WO2019044465A1 - Power receiving antenna, power receiving device, antenna component, and method for assembling power receiving antenna - Google Patents

Abstract

This power receiving antenna is provided with an antenna unit having a first component and a second component that is attachable/detachable to/from the first component, and receives supplied power by receiving radio waves at the antenna unit.

Description

Receiving antenna, receiving apparatus, antenna component, and method of assembling receiving antenna Cross-reference to related applications

This application claims the priority of Japanese Patent Application No. 2017-164567 (filed on August 29, 2017), the entire disclosure of which is incorporated herein by reference.

The present disclosure relates to a power receiving antenna, a power receiving device, an antenna component, and a method of assembling the power receiving antenna.

There is known a power reception device which reflects radio waves by a reflecting mirror formed integrally with an antenna to enhance power reception efficiency (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 2003-258544

A power receiving antenna according to an embodiment of the present disclosure includes an antenna unit having a first component and a second component that is detachable from the first component. The power receiving antenna receives radio wave feeding at the antenna unit.

A power receiving device according to an embodiment of the present disclosure is connected to an antenna unit that receives radio wave power feeding. A part of the antenna unit is configured to be removable.

The antenna component according to an embodiment of the present disclosure is a part of a power receiving antenna that receives radio wave feeding, and is configured to be detachable from the power receiving antenna.

A method of assembling a power receiving antenna according to an embodiment of the present disclosure combines a first component that constitutes at least a part of an antenna unit that receives radio wave feeding, and a second component that is detachable from the first component.

It is a block diagram showing an example of composition of a power receiving antenna concerning one embodiment. It is an appearance perspective view showing an example of composition of a power receiving antenna concerning one embodiment. It is a figure which shows an example of the power transmission system containing a power receiving apparatus and a power transmission apparatus. It is a perspective view which shows the structural example of an antenna part. It is a perspective view which shows the structural example of an antenna part. It is an external appearance perspective view which shows an example of the attaching part of antenna components. It is a flowchart which shows an example of the assembly procedure of a receiving antenna. It is a block diagram showing an example of composition of a power receiving antenna concerning one embodiment.

As shown in FIG. 1, a power receiving antenna 1 according to an embodiment includes an antenna unit 10. The antenna unit 10 further includes a first component 20 and a second component 30 detachable from the first component 20. The second part 30 can be attached to the first part 20 or removed from the first part 20. The antenna unit 10 can function as an antenna with only the first component 20, and can also function as an antenna as a whole combining the first component 20 and the second component 30. The first part 20 and the second part 30 are also referred to as antenna parts. Each of the first component 20 and the second component 30 can be said to constitute at least a part of the antenna unit 10.

The power receiving antenna 1 may further include an output unit 50. The antenna unit 10 may be electrically connected to the output unit 50 and may output the received radio wave to the output unit 50. The output unit 50 may convert radio waves input from the antenna unit 10 into DC power. The output unit 50 may include a rectifier circuit. The power receiving antenna 1 may be electrically connected to the power receiving device 60 via the output unit 50. The power receiving antenna 1 may supply power to the power receiving device 60 via the output unit 50. That is, the power receiving antenna 1 can receive radio wave power from the antenna unit 10 and can supply power to the power receiving device 60.

As shown in FIG. 2, the power receiving antenna 1 may include a housing 40 for storing the first component 20 and the second component 30. The housing 40 may have a longitudinal direction. In FIG. 2, the longitudinal direction of the housing 40 is along the X-axis direction. The output unit 50 of the power receiving antenna 1 may include the positive electrode 51 and the negative electrode 52. The positive electrode 51 and the negative electrode 52 may be located at both ends of the housing 40 in the longitudinal direction. The positive electrode 51 and the negative electrode 52 may correspond to the electrodes of the battery used in the power receiving device 60.

