Monitoring method for corrosive damage of hole edge of aluminum alloy porous structure

Abstract

The invention provides a monitoring method for corrosive damage of the hole edge of an aluminum alloy porous structure based on an iterative algebraic reconstruction algorithm. The monitoring method comprises the following steps: firstly, selecting a porous aluminum alloy, and arranging piezoelectric sensors by a square array layout; secondly, adopting a sine wave exciting signal; thirdly, imaging the damage by applying a tomography scanning algorithm of ART according to the network layout of the piezoelectric sensors and selected signal characteristic quantity; fourthly, carrying out location imaging on the damage by analyzing a correlation coefficient of Lamb waves; fifthly, adopting mean filtering processing, and solving a value of a final pixel by using a mean of a template to replace a value of an original pixel. According to the monitoring method disclosed by the invention, by performing the steps, different piezoelectric sensors are acquired by layout optimization of the piezoelectric sensors and signal monitoring; characteristic parameters are extracted by signal processing, the corrosive damage degree of a porous aluminum alloy member can be quantitatively characterized, and the function of monitoring the corrosive damage of the aluminum alloy structure in real time can be realized.

Description

technical field [0001] The invention provides a method for monitoring corrosion damage at the edge of a hole in an aluminum alloy porous structure, which relates to a method for monitoring corrosion damage at the edge of a hole in an aluminum alloy porous structure based on an algebraic iterative reconstruction algorithm, in particular to a method based on an algebraic iterative reconstruction algorithm (ART) The invention discloses a method for monitoring corrosion damage of an aluminum alloy porous structure, belonging to the technical field of structural health monitoring. Background technique [0002] Structural health monitoring technology comprehensively uses sensor technology, signal processing and analysis technology to monitor the actual situation of the structure in real time, providing an important reference for the safety, reliability and durability of large-scale critical structures. Nondestructive testing based on Lamb waves has a wide range of applications due...

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Problems solved by technology

[0004] Aiming at the problem that it is difficult to effectively monitor the corrosion damage of the hole edge of the porous aluminum alloy structure in real time, this patent proposes a method for monitoring the corrosion damage of the hole edge of the porous aluminum alloy structure based on the algebraic iterative reconstruction algorithm, that is, the porous aluminum structure hole based on tomography Edge Corrosion Damage Monitoring Method

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