WO2018094632A1 - 液位计、农业植保机及液位判断方法 - Google Patents

液位计、农业植保机及液位判断方法 Download PDF

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Publication number
WO2018094632A1
WO2018094632A1 PCT/CN2016/107029 CN2016107029W WO2018094632A1 WO 2018094632 A1 WO2018094632 A1 WO 2018094632A1 CN 2016107029 W CN2016107029 W CN 2016107029W WO 2018094632 A1 WO2018094632 A1 WO 2018094632A1
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WO
WIPO (PCT)
Prior art keywords
liquid level
liquid
water tank
level
hall sensor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/107029
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English (en)
French (fr)
Inventor
卢绰莹
石萌萌
韩振
吴晓龙
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SZ DJI Technology Co Ltd
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SZ DJI Technology Co Ltd
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Filing date
Publication date
Application filed by SZ DJI Technology Co Ltd filed Critical SZ DJI Technology Co Ltd
Priority to CN202011050502.7A priority Critical patent/CN112082625A/zh
Priority to PCT/CN2016/107029 priority patent/WO2018094632A1/zh
Priority to CN201680003440.XA priority patent/CN107110695B/zh
Publication of WO2018094632A1 publication Critical patent/WO2018094632A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating 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
    • G01F23/32Indicating 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 using rotatable arms or other pivotable transmission elements
    • G01F23/38Indicating 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 using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/0089Regulating or controlling systems

Definitions

  • the invention relates to the technical field of agricultural plant protection machines, in particular to a liquid level meter, an agricultural plant protection machine and a liquid level determination method.
  • the agricultural plant protection machine is a drone for the protection of agricultural and forestry plants.
  • the plant protection machine can be used for spraying, spraying pesticides, seeds and powders.
  • the plant protection machine is petite and powerful, can load pesticides and spray pesticides at low altitudes, and its spraying efficiency is much higher than traditional labor.
  • pesticides or fertilizers are generally contained in the water tank equipped with the plant protection machine. Since the general water tank is not transparent, the total amount of liquid in the water tank cannot be known in real time during the injection of liquid or liquid. Therefore, there is often a problem that excessive liquid is injected into the water tank or the liquid in the water tank is completely exhausted and undetectable.
  • the invention provides a liquid level meter, an agricultural plant protection machine and a liquid level determination method.
  • a liquid level gauge for mounting on a water tank for detecting a liquid level of a liquid in a water tank
  • the liquid level gauge comprising: a fixing portion, a floating portion, and a Hall sensor And a fixing portion for fixing to the water tank, the floating portion is connected to the fixing portion for rotating around the fixing portion under buoyancy of liquid, and the Hall sensor is disposed at the a fixing portion, the magnet is disposed on the floating portion; when the floating portion is rotated relative to the fixing portion, a distance between an N pole and an S pole of the magnet and the Hall sensor is changed The change causes the Hall sensor to perform a switching action to indicate whether the liquid level of the liquid in the water tank reaches a preset liquid level.
  • an agricultural plant protection machine comprising: a machine body, a machine arm connected to the machine body, and a power component disposed on the machine arm, the agricultural plant protection machine further comprising: A water tank for loading the pesticide and at least one level gauge as described above, at least one of which is disposed on the water tank.
  • a liquid level determining method for detecting a liquid level state of a liquid in a water tank by using the liquid level meter as described above, wherein the liquid level determining method comprises:
  • the liquid level gauge at the preset liquid level, one of an N pole and an S pole of the magnet being located above the other one; when the N pole of the magnet is close to the Hall sensor, The Hall sensor outputs a high level; when the S pole of the magnet is close to the Hall sensor, the Hall sensor outputs a low level;
  • Determining a liquid level state of the liquid in the water tank when the level of the output of the Hall sensor changes between a high level and a low level, determining whether the liquid level of the liquid in the water tank reaches the preset liquid Bit.
  • the liquid level gauge of the present invention when the floating portion is rotated relative to the fixed portion, the distance between the N pole and the S pole of the magnet and the Hall sensor is changed to cause the Hall sensor to perform a switching operation to indicate whether the liquid level of the liquid in the water tank reaches the pre-predetermined state.
  • Set the liquid level to feedback the liquid level information for display or reminder to remind the user that the liquid level in the water tank has reached the predetermined height.
  • the distance between the N pole and the S pole of the magnet and the Hall sensor is changed to cause the Hall sensor to perform a switching operation to display the liquid in the water tank Whether the liquid level reaches the preset liquid level, so as to feedback the liquid level information for display or reminding, to prompt the user that the liquid level of the liquid in the plant protection machine has reached the predetermined height.
  • the liquid level judging method of the present invention passes through the N pole and the S pole of the magnet of the liquid level gauge The distance of the sensor is changed so that the Hall sensor performs a switching action to indicate whether the liquid level of the liquid in the water tank reaches a preset liquid level, and when the Hall sensor outputs a low level, it is determined that the current liquid level of the liquid in the water tank is obtained. Lower than the preset liquid level; when the Hall sensor outputs a high level, it is determined that the current liquid level of the liquid in the water tank is higher than the preset liquid level, thereby feeding back the liquid level information for display or reminding To remind the user that the liquid level in the water tank has reached the predetermined height.
  • FIG. 1 is a schematic perspective view of a liquid level gauge according to an embodiment of the present invention.
  • Figure 2 is a schematic exploded view of the level gauge shown in Figure 1.
  • Figure 3 is a front elevational view of the level gauge shown in Figure 1.
  • Figure 4 is a cross-sectional view of the level gauge shown in Figure 3.
  • FIG. 5 to 7 are schematic views showing the operation state of a liquid level determining method using the liquid level gauge shown in Fig. 1.
  • FIG. 8 to 11 are schematic views showing the operation state of another liquid level determining method using the liquid level gauge shown in Fig. 1.
  • Figure 12 is a flow chart showing the operation of the level gauge of the water tank in the plant protection machine according to an embodiment of the present invention.
  • liquid level gauge the agricultural plant protection machine and the liquid level determination method of the present invention will be described in detail below with reference to the accompanying drawings.
  • the features of the embodiments and embodiments described below may be combined with each other without conflict.
