Pavement crack detecting device and method based on depth and gray level images

Abstract

The invention discloses a pavement crack detecting device and method based on depth and gray level images. The pavement crack detecting device comprises a carrier platform (1), a camera shooting device (6), a line laser (7) and a calculating device (8), wherein the camera shooting device, the line laser and the calculating device are located on the carrier platform. The carrier platform (1) is used for moving in the pavement direction in the crack detecting process. The line laser (7) is used for emitting laser light perpendicular to a pavement while the carrier platform (1) moves. The camera shooting device (6) is used for continuously shooting laser lines, reflected by the pavement, of the linear laser light in a slant mode while the carrier platform (1) moves, imaging is conducted on a pavement fracture surface every time shooting is performed, and image data of the laser lines of a plurality of pavement fracture surfaces are generated. The calculating device (8) is used for generating depth data and gray level data of the corresponding pavement fracture surface according to the image data of the laser lines of each pavement fracture surface and splicing the depth data and the gray level data of each pavement fracture surface to form image data of a section of the pavement so as to conduct crack recognition.

Description

technical field [0001] This application belongs to the interdisciplinary field of surveying and mapping science and technology and instrument science, and involves image processing technology, mobile fine positioning technology and multi-sensor integration and synchronous control technology, especially relates to road surface crack detection methods and devices, which can be widely used in mobile road surveying and mapping, Road surface inspection, track inspection, tunnel inspection and other surveying and transportation fields. Background technique [0002] During the use of highways, affected by many factors such as the natural environment and driving loads, various damages are gradually formed on the surface of the highway. Cracks, as a common form of damage to the road surface, are extremely harmful to the highway. In order to save maintenance resources and ensure the safety and comfort of driving, it is necessary to accurately obtain parameter information such as the l...

AI Technical Summary

Problems solved by technology

In view of this, the present invention focuses on the three-dimensional detection method of cracks, directly obtains the three-dimensional information of the road surface, and uses a high-power collimated laser to provide illumination for the section generated by the cracks in the road. The illumination range is concentrated, and the uneven illumination is effectively solved. and shadow problems; under the control of the photoelectric encoder, the identification interval of the road profile can be within 1mm, which greatly improves the identification and detection effect of tiny cracks

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