As shown in FIG. 3, the power transmission system 100 may include power receiving devices 60 a and 60 b and a power transmission device 300. The power receiving devices 60 a and 60 b are collectively referred to as the power receiving device 60. The power transmission device 300 converts the power supplied from the power system or the battery into radio waves for radio wave feeding, and outputs the radio waves to the power receiving device 60. The power transmission device 300 may include an antenna and an oscillator. The power reception device 60 can receive radio wave power feeding from the power transmission device 300 by receiving radio waves from the power transmission device 300. When the power receiving antenna 1 is connected to each power receiving device 60, the power receiving antenna 1 may have directivity such that it can efficiently receive radio waves from the direction in which the power transmission device 300 is located.

The power receiving device 60 may be, for example, a clock, a remote control, or a terminal device. The power receiving device 60 may be a device driven by a battery. The battery may be, for example, a dry cell having various shapes such as a cylindrical shape, a prismatic shape, or a disk shape. The battery may correspond to a diameter defined by a predetermined standard. The predetermined standard may be, for example, IEC 60086 or JISC 8500. The housing 40 of the power receiving antenna 1 may have the same or similar shape as the battery used in the power receiving device 60. The power receiving antenna 1 may be configured to replace the battery. By replacing the battery with the power receiving antenna 1, the power receiving device 60 may not be separately provided with a configuration for holding the power receiving antenna 1. As a result, the power receiving antenna 1 can be easily incorporated into the power receiving device 60.

As shown in FIGS. 4 and 5, the first component 20 includes a waveguide 21 for receiving radio waves. The waveguide 21 may contain a metal such as copper, or may contain a nonmetallic conductive material such as carbon. The waveguide 21 may include a wire of various shapes such as a straight line or a curved line or an annular shape. As illustrated in FIG. 4 and FIG. 5, the waveguide 21 is composed of a straight part 21a composed of straight conducting wires and a curvilinear part 21b composed of curvilinear conducting wires or an annular conducting wire And at least one of the ring portions 21c. The waveguide 21 is not limited to a conducting wire, and may include a plate-like surface such as a flat surface or a curved surface, or conductors having various shapes such as a three-dimensional shape. Although the annular part 21c illustrated in FIG.4 and FIG.5 is parting by the side of the negative direction of Z-axis, you may divide | segment in another part and may carry out 1 round without dividing | segmenting.

The first component 20 may further include a waveguide holder 22 that holds the waveguide 21. Although the shape of the waveguide holding part 22 is represented by a cylinder in FIG.4 and FIG.5, it is not restricted to this and may be another shape. The waveguide holder 22 may include a dielectric. The first component 20 may be, for example, a monopole antenna or a dipole antenna, or a loop antenna. The first component 20 may further include a feeding portion 23 electrically connected to the waveguide 21. The antenna unit 10 may be electrically connected to the output unit 50 via the feeding unit 23, and may output the power obtained by receiving the radio wave by the first component 20 to the output unit 50.

The second component 30 may have a conductor pattern or a dielectric pattern that changes the directivity of the entire antenna unit 10 when attached to the first component 20. The conductor pattern may contain metal or non-metal conductive material. The conductor pattern may include conductors of various shapes, such as straight or curved or annular. The conductor pattern is not limited to the conducting wire, but may include a conductor having various shapes such as a plate shape such as a flat surface or a curved surface, or a three-dimensional shape. The dielectric pattern may include various dielectrics such as resin or ceramic. The dielectric pattern may be linear, planar or three-dimensional.

When the second part 30 is attached to the first part 20, the antenna unit 10 as a whole may function as an antenna. The directivity characteristic of the antenna unit 10 as a whole can be determined by a combination of the waveguide 21 of the first component 20 and the conductor pattern or dielectric pattern of the second component 30. The directivity characteristic of the antenna represents the distribution of reception sensitivity to radio waves incident on the antenna from each direction. When the reception sensitivity to radio waves incident from each direction with respect to the antenna is substantially uniform or within a predetermined range, the directivity characteristic of the antenna is also referred to as nondirectional. In other words, the antenna is said to have omnidirectionality. When the reception sensitivity for radio waves incident from one direction to the antenna is larger than the reception sensitivity for radio waves incident from another direction by a predetermined value or more, the directivity characteristic of the antenna is also referred to as directivity. In other words, the antenna is said to have directivity.

