CN212058988U - Level gauge, spraying assembly and unmanned aerial vehicle - Google Patents
Level gauge, spraying assembly and unmanned aerial vehicle Download PDFInfo
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- CN212058988U CN212058988U CN202020972513.XU CN202020972513U CN212058988U CN 212058988 U CN212058988 U CN 212058988U CN 202020972513 U CN202020972513 U CN 202020972513U CN 212058988 U CN212058988 U CN 212058988U
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Abstract
A liquid level meter, a spraying assembly and an unmanned aerial vehicle are provided, wherein the liquid level meter comprises a measuring assembly and a detecting device, and the measuring assembly comprises a first measured unit, a second measured unit and a connecting piece; the first unit to be measured and the second unit to be measured are flexibly connected through a connecting piece, and after the first unit to be measured rises to a first height in liquid, the first unit to be measured can drive the second unit to be measured to float upwards through the connecting piece; the detection device is capable of detecting a position of at least one of the first unit under test and the second unit under test, and generating a level measurement signal based on the detected position information. The second of level gauge setting linkage is surveyed unit and first unit of being surveyed, and first unit of being surveyed is surpassed and is detected the range, and the second unit of being surveyed can be detected, has increased the total range of level gauge. The spraying assembly comprises a water tank, a liquid driving device, a spray head assembly and a liquid level meter, wherein at least part of the liquid level meter is arranged in the water tank. The unmanned aerial vehicle includes a central body provided with a spray assembly, a horn, and a propeller.
Description
Technical Field
The utility model relates to an aircraft technical field especially relates to a level gauge, spray assembly and unmanned vehicles.
Background
A liquid level gauge generally includes a detection device that floats on a liquid surface and is disposed on a tank or a body, and a detected float that is close to the detection device to cause the detection device to generate a signal, the detection device calculating a height of the liquid surface by detecting a position of the float.
In the related art, how long the detection device is arranged can obtain how long the total range of the liquid level meter, and the total range of the whole liquid level meter is limited by the range of the detection device, so the detection device usually needs to run through the whole water tank, and the cost of the whole liquid level meter is higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a first aspect provides a level gauge, the level gauge includes:
the measuring assembly comprises a first measured unit capable of floating on liquid, a second measured unit capable of sinking on the liquid and a connecting piece; the connecting piece is configured to flexibly connect the first unit to be tested and the second unit to be tested, and after the first unit to be tested rises to a first height in the liquid, the first unit to be tested can drive the second unit to be tested to float upwards through the connecting piece;
a detection device configured to be able to detect a position of at least one of the first unit under test and the second unit under test and to generate a liquid level measurement signal based on the detected position information.
In some optional embodiments, the first height is less than or equal to a detection range of the detection device.
In some optional embodiments, the total preset range of the liquid level meter is equal to twice the measuring range of the measuring device, the first height is equal to the measuring range of the measuring device, and the length of the connecting piece between the first unit under test and the second unit under test is equal to the first height.
In some optional embodiments, the liquid level meter further comprises a guide assembly for guiding the moving direction of the first unit under test and the second unit under test.
In some optional embodiments, the guide assembly includes a guide bar arranged in a vertical direction, and the first unit under test and the second unit under test are slidable with respect to the guide bar.
In some optional embodiments, the guide rod is provided with a slide rail, the first unit to be tested is provided with a first slide groove adapted to the slide rail, and the second unit to be tested is provided with a second slide groove adapted to the slide rail.
In some alternative embodiments, the slide rail is disposed on an outer surface of the guide rod;
the first sliding groove is a through hole penetrating through the first unit to be tested, and the first unit to be tested is sleeved on the guide rod;
the second sliding groove is a through hole penetrating through the second tested unit, and the second tested unit is sleeved on the guide rod.
In some optional embodiments, the guide assembly includes a guide tube arranged in a vertical direction, and the first unit under test and the second unit under test are slidable in the guide tube.
In some optional embodiments, the connecting member comprises a rigid connecting rope, one end of the rigid connecting rope is connected with the first unit under test, and the other end of the rigid connecting rope is connected with the second unit under test.
In some optional embodiments, the connecting member includes a connecting rod, and a top abutting portion is disposed at a position of the connecting rod close to the top end; the second unit to be tested is fastened on the connecting rod; the first unit to be tested is arranged between the second unit to be tested and the abutting part, and the first unit to be tested can slide relative to the connecting rod.
In some optional embodiments, the detection range of the detection device is 1/N times of the total range of the liquid level meter, wherein N is a positive integer greater than or equal to 3;
the number of the measuring assemblies is N-1, and the maximum distance between the first measured unit and the second measured unit of the Mth measuring assembly is M/N times of the total measuring range of the liquid level meter, wherein M belongs to [1, N ].
In some optional embodiments, the first unit under test comprises a first magnet, and the second unit under test comprises a second magnet, and the magnetic force generated by the first magnet is not equal to the magnetic force generated by the second magnet.
