WO2021212876A1 - 液位组件及装置 - Google Patents

液位组件及装置 Download PDF

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Publication number
WO2021212876A1
WO2021212876A1 PCT/CN2020/135919 CN2020135919W WO2021212876A1 WO 2021212876 A1 WO2021212876 A1 WO 2021212876A1 CN 2020135919 W CN2020135919 W CN 2020135919W WO 2021212876 A1 WO2021212876 A1 WO 2021212876A1
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WO
WIPO (PCT)
Prior art keywords
liquid level
level gauge
bracket
liquid
tank
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PCT/CN2020/135919
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English (en)
French (fr)
Inventor
胡德琪
张文康
舒展
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深圳市大疆创新科技有限公司
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Publication of WO2021212876A1 publication Critical patent/WO2021212876A1/zh

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • 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
    • G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves

Definitions

  • the invention relates to the field of liquid level gauges, in particular to a liquid level assembly and device.
  • level gauges With the development of precision agriculture, plant protection drones, pesticide spraying vehicles, etc. are increasingly required for level gauges to more accurately monitor the remaining amount of medicine in the medicine box, so as to plan the dosing point and medicine electricity according to the remaining amount of medicine. And other functions. At present, for plant protection drones, pesticide spraying vehicles, etc., most of the reflective level gauges such as radar and ultrasonic are used.
  • the detection method of the reflection type liquid level gauge is to measure the liquid level distance by measuring the time difference between the transmitted detection wave and the received reflection detection wave.
  • the reflection type liquid level gauge emits the detection wave, there is a certain time gap between the transmission wave. If the detection distance is relatively close, the transmission wave and the reflection wave overlap at the receiving end, which will result in a relatively close range of the distance. Can not be measured inside, this area is the blind zone distance of the level gauge. The blind spot distance will cause the measurement range of the level gauge to be reduced, and the measurement accuracy will be reduced, which is not conducive to the development of precision agriculture.
  • the invention provides a liquid level assembly and a device using the assembly which can reduce the measurement blind zone and improve the measurement accuracy.
  • a liquid level component including:
  • Box body used to hold liquid
  • a liquid level gauge for measuring the height of the liquid level in the tank
  • the bracket is used to install the liquid level gauge, and the position of the liquid level gauge is higher than the highest liquid level of the tank.
  • the distance between the liquid level gauge and the highest liquid level of the tank is greater than the blind zone distance of the liquid level gauge.
  • the bracket can be foldably arranged on the box body.
  • the bracket is a handle
  • the handle is provided with a containing cavity
  • the level gauge is installed in the containing cavity
  • the detection wave of the level gauge is perpendicularly incident on the liquid surface .
  • the containing cavity is communicated with the box, and the detection wave of the level gauge can be directly incident on the liquid surface.
  • the bracket and the box body are an integral structure.
  • the bracket can be telescopically arranged on the box body.
  • the liquid level gauge is detachably installed on the bracket.
  • the liquid level gauge is a reflection type liquid level gauge.
  • the outer surface of the level gauge is covered with a protective film layer.
  • a device includes a liquid level component and a central body, and the liquid level component and the central body are detachably connected.
  • the bracket can be telescopically arranged on the central body.
  • a flight control system is further included, and the liquid level component is in communication connection with the flight control system.
  • it further includes a positioning device and a power supply, and both the positioning device and the power supply are communicatively connected with the flight control system.
  • the distance of the blind zone of the level gauge in the tank body is reduced compared to the blind zone distance of the traditional liquid level gauge.
  • the measurement blind zone of the level gauge is reduced. Therefore, the distance of the blind zone of the liquid level gauge of the liquid level assembly only affects the smaller volume of liquid medicine.
  • the liquid level component can more accurately measure the remaining amount of medicine in the tank, which is beneficial for the device to control the transportation and plan the route according to the current remaining liquid, and improve the working efficiency of the device.
  • Figure 1 is a three-dimensional schematic diagram of the device of this embodiment
  • Fig. 2 is a schematic diagram of an electrical module of the device shown in Fig. 1;
  • FIG. 3 is a schematic diagram of the structure of the liquid level assembly of the embodiment
  • Fig. 4 is a perspective view of the liquid level assembly shown in Fig. 1.