  • an embodiment of the present invention provides a liquid level gauge 1 for mounting on a water tank to detect a liquid level of a liquid in a water tank.
  • the liquid level gauge 1 includes a fixing portion 10, The floating portion 20, the Hall sensor 30, and the magnet 40.
  • the fixing portion 10 is fixedly disposed on the water tank, and the floating portion 20 is connected to the fixing portion 10 for rotating around the fixing portion 10 under the buoyancy of liquid, and the Hall sensor 30 is disposed on the The magnet 40 is disposed on the floating portion 20 on the fixing portion 10.
  • the liquid level gauge of the present invention when the floating portion is rotated relative to the fixed portion, the distance between the N pole and the S pole of the magnet and the Hall sensor is changed to cause the Hall sensor to perform a switching operation to indicate whether the liquid level of the liquid in the water tank reaches the pre-predetermined state.
  • Set the liquid level to feedback the liquid level information for display or reminder to remind the user that the liquid level in the water tank has reached the predetermined height.
  • the fixing portion 10 is provided with a connecting portion 110.
  • the Hall sensor 30 is disposed in the connecting portion 110, and the magnet 40 is disposed in the floating portion 20.
  • the floating portion 20 is provided with a fitting portion 210.
  • the engaging portion 210 is rotatably connected to the connecting portion 110, thereby enabling the floating portion 20 to rotate relative to the fixing portion 10.
  • the connecting portion 110 is provided with a rotating shaft 111, and the rotating shaft 111 is disposed along a radial direction of the connecting portion 110, and the rotating shaft 111 is The two free ends protrude from the connecting portion 110, respectively.
  • the two engaging portions 210 are respectively rotatably connected to the two free ends of the rotating shaft 111 on both sides of the connecting portion 110, so that the floating portion 20 can be opposite to the The fixing portion 10 is rotated.
  • the mating portion 210 is provided with a sleeve portion 212. The sleeve portion 212 is sleeved on the rotating shaft 111, and the mating portion 210 is rotatably connected to the connecting portion 110.
  • a second way of rotating the floating portion 20 relative to the fixing portion 10 is: a receiving space is disposed in the connecting portion 110, a rotating shaft 111 is disposed in the receiving space, and the rotating shaft 111 is along the connecting portion 110 Radial setting.
  • the engaging portion 210 is rotatably coupled to the rotating shaft 111 in the receiving space, and the floating portion 20 can also be rotated relative to the fixed portion 10.
  • the floating portion 20 is rotated relative to the fixing portion 10 and It is not limited to the above two methods, and any manner in which the floating portion 20 is rotated relative to the fixed portion 10 is within the scope of the present invention.
  • the connecting portion 110 is provided with a limiting portion 112, and the engaging portion 210 is provided with a resisting portion 211, when the floating portion 20 is opposite When the fixing portion 10 is rotated until the resisting portion 211 touches the corresponding limiting portion 112, the rotation of the floating portion 20 around the fixing portion 10 is stopped, thereby functioning as a limit.
  • the limiting portion 112 is disposed along the radial direction of the connecting portion 110 , and the two free ends of the limiting portion 112 respectively protrude from the connecting portion 110 .
  • the two engaging portions 210 are respectively provided with the abutting portions 211, and the two abutting portions 211 are respectively engaged with the two free ends of the limiting portion 112, and when the floating portion 20 is opposite to the fixed portion When the portion 10 is rotated until the resisting portion 211 touches the free end of the corresponding limiting portion 112, the rotation of the floating portion 20 about the fixed portion 10 is stopped.
  • one of the two abutting portions 211 is located above the free end of the corresponding limiting portion 112
  • the other abutting portion 211 is located below the free end of the corresponding limiting portion 112 .
  • the floating portion 20 When the floating portion 20 is rotated clockwise relative to the fixing portion 10 until the resisting portion 211 located above the free end of the corresponding limiting portion 112 touches the free end of the corresponding limiting portion 112, the floating is restricted. The portion 20 continues to rotate clockwise about the fixed portion 10. When the floating portion 20 is rotated counterclockwise with respect to the fixing portion 10 to the free end of the corresponding limiting portion 112 when the resisting portion 211 located below the free end of the corresponding limiting portion 112 touches the free end of the corresponding limiting portion 112, the floating is restricted The portion 20 continues to rotate counterclockwise about the fixed portion 10.
  • the Hall sensor 30 is disposed in the connecting portion 110 of the fixing portion 10, and the liquid level gauge 1 further includes a first end cover 120, the first end cover 120 is disposed on the fixing portion 10 away from the end of the floating portion 20. After the Hall sensor 30 is installed in the connecting portion 110 of the fixing portion 10, the first end cover 120 is connected to the end of the fixing portion 10, thereby the Hall sensor. 30 is enclosed in the fixing portion 10.
  • the Hall sensor 30 is disposed in an end of the connecting portion 110 near the floating portion 20.
  • the magnet 40 is disposed in the floating portion 20, the liquid level gauge 1 further includes a second end cover 220, and the second end cover 220 is disposed on the floating portion 20 It is away from the end of the fixing portion 10. After the magnet 40 is installed in the floating portion 20, the second end cover 220 is connected to the end of the floating portion 20, and the magnet 40 is enclosed in the floating portion 20. Optionally, the magnet 40 is disposed in an end of the floating portion 20 near the fixing portion 10.
  • the fixing portion 10 of the liquid level gauge 1 is fixedly disposed on an outer sidewall of the water tank, the connecting portion 110 is located in the water tank, and the floating portion 20 rotates in the water tank. Connected to the connecting portion 110.
  • the liquid level gauge 1 further includes a sealing ring 50 that is sleeved on the fixing portion 10 for sealing the fixing portion 10 from the water tank.
  • the fixing portion 10 is a disk body, and a central portion of the fixing portion 10 is provided with a mounting portion 130.
  • the connecting portion 110 is connected to the mounting portion 130, and the sealing ring 50 is sleeved on the mounting portion.
  • the fixing portion 10 is sealed to the water tank in the portion 130, and the mounting portion 130 facilitates attachment and detachment of the fixing portion 10.
