A method for automatic detection of cracks in concrete members

Abstract

The invention discloses an automatic detection method for cracks of a concrete member. The automatic detection method comprises the following steps: S1, obtaining a plurality of pieces of crack images of the concrete member; S2, carrying out recognition processing on the crack images by adopting a mathematic morphologic method through top-hat transform according to linearization and dark target characteristics of the cracks, so as to obtain new crack images containing crack information and non-crack information; S3, rapidly positioning and matching positions of the cracks in the processed crack images by adopting a stratification matching method based on an image Gaussian pyramid; synthesizing the processed adjacent crack images according to the positions of the cracks in sequence to obtain adjacent crack image synthetic images, and synthesizing until a crack distribution map of the concrete member, which contains all the crack information, is obtained; and S4, automatically generating a crack detection report of the concrete member according to physical parameters of the cracks in the crack distribution map. According to the automatic detection method disclosed by the invention, the detection efficiency and the detection speed are improved, and manual risks and detection errors are reduced; and crack appearance characteristics on the surface of the concrete member can be rapidly and completely displayed again.

Description

technical field

[0001] The invention relates to the technical field of concrete crack image processing, in particular to an automatic detection method for concrete component cracks. Background technique

[0002] Cracks are a common appearance quality defect in buildings. In housing construction, there are still a large number of surface cracks in old and new concrete structures, and it is temporarily difficult to completely eliminate them, especially when various factors such as the shrinkage stress of high-strength concrete, the temperature stress of super-long structures, and the structural stress of components act alone or together. Various forms of cracks of different degrees will appear in the beams, slabs, and wall components of the building, and the appearance characteristics of the crack distribution, such as the shape, length, width, and location, play a particularly important role in judging the cause of cracks and the degree of damage. role. Therefore, it is nec...

Examples

Embodiment 1

[0089] A building is located in a community in Guanshan, Wuchang District, Wuhan City. It is a four-story frame structure building with a designed building area of ​​about 12,000m2 2 , The construction of the building was shut down due to various reasons. In the inspection of the project resumption, the system was used to identify and deal with some cracks, and achieved good results.

[0090] VC++ programming is used to build image input, crack recognition and sequence image mosaic function modules to realize the computer control system, automatically and quickly generate crack distribution maps and inspection reports of concrete components, and retain the original crack images.

[0091] Figure 4 It is a schematic diagram of the distribution of cracks in the unfinished image mosaic of the embodiment of the present invention;

[0092] Figure 5 It is a schematic diagram of the distribution of cracks after image mosaic in the embodiment of the present invention.

technical field

[0001] The invention relates to the technical field of concrete crack image processing, in particular to an automatic detection method for concrete component cracks. Background technique

[0002] Cracks are a common appearance quality defect in buildings. In housing construction, there are still a large number of surface cracks in old and new concrete structures, and it is temporarily difficult to completely eliminate them, especially when various factors such as the shrinkage stress of high-strength concrete, the temperature stress of super-long structures, and the structural stress of components act alone or together. Various forms of cracks of different degrees will appear in the beams, slabs, and wall components of the building, and the appearance characteristics of the crack distribution, such as the shape, length, width, and location, play a particularly important role in judging the cause of cracks and the degree of damage. role. Therefore, it is nec...

Examples

Embodiment 1

[0089] A building is located in a community in Guanshan, Wuchang District, Wuhan City. It is a four-story frame structure building with a designed building area of ​​about 12,000m2 2 , The construction of the building was shut down due to various reasons. In the inspection of the project resumption, the system was used to identify and deal with some cracks, and achieved good results.

[0090] VC++ programming is used to build image input, crack recognition and sequence image mosaic function modules to realize the computer control system, automatically and quickly generate crack distribution maps and inspection reports of concrete components, and retain the original crack images.

[0091] Figure 4 It is a schematic diagram of the distribution of cracks in the unfinished image mosaic of the embodiment of the present invention;

[0092] Figure 5 It is a schematic diagram of the distribution of cracks after image mosaic in the embodiment of the present invention.

Images