A system for accurate and rapid measurement of tree canopy using drones

Abstract

The present disclosure provides a system for accurately and quickly measuring the crown width of trees by using a drone, including a drone, a high-altitude reference pole, a ground level reference pole and a processor. The drone is equipped with a camera, and the high-altitude reference pole is hung by a connecting rope. Connected to the bottom of the drone, the ground level reference rod is set on the ground below the crown of the tree to be measured; using the calculated actual length between two points on the edge of any tree crown, the length of the high-altitude reference rod and the first image or The ratio of the length of the high-altitude reference pole in the second image to the length of any two points on the edge of the tree canopy can be used to obtain the first scale coefficient and the second scale coefficient, and the crown scale measured in the image can be converted to the actual crown scale by the first coefficient , convert the crown area measured in the image into the actual crown area through the second coefficient; the disclosure can accurately and efficiently measure the scale and area of ​​the crown, improve the intelligence, automation and efficiency of crown measurement, and reduce the human cost.

Description

technical field [0001] The present disclosure relates to the field of measurement and calculation of crown width of trees, in particular to a system for accurately and rapidly measuring crown width of trees by using an unmanned aerial vehicle. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In forestry investigation and garden planning, it is usually necessary to measure the crown width of trees. Accurate crown width measurement is of great significance for the investigation of forest resources, forest productivity estimation, and garden planning evaluation. Traditional canopy measurement requires the cooperation of multiple people. Use a tape measure to measure the canopy length in the east-west and north-south directions, and then calculate the canopy area by calculating the area of ​​the ellipse or the area of ​​the rectangle. The lab...

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present disclosure found that the existing methods of using UAVs to measure crown widths mostly rely on the ranging capabilities of UAVs to carry out crown width measurement work, and the quality of ranging is seriously interfered by external factors. In complex terrain conditions , the measured terrain height is not representative as a whole, so the accuracy of the crown width measurement method using UAV ranging needs to be improved; the laser measurement method is relatively fast, but its accuracy still needs to be improved

Images