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Detecting method of road surface joints

A detection method and detection pile technology, applied in the direction of optical testing flaws/defects, etc., can solve problems such as low efficiency, and achieve the effect of improving accuracy and efficiency

Inactive Publication Date: 2012-10-10
ROADMAINT CO LTD
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Problems solved by technology

[0005] In view of this, the present invention is to provide a detection method for pavement joints to solve the problem of low efficiency in manually selecting images of expansion joints

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  • Detecting method of road surface joints
  • Detecting method of road surface joints
  • Detecting method of road surface joints

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Embodiment Construction

[0023] In order to clearly illustrate the solutions of the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0024] see figure 1 , embodiments of the present invention include:

[0025] S11: sequentially read the data sequence of the road surface image; wherein, each data item in the data sequence corresponds to a position on a road surface image; each data item includes the detection stake number corresponding to the position and the Elevation data for the profile of the location;

[0026] S12: Computing the first-order central difference value corresponding to each data item through the detected stake number and the elevation data;

[0027] S13: Calculate the second-order central difference value corresponding to each data item through the detected stake number and the first-order central difference value of each data item;

[0028] S14: Select a data item whose first-order central...

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Abstract

The invention discloses a detecting method of road surface joints, which comprises the steps of: sequentially reading data sequences of a road surface image; calculating a first-order central difference value corresponding to each data item through the detecting pile number and the altitude data; calculating a second-order central difference value corresponding to each data item through the detecting pile number and the first-order central difference value of each data item; selecting the data items with first-order central difference values larger than first threshold and second-order central difference values larger than a second threshold; and detecting the joints in the road surface image corresponding to the selected data item. The steps of the invention can quickly determine the images with largest expansion joint existence rate. For a large number of road surface images, the detecting method can improve the sieving efficiency of images having expansion joints, remove the road surface expansion joints in the images and improve the successive road surface damage rate detecting accuracy.

Description

technical field [0001] The invention relates to the field of pavement maintenance, in particular to a detection method for pavement joints. Background technique [0002] Before maintaining the pavement, it is necessary to detect the disease of the pavement. The current detection methods mainly take road images first, analyze the images, and then find out the location of the road where there is a disease. [0003] While using the CCD line array camera to capture the road surface image, the acquisition system will record the position of the captured image and record the detected stake number. The rut detection equipment will record the elevation data of the detected road surface and the detected pile number. The detection chainage is the distance value used to locate the detection data based on a certain reference point, and the interval between the detection chainages corresponding to the two elevation data can be in millimeters. [0004] The captured pavement images inclu...

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Application Information

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IPC IPC(8): G01N21/88
Inventor 潘玉利荣婧
Owner ROADMAINT CO LTD
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