SAR-based GPR multi-layer steel mat parameter detecting method

A technology of parameter detection and steel mesh, which is applied in the field of SAR-based GPR multi-layer steel mesh parameter detection, can solve problems such as slow speed, and achieve the effect of improving detection efficiency, GPR image resolution and recognizability
CN108375334AActive Publication Date: 2018-08-07NANJING INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING INST OF TECH
Publication Date
2018-08-07

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Abstract

The invention provides a SAR-based GPR multi-layer steel mat parameter detecting method. The method comprises: step one, a GPR scanning image is preprocessed and noises and direct waves in the scanning image data are eliminated; step two, the GPR scanning image after preprocessing is processed b using an aperture synthesis technique, so that an offset image is obtained; and step three, steel mat parameters are extracted layer by layer from top to bottom in the offset image and a reinforcing steel bar horizontal direction interval and a reinforcing steel bar depth of each layer of steel mat areobtained. According to the invention, with the migration imaging technique, the GPR image resolution and recognizability are improved effectively. During the calculation process, the prior knowledgeis obtained easily by using the GPR detection system and thus automatic parameter extraction of the steel mat is realized, so that the detection efficiency is improved substantially.
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Description

technical field

[0001] The invention relates to the field of steel mesh quality detection, in particular to a SAR-based GPR multi-layer steel mesh parameter detection method. Background technique

[0002] Ground Penetrating Radar (GPR) originated in 1904 when the German Hulsmeyer used electromagnetic wave signals to detect underground metal objects. In 1910, Letmbach and Lowy proposed the detection of buried objects using electromagnetic waves in their patent. In 1926, Hulsenbech used pulse wave technology to detect the structure of buried media for the first time, and found that the interface of media with different dielectric constants would produce electromagnetic wave reflection, which became the basic theoretical basis for ground penetrating radar research. In 1929, Stern applied ground penetrating radar to practice to measure the thickness of glaciers. Since then, ground penetrating radar has been mainly used for deep detection. With the development and application ...

Claims

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