  • the fixing portion 10 is provided with a plurality of mounting holes 140. When the liquid level gauge 1 is installed, a fastener is passed through the mounting hole 140 of the fixing portion 10, and then fixed on the water tank, thereby The level gauge 1 is fixed to the water tank.
  • the liquid level gauge 1 further includes a processor, and when the Hall sensor 30 performs a switching operation, sends a signal indicating whether the liquid level of the liquid in the water tank reaches a preset liquid level to the
  • the processor is configured to display or remind, thereby prompting the user that the liquid level of the liquid in the water tank has reached a predetermined height.
  • liquid level determination method of the liquid level gauge 1 of the present invention will be described:
  • the distance between the N pole and the S pole of the magnet 40 and the Hall sensor 30 is changed to thereby cause Hall.
  • the sensor 30 performs a switching action to indicate whether the current liquid level 70 of the liquid in the water tank 90 reaches the preset liquid level 60, thereby feeding back the liquid level information to the processor for display or reminding, The user is prompted to reach the predetermined level of liquid in the tank.
  • the magnet 40 includes an N pole and an S pole, and one of the N pole and the S pole of the magnet 40 is located above the other one.
  • the level gauge 1 utilizes a unipolar Hall sensor to receive different magnetic poles and output different level signals to complete the liquid level measurement. Specifically, when the N pole of the magnet 40 is close to the Hall sensor 30, the Hall sensor 30 outputs a high level. When the S pole of the magnet 40 is close to the Hall sensor 30, the Hall sensor 30 outputs a low level.
  • the N pole of the magnet 40 is located above the S pole. Referring to FIG. 6, when the Hall sensor 30 outputs a low level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is lower than the preset liquid level 60 to prompt the user of the liquid level in the water tank. The scheduled height has not been reached. At this time, the S pole of the magnet 40 is close to the Hall sensor 30. Referring to FIG. 7, when the Hall sensor 30 outputs a high level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is higher than the preset liquid level 60 to prompt the user of the liquid level in the water tank. The scheduled height has been reached. At this time, the N pole of the magnet 40 is close to the Hall sensor 30.
  • the level of the output of the Hall sensor 30 changes between a high level and a low level, it is also possible to judge whether the liquid level of the liquid in the water tank 90 has arrived by the liquid level gauge 1 of the present invention.
  • the preset liquid level Specifically, when the level of the output of the Hall sensor 30 changes from a low level to a high level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is raised from the preset liquid level 60 to The preset liquid level 60. When the level of the output of the Hall sensor 30 changes from a high level to a low level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is lowered from the preset liquid level 60 to the preset. Level 60.
  • the liquid level gauge of the present invention when the floating portion is rotated relative to the fixed portion, the distance between the N pole and the S pole of the magnet and the Hall sensor is changed to cause the Hall sensor to perform a switching operation to display the liquid in the water tank. Whether the liquid level reaches the preset liquid level, thereby feeding back the liquid level information to the processor for display or reminding to prompt the user that the liquid level in the water tank has reached the predetermined height.
  • An embodiment of the present invention further provides an agricultural plant protection machine, comprising: a machine body, a machine arm connected to the machine body, and a power component disposed on the machine arm, the agricultural plant protection machine further comprising: A pesticide-carrying water tank and at least one level gauge as described above, at least one of said level gauges being disposed on said water tank.
  • the flying plant protection machine is a multi-rotor aircraft. It should be noted that the description about the liquid level gauge in the embodiments and embodiments as described above is equally applicable to the agricultural plant protection machine of the present invention.
  • At least one of the liquid level gauges 1 includes a first liquid level gauge 1A and a second liquid level gauge 1B, and the first liquid level gauge 1A is installed close to the The position of the bottom of the water tank 90, the second level gauge 1B is installed near the top of the water tank 90.
  • liquid level determination method of the liquid level gauge in the agricultural plant protection machine of the present invention will be described:
  • the distance between the N pole and the S pole of the magnet and the Hall sensor is changed to thereby make the Hall sensor Performing a switching action to indicate whether the liquid level of the liquid in the water tank reaches the preset liquid level, thereby feeding back the liquid level information to the processor for display or reminding, thereby judging the liquid level state in the water tank, thereby prompting the user in the water tank of the plant protection machine
  • the liquid level has reached the predetermined height.
  • the Hall sensor 30 of the first liquid level gauge 1A outputs a low level, it is judged that the current liquid in the water tank 90 is obtained.
  • the liquid level 70 is lower than the first liquid level 610.
  • the liquid approaches from above and submerges the fixing portion 10 of the first level gauge 1A located at the first liquid level 610, and the floating portion 20 rotates from above to below the fixing portion 10, and the magnet 40 approaches the N pole from the N pole.
  • the sensor 30 is rotated to the S pole close to the Hall sensor 30, so the level of the output changes from high to low.
  • the Hall sensor 30 of the second level gauge 1B when the water tank 90 is in a liquid filling process (ie, injecting liquid), and the Hall sensor 30 of the second level gauge 1B outputs a high level, it is determined that the current liquid in the water tank 90 is obtained.
  • the liquid level 70 is higher than the second liquid level 620.
  • the liquid approaches from the bottom up and submerges the fixed portion 10 of the second level gauge 1B at the second liquid level 620.
  • the floating portion 20 rotates from below to the upper portion of the fixed portion 10, and the magnet 40 approaches the Hall from the S pole.
  • Sensor 30 is rotated to N It is very close to the Hall sensor 30, so the level of the output changes from low to high.
  • the current liquid level 70 of the liquid in the water tank 90 is between the first liquid level 610 and the second liquid level 620 as shown in FIG. .
  • the above two judgment methods can be used to judge the liquid level state in the water tank.
  • the embodiment of the present invention further provides a liquid level determining method using the liquid level gauge 1 as described above for detecting the liquid level state of the liquid in the water tank 90. It should be noted that the description about the liquid level gauge 1 in the embodiments and embodiments as described above is also applicable to the liquid level determining method of the present invention.
  • the liquid level determination method includes:
  • Step S1 A preset liquid level 60 is set on the water tank 90, as shown in FIG.
  • Step S2 setting the liquid level gauge 1 at the preset liquid level 60, the magnet 40 of the liquid level gauge 1 includes an N pole and an S pole, and one of the N pole and the S pole of the magnet 40 Located above the other one.
