池３４を介さずに電力受電部３Ａに供給されるよう適宜な制御を行う。 As shown in FIG. 4, the power supply method is a method in which the power transmitted wirelessly from the power supply device 2 and received by the power receiving circuit 32 is supplied to the power receiving unit 3A without going through the battery 34. The battery control unit 31A appropriately controls the power transmitted wirelessly from the power supply device 2 so that the power is supplied to the power receiving unit 3A without going through the battery 34.
　充電給電方式とは、給電装置２から伝送された電力により電池３４を充電しつつ、電力受電部３Ａに電力を供給する方式である。充電給電方式としては、２つのパターンがあり得る。充電給電方式の一つのパターンとしては、図５Ａに示すように、給電装置２から伝送され、受電回路３２により受電された電力により電池３４を充電しつつ、電池３４から出力される電力を電力受電部３Ａに供給する方式である。充電給電方式の他のパターンとしては、図５Ｂに示すように、給電装置２から伝送され、受電回路３２により受電された電力のうち所定の割合の電力により電池３４を充電しつつ、給電装置２から伝送された電力を電力受電部３Ａに供給する方式である。この場合、電力受電部３Ａが動作するための電力を確保できるように、電池３４の充電に用いられる電力の割合が適切に設定される。電池制御部３１Ａは、図５Ａまたは図５Ｂに示す方式で充給電が行われるように適宜な制御を行う。なお、図５Ａに示す充電給電方式は、電池３４の充放電が伴うことから、電池３４の劣化の観点からは図５Ｂに示す充電給電方式の方が好ましい。 The charge power supply method is a method of supplying power to the power receiving unit 3A while charging the battery 34 with the power transmitted from the power supply device 2. There can be two patterns as the charging power supply method. As one pattern of the charge power supply method, as shown in FIG. 5A, the power output from the battery 34 is received while the battery 34 is charged by the power transmitted from the power supply device 2 and received by the power receiving circuit 32. This is a method of supplying to the unit 3A. As another pattern of the charge power supply method, as shown in FIG. 5B, the power supply device 2 is charged with a predetermined ratio of the electric power transmitted from the power supply device 2 and received by the power receiving circuit 32. This is a method of supplying the power transmitted from the power receiving unit 3A to the power receiving unit 3A. In this case, the ratio of the electric power used for charging the battery 34 is appropriately set so that the electric power for operating the electric power receiving unit 3A can be secured. The battery control unit 31A performs appropriate control so that charging and feeding are performed by the method shown in FIG. 5A or FIG. 5B. Since the charging / feeding method shown in FIG. 5A involves charging / discharging of the battery 34, the charging / feeding method shown in FIG. 5B is preferable from the viewpoint of deterioration of the battery 34.
　充電方式とは、電力受電部３Ａに対する電力供給を行わずに、給電装置２から受電した電力を電池３４の充電のみに用いる方式である。電力供給を行わない方式とは、給電装置２から撮像装置３に対して電力を供給しない方式である。 The charging method is a method in which the power received from the power feeding device 2 is used only for charging the battery 34 without supplying power to the power receiving unit 3A. The method in which power is not supplied is a method in which power is not supplied from the power feeding device 2 to the image pickup device 3.
［使用状態の一例］
　次に、給電装置２および撮像装置３の使用状態（ユースケース）の一例について説明する。撮像装置３の受電回路３２は、撮像装置３に内蔵されていてもよいし、撮像装置３に対して着脱自在とされてもよい。撮像装置３は例えばユーザの手にもって使用されたり、三脚等の固定器具に固定された状態で使用されて撮影がなされる。 [Example of usage status]
Next, an example of the usage state (use case) of the power feeding device 2 and the image pickup device 3 will be described. The power receiving circuit 32 of the image pickup device 3 may be built in the image pickup device 3 or may be detachable from the image pickup device 3. The image pickup device 3 is used, for example, by the user's hand, or is used in a state of being fixed to a fixing device such as a tripod to take an image.
　給電装置２は、例えば、ユーザの身体付近に位置するようにして用いられる。具体的には、給電装置２は、ユーザの首からぶら下げたり、ベルト等を用いて腰や腕に巻かれたり、鞄に装着されて用いられる。なお、給電装置２は、所定の場所に固定されていてもよい。例えば、スポーツ会場において撮影が所定の場所（記者席等）で行われる場合に、その近辺に給電装置２が固定された状態で配置されていてもよい。 The power feeding device 2 is used, for example, so as to be located near the user's body. Specifically, the power feeding device 2 is used by hanging it from the user's neck, wrapping it around the waist or arm using a belt or the like, or attaching it to a bag. The power feeding device 2 may be fixed at a predetermined place. For example, when shooting is performed at a predetermined place (press seat or the like) in a sports venue, the power feeding device 2 may be arranged in a fixed state in the vicinity thereof.
［動作］
　次に、本実施形態で行われる撮像装置３の動作の一例について説明する。 [motion]
Next, an example of the operation of the image pickup apparatus 3 performed in the present embodiment will be described.
　図６は、撮像装置３の動作の一例をまとめた図である。以下の説明では、給電装置２と撮像装置３との間の距離を距離Ｄと適宜、称する。図６におけるｄ１は、給電装置２までの距離であり、且つ、当該距離が、電力受電部３Ａが動作可能な電力を伝送可能な伝送可能距離である。距離Ｄのうちの伝送可能距離をｄ１とする。また、図６におけるｄ２は、伝送可能距離ｄ１よりも小さい値の距離であり、且つ、受電方式を決定するための方式決定用閾値である（以下では、方式決定用閾値ｄ２と適宜、称する。）。給電装置２と撮像装置３との間の距離（以下、距離Ｄと適宜、称する）が、方式決定用閾値ｄ２より小さい場合には、給電装置２から撮像装置３に対して一定以上の大電力が伝送可能とされる。 FIG. 6 is a diagram summarizing an example of the operation of the image pickup apparatus 3. In the following description, the distance between the power feeding device 2 and the image pickup device 3 is appropriately referred to as a distance D. In FIG. 6, d1 is a distance to the power feeding device 2, and the distance is a transmittable distance at which the power receiving unit 3A can transmit the operable power. Let d1 be the transmittable distance of the distance D. Further, d2 in FIG. 6 is a distance having a value smaller than the transmittable distance d1 and is a method determination threshold value for determining the power receiving method (hereinafter, is appropriately referred to as a method determination threshold value d2). ). When the distance between the power feeding device 2 and the image pickup device 3 (hereinafter, appropriately referred to as the distance D) is smaller than the method determination threshold value d2, the power supply device 2 to the image pickup device 3 has a large power of a certain value or more. Can be transmitted.
