A UAV box-type contactless power supply system based on a box-embedded passive coil

Abstract

The present invention discloses a box-type contactless power supply system for drones based on a passive coil embedded in a box. The system includes a transmitting-end DC power supply, a high-frequency inverter, a transmitting-end compensation circuit, an energy transmitting coil, a passive coil structure embedded in the box buffer material, a coil compensation capacitor embedded in the box, an energy receiving coil, a receiving-end compensation capacitor, a receiving-end rectifier circuit, and a load. Considering that precision instruments and equipment such as drones are often stored in boxes containing buffer materials during transportation, and that existing charging methods require frequent removal from or placement into the box during power replenishment, the present invention, while solving the problem of contactless power supply for drones without unpacking, further utilizes the space embedded in the box buffer material to embed the passive coil, enhance the magnetic field coupling of the overall energy transceiver, and improve the system's receiving power and efficiency, thus having broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of contactless power transmission, and in particular to a box-type contactless power supply system for unmanned aerial vehicles based on a box-embedded passive coil. Background Art

[0002] After outdoor use, most expensive and sophisticated electrical equipment (such as inspection drones, infrared thermal imagers, electromagnetic radiation meters, handheld spectrometers, and portable multi-parameter water quality analyzers) is typically returned to a dedicated box with cushioning material to prevent damage during transportation. Returning indoors, the equipment is removed from the box for charging. Once fully charged, it is returned to its dedicated storage box for future use. For example, a common quadcopter inspection drone, after removal from its storage box, is typically recharged using a manual, contactless charging method, which is complex. Contactless power transmission, which bypasses traditional wired contact connections and transmits power over the air, offers a new solution to this problem. While contactless power transmission eliminates the need for manual plugging and unplugging of charging cables, it still requires the drone to be removed from its storage box. While current single-transmitter, single-receiver contactless charging methods can, to a certain extent, provide contactless power recharge to a drone placed within the box, the thickness of the box and the impact-resistant cushioning material significantly increases the transmission distance of the contactless power transmission system, significantly impacting overall system performance. The present invention utilizes the buffer material space of a special box for precision electrical equipment such as drones, and proposes a drone box-type contactless power supply system based on an embedded passive coil in the box. While taking into account the contactless power replenishment without opening the box, it is also beneficial to improve the system efficiency. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention proposes a box-type contactless power supply system for unmanned aerial vehicles based on a passive coil embedded in the box. While taking into account the contactless power replenishment without opening the box, it is also beneficial to improve the system efficiency.

[0004] To achieve the above objectives, a UAV box-type contactless power supply system based on a passive coil embedded in the box is first proposed. The designed system includes a transmitting-end DC power supply, a high-frequency inverter, a transmitting-end compensation circuit, an energy transmitting coil, a passive coil structure embedded in the box buffer material, a coil compensation capacitor embedded in the box, an energy receiving coil, a receiving-end compensation capacitor, a receiving-end rectifier circuit, and a load.

[0005] Furthermore, the applicable box is made of non-metallic material and contains buffer material, a passive coil structure is embedded in the box buffer material, a flat spiral coil is embedded in the box bottom buffer material, and a spatial three-dimensional spiral coil is embedded in the box surrounding buffer material.

[0006] Furthermore, the passive coil structure embedded inside the box buffer material is connected in series by a bottom plane rectangular spiral coil and a surrounding space three-dimensional spiral rectangular coil. After the two are connected in series, an overall embedded passive coil structure is formed, and the overall structure is compensated to a resonant state using a series compensation capacitor.

[0007] Furthermore, the energy transmitting coil at the desktop or ground end adopts a planar rectangular spiral structure, and the transmitting coil is connected to the transmitting end high-frequency inverter and the transmitting end compensation circuit; the energy receiving coil at the drone end adopts a spatial three-dimensional spiral rectangular coil structure, and the coil is installed around the drone bracket. The lowest wire turn at the bottom of the spatial three-dimensional receiving coil is 3 cm to 5 cm away from the bottom of the bracket to ensure that the coil is not easily damaged when the drone takes off and lands. The highest wire turn of the spatial three-dimensional receiving coil is 3 cm to 5 cm away from the bottom of the drone fuselage to reduce the interference of the receiving coil on the internal component circuits of the fuselage. The receiving coil is connected to the receiving end compensation circuit and the rectifier circuit.

