Liquid storage device and aircraft

Abstract

The utility model provides a liquid storage device and an aircraft, and relates to the technical field of agricultural equipment. The liquid storage device comprises a liquid storage tank, an air pressure sensor and an air chamber seat. The liquid storage tank is arranged on the machine body. The air pressure sensor is used for detecting the liquid level of liquid in the liquid storage tank. The air chamber seat is arranged in the liquid storage tank, the air chamber seat is communicated with the air pressure sensor through an air pipe, the air chamber seat is provided with an opening and an air cavity which are communicated, the air chamber seat is communicated with the air cavity in the liquid storage tank through the opening, and the direction of the opening is perpendicular to the advancing direction of the machine body. The opening of the air chamber seat is arranged to be perpendicular to the advancing direction of the machine body, so that the opening of the air chamber seat can face the left-right direction of the machine body no matter the machine body is in a forward inclination posture or a backward inclination posture in the advancing process, and the liquid level detected by the air pressure sensor is closer to the real liquid level; therefore, liquid level detection is more accurate, the difficulty of compensation calculation through calculation software is lower, and the output liquid level is closer to the real dosage.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural equipment, and more specifically, to a liquid storage device and an aircraft. Background Art

[0002] With the continuous development and application of UAV technology, it has gradually become one of the key means for the prevention and control of crop pests and diseases. By equipping with a precise pesticide spraying system, UAVs can effectively overcome the limitations inherent in traditional ground spraying equipment, such as low efficiency and inconvenient operation.

[0003] However, during the flight of the UAV, the aircraft often tilts forward and backward, causing the liquid level in the tank to change, resulting in a large deviation between the actual liquid level and the detected liquid level at this time, thus making it impossible to accurately detect the amount of pesticide in the tank. Summary of the Utility Model

[0004] The utility model provides a liquid storage device and an aircraft, which can more accurately detect the amount of liquid in the liquid storage tank.

[0005] Embodiments of the utility model may be implemented as follows:

[0006] In a first aspect, the utility model provides a liquid storage device, including:

[0007] A liquid storage tank, which is arranged on the airframe;

[0008] A barometric pressure sensor, which is used to detect the liquid level of the liquid in the liquid storage tank;

[0009] An air chamber seat, which is arranged in the liquid storage tank. The air chamber seat is communicated with the barometric pressure sensor through an air pipe. The air chamber seat is provided with a communicating opening and an air cavity. The air chamber seat is communicated with the air cavity in the liquid storage tank through the opening, wherein the orientation of the opening is perpendicular to the traveling direction of the airframe.

[0010] In the above embodiment, by arranging the opening of the air chamber seat perpendicular to the traveling direction of the airframe, no matter whether the airframe is in a forward-tilted or backward-tilted posture during traveling, the opening of the air chamber seat can be made to face the left and right directions of the airframe, so that the liquid level detected by the barometric pressure sensor is closer to the true liquid level. Compared with the existing liquid storage device, the liquid level detection is more accurate, and the difficulty of compensation calculation through calculation software is smaller, and the output liquid level is closer to the true amount of liquid.

[0011] In an alternative embodiment, the air chamber seat is arranged on the bottom wall of the liquid storage tank.

[0012] In an alternative embodiment, the air chamber seat is arranged at the exact center of the bottom wall of the liquid storage tank.

[0013] In an alternative embodiment, the liquid storage tank includes a side wall and a bottom wall. The bottom wall includes a mounting portion and a connecting portion. The outer edge of the connecting portion is connected to the side wall, the inner edge at the center of the connecting portion is connected to the mounting portion, and the connecting portion is inclined downward from the outer edge towards the inner edge. The air chamber seat is disposed on the mounting portion.

[0014] In an alternative embodiment, the front-rear direction of the liquid storage tank is parallel to the traveling direction of the body, and the liquid storage tank is symmetrically arranged with respect to a plane that is perpendicular to the front-rear direction and passes through the center of the liquid storage tank.

[0015] In an alternative embodiment, the number of the openings is two, and the two openings are respectively disposed on two side portions of the air chamber seat that are perpendicular to the traveling direction of the body.

[0016] In an alternative embodiment, the opening is located at the bottom of the side portion of the air chamber seat.

[0017] In an alternative embodiment, the opening extends in a vertically upward direction from the bottom of the side portion of the air chamber seat.