In some optional embodiments, a limiting portion is disposed between the first unit under test and the second unit under test, and the limiting portion is configured to separate the first unit under test from the second unit under test, so as to prevent the first unit under test from being attracted to the second unit under test.
The utility model discloses the second aspect provides a spray assembly, spray assembly includes: a level gauge for adorning water tank, liquid drive, shower nozzle subassembly of liquid and the utility model provides a, liquid drive with the water tank intercommunication, the shower nozzle subassembly with liquid drive intercommunication, the level gauge is located at least partially in the water tank.
The utility model discloses the third aspect provides an unmanned vehicles, unmanned vehicles includes: the central part, horn and screw, the central part includes the utility model provides a spray the subassembly, the one end of horn with the central part is connected, the other end of horn with the screw is connected.
Based on the above, the utility model provides a level gauge's positive effect lies in, through "the connecting piece is configured into flexible connection first surveyed unit and second surveyed the unit, and first surveyed the unit and be in rise to first height back in the liquid, first surveyed the unit and can pass through the connecting piece drives the second is surveyed the design of unit come-up". Therefore, the measuring range of the liquid level meter is not limited by the measuring range of the detecting device, and the total measuring range of the liquid level meter is increased.
Drawings
FIG. 1 is a schematic cross-sectional view of a liquid level meter according to an embodiment of the present invention;
fig. 2 is a schematic sectional view of an assembly structure of a liquid level meter and a water tank provided in an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the tank and level gauge of the tank of FIG. 2 with the tank liquid at a level;
FIG. 4 is a schematic cross-sectional view of the tank and level gauge of the tank of FIG. 2 with the tank liquid at another level;
FIG. 5 is a partial cross-sectional view of an assembly structure of a liquid level gauge and a guide assembly provided in an embodiment of the present invention;
fig. 6 is a partial sectional view of an assembly structure of a liquid level meter and a water tank according to an embodiment of the present invention;
FIG. 7 is a partial cross-sectional view of the tank and level gauge of the tank of FIG. 6 with the tank liquid at a level;
FIG. 8 is a partial cross-sectional view of the tank and level gauge of FIG. 6 with the tank liquid at another level;
fig. 9 is a schematic structural diagram of an unmanned aerial vehicle according to an embodiment of the present invention;
FIG. 10 is an exploded view of FIG. 9;
fig. 11 is a schematic cross-sectional view of fig. 9.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
It should be noted that, in the description of the present invention, the terms "first" and "second" are only used for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The liquid level gauge in the related art generally includes a detecting device and a detected float, the float floats on the liquid level, the detecting device is disposed on the tank or the body, the float is close to the detecting device to make the detecting device generate a signal, and the detecting device calculates the height of the liquid level by detecting the position of the float. The detection device is arranged to obtain the total measuring range of the liquid level meter, and the total measuring range of the whole liquid level meter is limited by the detection measuring range of the detection device, so that the detection device usually needs to run through the whole water tank, and the cost of the whole liquid level meter is high. The detection device is generally arranged on the machine body, and when the water tank is higher than the machine body, the detection device is difficult to be arranged on the part of the water tank higher than the machine body for measurement.
In view of this, the present application provides a liquid level meter, through the linkage second unit under test and the first unit under test that sets up, under the condition that the liquid level surpassed detection device's detection range, namely first unit under test surpasses detection device's detection range, the second unit under test can be detected by detection device to make the range of liquid level meter no longer receive the restriction of detection device's detection range, increased the total range of liquid level meter.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below may be combined with each other without conflict between the embodiments.
FIG. 1 is a schematic structural view of a liquid level meter according to an embodiment of the present invention; fig. 2 is a schematic sectional view of an assembly structure of a liquid level meter and a water tank provided in an embodiment of the present invention; FIG. 3 is a schematic cross-sectional view of the tank and level gauge of the tank of FIG. 2 with the tank liquid at a level; FIG. 4 is a schematic cross-sectional view of the tank and level gauge of the tank of FIG. 2 with the tank liquid at another level; FIG. 5 is a partial cross-sectional view of an assembly structure of a liquid level gauge and a guide assembly provided in an embodiment of the present invention; fig. 6 is a partial sectional view of an assembly structure of a liquid level meter and a water tank according to an embodiment of the present invention; FIG. 7 is a partial cross-sectional view of the tank and level gauge of the tank of FIG. 6 with the tank liquid at a level; FIG. 8 is a partial cross-sectional view of the fluid level gauge and the tank of FIG. 6 with the tank fluid at another fluid level.
Referring to fig. 1 to 4, the present embodiment provides a liquid level meter 100, where the liquid level meter 100 includes a measuring assembly 10 and a detecting device 20, and the measuring assembly 10 includes a first measured unit 11 capable of floating on a liquid, a second measured unit 12 capable of sinking on the liquid, and a connecting member 13. The connecting member 13 is configured to flexibly connect the first unit under test 11 and the second unit under test 12, and after the first unit under test 11 rises to a first height in the liquid, the first unit under test 11 can drive the second unit under test 12 to float up through the connecting member 13.
