JP6062080B2 - Power receiving device, power receiving device control method, and program - Google Patents

Description

  The present invention relates to vibration control in a power receiving apparatus.

  In recent years, a wireless power feeding method that feeds power in a cableless manner has attracted attention. In an electromagnetic induction method that is one of wireless power supply methods, power is supplied by generating an induction current between a coil of a power supply device and a coil of a power reception device. In the magnetic resonance method, which is one of the wireless power feeding methods, power is supplied by causing an electrical resonance phenomenon between the coil of the power feeding device and the coil of the power receiving device. According to the magnetic resonance method, power can be supplied over a longer distance than the electromagnetic induction method.

  In the wireless power feeding method, the power feeding efficiency is lowered due to the positional relationship between the coils. In view of this, a method has been proposed in which a feeding coil is made movable or a plurality of feeding coils is used to widen a region where power feeding efficiency is good (hereinafter referred to as a feeding region) and to suppress a reduction in feeding efficiency. .

  Moreover, when a power receiving apparatus has a vibration part like a mobile phone, for example, a method for suppressing a decrease in power feeding efficiency by prohibiting vibration of the power receiving apparatus during power feeding has been proposed (Patent Document 1). .

JP 2001-197674 A

  However, there may be a case where it is not necessary to prohibit vibration of the power receiving device even when the power receiving device is receiving power. For example, there is a case where the power receiving device is receiving power via a cable, or even if the power receiving device vibrates widely and the power receiving device vibrates, the power receiving device does not deviate from the power transmitting region.

  If the vibration of the power receiving apparatus is prohibited up to such a case, the user cannot know the incoming call or a predetermined time by the vibration, for example, and the convenience for the user is lowered.

  In view of the above problems, an object is to selectively perform whether or not to vibrate the power receiving device during power reception according to the power reception status. Another object of the present invention is to notify a user that vibration of a power receiving device during power reception is prohibited.

  A power receiving device for achieving the above object is a power receiving device having a vibration section, and is a power receiving method selected from a plurality of power receiving methods including a power receiving method using electromagnetic induction and a power receiving method using magnetic resonance. Power receiving means for receiving power from a power transmission device, determination means for determining a power reception method used for power reception by the power reception means, and prohibition means for prohibiting vibration by the vibration unit according to a determination result by the determination means And having.

  ADVANTAGE OF THE INVENTION According to this invention, it can selectively perform according to a power receiving condition whether to prohibit the vibration of the power receiving apparatus during power reception. In addition, according to another aspect of the present invention, it is possible to notify the user that vibration of the power receiving device during power reception is prohibited.

Configuration diagram of wireless power supply system Block diagram showing functional configuration of wireless power supply system The figure which shows the operation | movement flow of the power receiving apparatus of a wireless power feeding system Configuration diagram of a wireless power feeding system in which a wireless power transmission device has a power transmission unit using an electromagnetic coupling method in one place Configuration diagram of a wireless power feeding system in which the wireless power transmission device has one power transmission unit using the electromagnetic coupling method and the power transmission unit can move Configuration diagram of a wireless power feeding system in which a wireless power transmission device has a plurality of power transmission units using an electromagnetic coupling method

[Example]
FIG. 1 is a configuration diagram of a wireless power feeding system according to the first embodiment.

  The wireless power feeding system includes a wireless power transmission device (for example, a charging stand) 101 that performs power transmission and a power reception device (for example, a camera or a mobile phone) 102 that performs power reception. The power transmission unit 208 of the wireless power transmission apparatus 101 forms a power transmission region 103 that can transmit power. When the wireless power receiving unit 209 of the power receiving apparatus 102 enters the power transmission area 103 of the wireless power transmitting apparatus 101, the wireless power receiving unit 209 receives power using electromagnetic induction. In addition, it may replace with electromagnetic induction and the system which supplies electric power by magnetic resonance may be sufficient.

  FIG. 2 shows a hardware configuration of the wireless power transmitting apparatus 101 and the power receiving apparatus 102. The wireless power transmission apparatus 101 includes a control unit 201, a power reception device detection unit 202, a storage unit 203, and a power transmission unit 208.

  A control unit (specifically, processor) 201 governs overall control of the wireless power transmission apparatus 101. The power receiving device detection unit 202 detects position information where the power receiving device 102 is placed. Specifically, the position of the wireless power receiving unit 209 of the power receiving apparatus 102 using at least one of the pressure sensor and the ultrasonic sensor included in the wireless power transmitting apparatus 101 or the time variation of the electromagnetic characteristics on the surface of the wireless power transmitting apparatus 101. Is determined. Instead of the position itself, information such as the distance from the power transmission unit 208 by calculating the distance between the power transmission unit 208 of the wireless power transmission device 101 and the wireless power reception unit 209 of the power reception device 102 may be used.