[0018] In an alternative embodiment, the width of the opening is 4 mm to 8 mm.

[0019] In an alternative embodiment, the air chamber seat is further provided with a connector. The connector is communicated with the air chamber. One end of the air tube is connected to the air pressure sensor, and the other end is connected to the connector.

[0020] In an alternative embodiment, the cross-section of the air chamber is larger than the inner diameter of the air tube.

[0021] In an alternative embodiment, the liquid storage device further includes a mounting bracket for connecting to the body, and the liquid storage tank is disposed on the mounting bracket.

[0022] In a second aspect, the present invention provides an aircraft, including a body and the liquid storage device according to any one of the foregoing embodiments, and the body is connected to the liquid storage device.

[0023] The beneficial effects of the liquid storage device and the aircraft provided by the embodiments of the present invention include: by setting the opening of the air chamber seat to be perpendicular to the traveling direction of the body, no matter whether the body is in a forward-tilted or backward-tilted posture during the traveling process, the opening of the air chamber seat can face the left and right directions of the body, so that the liquid level detected by the air pressure sensor is closer to the real liquid level. Compared with the existing liquid storage devices, the liquid level detection is more accurate, the difficulty of compensation calculation through the calculation software is smaller, and the output liquid level is closer to the real drug amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the existing liquid storage device provided by the embodiment of the present utility model in an inclined posture;

[0026] Figure 2 Schematic diagram of the liquid storage device when the aircraft provided by the embodiment of the present utility model is in a front-back inclined posture;

[0027] Figure 3 Schematic diagram of the liquid storage device when the aircraft provided by the embodiment of the present utility model is in a horizontal posture;

[0028] Figure 4 Schematic diagram of the structure of the liquid storage device provided by the embodiment of the present utility model;

[0029] Figure 5 Schematic diagram of the structure of the liquid storage tank provided by the embodiment of the present utility model;

[0030] Figure 6 Schematic diagram of the structure of the air chamber seat provided by the embodiment of the present utility model.

[0031] Icons: 10 - liquid storage device; 100 - mounting rack; 200 - liquid storage tank; 210 - side wall; 220 - bottom wall; 221 - mounting part; 222 - connecting part; 300 - air pressure sensor; 400 - air chamber seat; 410 - opening; 420 - air cavity; 430 - connecting head; 500 - air pipe. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0036] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0037] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0038] With the continuous development and application of unmanned aerial vehicle (UAV) technology, it has gradually become one of the key means for the prevention and control of crop pests and diseases. By equipping with a precise chemical spraying system, UAVs can effectively overcome the limitations inherent in traditional ground spraying equipment, such as low efficiency and inconvenient operation.

[0039] However, during the flight of the UAV, the aircraft often assumes a front-back tilted posture, which causes the liquid level in the tank to change, resulting in a large deviation between the detected liquid level and the actual liquid level at this time, and thus the amount of chemicals in the tank cannot be accurately detected.

[0040] Specifically, for example Figure 1 as shown Figure 1 when the aircraft is in a front-back tilted posture, the openings 410 of the existing air chamber structure usually face the front and back directions of the aircraft (such as Figure 1 the A direction shown), and since the aircraft often tilts front and back during flight, the liquid levels at the two openings 410 on both sides of the air chamber seat 400 are different, and the liquid level detected by the barometer (such as Figure 1 H1 shown) is the liquid level of the opening 410 on the side closer to the liquid surface, resulting in the actual liquid level (such as Figure 1The one shown in Figure H has a large error from the detected liquid level.

[0041] Based on the above problems, the embodiment of the present utility model provides an aircraft, which is used to solve the above problems, can be applicable to the field of unmanned aerial vehicles, especially applicable to the field of agricultural equipment, and can be used for spreading materials through the aircraft, which is convenient, fast and efficient, and significantly improves the operation efficiency.

[0042] Specifically, the aircraft includes a fuselage and a liquid storage device 10, and the fuselage is connected to the liquid storage device 10. The liquid storage device 10 can be used to load liquid materials such as drugs. The fuselage drives the liquid storage device 10 to fly, and completes the spreading operation through the liquid storage device 10 during flight, thereby significantly improving the agricultural operation efficiency.

