CN113167631A - Liquid level meter, measuring method thereof, spraying assembly and unmanned aerial vehicle - Google Patents
Liquid level meter, measuring method thereof, spraying assembly and unmanned aerial vehicle Download PDFInfo
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- CN113167631A CN113167631A CN202080005286.6A CN202080005286A CN113167631A CN 113167631 A CN113167631 A CN 113167631A CN 202080005286 A CN202080005286 A CN 202080005286A CN 113167631 A CN113167631 A CN 113167631A
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- 239000007788 liquid Substances 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005507 spraying Methods 0.000 title claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 16
- 235000014676 Phragmites communis Nutrition 0.000 claims description 8
- 238000000691 measurement method Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 3
- 238000005259 measurement Methods 0.000 abstract description 19
- 239000011550 stock solution Substances 0.000 description 15
- 238000001514 detection method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 239000000575 pesticide Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
A liquid level gauge (10) includes a stationary magnet (200), a moving magnet (300), and a detector (100). The fixed magnet (200) is fixed at the bottom of the liquid storage device (700), the movable magnet (300) is arranged in the liquid storage device (700) and is configured to move along with the change of the liquid storage level, and the detector (100) is configured to detect the positions of the fixed magnet (200) and the movable magnet (300) so as to obtain the liquid storage level. The liquid level meter (10) can obtain accurate measurement results according to the positions of the fixed magnet (200) and the movable magnet (300) no matter how the relative positions of the detector (100) and the liquid storage device (700) change. A measuring method of the liquid level meter (10), a spraying assembly (20) and a unmanned aerial vehicle (30) are also provided.
Description
Technical Field
The application relates to the technical field of liquid level meters, in particular to a liquid level meter, a measuring method of the liquid level meter, a spraying assembly and an unmanned aerial vehicle.
Background
The liquid level meter in the related art has only one moving magnet moving with the liquid level and a detector for detecting the position of the moving magnet, however, the detector of the liquid level meter can only be fixed with the position of the liquid storage device, and the measurement result is inaccurate when the relative position of the detector and the liquid storage device changes.
Disclosure of Invention
The embodiment of the application provides a liquid level meter, a measuring method of the liquid level meter, a spraying assembly and an unmanned aerial vehicle.
In a first aspect, an embodiment of the present application provides a liquid level meter, including: the fixed magnet is fixed at the bottom of the liquid storage device; the movable magnet is arranged in the liquid storage device and is configured to move along with the change of the liquid level of the liquid storage device; a detector configured to detect the position of the stationary magnet and the moving magnet, thereby obtaining the liquid level of the liquid reservoir.
In a second aspect, embodiments of the present application provide a spray assembly, including: the liquid storage device is internally provided with a liquid storage cavity for containing liquid; the fixed magnet is fixed at the bottom of the liquid storage cavity; the movable magnet is arranged in the liquid storage cavity and is configured to move along with the change of the liquid level of the liquid; a detector configured to detect positions of the fixed magnet and the moving magnet, thereby obtaining a liquid level of the liquid.
In a third aspect, an embodiment of the present application provides an unmanned aerial vehicle, including: the liquid storage device is internally provided with a liquid storage cavity for containing liquid, and the liquid storage device is detachably mounted on the unmanned aerial vehicle body; the detector is fixed in an area, corresponding to the liquid storage device, of the unmanned aerial vehicle body; the fixed magnet is fixed at the bottom of the liquid storage cavity; the movable magnet is arranged in the liquid storage cavity and is configured to move along with the change of the liquid level of the liquid; the detector is configured to detect the positions of the fixed magnet and the moving magnet, thereby obtaining the level of the liquid.
In a fourth aspect, an embodiment of the present application provides a measurement method of a liquid level meter, where the liquid level meter includes: the fixed magnet is fixed at the bottom of the liquid storage device; the movable magnet is arranged in the liquid storage device; a detector configured to detect positions of the fixed magnet and the moving magnet; and the measuring method comprises the following steps: acquiring the positions of the fixed magnet and the moving magnet detected by the detector; and obtaining the liquid storage level of the liquid storage device according to the positions of the fixed magnet and the movable magnet.
Since the position of the fixed magnet indicates the position of the bottom of the liquid and the position of the movable magnet indicates the position of the liquid level of the liquid, an accurate measurement result can be obtained from the position of the fixed magnet and the position of the movable magnet regardless of the change in the relative positions of the detector and the liquid storage device. The application provides a this kind of level gauge and measuring method, spray subassembly and unmanned aerial vehicle can mark stock solution device's mounting height to compensation measurement result guarantees measurement result's accuracy.
Drawings
FIG. 1 is a schematic structural view of a liquid level gauge according to an embodiment of the present application;
FIG. 2 is a block diagram of a fluid level gauge according to another embodiment of the present application;
FIG. 3 is a schematic view of the detector of the fluid level gauge shown in FIG. 2 in a first positional relationship with the reservoir;
FIG. 4 is a schematic view of the detector of the fluid level gauge shown in FIG. 2 in a second positional relationship with the reservoir;
FIG. 5 is a block diagram of a spray assembly according to one embodiment of the present application;
fig. 6 is a block diagram of a drone according to one embodiment of the present application;
FIG. 7 is a schematic view of a measurement method of a level gauge according to an embodiment of the present application.
