JP2021052552A - Power supply control system and electric device terminal - Google Patents

Abstract

To supply appropriate power to an electric device when it is necessary to operate the electric device.SOLUTION: A power supply control system includes a power supply system 500 including a first magnetic field generation device 501 having a first frequency as a resonance point and a second magnetic field generation device 502 having a second frequency as a resonance point, and further includes a power generation element 141 that has sensitivity in a frequency band having a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency and generates power from magnetic field, a booster circuit 142 that boosts a voltage generated by the power generation element 141, an electric device main body 110 that receives power supply from the booster circuit 142, and a power supply control unit 130 that turns on the power supply to the electric device main body 110 from the booster circuit 142 when the power generation element 141 detects magnetic field to generate power.SELECTED DRAWING: Figure 1

Description

The present invention comprises a power supply control system including a first magnetic field generator having a first frequency as a resonance point and a second magnetic field generator having a second frequency as a resonance point. It relates to an electric device terminal used in the power supply system.

Conventionally, when power supply control of various devices is performed by utilizing the resonance of a magnetic field, the electromotive force that can be taken out becomes a weak voltage if the distance between the receiving side and the transmitting side is increased. It has been difficult to boost a weak voltage to a voltage at which the device can be started (for example, 1 V or more). Therefore, in a system using a magnetic field, it is necessary to make the distance between the device on the receiving side and the device on the transmitting side extremely close.

Further, when the distance between the receiving side and the transmitting side is short, there is a problem that the electromotive force rises excessively. As a result, there is a possibility that the target terminal may break down or the user may be affected by abnormal heat generation. The above problem can be solved by adjusting the resonance frequency, but there is a problem that the hardware becomes redundant because the parameter adjustment mechanism of the passive element in the resonance circuit must be implemented.

Patent Document 1 discloses a magnetic power generation device. In the present invention, it is not mentioned that the power supply is particularly appropriate. Patent Document 2 also discloses a magnetic power generation device, but the purpose is to improve the S / N ratio.

Japanese Unexamined Patent Publication No. 2018-112971 Japanese Unexamined Patent Publication No. 55-139065

As mentioned above, in the conventional magnetic power generation, there is no viewpoint of appropriate supply of electric power. An object of the embodiment of the present invention is to provide a power supply control system and an electric device terminal capable of appropriately supplying electric power to the electric device when the operation of the electric device is required.

The power supply control system according to the embodiment includes a power supply system including a first magnetic field generator having a first frequency as a resonance point and a second magnetic field generator having a second frequency as a resonance point. ,
A power generation element that has sensitivity in a frequency band having a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency and generates power from a magnetic field, and a voltage generated by the power generation element are boosted. When the booster circuit, the main body of the electric device that performs a predetermined function and / or a predetermined process, and the main body of the electric device that receives power supply from the booster circuit, and the power generation element detect a magnetic field to generate power. It is characterized in that it includes an electric device terminal including a power supply control unit that turns on power supply from the booster circuit to the electric device main body.

The block diagram of the power supply control system which concerns on 1st Embodiment of this invention. The figure which shows the sensitivity region of the power generation element used by the power supply control system which concerns on 1st Embodiment of this invention. The figure explaining the boosting operation of the boosting circuit used by the power supply control system which concerns on 1st Embodiment of this invention. The figure explaining the boosting operation of the boosting circuit used by the power supply control system which concerns on 1st Embodiment of this invention in the area of a predetermined magnetic field environment. The figure explaining the boosting operation under the control by the boost control part of the boost circuit used by the power supply control system which concerns on 1st Embodiment of this invention. The figure explaining the magnetic field monitoring operation used by the power supply control system which concerns on 1st Embodiment of this invention. The flowchart for demonstrating the operation performed in the power supply control system which concerns on 1st Embodiment of this invention. The figure explaining the 1st example of the change of the magnetic field environment of the place where the power supply control system which concerns on 1st Embodiment of this invention is turned on. The figure explaining the 2nd example of the change of the magnetic field environment of the place where the power supply control system which concerns on 1st Embodiment of this invention is turned on. The block diagram of the electric equipment terminal which concerns on 2nd Embodiment of this invention. FIG. 3 is a configuration diagram of an authentication device included in an electric device terminal according to a second embodiment of the present invention. The flowchart for demonstrating the operation of the electric apparatus terminal which concerns on 2nd Embodiment of this invention. FIG. 3 is a configuration diagram of an authentication device included in an electric device terminal according to a third embodiment of the present invention. The flowchart for demonstrating the operation of the electric apparatus terminal which concerns on 3rd Embodiment of this invention. FIG. 3 is a configuration diagram of an authentication device included in an electric device terminal according to a third embodiment of the present invention. The flowchart for demonstrating the operation of the electric apparatus terminal which concerns on 4th Embodiment of this invention.

