Power transmission structure for road

Abstract

To provide a power transmission structure of a road that eliminates the need for wiring work on the road when power is transmitted from a power supply to a load via the road.SOLUTION: When a paved surface 17 of a road is formed by a two layer structure of a precast road slab 16 and a precast floor slab 14, a power transmission unit 30 incorporating a power transmission coil 31 for generating magnetic flux vertically upward when electric power is supplied from a power source 2 is arranged in a joining part 143 between the precast floor slabs 14. A precast road board 16 arranged on a power transmission unit 30 incorporates a power receiving coil 161 for generating electromotive force by magnetic flux generated by a power transmission coil 31, and supplies power received by the power receiving coil 161 to a load 163 by using wireless power feeding.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a power transmission structure for roads, and more particularly to a power transmission structure for roads with a two-layer pavement surface. [Background technology]

[0002] It has been common practice to use electricity to make road markings, etc. For example, Patent Document 1 proposes a technology for supplying electricity to light-emitting markings buried in the road surface, in which paving blocks (solar panel blocks) equipped with solar panels and power storage devices are connected by wiring cords to paving blocks (light-emitting display blocks) equipped with LEDs, and the LEDs are illuminated by electricity stored in the power storage devices from the solar panels to make road markings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-108052 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-270443 [Patent Document 3] Japanese Patent Application Publication No. 10-176304 [Patent Document 4] International Publication No. 2014 / 147857 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the past, it was necessary to wire a paving block equipped with a power source such as a solar panel to a paving block equipped with a load such as an LED using a power line called a wiring cord. In other words, even when the power source and load on the road were not located on the road, the power transmission structure on the road in the past transmitted power using a wired power line located between the power source and the load, which required wiring work.

[0005] An object of the present invention is to provide a road power transmission structure that eliminates the need for wiring work on the road when transmitting power from a power source to a load via the road. [Means for solving the problem]

[0006] The road power transmission structure of the present invention is a two-layer structure consisting of an upper layer that forms the road surface and a lower layer, wherein the lower layer comprises a connection means that electrically connects a power source and a power transmission means that transmits power from the power source using wireless power supply, and the upper layer comprises a power receiving means that is arranged opposite the power transmission means and receives power transmitted from the power transmission means, and power transmission from the power source to a load arranged on or near the upper layer is performed using wireless power transmission and reception between the power transmission means and the power receiving means.

[0007] Furthermore, when the lower layer is formed by arranging multiple flat precast deck slabs side by side, the power transmission unit is disposed at the joint between adjacent precast deck slabs to form part of the lower layer and is characterized by having a power transmission unit that incorporates the power transmission means.

[0008] Furthermore, when the upper layer is formed by arranging multiple flat precast road slabs, the precast road slab arranged in a position opposite the power transmission means is characterized in that the power receiving means is built into the precast road slab.

[0009] The power transmitting means is characterized in that it has a power transmitting coil that generates magnetic flux vertically upward when power is supplied from the power source, and the power receiving means has a power receiving coil that generates electromotive force due to the magnetic flux generated by the power transmitting coil.

[0010] The power supply device is also characterized by including a positional deviation prevention member that is inserted into and passes through a concentric hole formed by the power transmission coil and the power receiving coil.

[0011] Furthermore, the precast road slab having the built-in power receiving means is provided with an inter-road slab power transmission means on at least one side of the precast road slab that transmits the power received by the power receiving means using wireless power supply, and the precast road slab not having the built-in power receiving means is provided with an inter-road slab power receiving means on the side facing the precast road slab that is adjacent to the precast road slab that has the inter-road slab power transmission means when laid on the road, that receives power from the inter-road slab power transmission means, and the load to which the power received by the inter-road slab power receiving means is supplied. [Effects of the Invention]

[0012] According to the inventions set forth in claims 1 to 4, when transmitting power from a power source to a load via a road, it is possible to provide a power transmission structure for a road that does not require wiring work on the road.

[0013] According to the invention of claim 5, it is possible to align the power transmission coil and the power reception coil and prevent misalignment after installation.