In the figure, 10 is the level gauge, 100 is the detector, 200 is fixed magnet, 300 is the removal magnet, 400 is the mounting, 500 is the removal magnet setting element, 600 is the fixed magnet setting element, 20 is for spraying the subassembly, 700 is the stock solution device, 30 is unmanned aerial vehicle, 800 is the fuselage.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
A fluid level gauge 10 is provided in an embodiment of the present application, and FIG. 1 is a schematic structural view of the fluid level gauge 10 according to an embodiment of the present application (a fluid reservoir 700 is shown in FIG. 1 in addition to the fluid level gauge 10).
The gauge 10 includes a stationary magnet 200, a moving magnet 300, and a detector 100.
The fixed magnet 200 is fixed to the bottom of the reservoir 700. in some embodiments, the fixed magnet 200 can be fixed to the bottom inside the reservoir 700, and in other embodiments, the fixed magnet 200 can be fixed to the bottom outside the reservoir 700.
The moving magnet 300 is disposed within the reservoir 700 and is configured to move with changes in the level of the reservoir. The moving magnet 300 may be a magnetic float that floats on the surface of the liquid.
The detector 100 is configured to detect the position of the stationary magnet 200 and the moving magnet 300, thereby obtaining the liquid reservoir level.
In some embodiments of the present application, the detector 100 may be fixed to an object other than the reservoir 700. For example, when the liquid storage device 700 is disposed on the body 800 of the drone 30, the detector 100 may be fixed to the body 800 of the drone 30, and when the liquid storage device 700 is disposed on the ground, the detector 100 may be fixed to the ground. Fixing the detector 100 to another object outside the liquid storage device 700 instead of the liquid storage device 700 facilitates electrical connection and communication of the detector 100, and facilitates operations such as installation, maintenance, battery replacement, etc. of the detector 100, resulting in a low cost and high reliability of the liquid level gauge 10.
In other embodiments of the present disclosure, the detector 100 is removably disposed on the reservoir 700, for example, removably disposed outside the reservoir 700 or inside the reservoir 700. In other embodiments of the present application, the detector 100 may not be mounted on any object, and when the measurement is needed, the user only needs to hold the detector 100 by hand to locate the liquid storage device 700 within the measurement range of the detector 100.
The position of the fixed magnet 200 may include a fixed magnet relative height of the fixed magnet 200 with respect to a reference point fixed in positional relationship with the detector 100, and the position of the moving magnet 300 includes a moving magnet relative height of the moving magnet 300 with respect to the reference point. The reference point may be a point which has a fixed positional relationship with the detector 100 and is located within the detection range of the detector 100, or may be a point which is located outside the detection range of the detector 100.
As shown in fig. 1, the reference point may be a point a located outside the detection range of the detector 100, and the relative height of the stationary magnet 200 with respect to the point a is a. The relative height a0 between the fixed magnet 200 and any point in the detection range of the detector 100 (for convenience of explanation, this point is taken as the bottommost point B of the detector 100), and the relative height between the reference point and the point B is a fixed value g (the relative height between the reference point and the point B can be preset), and the fixed magnet relative height a is obtained by adding a0 and g.
The moving magnet relative height B of the moving magnet 300 with respect to the point a is obtained by adding B0 and g, the relative height B0 between the moving magnet 300 and the point B is obtained, and the relative height g between the reference point and the point B is obtained by adding B.
In some embodiments of the present application, the reference point may be selected to be a point at the same height as the fixed magnet 200, and the relative height a of the fixed magnet is 0 for calculation.
Since the fixed magnet 200 is fixed in the reservoir 700 in the embodiment of the present application shown in fig. 1, the reservoir levels are a-b. In other embodiments of the present application, the stationary magnet 200 is fixed outside the reservoir 700, and the reservoir level is a-b-h, where h is the thickness of the bottom wall of the reservoir 700.
It will be understood by those skilled in the art that the reference point may be selected from other points besides point a in fig. 1, for example, the bottom-most point of the detector 100, the top-most point of the detector 100, the middle point of the detector 100, or any point on the fuselage 800 of the drone 30 when the detector 100 is fixed to the drone 30, for example, the bottom-most point of the fuselage 800, the top-most point of the fuselage 800, the middle point of the fuselage 800, and so on. Also, the height of the reference point may be above the liquid level, below the liquid level, or equal to the liquid level, etc.