The power supply control system and the electric device terminal according to the embodiment of the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are designated by the same reference numerals, and duplicate description will be omitted. FIG. 1 shows a configuration diagram of a power supply control system according to the first embodiment of the present invention. The power supply control system according to the present embodiment includes a power supply system 500 and an electric device terminal 100. The power supply system 500 includes a first magnetic field generator 501 having a first frequency as a resonance point and a second magnetic field generator 502 having a second frequency as a resonance point. A magnetic field is generated together with the first magnetic field generator 501 and the second magnetic field generator 502, and is provided on the ground of the area A11 in, for example, a circular area A11 and an area A12 at the center of the area A11. Although the size of the area A11 and the area A12 is not limited, power can be generated in the area A11 by the magnetic fields of the first magnetic field generator 501 and the second magnetic field generator 502. The areas A11 and A12 may exist inside the building or outdoors.

In FIG. 1, the electric device terminal 100 is held by the person P in his / her hand, but is not limited to the one that can be held and moved in his / her hand, and has the electric device main body 110 that performs a predetermined function and / or a predetermined process. The electric device main body 110 can be a home appliance such as a television or a vacuum cleaner, an electronic device such as a personal computer, or a device that operates with an electric power source at some time such as an automobile.

The electric device terminal 100 includes a control power supply unit 140 and a power supply control unit 130 in addition to the electric device main body 110. The control power supply unit 140 includes a power generation element 141, a booster circuit 142, and a booster control unit 143. The power generation element 141 has sensitivity in a frequency band having a predetermined width centered on a frequency at an intermediate point between the first frequency and the second frequency, and generates power from a magnetic field. That is, when the frequency of the resonance point of the first magnetic field generator 501 is f1 in FIG. 2 and the frequency of the resonance point of the second magnetic field generator 502 is f2 in FIG. 2, the frequency f3 of this intermediate point ( It has sensitivity in a frequency range of a predetermined width W centered on = (f1 + f2) / 2).

The booster circuit 142 boosts the voltage generated by the power generation element 141. For example, as shown in FIG. 3, the voltage generated by the power generation element 141 is 30 to 100 mV, which is boosted to about several V (1 to 5 V), which is the operating voltage of the electric device main body 110. The change in the output voltage of the booster circuit 142 is as shown in FIG. Assuming that a voltage of 30 to 100 mV is generated near the outermost edge of the area A11 in FIG. 1, this time is t1. Next, by the time t2 when the person P moves in the direction of the area A12 and reaches the vicinity of the boundary between the area A11 and the area A12, the first magnetic field is increased to the operating voltage of the electric device main body 110. The positions and magnetic field strengths of the generator 501 and the second magnetic field generator 502 are designed, and the booster circuit 142 is designed.

Further, the positions and magnetic field strengths of the first magnetic field generator 501 and the second magnetic field generator 502 can be designed as shown in FIG. The center of the area A12 is the leftmost end of the graph, and the output voltage of the booster circuit 142 of the present embodiment changes as shown in FIG. That is, it is designed so that a constant output continues from the center of the area A12 to an appropriate position of the area A11, and then power can be generated near the outermost edge of the area A11 so that power cannot be generated. Compared with the conventional booster circuit output shown by the broken line in FIG. 4, the booster output to the operating voltage of the electric device main body 110 can be performed up to a distance far from the center of the area A12.

