41 - Analysis of AE source location precision for general sensor confgurations

Proper sensor placement is the crucial step and a premise for precise AE source location estimate. Optimal sensor configuration in cases of complex structure shapes is one of AE expert challenges. It leads to numerical analysis of relations between the signal arrival chronology and the coordinates o...

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Bibliographic Details
Published in:Journal of acoustic emission 2018-01, Vol.35, p.S419
Main Authors: Chlada, Milan, Galis, Petr, Prevorovsky, Zdenek
Format: Article
Language:English
Subjects:
Analysis
Anisotropy
Global Positioning System
Numerical analysis
Sensors
Online Access:Get full text
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Summary:Proper sensor placement is the crucial step and a premise for precise AE source location estimate. Optimal sensor configuration in cases of complex structure shapes is one of AE expert challenges. It leads to numerical analysis of relations between the signal arrival chronology and the coordinates of emission sources. Using the algorithm for finding the shortest ways in discretely defined bodies it is possible to design three parallel tools how to evaluate problematic areas, namely the location sensitivity, similarity and ambiguity maps, available even for non-continuous or anisotropic materials. Analogically to Global Positioning System, location of AE sources meets the geometrical dilution of precision (GDOP) phenomena. Similarly to GDOP parameter, recently introduced sensitivity map shows critical regions characterized by strong sensitivity of location results to signal arrival time changes or errors. Remaining two mentioned methods illustrate the topology of arrival time differences space and possible ambiguities of source location. To check the numerical forecast of location capabilities of given sensor configuration, theoretical results were reviewed with the data measured during real experiment.
ISSN:0730-0050