Since the position of the fixed magnet 200 represents the position of the bottom of the liquid and the position of the movable magnet 300 represents the position of the liquid level of the liquid, an accurate measurement result can be obtained according to the position of the fixed magnet 200 and the position of the movable magnet 300 regardless of the change in the relative positions of the detector 100 and the liquid storage device 700, and it can be understood by those skilled in the art that the change in the relative positions of the detector 100 and the liquid storage device 700 includes the change in the relative position of the liquid storage device 700 with respect to the detector 100, for example, the change in the installation position of the liquid storage device 700 when the detector 100 is fixed; changes in the relative position of detector 100 to reservoir 700 also include changes in the relative position of detector 100 to reservoir 700, for example, changes in the position of detector 100 when the position of reservoir 700 is fixed; such a gauge 10 provides accurate measurements whether the relative position of the reservoir 700 with respect to the detector 100 changes or whether the relative position of the detector 100 with respect to the reservoir 700 changes. The liquid level meter 10 of the embodiment of the application calibrates the installation height of the liquid storage device 700 to compensate the measurement result, thereby ensuring the accuracy of the measurement result.
In some embodiments of the present application, the detector 100 may include a plurality of hall sensors 110. FIG. 2 is a block diagram of the structure of a fluid level gauge 10 according to another embodiment of the present application.
Among the plurality of hall sensors 110, the hall sensor 110 corresponding to the fixed magnet 200 is used to detect the position of the fixed magnet 200, and among the plurality of hall sensors 110, the hall sensor 110 corresponding to the moving magnet 300 is used to detect the position of the moving magnet 300.
It will be understood by those skilled in the art that any one of the plurality of hall sensors 110 may be used to detect the position of the fixed magnet 200, and any one of the plurality of hall sensors 110 may also be used to detect the position of the moving magnet 300.
That is, when the detector 100 of the fluid level gauge 10 is different in positional relationship from the reservoir 700, the position of the fixed magnet 200 is detected by a different one of the plurality of hall sensors 110, and the hall sensor that detects the position of the fixed magnet 200 is the one hall sensor 110 that corresponds to the position of the fixed magnet 200. When the detector 100 of the fluid level gauge 10 is in a different positional relationship with the reservoir 700 or the fluid level is different, the position of the moving magnet 300 is detected by a different one of the plurality of hall sensors 110, and the hall sensor that detects the position of the moving magnet 300 is the one hall sensor 110 that corresponds to the position of the moving magnet 300.
FIG. 3 is a schematic view of the detector 100 of the fluid level gauge 10 shown in FIG. 2 in a first positional relationship with the reservoir 700, and FIG. 4 is a schematic view of the detector 100 of the fluid level gauge 10 shown in FIG. 2 in a second positional relationship with the reservoir 700.
As shown in fig. 3 and 4, the plurality of hall sensors 110 include a hall sensor 110-1, a hall sensor 110-2, a hall sensor 110-3, a hall sensor 110-4, a hall sensor 110-5, a hall sensor 110-6, a hall sensor 110-7, a hall sensor 110-8, and a hall sensor 110-9, and those skilled in the art will understand that in other embodiments of the present application, the plurality of hall sensors 110 may be in other numbers.
In fig. 3, the detector 100 of the liquid level meter 10 and the liquid storage device 700 are located at the first position, the hall sensor 110 corresponding to the fixed magnet 200 in the plurality of hall sensors 110 is the hall sensor 110-8, and then the hall sensor 110-8 is used for detecting the position of the fixed magnet 200, and the hall sensor 110 corresponding to the moving magnet 300 in the plurality of hall sensors 110 is the hall sensor 110-4, and then the hall sensor 110-4 is used for detecting the position of the moving magnet 300.
In fig. 4, the detector 100 of the liquid level meter 10 and the liquid storage device 700 are located at the second position, the hall sensor 110 corresponding to the fixed magnet 200 in the plurality of hall sensors 110 is the hall sensor 110-7, the hall sensor 110-7 is used for detecting the position of the fixed magnet 200, the hall sensor 110 corresponding to the moving magnet 300 in the plurality of hall sensors 110 is the hall sensor 110-3, and the hall sensor 110-3 is used for detecting the position of the moving magnet 300.
The fluid level gauge 10 may include a fixing member 400, the fixing member 400 connecting the plurality of hall sensors 110 and fixing the plurality of hall sensors 110. That is, the fixing member 400 connects and fixes the plurality of hall sensors 110 to the fixing member 400 itself, so that the relative positions of the plurality of hall sensors 110 are fixed, and the occurrence of inaccurate measurement results due to the relative position change among the plurality of hall sensors 110 is avoided.
The fixing member 400 may include a fixing member fixing structure, and the fixing member fixing structure may mount the fixing member 400 on another object outside the liquid storage device 700, such as the fuselage 800 of the unmanned aerial vehicle 30, and the fixing member fixing structure may also detachably mount the fixing member 400 on the liquid storage device 700, such as outside the liquid storage device 700 or inside the liquid storage device 700, and the like. In other embodiments of the present application, the fixing member 400 may further include a handle to facilitate the use of the hand-held detector 100.
