Non-destructive determination method of soil water content and saturation based on color and ultrasonic technology

By employing a non-destructive testing method based on color and ultrasonic technology, combined with image processing and acoustic detection, the destructive and accuracy issues of soil moisture content and saturation measurement have been resolved, achieving rapid and accurate non-destructive testing applicable to various environmental conditions.

CN117078657BActive Publication Date: 2026-07-10CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202311162430.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-11
Publication Date
2026-07-10
Estimated Expiration
2043-09-11

AI Technical Summary

Technical Problem

Existing technologies for determining soil moisture content and saturation suffer from problems such as damaging the soil, being time-consuming, having low accuracy, and being susceptible to environmental influences, making it difficult to achieve non-destructive, rapid, and accurate measurements.

Method used

A non-destructive testing method based on color and ultrasonic technology was adopted. By taking soil photographs, image preprocessing was performed to obtain the fractal dimension, and the relationship between fitting parameters and water content was established. The porosity was determined by combining acoustic detection to indirectly determine the saturation. The gamma correction method was used to eliminate the influence of light.

Benefits of technology

It achieves high-precision, rapid, and non-destructive determination of soil moisture content and saturation, has strong applicability, is suitable for different indoor and outdoor environments, reduces manpower consumption, and improves on-site testing efficiency and accuracy.

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Abstract

The application discloses a kind of soil water content and saturation nondestructive determination method based on color and ultrasonic technology, soil water content determination method: photograph soil, carry out image preprocessing, obtain the R, G, B diagram of soil photo;Obtain the effective fractal dimension in image, obtain the discrete probability distribution diagram of fractal dimension;Establish the relationship between fitting parameter W, S and K and each fractal dimension of R, G, B level in soil image;With fitting parameter W, S and K as independent variable, with measured soil water content as dependent variable, linear regression analysis is carried out using least square method, and the estimation model of soil water content is established.Saturation determination method: the soil to be measured is detected by acoustic detector to obtain the soil porosity ratio e, and the saturation is calculated based on the porosity ratio e, the specific gravity of soil particles and the measured water content.The application has the characteristics of high precision, clear physical meaning of model parameters, strong applicability, fast testing speed and simple operation.
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