Mooring unmanned aerial vehicle

Abstract

The utility model belongs to the technical field of unmanned aerial vehicles, and particularly relates to a mooring unmanned aerial vehicle which comprises an unmanned aerial vehicle carrier, a power supply mechanism, an undercarriage and a clamping mechanism, the power supply mechanism is connected with the unmanned aerial vehicle carrier, and the power supply mechanism comprises a ground power supply module, a cable and an unmanned aerial vehicle receiving end. The ground power supply module is connected with an unmanned aerial vehicle receiving end through a cable, the unmanned aerial vehicle receiving end is carried on an unmanned aerial vehicle carrier, and an undercarriage is arranged on the unmanned aerial vehicle carrier; the clamping mechanism is arranged on the undercarriage, the ground power supply module supplies power to the unmanned aerial vehicle carrier through the cable, the clamping mechanism is arranged on the undercarriage of the unmanned aerial vehicle carrier, the double-end lead screw is rotated to drive the clamping sleeves to get close to each other, the clamping sleeves clamp the outer portion of the upper end of the cable, and the cable is clamped and fixed. The cable is prevented from falling off during falling and dragging, and the connection stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a tethered unmanned aerial vehicle. Background Art

[0002] At present, the basic mode of tethered drones (multi-rotor drones powered directly by conductive cables) is to generate high-voltage direct current (400V~1000V) on the ground, then transmit it to the drone end through cables, and convert it into low-voltage direct current (28V~100V) through on-board step-down equipment to provide it to the drone and the equipment on the drone. Due to the capacity limitation of the on-board step-down equipment, the high-voltage direct current voltage used in the tethered drone system is currently mainly limited to a range below 1000V. When the power demand of the drone is certain, the cable power loss (proportional to the cable resistance), cable voltage loss (proportional to the cable resistance), cable weight (proportional to the thickness of the cable), cable resistance (inversely proportional to the cross-sectional area of ​​the cable conductor), cable wind resistance (proportional to the outer diameter of the cable), etc. are all related to the transmission voltage.

[0003] Due to the deadweight of the conductive cable and the force of wind, the cable ends connected to the drone are easily weighed down and fall off, affecting the stability of the connection. To this end, the present application proposes a tethered drone. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems and / or the problems existing in the existing tethered drones, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a tethered UAV, in which a ground power supply module supplies power to the UAV carrier through a cable, and a clamping mechanism is arranged on the landing gear of the UAV carrier. The double-headed screw is rotated to drive the sleeves to approach each other so that the sleeves are clamped on the outside of the upper end of the cable, and the cable is clamped and fixed to prevent the cable from falling off when falling and dragging, thereby improving the connection stability.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A tethered drone, comprising:

[0009] UAV carrier;

[0010] A power supply mechanism is connected to the UAV carrier, the power supply mechanism includes a ground power supply module, a cable and a UAV receiving end, the ground power supply module is connected to the UAV receiving end through a cable, and the UAV receiving end is carried on the UAV carrier;

[0011] A landing gear, arranged on the UAV carrier;

[0012] The clamping mechanism is arranged on the landing gear.

[0013] As a preferred solution for a tethered UAV described in the utility model, the landing gear includes a bracket, a support plate, a slide bar and a rotating hole, the bracket is arranged on both sides of the bottom of the UAV carrier, and support plates are arranged on the brackets, one end of the support plates on both sides is connected to the slide bar, and the other end of the support plates on both sides is provided with a rotating hole.

[0014] As a preferred solution for a tethered drone described in the utility model, the clamping mechanism includes a double-headed screw, a movable block and a sleeve, the double-headed screw rotating rod is connected between the rotating holes, the movable block is connected between the double-headed screw and the sliding rod, and corresponding sleeves are arranged in the centers of the movable blocks on both sides.

[0015] As a preferred solution of the tethered drone described in the utility model, a bearing is provided at the connection position between the rotating hole and the double-headed screw rod.

[0016] As a preferred solution of the tethered drone described in the utility model, the jacket is a semicircular piece, and an anti-slip rubber pad is provided on the inner wall of the jacket.

[0017] Compared with the prior art: the ground power supply module of the utility model supplies power to the UAV carrier through a cable, and a clamping mechanism is arranged on the landing gear of the UAV carrier. The double-headed screw is rotated to drive the sleeves to approach each other, so that the sleeves are clamped on the outside of the upper end of the cable, and the cable is clamped and fixed to prevent the cable from falling off when falling and dragging, thereby improving the connection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 This is a schematic diagram of the shaft side structure of the utility model;

[0020] Figure 2This is a schematic diagram of the structure of the power supply mechanism of the utility model;

[0021] Figure 3 This is a schematic diagram of the landing gear structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the clamping mechanism of the utility model;

[0023] Figure 5 This is a schematic diagram of a basic parallel group structure composed of N BCM modules in the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of a 3*N airborne power supply group composed of three BCM (N parallel) units in the utility model;

[0025] Figure 7 This is a schematic diagram of the equivalent high-voltage principle structure of the utility model.

