Water damage identification method based on ground penetrating radar signal time-frequency statistical characteristics

Abstract

The invention discloses a water damage identification method based on ground penetrating radar signal time-frequency statistical characteristics. The method comprises steps: 1, a sampling road sectionis subjected to GPR data acquisition, and water damage and normal data are marked separately; 2, the signals are filtered, and water damage characteristics are determined; 3, the signals are derivedas a matrix, and water damage and normal samples are combined to build a training sample set and a test sample set; 4, time-domain and frequency-domain characteristic parameters are selected and calculated; 5, distribution statistics is carried out to find out characteristics with obvious distribution characteristics as sensitive eigenvalues; 6, the sensitive eigenvalues are normalized; 7, the sensitive eigenvalues are subjected to PCA principal component analysis for dimension reduction processing; 8, a water damage classification model is built; and 9, the well-trained model is used to identify the road water damages. The problem that interpretation of ground penetrating radar signals relies on manual experience, time and labor are consumed and the subjectivity is strong can be solved; and a large amount of information can be used to evaluate water damages, the water damage identification accuracy is improved, the built water damage classification model can be used for intelligent identification on water damages on an asphalt pavement and the efficiency of pavement defect detection is improved.

Description

technical field [0001] The invention belongs to the field of asphalt road quality detection and relates to a water damage identification method based on the time-frequency statistical characteristics of ground-penetrating radar signals. Background technique [0002] Asphalt pavement has the advantages of fast construction speed, smooth and comfortable driving, and short traffic time. However, various initial damages seriously affect the use of asphalt pavement, and water damage is one of the most common and serious items. Asphalt pavement cannot be completely water-proof. When water enters the interior of the asphalt pavement structure from gaps or other paths, the adhesion of the asphalt will be reduced. Since the surface of the aggregate has a stronger adsorption force to water than to asphalt, the asphalt will be damaged under long-term contact. The peeling off from the surface of the aggregate, coupled with the influence of the traffic load, will cause water to flow, gen...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, provide a water damage identification method based on the time-frequency statistical characteristics of ground-penetrating radar signals, and solve the time-consuming and labor-intensive and highly subjective problem of relying on manual experience for the interpretation of existing ground-penetrating radar signals. question

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