　撮像装置３の距離検出部３５は、給電装置２までの距離Ｄを検出する。検出結果である距離情報は、距離検出部３５から制御部３１に供給される。電池制御部３１Ａは、距離Ｄが伝送可能距離ｄ１以内であり方式決定用閾値ｄ２より大きい場合には、電池３４の残容量に関わらず給電方式を決定し、給電方式により電力受電部３Ａに電力を供給する制御を行う。給電方式が採用される理由は、給電装置２から供給される電力により電力受電部３Ａの動作電力を賄えるものの、距離Ｄが方式決定用閾値ｄ２より大きい、すなわち、給電装置２から伝送可能な電力に制約が生じることから充電を行わないようにするためである。 The distance detection unit 35 of the image pickup device 3 detects the distance D to the power supply device 2. The distance information, which is the detection result, is supplied from the distance detection unit 35 to the control unit 31. When the distance D is within the transmittable distance d1 and is larger than the method determination threshold value d2, the battery control unit 31A determines the power supply method regardless of the remaining capacity of the battery 34, and powers the power receiving unit 3A by the power supply method. Is controlled to supply. The reason why the power supply method is adopted is that the power supplied from the power supply device 2 can cover the operating power of the power receiving unit 3A, but the distance D is larger than the method determination threshold d2, that is, the power that can be transmitted from the power supply device 2. This is to prevent charging due to restrictions on the power consumption.
　電池制御部３１Ａは、距離Ｄが伝送可能距離ｄ１以内であり方式決定用閾値ｄ２より小さい場合であり、且つ、残容量検出部３６により検出された電池３４の残容量が閾値（例えば、ＳＯＣ４０％）より小さい場合には、充電給電方式を決定し、充電給電方式により電力受電部３Ａに電力を供給する制御を行う。充電給電方式が採用される理由は、給電装置２から伝送される電力により電力受電部３Ａの動作電力を賄え、且つ、距離Ｄが方式決定用閾値ｄ２より小さい、すなわち、給電装置２から比較的、大電力を供給することができ、電池３４に対する充電を効率的に行うことが可能となるからである。 In the battery control unit 31A, the distance D is within the transmittable distance d1 and smaller than the method determination threshold value d2, and the remaining capacity of the battery 34 detected by the remaining capacity detection unit 36 is a threshold value (for example, SOC 40%). If it is smaller than), the charge power supply method is determined, and the power supply to the power receiving unit 3A is controlled by the charge power supply method. The reason why the charge power supply method is adopted is that the operating power of the power receiving unit 3A can be covered by the power transmitted from the power supply device 2, and the distance D is smaller than the method determination threshold d2, that is, compared with the power supply device 2. This is because a large amount of electric power can be supplied and the battery 34 can be efficiently charged.
　電池制御部３１Ａは、距離Ｄが伝送可能距離ｄ１以内であり方式決定用閾値ｄ２より小さい場合であり、且つ、電池３４の残容量が閾値（例えば、ＳＯＣ７０％）より大きい場合には、給電方式を決定し、給電方式により電力受電部３Ａに電力を供給する制御を行う。本パターンの場合は、電池３４の残容量が大きいことから充電を行わずに、給電装置２から伝送される電力により電力受電部３Ａが必要とする電力を供給する。これにより、電池３４を使用することなく、電池３４の残容量を維持したまま撮像装置３を使用することができる。 The battery control unit 31A is a power supply system when the distance D is within the transmittable distance d1 and is smaller than the method determination threshold value d2, and when the remaining capacity of the battery 34 is larger than the threshold value (for example, SOC 70%). Is determined, and control is performed to supply power to the power receiving unit 3A by the power feeding method. In the case of this pattern, since the remaining capacity of the battery 34 is large, the power required by the power receiving unit 3A is supplied by the power transmitted from the power feeding device 2 without charging. As a result, the image pickup apparatus 3 can be used without using the battery 34 while maintaining the remaining capacity of the battery 34.
　なお、距離検出部３５により検出された距離Ｄが、伝送可能距離ｄ１より大きく電力の伝送が不可能な距離である場合には、受電方式として電力供給を行わない方式が決定されてもよい。電力供給を行わない方式が決定された場合、電池制御部３１Ａは、例えば、給電装置２に対して撮像装置３への電力供給を行わないようにするためのコマンドを、給電装置２に対して送信する。また、撮像装置３がオフの状態で距離検出部３５により検出された距離Ｄが、伝送可能距離ｄ１より大きい場合であっても、電力の伝送が小さくても可能な距離である場合には、受電方式として充電方式が決定されてもよい。 If the distance D detected by the distance detection unit 35 is larger than the transmittable distance d1 and the power cannot be transmitted, a method of not supplying power may be determined as the power receiving method. When a method for not supplying power is determined, the battery control unit 31A issues a command to the power supply device 2, for example, to prevent the power supply device 2 from supplying power to the image pickup device 3. Send. Further, when the distance D detected by the distance detection unit 35 while the image pickup apparatus 3 is off is larger than the transmittable distance d1, or when the power transmission is small, the distance is possible. The charging method may be determined as the power receiving method.
［本実施形態により得られる効果］
　以上説明した本実施形態によれば、撮像装置３から給電装置２までの距離Ｄに応じて適切な電力供給方式を決定することができる。また、撮像装置３を動作させつつ、給電装置２から伝送される電力に余裕がある場合には、電池３４を充電することができる。また、電池３４を残容量を極力減らさないことができるので、撮像装置３の長時間の使用が可能となる。 [Effects obtained by this embodiment]
According to the present embodiment described above, an appropriate power supply method can be determined according to the distance D from the image pickup device 3 to the power supply device 2. Further, while operating the image pickup device 3, if there is a margin in the electric power transmitted from the power supply device 2, the battery 34 can be charged. Further, since the remaining capacity of the battery 34 can not be reduced as much as possible, the image pickup apparatus 3 can be used for a long time.
＜第２の実施形態＞
　次に、第２の実施形態について説明する。なお、給電装置２や撮像装置３の構成等、第１の実施形態で説明した事項は、特に断らない限り、第２の実施形態に対して適用することができる。第２の実施形態は、概略的には、伝送可能距離ｄ１および方式決定用閾値ｄ２が、撮像装置３の動作モードに応じた値に設定される点が、第１の実施形態と異なる点である。 <Second embodiment>
Next, the second embodiment will be described. The matters described in the first embodiment, such as the configuration of the power feeding device 2 and the image pickup device 3, can be applied to the second embodiment unless otherwise specified. The second embodiment is different from the first embodiment in that the transmittable distance d1 and the method determination threshold value d2 are set to values according to the operation mode of the image pickup apparatus 3. be.
