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An Adaptive Selection Method of Ground Penetrating Radar Maps for Water Damage Detection

A ground penetrating radar, water damage technology, applied in the direction of measuring devices, using re-radiation, radio wave measurement systems, etc., can solve the problems of relying on manual selection, etc., and achieve the effect of improving intelligence and recognition accuracy

Active Publication Date: 2021-08-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the deficiencies and defects of the above-mentioned prior art, the purpose of the present invention is to provide a ground penetrating radar map adaptive selection method for water damage detection, to solve the problem of relying on manual selection of suitable contrast GPR map based on GPR map in the prior art. question

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  • An Adaptive Selection Method of Ground Penetrating Radar Maps for Water Damage Detection
  • An Adaptive Selection Method of Ground Penetrating Radar Maps for Water Damage Detection
  • An Adaptive Selection Method of Ground Penetrating Radar Maps for Water Damage Detection

Examples

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Embodiment 1

[0086] This embodiment provides a kind of asphalt pavement water damage detection method, such as Figure 1 to Figure 3 shown, follow the steps below:

[0087] Step 1: Obtain the water damage atlas dataset through the GPR pavement survey:

[0088] Step S11, GPR pavement survey and data collection: use the GPR system to collect on-site data on the asphalt pavement, and during the process of on-site data collection, determine the damaged area of ​​the pavement where there is bleeding or whitening;

[0089] In step S11, during the on-site data collection process, the sampling parameters require that the sampling distance be 1.6 GHz, and the sampling frequency be 10 to 20 times the main frequency of the antenna.

[0090] These markers will appear as small squares above the GPR map, such as figure 2 The mark "□" in the radar map in the middle corresponds to the water damage defect area, and the GPR map corresponding to these marks is used as the true value of water damage to det...

Embodiment 2

[0148] This embodiment provides a method for adaptive selection of ground penetrating radar maps for water damage detection, such as Figure 9 As shown, the method adaptively selects the ground penetrating radar map according to the contrast of the ground penetrating radar map, and the method is carried out according to the following steps:

[0149] Step 1, read the preprocessed GPR data:

[0150] After preprocessing the GPR data, randomly generate radar atlases with different contrasts within the set contrast value range, and construct an initial random atlas dataset. The size of the initial random atlas dataset is N pictures, and the initial random atlas The map data set is used to determine whether it contains the target;

[0151] The method for obtaining the GPR data is as follows: using the GPR system to collect on-site data on the asphalt pavement, during the process of on-site data collection, determine the damage area where the road surface appears whitish or whitish,...

Embodiment 3

[0217] This example presents a water damage detection method for asphalt pavement based on the adaptive selection of the map gray scale, such as Figure 1 to Figure 17 As shown, this method is basically the same as the asphalt pavement water damage detection method in Example 1, the only difference is that in step S12, "set the contrast of the GPR spectrum and intercept the GPR spectrum according to the length of 5-6m" is replaced by "choose a suitable Contrast GPR spectrum and intercept the GPR spectrum according to the length of 5-6m".

[0218] The method adopted in the selection of the GPR spectrum of suitable contrast is the ground-penetrating radar spectrum adaptive selection method;

[0219] The adaptive selection method of the ground penetrating radar spectrum is the same as the water damage detection method for asphalt pavement described in Embodiment 2 for water damage detection.

[0220] The recognition models described in Embodiment 1 and Embodiment 2 are the same ...

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Abstract

The invention provides a method for adaptively selecting ground-penetrating radar atlases for water damage detection. The method adaptively selects ground-penetrating radar atlases according to the contrast of ground-penetrating radar atlases. The method is carried out in accordance with the following steps: Step 1, read Preprocessed GPR data; step 2, image resolution adjustment; step 3, input the data set to the recognition model; step 4, output water damage results; step 5, use the initial random map data set to detect the presence or absence of targets Judgment; step 6, incremental random generation of atlas, and the selection of suitable contrast atlas; the recognition algorithm of the present invention is combined with a deep learning model (or image classification model), which can effectively, quickly and automatically find a suitable B-scan Atlas, realize automatic identification and detection based on GPR atlas, and improve recognition accuracy at the same time.

Description

technical field [0001] The invention belongs to the field of automatic detection, relates to a ground-penetrating radar spectrum, in particular to an adaptive selection method of a ground-penetrating radar spectrum for water damage detection. Background technique [0002] Ground Penetrating Radar (GPR) is an instrument that uses radar pulse waves to detect and image conditions below the surface. Its principle is to use antennas to transmit and receive high-frequency electromagnetic waves to detect the material properties of the medium. GPR uses high-frequency and usually polarized radio waves to transmit waves below the surface. When the electromagnetic waves hit objects buried under the surface or reach the boundary of dielectric constant changes, the reflected waves received by the antenna will be recorded. The signal difference of the reflected echo. Due to the high precision, high efficiency and non-destructive characteristics of ground penetrating radar detection, GPR ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/88G01S13/89G01S7/41
CPCG01S13/885G01S13/89G01S7/41G01S7/417G01S7/418
Inventor 张军陶君
Owner CHANGAN UNIV
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