Detection algorithm of cement concrete pavement slab staggering quantity

Abstract

The invention discloses a detection algorithm of a cement concrete pavement slab staggering quantity. The detection algorithm specifically comprises the following steps of: inputting a three-dimensional image data matrix, and filtering the data; orderly taking each line of the three-dimensional image data matrix O'' after filtering, and solving the slab staggering quantity corresponding to each line in a line-by-line manner, namely solving the slab staggering quantity of the line after finding out all inflection points of the line; taking the inflection points, of which the difference of the horizontal ordinates is M, from an inflection point matrix G, and solving the difference between each two inflection points so as to obtain a height difference matrix after all the lines are processed, wherein the maximum of the height difference matrix is the slab staggering quantity corresponding to the line; solving the slab staggering quantities h1, h2,... and hm in a line-by-line manner, averaging the m slab staggering quantities, and thereby obtaining the pavement faulting quantity of the image acquisition area. The detection algorithm of the cement concrete pavement slab staggering quantity is simple in computation and short in run time, and does not need manual work. By using the surface measurement, the pavement faulting quantity can be detected by only inputting the acquired three-dimensional image data of the cement concrete pavement; and therefore, the detection algorithm is high in efficiency and accurate in detection.

Description

technical field [0001] The invention belongs to the field of road engineering, in particular to a detection algorithm for the amount of misalignment on a cement concrete road surface. Background technique [0002] The staggered amount of cement concrete pavement refers to the elevation difference between two adjacent cement slabs at the transverse joints or cracks in the cement concrete pavement. The reasons for the wrong platform mainly include the following: the base layer of the subgrade is not rolled compactly and its strength is insufficient, resulting in plastic cumulative displacement of the base layer under the action of traffic load; local foundation settlement is uneven; the load transfer capacity between adjacent slabs is reduced; Immersed in the base layer, the traffic load will cause the pavement to produce pumping phenomenon, and the moving water will throw the debris between the panel and the base layer to the rear, lift the rear board, and so on. Staggering ...

AI Technical Summary

Problems solved by technology

The manual method is realized by ruler, vernier caliper or level, which is slow, traffic interference is large, and the accuracy is low; the existence of the automatic detection method will significantly affect the characteristics of the international roughness index (IRI). There are laser profilers and ultrasonic profilers. instrument, etc., the profiler is expensive, and cannot accurately measure the wrong amount

In summary, the existing detection technology has problems such as large error, low efficiency, and high cost. It is necessary to study a high-efficiency, accurate detection algorithm for the detection of cement concrete pavement misalignment.

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