[0014] According to the invention as set forth in claim 6, it is possible to supply power to a precast road slab that cannot directly receive power from a power transmission means. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic perspective view showing a state in which a part of a road structure to which a power transmission structure in a first embodiment is applied is removed. [Figure 2] FIG. 2 is a perspective view showing the main parts of the structure of the precast floor slab of the first embodiment. [Figure 3] FIG. 3 is a diagram showing a procedure for constructing a pavement surface in the first embodiment. [Figure 4] FIG. 4 is a diagram showing the procedure for constructing a pavement surface in the first embodiment, and is a diagram following FIG. [Figure 5] FIG. 5 is a diagram showing the procedure for constructing a pavement surface in the first embodiment, and is a diagram following FIG. 4. [Figure 6]FIG. 6 is a diagram showing the procedure for constructing a pavement surface in the first embodiment, and is a diagram following FIG. 5. [Figure 7] 1 is a side cross-sectional view of a paved surface of a road in the first embodiment. [Figure 8] FIG. 11 is a plan view showing an example of the positions of loads provided on a road in the second embodiment, as viewed from above. [Figure 9] FIG. 10 is a plan view showing another example of the position of a load provided on a road in the second embodiment, as viewed from above. [Figure 10] FIG. 11 is a side cross-sectional view of a paved surface of a road in a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0017] Embodiment 1 FIG. 1 is a schematic perspective view showing a road to which a power transmission structure according to this embodiment is applied, with a portion removed. The road 10 shown in FIG. 1 extends from the upper left to the lower right of the drawing. The road 10 has steel sheet piles 12 erected on both sides to cover the sides of the ground 11 that are exposed by excavating the ground 11, and a base concrete slab is poured between them to form a roadbed 13. Furthermore, multiple precast deck slabs 14 are installed side by side on the ground 11 and the steel sheet piles 12 on both sides of the road 10, and deck waterproofing materials 15 and multiple precast road slabs 16 are layered on top of them to form a paved surface 17 of the road 10. In this embodiment, the paved surface 17 of the road 10 has a two-layer structure consisting of the precast road slab 16, which forms the upper layer that forms the road surface, and the precast deck slab 14, which forms the lower layer.

[0018] Incidentally, a "precast concrete (PCa) panel" is a plate-shaped concrete that is pre-manufactured in a shape and size that can be transported from a factory or other facility for assembly and installation on site. The precast floor slab 14 and the precast road slab 16 fall under this category of PCa panels.

[0019] The slab waterproofing material 15 is a material used to waterproof the precast slab 14, and is therefore not treated as a layer that forms the pavement surface 17. Furthermore, the slab waterproofing material 15 is not a characteristic component of this embodiment, and is therefore omitted from the following explanation and drawings. A space 18 is formed between the roadbed 13 and the pavement surface 17 supported by the steel sheet piles 12.

[0020] FIG. 2 is a perspective view showing the main structure of a precast deck 14 according to this embodiment. In this embodiment, the lower layer of the road 10 is formed by arranging precast decks 14 using a joining method known as Slim Fastener (registered trademark). As shown in FIG. 1, the precast deck 14 according to this embodiment has a flat plate shape with a rectangular surface and is formed long enough to be installed on top of a steel sheet pile 12. A protrusion 141, known as a multi-shear key in Slim Fastener, is formed on the side of the precast deck 14. Reinforcing bars 142 extend from the protrusion 141 toward adjacent precast decks 14 without abutting each other. The gaps between adjacent precast decks 14 are generally called joints, but because these gaps are filled with joining materials such as grout or fiber-reinforced concrete, they are referred to as "joints 143" in this embodiment.

[0021] The precast road slab 16 has a flat plate shape with a square surface as shown in Figure 1, and the road surface is formed by arranging multiple precast road slabs 16 vertically and horizontally on the precast floor slab 14.

