An automatic identification method for asphalt pavement crack types
A crack type, automatic identification technology, used in roads, roads, road repair and other directions, can solve problems such as poor skid resistance and structural damage
Active Publication Date: 2020-04-07
CHANGAN UNIV
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Problems solved by technology
Cracks are mainly divided into single cracks and fissures according to different appearances (larger block cracks are divided into single cracks, and smaller block cracks are divided into cracks. The present invention does not separate block cracks. Classification), due to the possibility of structural damage to cracks, and when the density is too high, the use of crack filling will lead to poor skid resistance. Generally, the cracks that can be treated by crack filling are single cracks. In order to meet the actual A technical problem that urgently needs to be solved at present is to determine the method of automatic classification of cracks suitable for the selection of joints
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Embodiment
[0075] see figure 1 , the embodiment takes the detection data of a road section of 1.6 km as an example.
[0076] 1. Screening of non-cracked road sections;
[0077] 1. Manual detection of crack information;
[0078] Manual detection is the main means of pavement condition detection. The detection personnel with certain experience judge the type of cracks on the pavement and record the position and direction of the cracks. The results of automatic classification using 3D detection data are compared.
[0079] 2. 3D crack detection data;
[0080] The present invention uses 3D laser detection data to obtain accurate crack data, randomly selects 50 unit road sections with a lane width of 3.66m and a unit length of 5m as samples, and numbers all cracks in each road section 0, 1, 2, ..., with 5m The marking line on the left side of the starting section facing the detection direction of the road section is the origin, and the coordinates of the crack point data with different num...
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The invention discloses an automatic identification method for asphalt pavement crack types. Firstly, the crack information is manually measured, and the crack data is detected through 3D, and then the directions of the crack blocks and cracks are divided into respective grid sizes, and then the unit grid is calculated. Secondly, according to the length and direction of the cracks in each row and column in the grid, the direction of the cracks is judged, and finally the distribution of cracks, transverse cracks and longitudinal cracks in each unit road section is calculated; The determination of crack direction provides a set of systematic theories, and provides a basic process for its automatic identification; at the same time, this process lays the foundation for further discussion of crack damage characteristic information and development law, and has a great impact on the crack filling and sealing road section. Scientific maintenance is of great significance and is beneficial to the further development of intelligent maintenance systems using 3D laser detection technology.
Description
technical field [0001] The invention belongs to the field of asphalt pavement disease detection and evaluation, and in particular relates to an automatic identification method for asphalt pavement crack types. Background technique [0002] Cracks, as one of the most important types of damage to asphalt pavement, are produced by the repeated action of traffic load and temperature stress, and are the main form of early damage to the pavement, almost accompanying the entire life cycle of the asphalt pavement. According to the current situation survey of highway pavement damage types in some provinces and cities in my country according to the "Highway Technical Condition Evaluation Standard", cracks often account for more than 60% of pavement damage. Structural defects such as cracks and pits will reduce the service life and increase maintenance costs. The research and analysis of the development of different characteristic cracks, timely and effective crack treatment, and the a...
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IPC IPC(8): G01N21/88
CPCE01C23/01G01N21/8851G01N2021/8854G01N2021/8887
Inventor 惠冰刘晓芳李岩梁海媚丁梦华
Owner CHANGAN UNIV