A multi-position charging nest, unmanned aerial vehicle and charging system

Abstract

The present invention discloses a nest, a drone and a charging system for charging multiple positions simultaneously. The parking device includes a parking platform, a charging device, a passive fixing device and a plurality of active fixing devices. The passive fixing device is fixedly installed on one side of the parking platform, and each active fixing device is slidably installed on the parking platform. The active fixing device moves toward or away from the side of the passive fixing device. The charging device is provided with a plurality of positive electrode contacts and a plurality of negative electrode contacts. The passive fixing device is provided with a plurality of positive electrode contacts at intervals along the length direction on the side facing the active fixing device, and each active fixing device is provided with a plurality of negative electrode contacts at intervals along the length direction on the side facing the passive fixing device. The structure is simple, the cost is low, and drones of different specifications and models can be charged simultaneously, the deployment cost of the drone nest is reduced, and the charging efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drone nests, and in particular to a nest for charging multiple drones at the same time, a drone and a charging system. Background Art

[0002] In power inspection, drones are often used to replace manual automatic inspection. However, the transmission line span is long and the power endurance of drones is limited. It is often necessary to set up multiple drone nests at intervals along the transmission line to automatically charge the drones in the middle, so as to extend the inspection range of the drones and improve the inspection efficiency. Most of the drone nests in the prior art have only one helipad and can only charge one drone at a time, resulting in low charging efficiency of the drone nests. In particular, when one drone is charging, the other drone cannot dock, which eventually causes the other drone to fall due to power exhaustion, causing property losses. Therefore, it is necessary to set up two or more drone nests at the same location, which increases the installation and maintenance costs. In the prior art, there are also some drone nests that have multiple helipads and can dock multiple drones at the same time, but can only charge drones of the same specifications and models at the same time. In power inspection, according to the different inspection responsible units and inspection items, the specifications of the drones used for inspection are often different, which also leads to the inability to charge drones of different specifications at the same time. Therefore, it is necessary to improve them. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a multi-camera nest, a drone and a charging system for simultaneous charging, which has a simple structure and low cost, can charge drones of different specifications and models at the same time, reduce the cost of deploying drone nests, and improve charging efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a machine nest for charging multiple machines at the same time, comprising a machine case, a control circuit, a stop identification device and a stop device, the stop device is installed inside the machine case, the stop identification device is installed on the stop device, the control circuit is electrically connected to the stop identification device and the stop device respectively, the stop device comprises a stop platform, a charging device, a passive fixing device and a plurality of active fixing devices, the passive fixing device is fixedly installed on one side of the stop platform, each active fixing device is slidably installed on the stop platform, the active fixing device moves towards or away from one side of the passive fixing device, the charging device is provided with a plurality of positive electrode contacts and a plurality of negative electrode contacts, a plurality of positive electrode contacts are arranged at intervals along the length direction on the side of the passive fixing device facing the active fixing device, each active fixing device is arranged at intervals along the length direction on the side of the passive fixing device facing the passive fixing device, each negative electrode contact is arranged opposite to the corresponding positive electrode contact, and the control circuit is electrically connected to each positive electrode contact, each negative electrode contact and each active fixing device respectively;

[0005] The shutdown identification device includes a position acquisition camera and a display screen. The position acquisition camera is fixedly installed on one side of the shutdown device, and the display screen is installed on the shutdown platform. The position acquisition camera and the display screen are electrically connected to the control circuit respectively.

[0006] In a further technical solution, each active fixing device includes a clamping drive mechanism, a charging cross bar and two slide rails, the two slide rails are fixedly installed on the left and right sides of the parking platform respectively, the left and right ends of the charging cross bar are slidably connected to the two slide rails respectively, the clamping drive mechanism is installed on one side of any slide rail, the clamping drive mechanism is transmission-connected to the charging cross bar, the control circuit is electrically connected to the clamping drive mechanism, and the negative contact piece is fixedly installed on the side of the charging cross bar facing the active fixing device;

[0007] The length of the charging crossbar of the first active fixture is less than the length of the charging crossbar of the second active fixture, and the length of the charging crossbar of the second active fixture is less than the length of the charging crossbar of the third active fixture.