  • the direction indications (such as up, down, left, right, front and back) are used to explain the structure and movement of various elements of the present invention not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the directions of these directions also change accordingly.
  • the device can be a transportation device such as an unmanned aerial vehicle, an unmanned transportation vehicle, etc., and can also be other devices used to hold liquids.
  • the device 10 includes a central body 11 and a liquid level component 12. Then the central body 11 can be the main body of the unmanned aerial vehicle frame or the body of the unmanned transport vehicle. Specifically, in this embodiment, the device 10 is described by taking an unmanned aerial vehicle as an example, and other details will not be repeated.
  • the liquid level component 12 can be used for liquid level measurement in unmanned transportation equipment.
  • the device 10 includes a central body 11 and a liquid level component 12.
  • the device 10 is used to transport the liquid in the liquid level assembly 12 to a designated location.
  • the liquid contained in the liquid level assembly 12 may be water, medicine, and the like.
  • the liquid level assembly 12 is detachably connected to the central body 11. After the liquid in the liquid level assembly 12 is used up, the empty liquid level assembly 12 can be quickly removed from the central body 11, and then another liquid level assembly 12 filled with liquid can be installed on the central body 11. The device 10 can continue to work, and the entire process saves time and is easy to operate.
  • the drone of this embodiment may be an agricultural drone.
  • the liquid contained in the liquid level component 12 is a pesticide, which is used for spraying crops.
  • a pesticide which is used for spraying crops.
  • the UAV includes a flight control system 13.
  • the liquid level component 12 is in communication connection with the flight control system 13.
  • the liquid level component 12 sends the current residual amount of pesticide it has obtained to the flight control system 13, and the flight control system 13 performs flight control according to the current residual amount of pesticide.
  • the drone also includes a positioning device 14.
  • the positioning device 14 is used to provide precise positioning for the drone 10.
  • the positioning device 14 is in communication connection with the flight control system 13. Wherein, the positioning device 14 sends the current position information of the drone acquired by it to the flight control system 13. Therefore, the flight control system 13 performs flight control according to the remaining amount of pesticide and the current position information, so as to realize the planning and design of the dosing point for the flight of the UAV.
  • the positioning device 14 may be an RTK positioning device.
  • the drone also includes a power source 15.
  • the power supply 15 is in communication connection with the flight control system 13.
  • the flight control system 13 can obtain the current remaining power of the power supply 15, and the flight control system 13 performs drug power planning and design based on the current position information, the current remaining amount of pesticides, and the remaining power.
  • the planning and design of the medicine and electricity can include the design of the flight strategy of the UAV according to the remaining medicine and the remaining power, and the design of the flight speed and flight route.
  • the drone also includes a tripod 16.
  • the tripod 16 is used to support the center body 11, the liquid level assembly 12, the flight control system 13, the positioning device 14 and the power supply 15.
  • the liquid level assembly 12 of this embodiment includes a box 121, a liquid level gauge 122 and a bracket 123.
  • the tank 121 is used for containing liquid.
  • the central body 11 is provided with an installation groove (not marked in the figure) for installing the box 121.
  • the specific shape of the box body 121 is not limited here, and the corresponding box body 121 and the shape of the installation groove are designed according to the needs of use.
  • the shape of the box 121 may be a rectangular shell.
  • the box body 121 is detachably arranged in the installation slot.
  • the box body 121 may be snap-connected to the central body 11 to realize the detachable connection between the liquid level assembly 12 and the central body 11.
  • the level gauge 122 is used to measure the height of the liquid level in the tank 121.
  • the level gauge 122 may be a reflection type level gauge.
  • the reflection type liquid level gauge may be an ultrasonic liquid level gauge, a radar liquid level gauge, and the like.
  • the reflection type liquid level gauge can emit a detection wave, the detection wave is incident perpendicular to the liquid surface of the tank 121, and is reflected by the liquid surface to form a reflection wave, and collect the reflection wave. After comparing the time difference between the received reflected wave and the transmitted detection wave, the height of the liquid level in the tank 121 can be calculated.
  • the outer surface of the level gauge 122 is covered with a protective film layer (not shown in the figure).
