WO2020051876A1

WO2020051876A1 - Liquid level measurement device, pesticide tank device and liquid filling device of unmanned aerial vehicle, and unmanned aerial vehicle

Info

Publication number: WO2020051876A1
Application number: PCT/CN2018/105724
Authority: WO
Inventors: 周万仁; 周乐
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2020-03-19
Also published as: CN110785639B; CN110785639A

Abstract

Disclosed are a liquid level measurement device (20), a pesticide tank device and a liquid filling device for an unmanned aerial vehicle, and an unmanned aerial vehicle (60, 60'). The liquid level measurement device (20) is provided with a buoy assembly (21) inside a water tank (10) and is provided with a non-contact measurement assembly (22) outside the water tank (10). The buoy assembly (21) comprises a buoy member (211) capable of moving as the liquid level changes. The non-contact measurement assembly (22) is arranged spaced apart from the buoy assembly (21). The position of the buoy member (211) can be sensed so as to determine the liquid level in the water tank (10). The present invention can realize accurate measurement of the liquid level in the water tank (10), simplify the structure of the liquid level measurement device (20) and facilitate rapid removal of the water tank (10).

Description

Liquid level measuring device, medicine box device, liquid adding device and unmanned aerial vehicle of drone

Technical field

The invention relates to the field of measurement, in particular to a liquid level measuring device, a medicine box device, a liquid adding device and an unmanned aerial vehicle of an unmanned aerial vehicle.

Background technique

With the continuous improvement of science and technology, unmanned aerial vehicles have appeared in more and more areas of people's work and life.

At present, unmanned aerial vehicles can be used for agricultural operations such as spraying or irrigation. Among them, the UAV can carry a water tank or a medicine tank, and spray and irrigate the farmland below during the flight. Among them, in order to monitor the remaining amount of liquid in the water tank, a liquid level sensor is usually provided in the water tank, and the liquid level sensor is connected to the frame of the unmanned aerial vehicle through a connection line such as a cable, so that the liquid detected by the liquid level sensor The position signal can be transmitted to the controller on the UAV, so that the operator knows the remaining amount of liquid in the water tank.

However, the liquid level sensor and the control circuit on the UAV's rack are usually connected by electrical connectors such as plugs, which is difficult to insert and remove, and it is difficult to quickly disassemble the water tank.

Summary of the Invention

The invention provides a liquid level measuring device, a medicine box device, a liquid adding device and an unmanned aerial vehicle for an unmanned aerial vehicle, which can realize the liquid level measurement, simplify the structure of the liquid level measuring device, and prevent the liquid level measuring device from interfering with the normal installation of the water tank. And disassembly.

In a first aspect, the present invention provides a liquid level measurement device for a drone, including a buoy assembly and a non-contact measurement assembly. The buoy assembly is configured to be installed in a water tank. The buoy assembly includes For a moving buoy, a non-contact measurement component can be placed outside the water tank and spaced from the buoy component. The non-contact measurement component is used to sense the position of the buoy and determine the liquid level in the water tank based on the position of the buoy.

In a second aspect, the present invention provides a drone medicine tank device, which includes a water tank, a fixed structure, and the above-mentioned liquid level measurement device. The fixed structure is located outside the water tank, and a non-contact measurement component in the liquid level measurement device is provided at the fixed position. Structurally.

In a third aspect, the present invention provides a drone medicine tank device, including a water tank for containing pesticides; and a buoy assembly disposed in the water tank, the buoy assembly including a buoy that can be moved as the liquid level in the water tank changes Pieces

Among them, the buoy component can cooperate with the non-contact measurement component located outside the water tank. The buoy component is spaced from the non-contact measurement component. The non-contact measurement component is used to sense the position of the buoy component and determine the water tank according to the position of the buoy component. The level of the internal liquid.

According to a fourth aspect, the present invention provides a liquid adding device for a drone, which includes a base, a liquid adding component, and a non-contact measurement component. The liquid adding component is installed on the base and is used for filling liquid into the medicine box device. The non-contact measurement component is connected to the base for detecting the liquid level in the water tank of the medicine tank device,

Among them, the non-contact measuring component is used to cooperate with the buoy component in the water tank. The buoy component is spaced from the non-contact measuring component. The buoy component includes a buoy piece that can move with the change of the liquid level in the water tank. The non-contact type The measuring component is used to sense the position of the buoy, and determine the liquid level of the liquid in the water tank according to the position of the buoy.

In a fifth aspect, the present invention provides an unmanned aerial vehicle, including a frame and the above-mentioned medicine box device, and a water tank of the medicine box device is detachably mounted on the frame.

According to a sixth aspect, the present invention provides an unmanned aerial vehicle, including a frame and the above-mentioned liquid adding device. The liquid adding device is located on the frame.

The invention provides a liquid level measuring device, a medicine box device, a liquid adding device and an unmanned aerial vehicle of an unmanned aerial vehicle. The liquid level measuring device is provided with a buoy component inside the water tank and a non-contact measurement component outside the water tank. The induction process between the magnetic part of the buoy component and the magnetic induction unit of the non-contact measurement component is used to realize the measurement of the liquid level in the water tank. The purpose is to use the magnetic field induction principle to avoid the setting of connecting wires in the buoy assembly and the non-contact measurement assembly, while measuring the liquid level in the water tank, and to prevent the liquid level measuring device from interfering with the normal installation and disassembly of the water tank. The structure of the bit measuring device is relatively simple.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a drone level measurement device according to a first embodiment of the present invention; FIG.

2 is a schematic structural diagram of a buoy assembly of a liquid level measuring device of a drone according to the first embodiment of the present invention;

3 is a schematic structural diagram of a buoy member of a liquid level measuring device of a drone according to the first embodiment of the present invention;

4 is a schematic structural diagram of a non-contact measurement component of a liquid level measurement device of a drone according to the first embodiment of the present invention;

5 is a schematic structural diagram of a state corresponding to a buoy and a magnetic induction unit of a liquid level measuring device of a drone according to a first embodiment of the present invention;

6 is a schematic structural diagram of a state where a buoy member and a magnetic induction unit of a drone liquid level measuring device are staggered from each other according to a first embodiment of the present invention;

7 is a front view of a medicine box device of a drone according to a second embodiment of the present invention;

8 is a side view of a medicine box device of a drone according to a second embodiment of the present invention;

9 is a schematic structural diagram of an unmanned aerial vehicle according to Embodiment 5 of the present invention;

FIG. 10 is a schematic structural diagram of an unmanned aerial vehicle according to Embodiment 6 of the present invention.

Reference sign description:

10—water tank; 20—level measuring device; 21—buoy assembly; 211—buoy parts; 211a—first end; 211b—horizontal shaft; 211c—second end; 212—bracket; 213—threaded fasteners; 22 — Non-contact measurement components; 221 — magnetic induction unit; 222 — support rod; 223 — lock nut; 30 — fixed structure; 40 — medicine box device; 50 — liquid adding device; 60, 60 '— unmanned aerial vehicle; 61, 61 '-fuselage; 62, 62'-arm.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Example one

FIG. 1 is a schematic structural diagram of a liquid level measuring device 20 of a drone according to the first embodiment of the present invention. Referring to FIG. 1, this embodiment provides a liquid level measurement device 20 for a drone. The liquid level measurement device 20 includes a buoy assembly 21 and a non-contact measurement component 22. The buoy assembly 21 is used to be disposed in a water tank 10. The buoy assembly 21 includes a buoy member 211 that can move as the liquid level in the water tank 10 changes. The non-contact measurement unit 22 can be located outside the water tank 10 and is spaced apart from the buoy assembly 21. The non-contact measurement unit 22 is used for The position of the liquid in the water tank 10 is determined based on the position of the buoy member 211 and the position of the buoy member 211.