And a detecting device 20 arranged in a vertical direction, the detecting device 20 being configured to be able to detect a position of at least one of the first unit under test 11 and the second unit under test 12 and to generate a liquid level measurement signal based on the detected position information.
The fluid level gauge 100 is an instrument for measuring the level of a fluid, the level of which is referred to as the height of the fluid in a container. The first unit under test 11 and the second unit under test 12 are elements that can be detected by the detection device 20, and the types of the first unit under test 11 and the second unit under test 12 vary depending on the selected detection device 20.
In this embodiment, the first unit under test 11 has a buoyancy greater than the sum of the gravity generated by the first unit under test 11, the second unit under test 12 and the connecting member 13. The second unit under test 12 is fixedly connected with the connecting piece 13, and the second unit under test 12 can sink in liquid. It should be noted that the above description is not a limitation on the property of the second unit under test 12, but only a description of the state of the second unit under test 12 in the liquid. It is understood that the second unit under test 12 can sink to the liquid by its own weight or the second unit under test 12 is sunk to the liquid by the connecting member 13.
The detection device 20 may be a photoelectric sensor, a magnetic sensor, or the like, as long as it can detect the movement of the first unit under test 11 and the second unit under test 12 that varies with the liquid level.
In the first mode, the detecting device 20 is a photoelectric sensor, the first measured unit 11 and the second measured unit 12 can block or reflect the optical signals, and the detecting device 20 generates the corresponding liquid level measuring signals based on the optical signals fed back by the first measured unit 11 and the second measured unit 12.
In the second mode, the detecting device 20 is a magnetic sensor, the first unit 11 and the second unit 12 have magnetism and can generate a magnetic field, and the detecting device 20 generates a corresponding liquid level measuring signal based on the magnetic field signals fed back by the first unit 11 and the second unit 12.
It should be noted that the detecting device 20 is not limited to the above two implementation manners, and any manner that can implement the detecting device 20 to detect the movement of the first unit under test 11 and the second unit under test 12 belongs to the protection scope of the present invention.
In the present embodiment, the hall sensor 21 of the magnetic sensor is selected for specific description. The hall sensor 21 is a magnetic field sensor manufactured by the hall effect, the first unit under test 11 and the second unit under test 12 have magnets and can generate magnetic fields, the magnetic field strengths of the first unit under test 11 and the second unit under test 12 are different, and the detection device 20 distinguishes the first unit under test 11 and the second unit under test 12 according to the magnetic field strengths. The detecting device 20 is formed by arranging a plurality of hall sensors 21, when a magnet approaches a certain hall sensor 21 on the detecting device 20, the hall sensor 21 induces a magnetic field to generate an electric signal, and a liquid level measuring signal of a detected element can be generated by combining the position of the detecting device 20.
It can be understood that the total range preset by the liquid level meter 100 is limited by the measuring range of the measuring device 20, the measuring range of the measuring device 20 is determined by the number of the sensors, and the present embodiment improves the total range preset by the liquid level meter 100 by arranging the first unit under test 11 and the second unit under test 12 flexibly connected by the connecting member 13 without changing the measuring range of the measuring device 20.
Referring to fig. 2-4, in fig. 2, the container is in an empty state, the first unit 11 to be measured and the second unit 12 to be measured are both located at the bottom of the container under the action of their own gravity, and the detecting device 20 can detect the position information of the first unit 11 to be measured and the second unit 12 to be measured, and generate a liquid level measuring signal based on the position information.
In fig. 3 the container is filled with a quantity of liquid, the level of which is below the first level. The first unit under test 11 floats on the liquid surface under the action of its own buoyancy, and the second unit under test 12 is located at the bottom of the container, so that the detection device 20 can detect the position information of the first unit under test 11 and the second unit under test 12, and generate a liquid level measurement signal based on the position information.
In fig. 4 the container contains a quantity of liquid at a level above the first level. The first unit under test 11 floats on the liquid surface under the action of the buoyancy of the first unit under test 11, and the second unit under test 12 floats on the liquid surface under the action of the buoyancy of the first unit under test 11, at this time, the first unit under test 11 is already beyond the detection range of the detection device 20, the detection device 20 can only detect the position information of the second unit under test 12, and a liquid level measurement signal is generated based on the position information.
The detection device 20 is arranged in a vertical direction and the bottom of the detection device 20 is flush with the lowest point of the liquid level. The detection device 20 can be disposed along the movement direction of the liquid level, the detection device 20 can be disposed perpendicular to the liquid level or disposed at a certain included angle with the liquid level, and when the detection device 20 is disposed perpendicular to the liquid level, the length of the detection device 20 is the shortest, and the detection efficiency is the highest. The bottom of the detection means 20 is flush with the lowest point of the level of the liquid, which is the state when no liquid is present, i.e. the bottom of the detection means 20 is flush with the bottom of the container for containing the liquid.