  • the protective film layer can isolate the level gauge 122 from the liquid, and prevent the liquid from corroding the level gauge 122 and affecting the service life of the level gauge 122. It should be noted that the material and thickness of the protective film layer will not affect the level gauge 122 to transmit detection waves and receive reflected waves.
  • the protective film layer can be a plastic layer, a resin layer or a hydrophobic film layer.
  • the bracket 123 is used to install the level gauge 122.
  • the bracket 123 can support and carry the level gauge 122.
  • the bracket 123 is used to install the level gauge 122 at a position higher than the highest liquid level of the tank 121. Therefore, the bracket 123 can raise the position of the level gauge 122 to ensure that the position of the level gauge 122 is higher than the highest liquid level of the tank 121. ⁇ Surface height.
  • the liquid level gauge In traditional liquid level components, the liquid level gauge is usually installed on the top of the inside of the tank. Because the level gauge has a certain blind spot distance, when the distance between the height of the liquid level in the tank and the top surface of the tank is within the blind zone distance of the level gauge, the level gauge cannot measure the current time accurately and in time. Liquid level.
  • the blind zone distance of the level gauge is the measurement blind zone of the level gauge, and the measurement blind zone of the level gauge is relatively large. Among them, the blind zone distance of the level gauge is the inherent blind zone range of the level gauge itself.
  • the measurement blind zone of the liquid level gauge is the measurement range of the actual influence of the liquid level gauge on the liquid level measurement in the tank.
  • the measurement blind zone of the level gauge 122 in the tank 121 is relative to the blind zone distance of the traditional level gauge.
  • the reduction is obtained, that is, the measurement blind zone of the liquid level gauge 122 is smaller than the blind zone distance of the liquid level 122.
  • the measurement blind zone of the level gauge 122 also only affects a small volume of liquid medicine. Therefore, the liquid level component 12 can more accurately measure the remaining amount of medicine in the tank 121, which is beneficial for the agricultural drone to control and plan the flight according to the remaining amount of medicine.
  • the measurement blind area of the liquid level component is reduced, which can better detect the liquid level of the liquid in the device.
  • the distance between the liquid level gauge 122 and the highest liquid level of the tank 121 is greater than the blind zone distance of the liquid level gauge 122.
  • the blind zone distances are all located outside the highest liquid level in the tank 121, and the liquid level gauge 122 has no measurement blind zone relative to the liquid level in the tank 121. Therefore, the level gauge 122 can measure any height of the liquid level in the tank 121 to ensure that the agricultural drone can accurately measure the amount of medicine remaining in the tank 121, so that the flight strategy can be accurately planned.
  • the bracket 123 of the box 121 may be provided on the top of the box 121. It can be understood that the bracket 123 may also be fixed on one side of the tank 121, as long as it can be ensured that the installation part where the liquid level gauge 122 is installed can be higher than the highest liquid level in the tank 121.
  • the bracket 123 can also be foldably arranged on the box 121.
  • the bracket 123 may include two states, namely, a storage state and a working state.
  • a storage state When the liquid level assembly 12 is stored, housed, and transported, the bracket 123 is folded on the box 121 and the bracket 123 is in the storage state, which can reduce the occupied space of the liquid level assembly 12.
  • the bracket 123 When the liquid level assembly 12 is installed on the central body 11 of the device 10, the bracket 123 is opened to raise the height of the liquid level gauge 122, and the bracket 123 is in a working state.
  • bracket 123 may be hinged to the box body 121 through a hinged connection; or the bracket 123 itself is a foldable structure, and the bracket 123 can be foldably arranged relative to the box body 121.
  • the bracket 123 can also be telescopically arranged on the box 121.
  • the bracket 123 When the liquid level assembly 12 is in the process of storage, storage, and transportation, the bracket 123 is stretched on the box 121 and the bracket 123 is in the storage state, which can reduce the occupied space of the liquid level assembly 12.
  • the bracket 123 When the liquid level assembly 12 is installed on the central body 11 of the device 10, the bracket 123 is extended to raise the height of the liquid level gauge 122, and the bracket 123 is in a working state.
  • the bracket 123 may be a telescopic rod, a telescopic cylinder, or the like.
  • the bracket 123 may be a handle 124.