  The storage unit 203 stores configuration information of the power transmission unit 208. Here, the configuration information includes the maximum transmission power of the power transmission unit 208, information on the power transmission coil (whether the power transmission coil of the power transmission unit 208 is movable, or can be tracked if it is movable, and includes a plurality of power transmission coils. Information).

  The storage unit 203 includes a memory such as a ROM or a RAM. However, the present invention is not limited to this, and a storage medium such as a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, or DVD may be used. The power transmission unit 208 performs power transmission using electromagnetic induction.

  The power receiving apparatus 102 includes a control unit 204, a vibration unit 205, a wireless power transmission device detection unit 206, a wireless power reception unit 209, a power storage unit 207, a storage unit 210, a wired power reception unit 211, a speaker 212, and a prohibition unit 213.

  The control unit (specifically, processor) 204 controls the entire power receiving apparatus 102 and acquires the amount of power received by the wireless power receiving unit 209 and the amount of power stored in the power storage unit 207. The vibration unit 205 has a function of vibrating the whole or a part of the power receiving apparatus 102, and is used, for example, to notify a user of a predetermined time or incoming data.

  The power transmission device detection unit 206 detects the wireless power transmission device by detecting a notification signal (for example, a Ping signal) that is periodically notified by the wireless power transmission device. The power storage unit 207 stores the power received from the wireless power reception unit 209 and the wired power reception unit 211. The wireless power receiving unit 209 receives power from a wireless power transmitting apparatus charged with electromagnetic induction.

  The storage unit 210 stores a program for the control unit 201 to realize a flowchart described later. The storage unit 210 includes a memory such as a ROM or a RAM. However, the present invention is not limited to this, and a storage medium such as a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, or DVD may be used.

  The wired power receiving unit 211 includes a charging connector, receives power from a commercial power source via a wire, and stores the power in the power storage unit 207. Note that power may be received by USB bus power instead of the commercial power source. The speaker 212 outputs sound while playing music. The prohibition unit 213 prohibits vibration of the vibration unit 205. Reference numeral 214 denotes a display unit for performing various notifications to the user.

  FIG. 3 is a diagram illustrating an operation flow of the power receiving apparatus 102 of the wireless power feeding system according to the present embodiment. The flow is realized by the control unit 204 of the power receiving apparatus 102 reading a program stored in the storage unit 210.

  In step S301, the wireless power transmission device detection unit 206 detects a wireless power transmission device (here, the wireless power transmission device 101). The detection is performed by receiving a notification signal (ping) transmitted from the wireless power transmitting apparatus 101.

  If the wireless power transmission device cannot be detected, the wired power receiving unit 211 determines whether or not the charging connector is wired (S302). If the wired connection is established, the process proceeds to S308. If the wired connection is not established, the process returns to S301.

  On the other hand, when the wireless power transmission device is detected, the wireless power transmission device detection unit 206 determines the wireless power transmission method of the detected wireless power transmission device based on the notification from the detected wireless power transmission device (S303). If the wireless power transmission method is electromagnetic induction, the process proceeds to S304. If not (for example, magnetic resonance), the process proceeds to S308.

  In step S <b> 304, the control unit 204 acquires control information from the wireless power transmission apparatus 101. The control information is position information of the wireless power reception unit 209 and configuration information of the power transmission unit 208. Here, it is assumed that the power receiving apparatus 102 requests control information from the wireless power transmitting apparatus 101, and the control information is transmitted in response to the request. However, the present invention is not limited to this, and the wireless power transmitting apparatus 101 may transmit in response to the detection of the power receiving apparatus 102.

  In step S <b> 305, the control unit 202 determines whether the power receiving apparatus 102 is playing music. If music is not being played, the process proceeds to S307. On the other hand, when playing music, whether the sound is output using the speaker 212 or whether the sound is output using another speaker different from the speaker 212 in the stereo system, for example, via a wire. The control unit 202 determines (S306).

  If the sound is output using the speaker 212, the process proceeds to S312 and the prohibition unit 213 prohibits the vibration of the vibration unit 205. Thereby, in addition to the vibration caused by the sound output from the speaker 212, the vibration unit 205 vibrates, so that the positional relationship between the wireless power transmitting apparatus 101 and the power receiving apparatus 102 is greatly changed, and the reduction in power supply efficiency is suppressed. can do. In addition, it is possible to prevent noise from being generated due to vibration of the power receiving apparatus 202 during music playback.