  • the Hall sensor 30 When the N pole of the magnet 40 is close to the Hall sensor 30, the Hall sensor 30 outputs a high level.
  • the S pole of the magnet 40 When the S pole of the magnet 40 is close to the Hall sensor 30, the Hall sensor 30 outputs a low level.
  • Step S3 determining the liquid level state of the liquid in the water tank 90: when the level of the output of the Hall sensor 30 changes between a high level and a low level, determining whether the liquid level of the liquid in the water tank 90 is The preset liquid level is reached.
  • the N pole of the magnet 40 is located above the S pole.
  • the Hall sensor 30 When the Hall sensor 30 outputs a low level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is lower than the preset liquid level 60, as shown in FIG.
  • the Hall sensor 30 When the Hall sensor 30 outputs a high level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is higher than the preset liquid level 60, as shown in FIG.
  • the level of the output of the Hall sensor 30 changes from a low level to a high level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is lower than the preset liquid level 60. Raised to the preset level 60.
  • the level of the output of the Hall sensor 30 changes from a high level to a low level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is lowered from the preset liquid level 60 to the preset. Level 60.
  • the preset liquid level 60 includes a first liquid level 610 and a second liquid level 620 , and the first liquid level 610 is located at the second liquid level 620 .
  • the liquid level gauge 1 includes a first liquid level gauge 1A and a second liquid level gauge 1B, and the liquid level determining method is used to detect the water tank 90 when the water tank 90 is in a liquid adding process or a liquid discharging process.
  • the liquid level of the liquid further includes:
  • Step S11 The first liquid level 610 and the second liquid level 620 are set on the water tank 90.
  • Step S21 setting the first liquid level gauge 1A at the first liquid level 610, and setting the second liquid level gauge 1B at the second liquid level 620, as shown in FIG.
  • Step S31 determining the liquid level state of the liquid in the water tank 90: when the water tank 90 is in the liquid discharging process, and the Hall sensor 30 of the first liquid level gauge 1A outputs a low level, it is determined that the water tank 90 is obtained.
  • the current liquid level 70 of the medium liquid is lower than the first liquid level 610, as shown in FIG.
  • the Hall sensor 30 of the second liquid level gauge 1B outputs a high level, it is determined that the current liquid level 70 of the liquid in the water tank 90 is higher than the second liquid level. 620, as shown in FIG.
  • the liquid level determining method further includes an alerting step S4, the alerting step S4 comprising:
  • Step S41 Set the value of the first liquid level 610 to a liquid addition alarm trigger value, and set the value of the second liquid level 620 to stop the liquid addition alarm trigger value.
  • Step S42 When it is determined that the current liquid level 70 of the liquid in the water tank 90 is lower than the first liquid level 610, the liquid filling alarm is triggered to prompt the user to perform a liquid adding operation on the water tank. When it is judged that the current liquid level 70 of the liquid in the water tank 90 is higher than the second liquid level 620, the liquid filling alarm is triggered to prompt the user to stop adding liquid to the water tank.
  • the liquid level determining method is used to detect the liquid level of the liquid in the water tank 90 of the plant protection machine. Since the plant protection machine is flying in the air, the liquid in the water tank is fluctuating, and the degree of vibration of the liquid in the water tank is largely caused by the posture change of the plant protection machine. Therefore, before determining the liquid level state of the liquid in the water tank 90, the liquid level determining method of the present invention further includes the steps of: acquiring current posture information of the plant protection machine, and determining whether the plant protection machine is in a stable state. The liquid level determining method is executed when it is judged that the plant protection machine is in a stable state.
  • the attitude information includes at least one of a pitch angle, a roll angle, and a yaw angle.
  • the plant protection machine is determined to be in a stable state by differentiating the data of the flight control posture of the plant protection machine, and if the posture differential data is less than the set threshold within a certain period of time, the plant protection machine is considered to be in a stable attitude. status.
  • a first liquid level and a second liquid level are set on the water tank of the plant protection machine, and a first liquid level meter is set at the first liquid level, and a second liquid level meter is set at the second liquid level.
  • the next step is performed.
  • Judging the liquid level state of the liquid in the water tank of the plant protection machine when the water tank is in the liquid discharging process, and the Hall sensor of the first liquid level meter outputs a low level, it is determined that the current liquid level of the liquid in the water tank is low At the first liquid level.
  • the Hall sensor of the second liquid level meter When the water tank is in the liquid adding process, and the Hall sensor of the second liquid level meter outputs a high level, it is determined that the current liquid level of the liquid in the water tank is higher than the second liquid level.