  • the bracket 123 and the box 121 may be an integral structure.
  • the handle 124 is provided with a receiving cavity 125.
  • the level gauge 122 is installed in the receiving cavity 125.
  • the receiving cavity 125 communicates with the box 121.
  • the detection wave of the liquid level gauge 122 is perpendicularly incident on the liquid surface.
  • the installation position of the level gauge 122 is directly opposite to the opening 126 of the tank 121, and the detection wave of the level gauge 122 can pass through the opening 126 of the tank 121 and be directly incident on the liquid surface. In other embodiments, the detection wave of the liquid level gauge 122 can also be incident on the liquid surface after being reflected multiple times in the containing cavity 125.
  • the receiving cavity 125 of the handle 124 can also be omitted, and the level gauge 122 is directly mounted on the bracket 123.
  • the detection wave of the level gauge 122 has a certain degree of penetrability.
  • the level gauge 122 can also be installed on the outside of the tank 121. That is, the detection wave of the liquid level gauge 122 is located on the outside of the tank 121, can penetrate the side wall of the tank 121, enter the tank 121, and then be incident on the liquid surface in the tank 121.
  • the reflected wave can also penetrate the side wall of the tank 121, and the liquid level gauge 122 can also accurately measure the liquid level in the tank 121.
  • the bracket 123 may also be telescopically arranged on the central body 11.
  • the bracket 123 When the liquid level assembly 12 is in the process of storage, storage, and transportation, the bracket 123 can be retracted and arranged on the center body 11, and the bracket 123 is in the storage state, which can reduce the occupied space of the liquid level assembly 12.
  • the bracket 123 pops up or stretches to raise the height of the liquid level gauge 122, and the bracket 123 is in a working state.
  • the bracket 123 may be a telescopic rod, a telescopic cylinder, or the like.
  • the retractable bracket 123 can also be interlocked with the plug-in installation of the box body 121.
  • the bracket 123 will extend out in conjunction.
  • the pressure switch can be driven electrically, or mechanically driven to extend the retractable bracket 123 Out or pop out.
  • the above-mentioned mechanical transmission may utilize elastic members such as springs and torsion springs to realize the linkage expansion and contraction of the bracket 123. Therefore, the volume of the above-mentioned device 10 is small, which prevents the bracket 123 from occupying a large space, and the automation level of the above-mentioned device 10 is improved, and the user experience is improved.
  • the level gauge 122 can be detachably installed on the bracket 123.
  • the liquid level gauge 122 can be disassembled while disassembling the liquid level component of the tank 121 , And installed on the bracket 123 of the next liquid level assembly 12. Therefore, multiple liquid level assemblies 12 can share one liquid level gauge 122, which reduces the cost of the liquid level assembly 12 and saves resources.
  • the above-mentioned device 10 has at least the following advantages over conventional devices:
  • the liquid level component 12 of the above-mentioned device 10 can reduce the measurement blind zone of the liquid level gauge 122, even if the liquid level gauge does not have a measurement blind zone. Therefore, the above-mentioned liquid level assembly 12 can ensure that the remaining liquid volume in the tank 121 can be measured in a timely and accurate manner, and provide an accurate data basis for the design of the dosing point of the device 10 and the drug-electricity planning.
  • the above-mentioned device 10 can be operated accurately according to the plan, and the working efficiency of the device 10 can be improved.
  • the occupancy volume of the bracket 123 of the above-mentioned liquid level assembly 12 is small, which will not affect the occupied volume of the liquid level assembly 12 during transportation, which is convenient for transportation and storage.
  • the above-mentioned liquid level assembly 12 can be reused, and a plurality of tanks 121 can share one liquid level gauge 122, which saves the cost of the above-mentioned liquid level assembly 12.