[0026] In the figure: 100 UAV carrier, 200 power supply mechanism, 210 ground power supply module, 220 cable, 230 UAV receiving end, 300 landing gear, 310 bracket, 320 support plate, 330 slide rod, 340 rotating hole, 400 clamping mechanism, 410 double-headed screw rod, 420 movable block, 430 jacket. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] The utility model provides a tethered UAV. The ground power supply module supplies power to the UAV carrier through a cable. A clamping mechanism is arranged on the landing gear of the UAV carrier. By rotating the double-headed screw rod, the clamping sleeves are driven to approach each other, so that the clamping sleeves are clamped on the outer part of the upper end of the cable, and the cable is clamped and fixed to prevent the cable from falling off during falling and dragging, thereby improving the connection stability. Figure 1-Figure 7 , including: a UAV carrier 100, a power supply mechanism 200, a landing gear 300 and a clamping mechanism 400.

[0032] The power supply mechanism 200 is connected to the drone carrier 100. The power supply mechanism 200 includes a ground power supply module 210, a cable 220 and a drone receiving end 230. The ground power supply module 210 is connected to the drone receiving end 230 through the cable 220. The drone receiving end 230 is mounted on the drone carrier 100.

[0033] Among them, the ground power supply module 210 uses a bus converter module (Bus Converter Module-BCM) as a basic DCDC step-down conversion unit to complete the proportional step-down from DC high voltage to DC low voltage, and uses the low voltage DC as the UAV and;

[0034] Connect the positive and negative poles of the high-voltage input terminals and the positive and negative poles of the low-voltage output terminals of N BCM modules in parallel to form a parallel DCDC power conversion unit composed of N modules (such as Figure 1 ), its output power is N times that of a single BCM module;

[0035] Taking advantage of the isolation characteristics of the BCM module input and output, an ACDC AC to DC power supply is used as the input for each BCM (N parallel) unit, and the low-voltage outputs of M BCM (N parallel) units are connected in parallel (such as Figure 2 ), the total output power is M*N times of a single BCM module;

[0036] Connect each ACDC unit output and BCM (N parallel) unit input in series (such as Figure 2 The dashed line in the middle shows the power supply for the BCM (N parallel) unit (as shown in Figure 2 ), the actual transmission cable can be simplified to Figure 3 As shown;

[0037] Since all BCM (N parallel) units are connected in parallel to output the same voltage, and all BCM (N parallel) units have the same input voltage, the load output by each BCM (N parallel) unit is the same, so the input current of each BCM (N parallel) unit is equal, that is, Figure 3 The current flowing out of point A is equal to the current flowing into point B, so there is basically no current on the line between A and B, which can be called a balanced line.

[0038] Based on the above arrangement, the 3-loop mode can obtain an equivalent high voltage of 3 times the original BCM module input voltage (800V), reaching 2400V. According to the power demand of the drone, the current value to be passed through the main line of the tethered cable can be determined according to the 2400V equivalent high voltage. In order to reduce the power loss and voltage loss on the cable, the main line can choose a conductor with a large cross-sectional area and a small resistance. Since the current passing through the balance line is extremely small, the conductor with a small cross-sectional area and a large resistance can be selected. In this way, the overall weight and outer diameter of the cable can be effectively controlled, thereby greatly reducing the weight of the cable and the influence of wind resistance;

[0039] Based on multi-circuit series power supply, the equivalent multiplication of the power supply voltage can be achieved, thereby doubling the current value in the tethered cable. When the length of the tethered cable is constant and the limit ratio (or absolute value) of the cable power loss and voltage loss is determined, a tethered cable with lighter weight (thinner conductor) and thinner outer diameter can be used, thereby obtaining a smaller dead weight and smaller cable wind resistance tension, so that the drone can obtain a more efficient load carrying capacity;

[0040] When the power demand of the drone is constant, the total energy demand of the whole system is reduced and the energy utilization rate is improved by effectively reducing the power loss on the cable. On the ground, power supply equipment with lower rated power can be selected to reduce the cost of the system and the weight of the equipment.