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

一种液位计(1)、农业植保机及液位判断方法。其中,液位计(1)用于装设于水箱(90)上以检测水箱(90)中液体的液位,液位计(1)包括:固定部(10)、浮动部(20)、霍尔传感器(30)以及磁体(40);固定部(10)用于固定设置于水箱(90)上,浮动部(20)连接于所述固定部(10)用于在液体的浮力下绕固定部(10)转动,霍尔传感器(30)设置于固定部(10)上,磁体(40)设置于浮动部(20)上;当浮动部(20)相对于固定部(10)转动时,磁体(40)的N极和S极与霍尔传感器(30)的距离改变从而使霍尔传感器(30)进行开关动作以显示水箱(90)中液体的液位是否到达预设液位。

Description

液位计、农业植保机及液位判断方法 技术领域
本发明涉及农业植保机技术领域,特别涉及液位计、农业植保机及液位判断方法。
背景技术
农业植保机,是用于农林植物保护作业的无人驾驶飞机。植保机可以实现喷洒作业,用于喷洒药剂、种子和粉剂等。植保机体型娇小而功能强大,可负载农药并在低空喷洒农药,其喷洒效率远高于传统人工。
通常情况下,农药或化肥一般容置在植保机配备的水箱中,由于一般的水箱并非为透明的,在注入液体或者液体流出的过程中,并不能实时的了解到水箱中液体的总量,因此经常会出现水箱内注入过多液体或者水箱内的液体已经完全流出耗尽而无法察觉的问题。
发明内容
本发明提供一种液位计、农业植保机及液位判断方法。
根据本发明实施例的第一方面,提供一种液位计,其用于装设于水箱上以检测水箱中液体的液位,所述液位计包括:固定部、浮动部、霍尔传感器以及磁体;所述固定部用于固定设置于所述水箱上,所述浮动部连接于所述固定部用于在液体的浮力下绕所述固定部转动,所述霍尔传感器设置于所述固定部上,所述磁体设置于所述浮动部上;当所述浮动部相对于所述固定部转动时,所述磁体的N极和S极与所述霍尔传感器的距离改 变从而使所述霍尔传感器进行开关动作以显示所述水箱中液体的液位是否到达预设液位。
根据本发明实施例的第二方面,提供一种农业植保机,包括机体、与所述机体连接的机臂和设置在所述机臂上的动力组件,所述农业植保机还包括:用于装载农药的水箱以及至少一个如上所述的液位计,至少一个所述液位计设置于所述水箱上。
根据本发明实施例的第三方面,提供一种采用如上所述的液位计的液位判断方法,用于检测水箱中液体的液位状态,所述液位判断方法包括:
在所述水箱上设定预设液位;
在所述预设液位处设置所述液位计,所述磁体的N极和S极中的其中一个位于其中另一个的上方;当所述磁体的N极靠近所述霍尔传感器时,所述霍尔传感器输出高电平;当所述磁体的S极靠近所述霍尔传感器时,所述霍尔传感器输出低电平;
判断所述水箱中液体的液位状态:当所述霍尔传感器输出的电平在高电平和低电平之间发生变化时,判断所述水箱中液体的液位是否到达所述预设液位。
本发明的液位计,通过浮动部相对于固定部转动时,磁体的N极和S极与霍尔传感器的距离改变从而使霍尔传感器进行开关动作以显示水箱中液体的液位是否到达预设液位,从而反馈液位信息以进行显示或提醒,以提示用户水箱中液体的液位已到达预定高度。
本发明的农业植保机,通过所述液位计的浮动部相对于固定部转动时,磁体的N极和S极与霍尔传感器的距离改变从而使霍尔传感器进行开关动作以显示水箱中液体的液位是否到达预设液位,从而反馈液位信息以进行显示或提醒,以提示用户植保机的水箱中液体的液位已到达预定高度。
本发明的液位判断方法,通过所述液位计的磁体的N极和S极与霍 尔传感器的距离改变从而使霍尔传感器进行开关动作以显示水箱中液体的液位是否到达预设液位,当所述霍尔传感器输出低电平时,判断得到所述水箱中液体的当前液位低于所述预设液位;当所述霍尔传感器输出高电平时,判断得到所述水箱中液体的当前液位高于所述预设液位,从而反馈液位信息以进行显示或提醒,以提示用户水箱中液体的液位已到达预定高度。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1是本发明一实施例示出的液位计的立体示意图。
图2是图1所示的液位计的爆炸示意图。
图3是图1所示的液位计的正视图。
图4是图3所示的液位计的剖视图。
图5至图7是采用图1所示的液位计的一种液位判断方法的工作状态示意图。
图8至图11是采用图1所示的液位计的另一种液位判断方法的工作状态示意图。
图12是本发明一实施例示出的植保机中水箱的液位计的工作流程图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
这里将详细地对示例性实施例进行说明,其示例表示在附图中。下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反,它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
在本发明使用的术语是仅仅出于描述特定实施例的目的,而非旨在限制本发明。在本发明和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式,除非上下文清楚地表示其他含义。还应当理解,本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
下面结合附图,对本发明的液位计、农业植保机及液位判断方法进行详细说明。在不冲突的情况下,下述的实施例及实施方式中的特征可以相互组合。
参见图1至图4所示,本发明实施例提供一种液位计1,其用于装设于水箱上以检测水箱中液体的液位,所述液位计1包括:固定部10、浮动部20、霍尔传感器30以及磁体40。所述固定部10用于固定设置于所述水箱上,所述浮动部20连接于所述固定部10用于在液体的浮力下绕所述固定部10转动,所述霍尔传感器30设置于所述固定部10上,所述磁体40设置于所述浮动部20上。当所述浮动部20相对于所述固定部10转动 时,所述磁体40的N极和S极与所述霍尔传感器30的距离改变从而使所述霍尔传感器30进行开关动作以显示所述水箱中液体的液位是否到达预设液位。
本发明的液位计,通过浮动部相对于固定部转动时,磁体的N极和S极与霍尔传感器的距离改变从而使霍尔传感器进行开关动作以显示水箱中液体的液位是否到达预设液位,从而反馈液位信息以进行显示或提醒,以提示用户水箱中液体的液位已到达预定高度。