The first part 20 can receive radio waves regardless of whether the second part 30 is attached. That is, the first part 20 can function as an antenna regardless of whether the second part 30 is attached. In the case where the first component 20 functions as an antenna, the directivity characteristic of the first component 20 can be determined by the shape of the conductor pattern. The first component 20 may be omnidirectional or directional.

By attaching and detaching the second component 30 to and from the first component 20, the directivity characteristic of the entire antenna unit 10 can be changed. When the directivity characteristic of the first component 20 is close to no directivity, as in the case of a dipole antenna, for example, the directivity of the entire antenna unit 10 can be enhanced by attaching the second component 30 to the first component 20. When the directivity characteristic of the first component 20 is directivity, for example, as in a loop antenna, the directivity of the entire antenna unit 10 is enhanced or weakened by attaching the second component 30 to the first component 20. sell.

The second part 30 may be removably attached to the first part 20 by, for example, a surface fastener. The second part 30 may be removably attached to the first part 20, for example by screwing. The second part 30 may be removably attached to the first part 20 by a method utilizing friction or adhesion. The second part 30 is not limited to these examples, and may be removably attached to the first part 20 in various ways. The second part 30 can be easily replaced by being removably attached to the first part 20. By easily replacing the second part 30, the directivity characteristic of the entire antenna unit 10 can be easily adjusted. The directivity characteristic of the antenna unit 10 may be adjusted to enhance directivity based on the positional relationship with the power transmission device 300 or may be adjusted to enhance non-directivity. By adjusting the directivity of the antenna unit 10, the power reception efficiency of the power receiving antenna 1 can be enhanced.

The second part 30 may be larger than the first part 20 as viewed in the Z-axis direction, as illustrated in FIGS. 4 and 5. The second part 30 may be planar as illustrated in FIG. The second part 30 may be configured in a curved shape as illustrated in FIG. 5. The second component 30 may reflect the radio wave traveling from the positive direction of the Z axis to the negative direction toward the first component 20. By doing this, the antenna unit 10 can receive radio waves in a wider range as a whole. As a result, the power reception efficiency of the power receiving antenna 1 can be enhanced. The size or shape of the second part 30 is not limited to the aspect illustrated in FIGS. 4 and 5.

The conductor pattern or dielectric pattern of the second part 30 may be deformable. The second part 30 may be, for example, a film. The second part 30 may be movable relative to the first part 20 in a state of being attached to the first part 20. By doing this, the directivity characteristic of the entire antenna unit 10 can be easily adjusted. As a result, the power reception efficiency of the power receiving antenna 1 can be enhanced.

As shown in FIG. 6, the first part 20 may include an attachment 24 to which the second part 30 can be attached. The second part 30 may comprise an attachment 31. The attachment portion 24 and the attachment portion 31 may be configured to correspond to each other. As illustrated in FIG. 6, the attachment portion 24 may be a recess such as a notch. The mounting portion 31 may be a convex portion that can be fitted to the concave portion. The shapes of the mounting portions 24 and 31 are not limited to the example of FIG. 6 and may be various shapes. The first part 20 and the second part 30 may be positioned apart from each other by being attached via at least one of the attachment parts 24 and 31. By providing the attachment portion 24 or 31, the positional relationship between the first component 20 and the second component 30 can be easily determined. The positional relationship between the first part 20 and the second part 30 may be expressed by the coordinates of each of the X axis, the Y axis and the Z axis, or by a rotation angle with each of the X axis, the Y axis and the Z axis as a rotation axis. May be represented.