［動作モードに応じた消費電力について］
　撮像装置３に設定可能な動作モードとしては、例えば、連写モード、動画を撮影する動画モード、静止画を撮影する静止画モードが挙げられる。各動作モードでは、電力受電部３Ａが動作するために必要とする電力（以下、消費電力と適宜、称する）が異なる。 [About power consumption according to the operation mode]
Examples of the operation mode that can be set in the image pickup apparatus 3 include a continuous shooting mode, a moving image mode for shooting a moving image, and a still image mode for shooting a still image. In each operation mode, the power required for the power receiving unit 3A to operate (hereinafter, appropriately referred to as power consumption) is different.
　図７は、各動作モードにおいて消費電力が異なる点等を説明するための図である。図７において縦軸は消費電力を示し、横軸は距離を示す。動作モードには、消費電力が大きいモードと小さいモードとがあり、具体的には、上述した３つのモードのうち連写モードの消費電力が最も大きく、次に、動画モードの消費電力が大きく、静止画モードの消費電力が最も小さい。また、連写モードの消費電力が大きいことから、連写モードの消費電力を供給できる伝送可能距離ｄ１は小さくなる、換言すれば、給電装置２と撮像装置３との間の距離Ｄが近いことが必要となる。また、動画モードの消費電力は連写モードの消費電力より小さいことから、動画モードに対応する伝送可能距離ｄ１は、連写モードに対応する伝送可能距離ｄ１よりも大きくてもよい。また、静止画モードの消費電力が動画モードの消費電力より小さいことから、静止画モードに対応する伝送可能距離ｄ１は、動画モードに対応する伝送可能距離ｄ１よりも大きくてもよい。 FIG. 7 is a diagram for explaining points such as different power consumption in each operation mode. In FIG. 7, the vertical axis indicates power consumption, and the horizontal axis indicates distance. There are two operation modes, one is a mode with high power consumption and the other is a mode with low power consumption. The still image mode consumes the least amount of power. Further, since the power consumption in the continuous shooting mode is large, the transmittable distance d1 that can supply the power consumption in the continuous shooting mode is small, in other words, the distance D between the power feeding device 2 and the image pickup device 3 is short. Is required. Further, since the power consumption of the moving image mode is smaller than the power consumption of the continuous shooting mode, the transmittable distance d1 corresponding to the moving image mode may be larger than the transmittable distance d1 corresponding to the continuous shooting mode. Further, since the power consumption of the still image mode is smaller than the power consumption of the moving image mode, the transmittable distance d1 corresponding to the still image mode may be larger than the transmittable distance d1 corresponding to the moving image mode.
　また、動作モードに応じて消費電力が異なることから、方式決定用閾値ｄ２も異なる。例えば、距離Ｄを所定の値とした場合に、連写モードでは給電を行うことが可能であるものの、電池３４の充電を行うほどの電力を伝送できない、すなわち給電方式による電力供給が適切であるのに対して、同じ距離であっても消費電力が異なることから、動画モードでは給電を行いつつ、電池３４の充電を行うことも可能である、すなわち充電給電方式による電力供給が適切である。 Further, since the power consumption differs depending on the operation mode, the method determination threshold d2 also differs. For example, when the distance D is set to a predetermined value, power can be supplied in the continuous shooting mode, but power enough to charge the battery 34 cannot be transmitted, that is, power supply by the power supply method is appropriate. On the other hand, since the power consumption is different even at the same distance, it is possible to charge the battery 34 while supplying power in the moving image mode, that is, the power supply by the charge power supply method is appropriate.
　以上から、図８に模式的に示すように、撮像装置３の動作モードを判別し、動作モードに応じた伝送可能距離ｄ１および方式決定用閾値ｄ２を決定すればよい。動作モードに応じた伝送可能距離ｄ１および方式決定用閾値ｄ２は、例えば、テーブルとして撮像装置３内の適宜なメモリに記憶される。 From the above, as schematically shown in FIG. 8, the operation mode of the image pickup apparatus 3 may be determined, and the transmittable distance d1 and the method determination threshold value d2 according to the operation mode may be determined. The transmittable distance d1 and the method determination threshold value d2 according to the operation mode are stored in an appropriate memory in the image pickup apparatus 3 as a table, for example.
［動作］
　図９のフローチャートを参照しつつ、第２の実施形態に係る撮像装置３で行われる処理の流れを説明する。概略的に説明すれば、動作モードに応じた伝送可能距離ｄ１および方式決定用閾値ｄ２が設定される点以外は、第１の実施形態で説明した処理と同様の処理が行われる。なお、以下に示す処理の一部の順序が異なっていてもよいし、複数の処理が並列的に行われてもよい。 [motion]
The flow of processing performed by the image pickup apparatus 3 according to the second embodiment will be described with reference to the flowchart of FIG. Briefly, the same processing as described in the first embodiment is performed except that the transmittable distance d1 and the method determination threshold value d2 are set according to the operation mode. The order of some of the processes shown below may be different, or a plurality of processes may be performed in parallel.
　ステップＳＴ１１では、予め設定された一定時間、待機状態となる。一定時間の経過後、処理がステップＳＴ１２に進む。 In step ST11, the standby state is set for a predetermined period of time. After a lapse of a certain period of time, the process proceeds to step ST12.
　ステップＳＴ１２では、撮像装置３の制御部３１が現在設定されている撮像装置３の動作モードを判別する。そして、処理がステップＳＴ１３に進む。 In step ST12, the control unit 31 of the image pickup device 3 determines the operation mode of the image pickup device 3 currently set. Then, the process proceeds to step ST13.
　ステップＳＴ１３では、制御部３１が、ステップＳＴ１２で判別された動作モードに対応する伝送可能距離ｄ１および方式決定用閾値ｄ２を設定する。以降の処理では、動作モードが変更されない限り、本処理で設定された伝送可能距離ｄ１および方式決定用閾値ｄ２が用いられる。そして、処理がステップＳＴ１４に進む。 In step ST13, the control unit 31 sets the transmittable distance d1 and the method determination threshold d2 corresponding to the operation mode determined in step ST12. In the subsequent processing, the transmittable distance d1 and the method determination threshold d2 set in this processing are used unless the operation mode is changed. Then, the process proceeds to step ST14.
　ステップＳＴ１４では、距離検出部３５により撮像装置３から給電装置２までの距離Ｄが検出される。そして、処理がステップＳＴ１５に進む。 In step ST14, the distance D from the image pickup device 3 to the power supply device 2 is detected by the distance detection unit 35. Then, the process proceeds to step ST15.