[0043] Optionally, the fuselage can be a rotor unmanned aerial vehicle, specifically a quad-rotor unmanned aerial vehicle. Of course, it can also be a single-rotor unmanned aerial vehicle, a dual-rotor unmanned aerial vehicle, a six-rotor unmanned aerial vehicle, an eight-rotor unmanned aerial vehicle, etc. The flight fuselage can operate automatically according to a preset path, flight speed, attitude, etc., or be manually controlled by an operator.

[0044] Please continue to refer to Figures 2 to 6 , wherein, Figure 2 is the aircraft in a horizontal flight attitude, Figure 3 is the aircraft in a front-back tilted flight attitude.

[0045] Specifically, the liquid storage device 10 includes a liquid storage tank 200, a pressure sensor 300, and an air chamber seat 400.

[0046] Among them, the liquid storage tank 200 is arranged on the fuselage. It is worth mentioning that the fuselage can be the above-mentioned flight vehicle, and in other embodiments of the present utility model, it can also be a vehicle running on land or water, which is not specifically limited here.

[0047] The pressure sensor 300 is used to detect the liquid level of the liquid in the liquid storage tank 200; the air chamber seat 400 is arranged in the liquid storage tank 200, and the air chamber seat 400 is communicated with the pressure sensor 300 through a trachea 500. The air chamber seat 400 is provided with a communicating opening 410 and an air cavity 420. The air chamber seat 400 is communicated with the air cavity 420 in the liquid storage tank 200 through the opening 410, wherein the orientation of the opening 410 is perpendicular to the traveling direction of the fuselage.

[0048] In this embodiment, by setting the opening 410 of the air chamber seat 400 perpendicular to the traveling direction of the body, no matter whether the body is in a forward-tilted or backward-tilted posture during traveling, the opening 410 of the air chamber seat 400 can be made to face the left and right directions of the body, so that the opening 410 of the air chamber seat 400 is less affected by the tilted posture of the body, thereby making the liquid level detected by the pressure sensor 300 closer to the true liquid level. Compared with the existing liquid storage device 10, the liquid level detection is more accurate, and the difficulty of compensation calculation by the calculation software is smaller, and the output liquid level is closer to the true drug amount.

[0049] However, it is found in actual application that the size of the opening 410 also affects the detected liquid level deviation. For example, Figure 3 as shown, when the opening 410 is set on the left and right sides of the air chamber seat 400 relative to the traveling direction of the body, when the body is in a forward and backward tilted posture, the measured liquid level (such as Figure 3 shown as H1) is the vertical distance from the liquid surface, that is, the shortest distance between the highest point of the corresponding opening 410 and the liquid surface (such as Figure 3 shown as H1). Although when the opening 410 is designed in the front and back directions of the air chamber seat 400 relative to the traveling of the body, the detection deviation can be reduced to a certain extent by shortening the distance between the front and back openings, but at the same time, the volume of the air chamber 420 of the air chamber seat 400 will be reduced, and the air chamber 420 of the air chamber seat 400 has certain volume requirements and cannot greatly shorten the distance between the front and back openings, otherwise the air pressure detection function cannot be realized. Therefore, by setting the opening 410 on the left and right sides of the air chamber seat 400 relative to the traveling direction of the body, compared with the existing air chamber seat 400, while reducing the liquid level detection deviation, in this case, the detection deviation also depends on the size of the opening 410. Thus, the liquid storage device 10 can also reduce the size of the opening 410 to reduce the liquid level deviation.

[0050] However, although the smaller the opening 410, the smaller the deviation, but if the opening 410 is too small, due to the viscosity of the liquid medicine and the surface tension of the liquid will form a mucous membrane at the opening 410, thus affecting the air pressure reading. Therefore, setting the width of the opening 410 to 4 mm to 8 mm can make the detection liquid level error smaller and avoid the formation of a mucous membrane of the liquid medicine at the opening 410.

[0051] Further, the air chamber seat 400 is arranged on the bottom wall 220 of the liquid storage tank 200.

[0052] In this embodiment, by arranging the air chamber seat 400 on the bottom wall 220 of the liquid storage tank 200, it is ensured that the position where the opening 410 is located can more accurately detect the liquid level of the liquid medicine.

[0053] Further, the air chamber seat 400 is arranged at the exact center of the bottom wall 220 of the liquid storage tank 200.

