JP5273818B2 - Power feeding device, power receiving device, power feeding system, and power feeding control method - Google Patents

Description

  The present invention relates to a technique for supplying power using a communication cable.

  A technique for supplying electric power using a communication cable has been devised. One such power supply technology is PoE (Power over Ethernet: registered trademark). In the power supply system that employs PoE, when a power supply device and a power reception device are connected, power is always supplied to the power reception device. However, some power receiving devices are not always used, and it is a waste of energy to constantly supply power to such power receiving devices.

  For example, Patent Document 1 discloses a system that reduces power supply time by controlling power supply in accordance with the communication status of a packet from a power reception device. Patent Document 2 discloses a system that intermittently supplies power for a short time during the low consumption mode.

JP 2009-170983 A JP 2009-088833 A

  In the system of Patent Document 1, power supply is stopped when the power supply device does not receive a specific packet from the power reception device for a predetermined time. In the system of Patent Document 2, the server detects the end of the call and requests the power supply device to stop power supply. In either of the devices disclosed in Patent Literature 1 and Patent Literature 2, since the start and stop of power feeding cannot be controlled from the power receiving device side, the convenience of the user who uses the power receiving device cannot be reliably ensured. . In addition, power consumption can be more efficiently suppressed by immediately starting power supply when the user uses the device on the power receiving device and immediately stopping power supply when the user stops using the device.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a power feeding device, a power receiving device, a power feeding system, and a power feeding control method capable of efficiently suppressing power consumption in a power feeding system using a communication cable. Is to provide.

  Another object of the present invention is to provide a power feeding device, a power receiving device, a power feeding system, and a power feeding control method capable of ensuring user convenience in a power feeding system using a communication cable.

The present invention receives a power supply start instruction transmitted from the power receiving device in response to detection of an ON signal input from a user interface in the power receiving device, and performs power supply via the communication cable to the power receiving device. In response to the detection of the off signal input from the user interface in the power receiving device, the power receiving device receives a power supply stop instruction transmitted from the power receiving device, and stops power supply to the power receiving device via a communication cable. It is a power feeding device.

In accordance with detection of an on signal input from a user interface , the present invention transmits a power supply start instruction to a power supply apparatus that supplies power via a communication cable, and detects an off signal input from the user interface. In response , the power receiving apparatus transmits a power supply stop instruction to the power supply apparatus.

The present invention transmits a power supply start instruction to the power supply apparatus in response to detection of an on signal input from the user interface, and to the power supply apparatus in response to detection of an off signal input from the user interface. A power receiving device that transmits a power supply stop instruction and a power supply start instruction, the power receiving device that is the transmission source of the instruction starts power supply via a communication cable, and the power supply stop instruction is received. A power supply system comprising: a power supply device that stops power supply via a communication cable to a power receiving device that is a transmission source of the instruction.

According to the present invention, the power receiving device transmits an instruction to start power feeding to the power feeding device in response to the detection of the ON signal input from the user interface , and the power feeding device receives the instruction to start power feeding. In response to the detection of the off signal input from the user interface , the power receiving device transmits an instruction to stop power feeding to the power receiving device. A power supply control method, wherein a power supply device receives an instruction to stop power supply and stops power supply via a communication cable to a power reception device that is a transmission source of the instruction.

  According to the present invention, power consumption can be efficiently suppressed in a power feeding system using a communication cable.

FIG. 1 is a block diagram of a power feeding system according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the power receiving device in the process of starting or stopping the power supply to the power receiving device in response to the input of the user interface. FIG. 3 is a flowchart for explaining the operation of the power feeding device in the process of starting or stopping the power feeding to the power receiving device in response to the input of the user interface. FIG. 4 is a flowchart for explaining the operation of the power feeding device in the process of feeding power to the power receiving device using a timer. FIG. 5 is a flowchart for explaining the operation of the power receiving device in the process of requesting power supply based on the remaining power of the power storage unit. FIG. 6 is a configuration diagram of a power feeding system when a power feeding control signal is transmitted and received wirelessly. FIG. 7 is a system configuration diagram when a two-wire cable, a coaxial cable, or the like is used as a communication cable.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram of a power feeding system according to an embodiment of the present invention. This power feeding system includes a power feeding device 10 and a power receiving device 20, and these devices are connected by a communication cable 30 such as an Ethernet (registered trademark) cable. In the power supply system of the present embodiment, for example, PoE (Power over Ethernet) is adopted as a power supply method using the communication cable 30.

