An Imaging Method for Functional Layer Defects of Ballastless Track

Abstract

The present invention relates to the technical field of non-destructive detection of pouring quality of ballastless track functional layer of high-speed railway, in particular to a defect imaging method of ballastless track functional layer, which solves the problem of inaccurate geometric size estimation and defect imaging of existing identification methods existing in the prior art Shortcomings, including the following steps: a, obtain the Burg power spectrum of the echo signal, k=100; b, calculate the ratio η of the [f2, f1] energy spectrum to the total echo energy; c, sort η in descending order, and the first 10% are Initial value, indicating that there may be defective points P i , i=1...q, and initialize i=1; d. Do a breadth search for the edge echo frequency distribution mode centered on Pi, if there is an echo frequency distribution mode, take the point to the edge area as R(P i ), otherwise the point is not recorded; e, i=i+1, such as i>q, end the search, otherwise return to d to continue the search. The invention has the characteristics of non-destructive and high precision, and is suitable for precise imaging of internal defects in the functional layer of ballastless track.

Description

A ballastless track functional layer defect imaging method technical field The present invention relates to high-speed railway ballastless track functional layer perfusion quality nondestructive testing technical field, in particular to a kind of Defect imaging method of ballastless track functional layer. Background technique High-speed railway ballastless track as a high-speed train carrier, its quality is good or bad, whether there is a defect in the interior, the defect develops The degree is directly related to the operational safety of high-speed trains. In the process of construction and operation of high-speed railways in my country, the quality and condition of ballastless track are all affected. Strictly stipulating the state of No area of ​​compact concrete surface greater than 50cm 2 bubble. At present, the quality inspection of concrete pouring of functional layer is mainly carried out by uncovering the slab. In the test, this method is time-cons...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the shortcomings of inaccurate geometric size estimation and defect imaging of existing identification methods in the prior art, and propose a defect imaging method for ballastless track functional layers

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