[0022] Figures 3 to 6 are diagrams showing the construction procedure for forming the pavement surface 17 of the road 10 of this embodiment. Of these, Figure 6 is a schematic perspective view showing the completed pavement surface 17, while Figure 7 is a side cross-sectional view showing the vicinity of the joint 143 of the precast deck 14 when the pavement surface 17 shown in Figure 6 is cut along line AA'. The power transmission structure of the road 10 of this embodiment will be described below using Figures 3 to 7, especially Figure 7. Note that the joint 143 is filled with a joint member, but this is omitted in Figure 7. As mentioned above, the deck waterproofing material 15 is also omitted.

[0023] Although not shown in Fig. 1, an AC power supply 2 is installed in the space 18. A power line 3 extending from the power supply 2 has a connector 4 attached to the end thereof.

[0024] In this embodiment, a power transmission unit 30 incorporating a power transmission coil 31 is disposed at a joint 143 of a precast deck 14. The power transmission unit 30 has a flat plate shape with a rectangular surface, and by being disposed at the joint 143, it forms part of the lower layer. The main body of the power transmission unit 30 is formed from concrete, plastic, or the like. In this embodiment, the power transmission unit 30 is placed on the top protrusion 141 of the precast deck 14 so that it is at the same height as the upper surfaces of the multiple precast decks 14. Until it is fixed, the power transmission unit 30 can be moved in the longitudinal direction of the joint 143, in other words, in the road width direction, as shown by arrow A in Figure 3, so that it can be positioned at a desired location in the road width direction. A notch is provided on the bottom surface of the power transmission unit 30 to match the outline of the protrusion 141 so that it can be easily moved along the joint 143.

[0025] Although the bonding material filled into the bonding portion 143 is omitted in FIG. 7, a blocking plate 144 is provided to block the lower portion of the bonding portion 143 so that the filled bonding material does not flow down from the bonding portion 143.

[0026] The power transmission unit 30 includes a connection means for electrically connecting to the power source 2, and a power transmission coil 31. The connection means in this embodiment includes a power line 32 and a connector 33 attached to the tip of the power line 32 and connected to the connector 4. Power is supplied to the power transmission coil 31 from the power source 2 via the power line 32. The power line 32 extending from the main body of the power transmission unit 30 to the outside may be protected by a plastic protective tube or the like. In this embodiment, the connection means with the power source 2 is provided in the form shown in the drawing, but it may be realized in a form suitable for the arrangement of the power source 2, etc.

[0027] The power transmission coil 31 is disposed close to the top surface of the power transmission unit 30, at a position where the centers of the power transmission coil 31 and the power transmission unit 30 are aligned. A hole penetrating the center of the power transmission unit 30 is provided in the center of the power transmission coil 31. The power transmission coil 31 is provided as a power transmission means that transmits power from the power source 2 using wireless power feeding. Specifically, when power is supplied from the power source 2, the power transmission coil 31 generates a magnetic flux vertically upward.

[0028] In this embodiment, the power from the power source 2 is illustrated as being constantly supplied to the power transmission coil 31 via the power lines 3 and 32, but a control means for controlling the power supply to the power transmission coil 31 may be provided between the power transmission coil 31 and the connector 33.

[0029] Of the precast road slabs 16, those that are not positioned opposite the power transmission unit 30 are formed as simple concrete slabs. Of the precast road slabs 16, those that are positioned opposite the power transmission unit 30 incorporate a power receiving coil 161, a conversion circuit 162, and a load 163. The power receiving coil 161 is provided as a power receiving means that receives power transmitted from the power transmission coil 31. Specifically, the power receiving coil 161 generates an electromotive force due to the magnetic flux generated by the power transmission coil 31.

[0030] The power receiving coil 161 is disposed close to the bottom surface of the precast road slab 16, at a position where the centers of the power receiving coil 161 and the precast road slab 16 are aligned. A hole 165 is provided in the center of the precast road slab 16, passing through the center of the power receiving coil 161. This hole 165 is concentric with the hole provided in the center of the power transmission unit 30. Note that in Figure 1, the cover 167 that covers the hole 165 provided in the precast road slab 16 is not shown.