　ステップＳＴ１５では、ステップＳＴ１３で設定された伝送可能距離ｄ１とステップＳＴ１５で検出された距離Ｄとが比較される。距離Ｄが伝送可能距離ｄ１より大きい（Ｄ＞ｄ１）場合には、処理がステップＳＴ１６に進む。 In step ST15, the transmittable distance d1 set in step ST13 and the distance D detected in step ST15 are compared. If the distance D is larger than the transmittable distance d1 (D> d1), the process proceeds to step ST16.
　ステップＳＴ１６では、距離Ｄが伝送可能距離ｄ１より大きい、すなわち、電力受電部３Ａが必要とする電力を給電装置２が供給できないことから、電池制御部３１Ａは、ワイヤレス給電を行わず、電池３４を充電しない制御を行う。また、電池制御部３１Ａは、電池３４からの電力を電力受電部３Ａに供給する制御を行う。そして、処理がステップＳＴ１１に戻る。 In step ST16, since the distance D is larger than the transmittable distance d1, that is, the power supply device 2 cannot supply the power required by the power receiving unit 3A, the battery control unit 31A does not perform wireless power supply and uses the battery 34. Control not to charge. Further, the battery control unit 31A controls to supply the power from the battery 34 to the power receiving unit 3A. Then, the process returns to step ST11.
　ステップＳＴ１５において、距離Ｄが伝送可能距離ｄ１以下である場合には、処理がステップＳＴ１７に進む。 If the distance D is equal to or less than the transmittable distance d1 in step ST15, the process proceeds to step ST17.
　ステップＳＴ１７では、距離Ｄが、伝送可能距離ｄ１以下であり方式決定用閾値ｄ２より大きい（ｄ２＜Ｄ≦ｄ１）か否かが判断される、判断結果がＹｅｓである場合には、処理がステップＳＴ１８に進む。 In step ST17, it is determined whether or not the distance D is equal to or less than the transmittable distance d1 and larger than the method determination threshold d2 (d2 <D≤d1). If the determination result is Yes, the process is stepped. Proceed to ST18.
　ステップＳＴ１８では、電池制御部３１Ａが、電力受電部３Ａに電力を供給する方式として給電方式を決定し、給電方式に対応する制御を行う。そして、処理がステップＳＴ１１に戻る。 In step ST18, the battery control unit 31A determines the power supply method as the method of supplying power to the power receiving unit 3A, and performs control corresponding to the power supply method. Then, the process returns to step ST11.
　ステップＳＴ１７における判断結果がＮｏであれば、処理がステップＳＴ１９に進む。ステップＳＴ１９では、残容量検出部３６により検出された電池３４の残容量が閾値Ｘ％より大きいか否かが判断される。電池３４の残容量が閾値Ｘ％より大きい場合には、処理がステップＳＴ１８に進む。ステップＳＴ１８の処理内容は上述してあるため省略する。ステップＳＴ１９の判断結果が、電池３４の残容量が閾値Ｘ％以下である場合には、処理がステップＳＴ２０に進む。 If the determination result in step ST17 is No, the process proceeds to step ST19. In step ST19, it is determined whether or not the remaining capacity of the battery 34 detected by the remaining capacity detecting unit 36 is larger than the threshold value X%. If the remaining capacity of the battery 34 is larger than the threshold value X%, the process proceeds to step ST18. Since the processing contents of step ST18 are described above, they will be omitted. If the determination result in step ST19 is that the remaining capacity of the battery 34 is equal to or less than the threshold value X%, the process proceeds to step ST20.
　ステップＳＴ２０では、電池制御部３１Ａが、電力受電部３Ａに電力を供給する方式として充電給電方式を決定し、充電給電方式に対応する制御を行う。そして、処理がステップＳＴ１１に戻る。 In step ST20, the battery control unit 31A determines the charge power supply method as the method of supplying power to the power receiving unit 3A, and performs control corresponding to the charge power supply method. Then, the process returns to step ST11.
　以上説明した本実施形態によれば、撮像装置３の設定に応じた伝送可能距離ｄ１および方式決定用閾値ｄ２を適切に設定することができる。従って、消費電力が大きい撮像装置３の動作モードが設定された場合でも伝送可能距離ｄ１等が適切に設定されるので、電力受電部３Ａの動作電力が足りなくなってしまい撮像装置３の動作が停止してしまうことを防止することができる。また、第１の実施形態と同様の効果を得ることができる。 According to the present embodiment described above, the transmittable distance d1 and the method determination threshold value d2 can be appropriately set according to the settings of the image pickup apparatus 3. Therefore, even when the operation mode of the image pickup apparatus 3 having a large power consumption is set, the transmittable distance d1 and the like are appropriately set, so that the operating power of the power receiving unit 3A becomes insufficient and the operation of the image pickup apparatus 3 is stopped. It is possible to prevent this from happening. Moreover, the same effect as that of the first embodiment can be obtained.
［第２の実施形態の変形例］
　なお、消費電力は、撮像装置３の動作モードにおける設定によっても異なるので、撮像装置３の動作モードにおける設定によって伝送可能距離ｄ１および方式決定用閾値ｄ２が設定されてもよい。連写モードの設定としては、例えば、１秒あたりの連写枚数が上げられる。連写枚数が大きいほど消費電力が大きくなる。動画モードの設定としては、動画像の画質（解像度）が挙げられる。動画像の画質が高くなるほど消費電力が大きくなる。静止画モードの設定としては、ライブビューの画質が挙げられる。ライブビューの画質が高いほど消費電力が大きくなる。 [Modified example of the second embodiment]
Since the power consumption differs depending on the setting in the operation mode of the image pickup apparatus 3, the transmittable distance d1 and the method determination threshold value d2 may be set depending on the setting in the operation mode of the image pickup apparatus 3. As the setting of the continuous shooting mode, for example, the number of continuous shootings per second can be increased. The larger the number of continuous shots, the higher the power consumption. The setting of the moving image mode includes the image quality (resolution) of the moving image. The higher the image quality of the moving image, the higher the power consumption. The setting of the still image mode includes the image quality of the live view. The higher the image quality of the live view, the higher the power consumption.
　図１０に示すように、各動作モードにおける設定に応じて伝送可能距離ｄ１および方式決定用閾値ｄ２が設定されてもよい。なお、図１０では、連写モードとして２０ｆｐｓ（frames per second）、１０ｆｐｓ、５ｆｐｓが例示されている。また、動画モードとして４ｋ３０ｐ(progressive)、ＦＨＤ(Full High Definition)１２０ｐ、ＦＨＤ６０ｐが例示されている。静止画モードの設定として、高画質、標準画質が例示されている。 As shown in FIG. 10, the transmittable distance d1 and the method determination threshold value d2 may be set according to the settings in each operation mode. In FIG. 10, 20 fps (frames per second), 10 fps, and 5 fps are exemplified as the continuous shooting mode. Further, as the moving image mode, 4k30p (progressive), FHD (Full High Definition) 120p, and FHD60p are exemplified. High image quality and standard image quality are exemplified as the setting of the still image mode.
