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Patent Searching and Data


Title:
LIQUID LEVEL MONITORING DEVICE AND PLANT PROTECTION UNMANNED AERIAL VEHICLE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2022/088207
Kind Code:
A1
Abstract:
Disclosed are a liquid level monitoring device and a plant protection unmanned aerial vehicle comprising same, relating to the technical field of unmanned aerial vehicles. The problem that a liquid level monitoring device is fixed mostly in a bonding manner and is not suitable for long-term use is solved. The liquid level monitoring device comprises: a driving wheel, a connecting line, a first magnet, a driven wheel, a floating ball, a second magnet, a third magnet and a Hall angle sensor, wherein the floating ball floats on a liquid level in a chemical box; the second magnet in the floating ball drives the first magnet on the connecting line to move up and down, so as to drive the driving wheel to rotate, and further drives the third magnet on a rotating shaft to rotate; the angle of rotation of the third magnet can be measured by the Hall angle sensor; a change in the length of the connecting line is obtained by means of the conversion of the angle of rotation; and a change in the liquid level in the chemical box is then obtained. The length of the connecting line and the liquid levels corresponding to different heights of the chemical box can be calibrated in advance, such that the corresponding liquid level in the chemical box can be visually obtained.

Inventors:
GAO LIANJIE (CN)
TIAN YU (CN)
REN LELE (CN)
Application Number:
PCT/CN2020/126244
Publication Date:
May 05, 2022
Filing Date:
November 03, 2020
Export Citation:
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Assignee:
NANJING TOPXGUN INSTITUTE OF AUTOPILOT TECH CO LTD (CN)
International Classes:
B64D1/18; G01F23/72; G01F23/46
Foreign References:
CN202048961U2011-11-23
CN2290842Y1998-09-09
CN207585725U2018-07-06
CN210119268U2020-02-28
CN2515662Y2002-10-09
CN110785639A2020-02-11
JPS5748614A1982-03-20
Attorney, Agent or Firm:
CHINABLE IP (CN)
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