[0008] Furthermore, the size of the planar spiral transmitting coil does not exceed the size of the bottom of the drone storage box, the length and width of the planar spiral embedded coil of the buffer material at the bottom of the box are smaller than the size of the planar road spiral coil, the length and width of the planar spiral embedded coil at the bottom of the box are the same as the length and width of the three-dimensional spiral receiving coil in the space at the drone end, and the length and width of the three-dimensional spiral coil in the buffer material space around the box are larger than the length and width of the three-dimensional spiral receiving coil in the space at the drone end.

[0009] Furthermore, the receiving coil at the drone end is wound with a narrow copper foil tape and wrapped with a waterproof tape on the outside to reduce the weight of the receiving end.

[0010] Furthermore, after use, the drone can be placed in the storage box, eliminating the need to manually remove the drone and connect it to a charger for recharging. The storage box containing the embedded passive coil, with the drone inside, can be placed directly on a desktop or above a ground-based transmitting coil. Through the tight magnetic field coupling between the desktop or ground-based transmitting coil, the passive coil structure embedded in the box's cushioning material, and the drone's receiving coil, efficient, contactless energy recharging is achieved for the drone inside the box.

[0011] The present invention can solve the problem of contactless power supply for precision electrical equipment such as drones without unpacking them, and fully utilizes the buffer material space of a dedicated box, embeds a new passive coil structure, and further improves system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described and explained below in conjunction with the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of a box-type contactless power supply system for drones based on a box-embedded passive coil according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0014] The technical solutions of the present invention will be more clearly and completely explained below through description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0015] The present invention describes a box-type contactless power supply system for unmanned aerial vehicles based on a passive coil embedded in a box. The designed system includes a transmitting end DC power supply, a high-frequency inverter, a transmitting end compensation circuit, an energy transmitting coil, a passive coil structure embedded in the box buffer material, a coil compensation capacitor embedded in the box, an energy receiving coil, a receiving end compensation capacitor, a receiving end rectifier circuit, and a load.

[0016] The applicable box is made of non-metallic material and contains buffer material. A passive coil structure is embedded in the buffer material of the box. A flat spiral coil is embedded in the buffer material at the bottom of the box. A spatial three-dimensional spiral coil is embedded in the buffer material around the box.

[0017] The passive coil structure embedded inside the box buffer material is composed of a bottom plane rectangular spiral coil and a surrounding space three-dimensional spiral rectangular coil connected in series. The two are connected in series to form an overall embedded passive coil structure, and the whole is compensated to a resonant state using a series compensation capacitor.

[0018] The energy transmitting coil at the desktop or ground end adopts a planar rectangular spiral structure, and the transmitting coil is connected to the transmitting end high-frequency inverter and the transmitting end compensation circuit; the energy receiving coil at the drone end adopts a spatial three-dimensional spiral rectangular coil structure, and the coil is installed around the drone bracket. The lowest wire turn at the bottom of the spatial three-dimensional receiving coil is 3 cm to 5 cm away from the bottom of the bracket to ensure that the coil is not easily damaged when the drone takes off and lands. The highest wire turn of the spatial three-dimensional receiving coil is 3 cm to 5 cm away from the bottom of the drone fuselage to reduce the interference of the receiving coil on the internal component circuits of the fuselage. The receiving coil is connected to the receiving end compensation circuit and the rectifier circuit.

[0019] The size of the planar spiral transmitting coil does not exceed the size of the bottom of the drone storage box. The length and width of the planar spiral embedded coil of the buffer material at the bottom of the box are smaller than the size of the planar road spiral coil. The length and width of the planar spiral embedded coil at the bottom of the box are the same as the length and width of the three-dimensional spiral receiving coil in the space at the drone end. The length and width of the three-dimensional spiral coil in the buffer material space around the box are larger than the length and width of the three-dimensional spiral receiving coil in the space at the drone end.

[0020] The receiving coil at the drone end is wound with a narrow copper foil tape and wrapped with waterproof tape on the outside to reduce the weight of the receiving end.