[0008] The charging crossbar of the second active fixture is located between the charging crossbar of the first active fixture and the charging crossbar of the third active fixture.

[0009] In a further technical solution, an arc-shaped passive slot is provided on one side of the passive fixing device facing the active fixing device, each positive electrode contact is installed in the passive slot at intervals, and an insulating sheet is provided between two adjacent positive electrode contacts;

[0010] An arc-shaped active slot is provided on the side of the charging cross bar facing the passive fixing device, and each negative electrode contact is installed in the active slot at intervals. An insulating sheet is provided between two adjacent negative electrode contacts, and an avoidance slope is provided on the upper part of the side of the charging cross bar away from the passive fixing device.

[0011] In a further technical solution, the clamping drive mechanism includes a driving motor, a screw rod, a sliding rod and two sliders. The screw rod and the sliding rod are respectively rotatably installed inside the two sliding rails of the same active fixing device. The driving motor is fixedly installed at one end of the sliding rail. The driving motor is transmission-connected to the screw rod. The upper parts of the two sliders are respectively fixedly connected to the two ends of the charging cross bar. The lower part of one slider is threadedly connected to the screw rod, and the lower part of the other slider is slidingly connected to the sliding rod. The driving motor is electrically connected to the control circuit.

[0012] In a further technical solution, the parking platform is provided with a mounting groove with an opening facing upward, the display screen is embedded in the mounting groove, and the mounting groove is covered with a transparent upper cover.

[0013] In a further technical solution, the display screen is a pressure-sensitive screen, and the lower surface of the upper cover is in contact with the pressure-sensitive screen.

[0014] In a further technical solution, the upper cover is provided with a heating wire for heating the upper cover, and the heating wire is bent and circuitously arranged along the length direction of the upper cover on the upper surface or the lower surface of the upper cover.

[0015] In a further technical solution, the chassis includes a box body, a left cover body and a right cover body, the left cover body and the right cover body are respectively hinged to the box body through a connecting rod assembly, and a cover opening drive mechanism is provided inside the chassis, the cover opening drive mechanism is transmission connected to the connecting rod assembly, and the control circuit is transmission connected to the cover opening drive mechanism.

[0016] A multi-camera simultaneous charging drone comprises a fuselage, a positioning camera, a battery, a charging management circuit and a landing gear. The battery and the charging management circuit are respectively installed on the fuselage, the battery and the charging management circuit are electrically connected, and the positioning camera and the landing gear are respectively installed at the lower part of the fuselage.

[0017] The landing gear includes two cross bars and at least two vertical bars, the upper ends of the two vertical bars are respectively connected to the fuselage of the UAV, and the lower ends of the two vertical bars are respectively connected to the corresponding two cross bars, the two cross bars are spaced and arranged in parallel, the two vertical bars and the two cross bars are hollow tubular structures, at least one charging contact is installed inside the two cross bars respectively, the two charging contacts are respectively electrically connected to the charging management circuit, the charging contact is provided with an elastic ball, the elastic ball extends out of the outer side of the cross bar, when the machine nest charges the UAV, the landing gear is clamped between the passive fixing device and the active fixing device, and the two elastic balls of the two charging contacts are respectively abutted against and electrically connected to the positive contact and the negative contact.

[0018] A charging system for charging multiple machines simultaneously includes a cloud management server, multiple machine nests and multiple drones. The cloud management server is wirelessly connected to each machine nest and each drone through a cellular network. The drone receives the location information of adjacent machine nests through the cloud server and generates navigation data. The machine nest receives the location information of nearby drones through the cloud server and starts a charging program.

[0019] After adopting the above structure, the advantages of the present invention compared with the prior art are: drones of different specifications and models are clamped in turn between the corresponding active fixing devices and the passive fixing devices through each active fixing device, and the positive contact and the negative contact are simultaneously connected to the charging contact of the drone, so that the drone is fixed and quickly charged at the same time. It has a simple structure and low cost, and can charge multiple drones of different specifications and sizes at the same time; when deploying the machine nest, there is no need to deploy different drones separately, which reduces the deployment cost; one machine nest can charge multiple drones at the same time, reducing the number of machine nest deployments while increasing the charging stop positions, thereby improving the charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the state of the present invention when the left cover and the right cover are hidden and the charging is stopped;

[0023] Figure 3 The present invention Figure 2 A top view of

[0024] Figure 4 This is a side view of the present invention when the machine is stopped for charging;

[0025] Figure 5 It is a structural schematic diagram of the shutdown device of the present invention;

[0026] Figure 6 is an exploded view of the shutdown device of the present invention;

[0027] Figure 7 is an exploded view of the active fixing device of the present invention;

[0028] Figure 8 is a schematic structural diagram of the drone of the present invention;

[0029] Fig. 9 It is a connection diagram of the charging system of the present invention.