[0031] The conversion circuit 162 is a circuit that is provided on the power line 164 between the power receiving coil 161 and the load 163, and converts the current from AC to DC. The load 163 is an electrical component that is incorporated into the precast road slab 16, and is, for example, a light-emitting device such as an LED. Since it is assumed that the load 163 uses a DC power source, the conversion circuit 162 is provided between the power receiving coil 161 and the load 163. If the load 163 uses an AC power source, the conversion circuit 162 is not necessary.

[0032] Incidentally, "wireless power supply" can be defined as a technology for transmitting power without using electric wires. There are various types of wireless power supply, such as electromagnetic induction, electric field coupling, and electromagnetic wave. In this embodiment, it is assumed that an electromagnetic induction method, not a magnetic field resonance method, is used for wireless power transmission and reception between the power transmitting means and the power receiving means, and the power transmitting means and the power receiving means are formed by coils.

[0033] In this embodiment, the mechanism for transmitting and receiving power using wireless power supply can be realized by, for example, the same mechanism as that described in a patent application filed by the same applicant as the present application (Patent Application No. 2022-201812). Therefore, a detailed description of the mechanism for transmitting and receiving power using wireless power supply between the power transmitting coil 31 and the power receiving coil 161 will be omitted.

[0034] Incidentally, when using electromagnetic induction for wireless power transfer, the power transmitting means and power receiving means are formed by coils as described above. To improve the power transmission efficiency between the power transmitting coil 31 and the power receiving coil 161, it is preferable to position them as close as possible to each other. A concentric hole 165 is formed in the center of the power transmitting coil 31 and the power receiving coil 161, and a pin 166 is inserted through this hole 165. The pin 166 functions as a member to prevent the power transmitting coil 31 and the power receiving coil 161 from shifting in position. The pin 166 must be strong enough to withstand the force of a heavy vehicle traveling on it. However, in addition to being strong, it is preferable to use a material with a relative permeability of 1 or more. For example, it is preferable to use a ferromagnetic material such as silicon steel or electromagnetic stainless steel with a relative permeability of 1,000 or more for the pin 166.

[0035] If the top of the pin 166 is lower than the upper surface of the precast road slab 16, causing a step, a lid 167 is required to close the hole 165 in order to eliminate this step. In this embodiment, the lid 167 is formed by filling it with grout.

[0036] Next, the construction procedure for the pavement surface 17 in this embodiment will be described.

[0037] As shown in Figure 3, the power transmission unit 30 is placed at a predetermined position on the joint 143. The power receiving coil 161 of the precast road slab 16 must be placed directly above the power transmission coil 31 of the power transmission unit 30, facing it, and the load 163 provided on the precast road slab 16 must be placed at a predetermined position. Therefore, the "predetermined position" for placing the power transmission unit 30 must take into consideration the positions of the power receiving coil 161 of the precast road slab 16 and the load 163. Therefore, workers install the power transmission unit 30 at the joint 143, taking into account the position of the precast road slab 16. As mentioned above, the installation position of the power transmission unit 30 can be adjusted in the direction of arrow A along the joint 143.

[0038] Once the position of the power transmission unit 30 has been determined, as shown in Figure 4, connecting members 5 are filled into the joints 143 to connect the precast decks 14 and secure the power transmission unit 30. At this time, by fixing a blocking plate 144 to the bottom surface of the adjacent precast decks 14 before filling with the connecting members 5, the connecting members 5 can be prevented from flowing down into the underground space 18.

[0039] Furthermore, since the power lines 32 and connectors 33 need to be drawn out to the space 18, for example, holes are provided in the closing plate 144, and the holes in the closing plate 144 are closed after the power lines 32 and connectors 33 have been drawn out.

[0040] After the joint members 5 have hardened and the power transmission unit 30 has been fixed, the precast road slab 16 is placed on top of the power transmission unit 30, as shown in FIG. 5. Then, a pin 166 is inserted into a hole 165 in the precast road slab 16 to align the precast road slab 16 with the power transmission unit 30. The pin 166 fits into the center hole of the power transmission coil 31 of the power transmission unit 30, thereby correcting the misalignment between the precast road slab 16 and the power transmission unit 30 and thereby realizing an opposing arrangement between the power transmission coil 31 and the power receiving coil 161. Note that the pin 166 abuts against the hardened joint members 5, preventing it from slipping through the hole 165 and falling into the space 18.

