CN-121994721-A - Soil profile property identification method and system based on spectrum analysis

Abstract

The invention belongs to the technical field of soil identification, and particularly relates to a soil profile property identification method and system based on spectrum analysis. The method comprises the steps of acquiring spectrum data of a target soil profile sampling point, identifying one or more difference change points based on analysis of the spectrum data, and judging the profile property of the soil profile as an interrupted profile or a continuous profile based on the number and distribution of the one or more difference change points. The invention enhances the reliability of analysis input by screening and sorting influence factors, converts section type judgment into objective quantitative analysis on the difference change points so as to improve the identification accuracy, and can locate the break points of the structure in the continuous section, thereby realizing the accurate depiction of the internal structure of the section and improving the fineness of the identification result.

Inventors

• ZHU ZIGANG
• DANG FENGLING

Assignees

• 中筑乾坤(北京)生态科技有限公司

Dates

Publication Date

20260508

Application Date

20260225

Claims (10)

1. 1. The soil profile property identification method based on spectrum analysis is characterized by comprising the following steps of acquiring spectrum data of a target soil profile sampling point; Determining a profile property of the soil profile as an interrupted profile or a continuous profile based on the number and distribution of the one or more differential change points, and if the profile property is determined to be a continuous profile, identifying one or more structural break points and corresponding continuous intervals within the continuous profile, and outputting the structural break points and the continuous intervals; Wherein identifying one or more discrepancy change points based on analysis of the spectral data comprises, for data points within the structural data extracted from the spectral data, calculating a discrepancy fluctuating value for each data point by comparing the value of that data point with the values of its neighboring data points within the sliding analysis window, and determining the corresponding data point as the discrepancy change point if the discrepancy fluctuating value exceeds a preset reference threshold value.
2. 2. The method for identifying soil profile properties based on spectroscopic analysis as claimed in claim 1, wherein before identifying one or more differential change points based on analysis of the spectroscopic data, the method further comprises correlating the spectroscopic data with soil property parameters obtained from the sampling points; And generating impact factor ranking information by determining a ranking level for each impact factor, wherein analysis of the spectral data is performed based on the impact factor ranking information.
3. 3. The method for identifying soil profile properties based on spectral analysis according to claim 2, wherein generating the influence factor ranking information by determining the ranking level of each influence factor comprises performing a rechecking process on the local parameters corresponding to the influence factors to obtain a fitting total; The method comprises the steps of comparing the fitting total amount with a preset judging total amount, screening influence factors after rechecking from the influence factors based on a comparison result, and determining the ranking level by determining the matching degree of each influence factor in the influence factors after rechecking.
4. 4. The method of claim 1, wherein determining the profile property of the soil profile as an interrupted profile or a continuous profile based on the number and distribution of one or more differential change points comprises: If the interval lengths between any two adjacent differential change points are equal, the soil profile is determined to be a continuous profile, and if at least two adjacent differential change points exist, the interval lengths between the adjacent differential change points are not equal, the soil profile is determined to be an interrupted profile.
5. 5. The method of identifying soil profile properties based on spectroscopic analysis of claim 1, wherein identifying one or more structure break points within the continuous profile comprises performing a difference assessment on the continuous profile to output one or more candidate structure break points; And if a plurality of candidate structure break points are output, selecting the candidate structure break point with the largest relative deviation characteristic as the structure break point.
6. 6. A soil profile property identification system based on spectral analysis, comprising the following modules: The spectrum data acquisition module is configured to acquire spectrum data of a target soil profile sampling point; A profile property determination module configured to identify one or more differential change points based on analysis of the spectral data in response to the spectral data acquired by the spectral data acquisition module and determine a profile property of the soil profile as an interrupted profile or a continuous profile based on the number and distribution of the one or more differential change points; And the structure break point identification module is configured to identify one or more structure break points and corresponding continuous sections in the continuous section and output the structure break points and the continuous sections in response to the determination result of the section property determination module determining the section property as the continuous section.
7. 7. The system for identifying soil profile properties based on spectral analysis of claim 6, further comprising an impact factor analysis module configured to correlate spectral data with soil property parameters obtained from the sampling points, identify impact factors associated with changes in the soil property parameters, and generate impact factor ranking information; Wherein the profile property determination module is configured to perform an analysis of the spectral data based on the impact factor ordering information.
8. 8. The spectroscopic analysis-based soil profile property identification system of claim 6, wherein identifying one or more points of differential change based on analysis of the spectroscopic data comprises calculating, for data points within the structural data extracted from the spectroscopic data, a deviation fluctuation value for each data point by comparing the value of that data point with the values of its neighboring data points within the sliding analysis window; and if the deviation fluctuation value exceeds the preset reference threshold value, determining the corresponding data point as a difference change point.
9. 9. The spectroscopic analysis-based soil profile property identification system of claim 6, wherein one or more structure break points within the continuous profile are identified, wherein a difference evaluation is performed on the continuous profile to output one or more candidate structure break points, and wherein if a plurality of candidate structure break points are output, the candidate structure break point having the greatest relative deviation characteristic is determined as the structure break point.
10. 10. The system for identifying soil profile properties based on spectral analysis according to claim 7, wherein the generating of the influence factor ranking information comprises performing a rechecking process on the local parameters corresponding to the influence factors to obtain a fitted total amount; and determining the ranking level by determining the matching degree of each influence factor in the influence factors after rechecking.