[0030] In the figure:

[0031] 11 box body, 12 left cover body, 13 right cover body, 14 connecting rod assembly;

[0032] 21 acquisition camera, 22 display screen;

[0033] 31 parking platform, 311 mounting slot, 312 upper cover, 32 positive contact piece, 33 negative contact piece, 34 passive fixing device, 341 passive card slot, 35 active fixing device, 351 charging cross bar, 352 active card slot, 353 avoidance slope, 354 slide rail, 355 driving motor, 356 slider, 357 screw rod, 358 slide rod;

[0034] 4 body, 41 positioning camera, 42 battery, 43 cross bar, 44 vertical bar, 45 elastic marble. DETAILED DESCRIPTION

[0035] The following are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

[0036] A machine nest for charging multiple cameras at the same time, such as Figures 1 to 7 As shown, it includes a chassis, a control circuit, a stop identification device and a stop device, the stop device is installed inside the chassis, the stop identification device is installed on the stop device, the control circuit is electrically connected to the stop identification device and the stop device, and is characterized in that: the stop device includes a stop platform 31, a charging device, a passive fixing device 34 and a plurality of active fixing devices 35, the passive fixing device 34 is fixedly installed on one side of the stop platform 31, and each active fixing device 35 is slidably installed on the stop platform 31, and the active fixing device 35 moves toward or away from one side of the passive fixing device 34, the charging device is provided with a plurality of positive contact members 32 and a plurality of negative contact members 33, the passive fixing device 34 A plurality of positive electrode contacts 32 are arranged at intervals along the length direction on one side facing the active fixing device 35, and a plurality of negative electrode contacts 33 are arranged at intervals along the length direction on one side facing the passive fixing device 34 of each active fixing device 35, each negative electrode contact 33 is arranged opposite to the corresponding positive electrode contact 32, and the control circuit electrically connects each positive electrode contact 32, each negative electrode contact 33 and each active fixing device 35 respectively; the shutdown identification device includes a position acquisition camera 21 and a display screen 22, the position acquisition camera 21 is fixedly installed on one side of the shutdown device, the display screen 22 is installed on the shutdown platform 31, and the position acquisition camera 21 and the display screen 22 are electrically connected to the control circuit respectively.

[0037] A drone with multiple camera positions charging simultaneously, such as Figure 8As shown in the figure, the drone includes a fuselage 4, a positioning camera 41, a battery 42, a charging management circuit, and landing gears. The battery 42 and the charging management circuit are respectively installed on the fuselage 4. The battery 42 is electrically connected to the charging management circuit. The positioning camera 41 and the landing gears are respectively installed at the lower part of the fuselage 4. The landing gears include two crossbars 43 and at least two vertical rods 44. The upper ends of the two vertical rods 44 are respectively connected to the fuselage 4 of the drone, and the lower ends of the two vertical rods 44 are respectively connected to the corresponding two crossbars 43. The two crossbars 43 are arranged at intervals and in parallel. The two vertical rods 44 and the two crossbars 43 are tubular structures with hollow interiors. At least one charging contact is respectively installed inside the two crossbars 43. The two charging contacts are respectively electrically connected to the charging management circuit. The charging contact is provided with an elastic ball 45. The elastic ball 45 extends out of the outer side surface of the crossbar 43. When the drone is charged by the drone nest, the landing gears are clamped between the passive fixing device 34 and the active fixing device 35. The two elastic balls 45 of the two charging contacts respectively abut and cooperate with the positive contact 32 and the negative contact 33 and are electrically connected. When the drone docks for charging, the drone nest judges the rechargeable position according to the acquisition camera 21, and displays a parking guidance image at the corresponding rechargeable position through the display screen 22. The positioning camera 41 performs precise navigation and landing according to the parking guidance image.