在本发明一实施方式中,所述固定部10上设有连接部110,所述霍尔传感器30设置于所述连接部110内,所述磁体40设置于所述浮动部20内。所述浮动部20上设有配合部210,所述配合部210转动连接于所述连接部110,进而使所述浮动部20能够相对于所述固定部10转动。
以下对所述浮动部20相对于所述固定部10转动的方式进行说明:
所述浮动部20相对于所述固定部10转动的第一种方式:所述连接部110上设置有转轴111,所述转轴111沿所述连接部110的径向设置,所述转轴111的两自由端分别凸出于所述连接部110。所述配合部210为两个,所述两个配合部210于所述连接部110的两侧分别转动连接于所述转轴111的两自由端,可以使所述浮动部20能够相对于所述固定部10转动。可选地,所述配合部210上设有套设部212,所述套设部212套设于所述转轴111,进而将所述配合部210转动连接于所述连接部110。
所述浮动部20相对于所述固定部10转动的第二种方式:所述连接部110内设有收容空间,所述收容空间内设置有转轴111,所述转轴111沿所述连接部110的径向设置。所述配合部210于所述收容空间内转动连接于所述转轴111,同样可以使所述浮动部20能够相对于所述固定部10转动。
需要说明的是,所述浮动部20相对于所述固定部10转动的方式并 不仅仅局限于上述两种方式,任意可以实现所述浮动部20相对于所述固定部10转动的方式都属于本发明保护的范围。
结合图2和图3所示,在本发明一实施方式中,所述连接部110上设置有限位部112,所述配合部210上设有抵持部211,当所述浮动部20相对所述固定部10转动到所述抵持部211触碰到对应的限位部112时,所述浮动部20绕所述固定部10的转动停止,进而起到限位的作用。在图2和图3所示的实施例中,所述限位部112沿所述连接部110的径向设置,所述限位部112的两自由端分别凸出于所述连接部110。所述两个配合部210上分别设有所述抵持部211,两个抵持部211分别与所述限位部112的两自由端相配合,进而当所述浮动部20相对所述固定部10转动到抵持部211触碰到对应的限位部112的自由端时,所述浮动部20绕所述固定部10的转动停止。可选地,两个抵持部211中的一个抵持部211位于对应的限位部112的自由端的上方,另一个抵持部211位于对应的限位部112的自由端的下方。当所述浮动部20相对所述固定部10顺时针转动到位于对应的限位部112的自由端的上方的抵持部211触碰到对应的限位部112的自由端时,限制所述浮动部20继续绕所述固定部10顺时针转动。当所述浮动部20相对所述固定部10逆时针转动到位于对应的限位部112的自由端的下方的抵持部211触碰到对应的限位部112的自由端时,限制所述浮动部20继续绕所述固定部10逆时针转动。
在本发明一实施方式中,所述霍尔传感器30装设在所述固定部10的所述连接部110内,所述液位计1还包括第一端盖120,所述第一端盖120设置在所述固定部10上远离所述浮动部20的端部。当所述霍尔传感器30装设在所述固定部10的所述连接部110内后,将所述第一端盖120连接在所述固定部10的端部,进而将所述霍尔传感器30封闭在所述固定部10内。可选地,所述霍尔传感器30装设在所述连接部110中靠近所述浮动部20的端部。
在本发明一实施方式中,所述磁铁40装设在所述浮动部20内,所述液位计1还包括第二端盖220,所述第二端盖220设置在所述浮动部20上远离所述固定部10的端部。当所述磁铁40装设在所述浮动部20内后,将所述第二端盖220连接在所述浮动部20的端部,进而将所述磁铁40封闭在所述浮动部20内。可选地,所述磁铁40装设在所述浮动部20中靠近所述固定部10的端部。
在本发明一实施方式中,所述液位计1的固定部10固定设置于所述水箱的外侧壁,所述连接部110位于所述水箱内,所述浮动部20于所述水箱内转动连接于所述连接部110。所述液位计1还包括密封圈50,所述密封圈50套设于所述固定部10上,用于将所述固定部10与所述水箱密封。
可选地,所述固定部10为盘体,所述固定部10的中部设置有安装部130,所述连接部110连接于所述安装部130,所述密封圈50套设于所述安装部130上,将所述固定部10与所述水箱密封,所述安装部130便于对所述固定部10进行拆装作业。进一步地,所述固定部10上开设有多个安装孔140,所述液位计1安装时,采用紧固件穿过所述固定部10的安装孔140后固定在水箱上,进而将所述液位计1固定在水箱上。
在本发明一实施方式中,所述液位计1还包括处理器,当所述霍尔传感器30进行开关动作时将所述水箱中液体的液位是否到达预设液位的信号发送给所述处理器以进行显示或提醒,进而提示用户水箱中液体的液位已到达预定高度。
以下,对本发明的液位计1的液位判断方法进行说明:
参见图5所示,本发明的液位计1在实际工作中,通过浮动部20相对于固定部10转动时,磁体40的N极和S极与霍尔传感器30的距离改变从而使霍尔传感器30进行开关动作以显示水箱90中液体的当前液位70是否到达预设液位60,从而向处理器反馈液位信息以进行显示或提醒,以 提示用户水箱中液体的液位已到达预定高度。其中,所述磁体40包括N极和S极,所述磁体40的N极和S极中的其中一个位于其中另一个的上方。液位计1利用单极性霍尔传感器,收到磁极的不同,而输出不同的电平信号来完成液位测量。具体地,当所述磁体40的N极靠近所述霍尔传感器30时,所述霍尔传感器30输出高电平。当所述磁体40的S极靠近所述霍尔传感器30时,所述霍尔传感器30输出低电平。
在本发明一实施方式中,所述磁体40的N极位于S极的上方。参见图6所示,当所述霍尔传感器30输出低电平时,判断得到所述水箱90中液体的当前液位70低于所述预设液位60,以提示用户水箱中液体的液位未到达预定高度。此时所述磁体40的S极靠近所述霍尔传感器30。参见图7所示,当所述霍尔传感器30输出高电平时,判断得到所述水箱90中液体的当前液位70高于所述预设液位60,以提示用户水箱中液体的液位已到达预定高度。此时所述磁体40的N极靠近所述霍尔传感器30。
进一步地,当所述霍尔传感器30输出的电平在高电平和低电平之间发生变化时,同样可以通过本发明的液位计1来判断所述水箱90中液体的液位是否到达所述预设液位。具体地,当所述霍尔传感器30输出的电平由低电平变为高电平时,判断得到所述水箱90中液体的当前液位70由低于所述预设液位60升高至所述预设液位60。当所述霍尔传感器30输出的电平由高电平变为低电平时,判断得到所述水箱90中液体的当前液位70由高于所述预设液位60降低至所述预设液位60。