The control power supply unit 140 is provided with a boost control unit 143. The boost control unit 143 controls the output voltage of the boost circuit 142, and the user can select the output voltage of the boost circuit 142 by setting with a switch or the like. For example, as shown in FIG. 5, any one of the output voltage A, the output voltage B, and the output voltage C can be selected. Of course, the output voltage may be controlled continuously instead of three steps. The magnitude of the voltage is output voltage A> output voltage B> output voltage C, which is a reference voltage given to the electric device main body 110 by the “threshold”. The DC / DC converter described in Japanese Patent Application No. 2019-2965 can be adopted for the booster circuit 142.

The power supply control unit 130 operates with the electric power from the booster circuit 142, and supplies power from the booster circuit 142 to the electric device main body 110 when the power generation element 141 detects a magnetic field to generate electric power. It is to be turned on. Regarding whether or not the power generation element 141 detects a magnetic field to generate power, the power supply control unit 130 monitors the voltage output from the power generation element 141, and when the voltage is equal to or higher than a predetermined value, “the magnetic field is generated. It can be determined that "it is detected and power is being generated". The power supply control unit 130 continues or stops power supply to the electric device main body 110 depending on whether or not power is being generated based on the magnetic field by the power generation element 141. The above monitoring can be performed at regular time intervals. That is, as shown in FIG. 6, monitoring is performed at the same time interval T. In the example of FIG. 6, when the magnetic field is equal to or higher than a predetermined value at time t00 and the voltage output from the power generation element 141 is monitored and the voltage is equal to or higher than the predetermined voltage, time t01, time t02, time t03, ...・ ・ Indicates the case of monitoring.

In the power supply control system configured as described above, control is performed according to the flowchart shown in FIG. 7. The person P holding the electric device terminal 100 is in a state of waiting for magnetic field detection before entering the environment in which a magnetic field is generated as shown in FIG. 1 (STEP1), and is in a state of determining whether or not magnetic field is detected. There is (STEP2). In STEP1 and STEP2, no power is generated, so the machine is not operating.

If YES in STEP2, power is generated by the (magnetic) power generation element 141, the generated voltage is boosted by the booster circuit 142, and the generated voltage is supplied to the electric device main body 110 (STEP3). In the next STEP4, the power supply control unit 130 detects whether the magnetic field has a predetermined strength by monitoring the voltage output from the power generation element 141 and checking whether the voltage is equal to or higher than the predetermined voltage (STEP4). If YES in STEP4, STEP3 will continue. As a result, as described with reference to FIG. 3, the time starts at t1, and by the time t2 when the person P moves in the direction of the area A12 and reaches the vicinity of the boundary between the area A11 and the area A12, the electric device main body unit The operating voltage is increased to 110.

Therefore, according to the present embodiment, the power supply environment of the electric device main body 110 is prepared by the time the electric device main body 110 arrives at the area A12 where the operation of the electric device main body 110 is required, and the electric device does not require a particularly waiting time. The main body 110 can be operated. Therefore, when the electric device main body 110 is in a predetermined area, it is possible to accurately apply a usage pattern in which the electric device main body 110 is displayed or voiced as a terminal such as a smartphone for communication and explanation. That is, as long as the electric device terminals 100 are located in the areas A11 and A12, the magnetic field strength of the first magnetic field generator 501 and the magnetic field strength of the second magnetic field generator 502 change, and the second magnetic field is changed as shown in FIG. Even if the magnetic field strength of the generator 502 is weakened, or even if the magnetic field strength of the first magnetic field generator 501 is weakened as shown in FIG. 9, the sensitivity of the power generating element 141 has a frequency as described with reference to FIG. Since it has sensitivity in a frequency range of a predetermined width W centered on f3 (= (f1 + f2) / 2), power generation capable of obtaining a required voltage is performed.

