Push-broom LiDAR-based soil surface morphology monitoring device and soil surface morphology monitoring and data analysis method

Abstract

A push-broom LiDAR-based soil surface morphology monitoring device disclosed by the present invention comprises a push-broom laser ranging radar, a radar carrying platform and a data processing center. The radar carrying platform is used to drive the push-broom laser ranging radar to advance along the X-axis and Y-axis directions, the push-broom laser ranging radar comprises a radar main body anda laser ranging module, and the data processing center is used to control the motion of the radar carrying platform and the motion of a driving motor, receive and process the data of the push-broom laser ranging radar. The present invention also discloses a soil surface morphology monitoring and data analysis method based on the device. The device and the method of the present invention can capture the three dimensional morphology structure of a soil surface fine, at the same time, can avoid the interference of the external light, and are more accurate in measurement result. Meanwhile, the push-broom spatial motion can effectively reduce the soil surface information missing problems caused by the shading, such as the soil surface fluctuation, the irregular cracks, etc., and compared with afixed scanning unit, the more complete soil surface information can be obtained.

Description

technical field [0001] The invention relates to a laser radar 3D imaging device, in particular to a soil surface shape monitoring device based on a push-broom LiDAR, and a soil surface shape monitoring and data analysis method, belonging to the technical field of soil research tools. Background technique [0002] In the process of changing from wet to dry, the soil will shrink due to water loss, and the surface will crack and sink; while in the process of changing from dry to wet, it will expand, resulting in the closure of cracks and the rise of the soil surface. Various deformations of the soil during the alternating process of drying and wetting will have adverse effects on agricultural production and construction projects. Severe cracking and deformation of farmland soil will damage the root system of crops, reduce the water and fertilizer absorption capacity of the root system, and affect crop yield; it will promote the evaporation of soil water, cause drought and furth...

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Problems solved by technology

However, the position of the laser head cannot be moved by this method, and the three-dimensional shape information of the soil cannot be measured [1]

Although X-ray layered scanning technology (CT technology) can realize the reconstruction of the three-dimensional space structure of the soil, the instrument is expensive, and destructive sampling is necessary, and the sample size is strictly limited【2】

In recent years, some people have used visible light imaging technology to study the deformation and cracking process of soil, but most studies can only obtain the two-dimensional shape of the soil surface, which cannot reflect the surface fluctuation and expansion, and visible light imaging is easily affected by factors such as shadows. , the application is subject to certain restrictions [3]

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