Description

Soil profile property identification method and system based on spectrum analysis Technical Field The invention belongs to the technical field of soil identification, and particularly relates to a soil profile property identification method and system based on spectrum analysis. Background The soil profile is used as a window for revealing the characteristics of the rock and soil layers below the ground surface, and is a foundation in the fields of agricultural production, geological exploration, civil engineering and the like, and the soil planing surface is classified, geological disasters are predicted and engineering construction is planned according to the physical properties of the structure, the texture, the color and the like of the soil profile. The prior art has a plurality of defects in the aspect of soil profile structure identification, such as the traditional identification method relies on field visual observation and manual identification of professionals, and the identification result lacks uniformity due to identification standards and experience differences of different personnel when the soil profile is identified, when the traditional automatic analysis technology is adopted, a relatively primary identification model is generally adopted, the structure level is divided according to the grading mechanism of the data change amplitude, but the method can only be effective on the soil profile with distinct level and obvious property difference, and the accuracy rate is reduced when the soil profile is identified on a transition profile with more gradually changed property in nature, so that the problem of missed identification or misidentification is caused. In view of the above, the invention provides a soil profile property identification method and system based on spectrum analysis. Disclosure of Invention The invention aims to provide a soil profile property identification method and system based on spectrum analysis, which solve the technical problems that in the prior art, the grading and classification are carried out depending on the structural deviation of a soil profile, and the condition that the profile property change is slower can not be accurately judged. In order to achieve the aim, the invention adopts the following technical scheme that the soil profile property identification method based on spectrum analysis comprises the following steps of acquiring spectrum data of a target soil profile sampling point; identifying one or more discrepancy change points based on the analysis of the spectral data; Determining a profile property of the soil profile as an interrupted profile or a continuous profile based on the number and distribution of the one or more differential change points, and if the profile property is determined to be a continuous profile, identifying one or more structural break points and corresponding continuous intervals within the continuous profile, and outputting the structural break points and the continuous intervals; Wherein identifying one or more discrepancy change points based on analysis of the spectral data comprises, for data points within the structural data extracted from the spectral data, calculating a discrepancy fluctuating value for each data point by comparing the value of that data point with the values of its neighboring data points within the sliding analysis window, and determining the corresponding data point as the discrepancy change point if the discrepancy fluctuating value exceeds a preset reference threshold value. Preferably, before identifying the one or more differential change points based on the analysis of the spectral data, the method further comprises correlating the spectral data with soil property parameters obtained from the sampling points; And generating impact factor ranking information by determining a ranking level for each impact factor, wherein analysis of the spectral data is performed based on the impact factor ranking information. Preferably, generating the influence factor ranking information by determining the ranking level of each influence factor comprises performing rechecking processing on local parameters corresponding to the influence factors to obtain a fitting total; The method comprises the steps of comparing the fitting total amount with a preset judging total amount, screening influence factors after rechecking from the influence factors based on a comparison result, and determining the ranking level by determining the matching degree of each influence factor in the influence factors after rechecking. Preferably, determining the profile property of the soil profile as an interrupted profile or a continuous profile based on the number and distribution of the one or more differential change points comprises: If the interval lengths between any two adjacent differential change points are equal, the soil profile is determined to be a continuous profile, and if at least two adjacent differential change