By linking the second unit under test 12 with the first unit under test 11, when the liquid level exceeds the detection range of the detection device 20, that is, the first unit under test 11 exceeds the detection range of the detection device 20, the second unit under test 12 can be detected by the detection device 20, so that the range of the liquid level meter 100 is no longer limited by the detection range of the detection device 20, the total range of the liquid level meter 100 is preset to be equal to the detection range of the detection device 20 plus the first height, and the technical effect of increasing the total range of the liquid level meter 100 is achieved on the basis of not increasing the detection range of the detection device 20.
Further, the first height is less than or equal to the detection range of the detection device 20. The level is measured continuously during operation of the gauge 100 and the level is detected at each position within a predetermined total range of the gauge 100. In this embodiment, the first height may be set to be less than or equal to the detection range of the detection device 20, that is, the length of the connecting member 13 is less than or equal to the detection range of the detection device 20, and after the first unit under test 11 is lifted, the connecting member 13 drives the second unit under test 12 to float, so that the liquid level meter 100 can continuously measure.
In some alternative embodiments, the total range preset by the liquid level meter 100 is equal to twice the measuring range of the measuring device 20, the first height is equal to the measuring range of the measuring device 20, and the length of the connecting part 13 between the first unit under test 11 and the second unit under test 12 is equal to the first height. Specifically, the first height is set to be equal to the detection range of the detection device 20, that is, the length of the connecting member 13 between the first detected unit 11 and the second detected unit 12 is equal to the first height, when the first detected unit 11 rises to the limit of the detection range of the detection device 20, the second detected unit 12 is driven to float, the second detected unit 12 can float up by one detection range, the total range of the liquid level meter 100 is two detection ranges, the total range of the liquid level meter 100 is doubled, and at this time, the increased range of the liquid level meter 100 is the largest.
Referring to fig. 1-2, in some alternative embodiments, the liquid level meter 100 further includes a guiding assembly 30, and the guiding assembly 30 is used for guiding the moving directions of the first unit under test 11 and the second unit under test 12. In order to enable the first unit under test 11 and the second unit under test 12 to move up and down smoothly along with the liquid level, on the basis of the present embodiment, the guiding assembly 30 may adopt a structure capable of performing a guiding function in the prior art, such as a guiding structure, such as a guiding rail, a guiding rod 31, or a guiding groove. The guide assembly 30 can enable the first unit under test 11 and the second unit under test 12 to move up and down smoothly, and the stability and the measurement accuracy of the liquid level meter 100 are improved.
Further, the guide assembly 30 includes a guide rod 31 arranged in a vertical direction, and the first unit under test 11 and the second unit under test 12 are slidable with respect to the guide rod 31. Specifically, the guide assembly 30 includes a guide rod 31 arranged in the vertical direction, that is, the guide rod 31 is perpendicular to the liquid level, the first unit 11 to be measured and the second unit 12 to be measured can slide relative to the guide rod 31, and the guide rod 31 guides the first unit 11 to be measured and the second unit 12 to be measured to move along the vertical direction, so that the first unit 11 to be measured and the second unit 12 to be measured can move more stably, and the working accuracy and reliability of the liquid level meter 100 are improved.
Further, the guide rod 31 is provided with a slide rail 311, the first unit under test 11 is provided with a first slide groove 111 adapted to the slide rail 311, and the second unit under test 12 is provided with a second slide groove 121 adapted to the slide rail 311. Specifically, the slide rail 311 is disposed along the extending direction of the guide rod 31, the cross section of the slide rail 311 is matched with the cross sections of the first slide groove 111 and the second slide groove 121, the slide rail 311 is slidably connected with the first slide groove 111, and the slide rail 311 is slidably connected with the second slide groove 121.
Further, the slide rail 311 is provided on an outer surface of the guide bar 31. The first sliding slot 111 is a through hole penetrating through the first unit under test 11, and the first unit under test 11 is sleeved on the guide rod 31. The second sliding slot 121 is a through hole penetrating through the second unit under test 12, and the second unit under test 12 is sleeved on the guide rod 31. The entire outer surface of the guide bar 31 is used as a slide rail 311, and accordingly, the first slide groove 111 is a through hole penetrating the first unit under test 11. The guide rod 31 may be a rod type such as a round rod or a square rod, and the corresponding through hole may be a hole type such as a round hole or a square hole, and in this embodiment, the guide rod 31 is explained by selecting a round rod and a through hole by selecting a round hole. The aperture of the through hole is slightly larger than the outer diameter of the guide rod 31, the guide rod 31 passes through the first sliding chute 111 and the second sliding chute 121, so that the first unit under test 11 and the second unit under test 12 are sleeved on the guide rod 31, and the first unit under test 11 and the second unit under test 12 can slide along the guide rod 31. The guide structure is compact in structure, convenient to install and convenient to maintain in later period.
In some alternative embodiments, the length of the guide rod 31 is greater than or equal to the total range of the fluid level gauge 100. Since the first unit 11 moves up and down with the rise and fall of the liquid level, the movement distance of the first unit 11 on the guide rod 31 is greater than or equal to the total range of the liquid level meter 100, and in order to guide the movement of the first unit 11 and the second unit 12, the length of the guide rod 31 is set to be greater than or equal to the total range of the liquid level meter 100.