Abstract

一种液位组件（12）及装置（10），液位组件（12）包括箱体（121）、液位计（122）及支架（123）；箱体（121）用于盛放液体，液位计（122）用于测量箱体（121）内的液体液面高度；支架（123）用于安装液位计（122），液位计（122）的位置高于箱体（121）的最高液面高度；液位组件（12）及使用液位组件（12）的装置（10）可以减小液位计（122）的测量盲区，提高液位组件（12）的测量精度。

Description

液位组件及装置 技术领域
本发明涉及液位计领域，特别涉及一种液位组件及装置。
背景技术
随着精准农业的发展，对于植保无人机、农药喷洒车等越来越要求液位计能够更精准地监测药箱内剩余药量，以根据剩余药量进行加药点规划、药电规划等功能。目前，对于植保无人机、农药喷洒车等大多采用雷达式、超声波式等反射式液位计。
但是，由于反射式液位计的检测方式是通过测量发射检测波与接收到反射的检测波的时间差，来测量液位距离。反射式液位计在发射检测波时，发射波存在一定的时间间隙，如果检测距离较近的时候，则发射波与反射波在接收端有重叠，则会导致在该距离较近的一段范围内不能测量，这个区域就是液位计的盲区距离。该盲区距离会导致液位计的测量范围缩小，测量精度降低等问题，不利于精准农业的发展。
发明内容
本发明提供一种可以减小测量盲区，提高测量精度的液位组件及使用该组件的装置。
一种液位组件，包括：
箱体，用于盛放液体；
液位计，用于测量所述箱体内的液体液面高度；及
支架，用于安装所述液位计，所述液位计的位置高于所述箱体的最高液面高度。
在其中一实施方式中，所述液位计距离所述箱体的最高液面高度的距离大于所述液位计的盲区距离。
在其中一实施方式中，所述支架可折叠设于所述箱体上。
在其中一实施方式中，所述支架为把手，所述把手开设有收容腔，所述液位计安装于所述收容腔内，所述液位计的检测波垂直入射于所述液面上。
在其中一实施方式中，所述收容腔与所述箱体相连通，所述液位计的检测波可直接入射至所述液面上。
在其中一实施方式中，所述支架与所述箱体为一体结构。
在其中一实施方式中，所述支架可伸缩设于所述箱体上。
在其中一实施方式中，所述液位计可拆卸设于所述支架上。
在其中一实施方式中，所述液位计为反射式液位计。
在其中一实施方式中，所述液位计的外表面包覆有保护膜层。
一种装置，包括液位组件及中心体，所述液位组件与所述中心体可拆卸连接。
在其中一实施方式中，所述支架可伸缩设于所述中心体上。
在其中一实施方式中，还包括飞行控制系统，所述液位组件与所述飞行控制系统通讯 连接。
在其中一实施方式中，还包括定位装置及电源，所述定位装置及电源均与所述飞行控制系统通讯连接。
上述液位组件及装置中，液位计的位置高于箱体的最高液面高度的时候，则液位计位于箱体内的盲区距离相对于传统的液位计的盲区距离得到了缩小，即，液位计的测量盲区得到减小。因此，上述液位组件的液位计的盲区距离也只影响较小体积的药液。该液位组件能够较为精准的测量到箱体内的剩余药量，有利于装置根据该当前剩余液体控制运输和规划路线，提高装置的工作效率。
附图说明
图1为本实施方式的装置的立体示意图；
图2为图1所示的装置的电学模块示意图；
图3为本实施方式的液位组件的结构示意图；
图4为图1所示的液位组件的立体图。
附图标记说明如下：10、装置；11、中心体；12、液位组件；13、飞行控制系统；14、定位装置；15、电源；16、脚架；121、箱体；122、液位计；123、支架；124、把手；125、收容腔；126、开口。
具体实施方式
尽管本发明可以容易地表现为不同形式的实施方式，但在附图中示出并且在本说明书中将详细说明的仅仅是其中一些具体实施方式，同时可以理解的是本说明书应视为是本发明原理的示范性说明，而并非旨在将本发明限制到在此所说明的那样。
由此，本说明书中所指出的一个特征将用于说明本发明的一个实施方式的其中一个特征，而不是暗示本发明的每个实施方式必须具有所说明的特征。此外，应当注意的是本说明书描述了许多特征。尽管某些特征可以组合在一起以示出可能的系统设计，但是这些特征也可用于其他的未明确说明的组合。由此，除非另有说明，所说明的组合并非旨在限制。