In some embodiments of the present application, the fixing member 400 may be a fixing tube, and the plurality of hall sensors 110 are distributed along an axial direction of the fixing tube. The fixing member 400 of such a shape facilitates the arrangement of the plurality of hall sensors 110 in the same direction. It will be understood by those skilled in the art that the fixing member 400 may have other shapes, such as a plate shape, and the like, and the plurality of hall sensors 110 may be distributed in one direction on one plane of the plate-shaped fixing member 400.
The plurality of hall sensors 110 are distributed on the outer surface of the stationary member 400. Thereby facilitating the installation, detachment, and maintenance of the plurality of hall sensors 110, and enabling the plurality of hall sensors 110 to detect the position of the moving magnet 300 or the fixed magnet 200.
In some embodiments of the present application, the plurality of hall sensors 110 may be evenly distributed at equal intervals. When the plurality of hall sensors 110 are uniformly distributed at equal intervals, and the distance between every two adjacent hall sensors 110 is constant, the liquid level meter 10 may store the distance between two adjacent hall sensors 110 in advance, and at this time, only one numerical value needs to be stored in advance.
This arrangement makes the fixed magnet relative height a and the moving magnet relative height b easy to calculate. For example, as shown in fig. 3, when the reference point is a point located at the same height as the hall sensor 110-8, and the relative height a of the fixed magnet is 0, the relative height b of the moving magnet only needs to obtain the liquid storage level according to the pre-stored distance between two adjacent hall sensors 110 and the number of hall sensors 110 between the hall sensor 110-8 and the hall sensor 110-4, for example, the pre-stored distance between two adjacent hall sensors 110 is L0When the relative height b of the moving magnet is L0X 4, the liquid level of the stock solution is L0X 4-0, i.e. L0X 4. It will be understood by those skilled in the art that when the reference point is not a point located at the same height as the hall sensor 110-8, such as another point having a relative height c with respect to the hall sensor 110-8 (c takes a positive value when the hall sensor 110-8 is above the reference point and takes a negative value when the hall sensor 110-8 is below the reference point), then the fixed magnet relative height a is 0+ c and the moving magnet relative height b is L0X 4+ c, the liquid level of the stock solution is L0X 4+ c- (0+ c), i.e. L0×4。
In other embodiments of the present application, the pluralityThe Hall sensors 110 may be distributed at unequal intervals, and the distance between every two adjacent Hall sensors 110 may be pre-stored by the liquid level meter 10. As shown in FIG. 4, when the reference point is a point located at the same height as the Hall sensor 110-7, the relative height a of the fixed magnet is 0, and the relative height b of the moving magnet is determined according to the pre-stored distance L between the Hall sensor 110-3 and the Hall sensor 110-41Distance L between Hall sensor 110-4 and Hall sensor 110-52Distance L between Hall sensor 110-5 and Hall sensor 110-63Distance L between Hall sensor 110-6 and Hall sensor 110-74The relative height b of the moving magnet is L1+L2+L3+L4When the liquid level of the stock solution is L1+L2+L3+L40, i.e. L1+L2+L3+L4. It will be understood by those skilled in the art that when the reference point is not a point located at the same height as the hall sensor 110-7, for example, other points having a relative height d (when the hall sensor 110-8 is above the reference point, d takes a positive value, and when the hall sensor 110-8 is below the reference point, d takes a negative value) with respect to the hall sensor 110-7, then the fixed magnet relative height a is 0+ d, and the moving magnet relative height b is L1+L2+L3+L4+ d, the liquid level of the liquid storage is L1+L2+L3+L4+ d- (0+ d), i.e. L1+L2+L3+L4。
The detector 100 may also include a reed switch. The reed pipe can also detect the positions of the fixed magnet 200 and the movable magnet 300, so that the liquid storage level can be obtained according to the positions of the fixed magnet 200 and the movable magnet 300 detected by the reed pipe.
The fluid level gauge 10 may further include a moving magnet positioning member 500, and the moving magnet positioning member 500 may be disposed within the reservoir 700 for limiting movement of the moving magnet 300 along the fluid level of the reservoir within the reservoir 700.
In some embodiments of the present application, the movable magnet positioning member 500 may include a movable magnet positioning rod, and the movable magnet 300 is provided with a through hole for passing through the movable magnet positioning rod, so that the movable magnet 300 moves along the axial direction of the movable magnet positioning rod when the liquid level of the liquid storage changes. The fixed magnet 200 may be fixed to the bottom of the moving magnet positioning rod.
The liquid level meter 10 may further include a fixed magnet positioning member 600, and the fixed magnet positioning member 600 is disposed at the bottom of the liquid storage device 700 for fixing the fixed magnet 200. When the fixed magnet 200 is located at the bottom of the liquid storage device 700, the fixed magnet positioning member 600 is disposed at the bottom of the liquid storage device 700, and when the fixed magnet 200 is located at the bottom of the liquid storage device 700, the fixed magnet positioning member 600 is disposed at the bottom of the liquid storage device 700.
The embodiment of the present application further provides a spraying assembly 20, and fig. 5 is a block diagram of the spraying assembly 20 according to an embodiment of the present application.
The spray assembly 20 includes a reservoir 700, a stationary magnet 200, a moving magnet 300, and a detector 100.