＜変形例＞
　以上、本開示の複数の実施形態について具体的に説明したが、本開示の内容は上述した実施形態に限定されるものではなく、本開示の技術的思想に基づく各種の変形が可能である。 <Modification example>
Although the plurality of embodiments of the present disclosure have been specifically described above, the contents of the present disclosure are not limited to the above-described embodiments, and various modifications based on the technical idea of the present disclosure are possible.
　上述した実施形態において、撮像装置３が、複数の電池を有していてもよい。例えば、図１１Ａおよび図１１Ｂに示すように、撮像装置３が電池３４Ａおよび電池３４Ｂを有していてもよい。そして、電池制御部３１Ａは、電池からの電力を電力受電部３Ａに供給する充電給電方式の場合において、所定の電池を充電しつつ、他の電池から電力受電部３Ａに対して電力を供給する制御を行うようにしてもよい。例えば、図１１Ａに示すように、残容量が大きい電池３４Ａから電力受電部３Ａに電力の供給を行い、残容量が小さい電池３４Ｂに対して給電装置２から伝送される電力を用いた充電が行われる。そして、電池３４Ａの残容量が電池３４Ｂの残容量より小さくなった場合には、図１１Ｂに示すように、充電対象の電池と電力受電部３Ａに電力を供給する電池とを切り替える。電力供給を行う電池と充電が行われる電池とが別々の電池となるので、電池の劣化を防止することができる。なお、撮像装置３が３個以上の電池を有していてもよい。 In the above-described embodiment, the image pickup device 3 may have a plurality of batteries. For example, as shown in FIGS. 11A and 11B, the image pickup apparatus 3 may have a battery 34A and a battery 34B. Then, in the case of the charge power supply system in which the power from the battery is supplied to the power receiving unit 3A, the battery control unit 31A supplies power from another battery to the power receiving unit 3A while charging the predetermined battery. Control may be performed. For example, as shown in FIG. 11A, power is supplied from the battery 34A having a large remaining capacity to the power receiving unit 3A, and the battery 34B having a small remaining capacity is charged using the power transmitted from the power feeding device 2. Will be. Then, when the remaining capacity of the battery 34A becomes smaller than the remaining capacity of the battery 34B, as shown in FIG. 11B, the battery to be charged and the battery that supplies power to the power receiving unit 3A are switched. Since the battery that supplies power and the battery that is charged are separate batteries, deterioration of the battery can be prevented. The image pickup device 3 may have three or more batteries.
　上述した実施形態において、電池制御部３１Ａは、給電装置２から送信される電力の効率が所定以下の場合に、電力受電部３Ａに対して電池３４のみから電力が供給されるように制御してもよい。例えば、図１２に示すように、給電装置２が、自身が送信した電力を示す送信電力情報を通信部２３により演算装置４に送信する。また、撮像装置３は、自身が受信した電力を示す受信電力情報を通信部２３により演算装置４に送信する。演算装置４は、電力効率演算部４１を有している。電力効率演算部４１は、（受信電力情報／送信電力情報）により電力効率を演算する。そして、演算された電力効率を示す電力効率情報が撮像装置３の電池制御部３１Ａに送信される。図１３に示すように、電力効率が所定以下となる場合には、給電装置２からの電力伝送がオフされる。電池制御部３１Ａは、電力受電部３Ａに対して電池３４のみから電力が供給されるように制御する。演算装置４の機能は、給電装置２が有していてもよいし、撮像装置３が有していてもよいし、他の装置が有していてもよい。 In the above-described embodiment, the battery control unit 31A controls the power receiving unit 3A so that power is supplied only from the battery 34 to the power receiving unit 3A when the efficiency of the power transmitted from the power feeding device 2 is equal to or less than a predetermined value. May be good. For example, as shown in FIG. 12, the power supply device 2 transmits the transmission power information indicating the power transmitted by itself to the arithmetic unit 4 by the communication unit 23. Further, the image pickup apparatus 3 transmits the received power information indicating the electric power received by itself to the arithmetic unit 4 by the communication unit 23. The arithmetic unit 4 has a power efficiency arithmetic unit 41. The power efficiency calculation unit 41 calculates the power efficiency based on (received power information / transmitted power information). Then, the power efficiency information indicating the calculated power efficiency is transmitted to the battery control unit 31A of the image pickup apparatus 3. As shown in FIG. 13, when the power efficiency becomes a predetermined value or less, the power transmission from the power feeding device 2 is turned off. The battery control unit 31A controls the power receiving unit 3A so that power is supplied only from the battery 34. The function of the arithmetic unit 4 may be possessed by the power feeding device 2, the image pickup device 3, or another device.
　上述した実施形態において、撮像装置３が距離検出部３５を有さずに、撮像装置３の使用状態から距離Ｄが推定されてもよい。例えば、給電装置２がユーザの身体に装着される場合に、大凡の装着位置が決まることから、当該装着位置と撮像装置３の使用状態に応じた位置との距離を予め計測しておくことで、撮像装置３の使用状態から距離Ｄを推定することができる。 In the above-described embodiment, the distance D may be estimated from the usage state of the image pickup device 3 without the image pickup device 3 having the distance detection unit 35. For example, when the power feeding device 2 is mounted on the user's body, the mounting position is roughly determined. Therefore, the distance between the mounting position and the position according to the usage state of the image pickup device 3 can be measured in advance. , The distance D can be estimated from the usage state of the image pickup apparatus 3.
