Signal processing techniques for filtering acoustic emission data in prestressed concrete

IF 1 4区材料科学 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Research in Nondestructive Evaluation Pub Date : 2019-05-01 DOI:10.1080/09349847.2018.1426800

M. Abdelrahman, M. ElBatanouny, J. Rose, P. Ziehl

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引用次数: 5

Abstract

ABSTRACT The current state of infrastructure in the United States and worldwide has raised the need for reliable structural health monitoring techniques. Piezoelectric sensing, such as acoustic emission, has recently gained attention due to its high sensitivity and associated capability for early detection of damage. The high sensitivity of this method, however, results in the collection of data not directly related to damage growth. Current filtering procedures focus primarily on parametric analysis of the collected signals. This study focuses on developing more robust filtering techniques for acoustic emission data collected from a prestressed concrete specimen. Simulated data was generated to enable proper identification of the source of the collected signals. Filtering criteria were developed through characterization of the energy content using a wavelet transform. The developed filters were capable of separating the induced target signals from other signals with reasonable accuracy, and the results were verified through source location. The developed filters were validated using acoustic emission data collected during a load test.

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滤波预应力混凝土声发射数据的信号处理技术

基础设施在美国和世界范围内的现状提高了对可靠的结构健康监测技术的需求。压电传感，如声发射，由于其高灵敏度和相关的早期检测损伤的能力，最近受到关注。然而，这种方法的高灵敏度导致收集的数据与损伤增长没有直接关系。目前的滤波程序主要集中在采集信号的参数分析上。本研究的重点是开发更强大的滤波技术，从预应力混凝土试样收集声发射数据。生成模拟数据，以便正确识别所收集信号的来源。滤波标准是通过使用小波变换表征能量含量来开发的。所开发的滤波器能够以合理的精度将诱导目标信号从其他信号中分离出来，并通过源定位验证了结果。利用负载试验中收集的声发射数据对开发的滤波器进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Research in Nondestructive Evaluation 工程技术-材料科学：表征与测试

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Research in Nondestructive Evaluation® is the archival research journal of the American Society for Nondestructive Testing, Inc. RNDE® contains the results of original research in all areas of nondestructive evaluation (NDE). The journal covers experimental and theoretical investigations dealing with the scientific and engineering bases of NDE, its measurement and methodology, and a wide range of applications to materials and structures that relate to the entire life cycle, from manufacture to use and retirement. Illustrative topics include advances in the underlying science of acoustic, thermal, electrical, magnetic, optical and ionizing radiation techniques and their applications to NDE problems. These problems include the nondestructive characterization of a wide variety of material properties and their degradation in service, nonintrusive sensors for monitoring manufacturing and materials processes, new techniques and combinations of techniques for detecting and characterizing hidden discontinuities and distributed damage in materials, standardization concepts and quantitative approaches for advanced NDE techniques, and long-term continuous monitoring of structures and assemblies. Of particular interest is research which elucidates how to evaluate the effects of imperfect material condition, as quantified by nondestructive measurement, on the functional performance.