Automatic recognition method of bituminous pavement crack type

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: 2018-06-15
CHANGAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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 densi...

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  • Automatic recognition method of bituminous pavement crack type
  • Automatic recognition method of bituminous pavement crack type
  • Automatic recognition method of bituminous pavement crack type

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses an automatic recognition method of a bituminous pavement crack type. Firstly, crack information is artificially measured, crack data are obtained through 3D detection, after chap blocks and crack directions are divided into respective mesh sizes, characteristic indexes of unit meshes are calculated, secondly, the direction of each crack is determined according to the sum ofthe crack lengths in each row and each line in the meshes, and finally distribution of chaps, transverse joints and longitudinal joints in each unit road segment are calculated. A set of systematizedtheories are provided for determination of the chap degree and judgment and determination of the crack directions through a specific quantization method, and a basic procedure is provided for automatic recognition of the crack type; and meanwhile, the procedure lays a foundation for further discussion of crack failure characteristic information and the development law and has great significance in scientific maintenance of a joint filling and sealing road segment, and development of an intelligent maintenance system through the three-dimensional laser detection technology is further facilitated.

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...

Claims

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Application Information

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IPC IPC(8): E01C23/01G01N21/88
CPCE01C23/01G01N21/8851G01N2021/8854G01N2021/8887
Inventor 惠冰刘晓芳李岩梁海媚丁梦华
Owner CHANGAN UNIV
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