The first part 20 and the second part 30 may be fixed in a predetermined mode. The predetermined mode may include a first mode and a second mode. The first mode represents a state in which the adjustment of the position of the second part 30 with respect to the first part 20 is facilitated. In the first mode, the second part 30 may be configured not to move relative to the first part 20 when a force less than a first predetermined value is applied. The second mode represents a state in which the first component 20 and the second component 30 are more firmly fixed than the first mode. In the second mode, the second part 30 may be configured not to move relative to the first part 20 when a force smaller than the second predetermined value, which is larger than the first predetermined value, is applied.

In one embodiment, when the power receiving antenna 1 is assembled, the directivity of the entire antenna unit 10 can be adjusted by adjusting the position of the second component 30. The power receiving antenna 1 may be assembled by an assembling method including the procedure shown in the flowchart of FIG. 7, for example.

The first part 20 is installed (step S1). The first component 20 may be installed inside the power receiving device 60. When the first component 20 is installed in the power receiving device 60, the power receiving antenna 1 can be assembled in a state installed in the power receiving device 60.

The second part 30 is fixed to the first part 20 in the first mode (step S2).

The positions of the first part 20 and the second part 30 are adjusted (step S3). The position of each of the first component 20 and the second component 30 may be adjusted such that the amount of received power of the power receiving antenna 1 approaches the maximum value. The position of each of the first component 20 and the second component 30 may be adjusted such that the power receiving antenna 1 has directivity so that the radio wave transmitted from the power transmitting antenna can be efficiently received. When the second part 30 is fixed to the first part 20 in the first mode, the positions of the first part 20 and the second part 30 can be easily adjusted. As a result, the power reception amount of the power receiving antenna 1 can be easily adjusted.

After the positions of the first part 20 and the second part 30 are adjusted, the second part 30 is fixed to the first part 20 in the second mode (step S4). In other words, the second component 30 is fixed to the first component 20 in the second mode in a state where the adjustment of the amount of received power of the power receiving antenna 1 is completed. When the second part 30 is fixed to the first part 20 in the second mode, the second part 30 is less likely to move relative to the first part 20. As a result, the state in which the received power amount of the power receiving antenna 1 is adjusted is easily maintained. After step S4, the procedure of the flowchart of FIG. 7 ends.

In the power receiving antenna 1 according to an embodiment, the adjustment of the amount of received power in the first mode may not be performed. That is, steps S2 and S3 may not be performed, and step S4 may be performed after step S1.

The power receiving antenna 1 according to an embodiment may be installed inside the power receiving device 60 after being assembled. That is, step S1 may be performed after step S2. Also, in one embodiment, step S1 may be performed after step S4.

The power receiving antenna 1 according to an embodiment may be installed at a location distant from the power receiving device 60.

The power receiving antenna 1 according to an embodiment may be installed outside the power receiving device 60.

As shown in FIG. 8, in the power receiving antenna 1 according to the embodiment, the antenna unit 10 may further include a third component 70 that is removable from at least one of the first component 20 and the second component 30. By further attaching the third component 70 to the power receiving antenna 1 having the first component 20 and the second component 30, the directivity characteristic of the entire antenna unit 10 may be adjusted. The third component 70 may have a conductor pattern or a dielectric pattern that changes the directivity characteristic of the antenna unit 10 as a whole. The third part 70 may have the same shape as the second part 30 or may have a different shape. The third part 70 may be fixed to the first part 20 or may be fixed to the second part 30. When the antenna unit 10 further includes the third component 70, the directivity characteristic of the entire antenna unit 10 can be easily adjusted.