[0038] Traditional drone nests can only charge one drone at a time, with low charging efficiency. When deploying drone nests, more drone nests are required to meet the charging demand, resulting in high deployment costs. In the prior art, drone nests that can charge multiple drones simultaneously must charge drones of the same specification and size at the same time, and cannot charge drones of different specifications and sizes simultaneously. When deploying drone nests, drone nests adapted to drones of different specifications and sizes still need to be deployed. However, in the present invention, each active fixing device 35 respectively clamps drones of different specifications and models between the corresponding active fixing device 35 and the passive fixing device 34 in sequence, and at the same time, the positive contact 32 and the negative contact 33 are simultaneously conducted with the charging contacts of the drone, enabling fast charging while fixing the drone. The structure is simple and the cost is low. It can charge multiple drones of different specifications and sizes simultaneously; when deploying drone nests, there is no need to deploy them separately for different drones, reducing the deployment cost; one drone nest can charge multiple drones simultaneously, reducing the number of deployed drone nests and increasing the charging and parking positions, improving the charging efficiency.

[0039] Specifically, each active fixing device 35 includes a clamping drive mechanism, a charging cross bar 351 and two slide rails 354, the two slide rails 354 are respectively fixedly installed on the left and right sides of the parking platform 31, the left and right ends of the charging cross bar 351 are respectively slidably connected to the two slide rails 354, the clamping drive mechanism is installed on one side of any slide rail 354, the clamping drive mechanism is transmission-connected to the charging cross bar 351, the control circuit is electrically connected to the clamping drive mechanism, and the negative contact member 33 is fixedly installed on the side of the charging cross bar 351 facing the active fixing device 35; the length of the charging cross bar 351 of the first active fixing device 35 is less than the length of the charging cross bar 351 of the second active fixing device 35, the length of the charging cross bar 351 of the second active fixing device 35 is less than the length of the charging cross bar 351 of the third active fixing device 35, and the charging cross bar 351 of the second active fixing device 35 is located between the charging cross bar 351 of the first active fixing device 35 and the charging cross bar 351 of the third active fixing device 35. Each charging cross bar 351 slides in sequence along the front-rear direction on the parking platform 31. When a smaller drone is docked for charging, the charging cross bar 351 of the first active fixing device 35 first moves toward the passive fixing device 34 until the landing gear of the drone is clamped between the passive fixing device 34 and the charging cross bar 351, so that the two elastic pins 45 on the landing gear respectively press against the positive contact piece 32 and the negative contact piece 33, thereby charging; when a medium-sized drone is docked for charging, the charging cross bar 351 of the second active fixing device 35 first moves toward the passive fixing device 34. The passive fixing device 34 moves until the landing gear of the UAV is clamped between the passive fixing device 34 and the charging cross bar 351, so that the two elastic pins 45 on the landing gear respectively abut against the positive contact 32 and the negative contact 33; when a larger UAV is docked for charging, the charging cross bar 351 of the third active fixing device 35 first moves toward the passive fixing device 34 until the landing gear of the UAV is clamped between the passive fixing device 34 and the charging cross bar 351, so that the two elastic pins 45 on the landing gear respectively abut against the positive contact 32 and the negative contact 33. The active fixing device 35 makes the positive contact 32 and the negative contact 33 respectively conduct with the charging contact of the UAV to achieve charging while moving to clamp and fix the UAV, which has a simple structure and low cost; when multiple UAVs of the same size are docked for charging at the same time, the charging cross bar 351 of one of the active fixing devices 35 clamps and fixes multiple UAVs at the same time.