The reservoir 700 defines a reservoir cavity therein for containing liquid, and the reservoir 700 may be in various shapes such as a cylinder, a quadrangular prism, a cone, etc., and the embodiment of the present application does not limit the specific shape of the reservoir 700.
The moving magnet 300 is disposed in the liquid storage cavity and configured to move with a change in a level of the liquid.
The detector 100 is configured to detect the positions of the fixed magnet 200 and the moving magnet 300, thereby obtaining the level of the liquid.
The implementation of the detector 100, the movable magnet 300, the liquid storage device 700, and the fixed magnet 200 is similar to that described above, and reference may be made to the above description, which is not repeated herein.
The spraying assembly 20 may further include a fixing member 400, a movable magnet positioning member 500 and a fixed magnet positioning member 600, the movable magnet positioning member 500 may be disposed in the liquid storage cavity, and the fixed magnet positioning member 600 may be disposed at the bottom of the liquid storage cavity. The fixing member 400, the movable magnet positioning member 500 and the fixed magnet positioning member 600 can be implemented in a manner similar to that described above, and reference may be made to the above description, which is not repeated herein.
In other embodiments of the present application, a fixing structure for fixing the magnet 200 is formed at the bottom of the reservoir, and the fixing structure may be a protrusion formed at the bottom of the reservoir. When the fixed magnet 200 is located at the bottom of the liquid storage device 700, the fixing structure is formed at the bottom of the liquid storage device 700, and when the fixed magnet 200 is located at the bottom of the liquid storage device 700, the fixing structure is formed at the bottom of the liquid storage device 700.
An embodiment of the present application further provides an unmanned aerial vehicle 30, and fig. 6 is a block diagram of the unmanned aerial vehicle 30 according to an embodiment of the present application.
The drone 30 includes a liquid storage device 700, a detector 100, a fixed magnet 200, and a moving magnet 300.
A reservoir cavity for containing liquid is defined in the reservoir 700, and the reservoir 700 is detachably mounted to the body 800 of the drone 30.
The detector 100 is fixed to an area of the body 800 of the drone 30 corresponding to the liquid storage device 700. The detector 100 may be fixed to a frame of the fuselage 800 of the drone 30.
The fixed magnet 200 is fixed at the bottom of the reservoir, in some embodiments, the fixed magnet 200 may be fixed at the bottom inside the reservoir 700, and in other embodiments, the fixed magnet 200 is fixed at the bottom outside the reservoir 700.
The moving magnet 300 is disposed in the liquid storage cavity and configured to move with a change in a level of the liquid.
The detector 100 is configured to detect the positions of the fixed magnet 200 and the moving magnet 300, thereby obtaining the level of the liquid.
The implementation of the detector 100, the movable magnet 300, the liquid storage device 700, and the fixed magnet 200 is similar to that described above, and reference may be made to the above description, which is not repeated herein.
The drone 30 may further include a mount 400, the mount 400 being connected to the plurality of hall sensors 110 and fixing the plurality of hall sensors 110 to the body 800 of the drone 30. That is, the mount 400 connects and fixes the plurality of hall sensors 110 to the mount 400 itself, and the mount 400 is fixed to the drone 30. So that the relative positions of the hall sensors 110 are fixed, and the situation that the relative position between the hall sensors 110 changes to cause inaccurate measurement results is avoided. The implementation of the fixing member 400 is similar to that described above, and reference may be made to the above description, which is not repeated herein.
The unmanned aerial vehicle 30 can also be formed with the fixed knot who is used for fixed magnet 200 including the bottom of moving magnet setting element 500 and fixed magnet setting element 600 or stock solution chamber and construct, and moving magnet setting element 500 sets up in the stock solution intracavity, and fixed magnet setting element 600 sets up the bottom in stock solution device 700.
The implementation manners of the movable magnet positioning element 500, the fixed magnet positioning element 600 and the fixing structure are similar to those described above, and reference may be made to the above description, which is not repeated herein.
The drone 30 may be a plant protection machine. This kind of plant protection machine is also called plant protection unmanned aerial vehicle or plant protection unmanned vehicles, can spray the pesticide in the stock solution device 700 when the flight (stock solution device 700 can be the medical kit of plant protection machine promptly) to the realization is sprayed the pesticide of crops and is carried out remote control operation, avoids the operating personnel to expose in the danger of pesticide, very big improvement operating efficiency simultaneously. Along with the progress of plant protection machine spraying work, the liquid level of the pesticide in the liquid storage device 700 can change, when the pesticide sprays, need pull down the liquid storage device 700 to supply the pesticide, install the liquid storage device 700 again, and at this in-process, can not guarantee that the liquid storage device 700 just in time installs predetermined mounted position, if do not have fixed magnet 200 to come to mark the mounted height of liquid storage device 700, thereby compensation measurement result's the accuracy that can't guarantee the measuring result.
