Patent ID: 11968920
Assignee: INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE, CAAS
Field: Other special machines (Mechanical engineering)
Classification: CPC A  Y | IPC A

Claim 0:
1. A system for multi-channel data acquisition and precision irrigation and fertilizer application control of crops, comprising:
a plant detection unit configured to perform the steps of: obtaining a plurality of sampling points within a planting area; and
obtaining soil moisture contents and plant status parameters through a plurality of detection channels at the sampling points, respectively, wherein the plant status parameter comprises infrared light reflectance, visible light reflectance, and/or chlorophyll fluorescence;
a requirement pre-estimation unit configured to perform the steps of: obtaining a required soil moisture content for plants within the planting area;
dividing the planting area into a plurality of homogeneous areas according to the soil moisture content and the plant status parameter at each sampling point;
obtaining the soil moisture content and the plant status parameter for plants within each homogeneous area;
calculating a required soil moisture content for plants within the homogeneous area based on a difference between the required soil moisture content for plants within the planting area and the soil moisture content for plants within the homogeneous area; and
obtaining types and quality of required fertilizers for plants within the homogeneous area based on the plant status parameter for plants within the homogeneous area;
a water and fertilizer blending unit configured to perform the step of: blending an irrigation water and fertilizer solution required by plants within the homogeneous area based on the required soil moisture content and the types and quality of the required fertilizers for plants within the homogeneous area; and
an areal irrigation unit configured to perform the step of: irrigating plants within each homogeneous area according to the irrigation water and fertilizer solution required by plants within the homogeneous area;
wherein:
the step of dividing the planting area into a plurality of homogeneous areas according to the soil moisture content and the plant status parameter at each sampling point comprises:
obtaining the soil moisture content and the plant status parameter at each location within the planting area according to locations of the sampling points within the planting area and the soil moisture content and the plant status parameter at each sampling point;
obtaining a water and fertilizer detection status at each location within the planting area according to the soil moisture content and the plant status parameter at each location within the planting area; and
obtaining the plurality of homogeneous areas formed by locations having a same water and fertilizer detection status within the planting area according to the water and fertilizer detection status at each location within the planting area;
the obtaining the plurality of homogeneous areas formed by locations having a same water and fertilizer detection status within the planting area according to the water and fertilizer detection status at each location within the planting area comprises:
arranging the water and fertilizer detection status at each location within the planting area according to a set numerical value arrangement manner to obtain a water and fertilizer feature vector at each location within the planting area;
combining locations having a same water and fertilizer feature vector within the planting area into a homogeneous subarea;
selecting a plurality of homogeneous subareas from all the homogeneous subareas as reference homogeneous subareas;
obtaining a distance between a center point of the reference homogeneous subarea and a center point of other homogeneous subarea;
combining the other homogeneous subarea and the reference homogeneous subarea of which the center points are closest to each other into the homogeneous area;
obtaining a center point of the homogeneous area;
determining whether the center point of the homogeneous area overlaps the corresponding reference homogeneous subarea;
if yes, obtaining the homogeneous area; and
if no, taking the center point of the homogeneous area as an updated reference homogeneous subarea and updating the homogeneous area; and
the obtaining the plurality of homogeneous areas formed by locations having a same water and fertilizer detection status within the planting area according to the water and fertilizer detection status at each location within the planting area further comprises:
clustering a plurality of homogeneous areas having the same water and fertilizer feature vector and discrete from one another as the same homogeneous area.