caa a22 4500 606173021 CHVBK 20210128100731.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10921-015-0311-y doi (NATIONALLICENCE)springer-10.1007/s10921-015-0311-y A Comparison Between Time-of-Arrival and Novel Phased Array Approaches to Estimate Acoustic Emission Source Locations in a Steel Plate [Elektronische Daten] [Lassaad Mhamdi, Thomas Schumacher] An important step in quantitative acoustic emission (AE) monitoring is the estimation of the temporal and spatial coordinates of the source. In this paper, we describe and compare two AE source location approaches: traditional time of arrival and a novel circular phased array. Both of these approaches have their strengths and limitations depending on the application. The novelty of our phased array approach is that we employ two circular arrays, which enables us to estimate the location rather than only the direction of the source, a limitation of traditional phased array approaches that only use one array. Results of laboratory experiments performed on a steel plate according to ASTM E647 using novel multi-sensor sheets to record the AE signals are presented and discussed for both approaches. Each sheet was equipped with a dense array of piezoelectric discs laminated on a polyimide substrate. The sheets were mounted on one side of the steel plate and pencil lead breaks applied to the other side representing artificial sources of AE. The results are presented and discussed and a comparison between the performances of the two approaches is provided. Springer Science+Business Media New York, 2015 Acoustic emission nationallicence Source location estimate nationallicence Circular phased array nationallicence Piezoelectric nationallicence Multi-sensor sheet nationallicence Pencil lead break nationallicence Mhamdi Lassaad Civil and Environmental Engineering, University of Delaware, Newark, DE, USA aut Schumacher Thomas Civil and Environmental Engineering, Portland State University, Portland, OR, USA aut Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/4(2015-12-01), 1-13 0195-9298 34:4<1 2015 34 10921 https://doi.org/10.1007/s10921-015-0311-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10921-015-0311-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mhamdi Lassaad Civil and Environmental Engineering, University of Delaware, Newark, DE, USA aut NATIONALLICENCE 700 1- Schumacher Thomas Civil and Environmental Engineering, Portland State University, Portland, OR, USA aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/4(2015-12-01), 1-13 0195-9298 34:4<1 2015 34 10921