This kind of unmanned aerial vehicle 30 that this application embodiment provided does not need extra detection stock solution device 700 to install the detection device of predetermined mounted position to avoid this kind of detection device vibrations to lead to detecting whether stock solution device 700 installs the problem that the detection effect is not good of predetermined mounted position. Moreover, the unmanned aerial vehicle 30 provided by the embodiment of the application can not influence the measurement result even if the liquid storage device 700 is displaced due to vibration in the flying process.
The embodiment of the present application further provides a measuring method of the liquid level meter 10, and the liquid level meter 10 includes a fixed magnet 200, a moving magnet 300 and a detector 100. The fixed magnet 200 is fixed at the bottom of the liquid storage device 700, the fixed magnet 200 can be fixed at the bottom inside the liquid storage device 700, and the fixed magnet 200 can also be fixed at the bottom outside the liquid storage device 700; the movable magnet 300 is arranged in the liquid storage device 700; the detector 100 is configured to detect the positions of the fixed magnet 200 and the moving magnet 300.
FIG. 7 is a schematic illustration of a measurement method of the fluid level gauge 10 according to one embodiment of the present application. The measuring method comprises the following steps:
s702: acquiring the positions of the fixed magnet 200 and the moving magnet 300 detected by the detector 100;
s704: the liquid level of the liquid storage device 700 is obtained according to the positions of the fixed magnet 200 and the movable magnet 300.
Since the position of the fixed magnet 200 represents the position of the bottom of the liquid and the position of the movable magnet 300 represents the position of the liquid surface of the liquid, accurate measurement results can be obtained from the positions of the fixed magnet 200 and the movable magnet 300 regardless of the relative positions of the detector 100 and the liquid storage device 700. The measuring method of the liquid level meter 10 in the embodiment of the application calibrates the installation height of the liquid storage device 700 to compensate the measurement result, so that the accuracy of the measurement result is ensured.
The liquid level meter 10 may be any one of the liquid level meters 10 described above, wherein the detector 100, the movable magnet 300, the liquid storage device 700, and the fixed magnet 200 are implemented in a manner similar to that described above, and reference may be made to the above description, which is not repeated herein.
The position of the fixed magnet 200 may include a fixed magnet relative height of the fixed magnet 200 with respect to a reference point fixed in positional relationship with the detector 100, the position of the moving magnet 300 may include a moving magnet relative height of the moving magnet 300 with respect to the reference point, and obtaining the liquid reservoir based on the positions of the fixed magnet 200 and the moving magnet 300 may include: and obtaining the liquid level of the liquid storage according to the relative height of the movable magnet and the relative height of the fixed magnet.
The reference point may be a point which has a fixed positional relationship with the detector 100 and is located within the detection range of the detector 100, or may be a point which is located outside the detection range of the detector 100.
As shown in fig. 1, the reference point may be a point a located outside the detection range of the detector 100, and the relative height of the fixed magnet 200 with respect to the fixed magnet at the point a is a. The relative height a0 between the fixed magnet 200 and any point in the detection range of the detector 100 (for convenience of explanation, this point is taken as the bottommost point B of the detector 100), while the relative height between the reference point and the point B is fixed g (the relative height between the reference point and the point B can be preset), and the fixed magnet relative height a is obtained by adding a0 and g.
The moving magnet relative height B of the moving magnet 300 with respect to the point a is obtained by adding B0 and g, the relative height B0 between the moving magnet 300 and the point B is obtained, and the relative height g between the reference point and the point B is obtained by adding B.
In some embodiments of the present application, the reference point may be selected to be a point at the same height as the fixed magnet 200, and the relative height a of the fixed magnet is 0 for calculation.
Since the fixed magnet 200 is fixed in the reservoir 700 in the embodiment of the present application shown in fig. 1, the reservoir levels are a-b. In other embodiments of the present application, the stationary magnet 200 is fixed outside the reservoir 700, and the reservoir level is a-b-h, where h is the thickness of the bottom wall of the reservoir 700.
It will be understood by those skilled in the art that the reference point may be selected from other points besides point a in fig. 1, for example, the bottom-most point of the detector 100, the top-most point of the detector 100, the middle point of the detector 100, or any point on the fuselage 800 of the drone 30 when the detector 100 is fixed to the drone 30, for example, the bottom-most point of the fuselage 800, the top-most point of the fuselage 800, the middle point of the fuselage 800, and so on. Also, the height of the reference point may be above the liquid level, below the liquid level, or equal to the liquid level, etc.
Since the position of the fixed magnet 200 represents the position of the bottom of the liquid and the position of the movable magnet 300 represents the position of the liquid surface of the liquid, accurate measurement results can be obtained from the positions of the fixed magnet 200 and the movable magnet 300 regardless of the relative positions of the detector 100 and the liquid storage device 700.
For the embodiments of the present application, it should also be noted that, in a case of no conflict, the embodiments of the present application and features of the embodiments may be combined with each other to obtain a new embodiment.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and the scope of the present application shall be subject to the scope of the claims.