Referring to fig. 5, in some alternative embodiments, the guide assembly 30 includes a guide tube 32 arranged in a vertical direction, and the first unit under test 11 and the second unit under test 12 are slidable in the guide tube 32. Specifically, the guide assembly 30 includes the guide tube 32 that vertical direction arranged, that is, the guide tube 32 is perpendicular to the liquid level, the first unit 11 to be measured and the second unit 12 to be measured are located in the guide tube 32 and can slide relative to the guide tube 32, the guide tube 32 guides the first unit 11 to be measured and the second unit 12 to be measured to move along the vertical direction, so that the moving directions of the first unit 11 to be measured and the second unit 12 to be measured are more stable, and the working accuracy and reliability of the liquid level meter 100 are improved.
Further, an inner sliding groove 321 is arranged in the guide pipe 32, the first unit under test 11 is provided with a first sliding block 112 matched with the inner sliding groove 321, and the second unit under test 12 is provided with a second sliding block 122 matched with the inner sliding groove 321. In order to stabilize the movement state of the first unit under test 11 and the second unit under test 12 in the guide tube 32, not only to keep the movement direction stable, an inner slide groove 321 is provided in the guide tube 32, and the inner slide groove 321 extends in the arrangement direction of the guide tube 32, that is, the inner slide groove 321 is arranged in the vertical direction. The first unit under test 11 is provided with the first sliding block 112, the second unit under test 12 is provided with the second sliding block 122, and the first unit under test 11 and the second unit under test 12 can slide relative to the inner sliding groove 321, so that the moving states of the first unit under test 11 and the second unit under test 12 in the guide tube 32 can be kept stable and will not roll in the guide tube 32.
In some alternative embodiments, the length of the guide tube 32 is greater than or equal to the total range of the fluid level gauge 100. Since the first unit 11 moves up and down along with the rise and fall of the liquid level, the movement distance of the first unit 11 in the guide tube 32 is greater than or equal to the total measuring range of the liquid level meter 100, and in order to enable the first unit 11 and the second unit 12 to be measured to be guided in movement, the length of the guide tube 32 is set to be greater than or equal to the total measuring range of the liquid level meter 100.
In some alternative embodiments, the connecting member 13 comprises a rigid connecting string, one end of which is connected to the first unit under test 11, and the other end of which is connected to the second unit under test 12. Specifically, the connecting member 13 includes a rigid connecting rope, after the first unit under test 11 moves to the first height, the first unit under test 11 pulls the second unit under test 12 to move upward through the connecting member 13, and the rigid connecting rope does not change in length due to stress, so that the distance between the first unit under test 11 and the second unit under test 12 is kept constant, and the measurement stability of the liquid level meter 100 is improved.
Referring to fig. 1-2, in some alternative embodiments, the connecting member 13 includes a connecting rod 131, a top portion 132 is disposed at a position of the connecting rod 131 near the top end, the second unit under test 12 is fastened to the connecting rod 131, the first unit under test 11 is disposed between the second unit under test 12 and the top portion 132, and the first unit under test 11 can slide relative to the connecting rod 131. Specifically, a top part 132 is arranged at a position of the connecting rod 131 close to the top end, the second unit to be measured 12 is fixedly connected with the connecting rod 131, the first unit to be measured 11 is arranged between the second unit to be measured 12 and the top part 132, and the first unit to be measured 11 moves between the second unit to be measured 12 and the top part 132. The abutting portion 132 is provided with a sliding hole 133 adapted to the guide rod 31 so that the connecting member 13 can slide relative to the guide rod 31. When the first unit 11 floats upwards to abut against the abutting part 132 along with the liquid level, the first unit 11 drives the connecting rod 131 to move upwards together, the second unit 12 fixed on the connecting rod 131 moves upwards along with the connecting rod 131, and the detection device 20 detects that the movement of the second unit 12 can also reflect the movement position of the first unit 11, i.e. can generate a liquid level measurement signal.
Further, the second unit under test 12 is fastened to the bottom end of the connecting rod 131, and the abutting portion 132 is formed by bending the top end of the connecting rod 131. In order to fully utilize the length of the connecting rod 131, the second unit 12 to be measured is fastened to the bottom end of the connecting rod 131, and the abutting portion 132 is formed by bending the top end of the connecting rod 131, so that the processing and manufacturing are convenient.
Referring to fig. 2 and fig. 6 to 8, in some alternative embodiments, the measuring range of the measuring device 20 is 1/N times of the total measuring range of the liquid level meter 100, where N is a positive integer greater than or equal to 3. The number of measuring assemblies 10 is N-1, and the maximum distance between the first unit under test 11 and the second unit under test 12 of the Mth measuring assembly 10 is M/N times the total range of the liquid level meter 100, wherein M is [1, N ].
