Method for determining soil moisture on basis of thermal pulse

Abstract

The invention discloses a method for determining soil moisture on the basis of thermal pulse. The method comprises the following steps: Step 1, preparing a soil sample; Step 2, determining the moisture content of the air-dried soil sample; Step 3, preparing a calibration soil sample; Step 4, calculating the weight of dry soil in each cylinder; Step 5, mounting a soil moisture sensor; Step 6, confirming the thermal diffusion time corresponding to the moisture content of the calibration soil sample which is not watered; Step 7, confirming the thermal diffusion time corresponding to different moisture contents of the watered calibration soil sample; Step 8, fitting the function relation between the moisture content of the calibration soil sample and the thermal diffusion time; Step 9, determining the soil moisture of the field to be determined. The method of the invention for determining the soil moisture on the basis of thermal pulse has the advantages of simple principle, high accuracy, easy operation and small destroy; the method with the function of continuous multipoint positioning or mobile determination is not subject to the internal media of the soil, therefore, the application range is wide; the method is free from electromagnetic radiation, thereby causing no harm to human bodies.

Description

technical field [0001] The invention is a method for measuring soil water content by heat pulse and heat diffusion principle. Background technique [0002] Soil moisture content is one of the basic data needed for scientific research in agricultural water and soil engineering, irrigation and drainage science, crop cultivation, hydrology, soil science and many other disciplines. Therefore, accurate determination of soil water content is of great significance for research in the above-mentioned fields and related fields. The existing soil water content measurement methods are mainly two methods of electromagnetic wave and electromagnetic radiation. These two methods are relatively complicated, greatly affected by the internal medium of the soil, and have large measurement errors. The damage to the soil is relatively large, and manual on-site operation is required when measuring, which is time-consuming, labor-intensive, and labor-intensive, which is very troublesome. The str...

AI Technical Summary

Problems solved by technology

The existing soil water content measurement methods are mainly two methods of electromagnetic wave and electromagnetic radiation. These two methods are relatively complicated, are greatly affected by the internal medium of the soil, have large measurement errors, and require pre-embedded measuring tubes or digging soil profiles. The damage to the soil is relatively large, and manual on-site operation is required when measuring, which is time-consuming, laborious, and labor-intensive, which is very troublesome

The strong radiation emitted by electromagnetic radiation instruments will have adverse effects on human health, and it cannot be automatically and continuously measured at multiple points, so the number of its use is gradually decreasing

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