Descriptive Analysis and Acoustic Emission Signals Parameters Assessments: Signal Processing Data

This article presents the results of processing full-scale acoustic emission signals obtained at selective laser melting (SLM) process. During the recording of acoustic emission signals during the SLM process, electrical noise and continuous noise arise. For filtering these noises, their frequencies are identified. Noise suppression was carried out on the basis of the previously developed and proposed method for filtering the acoustic emission signal. The scheme of bi-directional filtering and their convolution in the frequency domain is presented. An increase in the efficiency of acoustic emission signal processing has been established. Descriptive analysis of the results before and after filtering the signal parameter shows a statistically significant difference. This difference characterizes the increase in the information content of the measurement results.