To increase the total range of the fluid level gauge 100, the technical effect of increasing the total range of the fluid level gauge 100 can be achieved by increasing the number of measurement assemblies 10 without increasing the sensing range of the sensing device 20. The total range is increased by N times, wherein N is a positive integer greater than or equal to 2. N-1 sets of measuring assemblies 10 are added, and the maximum distance between the first unit under test 11 and the second unit under test 12 of the mth measuring assembly 10, i.e. the first height of the mth measuring assembly 10, is the distance between the first unit under test 11 and the second unit under test 12.
Referring to FIGS. 6-8, for example, when it is desired to double the total range of the liquid level meter 100, the measuring range of the measuring device 20 is 1/2 times the total range of the liquid level meter 100. A first set of measurement assemblies 10A is provided, wherein the first set of measurement assemblies 10A includes a first unit under test 11A, a second unit under test 12A and a connector 13A. The length value of the connecting piece 13A is equal to the first height value, so that when the first unit to be measured 11A floats to the first height, the first unit to be measured 11A can drive the connecting piece 13A to move upwards, namely, the second unit to be measured 12A on the connecting piece 13A is driven to move upwards. After the first unit under test 11A exceeds the detection range of the detection device 20, and the second unit under test 12A is still in the detection range of the detection device 20, the detection device 20 can also detect the movement of the second unit under test 12A to generate a liquid level measurement signal.
When it is desired to increase the total range of the gauge 100 by a factor of 2, the sensing range of the sensing device 20 is 1/3 times the total range of the gauge 100. It is desirable to add a second set of measuring elements 10B to the above embodiment, where the first height of the second set of measuring elements 10B is 2/3 times the total range. I.e. the length of the connecting element 13B of the second set of measuring elements 10B amounts to 2/3 times the total measuring range.
Referring to fig. 6, when the liquid level is within the detection range of the detection device 20, the detection device 20 can detect when the first unit under test 11A of the first set of measurement components 10A and the first unit under test 11B of the second set of measurement components 10B are both within the detection range of the detection device 20.
Referring to fig. 7, when the liquid level is outside the range of the detecting device 20, which is about 1/2 total range, the first unit under test 11A of the first set of measuring components 10A drives the second unit under test 12A of the first set of measuring components 10A to move upward. At this time, the second unit under test 12A of the first set of measuring components 10A is not out of the detection range, and the level measuring signal can be generated by detecting the second unit under test 12A of the first set of measuring components 10A.
Referring to FIG. 8, when the liquid level is at a position of about 2/3 total range, the first set of measuring components 10A is outside the sensing range, and the first unit under test 11B of the second set of measuring components 10B is outside the sensing range. The first measured unit 11B of the second set of measuring component 10B abuts against the connecting member 13B of the second set of measuring component 10B, the connecting member 13B is pushed to float upwards, so as to drive the second measured unit 12B arranged on the connecting member 13B to float upwards, the second measured unit 12B is located in the detection range, and the detecting device 20 generates a liquid level measuring signal by detecting the second measured unit 12B of the second measuring component 10B. By analogy, the total amount of travel is doubled by adding the number of measuring elements 10.
Referring to fig. 1-2, in some alternative embodiments, the first unit under test 11 includes a first magnet, the second unit under test 12 includes a second magnet, and the magnetic force generated by the first magnet is not equal to the magnetic force generated by the second magnet. Detection device 20 is formed by a plurality of hall sensor 21 range, and in order to be convenient for distinguish first unit under test 11 and second unit under test 12, set up first magnet at first unit under test 11, set up the second magnet at second unit under test 12, and the magnetic field intensity of first magnet is not the same with the magnetic field intensity of second magnet. It may be that the magnetic field strength of the first magnet is greater than the magnetic field strength of the second magnet, or that the magnetic field strength of the first magnet is less than the magnetic field strength of the second magnet.
Further, the detecting device 20 includes a plurality of hall sensors 21, and the plurality of hall sensors 21 are arranged in a vertical direction. The detection device 20 comprises a plurality of Hall sensors 21, the vertical direction is the direction perpendicular to the liquid level, when the detection device 20 is arranged perpendicular to the liquid level, the length of the detection device 20 is the shortest, and the detection efficiency is the highest.
In some alternative embodiments, the direction of the magnetic field of the first magnet is opposite to the direction of the magnetic field of the second magnet. In order to prevent the first unit under test 11 and the second unit under test 12 from being attracted together when the liquid level is low, the direction of the magnetic field of the first magnet is opposite to the direction of the magnetic field of the second magnet.
In some optional embodiments, in order to prevent the first measured unit 11 and the second measured unit 12 from being adsorbed together when the liquid level is low, a limiting portion 14 is disposed between the first measured unit 11 and the second measured unit 12, and the limiting portion 14 is used to separate the first measured unit 11 from the second measured unit 12 and prevent the first measured unit 11 from being adsorbed to the second measured unit 12. The position-limiting portion 14 is made of a non-magnetic material, and may be made of plastic or non-magnetic stainless steel. The stopper portion 14 may be fixed to the first unit under test 11 or the second unit under test 12 as long as the first unit under test 11 and the second unit under test 12 can be separated from each other.
