Device and method for measuring amount of liquid chemical in plant protection unmanned aerial vehicle (UAV)
US11255713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2020 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Sep 4, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64U2101/35
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a device and method for measuring the amount of a liquid chemical in a plant protection unmanned aerial vehicle (UAV). An ultrasonic sensor is adopted to measure a distance between a liquid chemical level in a liquid chemical measuring tube communicated with a liquid chemical tank and a top end of the liquid chemical measuring tube, and then a height of the liquid chemical in the liquid chemical tank is further determined according to an acquired attitude angle of the UAV and a distance between a central position of the liquid chemical measuring tube and a central position of the liquid chemical tank, thereby accurately measuring the amount of the liquid chemical in the liquid chemical tank of the UAV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.