Then, when the result becomes NO in STEP 4 of FIG. 7, the power supply of the electric device main body 110 is stopped (STEP 5). Therefore, when the user goes out to a place where the use of the electric device main body 110 is not permitted (outside the areas A11 and A12), the electric device main body 110 is not used unnecessarily or unauthorizedly. It will be a system that can be used without waste and with appropriate usage restrictions.

FIG. 10 shows the configuration of the electric device terminal 100A according to the second embodiment. The electric device terminal 100A of the present embodiment is different from the electric device terminal 100 according to the second embodiment in that the authentication device 150 is provided, and other configurations are the same. The authentication device 150 receives the operation power supply from the control power supply unit 140 via the power supply control unit 130, and gives the recognition result to the power supply control unit 130. The authentication device 150 may be a biometric authentication device or a device that simply performs password authentication.

The authentication device 150 is, for example, a fingerprint authentication device, and has the configuration shown in FIG. That is, the CPU 20 that performs fingerprint authentication using the program and data stored in the main memory 21 has a configuration in which each unit is collectively controlled. An external storage interface 23, a sensor interface 24, a display interface 25, and a network interface 26 are connected to the CPU 20 via a bus 22.

An external storage device 33 is connected to the external storage interface 23. The external storage device 33 stores fingerprint data of a person who is permitted to use the electric device 110, a fingerprint authentication program, and the like. A capacitive fingerprint sensor 34 is connected to the sensor interface 24. A display device 35 is connected to the display interface 25. The display device 35 has a small display such as an LED, and the authentication result such as "The use of this device is permitted" or "The use of this device is not possible" is displayed. A network line 36 is connected to the network interface 26, and the use of the electric device 110 is permitted periodically or irregularly from a server or the like that manages the electric device system 100 via the network line 36. The contents of the external storage device 33 are updated by downloading the update data of the human fingerprint data and the update program of the fingerprint authentication program.

Since the electric device terminal 100A configured as described above performs processing according to the flowchart shown in FIG. 12, the operation will be described based on this flowchart. The same STEP as the operation of the electric device terminal 100 according to the first embodiment is designated by the same reference numerals as those in FIG. 7. STEP1 and STEP2 are the same as those in the first embodiment, and are in a state of waiting for magnetic field detection (STEP1) and a state of determining whether magnetic field detection has been possible (STEP2). If YES in STEP2, power is generated by the (magnetic) power generation element 141, the generated voltage is boosted by the booster circuit 142, and the power is supplied to the authentication device 150 (STEP3A). Following STEP3A, it is determined whether the authentication was successful (STEP11), and if NO, a display such as "This device cannot be used" is displayed on the display device 35 (STEP12), and the main body of the electrical device that is currently supplying power. The power supply to the unit 110 is stopped (STEP5A), and the process is terminated.

On the other hand, when the branch to YES in STEP 11, the supply is made to the electric device main body 110, and the electric device main body 110 is in a usable state (STEP 3). In this STEP3, a display such as "The use of this device is permitted" may be displayed on the display device 35. After STEP3, the electric device 210 is used, the voltage output from the power generation element 141 is monitored, and the power supply control unit 130 detects whether the voltage is equal to or higher than a predetermined value (STEP4). If YES in STEP4, the use of the electric device main body 110 is continued in STEP3.

As described above, in the present embodiment, as a result of the authentication processing being performed, the time required for this is required, but basically, as in the first embodiment, the area where the operation of the electric device main body 110 is required. By the time it arrives at A12, the power supply environment of the electric device main body 110 is ready, and the electric device main body 110 can be operated without particularly requiring a waiting time. If NO is set in STEP 4 of FIG. 12, the power supply to the electric device main body 110 is stopped (STEP 5A).

FIG. 13 shows the configuration of the electric device terminal 100T according to the third embodiment. The electric device terminal 100T is provided with a control power supply unit 140A and a control power supply unit 140B, and power can be supplied from either of them.