  The power supply device 10 includes a power supply device (PSE: Power Sourcing Equipment) 11, a filter 12, a controller 13, a power supply control signal receiver 14, a communication unit 15, a signal transformer 16, and a timer 17.

  The power feeding device 11 supplies power.

  The filter 12 separates a power source controlled by the power feeding device 11 and a power feeding control signal handled by the power feeding control signal receiving unit 14.

  The controller 13 controls the power feeding device 11 and the power feeding control signal receiving unit 14 based on the power feeding control signal from the power receiving device 20 and the time information from the timer 17.

  The power supply control signal receiving unit 14 detects reception of a power supply control signal for starting or stopping power supply.

  The signal transformer 16 determines whether the signal received from the power receiving device 20 is a main signal or a power supply control signal, and distributes the signal to the communication unit 15 and the filter 12.

  The timer 17 supplies time information to the controller 13.

  The power receiving device 20 includes a power receiving device 21, a filter 22, a microcontroller 23, a power supply control signal transmission unit 24, a power storage unit 25, a communication unit 26, a signal transformer 27, and a user interface 28.

  A power receiving device (PD) 21 receives power from the power feeding device 11.

  The filter 22 superimposes the power supply controlled by the power receiving device 21 and the power supply control signal handled by the power supply control signal transmission unit 24.

  The microcontroller 23 controls the power receiving device 21 and the power supply control signal transmission unit 24 based on the input from the user interface 28. Further, the microcontroller 23 monitors the remaining amount of power from the voltage value of the voltage of the power supplied from the power storage unit 25 and controls the power receiving device 21 and the power supply control signal transmission unit 24 based on the monitoring result.

  The power supply control signal transmission unit 24 transmits a power supply control signal.

  The power storage unit 25 stores power for operating the microcontroller 23 and the power supply control signal transmission unit 24 when the power receiving device 20 is not receiving power from the power supply device 10.

  The communication unit 26 and the signal transformer 27 communicate with the power supply device 10 using a main signal.

  The user interface 28 includes, for example, contacts and sensors, and inputs an on signal or an off signal to the microcontroller 23 in accordance with an operation by the user for starting or ending the operation of the power receiving device 20. For example, when the user interface 28 is a power switch of the power receiving device 20, this is detected when the power switch is turned on or off, and an on signal or an off signal is input to the microcontroller 23. Further, when the power receiving device 20 is a telephone, the user interface 28 detects whether the handset is raised or lowered, and inputs an on signal or an off signal to the microcontroller 23.

  Next, operations of the power feeding device 10 and the power receiving device 20 in a process in which power feeding to the power receiving device 20 is started in response to an input from the user interface 28 will be described.

  First, the operation of the power receiving device 20 will be described with reference to FIG. Note that the power receiving device 20 is in a state where the power receiving device 21 is not supplied with power from the power supply device 10 (no power receiving state). In the no power receiving state, the microcontroller 23 and the power supply control signal transmission unit 24 are supplied with electric power from the power storage unit 25 and maintain an operable state.

  When the user interface 28 detects an operation for starting the operation of the power receiving device 20, the user interface 28 inputs an ON signal to the microcontroller 23. When the microcontroller 23 detects an ON signal input from the user interface 28 (step S21: YES), the microcontroller 23 instructs the power supply control signal transmission unit 24 to transmit a power supply control signal for starting power supply. In response to this instruction, the power supply control signal transmitter 24 transmits a power supply control signal for starting power supply (step S22). The transmitted power supply control signal is output to the communication cable 30 through the filter 22 and the signal transformer 27.

  Thereafter, the microcontroller 23 determines whether the state of the power receiving device 20 has changed from a non-power receiving state to a power receiving state (a state where the power receiving device 20 is receiving power from the power feeding device 10), that is, the power receiving device 21 supplies power. Is determined (step S23).