[0040] Specifically, an arc-shaped passive card slot 341 is provided on the side of the passive fixing device 34 facing the active fixing device 35, and each positive contact 32 is installed in the passive card slot 341 at intervals, and an insulating sheet is provided between two adjacent positive contact pieces 32; an arc-shaped active card slot 352 is provided on the side of the charging cross bar 351 facing the passive fixing device 34, and each negative contact 33 is installed in the active card slot 352 at intervals, and an insulating sheet is provided between two adjacent negative contact pieces 33, and an avoidance slope 353 is provided on the upper part of the side of the charging cross bar 351 away from the passive fixing device 34. The active card slot 352 and the passive card slot 341 have an arc, so when clamping the drone, the drone is not easy to slide off the active fixing device 35 and the passive fixing device 34, thereby improving the clamping stability, and the positive contact 32 and the negative contact 33 are respectively attached to the inner walls of the active card slot 352 and the passive card slot 341, which can protect the positive contact 32 and the negative contact 33 from being wetted by rain in rainy weather, thereby improving safety; and an insulating sheet is provided between two adjacent positive contact pieces 32 and between two adjacent negative contact pieces 33 on the same charging cross bar 351, so that the control circuit can individually manage the charging of each drone that is charged at the same time, thereby further improving the charging efficiency, while reducing the risk of short circuit, and improving safety and stability.

[0041] Specifically, the clamping drive mechanism includes a drive motor 355, a screw rod 357, a slide rod 358 and two sliders 356. The screw rod 357 and the slide rod 358 are respectively rotatably installed inside the two slide rails 354 of the same active fixing device 35. The drive motor 355 is fixedly installed at one end of the slide rail 354. The drive motor 355 is transmission-connected to the screw rod 357. The upper parts of the two slide rods 356 are respectively fixedly connected to the two ends of the charging cross bar 351. The lower part of one slider 356 is threadedly connected to the screw rod 357, and the lower part of the other slider 356 is slidingly connected to the slide rod 358. The drive motor 355 is electrically connected to the control circuit. The driving motor 355 drives the screw rod 357 to rotate. When the screw rod 357 rotates, the slider 356 moves forward and backward, thereby driving the charging cross bar 351 to move forward and backward. The structure is simple and the cost is low. Preferably, the slider 358 is replaced by the screw rod 357. The two screw rods 357 are connected by a synchronization mechanism. The driving motor 355 is connected to the synchronization mechanism. The two screw rods 357 are driven to rotate at the same time through the synchronization mechanism, so that the charging cross bar 351 remains parallel to the passive fixing device 34 when moving.

[0042] Specifically, the parking platform 31 is provided with an upwardly opening mounting groove 311, the display screen 22 is embedded in the mounting groove 311, and the mounting groove 311 is covered with a transparent upper cover 312. The transparent upper cover 312 can protect the display screen 22, prevent the impact force of the drone during landing from damaging the display screen 22, extend the service life, and improve stability.

[0043] Specifically, the display screen 22 is a pressure-sensitive screen, and the lower surface of the upper cover 312 is in contact with the pressure-sensitive screen. The position acquisition camera 21 acquires the docking position of the drone, and calculates the remaining docking position through the control circuit to ensure that the next drone can dock and charge, while the pressure-sensitive screen assists the acquisition camera 21 in acquiring the docking position of the drone. When the drone is docked, the pressure-sensitive screen detects the position of the drone on the pressure-sensitive screen, and assists the acquisition camera 21 in positioning to improve accuracy.

[0044] Specifically, the upper cover 312 is provided with a heating wire for heating the upper cover 312, and the heating wire is bent and arranged on the upper surface or the lower surface of the upper cover 312 along the length direction of the upper cover 312. The display screen 22 displays a shutdown guidance image. When it rains, the upper cover 312 is prone to generate water vapor or rainwater. The upper cover 312 is heated by the heating wire to evaporate part of the water vapor or rainwater, and the light transmittance of the upper cover 312 is maintained, so that the drone can land accurately.

[0045] Specifically, the chassis includes a box body 11, a left cover body 12 and a right cover body 13. The left cover body 12 and the right cover body 13 are respectively hinged to the box body 11 through a connecting rod assembly 14. An opening drive mechanism is arranged inside the chassis. The opening drive mechanism is connected to the connecting rod assembly 14 by transmission, and the control circuit is connected to the opening drive mechanism by transmission. Under normal conditions, the left cover body 12 and the right cover body 13 are closed to package the docked and charged drone to prevent rain and foreign objects from entering and improve safety. When a drone takes off or lands, the opening drive mechanism opens the left cover body 12 and the right cover body 13 through the connecting rod assembly 14.

