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Ground penetrating radar-based pavement crack depth nondestructive test method

A road surface crack and ground penetrating radar technology, which is applied in radio wave measurement systems, measurement devices, and radio wave reflection/re-radiation, etc., can solve problems such as inability to select electromagnetic waves and inability to measure the depth of road cracks

Active Publication Date: 2011-04-13
ROADMAINT CO LTD
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Problems solved by technology

[0005] In view of this, the present invention is to provide a non-destructive detection method for the depth of cracks in the road surface based on ground penetrating radar, so as to solve the problem that the above-mentioned road layers with different crack depths will reflect back electromagnetic waves during the measurement process, and the GPR equipment cannot select the deepest layer. Electromagnetic waves, there is a problem that the effective cracking depth of the pavement cannot be measured

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  • Ground penetrating radar-based pavement crack depth nondestructive test method
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  • Ground penetrating radar-based pavement crack depth nondestructive test method

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Embodiment Construction

[0031] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0032] The method of the present invention can be applied in GPR equipment, and during the running of the vehicle, electromagnetic waves are continuously emitted to the ground, and the electromagnetic waves are received for analysis, so as to calculate the cracking depth of the road surface.

[0033] see figure 1 , figure 1 Is the method flowchart of embodiment, comprises the following steps:

[0034] S11: Transmit electromagnetic waves to the road surface according to the predetermined sampling interval S and transmission frequency.

[0035] The sampling interval S can be calculated by the following formula:

[0036] ξ = S 2 sin ( arctan S ...

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Abstract

The invention discloses a ground penetrating radar-based pavement crack depth nondestructive test method. The method comprises the following steps of: emitting electromagnetic waves to a pavement crack according to a sampling interval S and an emission frequency; selecting the amplitudes of the electromagnetic waves corresponding to a material on the bottommost part of the crack from received reflected electromagnetic waves according to the amplitudes of the electromagnetic waves reflected from each layer of materials in the pavement crack; filtering the corresponding electromagnetic waves from each received reflected electromagnetic wave according to the selected amplitudes of the electromagnetic waves; and operating the pavement crack depth by using travel time of the filtered electromagnetic waves and dielectric constants of each layer of pavement materials. The electromagnetic waves which are reflected back from the deepest place are extracted through reflection waves at different depths of the crack so as to effectively measure the pavement crack depth.

Description

technical field [0001] The invention relates to the technical field of road engineering detection, in particular to a ground-penetrating radar-based non-destructive detection method for crack depth on a road surface. Background technique [0002] At present, the method of manual investigation combined with drilling and coring is mainly used in the detection of crack depth and diagnosis of disease causes in highway pavement in my country. This method requires a certain degree of damage to the road surface, which is inefficient, and is a small-sample test with poor representativeness. [0003] Ground Penetrating Radar (GPR) testing technology is a method to detect the distribution shape and characteristics of underground targets by using the propagation law of high-frequency electromagnetic pulse waves in different electromagnetic media. It is continuous, efficient, accurate and non-destructive , rich information and other advantages. [0004] In recent years, GPR technology...

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Application Information

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IPC IPC(8): G01B15/00G01S13/02
Inventor 李强潘玉利刘刚
Owner ROADMAINT CO LTD
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