  When it is determined that the power receiving device 21 is not receiving power (step S23: NO), the microcontroller 23 again transmits a power supply control signal for starting power supply from the power supply control signal transmitting unit 24 (step S22). If the power receiving device 21 is in a power receiving state, the process is terminated (step S23: YES).

  Next, the operation of the power supply apparatus 10 will be described with reference to FIG. In the power feeding device 10, it is assumed that the power feeding control signal transmitted from the power receiving device 20 is input to the power feeding control signal receiving unit 14 through the signal transformer 16 and the filter 12.

  When detecting the reception of the power supply control signal (step S31), the power supply control signal receiving unit 14 notifies the controller 13 of the detection of the power supply control signal. The controller 13 instructs the power feeding device 11 to start power feeding (step S32). In response to this instruction, the power supply device 11 starts to supply power to the power receiving device 20. The power output by the power feeding device 11 passes through the filter 12 and the signal transformer 16, is output to the communication cable 30, and is input to the power receiving device 20.

  Next, operations of the power feeding device 10 and the power receiving device 20 in a process of stopping power feeding to the power receiving device 20 in response to an input from the user interface 28 will be described.

  First, the operation of the power receiving device 20 will be described with reference to FIG. It is assumed that the power receiving device 20 is in a power receiving state.

  When the user interface 28 detects an operation for ending the operation of the power receiving device 20, the user interface 28 inputs an off signal to the microcontroller 23. When the microcontroller 23 detects an off signal input from the user interface 28 (step S21: YES), the microcontroller 23 instructs the power supply control signal transmission unit 24 to transmit a power supply control signal for stopping power supply. In response to this instruction, the power supply control signal transmitter 24 transmits a power supply control signal for stopping power supply (step S22). The transmitted power supply control signal is output to the communication cable 30 through the filter 22 and the signal transformer 27.

  Thereafter, the microcontroller 23 determines whether the state of the power receiving device 20 has transitioned from the power receiving state to the no power receiving state, that is, whether the power receiving device 21 has not received power (step S23).

  When it is determined that the state of the power receiving device 20 has not changed to the non-power receiving state, that is, the power receiving device 21 is receiving power (step S23: YES), the microcontroller 23 again supplies the power supply control signal transmission unit 24. Transmits a power supply control signal for stopping power supply (step S22).

  Further, when the power receiving device 20 has transitioned to the non-power receiving state, that is, when it is determined that the power receiving device 21 is not receiving power, the microcontroller 23 switches the power source to the power storage unit 25 and ends this processing ( Step S23: YES).

  On the other hand, on the power feeding device 10 side, the power feeding control signal transmitted from the power receiving device 20 is input to the power feeding control signal receiving unit 14 through the signal transformer 16 and the filter 12.

  When detecting the power supply control signal (step S31), the power supply control signal receiving unit 14 notifies the controller 13 of the detection of the power supply control signal. The controller 13 instructs the power feeding device 11 to stop power feeding (step S32). In response to this instruction, the power supply device 11 stops power supply to the power receiving device 20.

  Next, the operation of the power feeding device 10 in the process of feeding power to the power receiving device 20 using the timer 17 will be described with reference to FIG.

  When the controller 13 of the power supply device 10 detects that the power supply device 11 has stopped supplying power to the power receiving device 20 (step S41: YES), the controller 13 starts counting the timer 17 (step S42).

  The controller 13 determines whether the time counted by the timer 17 has passed the predetermined time (step S43). If the controller 13 determines that the predetermined time has passed (step S43: YES), the controller 17 counts the time by the timer 17. Stop (step S44), and instruct the power feeding device 11 to start power feeding. Receiving the power supply instruction, the power supply device 11 starts power supply to the power receiving device 20 (step S45).

  The controller 13 waits until charging of the power storage unit 25 of the power receiving device 20 is completed (step S46: NO). When charging of the power storage unit 25 is completed (step S46: YES), power supply to the power feeding device 11 is stopped. To instruct. In response to this instruction, the power feeding device 11 stops power feeding (step S47).