Specifically, the water tank 10 can be used for containing water, medicinal liquid, or other liquids, and the liquid level measuring device 20 can be used to measure the liquid level in the water tank 10, for example, to measure the liquid level of the remaining liquid in the water tank 10, Or the change of the liquid level in the water tank 10 and the like. The buoy assembly 21 is located inside the water tank 10. The buoy assembly 21 may be installed on the inner wall of the water tank 10, or may be disposed in the inner cavity of the water tank 10 and spaced a certain distance from the inner wall of the water tank 10. The non-contact measurement component 22 is located outside the water tank 10 and may be disposed at a distance from the outer wall of the water tank 10. In this way, there is always a space between the non-contact measurement component 22 and the buoy component 21, and the distance between the two depends on the different structures and installation methods of the buoy component 21 and the non-contact measurement component 22. Because a certain distance is maintained between the buoy assembly 21 and the non-contact measurement assembly 22, the non-contact measurement assembly 22 does not interfere with the structure of the water tank 10 and the disassembly process of the water tank 10; at the same time, the buoy assembly 21 and the non-contact The type measurement components 22 do not need to be connected through any connecting wires, which simplifies the installation process of the two and the overall structure of the liquid level measurement device 20.

The buoy member 211 in the buoy assembly 21 may be placed in the liquid of the water tank 10. The average density of the buoy member 211 will generally be less than or equal to the density of the liquid in the water tank 10, so that when the water tank 10 has liquid, the buoy member 211 will be lifted by the liquid under the action of liquid buoyancy and will float or float on the liquid surface accordingly. Liquid inside. At this time, the vertical height of the buoy member 211 changes correspondingly with the change of the liquid level. Generally, the average density of the buoy member 211 is generally smaller than the liquid density in the water tank 10, so that the buoy member 211 floats on the liquid surface, and thus the position of the buoy member 211 in the vertical direction changes directly with the change of the liquid surface height.

The average density of the buoy member 211 is less than or equal to the liquid density. Generally, the buoy member 211 is made of a material with a density less than or equal to the liquid density. The buoy member 211 is made of a material with a density greater than the liquid density. 211 has a structure such as a hollow cavity that can reduce its average density.

Optionally, the sensing method of the non-contact measurement component 22 provided in this embodiment may include any one of the following sensing: magnetic field sensing, electric field sensing, and optical sensing.

It should be noted that, as an implementable implementation manner, the induction method of the non-contact measurement component 22 may be electric field induction. In this case, the non-contact measurement component 22 may include an electric field induction detector and electric field data. A processor, the electric field induction detector is used to sense an electric field generated by a power device and output an electric field signal; the electric field data processor is used to receive the electric field signal and calculate an electric field value; and output the electric field change signal after being compared with a preset electric field threshold. The buoy assembly 21 may include a consumer for changing the electric field value. When the height of the buoy assembly 21 changes, the electric field induction is a corresponding change in the electric field intensity generated by the electrical appliances detected by the detector. The electric field data processor obtains the electric field signal and generates an electric field change signal. According to the electric field change signal, it can be judged The height of the buoy assembly 21 changes to determine the specific value of the liquid level of the water tank 10.

As another achievable implementation manner, the sensing method of the non-contact measurement component 22 may be optical sensing. In this case, the non-contact measurement component 22 may include an optical sensor, which is used to capture the environment. Rays of light. The buoy assembly 21 may include a light emitter for emitting light of a preset wavelength to the environment. At this time, a photosensitive window is provided on the side wall of the water tank 10 for light to pass through. When the height of the liquid level in the water tank 10 changes, the height of the buoy assembly 21 changes accordingly, and the light emitted by the light transmitter can be transmitted through the photosensitive window. The optical sensor captures the liquid level of the water tank 10 and determines the specific value of the water level of the water tank 10.

As another implementable implementation manner, the induction method of the non-contact measurement component 22 in this embodiment may also be magnetic field induction. In this case, the non-contact measurement component 22 includes at least one magnetic induction unit 221. The magnetic induction unit 221 may be disposed at any height outside the water tank 10. The buoy member 211 may include a magnetic portion having magnetic properties. When the liquid level in the water tank 10 changes, the height of the buoy member 211 changes with the liquid level, and the distance between the magnetic portion and the magnetic induction unit 221 changes, so that the magnetic field strength of the magnetic portion induced by the magnetic induction unit 221 occurs. Corresponding to the change, the non-contact measurement component 22 can determine the change of the liquid level according to the changed magnetic field strength, thereby confirming the specific value of the liquid level in the water tank 10.

Wherein, when the non-contact measurement component 22 uses magnetic field induction to obtain the position of the buoy member 211 in the buoy component 21, optionally, the non-contact measurement component 22 may further include at least two magnetic induction units 221 with different magnetic induction. The units 221 are located at different height positions of the water tank 10. For example, at least two magnetic induction units 221 may be respectively arranged at the vertical heights corresponding to any position on the bottom, middle or top of the water tank 10, and the specific settings may be set as required. This embodiment does not address this. It is not limited to the above examples. The height of the buoy member 211 changes with the liquid level. For example, when the liquid level is at the first height, the first magnetic induction unit located at the first height senses the magnetic part of the buoy member 211 to determine the height of the liquid level. When reaching the second height, the buoy member 211 descends accordingly, and the magnetic part of the buoy member 211 leaves the sensing range of the first magnetic sensing unit and enters the sensing range of the second magnetic sensing unit at the second height. The second magnetic sensing The unit senses the magnetic part of the buoy member 211 to determine the specific value of the liquid level.

Further, at least two magnetic induction units 221 may be arranged at intervals in the vertical direction. Because the change of the liquid level is mainly reflected in the change in the vertical height, the magnetic induction units 221 may be arranged along the vertical direction. At least two of the magnetic induction units 221 may be located on the same vertical straight line to simplify the installation process of the magnetic induction unit 221 and facilitate the induction of the buoy member 211. In actual use, the number of magnetic induction units 221 and the distance between adjacent magnetic induction units 221 can be set as required, which is not limited in this embodiment.

As an implementable embodiment, the magnetic induction unit 221 includes any one of the following: a Hall sensor and a magnetic switch. The Hall sensor is based on the Hall magnetoelectric effect. The Hall voltage generated inside the Hall sensor changes accordingly with the change of the magnetic field strength of the environment. It can be achieved by analyzing the voltage in the induction circuit in the non-contact measurement component 22. The purpose of judging the change of the magnetic field in the environment. The magnetic switch uses the magnetic field signal in the environment to control the on-off of the induction circuit in the non-contact measurement component 22. By analyzing the current of the induction circuit, the purpose of judging the change of the magnetic field in the environment can be achieved.

Specifically, the magnetic induction unit 221 may be attached to the outer wall of the water tank 10 and installed on the outer wall of the water tank 10, or may be kept at a certain distance from the outer wall of the water tank 10. Wherein, when the magnetic induction unit 221 is installed on the outer wall of the water tank 10, it can be detachably connected to the outer wall of the water tank 10, for example, one or more of connection methods such as screw connection, pin connection, or snap connection, This connection method is convenient for installing or removing the magnetic induction unit 221 to the water tank 10. In actual use, the above-mentioned connection manner may be selected according to requirements, which is not limited in this embodiment.