Although the embodiments according to the present disclosure have been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various changes or modifications based on the present disclosure. Therefore, it should be noted that these variations or modifications are included in the scope of the present disclosure. For example, functions or the like included in each component or each step can be rearranged so as not to be logically contradictory, and a plurality of components or steps can be combined or divided into one. It is. Although the embodiment according to the present disclosure has been described focusing on the apparatus, the embodiment according to the present disclosure can also be realized as a method including steps performed by each component of the apparatus. Embodiments according to the present disclosure can also be realized as a method, a program, or a storage medium storing a program, which is executed by a processor included in the device. It should be understood that these are also included in the scope of the present disclosure.

In the present disclosure, the descriptions such as “first” and “second” are identifiers for distinguishing the configurations. The configurations distinguished in the description of “first”, “second” and the like in the present disclosure can exchange the numbers in the configurations. For example, the first part can exchange the second part with the identifiers "first" and "second". The exchange of identifiers takes place simultaneously. The configuration is also distinguished after the exchange of identifiers. Identifiers may be deleted. The configuration from which the identifier is deleted is distinguished by a code. The interpretation of the order of the configuration and the basis for the existence of the small-numbered identifiers should not be used based on only the descriptions of the "first" and "second" identifiers etc. in the present disclosure.

In the present disclosure, the X-axis, the Y-axis, and the Z-axis are provided for convenience of description and may be interchanged with each other. The configuration according to the present disclosure has been described using an orthogonal coordinate system configured by the X axis, the Y axis, and the Z axis. The positional relationship of each configuration according to the present disclosure is not limited to the orthogonal relationship.

DESCRIPTION OF SYMBOLS 1 Receiving antenna 10 Antenna part 20 1st component 21 Waveguide 22 Waveguide holding part 23 Feeding part 24 Mounting part 30 2nd part 31 Mounting part 40 Casing 50 Output part 51 Positive electrode 52 Negative electrode 60 (60a, 60b) Power reception Device 70 third part 100 power transmission system 300 power transmission device

Claims (13)

1. An antenna unit having a first part and a second part detachable from the first part,
   A power receiving antenna which receives radio wave feeding at the antenna unit.
2. The power receiving antenna according to claim 1, wherein directivity of the antenna unit is changed by attaching and detaching the second component.
3. The power receiving antenna according to claim 1, wherein the directivity of the antenna unit is enhanced by attaching the second component.
4. The power receiving antenna according to claim 1, wherein the directivity of the antenna unit is weakened by attaching the second part.
5. The power receiving antenna according to any one of claims 1 to 4, wherein the first part has an attachment portion to which the second part can be attached.
6. The first part and the second part are
   When the amount of received power of the antenna unit is adjusted, it is fixed in the first mode,
   The power receiving antenna according to any one of claims 1 to 5, wherein the power receiving antenna according to any one of claims 1 to 5, wherein the power receiving amount is fixed in a second mode stronger than the first mode.
7. It further comprises an output part having a positive electrode and a negative electrode, and a case having a longitudinal direction,
   The power receiving antenna according to any one of claims 1 to 6, wherein the positive electrode and the negative electrode are respectively located at both ends in the longitudinal direction of the housing.
8. The power receiving antenna according to any one of claims 1 to 7, wherein the antenna unit further includes a third component attachable to and detachable from at least one of the first component and the second component.
9. It is connected to the antenna unit that receives radio wave feed,
   A power receiving device, wherein a part of the antenna unit is configured to be removable.
10. An antenna component that is part of a power receiving antenna that receives radio wave power supply and that is configured to be detachable from the power receiving antenna.
11. A method of assembling a power receiving antenna, comprising combining a first part constituting at least a part of an antenna unit receiving radio wave power and a second part detachable from the first part.
12. The method of assembling a power receiving antenna according to claim 11, wherein the second part is attached and detached to change the directivity of the antenna unit.
13. Adjusting the received power amount of the antenna unit in a state in which the first part and the second part are fixed in the first mode;
    13. The power receiving antenna according to claim 11, wherein the first component and the second component are fixed in a second mode stronger than the first mode in a state in which the adjustment of the power reception amount of the antenna unit is completed. Assembly method.

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