Claims (35)
1. A gauge (10), characterized in that it comprises:
a fixed magnet (200) fixed to the bottom of the liquid storage device (700);
a moving magnet (300) disposed within the reservoir (700) and configured to move with changes in the reservoir level;
a detector (100) configured to detect the position of the stationary magnet (200) and the moving magnet (300) to obtain the reservoir level.
2. The level gauge (10) of claim 1,
the detector (100) comprises a plurality of hall sensors (110);
the hall sensor (110) corresponding to the fixed magnet (200) among the plurality of hall sensors (110) is used to detect the position of the fixed magnet (200), and the hall sensor (110) corresponding to the moving magnet (300) among the plurality of hall sensors (110) is used to detect the position of the moving magnet (300).
3. The fluid level gauge (10) of claim 2, further comprising:
and a fixing member (400) which connects the plurality of Hall sensors (110) and fixes the plurality of Hall sensors (110).
4. The level gauge (10) of claim 3,
the fixing member (400) is a fixing tube, and the plurality of Hall sensors (110) are distributed along an axial direction of the fixing tube.
5. The level gauge (10) according to claim 3 or 4,
the plurality of Hall sensors (110) are distributed on the outer surface of the fixed member (400).
6. The gauge (10) according to any one of claims 2 to 5,
the plurality of Hall sensors (110) are evenly distributed at equal intervals.
7. The level gauge (10) of claim 1,
the detector (100) comprises a reed switch.
8. The gauge (10) according to any one of claims 1 to 7, further comprising:
the movable magnet positioning piece (500) is arranged in the liquid storage device (700) and used for limiting the movable magnet (300) to move along the liquid level of the liquid stored in the liquid storage device (700).
9. The level gauge (10) of claim 8,
the movable magnet positioning piece (500) comprises a movable magnet positioning rod;
the movable magnet (300) is provided with a through hole used for penetrating through the movable magnet positioning rod, so that the movable magnet (300) moves along the axial direction of the movable magnet positioning rod when the liquid storage level changes.
10. The gauge (10) according to any one of claims 1 to 9, further comprising:
and the fixed magnet positioning piece (600) is arranged at the bottom of the liquid storage device (700) and is used for fixing the fixed magnet (200).
11. A spray assembly (20), comprising:
a reservoir (700), the reservoir (700) defining a reservoir cavity therein for containing a liquid;
the fixed magnet (200) is fixed at the bottom of the liquid storage cavity;
a moving magnet (300) disposed within the reservoir and configured to move with a change in a level of the liquid;
a detector (100) configured to detect the position of the stationary magnet (200) and the moving magnet (300) to obtain the level of the liquid.
12. The spray assembly (20) of claim 11,
the detector (100) comprises a plurality of hall sensors (110);
the hall sensor (110) corresponding to the fixed magnet (200) among the plurality of hall sensors (110) is used to detect the position of the fixed magnet (200), and the hall sensor (110) corresponding to the moving magnet (300) among the plurality of hall sensors (110) is used to detect the position of the moving magnet (300).
13. The spray assembly (20) of claim 12, further comprising:
and a fixing member (400) which connects the plurality of Hall sensors (110) and fixes the plurality of Hall sensors (110).
14. The spray assembly (20) of claim 13,
the fixing piece (400) is a same fixed pipe, and the Hall sensors (110) are distributed along the axial direction of the fixed pipe.
15. The spray assembly (20) of claim 13 or 14,
the plurality of Hall sensors (110) are distributed on the outer surface of the fixed member (400).
16. The spray assembly (20) of any of claims 12 to 15,
the plurality of Hall sensors (110) are evenly distributed at equal intervals.
17. The spray assembly (20) of claim 11,
the detector (100) comprises a reed switch.
18. The spray assembly (20) of any of claims 11 to 17, further comprising:
and the movable magnet positioning piece (500) is arranged in the liquid storage cavity and used for limiting the movable magnet (300) to move along the liquid level of the liquid.
19. The spray assembly (20) of claim 18,
the movable magnet positioning piece (500) comprises a movable magnet positioning rod;
the movable magnet (300) is provided with a through hole for penetrating through the movable magnet positioning rod, so that the movable magnet (300) moves along the axial direction of the movable magnet positioning rod when the liquid level of the liquid changes.
20. The spray assembly (20) of any of claims 11 to 19,
the spraying assembly (20) further comprises a fixed magnet positioning piece (600), and the fixed magnet positioning piece (600) is arranged at the bottom of the liquid storage cavity and used for fixing the fixed magnet (200); or
The bottom of the liquid storage cavity is provided with a same fixing structure for fixing the same fixing magnet (200).
21. An unmanned aerial vehicle (30), comprising:
a liquid storage device (700), a liquid storage cavity for containing liquid is defined in the liquid storage device (700), and the liquid storage device (700) is detachably mounted on the unmanned aerial vehicle (30) body (800);
the detector (100) is fixed in an area, corresponding to the liquid storage device (700), of a body (800) of the unmanned aerial vehicle (30);
the fixed magnet (200) is fixed at the bottom of the liquid storage cavity;
a moving magnet (300) disposed within the reservoir and configured to move with a change in a level of the liquid;
the detector (100) is configured to detect the position of the stationary magnet (200) and the moving magnet (300) to obtain the level of the liquid.