  On the other hand, when sound is output using another speaker different from the speaker 212, the process proceeds to S307, and the control unit 204 has the center of the wireless power receiving unit 209 near the center of the power transmission area (center area). Whether or not to do so is determined based on the control information (S305). Specifically, it is determined whether or not the wireless power receiving unit 209 exists near the center (shaded portion) shown in FIG.

  That is, when the wireless power transmitting apparatus 101 has a single fixed coil (this information is included in the configuration information), it is determined whether or not the wireless power receiving unit 209 exists in the shaded portion in FIG. The position information is used for determination.

  Further, when the wireless power transmitting apparatus 101 has a plurality of fixed coils (this information is included in the configuration information), it is determined whether or not the wireless power receiving unit 209 exists in the hatched portion in FIG. The position information is used for determination.

  Further, when the wireless power transmitting apparatus 101 has a single moving coil (this information is included in the configuration information), whether or not the wireless power receiving unit 209 exists in the hatched portion in FIG. Is determined using the position information. The moving coil is a coil that moves according to the position of the wireless power receiving unit 209. In this case, the power transmission area of the moving coil is determined according to the moving range of the coil. In the case of the moving coil, the vicinity of the center is the vicinity of the center of the power transmission area determined according to the moving range of the coil.

  If it exists in the central area, the process proceeds to S308, and if it does not exist, the process proceeds to S312.

  In step S <b> 308, the control unit 204 permits the vibration unit 205 to vibrate. Accordingly, the vibration unit 205 vibrates when notifying the user of a predetermined time or incoming data. When charging by wire or when the center of the wireless power receiving unit 209 exists near the center of the power transmission area, the position of the wireless power receiving unit 209 changes due to the vibration of the power receiving device 102, thereby improving the power feeding efficiency. The possibility of a significant drop is low. In such a case, since it vibrates when notifying the user of a predetermined time or incoming data, convenience for the user is improved.

  Thereafter, the power storage unit 207 is charged (S309). During charging, it is determined whether the power supply efficiency is equal to or higher than a predetermined value (S310). Here, in the case of wired connection, it is determined that the power supply efficiency is greater than or equal to a predetermined value. Further, when receiving power wirelessly, the amount of power transmission is acquired from the wireless power transmitting apparatus 101, and the power transmission efficiency is calculated by comparing the acquired amount of transmitted power with the amount of power actually received by the wireless power receiving unit 209. . If the power supply efficiency is greater than or equal to a predetermined value, the process proceeds to S309, and if it is less than the predetermined value, the process proceeds to S310. Here, when the power supply efficiency is less than a predetermined value, the wireless power transmission apparatus 101 may be requested to increase the amount of power transmission. Thereby, even if it is a case where electric power feeding efficiency is low, the amount of received electric power can be increased and charging time can be shortened.

  In general, since the electromagnetic induction method has higher power supply efficiency than the magnetic resonance method, the predetermined value is different depending on the power transmission method. For example, if the power transmission method is an electromagnetic induction method, it is 50%, and if it is a magnetic resonance method, it is 30%.

  In step S311, the control unit 204 determines whether or not the power storage unit 207 is fully charged. If the battery is fully charged, the charging is terminated. If the battery is not fully charged, the process returns to S309 and the charging is continued.

  Next, S312 will be described. In S <b> 312, the prohibition unit 213 prohibits the vibration of the vibration unit 205. Depending on the configuration of the power receiving apparatus 102, this may be achieved by canceling the vibration mode. Therefore, the position of the wireless power receiving unit 209 is not changed by the vibration of the power receiving apparatus 102, and thus the possibility that the power supply efficiency is greatly reduced can be reduced. When vibration is prohibited and an event to be notified to the user due to vibration by the vibration unit 205 such as an incoming call or an alarm occurs, it is output from the speaker 212 instead of the vibration by the vibration unit 205. Or light or characters displayed on the display unit 214 is used. Thereby, even if vibration is prohibited, the user can notice an incoming call or an alarm.

  Further, the display unit 214 notifies the user that the vibration is prohibited because the wireless power feeding efficiency may be reduced. Note that the speaker 212 may be used to notify the user of the above. Further, in order to prevent the efficiency of wireless power feeding from being lowered, the user may be notified that notification is performed by light or sound instead of vibration. Thereby, the user can know that the vibration is prohibited (or the vibration setting is canceled) so as not to decrease the wireless power feeding efficiency. Further, the user can know that an incoming call or alarm is notified by light or sound instead of vibration.

  Thereafter, the power storage unit 207 is charged (S313). Then, the control unit 204 determines whether or not the power storage unit 207 is fully charged (S314). When fully charged, the vibration of the vibration unit 205 is permitted (S315), and the charging is terminated. On the other hand, if the battery is not fully charged, the process returns to S313 to continue charging.