  Note that the method in which the power feeding device 10 determines the completion of charging of the power storage unit 25 of the power receiving device 20 in step S46 is arbitrary. For example, the power receiving device 20 that has detected the completion of charging of the power storage unit 25 transmits a charging completion signal to the power feeding device 10, and the power feeding control signal receiving unit 14 of the power feeding device 10 detects this charging completion signal. The controller 13 may be notified. Alternatively, the time required for charging the power storage unit 25 is set in advance in the power supply device 10, and the controller 13 determines the completion of charging of the power storage unit 25 based on the set time and the time information from the timer 17. Also good.

  Next, the operation of the power receiving device 20 in the process of requesting power supply based on the remaining power of the power storage unit 25 will be described with reference to FIG.

  When the microcontroller 23 of the power receiving device 20 detects that the power supply to the power receiving device 21 is stopped (step S51: YES), the microcontroller 23 starts monitoring the remaining power in the power storage unit 25 (step S52). Specifically, the voltage value of the electric power supplied from the power storage unit 25 may be confirmed every predetermined time.

  When the power supply is stopped, the microcontroller 23 and the power supply control signal transmission unit 24 receive power from the power storage unit 25 and maintain an operable state.

  The microcontroller 23 continues monitoring until the remaining power of the power storage unit 25 becomes a predetermined threshold value or less (step S53: NO). When it is detected that the remaining power is equal to or less than the threshold (step S53: YES), the microcontroller 23 instructs the power supply control signal transmission unit 24 to transmit a power supply control signal for starting power supply. Put out. Receiving the instruction, the power supply control signal transmission unit 24 transmits a power supply control signal for starting power supply to the power supply apparatus 10 (step S54).

  The microcontroller 23 determines whether the state of the power receiving device 20 has transitioned to the power receiving state (step S55). If it is determined that the power reception state has not been changed (step S55: NO), the microcontroller 23 again transmits a power supply control signal for starting power supply from the power supply control signal transmission unit 24 (step S54).

  If it is determined that the power receiving state has been changed (step S55: YES), the microcontroller 23 starts charging the power storage unit 25 (step S56).

  The microcontroller 23 determines whether or not the charging state of the power storage unit 25 has been completed (step S57). If it is determined that charging has not been completed (step S57: NO), the microcontroller 23 maintains the charging state. Moreover, when it determines with charging having been completed (step S57: YES), monitoring of the electric power residual amount of the electrical storage part 25 is stopped (step S58).

  The microcontroller 23 instructs the power supply control signal transmission unit 24 to transmit a power supply control signal for stopping power supply. The power supply control signal transmission unit 24 that has received the instruction transmits a power supply control signal for stopping power supply to the power supply device 10 (step S59).

  The microcontroller 23 determines whether or not the state of the power receiving device 20 has transitioned to the non-power receiving state (step S60). When it is determined that the power receiving device 20 has not transitioned to the non-power receiving state (step S60: NO), the power supply control signal is transmitted again. The power supply control signal for starting power supply is transmitted from the unit 24 (step S59).

  Moreover, when it determines with the electric power feeding having stopped (step S60: YES), this process is complete | finished.

  As described above, according to the present embodiment, a power supply control signal for starting or stopping power supply is transmitted from the power receiving device 20 to the power feeding device 10 at a timing required by the user. Start or stop power feeding. As a result, when the user uses the device on the power receiving device side, power supply can be started immediately, so that the convenience of the user who uses the power receiving device can be reliably ensured. In addition, when the user stops using the device on the power receiving device side, power supply can be stopped immediately, so that power consumption can be more efficiently suppressed.

  Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea.

  For example, the power supply control signal may be transmitted and received wirelessly. The configuration of the power feeding system in this case is illustrated in FIG. In this power feeding system, the power feeding control signal receiving unit 14 and the power feeding control signal transmitting unit 24 include antennas, and transmit and receive signals such as a power feeding control signal through wireless communication. Further, since it is not necessary to superimpose and separate the power source and the power supply control signal, the filter 12 and the filter 22 may be omitted. About points other than these, it is the same as that of embodiment mentioned above.