FIG. 4 is a schematic structural diagram of a non-contact measurement component of a drone level measurement device according to a first embodiment of the present invention. As shown in FIG. 4, the non-contact measurement component 22 may also be disposed on the outer wall of the water tank 10 through a support rod 222. Specifically, the center axis of the support rod 222 may be located in a vertical direction, and the magnetic induction unit 221 is along the support rod 222. The extending direction of the magnetic induction unit 221 is spaced apart. The magnetic induction unit 221 may be connected to the support rod 222 through a threaded fastener 213, and the threaded fastener 213 may be a lock nut 223. In order to easily adjust the specific installation height of the magnetic induction unit 221 on the supporting rod 222, an oblong hole can be provided on the supporting rod 222. The aperture of the oblong hole extends in the vertical direction. The lock nut 223 passes through the oblong hole to connect the magnetic induction unit 221. On the support rod 222, the purpose of adjusting the installation height of the magnetic induction unit 221 can be achieved by adjusting the installation position of the lock nut 223 in the long circular hole.

Wherein, the buoy member 211 may be a magnetic part for sensing by the magnetic induction unit 221, or the entire buoy member 211 may be a magnetic member. In order to facilitate the processing of the buoy member 211, the entire buoy member 211 may be made of a magnetic material, wherein a region of the buoy member 211 near the magnetic induction unit 221 forms a magnetic portion. The magnetic material may be a ferromagnetic material, a ferrite material, a nickel-based alloy material, or the like.

Specifically, the number of the buoy pieces 211 is at least one. At least one buoy member 211 is provided inside the water tank 10. When the liquid level in the water tank 10 changes, the height of the buoy member 211 changes accordingly. When the magnetic part of the buoy member 211 is located on or off of a magnetic induction unit 221, the magnetic induction unit 221 is determined according to the change of the magnetic field strength. The position of the buoy member 211 determines the height of the liquid level.

Further, as an optional implementation manner, the number of the buoy pieces 211 is at least two, and different buoy pieces 211 are located at different height positions in the water tank 10. At least two buoy pieces 211 are located at different height positions of the water tank 10. At this time, the magnetic parts of different buoy pieces 211 may correspond to different magnetic induction units 221. When the liquid level in the water tank 10 changes, the height of the buoy member 211 near the liquid level changes accordingly, and the corresponding magnetic induction unit 221 can sense the magnetic field change of the magnetic part of the buoy member 211, thereby determining the level of the liquid level. specific value.

When the number of the buoy pieces 211 is two or more, at least two buoy pieces 211 may be arranged at intervals in the vertical direction. Because the change of the liquid level is reflected in the vertical height, at least two buoy pieces 211 can be arranged at intervals in the vertical direction, and at least two buoy pieces 211 can be located on the same vertical line to simplify the installation process of the buoy pieces 211. At the same time, it is convenient to be disposed opposite to the magnetic induction unit 221. In actual use, the number of buoy pieces 211 and the distance between adjacent buoy pieces 211 can be set as required, which is not limited in this embodiment.

Specifically, FIG. 2 is a schematic structural diagram of a buoy assembly of a liquid level measuring device of a drone according to the first embodiment of the present invention. 3 is a schematic structural diagram of a buoy member of a liquid level measuring device of a drone according to the first embodiment of the present invention. Referring to FIG. 2 and FIG. 3, as an optional structure, the buoy assembly 21 may further include a bracket 212, and the buoy member 211 is rotatably connected to the bracket 212 through a horizontal rotation shaft 211 b. A central axis of the bracket 212 may be located in a vertical direction, and at least two buoy pieces 211 may be mounted on the bracket 212 at intervals. The axis of the horizontal rotation shaft 211b used to install the buoy member 211 may be set perpendicular to the center axis of the bracket 212. When the liquid level near the buoy member 211 changes, the buoy member 211 acts along the horizontal rotation axis under the action of buoyancy and its own gravity. The rotation of 211b causes the magnetic part of the buoy member 211 to move, resulting in a corresponding change in the magnetic field sensed by the magnetic induction unit 221 corresponding to the buoy member 211, and the specific value of the liquid level is determined accordingly.

Further, the bracket 212 is detachably connected to the water tank 10. For example, as an implementable embodiment, the bracket 212 may be connected to the inner wall of the water tank 10 through a threaded fastener 213. There may be multiple threaded fasteners 213, and the plurality of threaded fasteners 213 are spaced apart along the extending direction of the bracket 212, respectively. Distribution, which can improve the installation stability of the bracket 212 on the inner wall of the water tank 10. As another achievable implementation manner, the bracket 212 can also be engaged with the inner wall of the water tank 10. The bracket 212 may be provided with one of the buckle and the groove, and the inner wall of the water tank 10 may be provided with the other of the buckle and the groove. The bracket 212 is installed in the water tank 10 by using the relationship between the buckle and the groove. For the installation of the bracket, a plurality of corresponding buckles and grooves may also be provided, which are arranged at intervals along the length of the bracket 212 or the depth direction of the inner wall of the water tank 10, thereby improving the mounting stability of the bracket 212 on the inner wall of the water tank 10.

Optionally, as shown in FIG. 3, FIG. 3 is a detailed diagram of part A in FIG. 1. The horizontal rotation shaft 211b may be connected to the middle of the buoy member 211, so that both ends of the buoy member 211 can rotate synchronously along the horizontal rotation shaft 211b when the liquid level changes. Specifically, the first end 211a of the buoy member 211 is used to generate buoyancy when it contacts the liquid in the water tank 10, the second end 211c of the buoy member 211 is magnetic, and the second end 211c of the buoy member 211 and the inner wall of the water tank 10 The distance between them is smaller than the distance between the first end 211 a of the buoy member 211 and the inner wall of the water tank 10. The second end 211c of the buoy member 211 is magnetic and forms a magnetic portion. When the distance between the second end 211c of the buoy member 211 and the inner wall of the water tank 10 is smaller than the distance between the first end 211a of the buoy member 211 and the inner wall of the water tank 10 When the distance is reached, it can be ensured that the magnetic second end 211c is always arranged close to the magnetic induction unit 221, so that when the position of the magnetic field part changes, the magnetic induction unit 221 can accurately sense the change of the magnetic field, thereby improving the induction accuracy of the magnetic induction unit 221 .

As an implementable embodiment, FIG. 5 is a schematic structural diagram of a state corresponding to a buoy and a magnetic induction unit of a liquid level measuring device of a drone according to a first embodiment of the present invention. FIG. 6 is a schematic structural diagram of a state where a buoy member and a magnetic induction unit of a drone liquid level measuring device of the first embodiment of the present invention are staggered from each other. As shown in FIG. 6, FIG. 6 is a detailed view of a state in which the buoy member and the magnetic induction unit of part B in FIG. 2 are staggered from each other. The two magnetic poles of the second end 211 c of the buoy member 211 are disposed toward the magnetic induction unit 221. When the first end 211a is inclined downward, the second end 211c of the buoy member 211 and the magnetic induction unit 221 are staggered from each other. The magnetic part of the second end 211c of the buoy member 211 may be a magnet. The magnet includes two opposite magnetic poles, and the two magnetic poles are distributed on both sides of the magnet in a vertical direction. When the first end 211a of the buoy member 211 is inclined downward, one of the magnetic poles of the second end 211c of the buoy member 211 is exactly opposite to the magnetic induction unit 221, and the other magnetic pole and the magnetic induction unit 221 are staggered from each other. Referring to FIG. 5, FIG. 5 is a detailed view of the corresponding state of the buoy member and the magnetic induction unit in part B in FIG. 2. When the first end 211 a of the buoy member 211 gradually floats, the position and magnetic properties of the second end 211 c of the buoy member 211. The position of the sensing unit 221 gradually corresponds until the buoy member 211 is in a horizontal state. At this time, the two magnetic poles of the second end 211c of the buoy member 211 are just staggered from the magnetic sensing unit 221. The deviation from each other may mean that the magnetic pole of the buoy member 211 and the magnetic induction unit 221 are not at the same vertical height, or the magnetic pole of the buoy member 211 is not directly opposite the sensing end of the magnetic induction unit 221. The corresponding situation is exactly the opposite of the above-mentioned mutually staggered situation, which is not repeated here. In the above case, when the magnetic induction unit 221 senses that the magnetic field strength becomes strong, it can be confirmed that the liquid level is lower or higher than the height of the buoy member 211. When the magnetic induction unit 221 senses that the magnetic field strength is weak, it can be confirmed that the liquid level is equal to the height of the buoy member 211. The above-mentioned induction process is realized by a magnetic field, so there is no need to provide a connecting wire between the buoy assembly 21 and the non-contact measurement assembly 22, so that the liquid level in the water tank 10 can be measured while the liquid level measurement device 20 is prevented from interfering with Normal installation and removal of the water tank 10.