[0041] When the power demanded by the drone fluctuates, the voltage lost on the cable is smaller when the output voltage of the ground power supply is constant. Even if the power demanded by the drone fluctuates, resulting in the voltage loss on the tethered cable fluctuating, a higher transmission voltage can make the voltage transmitted to the input end of the drone's onboard power supply closer to the voltage at the output end of the ground power supply, that is, there is only a small fluctuation, which is more conducive to the reliable operation of the back-end power-consuming equipment.

[0042] The equivalent high-voltage power supply method can improve the input voltage of the onboard power supply of the tethered UAV through multi-stage series connection, and expand the total power output through the parallel connection of the onboard power supply modules. The equipment or modules used are all mature and reasonably priced shelf products in the current market. This can adapt to the needs of longer tethered cables and greater power output, meet the needs of high-power tethered UAVs and tethered UAVs with longer cables, and break through the current development bottleneck of tethered UAVs.

[0043] The landing gear 300 is arranged on the UAV carrier 100. The landing gear 300 includes a bracket 310, a support plate 320, a slide bar 330 and a rotation hole 340. The bracket 310 is arranged on both sides of the bottom of the UAV carrier 100. The support plates 320 are arranged on the bracket 310. The slide bar 330 is connected at one end between the support plates 320 on both sides, and the rotation hole 340 is opened at the other end between the support plates 320 on both sides.

[0044] The two side brackets 310 are symmetrically arranged and used as support for the drone during take-off and landing.

[0045] The clamping mechanism 400 is arranged on the landing gear 300, and the clamping mechanism 400 includes a double-ended screw rod 410, a movable block 420 and a jacket 430. The rotating rod of the double-ended screw rod 410 is connected between the rotating holes 340, the movable block 420 is connected between the double-ended screw rod 410 and the sliding rod 330, and the centers of the movable blocks 420 on both sides are provided with jackets 430 corresponding to each other;

[0046] Among them, a bearing is provided at the connection position between the rotating hole 340 and the double-headed screw rod 410. The double-headed screw rod 410 is rotated to drive the movable block 420 to move, and the movable block 420 drives the sleeve 430 to move, so that the sleeve 430 is clamped on the cable 220 to clamp and fix the cable 220.

[0047] To improve the clamping stability, the jacket 430 is a semicircular piece, and an anti-skid rubber pad is provided on the inner wall of the jacket 430. The anti-skid rubber pad contacts the cable 220 to improve the anti-skid effect, improve the clamping stability, and prevent the cable 220 from sliding down and falling off under weight.

[0048] During specific use, the ground power supply module 210 supplies power to the UAV carrier 100 through the cable 220. A clamping mechanism 400 is set on the landing gear 300 of the UAV carrier 100. The double-headed screw 410 is rotated to drive the sleeves 430 to approach each other, so that the sleeves 430 are clamped on the outside of the upper end of the cable 220, and the cable 220 is clamped and fixed to prevent the cable 220 from falling off during falling and dragging, thereby improving the connection stability.

[0049] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tethered drone, characterized in that: include: Drone Carrier (100); A power supply mechanism (200) connected to the drone carrier (100), the power supply mechanism (200) comprising a ground power supply module (210), a cable (220) and a drone receiving end (230), the ground power supply module (210) being connected to the drone receiving end (230) via the cable (220), and the drone receiving end (230) being mounted on the drone carrier (100); A landing gear (300) is arranged on the UAV carrier (100); The clamping mechanism (400) is arranged on the landing gear (300).

2. A tethered drone according to claim 1, characterized in that: The landing gear (300) comprises a bracket (310), a support plate (320), a slide bar (330) and a rotation hole (340). The bracket (310) is arranged on both sides of the bottom of the UAV carrier (100). The support plates (320) are arranged on the bracket (310). One end between the support plates (320) on both sides is connected to the slide bar (330), and the other end between the support plates (320) on both sides is provided with a rotation hole (340).

3. A tethered drone according to claim 2, characterized in that: The clamping mechanism (400) comprises a double-ended screw (410), a movable block (420) and a jacket (430); a rotating rod of the double-ended screw (410) is connected between the rotating holes (340); the movable block (420) is connected between the double-ended screw (410) and the sliding rod (330); and jackets (430) corresponding to each other are arranged at the centers of the movable blocks (420) on both sides.

4. A tethered drone according to claim 3, characterized in that: A bearing is provided at the connection position between the rotating hole (340) and the double-ended screw rod (410).

5. A tethered drone according to claim 3, characterized in that: The jacket (430) is a semicircular piece, and an anti-slip rubber pad is provided on the inner wall of the jacket (430).

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