综上所述,本发明的液位计,通过浮动部相对于固定部转动时,磁体的N极和S极与霍尔传感器的距离改变从而使霍尔传感器进行开关动作以显示水箱中液体的液位是否到达预设液位,从而向处理器反馈液位信息以进行显示或提醒,以提示用户水箱中液体的液位已到达预定高度。
本发明实施例还提供一种农业植保机,包括机体、与所述机体连接的机臂和设置在所述机臂上的动力组件,所述农业植保机还包括:用于装 载农药的水箱以及至少一个如上所述的液位计,至少一个所述液位计设置于所述水箱上。可选地,所述飞行植保机为多旋翼飞行器。需要说明的是,在如上所述的实施例和实施方式中关于所示液位计的描述同样适用于本发明的农业植保机。
参见图8所示,在本发明一实施方式中,至少一个所述液位计1包括第一液位计1A和第二液位计1B,所述第一液位计1A装设于靠近所述水箱90底部的位置,所述第二液位计1B装设于靠近所述水箱90顶部的位置。
以下,对本发明农业植保机中的液位计的液位判断方法进行说明:
本发明农业植保机中的液位计在实际工作中,通过所述液位计的浮动部相对于固定部转动时,磁体的N极和S极与霍尔传感器的距离改变从而使霍尔传感器进行开关动作以显示水箱中液体的液位是否到达预设液位,从而向处理器反馈液位信息以进行显示或提醒,以此判断水箱中的液位状态,进而提示用户植保机的水箱中液体的液位已到达预定高度。
参见图9所示,当所述水箱90处于放液过程(即放出液体),且所述第一液位计1A的霍尔传感器30输出低电平时,判断得到所述水箱90中液体的当前液位70低于所述第一液位610。此过程中液体从上向下接近并淹没位于第一液位610处的第一液位计1A的固定部10,浮动部20绕固定部10从上方转动到下方,磁铁40从N极靠近霍尔传感器30转动到S极靠近霍尔传感器30,因此输出的电平的变化为从高到低。
参见图10所示,当所述水箱90处于加液过程(即注入液体),且所述第二液位计1B的霍尔传感器30输出高电平时,判断得到所述水箱90中液体的当前液位70高于所述第二液位620。此过程中液体从下向上接近并淹没位于第二液位620处的第二液位计1B的固定部10,浮动部20绕固定部10从下方转动到上方,磁铁40从S极靠近霍尔传感器30转动到N 极靠近霍尔传感器30,因此输出的电平的变化为从低到高。
参见图11所示,当所述水箱90处在正常使用状态时,所述水箱90中液体的当前液位70处于如图11中所示的第一液位610和第二液位620之间。此时不论水箱90处于放液过程或是加液过程,都可以采用上述两种判断方法来判断水箱中的液位状态。
本发明实施例还提供一种采用如上所述的液位计1的液位判断方法,用于检测水箱90中液体的液位状态。需要说明的是,在如上所述的实施例和实施方式中关于所述液位计1的描述同样适用于本发明的液位判断方法。所述液位判断方法包括:
步骤S1:在所述水箱90上设定预设液位60,如图5所示。
步骤S2:在所述预设液位60处设置所述液位计1,所述液位计1的磁体40包括N极和S极,所述磁体40的N极和S极中的其中一个位于其中另一个的上方。当所述磁体40的N极靠近所述霍尔传感器30时,所述霍尔传感器30输出高电平。当所述磁体40的S极靠近所述霍尔传感器30时,所述霍尔传感器30输出低电平。
步骤S3:判断所述水箱90中液体的液位状态:当所述霍尔传感器30输出的电平在高电平和低电平之间发生变化时,判断所述水箱90中液体的液位是否到达所述预设液位。
在本发明一实施方式中,所述磁体40的N极位于S极的上方。当所述霍尔传感器30输出低电平时,判断得到所述水箱90中液体的当前液位70低于所述预设液位60,如图6所示。当所述霍尔传感器30输出高电平时,判断得到所述水箱90中液体的当前液位70高于所述预设液位60,如图7所示。
进一步地,当所述霍尔传感器30输出的电平由低电平变为高电平时,判断得到所述水箱90中液体的当前液位70由低于所述预设液位60 升高至所述预设液位60。当所述霍尔传感器30输出的电平由高电平变为低电平时,判断得到所述水箱90中液体的当前液位70由高于所述预设液位60降低至所述预设液位60。
结合图8所示,在本发明一实施方式中,所述预设液位60包括第一液位610和第二液位620,所述第一液位610位于所述第二液位620的下方。所述液位计1包括第一液位计1A和第二液位计1B,所述液位判断方法用于当所述水箱90处于加液过程或放液过程时,检测所述水箱90中液体的液位状态。所述液位判断方法进一步包括:
步骤S11:在所述水箱90上设定第一液位610和第二液位620。
步骤S21:在所述第一液位610处设置所述第一液位计1A,在所述第二液位620处设置所述第二液位计1B,如图8所示。
步骤S31:判断所述水箱90中液体的液位状态:当所述水箱90处于放液过程,且所述第一液位计1A的霍尔传感器30输出低电平时,判断得到所述水箱90中液体的当前液位70低于所述第一液位610,如图9所示。当所述水箱90处于加液过程,且所述第二液位计1B的霍尔传感器30输出高电平时,判断得到所述水箱90中液体的当前液位70高于所述第二液位620,如图10所示。
在本发明一实施方式中,所述液位判断方法进一步包括警报步骤S4,所述警报步骤S4包括:
步骤S41:将所述第一液位610的值设定为加液警报触发值,将所述第二液位620的值设定为停止加液警报触发值。
步骤S42:当判断得到所述水箱90中液体的当前液位70低于所述第一液位610时,触发加液警报,以提示用户对水箱进行加液操作。当判断得到所述水箱90中液体的当前液位70高于所述第二液位620时,触发停止加液警报,以提示用户停止对水箱加液。
在本发明一实施方式中,所述液位判断方法用于检测植保机的水箱90中液体的液位。由于植保机在空中飞行时,水箱内的液体是波动的,且水箱内的液体的抖动程度很大部分是植保机的姿态变化引起的。因此,本发明的液位判断方法,在判断所述水箱90中液体的液位状态之前,还包括步骤:获取所述植保机的当前姿态信息,判断所述植保机是否处于稳定状态。当判断得到所述植保机处于稳定状态时,才执行所述液位判断方法。可选地,所述姿态信息包括俯仰角、横滚角以及偏航角中的至少一种。
在本发明一实施方式中,通过对植保机的飞控姿态的数据进行微分来判断所述植保机是否处于稳定状态,如果姿态微分数据在一定时间内小于设定阈值则认为植保机处于姿态稳定状态。
参见图12所示,采用本发明的液位判断方法检测植保机的水箱90中液体的液位状态时,包括以下步骤:
在植保机的水箱上设定第一液位和第二液位,并在所述第一液位处设置第一液位计,在所述第二液位处设置第二液位计。
