一种基于球体发射和压电薄膜的无损检测方法。

A Proposed Non-Destructive Method Based on Sphere Launching and Piezoelectric Diaphragm.

作者信息

Junior Cristiano Soares, Aguiar Paulo Roberto, D'Addona Doriana M, Junior Pedro Oliveira Conceição, Junior Reinaldo Götz Oliveira

机构信息

Department of Electrical Engineering, São Paulo State University (UNESP), Av. Eng. Luiz Edmundo C. Coube 14-01, Bauru 17033-360, Brazil.

Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80138 Napoli, Italy.

出版信息

Sensors (Basel). 2024 Sep 10;24(18):5874. doi: 10.3390/s24185874.

DOI:10.3390/s24185874

PMID:39338618

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11435459/

Abstract

This work presents the study of a reproducible acoustic emission method based on the launching of a metallic sphere and low-cost piezoelectric diaphragm. For this purpose, tests were first conducted on a carbon fiber-reinforced polymer structure, and then on an aluminum structure for comparative analysis. The pencil-lead break (PLB) tests were also conducted for comparisons with the proposed method. Different launching heights and elastic deformations of the structures were investigated. The results show higher repeatability for the sphere impact method, as the PLB is more affected by human inaccuracy, and it was also effective in damage detection.

摘要

这项工作介绍了一种基于金属球发射和低成本压电膜片的可重复声发射方法的研究。为此，首先在碳纤维增强聚合物结构上进行测试，然后在铝结构上进行测试以进行对比分析。还进行了铅笔芯折断（PLB）测试以与所提出的方法进行比较。研究了结构的不同发射高度和弹性变形。结果表明，球体冲击法具有更高的重复性，因为PLB受人为误差的影响更大，并且它在损伤检测中也很有效。