Measuring method for construction depth of asphalt road surface

Abstract

The invention discloses a measuring method for the construction depth of an asphalt road surface, comprising the following steps of: starting a computer, a UPS (Uninterrupted Power Supply), a laser device, an encoder and a camera; calibrating the camera; pushing a handcart to move forwards on a road surface to be detected; sending a pulse signal to the computer by the encoder; emitting laser beams by the laser device; receiving a triggering signal sent by the computer, collecting images and sending the images to the computer; sequentially carrying out image de-noising on each image received by the computer and carrying out mass center extraction row by row through a threshold value gravity center method; subtracting a coordinate value of a mass center of each row by a height coordinate value corresponding to a reference standard surface corresponding to the image to obtain a difference value; and calculating a height value of each row in each image by a formula 1 and calculating an arithmetic mean value of all the obtained height values to obtain the construction depth of the asphalt road surface. The measuring method improves the measuring precision of the construction depth and has the advantages of simplicity and flexibility in operation and convenience for calculation.

Description

technical field [0001] The invention belongs to the technical field of measuring structure depth, and relates to a method for measuring the structure depth of asphalt pavement. Background technique [0002] With the continuous development of traffic and the continuous improvement of road grades, asphalt pavement has been used more and more. However, with the increase of traffic volume and the continuous improvement of vehicle speed, traffic accidents continue to occur, which makes the anti-skid problem of the road surface increasingly prominent. The occurrence of traffic accidents has a great relationship with the anti-skid performance of the pavement, and there is a good correlation between the average texture of the pavement and the depth of the pavement section structure, and the asphalt pavement with a larger surface structure depth can provide higher frictional resistance , especially in the case of accumulated water or ice and snow, if the anti-skid performance of the...

AI Technical Summary

Problems solved by technology

Among them, the artificial sand topping method is inefficient, and the test structure is subject to many factors of human interference, the reproducibility is poor, and it is not easy to measure in wet weather. For highways with long mileage, only certain sections of the road can be selected for sampling survey, which reduces the test results. Evaluation of the pavement structure depth of the entire road section; the digital image detection method is greatly affected by the light intensity and light angle of the external environment, and the image processing algorithm needs to be further improved; the results obtained by the laser rangefinder are discontinuous and cannot Truly reproduce the microscopic texture features of the road surface, so the error is large

In summary, the existing detection technology has problems such as large errors and low efficiency. It is very necessary to study a depth detection device for asphalt pavement structure with high degree of automation, convenient operation, high efficiency and accurate detection.

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