[0046] A charging system for charging multiple cameras at the same time, such as Fig. 9As shown, it includes a cloud management server, multiple machine nests and multiple drones. The cloud management server is wirelessly connected to each machine nest and each drone through a cellular network. The drone receives the location information of the adjacent machine nest through the cloud server and generates navigation data. The machine nest receives the location information of nearby drones through the cloud server and starts the charging program. When the drone needs to be charged, the drone sends a charging request and current coordinates to the cloud management server. The cloud management server sends the location information of the target nest to the drone according to the location of the nest and the charging parking position. The drone generates navigation data according to the location information of the target nest and goes to it. When the drone arrives at the nest, the cloud management server verifies that the drone information is correct and sends a charging instruction to the nest, so that the nest starts the charging program. The nest opens the left cover 12 and the right cover 13 and displays the parking guidance image on the display screen 22. The drone captures the parking guidance image through the positioning camera 41 for precise navigation and landing; after the display screen 22 and the acquisition camera 21 confirm that the drone is accurately docked, the clamping drive mechanism drives the charging cross bar 351 of the active fixing device 35 to move toward the passive fixing device 34 until the landing gear of the drone is clamped between the passive fixing device 34 and the charging cross bar 351, so that the two elastic pins 45 on the landing gear respectively abut against the positive contact 32 and the negative contact 33, thereby charging. No human intervention is required throughout the process, with a high degree of full automation and easy use.

[0047] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A machine nest for charging multiple machines at the same time, comprising a machine box, a control circuit, a stop identification device and a stop device, wherein the stop device is installed inside the machine box, the stop identification device is installed on the stop device, and the control circuit is electrically connected to the stop identification device and the stop device respectively. Features: The stopping device comprises a stopping platform (31), a charging device, a passive fixing device (34) and a plurality of active fixing devices (35); the passive fixing device (34) is fixedly mounted on one side of the stopping platform (31); each active fixing device (35) is slidably mounted on the stopping platform (31); the active fixing device (35) moves towards or away from the side of the passive fixing device (34); the charging device is provided with a plurality of positive electrode contacts (32) and a plurality of negative electrode contacts (33); a plurality of positive electrode contacts (32) are arranged at intervals along the length direction on the side of the passive fixing device (34) facing the active fixing device (35); a plurality of negative electrode contacts (33) are arranged at intervals along the length direction on the side of each active fixing device (35) facing the passive fixing device (34); each negative electrode contact (33) is arranged opposite to the corresponding positive electrode contact (32); and a control circuit is electrically connected to each positive electrode contact (32), each negative electrode contact (33) and each active fixing device (35); The shutdown identification device comprises a position acquisition camera (21) and a display screen (22), wherein the position acquisition camera (21) is fixedly mounted on one side of the shutdown device, and the display screen (22) is mounted on a shutdown platform (31), and the position acquisition camera (21) and the display screen (22) are electrically connected to a control circuit respectively.

2. A multi-camera charging nest according to claim 1, Features: Each of the active fixing devices (35) comprises a clamping drive mechanism, a charging cross bar (351) and two slide rails (354), the two slide rails (354) are respectively fixedly mounted on the left and right sides of the parking platform (31), the left and right ends of the charging cross bar (351) are respectively slidably connected to the two slide rails (354), the clamping drive mechanism is mounted on one side of any one of the slide rails (354), the clamping drive mechanism is transmission-connected to the charging cross bar (351), the control circuit is electrically connected to the clamping drive mechanism, and the negative electrode contact member (33) is fixedly mounted on the side of the charging cross bar (351) facing the active fixing device (35); The length of the charging cross bar (351) of the first active fixing device (35) is smaller than the length of the charging cross bar (351) of the second active fixing device (35), and the length of the charging cross bar (351) of the second active fixing device (35) is smaller than the length of the charging cross bar (351) of the third active fixing device (35). The charging cross bar (351) of the second active fixing device (35) is located between the charging cross bar (351) of the first active fixing device (35) and the charging cross bar (351) of the third active fixing device (35).