在附图所示的实施方式中，方向的指示(诸如上、下、左、右、前和后)用于解释本发明的各种元件的结构和运动不是绝对的而是相对的。当这些元件处于附图所示的位置时，这些说明是合适的。如果这些元件的位置的说明发生改变时，则这些方向的指示也相应地改变。
以下结合本说明书的附图，对本发明的较佳实施方式予以进一步地详尽阐述。
请参阅图1，本实施方式提供一种装置。该装置可以为无人机、无人运输车等运输装置，还可以为其他用于盛放液体的装置。
具体在本实施方式中，该装置10包括中心体11及液位组件12。则该中心体11可以为无人机的机架主体，也可以为无人运输车的车身主体。具体在本实施方式中，该装置 10以无人机为例进行说明，其他不再赘述。
液位组件12可以用于无人运输设备中的液位计量。装置10包括中心体11及液位组件12。装置10用于将液位组件12内的液体运输至指定位置。液位组件12内盛放的液体可以为水、药品等。
液位组件12与中心体11可拆卸连接。液位组件12内的液体使用完毕之后，即可将该空的液位组件12从中心体11上快速拆卸下来，再将装满液体的另一液位组件12安装在中心体11上，则该装置10即可继续工作，整个过程节约时间，操作方便。
并且，本实施方式的无人机可以为农用无人机。液位组件12内盛放的液体为农药，用于对农作物进行喷洒。对于农用无人机根据液位组件12内的农药剩余量对农用无人机的飞行路线及飞行策略进行合理规划设计，例如，加药点规划设计、药电规划设计等。
请参阅图2，无人机包括飞行控制系统13。液位组件12与飞行控制系统13通讯连接。液位组件12将其获取的当前的农药剩余量发送给飞行控制系统13，飞行控制系统13根据当前的农药剩余量进行飞行控制。
并且，该无人机还包括定位装置14。定位装置14用于为无人机10提供精准定位。定位装置14与飞行控制系统13通讯连接。其中，定位装置14将其获取的无人机的当前位置信息，发送给飞行控制系统13。因此，飞行控制系统13根据农药剩余量及当前位置信息进行飞行控制，从而实现对无人机的飞行进行加药点进行规划设计。可以理解，该定位装置14可以为RTK定位装置。
并且，该无人机还包括电源15。该电源15与飞行控制系统13通讯连接。飞行控制系统13可以获取电源15当前的剩余电量，飞行控制系统13根据当前位置信息、当前的农药剩余量及剩余电量进行药电规划设计。其中，药电规划设计可以包括根据剩余药量、剩余电量进行无人机的飞行策略设计，设计飞行速度，飞行路线等。
该无人机还包括脚架16。脚架16用于支撑中心体11、液位组件12、飞行控制系统13、定位装置14及电源15。
请参阅图3及图4，本实施方式的液位组件12包括箱体121、液位计122及支架123。
箱体121用于盛放液体。中心体11开设有用于安装箱体121的安装槽(图未标)。此处对箱体121的具体形状并不做限定，根据使用需要设计相应的箱体121及安装槽形状。具体地，箱体121的形状可以为矩形壳体。
箱体121可拆卸设于安装槽内。例如，箱体121可以与中心体11卡合连接，以实现液位组件12与中心体11的可拆卸连接。
液位计122用于测量箱体121内的液体液面高度。液位计122可以为反射式液位计。该反射式液位计可以为超声波液位计、雷达液位计等。反射式液位计可以发射检测波，检测波垂直入射至箱体121的液面，经液面反射形成反射波，采集反射波。经过对比接收到的反射波与发射检测波之间的时间差，从而可以计算该箱体121内的液面高度。
并且，液位计122的外表面包覆有保护膜层(图未示)。该保护膜层可以使液位计122 与液体进行隔离，避免液体侵蚀液位计122，影响液位计122的使用寿命。需要说明的是，该保护膜层的材质及厚度不会影响该液位计122发射检测波和接收反射波。该保护膜层可以为塑料层、树脂层或疏水膜层。
支架123用于安装该液位计122。支架123可以支撑、承载该液位计122。支架123用安装液位计122的位置高于箱体121的最高液面高度，因此，支架123可以抬高液位计122的位置，保证液位计122的位置高于箱体121的最高液面高度。
