Title:
METHOD FOR RAPIDLY MONITORING AND DETERMINING DROUGHT CONDITION OF SUMMER CORN ON BASIS OF CHLOROPHYLL CONTENT BY USING UNMANNED AERIAL VEHICLE
Document Type and Number:
WIPO Patent Application WO/2024/061159
Kind Code:
A1
Abstract:
A method for rapidly monitoring and determining the drought condition of summer corn on the basis of chlorophyll content by using an unmanned aerial vehicle. The method comprises the following steps: 1) calculating vegetation indexes, i.e. an NDVI, an SAVI and an RENDVI, by means of a multi-spectral image acquired by using unmanned aerial vehicle multi-load low-altitude remote-sensing technology, and chlorophyll content actually measured on the ground; 2) selecting the vegetation indexes to respectively construct, with the actually measured chlorophyll content, regression equations in different growth periods, selecting, from among the regression equations, the regression equation having the highest correlation in each growth period, and using the selected regression equation as an optimal model equation in the growth period; 3) according to the optimal model equation, performing inversion to obtain the chlorophyll content in each growth period, and calibrating chlorophyll-content threshold values between different drought levels; and 4) obtaining, by means of real-time monitoring, a multi-spectral image of a plot to be subjected to measurement, calculating a required vegetation index, performing inversion to obtain the chlorophyll content, and comparing the chlorophyll content with the threshold values to determine a real-time drought condition level. The method is used for monitoring and determining the drought condition of summer corn, and has high precision, high speed, and universality.
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Inventors:
SONG WENLONG (CN)
LI MENGYI (CN)
LIU CHANGJUN (CN)
ZHOU PU (CN)
YU LANG (CN)
LU YIZHU (CN)
LIU YUN (CN)
LU WENJING (CN)
CHEN XIUHUA (CN)
CHEN LONG (CN)
LI MENGYI (CN)
LIU CHANGJUN (CN)
ZHOU PU (CN)
YU LANG (CN)
LU YIZHU (CN)
LIU YUN (CN)
LU WENJING (CN)
CHEN XIUHUA (CN)
CHEN LONG (CN)
Application Number:
PCT/CN2023/119395
Publication Date:
March 28, 2024
Filing Date:
September 18, 2023
Export Citation:
Assignee:
CHINA INST WATER RESOURCES & HYDROPOWER RES (CN)
International Classes:
G01N21/27; B64C39/02; G06F17/12
Domestic Patent References:
| WO2022175236A1 | 2022-08-25 |
Foreign References:
| CN115950838A | 2023-04-11 | |||
| CN107024439A | 2017-08-08 | |||
| CN108629494A | 2018-10-09 | |||
| CN110567891A | 2019-12-13 | |||
| CN111965117A | 2020-11-20 | |||
| CN113008843A | 2021-06-22 | |||
| CN113268923A | 2021-08-17 |
Other References:
刘涛 等 (LIU, TAO ET AL.): "利用无人机多光谱估算小麦叶面积指数和叶绿素含量 (Estimation of the Leaf Area Index and Chlorophyll Content of Wheat Using UAV Multi-spectrum Images)", 农业工程学报 (TRANSACTIONS OF THE CHINESE SOCIETY OF AGRICULTURAL ENGINEERING), vol. 37, no. 19, 31 October 2021 (2021-10-31)
QING WEI, ZHANG BAOZHONG; WEI ZHENG; HAN XIN; DUAN CHENFEI: "Estimation of Canopy Chlorophyll Content in Winter Wheat by UAV Multispectral Remote Sensing", JOURNAL OF TRITICEAE CROPS, vol. 40, no. 3, 7 January 2020 (2020-01-07), pages 365 - 372, XP093149270
QING WEI, ZHANG BAOZHONG; WEI ZHENG; HAN XIN; DUAN CHENFEI: "Estimation of Canopy Chlorophyll Content in Winter Wheat by UAV Multispectral Remote Sensing", JOURNAL OF TRITICEAE CROPS, vol. 40, no. 3, 7 January 2020 (2020-01-07), pages 365 - 372, XP093149270
Attorney, Agent or Firm:
ZJLH INTELLECTUAL PR0PERTY LAW FIRM (GENERAL PARTNER) (CN)
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