The control power supply unit 140A includes a first power generation element 141A and a first booster circuit 142A. The control power supply unit 140B includes a second power generation element 141B and a second booster circuit 142B. The first power generation element 141A has sensitivity in the third frequency band. The second power generation element 141B has sensitivity in the fourth frequency band. The third frequency band and the fourth frequency band are included in a frequency range having a predetermined width W centered on the frequency f3 (= (f1 + f2) / 2) at the midpoint described in FIG. The third frequency band and the fourth frequency band may be the same frequency band or different frequency bands.

The first booster circuit 142A boosts the voltage generated by the first power generation element 141A several times under the control of the boost control unit 143, up to the operable voltage of the electric device main body 110. Boost the voltage. The second booster circuit 142B boosts the voltage generated by the second power generation element 141B several times under the control of the boost control unit 143, up to the operable voltage of the electric device main body 110. Boost the voltage.

The power supply control unit 130 boosts the voltage generated by the power generation element that first detects the magnetic field and starts power generation among the first power generation element 141A or the second power generation element 141B. The circuit 142A or the second booster circuit 142B is selected to control the power supply from the booster circuit to the electric device main body 110.

The electric device terminal 100T having the above configuration operates as shown in the flowchart shown in FIG. That is, the power supply control unit 130 supplies the power from the booster circuit on the power generation element side, which has first detected the magnetic field and started power generation, to the electric device main body 110 (STEP21), and the voltage on the current power generation element side. Whether (that is, the voltage from the booster circuit) is excessive or excessive is detected using a predetermined threshold (STEP22). In addition, the case where it becomes excessive is the case where it is extremely close to the source of the magnetic field, and the case where it becomes too small is the case where it is out of the usable area or the licensed area of the electric device terminal 100T.

If NO is set in STEP22, the current power supply state is maintained (STEP23), and the process returns to STEP22 to continue the process. On the other hand, if YES in the above STEP22, the electric power on the power generation element side different from the currently selected power generation element side (that is, the electric power from the booster circuit) is supplied to the electric device main body 110 (STEP24), and the above STEP22 Return to and continue processing. While relating to such power supply, the ki device terminal 100T performs the processing operation described with reference to FIG. 7. Thus, according to the present embodiment, it is possible to extremely reduce the possibility that the electric device terminal 100T will break down or the user will be unexpectedly damaged due to an excessive electric field, and the frequency is in the area where it should originally operate. It is possible to recover from a failure that makes it difficult to detect the magnetic field in the band.

FIG. 15 shows the configuration of the electric device terminal 100F according to the fourth embodiment. The electric device terminal 100F includes a control power supply unit 140A and a control power supply unit 140B for the electric device terminal 100A according to the second embodiment, and power can be supplied from either of them. That is, the configuration according to the combination of the second embodiment and the third embodiment is adopted.
The specific configuration is as described in the third embodiment, and the description thereof will be omitted.

The operation flowchart of the electric device terminal 100F according to the fourth embodiment is as shown in FIG. The flowchart shown in FIG. 16 is substantially the same as the operation flowchart of the electric device terminal 100T according to the third embodiment shown in FIG. The different steps are STEP21F and STEP24F.

In STEP21F, which is a modification of STEP21 of the third embodiment, the power from the booster circuit on the power generation element side that has started power generation by detecting the magnetic field first is applied to the operating device of the electric device main body 110 and the authentication device 150. Supply to. Further, in STEP24F which is a modification of STEP24 of the third embodiment, the power on the power generation element side different from the currently selected power generation element side (that is, the power from the booster circuit) is certified as the electric device main body 110. It is supplied to the operating device of the device 150.

According to this fourth embodiment, it is possible to extremely reduce the possibility that the electric device terminal 100F including the authentication device 150 breaks down or the user is unexpectedly damaged due to an excessive electric field, and the area should be operated originally. It is possible to recover from a failure that makes it difficult to detect a magnetic field in a certain frequency band despite being present, and it is possible to fully demonstrate the functions of the electric device terminal 100F including authentication.