[0041] As mentioned above, the pin 166 is formed using a material that combines structural strength and high magnetic permeability, so that the magnetic flux from the transmitting coil 31 efficiently penetrates the receiving coil 161, generating current, and power can be supplied to the load 163 on the precast road slab 16 using wireless power supply.

[0042] Then, as shown in FIG. 6, after the pins 166 are fitted into the holes 165, the holes 165 are filled with grout or the like to close the holes 165, thereby making the top surface of the precast road slab 16 flat.

[0043] In this manner, the precast road slab 16 is laid on the precast floor slab 14. If the width of the road 10 makes it impossible to lay the square precast road slab 16 in its original shape, the precast road slab 16 may be partially scraped or cut as necessary.

[0044] According to this embodiment, power can be transmitted from the power source 2 to the load 163 by utilizing wireless power transmission and reception between the power transmitting coil 31 and the power receiving coil 161. In this manner, in this embodiment, since wireless power supply is utilized, wiring work is not required when constructing or replacing the precast deck 14 and the precast road slab 16.

[0045] As described above, the precast road slab 16 has been described as having a built-in power receiving coil 161 and one load 163. However, the precast road slab 16 may be provided with multiple loads 163. In this case, the power receiving coil 161 and the loads 163 are connected in parallel with each other via power lines inside the precast road slab 16, and the power received by the power receiving coil 161 is supplied to each load 163. Furthermore, if the load 163 is a light-emitting element, a road marking can be formed by combining multiple light-emitting elements.

[0046] Embodiment 2 FIG. 8 is a plan view of an example of the positions of multiple loads 163 on a road 10 equipped with the loads 163, as viewed from above. As shown in FIG. 1, the precast decks 14 are arranged in a direction perpendicular to the width of the road 10, in other words, in the direction of vehicle travel. However, in FIG. 8, some of the precast decks 16 are removed to make it easier to understand the positional relationship between the joints 143 and the power transmission units 30. On the other hand, the precast decks 16 that have not been removed are shown in grayscale for convenience. Note that the power line 3 is shown as a single line for convenience. The same applies to FIG. 9, which will be described below.

[0047] 8 shows an example in which a plurality of power transmission units 30 are arranged in a direction along the joint 143. In this case, the precast road slabs 16 equipped with the loads 163 are arranged along the joint 143, and therefore the power transmission units 30 to be placed opposite the precast road slabs 16 can all be arranged at the joint 143. In this case, power from the power source 2 can be supplied individually to each of the plurality of power transmission units 30.

[0048] Figure 9 is a diagram showing another example of the positions of multiple loads 163 in a road 10 equipped with multiple loads 163, as viewed from above. Also, Figure 10 is a side cross-sectional view showing the vicinity of joint 143 of precast deck 14 when the pavement surface 17 of road 10 shown in Figure 9 is cut along line BB'. Note that the cut line (dotted line) is slightly offset from the center of the component in some parts so as not to overlap with the lines indicating the component.

[0049] 9 and 10 show an example of a precast road slab 260 that includes a load 163 but is located at a position where there is no joint 143 below. In this case, the precast road slab 260 cannot directly receive power from the power source 2 via the power transmission unit 30. Therefore, the precast road slab 260 does not need to incorporate a power receiving coil 161 for receiving power from the power transmission unit 30. However, in this embodiment, even in such a case, it is necessary to supply power to the load 163 of the precast road slab 260 using wireless power supply. Therefore, this embodiment provides a structure that allows power to be supplied to a precast road slab 260 located at a position where there is no joint 143. Note that components similar to those of the precast road slab 16 shown in embodiment 1 are designated by the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0050] In this embodiment, the precast road slab 60 disposed directly above the power transmission unit 30 has, in addition to the configuration of the precast road slab 16 described above, a power transmission coil 61 on at least one side as inter-road slab power transmission means that transmits power received by the power receiving coil 161 using wireless power supply. In this embodiment, power is supplied to the precast road slabs 260 disposed on the left and right of the drawing, so the precast road slab 60 has a power transmission coil 61 on the side facing each of the precast road slabs 260 on the left and right of the drawing. Each power transmission coil 61 is connected to the power receiving coil 161 in parallel with the conversion circuit 162 by a power line 62.