As another implementable embodiment, when the buoy member 211 is in a horizontal state, only one magnetic pole of the two magnetic poles of the second end 211c of the buoy member 211 corresponds to the position of the magnetic induction unit 221; When the end 211a floats or sinks, both magnetic poles of the second end 211c of the buoy member 211 are staggered from the magnetic induction unit 221. In this case, when the magnetic field intensity induced by the magnetic induction unit 221 becomes weak, it can be confirmed that the liquid level is higher or lower than the height of the buoy member 211, and when the magnetic field intensity induced by the magnetic induction unit 221 becomes strong, the Confirm that the liquid level is substantially equal to the height of the buoy member 211. The specific reason and analysis process are contrary to the above situation, and you can refer to it accordingly, and will not repeat them here.

Specifically, in order to generate buoyancy at the first end 211a of the buoy member 211, the buoy member 211 may also have a variety of different structures. For example, optionally, the first end 211 a of the buoy member 211 may have a closed hollow cavity, and the density of the medium in the hollow cavity is smaller than the density of the liquid in the water tank 10. Setting the first end 211a of the buoy member 211 as a closed hollow cavity can reduce the weight of the first end 211a of the buoy member 211, and fill a medium with a density less than the liquid density therein, so that when the buoy member 211 is in the liquid, The first end 211a of the first end 211a can be floated under buoyancy. As an optional implementation manner, the hollow cavity is a vacuum cavity or filled with air. Compared with the rest of the filled medium, the cost of filling air or maintaining a vacuum state is lower. This setting method can meet the buoyancy requirements of the buoy member 211. The production cost of the buoy member 211 can also be reduced.

In addition, the first end 211a of the buoy member 211 may also be made of a material with a lower density (the density is less than the liquid density), or other structures capable of generating buoyancy are provided, which are not limited here.

Among them, since the magnetic part in the buoy member 211 is generally of large mass, in order to allow the magnetic part to move under the buoyancy of the first end 211a of the buoy member 211, optionally, the first end 211a of the buoy member 211 to the horizontal rotation axis The distance of 211b is greater than the distance of the second end 211c of the buoy member 211 to the horizontal rotation shaft 211b. Because the first end 211a of the buoy member 211 is a hollow end or filled with a medium having a density lower than the liquid density, and the second end 211c of the buoy member 211 is a magnetic portion, the second end 211c of the buoy member 211 is heavier than the first end 211a. To prevent the first end 211a of the buoy member 211 from moving the second end 211c under buoyancy, the distance between the first end 211a of the buoy member 211 and the horizontal rotation axis 211b may be set larger than that of the second end 211c and the horizontal rotation axis. The distance of 211b. According to the principle of the lever, the above setting method can ensure that the moment of the first end 211a of the buoy member 211 and the moment of the second end 211c of the buoy member 211 are approximately equal, so that the first end 211a of the buoy member 211 acts in buoyancy It can drive the second end 211c to rotate synchronously.

As an implementable embodiment, the distance from the first end 211a of the buoy member 211 to the horizontal rotation axis 211b is 2-4 times the distance from the second end 211c of the buoy member 211 to the horizontal rotation axis 211b. In actual use, the distance from the first end 211a of the buoy member 211 to the horizontal rotation shaft 211b and the distance from the second end 211c of the buoy member 211 to the horizontal rotation shaft 211b may be required, or according to the weight of the first end 211a of the buoy member 211 and the buoy The weight of the second end 211c of the piece 211 is set.

In the liquid level measuring device provided in this embodiment, a buoy assembly is provided in the water tank, and a non-contact measurement unit is provided outside the water tank. The induction process between the magnetic part of the buoy assembly and the magnetic induction unit of the non-contact measurement unit is used. The purpose of measuring the liquid level of the water tank is achieved, wherein the principle of magnetic field induction can be used to avoid setting connection wires between the buoy component and the non-contact measuring component, while measuring the liquid level in the water tank, and preventing the liquid level measuring device from interfering with the normal of the water tank Installation and removal, while the structure of the liquid level measuring device is relatively simple.

Example two

Specifically, FIG. 7 is a front view of the medicine box device of the drone according to the second embodiment of the present invention. FIG. 8 is a side view of the medicine box device of the drone according to the second embodiment of the present invention. Referring to FIG. 7 and FIG. 8, the second embodiment of the present invention also provides a medicine tank device of an unmanned aerial vehicle, which includes a water tank, a fixed structure 30 and a liquid level measuring device as in the first embodiment, wherein the water tank and the liquid level The structure, working principle, and effect of the measurement device have been described in detail in the foregoing first embodiment, and are not repeated here.

Specifically, referring to FIGS. 1-6 in the first embodiment and FIGS. 7 and 8 in the present embodiment, the fixed structure 30 is located outside the water tank 10, and the non-contact measurement component 22 in the liquid level measurement device 20 is disposed on the fixed structure. 30 on. The fixing structure 30 may include a plurality of fixing brackets, and a plurality of fixing brackets surround a mounting area for receiving the water tank 10. The non-contact measurement component 22 located outside the water tank 10 may be disposed on the fixed structure 30, which may be detachably connected to the fixed bracket, for example, the two may be connected by a threaded fastener 213, and the threaded fasteners 213 are arranged at intervals. On the connection surface of the two, the installation stability of the non-contact measurement component 22 on the fixed structure 30 is improved.

The water tank 10 may also be detachably disposed on the fixed structure 30. For example, the water tank 10 can be installed on the fixing bracket of the fixing structure 30 through one of screw connection, pin connection and snap connection. This detachable installation manner can simplify the installation and removal process of the water tank 10.

Specifically, the water tank 10 is placed on the fixed structure 30. In order to realize the placement of the water tank 10, the installation area surrounded by the fixing bracket may include a platform part for placing the water tank 10, the water tank 10 is placed above the platform part, and the platform part is used to carry the main weight of the water tank 10, and on this basis, The installation area may further include a fixing bracket connected to the platform portion around the water tank 10, and the fixing bracket is used for fixing the periphery of the water tank 10 to prevent the water tank 10 from tilting or falling off the platform portion during use.

Further, in order to facilitate the installation of the buoy assembly 21, the water tank 10 has an opening. The buoy assembly 21 in the liquid level measuring device 20 is installed in the water tank 10 through the opening. The opening can be provided on the top of the water tank 10, and the opening can also be used as the water tank 10. In order to prevent the liquid from leaking out of the water tank 10 during use, a cap may be further provided on the opening.

The medicine tank device of the drone provided in this embodiment includes a water tank and a liquid level measuring device. The liquid level measuring device is provided with a buoy assembly in the water tank, a non-contact measurement component outside the water tank, and a magnetic part of the buoy assembly. The induction process between the sensor and the magnetic induction unit of the non-contact measurement component achieves the purpose of measuring the liquid level of the water tank. Among them, the use of the magnetic field induction principle can avoid setting connection wires in the buoy component and the non-contact measurement component to prevent liquid liquid in the water tank. While measuring the position, the liquid level measuring device is prevented from interfering with the normal installation and removal of the water tank, and the structure of the liquid level measuring device is relatively simple.