A11, A12 Area 100, 100A, 100F, 100T Electrical equipment terminal 110 Electrical equipment main unit 130 Power supply control unit 140, 140A, 140B Control power supply unit 141 Power generation element 141A First power generation element 141B Second power generation element 142 Boost Circuit 142A First booster circuit 142B Second booster circuit 143 Booster control unit 150 Authentication device 500 Power supply system 501 First magnetic field generator 502 Second magnetic field generator

Claims (10)

A first magnetic field generator having a first frequency as a resonance point,
A second magnetic field generator having a second frequency as a resonance point,
Power supply system equipped with
A power generation element that has sensitivity in a frequency band having a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency and generates power from a magnetic field.
A booster circuit that boosts the voltage generated by the power generation element,
An electric device main body that performs a predetermined function and / or a predetermined process, and receives power from the booster circuit.
A power supply control unit that turns on the power supply from the booster circuit to the main body of the electric device when the power generation element detects a magnetic field to generate power.
Electrical equipment terminal equipped with
A power supply control system characterized in that it is configured to include. The power generation element is composed of a first power generation element having sensitivity in a third frequency band and a second power generation element having sensitivity in a fourth frequency band.
The booster circuit is composed of a first booster circuit that boosts the voltage generated by the first power generation element and a second booster circuit that boosts the voltage generated by the second power generation element.
The power supply control unit is a first booster circuit or a first booster circuit of the first power generation element or the second power generation element that boosts the voltage generated by the power generation element that first detects the magnetic field and starts power generation. The power supply control system according to claim 1, wherein a second booster circuit is selected to supply power from the booster circuit to the main body of the electric device. When the voltage supplied to the electric device is equal to or higher than a predetermined threshold value, the power supply control unit switches from the currently selected booster circuit to the currently unselected booster circuit, and the electric device main body unit. The power supply control system according to claim 2, wherein the power supply to the power supply is performed. The electric device terminal has an authentication unit having an authentication function, and has an authentication unit.
The power supply according to any one of claims 1 to 3, wherein the power supply control unit continues or stops power supply to the electric device main body based on the authentication result by the authentication unit. Control system. The power supply control unit according to any one of claims 1 to 4, wherein the power supply control unit continues or stops power supply to the electric device main body depending on whether or not power generation is performed based on a magnetic field by the power generation element. The power supply control system according to any one item. In an electrical equipment terminal used in a power supply system including a first magnetic field generator having a first frequency as a resonance point and a second magnetic field generator having a second frequency as a resonance point.
A power generation element that has sensitivity in a frequency band having a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency and generates power from a magnetic field.
A booster circuit that boosts the voltage generated by the power generation element,
An electric device main body that performs a predetermined function and / or a predetermined process, and receives power from the booster circuit.
A power supply control unit that turns on the power supply from the booster circuit to the main body of the electric device when the power generation element detects a magnetic field to generate power.
Electrical equipment terminal equipped with. The power generation element is composed of a first power generation element having sensitivity in a third frequency band and a second power generation element having sensitivity in a fourth frequency band.
The booster circuit is composed of a first booster circuit that boosts the voltage generated by the first power generation element and a second booster circuit that boosts the voltage generated by the second power generation element.
The power supply control unit is a first booster circuit or a first booster circuit of the first power generation element or the second power generation element that boosts the voltage generated by the power generation element that first detects the magnetic field and starts power generation. The electric device terminal according to claim 6, wherein a second booster circuit is selected to supply power from the booster circuit to the main body of the electric device. When the voltage supplied to the electric device is equal to or higher than a predetermined threshold value, the power supply control unit switches from the currently selected booster circuit to the currently unselected booster circuit, and the electric device main body unit. The electrical equipment terminal according to claim 7, wherein power is supplied to the electric device. It has an authentication unit with an authentication function,
The electric device according to any one of claims 6 to 8, wherein the power supply control unit continues or stops power supply to the electric device main body based on the authentication result by the authentication unit. Terminal. The power supply control unit according to claim 6 to 9, wherein the power supply control unit continues or stops power supply to the electric device main body depending on whether or not power generation is performed based on a magnetic field by the power generation element. The electrical equipment terminal according to any one of the items.

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