　例えば、給電装置２が首からぶら下げる形で装着される。この場合、給電装置２の位置は、胸元付近に位置する。撮像装置３の使用状態は、センサや表示部の位置等に応じて判別することができる。例えば、瞳センサによる検出結果に基づいてユーザが撮像装置３のファインダーを覗きながら使用していると判別することができる。係る使用状態での撮像装置３の位置と給電装置２のおおよその位置との間の距離を予め測定して登録しておけば、距離検出部３５がなくても、撮像装置３の使用状態がファインダーを覗きながら使用している場合の距離Ｄを推定することができる。また、撮像装置３の表示部の向きが撮影方向と同じ向きに設定されている場合には、撮像装置３の使用状態が自撮り（手を伸ばして自分を撮影する）であると判別することも可能である。係る使用状態での撮像装置３の位置と給電装置２の大凡の位置との間の距離を予め測定して登録しておけば、距離検出部３５がなくても、撮像装置３の使用状態が自撮りの場合の距離Ｄを推定することができる。 For example, the power supply device 2 is attached so as to hang from the neck. In this case, the position of the power feeding device 2 is located near the chest. The usage state of the image pickup apparatus 3 can be determined according to the position of the sensor, the display unit, and the like. For example, based on the detection result of the pupil sensor, it can be determined that the user is using while looking into the finder of the image pickup apparatus 3. If the distance between the position of the image pickup device 3 and the approximate position of the power supply device 2 in the usage state is measured and registered in advance, the usage state of the image pickup device 3 can be changed even without the distance detection unit 35. The distance D can be estimated when the device is used while looking through the finder. Further, when the orientation of the display unit of the image pickup device 3 is set to be the same as the shooting direction, it is determined that the usage state of the image pickup device 3 is self-shooting (reaching a hand to shoot oneself). Is also possible. If the distance between the position of the image pickup device 3 and the approximate position of the power supply device 2 in such a usage state is measured and registered in advance, the usage state of the image pickup device 3 can be obtained even without the distance detection unit 35. The distance D in the case of self-shooting can be estimated.
　方式決定用閾値は、電力供給を行う方式が頻繁に切り替わることを防止するためにマージンをもたせた複数の閾値であってもよい。 The method determination threshold value may be a plurality of threshold values having a margin in order to prevent frequent switching of the power supply method.
　上述した実施形態に係る撮像装置は、撮像機能が組み込まれたスマートフォン等の電子機器であってもよい。 The image pickup device according to the above-described embodiment may be an electronic device such as a smartphone having a built-in image pickup function.
　上述の実施形態および変形例において挙げた構成、方法、工程、形状、材料および数値などはあくまでも例に過ぎず、必要に応じてこれと異なる構成、方法、工程、形状、材料および数値などを用いてもよく、公知のもので置き換えることも可能である。また、実施形態および変形例における構成、方法、工程、形状、材料および数値などは、技術的な矛盾が生じない範囲において、互いに組み合わせることが可能である。 The configurations, methods, processes, shapes, materials, numerical values, etc. given in the above-described embodiments and modifications are merely examples, and different configurations, methods, processes, shapes, materials, numerical values, etc. may be used as necessary. It may be replaced with a known one. In addition, the configurations, methods, processes, shapes, materials, numerical values, and the like in the embodiments and modifications can be combined with each other as long as there is no technical contradiction.
　なお、本明細書中で例示された効果により本開示の内容が限定して解釈されるものではない。 It should be noted that the contents of the present disclosure are not limitedly interpreted due to the effects exemplified in the present specification.
　本開示は、以下の構成も採ることができる。
（１）
　無線通信により給電装置から受電する撮像装置であって、
　前記撮像装置は、充電給電制御部を含み、前記充電給電制御部は前記撮像装置と前記給電装置との距離に応じて受電方式を決定する
　撮像装置。
（２）
　前記充電給電制御部は、さらに電池の残容量に応じて、前記受電方式を決定する
　（１）に記載の撮像装置。
（３）
　前記受電方式は、給電方式および充電給電方式を含む
　（１）または（２）に記載の撮像装置。
（４）
　前記給電方式は、前記給電装置から供給された電力を、前記電池を介さずに前記電力受電部に供給する受電方式である
　（３）に記載の撮像装置。
（５）
　前記充電給電方式は、前記給電装置から供給された電力により前記電池を充電しつつ、前記電池からの電力を前記電力受電部に供給する方式、または、前記給電装置から供給された電力により前記電池を充電しつつ、前記給電装置からの電力を前記電力受電部に供給する受電方式である
　（３）または（４）に記載の撮像装置。
（６）
　前記充電給電制御部は、
　前記給電装置までの距離が、前記電力受電部が動作可能な電力を伝送可能な伝送可能距離であり、且つ、方式決定用閾値より大きい場合には、前記受電方式として前記給電方式を決定する
　（３）から（５）までの何れかに記載の撮像装置。
（７）
　前記充電給電制御部は、
　前記給電装置までの距離が、前記電力受電部が動作可能な電力を伝送可能な伝送可能距離であり、且つ、方式決定用閾値より小さく前記電池の残容量が所定より少ない場合には、前記受電方式として前記充電給電方式を決定する
　（３）から（６）までの何れかに記載の撮像装置。
（８）
　前記充電給電制御部は、
　前記給電装置までの距離が、前記電力受電部が動作可能な電力を伝送可能な伝送可能距離であり、且つ、方式決定用閾値より小さく前記電池の残容量が所定より大きい場合には、前記受電方式として前記給電方式を決定する
　（３から（７）までの何れかに記載の撮像装置。
（９）
　前記伝送可能距離および前記方式決定用閾値は、前記撮像装置の動作モードに応じた値である
　（６）から（８）までの何れかに記載の撮像装置。
（１０）
　前記動作モードの消費電力が大きいほど前記伝送可能距離および前記方式決定用閾値が小さくなり、前記動作モードの消費電力が小さいほど前記伝送可能距離および前記方式決定用閾値が大きくなる
　（９）に記載の撮像装置。
（１１）
　前記動作モードは、消費電力が大きい順に、連写モード、動画モードおよび静止画モードである
　（１０）に記載の撮像装置。
（１２）
　前記連写モードにおける連写枚数が大きいほど消費電力が大きくなる
　（１０）または（１１）に記載の撮像装置。
（１３）
　前記動画モードにおける画質が高いほど消費電力が大きくなる
　（１０）から（１２）までの何れかに記載の撮像装置。
（１４）
　前記静止画モードにおける画質が高いほど消費電力が大きくなる
　（１０）から（１３）までの何れかに記載の撮像装置。
（１５）
　前記給電装置までの距離を検出する距離検出部を有する
　（１）から（１４）までの何れかに記載の撮像装置。
（１６）
　前記撮像装置の使用状態から前記距離が推定される
　（１）から（１４）までの何れかに記載の撮像装置。
（１７）
　複数の前記電池を有し、
　前記充電給電制御部は、前記電池からの電力を前記電力受電部に供給する充電給電方式の場合において、所定の電池を充電しつつ、他の電池から前記電力受電部に対して電力を供給する制御を行う
　（１）から（１６）までの何れかに記載の撮像装置。
（１８）
　前記充放電制御部は、前記給電装置から送信される電力の効率が所定以下の場合に、前記電力受電部に対して前記電池から電力が供給されるように制御する
　（１）から（１７）までの何れかに記載の撮像装置。
（１９）
　無線通信により給電装置から受電する撮像装置の制御方法であって、
　前記撮像装置が有する充電給電制御部が、前記撮像装置と前記給電装置との距離に応じて受電方式を決定する
　制御方法。
（２０）
　無線通信により給電装置から受電する撮像装置の制御方法をコンピュータに実行させるプログラムであって、
　前記撮像装置が有する充電給電制御部が、前記撮像装置と前記給電装置との距離に応じて受電方式を決定する
　プログラム。 The present disclosure may also adopt the following configuration.
