Automatic recognition method of bituminous pavement crack type

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...

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 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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