  A communication cable other than the Ethernet cable may be used as a cable for connecting the power supply device 10 and the power receiving device 20. For example, FIG. 7 illustrates a configuration of a power supply system when a two-wire cable, a coaxial cable, or the like is used as a communication cable for connecting the power supply device 10 and the power reception device 20. In this system, power is fed or received from the middle point of the signal transformer as in the power feeding system of FIG. 1, and the control signal and communication signal are superimposed and separated by the DC power source by the filter 12 and the filter 22. I do. Other than that, it is the same as the embodiment described above.

  The power feeding method need not be determined as PoE, and another power feeding method that can control power feeding to the power receiving device 20 by the controller 13 and the power feeding device 11 of the power feeding device 10 may be used.

  A system configuration in which the power feeding device 10 is connected to a plurality of power receiving devices 20 may be employed.

  Examples of the power receiving device 20 include, but are not limited to, a telephone, a television, a telephone, a webcam, an access point, and the like.

  The controller 13 of the power supply device 10 and the microcontroller 23 of the power reception device 20 of the power supply system according to the embodiment of the present invention described above read and execute an operation program or the like stored in a memory by a CPU (Central Processing Unit). Or may be configured by hardware. Only some functions of the above-described embodiments can be realized by a computer program.

10 Power supply equipment 11 Power supply device (PSE)
DESCRIPTION OF SYMBOLS 12 Filter 13 Controller 14 Power supply control signal receiving part 15 Communication part 16 Signal transformer 17 Timer 20 Power receiving apparatus 21 Power receiving device 22 Filter 23 Microcontroller 24 Power supply control signal transmission part 25 Power storage part 26 Communication part 27 Signal transformer 28 User interface 30 communication cable

Claims (9)

In response to the detection of the ON signal input from the user interface in the power receiving device, the power receiving device receives an instruction to start power feeding and performs power feeding through the communication cable to the power receiving device.
In response to the detection of the off signal input from the user interface in the power receiving device, the power receiving device receives a power supply stop instruction transmitted from the power receiving device, and stops power supply to the power receiving device via a communication cable. A power supply device. The power supply apparatus according to claim 1, wherein the power supply start instruction and the power supply stop instruction are transmitted from the power receiving apparatus via the communication cable . The instruction includes an instruction transmitted in accordance with the remaining amount of power stored in the electricity storage portion of the power receiving device,
The power feeding device according to claim 1, wherein the power feeding device is a power feeding device. Power is supplied to the power receiving device via the communication cable at regular intervals, and power supply is stopped when charging of the power storage unit of the power receiving device is completed.
The power feeding device according to claim 1, wherein the power feeding device is a power feeding device. In response to detection of an ON signal input from the user interface, an instruction to start power supply is transmitted to the power supply apparatus that performs power supply via the communication cable.
A power receiving apparatus that transmits a power supply stop instruction to the power supply apparatus in response to detection of an off signal input from a user interface . Sending the power supply start instruction to the power supply device via the communication cable ,
The power reception device according to claim 5, wherein the power supply stop instruction is transmitted to the power supply device via the communication cable . Monitoring the remaining amount of power stored in the power storage unit, and transmitting the instruction according to the remaining amount;
The power receiving device according to claim 5 or 6. In response to detection of an on signal input from the user interface, an instruction to start power supply is transmitted to the power supply device, and in response to detection of an off signal input from the user interface , power supply is stopped to the power supply device. A power receiving device for transmitting the instruction;
In response to the instruction to start power supply, power supply to the power receiving device that is the transmission source of the instruction is started via a communication cable, and to the power reception device that is the transmission source of the instruction in response to the instruction to stop power supply. A power supply device that stops power supply via a communication cable;
A power supply system comprising: In response to the detection of the ON signal input from the user interface , the power receiving device transmits an instruction to start power feeding to the power feeding device.
The power supply apparatus receives the instruction to start the power supply, and starts power supply via the communication cable to the power receiving apparatus of the transmission source of the instruction,
In response to the detection of the off signal input from the user interface , the power receiving device transmits an instruction to stop power feeding to the power feeding device,
A power supply control method, wherein a power supply apparatus receives an instruction to stop power supply and stops power supply via a communication cable to a power reception apparatus that is a transmission source of the instruction.

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