[0051] Meanwhile, a power receiving coil 261 is disposed on the precast road slab 260 at a position facing the power transmitting coil 61 on a side of the precast road slab 260 facing the precast road slab 60. The power receiving coil 261 is provided as inter-road slab power receiving means that receives power from the power transmitting coil 61. The relationship between the power transmitting coil 61 and the power receiving coil 261 is similar to the relationship between the power transmitting coil 31 and the power receiving coil 161, and power is supplied to a load 163 provided on the precast road slab 260 using wireless power transmission and reception between the power transmitting coil 61 and the power receiving coil 261. Note that, similar to the precast road slab 16, a conversion circuit 162 (not shown in FIG. 9 ) is provided in the power line 262 between the load 163 and the power receiving coil 261 in the precast road slab 260.

[0052] As described above, according to this embodiment, power can be supplied to a precast road slab 260 that does not have a built-in power receiving coil 161 because it does not correspond to the position of the joint 143 where the power transmission unit 30 is arranged, thereby making it possible to supply power to a load 163 provided on the precast road slab 260.

[0053] In this embodiment, the precast road slab 260 that does not have a built-in power receiving coil 161 may have a built-in power transmitting coil 61 instead of or in addition to the load 163. If an adjacent precast road slab has a load and has a built-in power receiving coil 261, the built-in power transmitting coil 61 can supply power to the adjacent precast road slab. In other words, by incorporating the power transmitting coil 61, the precast road slab 260 can function as a precast road slab with a relay function that relays power to other precast road slabs. The precast road slab 60 shown in Figures 9 and 10 can be said to have a relay function that relays power to the adjacent precast road slab 260.

[0054] In each of the above embodiments, the pavement surface 17 is formed with a two-layer structure: an upper layer formed by arranging multiple precast road slabs 16 vertically and horizontally, and a lower layer formed by arranging multiple precast deck slabs 14 in a row along the road 10. However, as long as the pair of power receiving coil 161 arranged in the upper layer and the power transmitting coil 31 arranged in the lower layer can be arranged in opposing positions, thereby enabling power from the power source 2 to be supplied to the load 163 using wireless power supply, each layer does not necessarily have to be formed from precast concrete slabs. Furthermore, the surface shape of the precast deck slab 14 does not have to be limited to a rectangle. Furthermore, the surface shape of the precast road slab 16 does not have to be limited to a square, and may be any shape suitable for the installation location of the precast road slab 16.

[0055] Furthermore, in this embodiment, the power source 2 is installed in the space 18 formed under the pavement surface 17, but the installation location of the power source 2 does not have to be limited to within the space 18. The power source 2 may be installed in a space other than the space 18 formed by digging into the ground, for example, under an expressway viaduct or a bridge girder. Furthermore, instead of being installed in the space 18, the power source 2 may be buried on the side of the road, etc.

[0056] Furthermore, the load 163 does not necessarily have to be limited to being disposed on the road surface or an upper layer of the road 10. In this embodiment, the load 163 is formed on the surface of the precast road slab 16, assuming that road markings are formed using one or more loads 163, but the installation location of the load 163 to which power is supplied is not limited to this, and power from the power source 2 may be relayed via the road 10 to a load installed near the road 10.