Example three

The third embodiment of the present invention also provides a drone medicine box device. The medicine box device includes a water tank. The structure of the water tank has been described and shown in the first embodiment and FIGS. 1-6, as shown in FIGS. 1 to 6. As shown, the water tank 10 of the medicine tank device is used for containing pesticides; and a buoy assembly 21 is disposed in the water tank 10, and the buoy assembly 21 includes a buoy member 211 that can be moved as the liquid level in the water tank 10 changes; The component 21 can cooperate with the non-contact measurement component 22 located outside the water tank 10. The buoy component 21 is spaced from the non-contact measurement component 22. The non-contact measurement component 22 is used for sensing the position of the buoy component 211 and according to the buoy component. The position of 211 determines the liquid level of the liquid in the water tank 10.

The buoy member 211 in the buoy assembly 21 is placed in the liquid of the water tank 10, and the structures of the buoy member 211 and the non-contact measurement module 22 have been described in detail in the first embodiment, and will not be repeated here. When the liquid level in the water tank 10 changes, the buoy member 211 floats on the surface of the liquid, so that its vertical position can change directly with the change in the height of the liquid surface. The non-contact measurement component 22 senses the buoy member 211. After the position of the valve changes, the specific value of the liquid level in the water tank 10 is confirmed accordingly.

In order to facilitate the installation of the buoy assembly 21, the water tank 10 has an opening, and the buoy assembly 21 in the liquid level measuring device 20 is installed in the water tank 10 through the opening. The specific position of the opening has been described in detail in the second embodiment, and is not repeated here.

Further, as an optional implementation manner, the number of the buoy pieces 211 is at least two, and different buoy pieces 211 are located at different height positions in the water tank 10. At least two buoy pieces 211 are located at different height positions of the water tank 10. At this time, the magnetic parts of different buoy pieces 211 may correspond to different magnetic induction units 221.

When the number of the buoy pieces 211 is two or more, at least two buoy pieces 211 may be arranged at intervals in the vertical direction.

As an optional structure, the buoy assembly 21 further includes a bracket 212, and the buoy member 211 is rotatably connected to the bracket 212 through a horizontal rotation shaft 211b. The central axis of the bracket 212 may be located in a vertical direction. At least two buoy members 211 may be mounted on the bracket 212 at intervals. The axis of the horizontal rotation shaft 211b for mounting the buoy member 211 may be perpendicular to the central axis of the bracket 212.

The bracket 212 is detachably connected to the water tank 10. For example, as an implementable embodiment, the bracket 212 may be connected to the inner wall of the water tank 10 through a threaded fastener 213, or connected to the inner wall of the water tank 10 through a clip. In actual use, the specific connection method may be set as required. .

Optionally, the horizontal rotating shaft 211b is connected to the middle of the buoy member 211, so that the two ends of the buoy member 211 can rotate synchronously along the horizontal rotating shaft 211b when the liquid level changes. Specifically, the first end 211a of the buoy member 211 is used to generate buoyancy when it contacts the liquid in the water tank 10, the second end 211c of the buoy member 211 is magnetic, and the second end 211c of the buoy member 211 and the inner wall of the water tank 10 The distance between them is smaller than the distance between the first end 211 a of the buoy member 211 and the inner wall of the water tank 10. The second end 211c of the buoy member 211 is magnetic and forms a magnetic portion. When the distance between the second end 211c of the buoy member 211 and the inner wall of the water tank 10 is smaller than the distance between the first end 211a of the buoy member 211 and the inner wall of the water tank 10 When the distance is reached, it can be ensured that the magnetic second end 211c is always arranged close to the magnetic induction unit 221, so that when the position of the magnetic field part changes, the magnetic induction unit 221 can accurately sense the change of the magnetic field, thereby improving the induction accuracy of the magnetic induction unit 221 .

As an implementable embodiment, when the first end 211a of the buoy member 211 does not generate buoyancy, the second end 211c of the buoy member 211 and the magnetic induction unit 221 are staggered from each other; when the first end 211a of the buoy member 211 generates buoyancy, The position of the second end 211c of the buoy member 211 corresponds to the position of the magnetic induction unit 221. The above-mentioned induction process is realized by a magnetic field, so there is no need to provide a connecting wire between the buoy assembly 21 and the non-contact measurement assembly 22, so that the liquid level in the water tank 10 can be measured while the liquid level measurement device 20 is prevented from interfering with Normal installation and removal of the water tank 10.

As another achievable implementation, contrary to the above, when the first end 211a of the buoy member 211 does not generate buoyancy, the position of the second end 211c of the buoy member 211 corresponds to the position of the magnetic induction unit 221; When the first end 211a of 211 generates buoyancy, the second end 211c of the buoy member 211 and the magnetic induction unit 221 are staggered from each other.

Specifically, in order to generate buoyancy at the first end 211a of the buoy member 211, the buoy member 211 may also have a variety of different structures. For example, optionally, the first end 211 a of the buoy member 211 may have a closed hollow cavity, and the density of the medium in the hollow cavity is smaller than the density of the liquid in the water tank 10. As an optional embodiment, the hollow cavity is a vacuum cavity or filled with air.

Among them, since the magnetic part in the buoy member 211 is generally of large mass, in order to allow the magnetic part to move under the buoyancy of the first end 211a of the buoy member 211, optionally, the first end 211a of the buoy member 211 to the horizontal rotation axis The distance of 211b is greater than the distance of the second end 211c of the buoy member 211 to the horizontal rotation shaft 211b. According to the principle of the lever, it can be known that the above setting method can ensure that the moment of the first end 211a of the buoy member 211 and the moment of the second end 211c of the buoy member 211 are substantially equal, so that the first end 211a of the buoy member 211 can drive the first The two ends 211c rotate synchronously.

Embodiment 4

The fourth embodiment of the present invention also provides a liquid adding device for an unmanned aerial vehicle, which includes a base, a liquid adding component and a non-contact measurement component. The liquid adding component is installed on the base and is used for filling liquid into the medicine box device. The non-contact measuring component is connected to the base for detecting the liquid level in the water tank of the medicine tank device. The structure, function, and working principle of the non-contact measurement component and the water tank in the medicine tank device have been described in detail in the first embodiment, and the specific structures thereof can be referred to FIG. 1 to FIG. 6.

Generally, the liquid adding assembly may include a liquid adding pipe and a liquid storage tank. The liquid storing tank communicates with the water tank 10 of the medicine tank device through the liquid adding pipe, and a valve for controlling the opening and closing of the liquid adding pipe may be provided on the liquid adding pipe, using The valve controls the transfer of the liquid in the liquid storage tank to the water tank 10. When the dosing device is working, the non-contact measurement component 22 is used to sense the position of the buoy member 211 in the water tank 10 to determine the specific liquid level in the water tank 10. When the liquid level is lower than the first preset liquid level, the The liquid in the liquid storage tank is transferred to the water tank 10 by opening the valve on the liquid adding pipe. In order to avoid excessive liquid transfer in the water tank 10, during the transfer process, the position of the buoy member 211 can be sensed in real time by the non-contact measurement component 22, so as to determine the liquid level change of the water tank 10, when the liquid level in the water tank 10 is higher than At the second preset liquid level, the valve in the liquid adding pipeline can be closed to stop the liquid in the liquid storage tank from being transferred to the water tank 10. By setting the non-contact measurement component 22, the buoy component 21 can provide a liquid adding basis for the liquid adding device, and avoid too little or too much liquid in the water tank 10.

Further, the base in the liquid adding device may include the fixed structure 30 in the second embodiment, and the manner and function of the fixed structure 30 have been described in the second embodiment, and will not be repeated here.