22. The drone (30) of claim 21,
the detector (100) comprises a plurality of hall sensors (110);
the hall sensor (110) corresponding to the fixed magnet (200) among the plurality of hall sensors (110) is used to detect the position of the fixed magnet (200), and the hall sensor (110) corresponding to the moving magnet (300) among the plurality of hall sensors (110) is used to detect the position of the moving magnet (300).
23. The drone (30) of claim 22, further comprising:
the fixing piece (400) is connected with the Hall sensors (110), and the Hall sensors (110) are fixed on the unmanned aerial vehicle body (800) of the unmanned aerial vehicle (30).
24. The drone (30) of claim 23,
the fixing member (400) is a fixing tube, and the plurality of Hall sensors (110) are distributed along an axial direction of the fixing tube.
25. The drone (30) of claim 23 or 24,
the plurality of Hall sensors (110) are distributed on the outer surface of the fixed member (400).
26. The unmanned aerial vehicle (30) of any of claims 22-25,
the plurality of Hall sensors (110) are evenly distributed at equal intervals.
27. The drone (30) of claim 21,
the detector (100) comprises a reed switch.
28. The drone (30) of any one of claims 21 to 27, further comprising:
and the movable magnet positioning piece (500) is arranged in the liquid storage cavity and used for limiting the movable magnet (300) to move along the liquid level of the liquid.
29. The drone (30) of claim 28,
the movable magnet positioning piece (500) comprises a movable magnet positioning rod;
the movable magnet (300) is provided with a through hole for penetrating through the movable magnet positioning rod, so that the movable magnet (300) moves along the axial direction of the movable magnet positioning rod when the liquid level of the liquid changes.
30. The unmanned aerial vehicle (30) of any of claims 21-29,
the unmanned aerial vehicle (30) further comprises a fixed magnet positioning piece (600), and the fixed magnet positioning piece (600) is arranged at the bottom of the liquid storage cavity and used for fixing the fixed magnet (200); or
And a fixing structure for fixing the fixed magnet (200) is formed at the bottom of the liquid storage cavity.
31. The unmanned aerial vehicle (30) of any of claims 21-30,
the unmanned aerial vehicle (30) is a plant protection machine.
32. A measuring method of a gauge (10), characterized in that the gauge (10) comprises: a fixed magnet (200) fixed to the bottom of the liquid storage device (700); a moving magnet (300) disposed in the liquid storage device (700); a detector (100) configured to detect positions of the fixed magnet (200) and the moving magnet (300); and the measuring method comprises the following steps:
acquiring positions of the fixed magnet (200) and the moving magnet (300) detected by the detector (100);
and obtaining the liquid storage level of the liquid storage device (700) according to the positions of the fixed magnet (200) and the movable magnet (300).
33. The measurement method according to claim 32, characterized in that the detector (100) comprises a plurality of hall sensors (110); the acquiring the positions of the fixed magnet (200) and the moving magnet (300) detected by the detector (100) includes:
the position of the fixed magnet (200) detected by the hall sensor (110) corresponding to the fixed magnet (200) among the plurality of hall sensors (110) is acquired, and the position of the moving magnet (300) detected by the hall sensor (110) corresponding to the moving magnet (300) among the plurality of hall sensors (110) is acquired.
34. A measuring method according to claim 32, characterized in that the detector (100) comprises a reed switch; the acquiring the positions of the fixed magnet (200) and the moving magnet (300) detected by the detector (100) includes:
and acquiring the positions of the fixed magnet (200) and the movable magnet (300) detected by the reed switch.
35. The measurement method according to any one of claims 32 to 34, wherein the position of the fixed magnet (200) comprises a fixed magnet relative height of the fixed magnet (200) with respect to a reference point fixed in positional relationship with the detector (100), the position of the moving magnet (300) comprises a moving magnet relative height of the moving magnet (300) with respect to the reference point, and the obtaining the liquid storage according to the positions of the fixed magnet (200) and the moving magnet (300) comprises:
and obtaining the liquid storage level according to the relative height of the movable magnet and the relative height of the fixed magnet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/092971 WO2021237582A1 (en) | 2020-05-28 | 2020-05-28 | Liquid level meter and measuring method therefor, and spraying assembly and unmanned aerial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113167631A true CN113167631A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080005286.6A Pending CN113167631A (en) | 2020-05-28 | 2020-05-28 | Liquid level meter, measuring method thereof, spraying assembly and unmanned aerial vehicle |
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| Country | Link |
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| CN (1) | CN113167631A (en) |
| WO (1) | WO2021237582A1 (en) |
Cited By (1)
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| CN116806799A (en) * | 2023-08-25 | 2023-09-29 | 深圳市纬尔科技有限公司 | Intelligent agricultural field weeding method and system |
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| WO2021237582A1 (en) | 2021-12-02 |
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Application publication date: 20210723 |