[0054] In this embodiment, since the existing air chamber seat 400 is arranged at one end of the box body close to the nose of the aircraft, when the aircraft tilts forward or backward during flight, the liquid level will tilt, resulting in inaccurate detection of the liquid level. Moreover, a large number of compensation calculations are required by the calculation software, and it is easy to misread. Therefore, in the present utility model, the air chamber seat 400 is arranged at the exact center of the bottom wall 220 of the liquid storage tank 200, so as to reduce the influence caused by the tilting of the liquid level when the aircraft tilts forward or backward, so that even when the aircraft is in a tilted posture, the air pressure of the air chamber seat 400 is close to the average value, and thus the amount of medicine closer to the true liquid level can be detected by the pressure sensor 300.

[0055] Furthermore, the liquid storage tank 200 includes a side wall 210 and a bottom wall 220. The bottom wall 220 includes a mounting portion 221 and a connecting portion 222. The outer edge of the connecting portion 222 is connected to the side wall 210, and the inner edge of the connecting portion 222 located at the exact center is connected to the mounting portion 221. Moreover, the connecting portion 222 is arranged to slope downward from the outer edge towards the inner edge, and the air chamber seat 400 is arranged on the mounting portion 221.

[0056] In other words, the mounting portion 221 is at the lowest position of the liquid storage tank 200, so that the air chamber seat 400 is installed at the lowest position inside the liquid storage tank 200. Therefore, even when only a small amount of liquid is loaded in the liquid storage tank 200, it can be ensured that the air chamber seat 400 is located at the deepest liquid level of the liquid storage tank 200, so that the corresponding liquid level can be detected, thereby improving the liquid level detection range of the liquid storage device 10.

[0057] Furthermore, the front-back direction of the liquid storage tank 200 is parallel to the traveling direction of the aircraft body, and the liquid storage tank 200 is symmetrically arranged about a plane (as shown by the dotted line in Figure 5 ) that is perpendicular to the front-back direction and passes through the center of the liquid storage tank 200.

[0058] In this embodiment, by designing the liquid storage tank 200 as a left-right symmetric structure (as shown by the plane where Figure 5 is located), and arranging the air chamber seat 400 at the center of the bottom wall 220 with the lowest liquid level of the liquid storage tank 200, even if there is only a small amount of liquid in the liquid storage tank 200, the corresponding liquid level can be detected by the air chamber seat 400 and the pressure sensor 300, thereby improving the liquid level detection range of the liquid storage device 10.

[0059] Furthermore, the number of openings 410 is two, and the two openings 410 are respectively arranged on two side parts of the air chamber seat 400 perpendicular to the traveling direction of the aircraft body.

[0060] In this embodiment, since the liquid level detected by the pressure sensor 300 is the liquid level closest to the vertical distance from the water surface, by arranging the opening 410 at the bottom of the side part of the air chamber seat 400, the liquid level detection range of the liquid storage device 10 can be further improved.

[0061] Specifically, the opening 410 extends in a vertically upward direction from the bottom of the side of the air chamber seat 400.

[0062] In this embodiment, when the aircraft is in a horizontal attitude, the opening 410 extends upward in the vertical direction from the bottom of the air chamber seat 400.

[0063] Furthermore, the liquid storage device 10 further includes an air pipe 500. The air chamber seat 400 is also provided with a connector 430 which is communicated with the air cavity 420. One end of the air pipe 500 is connected to the pressure sensor 300, and the other end is connected to the connector 430.

[0064] In this embodiment, the cross-sectional dimension of the air cavity 420 is larger than the inner diameter of the air pipe 500, so as to reduce the influence of gas water solubility, temperature change, leakage of the air pipe 500, etc. In addition, this design can also reduce the influence of the vibration of the liquid storage tank 200. By providing a pagoda-shaped connector 430 at the top of the air chamber seat 400 for plugging with the air pipe 500, the pressure sensor 300 can detect the air pressure in the air cavity 420 of the air chamber seat 400 through the air pipe 500.

[0065] When the liquid storage tank 200 is in a full-liquid state, the air cavity 420 provides a relatively large space that can accommodate more gas. Even in the case of gas dissolving in water, liquid level turbulence, small amount of gas leakage, temperature change, etc., by providing the air cavity 420, the above situations will not cause too much fluctuation in air pressure, so it can also play a role in stabilizing air pressure and filtering out interference.

[0066] Optionally, the cross-section of the air cavity 420 can be a circular design or a square design, as long as its cross-sectional area is larger than the inner diameter of the air pipe 500. The structure of the air cavity 420 is not specifically limited herein.