On this basis, in order to facilitate the effective control of the dosing device, the dosing device further includes a controller, and the non-contact measurement component 22 in the dosing component and the medicine tank device are electrically connected to the controller. The liquid level detected by the non-contact measuring component 22 controls the working state of the liquid adding component. Specifically, the controller is electrically connected to the non-contact measurement component 22 and can obtain real-time data of the liquid level in the water tank 10. The controller can be electrically connected to the valve on the liquid feeding pipe of the liquid feeding component, so that the valve can be opened or closed in real time remotely or locally. Using the controller to obtain real-time data of the liquid level in the water tank 10, and controlling the opening and closing of the valve accordingly, the working efficiency of the liquid adding component can be effectively improved.

In order to simplify the installation and removal process of the water tank 10, the water tank 10 can be detachably connected to the base with bare hands. Specifically, the base may include the fixed structure 30 in the second embodiment, and referring to FIGS. 7 and 8 in the second embodiment, the water tank 10 is placed on the platform portion of the fixed structure 30 by using the fixing around the platform portion. The bracket fixes the periphery of the water tank 10 to complete the installation, and the disassembly process is the opposite, which is not repeated here. Such a structure can facilitate quick disassembly of the water tank 10.

Optionally, the induction method of the non-contact measurement component 22 may include any one of the following inductions: magnetic field induction, electric field induction, and optical induction. The principles of the above three sensing methods have been described in detail in the first embodiment, which is not described in this embodiment.

As another implementable implementation manner, the induction method of the non-contact measurement component 22 in this embodiment may also be magnetic field induction. In this case, the non-contact measurement component 22 includes at least one magnetic induction unit 221. The magnetic induction unit 221 can be arranged at any height outside the water tank 10.

Wherein, when the non-contact measurement component 22 obtains the position of the buoy member 211 in the buoy component 21 by means of magnetic field induction, optionally, the non-contact measurement component 22 includes at least two magnetic induction units 221, and different magnetic induction units 221 Located at different height positions of the water tank 10. The specific setting position of the magnetic induction unit 221 can be set as required, which is not limited in this embodiment.

Further, at least two magnetic induction units 221 are arranged at intervals in the vertical direction. Because the change of the liquid level is mainly reflected in the change in the vertical height, the magnetic induction units 221 may be arranged along the vertical direction. At least two of the magnetic induction units 221 may be located on the same vertical straight line to simplify the installation process of the magnetic induction unit 221 and facilitate the induction of the buoy member 211. In actual use, the number of magnetic induction units 221 and the distance between adjacent magnetic induction units 221 can be set as required, which is not limited in this embodiment.

As an implementable embodiment, the magnetic induction unit 221 includes any one of the following: a Hall sensor and a magnetic switch. The working principle of the Hall sensor and the magnetic switch has been described in detail in the first embodiment, which is not described in this embodiment.

Specifically, the magnetic induction unit 221 may be attached to the outer wall of the water tank 10 and installed on the outer wall of the water tank 10, or may be kept at a certain distance from the outer wall of the water tank 10. Wherein, when the magnetic induction unit 221 is installed on the outer wall of the water tank 10, it can be detachably connected to the outer wall of the water tank 10. This connection method is convenient for installing or removing the magnetic induction unit 221 to the water tank 10 .

Wherein, the buoy member 211 may be a magnetic part for sensing by the magnetic induction unit 221, or the entire buoy member 211 may be a magnetic member.

When the number of the buoy pieces 211 is two or more, at least two buoy pieces 211 may be arranged at intervals in the vertical direction. Because the change of the liquid level is reflected in the vertical height, at least two buoy pieces 211 can be arranged at intervals in the vertical direction, and at least two buoy pieces 211 can be located on the same vertical line to simplify the installation process of the buoy pieces 211. At the same time, it is convenient to be disposed opposite to the magnetic induction unit 221.

As an optional structure, the buoy assembly 21 may further include a bracket 212, and the buoy member 211 is rotatably connected to the bracket 212 through a horizontal rotation shaft 211b. A central axis of the bracket 212 may be located in a vertical direction, and at least two buoy pieces 211 may be mounted on the bracket 212 at intervals. The axis of the horizontal rotation shaft 211 b for mounting the buoy member 211 may be perpendicular to the central axis of the bracket 212.

Optionally, the horizontal rotating shaft 211b is connected to the middle of the buoy member 211, so that the two ends of the buoy member 211 can rotate synchronously along the horizontal rotating shaft 211b when the liquid level changes. Specifically, the first end 211a of the buoy member 211 is used to generate buoyancy when it contacts the liquid in the water tank 10, the second end 211c of the buoy member 211 is magnetic, and the second end 211c of the buoy member 211 and the inner wall of the water tank 10 The distance between them is smaller than the distance between the first end 211 a of the buoy member 211 and the inner wall of the water tank 10.

As an implementable embodiment, when the first end 211a of the buoy member 211 is inclined downward, one of the magnetic poles of the second end 211c of the buoy member 211 and the magnetic induction unit 221 are staggered from each other, and the other magnetic pole and the magnetic induction unit 221 are staggered. Opposite; the first end 211a of the buoy member 211 gradually floats until it is in a horizontal state. At this time, the two magnetic poles of the second end 211c of the buoy member 211 are just staggered from the positions of the magnetic induction unit 221. The above-mentioned induction process is realized by a magnetic field, so there is no need to provide a connecting wire between the buoy assembly 21 and the non-contact measurement assembly 22, so that the liquid level in the water tank 10 can be measured while the liquid level measurement device 20 is prevented from interfering with Normal installation and removal of the water tank 10.

As another implementable embodiment, contrary to the above, when the first end 211a of the buoy member 211 is in a horizontal state, one of the magnetic poles of the second end 211c of the buoy member 211 and the magnetic induction unit 221 are staggered from each other, and the other The magnetic pole is exactly opposite to the inside of the magnetic induction unit 221. When the first end 211a of the buoy member 211 floats or sinks, the two magnetic poles of the second end 211c of the buoy member 211 are staggered from the position of the magnetic induction unit 221. The specific process has been described in detail in the first embodiment.

Specifically, in order to generate buoyancy at the first end 211a of the buoy member 211, the buoy member 211 may also have a variety of different structures. For example, optionally, the first end 211 a of the buoy member 211 has a closed hollow cavity, and the density of the medium in the hollow cavity is less than the density of the liquid in the water tank 10. As an optional embodiment, the hollow cavity is a vacuum cavity or filled with air.

Among them, since the magnetic part in the buoy member 211 is generally of large mass, in order to allow the magnetic part to move under the buoyancy of the first end 211a of the buoy member 211, optionally, the first end 211a of the buoy member 211 to the horizontal rotation axis The distance of 211b is greater than the distance of the second end 211c of the buoy member 211 to the horizontal rotation shaft 211b.

The liquid adding device of the drone provided in this embodiment. The liquid adding device includes a controller, a liquid adding component and a medicine tank device, wherein the liquid level measuring device in the medicine tank device can set a buoy component in the water tank, a non-contact measuring component outside the water tank, and use the magnetic part of the buoy component. The induction process with the magnetic induction unit of the non-contact measurement component achieves the purpose of measuring the liquid level of the water tank, which is convenient for the liquid adding device to add liquid to the water tank in time. Among them, the principle of magnetic field induction can be used to avoid buoy components and non-contact measurement. The component is provided with a connecting wire to prevent the liquid level measuring device from interfering with the normal installation and removal of the water tank while measuring the liquid level in the water tank, and the structure of the liquid level measuring device is relatively simple.

Example 5

FIG. 9 is a schematic structural diagram of an unmanned aerial vehicle according to Embodiment 5 of the present invention. As shown in FIG. 9, Embodiment 5 of the present invention also provides an unmanned aerial vehicle 60. The unmanned aerial vehicle 60 of this embodiment includes a chassis and an embodiment. The medicine box device 40 of the second and third embodiments, wherein the structure, working principle and effect of the medicine box device 40 have been described in detail in the foregoing second and third embodiments, and will not be repeated here.