(1)
An image pickup device that receives power from a power supply device via wireless communication.
The image pickup device includes a charge power supply control unit, and the charge power supply control unit determines a power receiving method according to a distance between the image pickup device and the power supply device.
(2)
The image pickup device according to (1), wherein the charge power supply control unit further determines the power receiving method according to the remaining capacity of the battery.
(3)
The image pickup apparatus according to (1) or (2), wherein the power receiving method includes a power feeding method and a charging power feeding method.
(4)
The imaging device according to (3), wherein the power feeding method is a power receiving method in which the power supplied from the power feeding device is supplied to the power receiving unit without going through the battery.
(5)
The charge power supply method is a method of supplying the power from the battery to the power receiving unit while charging the battery with the power supplied from the power supply device, or the battery using the power supplied from the power supply device. The image pickup device according to (3) or (4), which is a power receiving method for supplying power from the power receiving device to the power receiving unit while charging the power receiving device.
(6)
The charge power supply control unit is
When the distance to the power supply device is the transmittable distance at which the power receiving unit can transmit the operable power and is larger than the method determination threshold value, the power supply method is determined as the power receiving method (the power receiving method is determined). The image pickup apparatus according to any one of 3) to (5).
(7)
The charge power supply control unit is
When the distance to the power feeding device is a transmittable distance capable of transmitting the power that the power receiving unit can operate, and the distance is smaller than the threshold for determining the method and the remaining capacity of the battery is smaller than the predetermined value, the power receiving device is received. The imaging device according to any one of (3) to (6), which determines the charging power supply method as the method.
(8)
The charge power supply control unit is
When the distance to the power feeding device is a transmittable distance capable of transmitting the power that the power receiving unit can operate, and the distance is smaller than the threshold for determining the method and the remaining capacity of the battery is larger than a predetermined value, the power receiving device is received. The image pickup apparatus according to any one of 3 to (7), wherein the power feeding method is determined as the method.
(9)
The image pickup apparatus according to any one of (6) to (8), wherein the transmittable distance and the method determination threshold value are values according to the operation mode of the image pickup apparatus.
(10)
The larger the power consumption of the operation mode, the smaller the transmittable distance and the threshold for determining the method, and the smaller the power consumption of the operation mode, the larger the transmittable distance and the threshold for determining the method (9). Imaging device.
(11)
The imaging device according to (10), wherein the operation modes are a continuous shooting mode, a moving image mode, and a still image mode in descending order of power consumption.
(12)
The image pickup apparatus according to (10) or (11), wherein the power consumption increases as the number of continuous shots in the continuous shooting mode increases.
(13)
The image pickup apparatus according to any one of (10) to (12), wherein the higher the image quality in the moving image mode, the larger the power consumption.
(14)
The image pickup apparatus according to any one of (10) to (13), wherein the higher the image quality in the still image mode, the larger the power consumption.
(15)
The imaging device according to any one of (1) to (14), which has a distance detecting unit for detecting the distance to the power feeding device.
(16)
The imaging device according to any one of (1) to (14), wherein the distance is estimated from the usage state of the imaging device.
(17)
It has multiple batteries and
In the case of a charge / power supply system in which the power from the battery is supplied to the power receiving unit, the charge / power supply control unit supplies power from another battery to the power receiving unit while charging a predetermined battery. The image pickup apparatus according to any one of (1) to (16) for controlling.
(18)
The charge / discharge control unit controls the power receiving unit to be supplied with power from the battery when the efficiency of the power transmitted from the power feeding device is equal to or less than a predetermined value (1) to (17). The image pickup device described in any of the above.
(19)
It is a control method of an image pickup device that receives power from a power supply device by wireless communication.
A control method in which a charging power supply control unit included in the image pickup device determines a power receiving method according to a distance between the image pickup device and the power supply device.
(20)
It is a program that causes a computer to execute a control method for an image pickup device that receives power from a power supply device via wireless communication.
A program in which the charge power supply control unit of the image pickup device determines a power receiving method according to the distance between the image pickup device and the power supply device.
２・・・給電装置
３・・・撮像装置
３Ａ・・・電力受電部
３１・・・制御部
３１Ａ・・・電池制御部
３４・・・電池
３５・・・距離検出部 2 ... Power supply device 3 ... Image pickup device 3A ... Power receiving unit 31 ... Control unit 31A ... Battery control unit 34 ... Battery 35 ... Distance detection unit

Claims (20)

  1. 　無線通信により給電装置から受電する撮像装置であって、
    　前記撮像装置は、充電給電制御部を含み、前記充電給電制御部は前記撮像装置と前記給電装置との距離に応じて受電方式を決定する
    　撮像装置。     An image pickup device that receives power from a power supply device via wireless communication.
    The image pickup device includes a charge power supply control unit, and the charge power supply control unit determines a power receiving method according to a distance between the image pickup device and the power supply device.
  2. 　前記充電給電制御部は、さらに電池の残容量に応じて、前記受電方式を決定する
    　請求項１に記載の撮像装置。     The image pickup device according to claim 1, wherein the charge power supply control unit further determines the power receiving method according to the remaining capacity of the battery.
  3. 　前記受電方式は、給電方式および充電給電方式を含む
    　請求項１に記載の撮像装置。     The image pickup apparatus according to claim 1, wherein the power receiving method includes a power feeding method and a charging power feeding method.
  4. 　前記給電方式は、前記給電装置から供給された電力を、電池を介さずに電力受電部に供給する受電方式である
    　請求項３に記載の撮像装置。     The image pickup device according to claim 3, wherein the power feeding method is a power receiving method in which the power supplied from the power feeding device is supplied to the power receiving unit without going through a battery.
  5. 　前記充電給電方式は、前記給電装置から供給された電力により電池を充電しつつ、前記電池からの電力を電力受電部に供給する方式、または、前記給電装置から供給された電力により前記電池を充電しつつ、前記給電装置からの電力を電力受電部に供給する受電方式である
    　請求項３に記載の撮像装置。     The charge power supply method is a method of supplying power from the battery to a power receiving unit while charging the battery with the power supplied from the power supply device, or charging the battery with the power supplied from the power supply device. The image pickup device according to claim 3, which is a power receiving method for supplying electric power from the power feeding device to a power receiving unit.