  As described above, whether or not vibration of the power receiving device during power reception is prohibited depends on the power reception status (for example, wired power supply, electromagnetic induction power supply, magnetic resonance power supply, or electromagnetic induction power supply). In this case, it can be selectively performed according to the positional relationship between the power transmission area and the wireless power receiving unit.

  Furthermore, the number of devices that the wireless power transmitting apparatus 101 is transmitting is acquired from the wireless power transmitting apparatus 101, and when the power is transmitted to a plurality of apparatuses, the vibration of the vibration unit 205 may be prohibited. . Accordingly, it is possible to prevent the position of the other power receiving apparatus from being changed due to the vibration of the power receiving apparatus 102 and the power supply efficiency of the other power receiving apparatus from being lowered.

  In addition, when the power transmission unit 208 is large, it is considered that there is a low possibility that the power supply efficiency is greatly reduced due to movement due to vibration. Therefore, the size (area) of the power transmission unit 208 of the wireless power transmission apparatus 101 may be included in the control information, and vibration may be permitted when the size of the power transmission unit 208 is larger than a predetermined size. .

DESCRIPTION OF SYMBOLS 101 Wireless power transmission apparatus 102 Power reception apparatus 201 Control part 202 Power reception apparatus detection part 203 Storage part 204 Control part 205 Vibration part 206 Power transmission apparatus detection part 207 Power storage part 208 Power transmission part 209 Wireless power reception part 210 Storage part 211 Wired power reception part 212 Speaker 213 Prohibition Part 214 Display part

Claims (12)

A power receiving device having a vibrating part,
A power receiving means for receiving power from the power transmission device by a power receiving method selected from a plurality of power receiving methods including a power receiving method using electromagnetic induction and a power receiving method using magnetic resonance;
Determining means for determining a power receiving method used for power reception by the power receiving means;
A power receiving apparatus comprising: a prohibiting unit that prohibits vibration by the vibrating unit according to a determination result by the determining unit. The plurality of power receiving methods include a power receiving method using a wire,
2. The power receiving device according to claim 1, wherein the prohibiting unit does not prohibit the vibration by the vibrating unit when the power receiving method determined by the determining unit is a power receiving method using a wired connection.   The prohibiting unit does not prohibit the vibration by the vibrating unit when the power receiving method determined by the determining unit is a power receiving method using magnetic resonance, and when the power receiving method uses electromagnetic induction, The power receiving device according to claim 1, wherein vibration by the vibration unit is prohibited.   When the power receiving method determined by the determining unit is a method using electromagnetic induction, the prohibiting unit performs vibration by the vibrating unit according to a positional relationship between a power transmission region of the power transmitting device and the power receiving unit. The power receiving device according to claim 1, wherein the power receiving device is prohibited. A speaker that outputs sound;
When the power receiving method determined by the determining unit is a method in which the power receiving unit receives power wirelessly and the sound is output using the speaker, the prohibiting unit is configured to vibrate by the vibrating unit. The power receiving device according to claim 1, wherein the power receiving device is prohibited. A determination unit for determining the efficiency of power reception by the power reception unit;
The power receiving device according to any one of claims 1 to 5, wherein the prohibiting unit prohibits vibration by the vibration unit when the efficiency is less than a predetermined value.   The power receiving device according to any one of claims 1 to 6, wherein when the power reception by the power receiving unit is completed, the prohibiting unit cancels the prohibition of vibration of the vibration unit.   8. The information processing apparatus according to claim 1, further comprising: a notification unit configured to notify the user by sound or display instead of the vibration by the vibration unit when the prohibition unit prohibits the vibration by the vibration unit. The power receiving device according to item 1. A control method for a power receiving device having a vibration part,
A power receiving method used for receiving power by a power receiving means for receiving power from a power transmitting device by a power receiving method selected from a plurality of power receiving methods including a power receiving method using electromagnetic induction and a power receiving method using magnetic resonance. A discriminating step for discriminating;
In accordance with the result of the determination, a prohibiting step for prohibiting vibration by the vibration unit;
A control method characterized by comprising: The plurality of power receiving methods include a power receiving method using a wire,
The control method according to claim 9, wherein the prohibiting step does not prohibit the vibration by the vibration unit when the power receiving method determined by the determining step is a power receiving method using wired communication.   The prohibiting step does not prohibit the vibration by the vibrating unit when the power receiving method determined in the determining step is a power receiving method using magnetic field resonance, and when the power receiving method uses electromagnetic induction, The control method according to claim 9, wherein vibration by the vibration unit is prohibited.   The program for functioning a computer as a power receiving apparatus of any one of Claims 1 thru | or 8.

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