Specifically, the water tank of the medicine tank device 40 is detachably mounted on the rack. For example, the water tank can be set on the fixing bracket of the fixed structure through one of screw connection, pin connection and snap connection. This detachable setting method can simplify the installation and removal process of the water tank.

Generally, the rack of the UAV 60 may include a fuselage 61, an arm 62, and the like. The medicine box device 40 is generally disposed below the fuselage 61, and the number of the medicine box device 40 may be one or more to meet Holds the needs of different types of liquids.

The unmanned aerial vehicle of this embodiment includes a rack and a medicine tank device. The liquid level measuring device in the medicine tank device can be provided with a buoy assembly inside the water tank, and a non-contact measurement unit outside the water tank. The induction process between the magnetic induction units of the contact measurement component achieves the purpose of measuring the liquid level of the water tank, which is convenient for the liquid adding device to add liquid to the water tank in time. The magnetic field induction principle can be used to avoid setting the buoy component and the non-contact measurement component. Connect the wires to prevent the liquid level measuring device from interfering with the normal installation and removal of the water tank while measuring the liquid level in the water tank, and the structure of the liquid level measuring device is relatively simple.

Example Six

FIG. 10 is a schematic structural diagram of an unmanned aerial vehicle according to Embodiment 6 of the present invention. As shown in FIG. 10, Embodiment 6 of the present invention also provides an unmanned aerial vehicle 60 ′. The unmanned aerial vehicle 60 ′ of this embodiment includes a rack and The liquid adding device 50 of the fourth embodiment, wherein the structure, working principle, and effect of the liquid adding device 50 have been described in detail in the foregoing fourth embodiment, and are not repeated here.

Specifically, the liquid adding device 50 is located on a rack. The liquid adding device 50 can be fixed on the frame, and the latter can be detachably installed on the frame. In actual use, the specific installation method of the liquid adding device 50 can be selected according to needs. This embodiment does not address this. Be restricted.

Generally, the rack of the unmanned aerial vehicle 60 'may include a fuselage 61', an arm 62 ', and the like. The liquid adding device 50 is generally disposed below the fuselage 61', and the number of the liquid adding devices 50 may be one or more. To meet the needs of adding different kinds of liquids.

The unmanned aerial vehicle of this embodiment includes a rack and a liquid adding device. The liquid adding device can set a buoy component in the water tank, and a non-contact measurement component outside the water tank. The magnetic part of the buoy component and the magnetic properties of the non-contact measurement component are used. The induction process between the sensing units achieves the purpose of measuring the liquid level of the water tank, which is convenient for the liquid adding device to add liquid to the water tank in a timely manner. The magnetic field induction principle can be used to avoid setting connection wires on the buoy component and the non-contact measurement component. While measuring the liquid level in the medium, the liquid level measuring device is prevented from interfering with the normal installation and removal of the water tank, and the structure of the liquid level measuring device is relatively simple.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or to replace some or all of the technical features equivalently; and these modifications or replacements do not depart from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present invention. range.

Claims

A drone liquid level measuring device is characterized in that it includes a buoy assembly and a non-contact measurement assembly, the buoy assembly is configured to be installed in a water tank, and the buoy assembly includes a liquid that can follow the liquid in the water tank. The non-contact measurement component can be disposed outside the water tank and spaced from the buoy component. The non-contact measurement component is used to sense the position of the buoy component, and The liquid level of the liquid in the water tank is determined according to the position of the buoy.
The liquid level measuring device according to claim 1, wherein the non-contact measurement component has a sensing method including any one of the following sensing: magnetic field sensing, electric field sensing, and optical sensing.
The liquid level measurement device according to claim 1, wherein the non-contact measurement component comprises at least one magnetic induction unit.
The liquid level measuring device according to claim 3, wherein the non-contact measurement component includes at least two magnetic induction units, and different magnetic induction units are located at different height positions of the water tank.
The liquid level measuring device according to claim 4, wherein at least two of the magnetic induction units are arranged at intervals in the vertical direction.
The liquid level measuring device according to any one of claims 3-5, wherein the magnetic induction unit comprises any one of the following: a Hall sensor and a magnetic switch.
The liquid level measuring device according to any one of claims 3-5, wherein the magnetic induction unit is installed on an outer wall of the water tank.
The liquid level measuring device according to any one of claims 3-5, wherein the buoy member includes a magnetic portion having magnetic properties.
The liquid level measuring device according to claim 8, wherein the entire buoy member is a magnetic member.
The liquid level measuring device according to any one of claims 1-5, wherein the number of the buoy pieces is at least one.
The liquid level measuring device according to claim 10, wherein the number of the buoy pieces is at least two, and different buoy pieces are located at different height positions in the water tank.
The liquid level measuring device according to claim 11, wherein at least two of the buoy members are arranged at intervals in the vertical direction.
The liquid level measuring device according to any one of claims 1 to 5, wherein the buoy assembly further comprises a bracket, and the buoy member is rotatably connected to the bracket through a horizontal rotation shaft.
The liquid level measuring device according to claim 13, wherein the bracket is detachably connected to the water tank.
The liquid level measuring device according to claim 14, wherein the bracket is connected to the inner wall of the water tank by a threaded fastener; or the bracket is engaged with the inner wall of the water tank.
The liquid level measuring device according to claim 13, wherein the horizontal rotating shaft is connected to a middle portion of the buoy member.
The liquid level measuring device according to claim 16, wherein a first end of the buoy member is configured to generate buoyancy when it contacts a liquid in the water tank, and a second end of the buoy member is magnetic, And the distance between the second end of the buoy member and the inner wall of the water tank is smaller than the distance between the first end of the buoy member and the inner wall of the water tank.
The liquid level measuring device according to claim 17, wherein when the first end of the buoy member does not generate buoyancy, the second end of the buoy member and the magnetic induction unit are staggered from each other; the buoy member When the first end of the buoy generates buoyancy, the position of the second end of the buoy member corresponds to the position of the magnetic induction unit.
The liquid level measuring device according to claim 17, wherein when the first end of the buoy member does not generate buoyancy, the position of the second end of the buoy member corresponds to the position of the magnetic induction unit; When the first end of the buoy member generates buoyancy, the second end of the buoy member and the magnetic induction unit are staggered from each other.
The liquid level measuring device according to any one of claims 17 to 19, wherein the first end of the buoy member has a closed hollow cavity, and the density of the medium in the hollow cavity is smaller than that in the water tank The density of the liquid.
The liquid level measuring device according to claim 20, wherein the hollow cavity is a vacuum cavity or filled with air.
The liquid level measuring device according to any one of claims 17 to 19, wherein a distance from a first end of the buoy member to the horizontal rotation axis is greater than a second end of the buoy member to the horizontal rotation axis distance.
The liquid level measuring device according to claim 22, wherein a distance from a first end of the buoy member to the horizontal rotation axis is 2- to a distance from a second end of the buoy member to the horizontal rotation axis. 4 times.
A drone medicine tank device, comprising a water tank, a fixed structure and the liquid level measuring device according to any one of claims 1 to 23, wherein the fixed structure is located outside the water tank, and the liquid level A non-contact measurement component in the measurement device is disposed on the fixed structure.
The medicine tank device according to claim 24, wherein the water tank has an opening, and a buoy assembly in the liquid level measuring device is installed in the water tank through the opening.
The medicine box device according to claim 24 or 25, wherein the water tank is detachably provided on the fixed structure.
The medicine box device according to claim 26, wherein the water tank is placed on the fixed structure.
A drone medicine box device is characterized in that it includes:

Water tanks for pesticides; and

A buoy assembly is disposed in the water tank, and the buoy assembly includes a buoy member that can move with the change of the liquid level in the water tank;

The buoy assembly can cooperate with a non-contact measurement component located outside the water tank. The buoy assembly is spaced from the non-contact measurement component. The non-contact measurement component is used to sense the buoy. position of the member, and determining the level of liquid within the tank according to the position of the buoy member.
The medicine tank device according to claim 28, wherein the water tank has an opening, and the buoy assembly in the liquid level measuring device is installed in the water tank through the opening.
The medicine box device according to claim 28, wherein the buoy member includes a magnetic portion having magnetic properties.
The medicine box device according to claim 30, wherein the entire buoy member is a magnetic member.
The medicine box device according to any one of claims 28 to 31, wherein the number of the buoy pieces is at least one.
The medicine box device according to claim 32, wherein the number of the buoy pieces is at least two, and different buoy pieces are located at different height positions in the water tank.
The medicine box device according to claim 33, wherein at least two of the buoy members are arranged at intervals in the vertical direction.
The medicine box device according to any one of claims 28 to 31, wherein the buoy assembly further comprises a bracket, and the buoy member is rotatably connected to the bracket through a horizontal rotation shaft.
The medicine box device according to claim 35, wherein the bracket is detachably connected to the water tank.
The medicine box device according to claim 36, wherein the bracket is connected to the inner wall of the water tank by a threaded fastener; or the bracket is engaged with the inner wall of the water tank.
The medicine box device according to claim 35, wherein the horizontal rotating shaft is connected to a middle portion of the buoy member.
The medicine box device according to claim 38, wherein a first end of the buoy member is used to generate buoyancy when it contacts a liquid in the water tank, a second end of the buoy member is magnetic, and The distance between the second end of the buoy member and the inner wall of the water tank is smaller than the distance between the first end of the buoy member and the inner wall of the water tank.
The medicine box device according to claim 39, wherein when no buoyancy is generated at the first end of the buoy member, the second end of the buoy member and the magnetic induction unit are staggered from each other; When the first end generates buoyancy, the position of the second end of the buoy member corresponds to the position of the magnetic induction unit.
The medicine box device according to claim 39, wherein, when no buoyancy is generated at the first end of the buoy member, the position of the second end of the buoy member corresponds to the position of the magnetic induction unit; When the first end of the buoy member generates buoyancy, the second end of the buoy member and the magnetic induction unit are staggered from each other.
The medicine box device according to any one of claims 39 to 41, wherein the first end of the buoy member has a closed hollow cavity, and the density of the medium in the hollow cavity is less than the liquid in the water tank Density.
The medicine box device according to claim 42, wherein the hollow cavity is a vacuum cavity or filled with air.
The medicine box device according to any one of claims 39 to 41, wherein a distance from a first end of the buoy member to the horizontal rotation axis is greater than a distance from the second end of the buoy member to the horizontal rotation axis. distance.
The medicine box device according to claim 44, wherein a distance from a first end of the buoy member to the horizontal rotation axis is 2-4 of a distance from a second end of the buoy member to the horizontal rotation axis. Times.
A liquid filling device for an unmanned aerial vehicle, comprising a base, a liquid adding component and a non-contact measurement component, the liquid adding component is installed on the base and is used for filling a medicine box device Liquid, the non-contact measurement component is connected to the base for detecting the liquid level of the liquid in the water tank of the medicine tank device,

Wherein, the non-contact measuring component is used to cooperate with a buoy component in the water tank, the buoy component is spaced from the non-contact measuring component, and the buoy component includes a level change moves the buoy member, the non-contact measuring assembly for sensing the position of the buoy member, and determining the level of liquid within the tank according to the position of the buoy member.
The liquid adding device according to claim 46, further comprising a controller, wherein the liquid adding component and the non-contact measurement component in the medicine box device are electrically connected to the controller, so that The controller is configured to control a working state of the liquid adding component according to a liquid level detected by the non-contact measuring component.
The liquid adding device according to claim 46, wherein the water tank can be detachably connected to the base with bare hands.
The liquid adding device according to claim 46-48, wherein the sensing method of the non-contact measuring component comprises any one of the following sensing: magnetic field sensing, electric field sensing, and optical sensing.
The liquid adding device according to claim 46-48, wherein the non-contact measurement component comprises at least one magnetic induction unit.
The liquid adding device according to claim 50, wherein the non-contact measurement component includes at least two magnetic induction units, and different magnetic induction units are located at different height positions of the water tank.
A liquid adding device according to claim 51, wherein at least two of said magnetic induction units are arranged at intervals in the vertical direction.
The liquid adding device according to any one of claims 50 to 52, wherein the magnetic induction unit includes any one of the following: a Hall sensor and a magnetic switch.
The liquid adding device according to any one of claims 50 to 52, wherein the magnetic induction unit is installed on an outer wall of the water tank.
The liquid adding device according to any one of claims 46 to 48, wherein the buoy member includes a magnetic portion having magnetic properties.
The liquid adding device according to claim 55, wherein the entire buoy member is a magnetic member.
The liquid adding device according to any one of claims 46 to 48, wherein the number of the buoy pieces is at least one.
The liquid adding device according to claim 57, wherein the number of the buoy pieces is at least two, and different buoy pieces are located at different height positions in the water tank.
The liquid adding device according to claim 58, wherein at least two of the buoy members are arranged at intervals in the vertical direction.
The liquid adding device according to any one of claims 46 to 48, wherein the buoy assembly further comprises a bracket, and the buoy member is rotatably connected to the bracket through a horizontal rotation shaft.
The liquid adding device according to claim 60, wherein the bracket is detachably connected to the water tank.
The liquid adding device according to claim 61, wherein the bracket is connected to the inner wall of the water tank by a threaded fastener; or the bracket is engaged with the inner wall of the water tank.
The liquid adding device according to claim 60, wherein the horizontal rotating shaft is connected to a middle portion of the buoy member.
The liquid adding device according to claim 63, wherein a first end of the buoy member is configured to generate buoyancy when it contacts a liquid in the water tank, and a second end of the buoy member is magnetic, and The distance between the second end of the buoy member and the inner wall of the water tank is smaller than the distance between the first end of the buoy member and the inner wall of the water tank.
The liquid adding device according to claim 64, wherein when no buoyancy is generated at the first end of the buoy member, the second end of the buoy member and the magnetic induction unit are staggered from each other; When the first end generates buoyancy, the position of the second end of the buoy member corresponds to the position of the magnetic induction unit.
The liquid adding device according to claim 64, wherein when the first end of the buoy member does not generate buoyancy, the position of the second end of the buoy member corresponds to the position of the magnetic induction unit; When the first end of the buoy member generates buoyancy, the second end of the buoy member and the magnetic induction unit are staggered from each other.
The liquid adding device according to any one of claims 64 to 66, wherein the first end of the buoy member has a closed hollow cavity, and the density of the medium in the hollow cavity is less than the liquid in the water tank Density.
The liquid adding device according to claim 67, wherein the hollow cavity is a vacuum cavity or filled with air.
The liquid adding device according to any one of claims 64 to 66, wherein a distance from a first end of the buoy member to the horizontal rotation axis is greater than a distance from the second end of the buoy member to the horizontal rotation axis. distance.
The liquid adding device according to claim 69, wherein a distance from a first end of the buoy member to the horizontal rotation axis is 2-4 of a distance from a second end of the buoy member to the horizontal rotation axis. Times.
An unmanned aerial vehicle, comprising a rack and the medicine box device according to any one of claims 28 to 45, and a water tank of the medicine box device is detachably mounted on the rack.
An unmanned aerial vehicle, comprising a rack and the liquid adding device according to any one of claims 46 to 70, wherein the liquid adding device is located on the rack.