[0067] Furthermore, the liquid storage device 10 further includes a mounting frame 100 which is used to connect with the airframe, and the liquid storage tank 200 is arranged on the mounting frame 100.

[0068] In this embodiment, the pressure sensor 300 can be arranged on the mounting frame 100 or directly on the liquid storage tank 200, and no specific limitation is made herein.

[0069] In summary, the embodiment of the present utility model provides a liquid storage device 10 and an aircraft. By arranging the opening 410 of the air chamber seat 400 perpendicular to the traveling direction of the airframe, no matter whether the airframe is in a forward-tilted or backward-tilted posture during the traveling process, the opening 410 of the air chamber seat 400 can be made to face the left and right directions of the airframe. In this way, the opening 410 of the air chamber seat 400 is not affected by the tilted posture of the airframe, that is, no matter whether the airframe is in a forward-tilted or backward-tilted posture, the liquid levels on both sides of the opening 410 of the air chamber seat 400 are the same, so that the liquid level detected by the pressure sensor 300 is closer to the true liquid level. Compared with the existing liquid storage device 10, the liquid level detection is more accurate, and the difficulty of compensation calculation through the calculation software is smaller, and the output liquid level is closer to the true drug amount.

[0070] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A liquid storage device, characterized in that, Comprising: A liquid storage tank (200), the liquid storage tank (200) being provided on the body; A pressure sensor (300), the pressure sensor (300) being used to detect the liquid level of the liquid in the liquid storage tank (200); An air chamber seat (400), the air chamber seat (400) being provided in the liquid storage tank (200), the air chamber seat (400) being communicated with the pressure sensor (300) through an air pipe (500), the air chamber seat (400) being provided with a communicated opening (410) and an air cavity (420), the air chamber seat (400) being communicated with the air cavity (420) in the liquid storage tank (200) through the opening (410), wherein the orientation of the opening (410) is perpendicular to the traveling direction of the body.

2. The liquid storage device according to claim 1, characterized in that, The air chamber seat (400) is provided on the bottom wall (220) of the liquid storage tank (200).

3. The liquid storage device according to claim 2, characterized in that, The air chamber seat (400) is provided at the exact center of the bottom wall (220) of the liquid storage tank (200).

4. The liquid storage device according to any one of claims 1-3, characterized in that, The liquid storage tank (200) includes a side wall (210) and a bottom wall (220), the bottom wall (220) includes a mounting portion (221) and a connecting portion (222), the outer edge of the connecting portion (222) is connected to the side wall (210), the inner edge at the exact center of the connecting portion (222) is connected to the mounting portion (221), and the connecting portion (222) is arranged to slope downwards from the outer edge towards the inner edge, and the air chamber seat (400) is provided on the mounting portion (221).

5. The liquid storage device according to claim 1, wherein, The front-back direction of the liquid storage tank (200) is parallel to the traveling direction of the body, and the liquid storage tank (200) is symmetrically arranged about a plane that is perpendicular to the front-back direction and passes through the center of the liquid storage tank (200).

6. The liquid storage device according to claim 1, wherein The number of the openings (410) is two, and the two openings (410) are respectively provided on two side portions of the air chamber seat (400) that are perpendicular to the traveling direction of the body.

7. The liquid storage device according to claim 1, characterized in that The opening (410) is located at the bottom of the side portion of the air chamber seat (400).

8. The liquid storage device according to claim 1, characterized in that The opening (410) extends in the vertically upward direction from the bottom of the side portion of the air chamber seat (400).

9. The liquid storage device according to claim 1, wherein, The width of the opening (410) is 4 mm to 8 mm.

10. The liquid storage device according to claim 1, characterized in that, The air chamber seat (400) is further provided with a connector (430), the connector (430) being communicated with the air cavity (420), one end of the air pipe (500) is connected to the pressure sensor (300), and the other end is connected to the connector (430).

11. The liquid storage device according to claim 10, wherein The cross-sectional area of the air cavity (420) is larger than the inner diameter of the air pipe (500).

12. The liquid storage device according to claim 1, wherein, The liquid storage device further includes a mounting frame (100), the mounting frame (100) being used to connect to the body, and the liquid storage tank (200) is provided on the mounting frame (100).

13. An aircraft, characterized in that, Comprising a body and the liquid storage device according to any one of claims 1-12, the body being connected to the liquid storage device.

Images