3. A multi-camera charging nest according to claim 2, Features: The passive fixing device (34) is provided with an arc-shaped passive slot (341) on one side facing the active fixing device (35), each of the positive electrode contact pieces (32) is installed in the passive slot (341) at intervals, and an insulating sheet is provided between two adjacent positive electrode contact pieces (32); The charging cross bar (351) is provided with an arc-shaped active slot (352) on one side facing the passive fixing device (34); each of the negative electrode contacts (33) is installed in the active slot (352) at intervals; an insulating sheet is provided between two adjacent negative electrode contacts (33); and an avoidance slope (353) is provided on the upper part of the side of the charging cross bar (351) away from the passive fixing device (34).

4. A multi-camera charging nest according to claim 2, Features: The clamping drive mechanism comprises a driving motor (355), a screw rod (357), a sliding rod (358) and two sliding blocks (356); the screw rod (357) and the sliding rod (358) are respectively rotatably mounted inside the two sliding rails (354) of the same active fixing device (35); the driving motor (355) is fixedly mounted on one end of the sliding rail (354); the driving motor (355) is transmission-connected to the screw rod (357); the upper parts of the two sliding blocks (356) are respectively fixedly connected to the two ends of the charging cross bar (351); the lower part of one sliding block (356) is threadedly connected to the screw rod (357); the lower part of the other sliding block (356) is slidingly connected to the sliding rod (358); and the driving motor (355) is electrically connected to the control circuit.

5. The multi-camera charging nest according to claim 1, Features: The parking platform (31) is provided with a mounting groove (311) with an opening facing upwards, the display screen (22) is embedded in the mounting groove (311), and the mounting groove (311) is covered with a transparent upper cover (312).

6. A multi-camera charging nest according to claim 5, Features: The display screen (22) is a pressure-sensitive screen, and the lower surface of the upper cover (312) is in contact with the pressure-sensitive screen.

7. A multi-camera charging nest according to claim 6, Features: The upper cover (312) is provided with an electric heating wire for heating the upper cover (312), and the electric heating wire is bent and arranged in a circuitous manner along the length direction of the upper cover (312) on the upper surface or the lower surface of the upper cover (312).

8. A multi-camera charging nest according to any one of claims 1 to 7, Features: The case comprises a case body (11), a left cover body (12) and a right cover body (13); the left cover body (12) and the right cover body (13) are respectively hinged to the case body (11) through a connecting rod assembly (14); a cover opening drive mechanism is arranged inside the case; the cover opening drive mechanism is transmission-connected to the connecting rod assembly (14); and the control circuit is transmission-connected to the cover opening drive mechanism.

9. A drone that can charge multiple cameras simultaneously. Features: The unmanned aerial vehicle comprises a fuselage (4), a positioning camera (41), a battery (42), a charging management circuit and a landing gear. The battery (42) and the charging management circuit are respectively installed on the fuselage (4). The battery (42) is electrically connected to the charging management circuit. The positioning camera (41) and the landing gear are respectively installed on the lower part of the fuselage (4). The landing gear comprises two cross bars (43) and at least two vertical bars (44), the upper ends of the two vertical bars (44) are respectively connected to the fuselage (4) of the UAV, the lower ends of the two vertical bars (44) are respectively connected to the corresponding two cross bars (43), the two cross bars (43) are spaced and arranged in parallel, the two vertical bars (44) and the two cross bars (43) are hollow tubular structures, at least one charging contact is respectively installed inside the two cross bars (43), the two charging contacts are respectively electrically connected to the charging management circuit, the charging contact is provided with an elastic ball (45), the elastic ball (45) extends out of the outer side of the cross bar (43), when the machine nest as described in any one of claims 1 to 8 charges the UAV, the landing gear is clamped between the passive fixing device (34) and the active fixing device (35), the two elastic balls (45) of the two charging contacts are respectively abutted against and electrically connected to the positive contact (32) and the negative contact (33).

10. A charging system for charging multiple cameras simultaneously. Features: It includes a cloud management server, multiple machine nests as described in any one of claims 1 to 8 and multiple drones as described in claim 9, the cloud management server is wirelessly connected to each of the machine nests and each of the drones through a cellular network, the drone receives the location information of adjacent machine nests through the cloud server and generates navigation data, and the machine nest receives the location information of nearby drones through the cloud server and starts a charging program.

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