通过对植保机的飞控姿态的数据进行微分来判断植保机是否处于稳定状态,判断得到植保机处于姿态稳定状态时,才执行下一步骤。
判断植保机的水箱中液体的液位状态:当所述水箱处于放液过程,且所述第一液位计的霍尔传感器输出低电平时,判断得到所述水箱中液体的当前液位低于所述第一液位。当所述水箱处于加液过程,且所述第二液位计的霍尔传感器输出高电平时,判断得到所述水箱中液体的当前液位高于所述第二液位。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得 包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上对本发明实施例所提供的方法和装置进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。
本专利文件披露的内容包含受版权保护的材料。该版权为版权所有人所有。版权所有人不反对任何人复制专利与商标局的官方记录和档案中所存在的该专利文件或者该专利披露。

Claims (17)

  1. 一种液位计,其用于装设于水箱上以检测水箱中液体的液位,其特征在于,包括:固定部、浮动部、霍尔传感器以及磁体;所述固定部用于固定设置于所述水箱上,所述浮动部连接于所述固定部用于在液体的浮力下绕所述固定部转动,所述霍尔传感器设置于所述固定部上,所述磁体设置于所述浮动部上;当所述浮动部相对于所述固定部转动时,所述磁体的N极和S极与所述霍尔传感器的距离改变从而使所述霍尔传感器进行开关动作以显示所述水箱中液体的液位是否到达预设液位。
  2. 根据权利要求1所述的液位计,其特征在于,所述固定部上设有连接部,所述霍尔传感器设置于所述连接部内;所述浮动部上设有配合部,所述配合部转动连接于所述连接部。
  3. 根据权利要求2所述的液位计,其特征在于,所述连接部上设置有转轴,所述转轴沿所述连接部的径向设置,所述转轴的两自由端分别凸出于所述连接部;所述配合部为两个,所述两个配合部于所述连接部的两侧分别转动连接于所述转轴的两自由端。
  4. 根据权利要求2所述的液位计,其特征在于,所述连接部上设置有限位部,所述配合部上设有抵持部,当所述浮动部相对所述固定部转动到所述抵持部触碰到对应的限位部时,所述浮动部绕所述固定部的转动停止。
  5. 根据权利要求2所述的液位计,其特征在于,所述连接部内设有收容空间,所述收容空间内设置有转轴,所述转轴沿所述连接部的径向设置;所述配合部于所述收容空间内转动连接于所述转轴。
  6. 根据权利要求1所述的液位计,其特征在于,还包括密封圈,所述密封圈套设于所述固定部上,用于将所述固定部与所述水箱密封。
  7. 根据权利要求1所述的液位计,其特征在于,还包括第一端盖,所述第一端盖设置于所述固定部上远离所述浮动部的端部。
  8. 根据权利要求1所述的液位计,其特征在于,还包括第二端盖,所 述第二端盖设置于所述浮动部上远离所述固定部的端部。
  9. 根据权利要求1所述的液位计,其特征在于,还包括处理器,当所述霍尔传感器进行开关动作时将所述水箱中液体的液位是否到达预设液位的信号发送给所述处理器。
  10. 一种农业植保机,包括机体、与所述机体连接的机臂和设置在所述机臂上的动力组件,其特征在于,所述农业植保机还包括:用于装载农药的水箱以及至少一个如权利要求1-9中任一项所述的液位计,至少一个所述液位计设置于所述水箱上。
  11. 根据权利要求10所述的农业植保机,其特征在于,至少一个所述液位计包括第一液位计和第二液位计,所述第一液位计装设于靠近所述水箱底部的位置,所述第二液位计装设于靠近所述水箱顶部的位置。
  12. 一种采用如权利要求1-9中任一项所述的液位计的液位判断方法,用于检测水箱中液体的液位状态,其特征在于,包括:
    在所述水箱上设定预设液位;
    在所述预设液位处设置所述液位计,所述磁体的N极和S极中的其中一个位于其中另一个的上方;当所述磁体的N极靠近所述霍尔传感器时,所述霍尔传感器输出高电平;当所述磁体的S极靠近所述霍尔传感器时,所述霍尔传感器输出低电平;
    判断所述水箱中液体的液位状态:当所述霍尔传感器输出的电平在高电平和低电平之间发生变化时,判断所述水箱中液体的液位是否到达所述预设液位。
  13. 根据权利要求12所述的液位判断方法,其特征在于,所述磁体的N极位于S极的上方,当所述霍尔传感器输出的电平由低电平变为高电平时,判断得到所述水箱中液体的当前液位由低于所述预设液位升高至所述预设液位;当所述霍尔传感器输出的电平由高电平变为低电平时,判断得到所述水箱中液体的当前液位由高于所述预设液位降低至所述预设液位。
  14. 根据权利要求13所述的液位判断方法,其特征在于,所述预设液 位包括第一液位和第二液位,所述第一液位位于所述第二液位的下方;所述液位计包括第一液位计和第二液位计,所述液位判断方法用于当所述水箱处于加液过程或放液过程时,检测所述水箱中液体的液位状态;所述液位判断方法包括:
    在所述水箱上设定第一液位和第二液位;
    在所述第一液位处设置所述第一液位计,在所述第二液位处设置所述第二液位计;
    判断所述水箱中液体的液位状态:当所述水箱处于放液过程,且所述第一液位计的霍尔传感器输出低电平时,判断得到所述水箱中液体的当前液位低于所述第一液位;当所述水箱处于加液过程,且所述第二液位计的霍尔传感器输出高电平时,判断得到所述水箱中液体的当前液位高于所述第二液位。
  15. 根据权利要求14所述的液位判断方法,其特征在于,所述液位判断方法进一步包括警报步骤,所述警报步骤包括:
    将所述第一液位值设定为加液警报触发值,将所述第二液位值设定为停止加液警报触发值;
    当判断得到所述水箱中液体的当前液位低于所述第一液位时,触发加液警报;当判断得到所述水箱中液体的当前液位高于所述第二液位时,触发停止加液警报。
  16. 根据权利要求12所述的液位判断方法,其特征在于,所述液位判断方法用于检测植保机的水箱中液体的液位;
    在判断所述水箱中液体的液位状态之前,还包括步骤:获取所述植保机的当前姿态信息,判断所述植保机是否处于稳定状态;当判断得到所述植保机处于稳定状态时,才执行所述液位判断方法。
  17. 根据权利要求16所述的液位判断方法,其特征在于,所述姿态信息包括俯仰角、横滚角以及偏航角中的至少一种。
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