在传统液位组件中，液位计通常安装于箱体内部的顶部。由于液位计具有一定的盲区距离，则当箱体内的液面高度与箱体顶面之间的距离位于液位计的盲区距离的时候，则液位计并不能及时、准确的测量当前的液面高度。该液位计的盲区距离即为该液位计的测量盲区，液位计的测量盲区较大。其中，液位计的盲区距离为液位计自身固有的盲区范围。液位计的测量盲区为液位计对于箱体内的液位测量的实际影响的测量范围。随着农用无人机在精准农业的应用越来越广泛，农用无人机搭载的箱体的体积也趋于不断地扩大。由于箱体的体积较大，则该箱体的横截面的面积也就越来越大，在液位计的盲区距离范围内的药液体积也越来越大，因此，液位计的盲区距离对农用无人机对药液的精准测量影响也越来越大。
具体在本实施方式中，当液位计122的位置高于箱体121的最高液面高度的时候，则液位计122位于箱体121内的测量盲区相对于传统的液位计的盲区距离得到了缩小，即，该液位计122的测量盲区小于该液位122的盲区距离。液位计122的测量盲区也只影响较小体积的药液。因此，该液位组件12能够较为精准的测量到箱体121内的剩余药量，有利于农用无人机根据该剩余药量控制和规划飞行。
对于其他用于盛放液体的装置而言，该液位组件的测量盲区得到了缩小，能够更好的检测装置内液体的液面高度。
进一步地，液位计122距离箱体121的最高液面高度的距离大于液位计122的盲区距离。则对于该液位计122，其盲区距离均位于箱体121内最高液面高度的外侧，则液位计122相对于箱体121内的液位高度不存在测量盲区。因此，该液位计122可以测量箱体121内任一液位高度，保证农用无人机能够精准地测算到箱体121内剩余药量，从而能够准确规划飞行策略。
具体在本实施方式中，箱体121支架123可以设于箱体121的顶部。可以理解，支架123还可以固定设于箱体121的一侧，只要能够保证安装液位计122的安装部能够高于箱体121内的最高液面高度即可。
并且，支架123还可以可折叠设于箱体121上。则支架123可以包括两个状态，即，收纳状态及工作状态。当液位组件12在存储、收纳、运输的过程中，支架123收折于箱体121上，支架123处于收纳状态，可以减小液位组件12的占用空间。当液位组件12安装于装置10的中心体11上的时候，则支架123打开，抬高液位计122的高度，支架123处于工作状态。
可以理解，支架123可以通过铰接连接件，铰接于箱体121上；或者，支架123本身即为可折叠结构，均可以实现支架123相对于箱体121可折叠设置。
同样，支架123还可以可伸缩设于箱体121上。当液位组件12在存储、收纳、运输的过程中，支架123伸缩于箱体121上，支架123处于收纳状态，可以减小液位组件12的占用空间。当液位组件12安装于装置10的中心体11上的时候，则支架123伸长，抬高液位计122的高度，支架123处于工作状态。可以理解，支架123可以为伸缩杆、伸缩缸等。
请参阅图4，具体在本实施方式中，支架123可以为把手124。支架123可以与箱体121可以为一体结构。该把手124开设有收容腔125。液位计122安装于收容腔125内。收容腔125与箱体121相连通。液位计122的检测波垂直入射于所述液面上。
具体地。液位计122的安装位置与箱体121的开口126正对，则液位计122的检测波可以通过箱体121的开口126，直接入射至液面上。在其他实施方式中，液位计122的检测波还可以在收容腔125内，经过多次反射之后再入射至液面上。
或者，把手124的收容腔125也可以省略，液位计122直接安装于支架123上。液位计122的检测波具有一定的穿透性，当液位计122的检测波可以穿透箱体121的材质，则液位计122也可以安装于箱体121的外侧。即，液位计122的检测波位于箱体121的外侧，可以穿透箱体121的侧壁进入箱体121在，再入射至箱体121内的液面上。并且，反射波也可以穿透箱体121的侧壁，则液位计122同样也可以对该箱体121内的液面进行精准测量。
在其他实施方式中，支架123还可以可伸缩设于中心体11上。当液位组件12在存储、收纳、运输的过程中，支架123可收缩设于中心体11上，支架123处于收纳状态，可以减小液位组件12的占用空间。当液位组件12安装于装置10的中心体11上的时候，则支架123弹出或伸长，抬高液位计122的高度，支架123处于工作状态。支架123可以为伸缩杆、伸缩缸等。