[0021] After use, the drone is placed in the storage box, and there is no need to manually take out the drone and then connect it to the charger for power recharge. The aforementioned storage box containing the embedded passive coil with the drone placed inside is directly placed as a whole on the desktop or above the ground-end transmitting coil. Through the close coupling of the magnetic field between the desktop or ground-end transmitting coil, the passive coil structure embedded in the box buffer material, and the drone-end receiving coil, non-contact and efficient energy recharge for the drone inside the box is achieved. The present invention can solve the problem of non-contact power recharge for precision electrical equipment such as drones without unpacking, and fully utilizes the buffer material space of the dedicated box, embeds a new passive coil structure, and further improves system efficiency.

[0022] The above-described specific embodiments merely describe preferred embodiments of the present invention and do not limit the scope of protection of the present invention. Any modifications, substitutions, and improvements made to the technical solution of the present invention by a person skilled in the art based on the textual description and drawings provided herein, without departing from the design concept and spirit of the present invention, shall fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A UAV box-type contactless power supply system based on a box-embedded passive coil, characterized in that: The designed system includes a transmitting end DC power supply, a high-frequency inverter, a transmitting end compensation circuit, an energy transmitting coil, a passive coil structure embedded in the box buffer material, a coil compensation capacitor embedded in the box, an energy receiving coil, a receiving end compensation capacitor, a receiving end rectifier circuit, and a load. The applicable box is made of non-metallic material and contains buffer material. The passive coil structure is embedded in the buffer material of the box. The flat spiral coil is embedded in the buffer material at the bottom of the box. The three-dimensional spiral coil is embedded in the buffer material around the box. The energy receiving coil at the drone end adopts a spatial three-dimensional spiral rectangular coil structure, which is installed around the drone bracket; The passive coil structure embedded in the box buffer material is composed of a planar rectangular spiral coil embedded in the buffer material at the bottom of the box and a three-dimensional spiral rectangular coil embedded in the buffer material around the box, which are connected in series. After the two are connected in series, a passive coil structure embedded in the buffer material is formed as a whole, and the whole is compensated to a resonant state using a series compensation capacitor; the energy transmitting coil on the desktop or ground end adopts a planar rectangular spiral structure, and the transmitting coil is connected to the transmitting end high-frequency inverter and the transmitting end compensation circuit. The high-frequency inverter includes a transmitting end DC power supply, and the transmitting end DC power supply, high-frequency inverter and transmitting end compensation circuit are located outside the box; the magnetic fields between the desktop or ground end transmitting coil, the passive coil structure embedded in the box buffer material and the receiving coil on the drone end are tightly coupled.

2. The UAV compartment box-type contactless power supply system based on the box-embedded passive coil according to claim 1 is characterized in that: The lowest turn of the spatial three-dimensional receiving coil is 3 cm to 5 cm away from the bottom of the bracket to ensure that the coil is not easily damaged when the drone takes off and lands. The highest turn of the spatial three-dimensional receiving coil is 3 cm to 5 cm away from the bottom of the drone fuselage to reduce the interference of the receiving coil on the internal component circuits of the fuselage. The receiving coil is connected to the receiving end compensation circuit and the rectifier circuit.

3. The UAV box-type contactless power supply system based on the box-embedded passive coil according to claim 1 is characterized in that: The size of the planar spiral transmitting coil shall not exceed the size of the bottom of the UAV storage box. The length and width of the planar spiral embedded coil of the buffer material at the bottom of the box shall be smaller than the size of the planar road spiral coil. The length and width of the planar spiral embedded coil at the bottom of the box shall be the same as the length and width of the three-dimensional spiral receiving coil in the space at the UAV end. The length and width of the three-dimensional spiral coil in the buffer material space around the box shall be larger than the length and width of the three-dimensional spiral receiving coil in the space at the UAV end.

4. The UAV compartment box-type contactless power supply system based on the box-embedded passive coil according to claim 1 is characterized in that: The receiving coil on the drone end is wound with a narrow copper foil tape and wrapped with waterproof tape on the outside to reduce the weight of the receiving end.

5. The UAV compartment box-type contactless power supply system based on the box-embedded passive coil according to claim 1 is characterized in that: After use, the drone is placed in the storage box. There is no need to manually take out the drone and then connect it to the charger for power recharge. The storage box with the embedded passive coil inside the drone is directly placed on the desktop or above the ground-end transmitting coil. The magnetic field between the desktop or ground-end transmitting coil, the embedded passive coil structure in the box buffer material and the drone-end receiving coil is tightly coupled, so that non-contact and efficient energy recharge can be achieved for the drone inside the box.

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