A device and method for real-time online evaluation of soil structure evolution based on UAV

Abstract

The invention discloses a device and method for estimating soil structural evolution online in real time based on an unmanned aerial vehicle; the device comprises the unmanned aerial vehicle, a telescopic device, a micro-distance video and image acquisition device, a first signal receiver, a second signal receiver, and a remote control computer; the method comprises: first, establishing a micro-distance video gray image database; second, establishing in the database, a correspondence between substances and a gray value range; third, calculating in the micro-distance video gray image, a number of pixels representative of the substances in the gray value range, and establishing a relation with corresponding substance contents or forms; fourth, determining actual characteristic parameters of a soil body to be detected according to the above relation so as to determine development state of the soil body. Micro-distance video estimation is performed on a soil sample in situ, testing precision is high, and soil body composition and its evolution identification are more accurate; it is possible to perform large-range long-term continuous real-time online monitoring for a soil body where a human body and an axle-driven vehicle cannot reach easily, and evolution law of the soil body in the area is obtained.

Description

technical field [0001] The invention belongs to the technical field of soil evolution monitoring, and in particular relates to a method and device for real-time on-line evaluation of macroscopic video images carried by drones for soil structure evolution. Background technique [0002] At present, the monitoring of soil microstructure evolution mainly adopts the field test method mainly based on manual measurement, but this method has low efficiency, low precision, and large manual errors. Because this method needs to transport the soil sample from the field back to the laboratory for testing; on the one hand, after the soil sample is taken out from the ground, the stress acting on it will change; on the other hand, the soil sample During transportation, the properties of the soil will change; these reasons will lead to inaccurate final test results. Moreover, in many special scenes and areas (such as severe chemical pollution, high temperature, swamps, some slopes, etc.), i...

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Problems solved by technology

[0004] However, when the existing image acquisition equipment shoots macro video images, it is easily affected by natural conditions (such as rain, snow, haze, dust, sunlight intensity and electromagnetic interference, etc.), resulting in the sharpness of the captured macro video images. and poorer resolution

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