并且，可伸缩的支架123还可以与箱体121的插拔安装之间相互联动，当箱体121插入安装在中心体11上的时候，支架123联动伸出。例如，箱体121与中心体11之间设有压力开关，当箱体121与中心体11之间的压力达到阈值的时候，则压力开关可以电动驱动，或者机械传动使可伸缩的支架123伸出或弹出。例如，上述机械传动可以利用弹簧、扭簧等弹性件实现支架123的联动伸缩。因此，上述装置10的体积较小，避免支架123占用较大的空间，并且提高上述装置10的自动化水平，提高用户使用体验。
具体在本实施方式中，液位计122可以可拆卸设于支架123上。当一液位组件12的箱体121内的药液用完之后，需要更换下一液位组件12的时候，在拆卸该箱体121液位组价的同时，可以将液位计122拆卸下来，并安装于下一液位组件12的支架123上。因此，多个液位组件12可以共用一个液位计122，降低液位组件12的成本，节约资源。
因此，上述装置10相对于传统的装置至少具有以下优点：
首先，上述装置10的液位组件12可以减小液位计122的测量盲区，甚至该液位计不存在测量盲区。因此，上述液位组件12可以保证能够及时、准确的测量得到箱体121内的剩余液量，为装置10的加药点设计及药电规划等提供准确的数据基础。上述装置10可以精准的按照规划运行，提高装置10的工作效率。
其次，上述液位组件12的支架123的占用体积较小，不会影响该液位组件12在运输过程中的占用体积，方便运输和收纳。
并且，上述液位组件12可以重复使用，多个箱体121可以共用一个液位计122，节约上述液位组件12的成本。
虽然已参照几个典型实施方式描述了本发明，但应当理解，所用的术语是说明和示例性、而非限制性的术语。由于本发明能够以多种形式具体实施而不脱离发明的实质，所以应当理解，上述实施方式不限于任何前述的细节，而应在随附权利要求所限定的范围内广泛地解释，因此落入权利要求或其等效范围内的全部变化和改型都应为随附权利要求所涵盖。

Claims (14)

  1. 一种液位组件，其特征在于，包括：
    箱体，用于盛放液体；
    液位计，用于测量所述箱体内的液体液面高度；及
    支架，用于安装所述液位计，所述液位计的位置高于所述箱体的最高液面高度。
  2. 根据权利要求1所述的液位组件，其特征在于，所述液位计距离所述箱体的最高液面高度的距离大于所述液位计的盲区距离。
  3. 根据权利要求1所述的液位组件，其特征在于，所述支架可折叠设于所述箱体上。
  4. 根据权利要求1所述的液位组件，其特征在于，所述支架为把手，所述把手开设有收容腔，所述液位计安装于所述收容腔内，所述液位计的检测波垂直入射于所述液面上。
  5. 根据权利要求4所述的液位组件，其特征在于，所述收容腔与所述箱体相连通，所述液位计的检测波可直接入射至所述液面上。
  6. 根据权利要求5所述的液位组件，其特征在于，所述支架与所述箱体为一体结构。
  7. 根据权利要求1所述的液位组件，其特征在于，所述支架可伸缩设于所述箱体上。
  8. 根据权利要求1所述的液位组件，其特征在于，所述液位计可拆卸设于所述支架上。
  9. 根据权利要求1所述的液位组件，其特征在于，所述液位计为反射式液位计。
  10. 根据权利要求1-9任一所述的液位组件，其特征在于，所述液位计的外表面包覆有保护膜层。
  11. 一种装置，其特征在于，包括权利要求1-10任一所述的液位组件及中心体，所述液位组件与所述中心体可拆卸连接。
  12. 根据权利要求11所述的装置，其特征在于，所述支架可伸缩设于所述中心体上。
  13. 根据权利要求11所述的装置，其特征在于，还包括飞行控制系统，所述液位组件与所述飞行控制系统通讯连接。
  14. 根据权利要求13所述的装置，其特征在于，还包括定位装置及电源，所述定位装置及电源均与所述飞行控制系统通讯连接。
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