  6. 　前記充電給電制御部は、
    　前記給電装置までの距離が、電力受電部が動作可能な電力を伝送可能な伝送可能距離であり、且つ、方式決定用閾値より大きい場合には、前記受電方式として前記給電方式を決定する
    　請求項３に記載の撮像装置。     The charge power supply control unit is
    A claim that determines the power supply method as the power reception method when the distance to the power supply device is a transmittable distance capable of transmitting the power that can be operated by the power receiving unit and is larger than the method determination threshold value. 3. The imaging device according to 3.
  7. 　前記充電給電制御部は、
    　前記給電装置までの距離が、電力受電部が動作可能な電力を伝送可能な伝送可能距離であり、且つ、方式決定用閾値より小さく前記電池の残容量が所定より少ない場合には、前記受電方式として前記充電給電方式を決定する
    　請求項３に記載の撮像装置。     The charge power supply control unit is
    When the distance to the power feeding device is a transmittable distance capable of transmitting the power that can be operated by the power receiving unit, and is smaller than the method determination threshold value and the remaining capacity of the battery is smaller than a predetermined value, the power receiving method is used. The image pickup device according to claim 3, wherein the charging power supply method is determined.
  8. 　前記充電給電制御部は、
    　前記給電装置までの距離が、電力受電部が動作可能な電力を伝送可能な伝送可能距離であり、且つ、方式決定用閾値より小さく前記電池の残容量が所定より大きい場合には、前記受電方式として前記給電方式を決定する
    　請求項３に記載の撮像装置。     The charge power supply control unit is
    When the distance to the power feeding device is a transmittable distance capable of transmitting the power that the power receiving unit can operate and the remaining capacity of the battery is smaller than the threshold for determining the method and larger than a predetermined value, the power receiving method is used. The image pickup apparatus according to claim 3, wherein the power feeding method is determined.
  9. 　前記伝送可能距離および前記方式決定用閾値は、前記撮像装置の動作モードに応じた値である
    　請求項６に記載の撮像装置。     The image pickup apparatus according to claim 6, wherein the transmittable distance and the method determination threshold value are values according to the operation mode of the image pickup apparatus.
  10. 　前記動作モードの消費電力が大きいほど前記伝送可能距離および前記方式決定用閾値が小さくなり、前記動作モードの消費電力が小さいほど前記伝送可能距離および前記方式決定用閾値が大きくなる
    　請求項９に記載の撮像装置。     The ninth aspect of claim 9 is that the larger the power consumption of the operation mode, the smaller the transmittable distance and the threshold for determining the method, and the smaller the power consumption of the operation mode, the larger the transmittable distance and the threshold for determining the method. Imaging device.
  11. 　前記動作モードは、消費電力が大きい順に、連写モード、動画モードおよび静止画モードである
    　請求項１０に記載の撮像装置。     The imaging device according to claim 10, wherein the operation modes are a continuous shooting mode, a moving image mode, and a still image mode in descending order of power consumption.
  12. 　前記連写モードにおける連写枚数が大きいほど消費電力が大きくなる
    　請求項１０に記載の撮像装置。     The image pickup apparatus according to claim 10, wherein the power consumption increases as the number of continuous shots in the continuous shooting mode increases.
  13. 　前記動画モードにおける画質が高いほど消費電力が大きくなる
    　請求項１０に記載の撮像装置。     The image pickup apparatus according to claim 10, wherein the higher the image quality in the moving image mode, the higher the power consumption.
  14. 　前記静止画モードにおける画質が高いほど消費電力が大きくなる
    　請求項１０に記載の撮像装置。     The image pickup apparatus according to claim 10, wherein the higher the image quality in the still image mode, the larger the power consumption.
  15. 　前記給電装置までの距離を検出する距離検出部を有する
    　請求項１に記載の撮像装置。     The imaging device according to claim 1, further comprising a distance detecting unit that detects the distance to the power feeding device.
  16. 　前記撮像装置の使用状態から前記距離が推定される
    　請求項１に記載の撮像装置。     The imaging device according to claim 1, wherein the distance is estimated from the usage state of the imaging device.
  17. 　複数の前記電池を有し、
    　前記充電給電制御部は、前記電池からの電力を前記電力受電部に供給する充電給電方式の場合において、所定の電池を充電しつつ、他の電池から前記電力受電部に対して電力を供給する制御を行う
    　請求項１に記載の撮像装置。     It has multiple batteries and
    In the case of a charge / power supply system in which the power from the battery is supplied to the power receiving unit, the charge / power supply control unit supplies power from another battery to the power receiving unit while charging a predetermined battery. The image pickup apparatus according to claim 1, wherein the image pickup device is controlled.
  18. 　前記充放電制御部は、前記給電装置から送信される電力の効率が所定以下の場合に、電力受電部に対して前記電池から電力が供給されるように制御する
    　請求項１に記載の撮像装置。     The image pickup device according to claim 1, wherein the charge / discharge control unit controls the power receiving unit to be supplied with power from the battery when the efficiency of the power transmitted from the power supply device is equal to or less than a predetermined value. ..
  19. 　無線通信により給電装置から受電する撮像装置の制御方法であって、
    　前記撮像装置が有する充電給電制御部が、前記撮像装置と前記給電装置との距離に応じて受電方式を決定する
    　制御方法。     It is a control method of an image pickup device that receives power from a power supply device by wireless communication.
    A control method in which a charging power supply control unit included in the image pickup device determines a power receiving method according to a distance between the image pickup device and the power supply device.
  20. 　無線通信により給電装置から受電する撮像装置の制御方法をコンピュータに実行させるプログラムであって、
    　前記撮像装置が有する充電給電制御部が、前記撮像装置と前記給電装置との距離に応じて受電方式を決定する
    　プログラム。     It is a program that causes a computer to execute a control method for an image pickup device that receives power from a power supply device via wireless communication.
    A program in which the charge power supply control unit of the image pickup device determines a power receiving method according to the distance between the image pickup device and the power supply device.
PCT/JP2021/016052 2020-05-15 2021-04-20 Imaging device, control method, and program WO2021230020A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000209790A (en) * 1999-01-12 2000-07-28 Matsushita Electric Ind Co Ltd Moving body discriminating device
JP2011125211A (en) * 2009-12-11 2011-06-23 Korea Electronics Telecommun Portable device and battery charging method thereof
JP2019110614A (en) * 2017-12-15 2019-07-04 キヤノン株式会社 Power reception apparatus and power supply apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000209790A (en) * 1999-01-12 2000-07-28 Matsushita Electric Ind Co Ltd Moving body discriminating device
JP2011125211A (en) * 2009-12-11 2011-06-23 Korea Electronics Telecommun Portable device and battery charging method thereof
JP2019110614A (en) * 2017-12-15 2019-07-04 キヤノン株式会社 Power reception apparatus and power supply apparatus

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