Further, the limiting part 14 is a cylinder, the lower end of the limiting part 14 is connected with the second tested unit 12, and the upper end of the limiting part 14 extends upwards. The limiting part 14 is cylindrical, the lower end of the limiting part 14 is fixed on the second tested unit 12, the limiting part 14 extends upwards from the second tested unit 12, and one end of the limiting part 14, which is far away from the second tested unit 12, is used for abutting against the first tested unit 11.
In some alternative embodiments, the second unit under test 12 comprises a float having a buoyancy that generates less buoyancy than the weight of the second unit under test 12. In order to make the first unit under test 11 more easily drive the second unit under test 12 to move, a float is provided in the second unit under test 12, and the buoyancy generated by the float is smaller than the gravity of the second unit under test 12, so that the second unit under test 12 is more easily pulled.
Fig. 9 is a schematic structural diagram of an unmanned aerial vehicle according to an embodiment of the present invention; FIG. 10 is an exploded view of FIG. 9; fig. 11 is a schematic cross-sectional view of fig. 9.
Referring to fig. 2 and 9-11, an embodiment of the present invention provides a spraying assembly (not shown), including: a tank 200 for holding a liquid, a liquid driving device (not shown) in communication with the tank 200, a spray head assembly (not shown) in communication with the liquid driving device, and the fluid level gauge 100 provided in the above embodiments, the fluid level gauge 100 being at least partially disposed within the tank 200.
The water tank 200 is a container filled with liquid, the liquid driving device is electrically connected with the controller, the liquid driving device sucks the liquid in the water tank 200 and pressurizes the liquid, and the liquid is conveyed to the spray head assembly, and the spray head assembly can change the spray amplitude and the liquid flow and is used for spraying the liquid such as pesticide, chemical fertilizer, water and the like. The liquid level meter 100 can improve the spraying precision and detect the residual dosage in time, thereby providing a foundation for realizing the functions of reasonably planning a route, continuing a journey after breaking the chemicals and the like.
Furthermore, the first unit under test 11, the second unit under test 12, the connector 13 and the detection device 20 are all disposed in the water tank 200, and the detection device 20 extends from the lowest point of the liquid level of the liquid along the height direction of the water tank 200. In some embodiments, the detection device 20 is disposed in the water tank 200, the detection device 20 is powered wirelessly and communicates wirelessly, the detection device 20 is closer to the measurement assembly 10, and the detection is more accurate and sensitive.
In some alternative embodiments, the first unit under test 11, the second unit under test 12 and the connecting member 13 are disposed in the water tank 200, the detecting device 20 is disposed outside the water tank 200, and the detecting device 20 extends from the lowest point of the liquid level along the height direction of the water tank 200. The detection device 20 is disposed outside the water tank 200, i.e., on a body on which the water tank 200 is mounted. The detection device 20 can be directly connected with the controller by a lead, so that the cost is reduced, and the signal stability is improved. In order to increase the capacity of the water tank 200, the water tank 200 is generally designed to be higher than the body, and the water tank 200 is not provided with the detection device 20 at a corresponding position of the body. By providing the measuring assembly 10 in the above-described embodiment, a technical effect of detecting the water tank 200 higher than the body portion is achieved.
Fig. 9 is a schematic structural diagram of an unmanned aerial vehicle according to an embodiment of the present invention; FIG. 10 is an exploded view of FIG. 9; fig. 11 is a schematic cross-sectional view of fig. 9.
Referring to fig. 9 to 11, an embodiment of the present invention provides an unmanned aerial vehicle, which includes a central body 310, a horn 320 and a propeller 330, wherein the central body 310 includes the spraying assembly provided in the above embodiments, one end of the horn 320 is connected to the central body 310, and the other end of the horn 320 is connected to the propeller 330.
Specifically, the water tank 200 is installed on the central body 310, and the water tank 200 contains liquid such as pesticide, fertilizer, water, etc. required for spraying. A plurality of arms 320 extend outward from the central body 310, the plurality of arms 320 are centered on the central body 310, the plurality of arms 320 are uniformly distributed along the circumferential direction of the heading axis, and the plurality of arms 320 are provided with propellers 330.
Further, the central body 310 includes a housing 311, the housing 311 is provided with a mounting position 312 for mounting the water tank 200, and the detecting device 20 is provided on the housing 311. The outer casing 311 of the central body 310 is provided with a mounting position 312 for loading the water tank 200, the mounting position 312 is used for mounting and fixing the water tank 200, and the water tank 200 is prevented from moving in the movement process of the unmanned aerial vehicle, the mounting position 312 may be a fixing bracket or a fixing groove, the fixing bracket is taken as an example in the embodiment and comprises a plurality of fixing rods, one ends of the fixing rods are fixed with the outer casing 311 through screws, and the other ends of the fixing rods are fixed with the water tank 200 through screws.
