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Vliv nejistoty v určení časových diferencí na přesnost lokalizace zdroje akustické emise
 Blaháček, Michal
Acoustic emission (AE) is a non-destructive testing method using acoustic, mostly ultrasonic, waves emitted by AE sources and propagating in structure to find out desired information about the tested construction or sample state. The AE source location is its basic (and very important) parameter. Most of location algorithms use time differences of AE signal arrival times from the source to different transducers and acoustic wave propagation velocity as input data.However, the parameters are often difficult to obtain in real conditions, especially out of laboratory and in the working conditions where acoustic noise is presented. Main goal of this paper is to analyze influence of time differences uncertainty (i.e. errors in the detected times)and the elastic wave velocity uncertainty on AE source 2-D location accuracy. The analysis will be done for a classic triangulation location algorithm.
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