[0057] [Configuration of the present invention] Configuration 1: In a road power transmission structure that is made up of two layers, an upper layer that forms the road surface and a lower layer, The lower layer is a connection means for electrically connecting to a power source; power transmission means for transmitting power from the power source by using wireless power supply; Equipped with the upper layer is provided with a power receiving means disposed at a position facing the power transmitting means and configured to receive power transmitted from the power transmitting means; A road power transmission structure characterized in that power transmission from the power source to a load arranged on or near the upper layer is performed using wireless power transmission and reception between the power transmission means and the power receiving means. Configuration 2: When the lower layer is formed by arranging a plurality of flat precast deck slabs side by side, the road power transmission structure described in configuration 1 is characterized in that it is provided with a power transmission unit that forms part of the lower layer by being arranged at the joint between adjacent precast deck slabs and that incorporates the power transmission means. Configuration 3: A road power transmission structure as described in configuration 1 or 2, characterized in that when the upper layer is formed by arranging multiple flat precast road slabs, the precast road slab arranged in a position opposite the power transmission means has the power receiving means built in. Configuration 4: the power transmission means has a power transmission coil that generates a magnetic flux vertically upward when power is supplied from the power source, the power receiving means has a power receiving coil that generates an electromotive force by a magnetic flux generated by the power transmitting coil; 4. A power transmission structure for a road according to any one of configurations 1 to 3, characterized in that: Configuration 5: 5. The road power transmission structure according to configuration 4, further comprising a positional deviation prevention member that is inserted so as to pass through a concentric hole formed by the power transmission coil and the power receiving coil. Configuration 6: The precast road slab having the built-in power receiving means is provided with a power transmission means for transmitting the power received by the power receiving means using wireless power supply on at least one side of the precast road slab, The precast road slab without the built-in power receiving means is an inter-road slab power receiving means, which is located adjacent to the precast road slab when laid on the road and faces the inter-road slab power transmission means, and which receives power from the inter-road slab power transmission means; the load to which the power received by the inter-road plate power receiving means is supplied; Equipped with 6. A road power transmission structure according to any one of configurations 3 to 5, characterized in that: [Explanation of symbols]

[0058] 2 Power source, 3,32,62,164,262 Power line, 4,33 Connector, 5 Joint member, 10 Road, 11 Ground, 12 Steel sheet pile, 13 Subgrade, 14 Precast deck, 15 Deck waterproofing material, 16,60,260 Precast deck, 17 Pavement surface, 18 Space, 30 Power transmission unit, 31,61 Power transmission coil, 141 Protrusion, 142 Reinforcing bar, 143 Joint, 144 Closure plate, 161,261 Power receiving coil, 162 Conversion circuit, 163 Load, 165 Hole, 166 Pin, 167 Cover.

Claims

1. In a road power transmission structure that is formed by a two-layer structure consisting of an upper layer that forms the road surface and a lower layer, The lower layer is a connection means for electrically connecting to a power source; power transmission means for transmitting power from the power source by using wireless power supply; Equipped with the upper layer is provided with a power receiving means disposed at a position facing the power transmitting means and configured to receive power transmitted from the power transmitting means; A road power transmission structure characterized in that power transmission from the power source to a load arranged on or near the upper layer is performed using wireless power transmission and reception between the power transmission means and the power receiving means.

2. 2. The road power transmission structure according to claim 1, characterized in that, when the lower layer is formed by arranging a plurality of flat precast deck slabs side by side, a power transmission unit is provided which is disposed at the joint between adjacent precast deck slabs to form part of the lower layer and which incorporates the power transmission means.

3. The road power transmission structure described in claim 1, characterized in that when the upper layer is formed by arranging multiple flat precast road slabs, the precast road slab arranged in a position opposite the power transmission means has the power receiving means built in.

4. the power transmission means has a power transmission coil that generates a magnetic flux vertically upward when power is supplied from the power source, the power receiving means has a power receiving coil that generates an electromotive force by a magnetic flux generated by the power transmitting coil; 2. The road power transmission structure according to claim 1 .

5. 5. The road power transmission structure according to claim 4, further comprising a positional deviation prevention member inserted so as to pass through a concentric hole formed by the power transmission coil and the power receiving coil.

6. The precast road slab having the built-in power receiving means is provided with a power transmission means for transmitting the power received by the power receiving means using wireless power supply on at least one side of the precast road slab, The precast road slab without the built-in power receiving means is an inter-road slab power receiving means, which is located adjacent to the precast road slab when laid on the road and faces the inter-road slab power transmission means, and which receives power from the inter-road slab power transmission means; the load to which the power received by the inter-road plate power receiving means is supplied; Equipped with 4. The road power transmission structure according to claim 3.

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