In some alternative embodiments, the mounting position 312 includes a mounting groove 313, the shape of the mounting groove 313 is matched with the shape of the water tank 200, and the detecting device 20 is disposed on the wall of the mounting groove 313. Specifically, the shape of the mounting groove 313 is matched with the shape of the water tank 200, the mounting groove 313 is arranged at the top of the shell 311, the water tank 200 can be directly placed into the mounting groove 313 from the upper side of the shell 311, the detection device 20 is arranged on the wall of the mounting groove 313, after the water tank 200 is placed into the mounting groove 313, the detection device 20 automatically reaches the working position, and the liquid level meter 100 can normally measure.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (15)
1. A fluid level gauge, comprising:
the measuring assembly comprises a first measured unit capable of floating on liquid, a second measured unit capable of sinking on the liquid and a connecting piece; the connecting piece is configured to flexibly connect the first unit to be tested and the second unit to be tested, and after the first unit to be tested rises to a first height in the liquid, the first unit to be tested can drive the second unit to be tested to float upwards through the connecting piece;
a detection device arranged in a vertical direction, the detection device being configured to be able to detect a position of at least one of the first unit under test and the second unit under test and to generate a liquid level measurement signal based on the detected position information.
2. The fluid level gauge of claim 1, wherein the first height is less than or equal to a sensing range of the sensing device.
3. The fluid level gauge according to claim 2, wherein the total predetermined range of the fluid level gauge is equal to twice the measuring range of the measuring device, the first height is equal to the measuring range of the measuring device, and the length of the connecting member between the first unit under test and the second unit under test is equal to the first height.
4. The gauge according to any of claims 1-3, further comprising a guiding assembly for guiding the direction of movement of the first and second units under test.
5. The gauge of claim 4, wherein the guide assembly comprises a guide bar arranged in a vertical direction, the first and second units under test being slidable relative to the guide bar.
6. The liquid level gauge according to claim 5, wherein the guide rod is provided with a slide rail, the first unit under test is provided with a first slide groove adapted to the slide rail, and the second unit under test is provided with a second slide groove adapted to the slide rail.
7. The fluid level gauge of claim 6, wherein the slide rail is disposed on an outer surface of the guide bar;
the first sliding groove is a through hole penetrating through the first unit to be tested, and the first unit to be tested is sleeved on the guide rod;
the second sliding groove is a through hole penetrating through the second tested unit, and the second tested unit is sleeved on the guide rod.
8. The gauge of claim 4, wherein the guide assembly comprises a guide tube arranged in a vertical direction, the first unit under test and the second unit under test being slidable within the guide tube.
9. A gauge according to any of claims 1-3, wherein the connecting member comprises a rigid connecting cord, one end of which is connected to the first unit under test and the other end of which is connected to the second unit under test.
10. The liquid level gauge according to any one of claims 1 to 3, wherein the connecting member comprises a connecting rod, and a top abutting portion is arranged at a position of the connecting rod close to the top end; the second unit to be tested is fastened on the connecting rod; the first unit to be tested is arranged between the second unit to be tested and the abutting part, and the first unit to be tested can slide relative to the connecting rod.
11. A gauge according to any of claims 1-3, wherein the measuring range of the measuring means is 1/N times the total measuring range of the gauge, wherein N is a positive integer greater than or equal to 3;
the number of the measuring assemblies is N-1, and the maximum distance between the first measured unit and the second measured unit of the Mth measuring assembly is M/N times of the total measuring range of the liquid level meter, wherein M belongs to [1, N ].
12. A gauge according to any of claims 1-3, wherein the first unit under test comprises a first magnet and the second unit under test comprises a second magnet, the magnetic force generated by the first magnet being unequal to the magnetic force generated by the second magnet.
13. The fluid level gauge according to claim 12, wherein a spacing portion is disposed between the first unit under test and the second unit under test, and the spacing portion is configured to separate the first unit under test from the second unit under test and prevent the first unit under test from being attracted to the second unit under test.
14. A spray assembly comprising a tank for holding a liquid, a liquid drive in communication with the tank, a spray head assembly in communication with the liquid drive, and a fluid level gauge according to any of claims 1-13, the fluid level gauge being at least partially disposed within the tank.
15. An unmanned aerial vehicle comprising a central body including the spray assembly of claim 14, an arm connected at one end to the central body and a propeller connected at the other end to the propeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020972513.XU CN212058988U (en) | 2020-06-01 | 2020-06-01 | Level gauge, spraying assembly and unmanned aerial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020972513.XU CN212058988U (en) | 2020-06-01 | 2020-06-01 | Level gauge, spraying assembly and unmanned aerial vehicle |
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| CN212058988U true CN212058988U (en) | 2020-12-01 |
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| CN202020972513.XU Expired - Fee Related CN212058988U (en) | 2020-06-01 | 2020-06-01 | Level gauge, spraying assembly and unmanned aerial vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021243506A1 (en) * | 2020-06-01 | 2021-12-09 | 深圳市大疆创新科技有限公司 | Liquid level meter, spraying assembly, and unmanned aerial vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021243506A1 (en) * | 2020-06-01 | 2021-12-09 | 深圳市大疆创新科技有限公司 | Liquid level meter, spraying assembly, and unmanned aerial vehicle |
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