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All Terms

A. 基础概念（Fundamentals） 1．Acoustic Emission (AE) 2．AE Source 3．Elastic Wave 4．Transient Signal 5．Stress Wave 6．Passive Monitoring 7．Active Source 8．Structural Health Monitoring (SHM) 9．Damage Mechanism 10．Energy

AE Signal Processing Overview

Definition Acoustic emission (AE) signal processing refers to the methods and techniques used to acquire, filter, analyze, and interpret acoustic emission signals generated by materials or structures during active processes such as crack growth, defo

ASL (Average Signal Level)

Definition ASL (Average Signal Level) is a parameter representing the average acoustic emission signal level over a specified time period. Explanation ASL is widely used in continuous AE monitoring applications where long-term signal trends are m

Signal Processing

Definition Signal processing is the analysis and manipulation of acoustic emission (AE) signals to improve signal quality and extract meaningful information. Explanation In acoustic emission testing, signal processing is used to filter noise, amp

Waveform Analysis

Waveform Analysis Definition Waveform analysis is the study of the shape and characteristics of acoustic emission (AE) signals in the time and frequency domains. Explanation Unlike parameter-based AE analysis that uses extracted values such as amplitu

FFT (Fast Fourier Transform)

Definition FFT (Fast Fourier Transform) is a mathematical algorithm used to convert a time-domain signal into its frequency-domain spectrum. Explanation In acoustic emission analysis, FFT is widely used to identify dominant frequencies and distin

Rise Time

Rise Time Definition Rise time is the time interval between the first threshold crossing and the peak amplitude of an AE signal. Explanation Rise time provides information about the source characteristics and signal propagation behavior. It is commonl

RMS (Root Mean Square)

RMS (Root Mean Square) Definition RMS (Root Mean Square) is a statistical parameter used to represent the average signal magnitude of an acoustic emission waveform. Explanation In acoustic emission monitoring, RMS is commonly used for continuous signa

AE Energy

8、 AE Energy Definition AE energy is a measure of the signal strength over time, representing the total energy of an acoustic emission signal. Explanation It is commonly calculated from the signal envelope and used to assess the severity of damage p

Frequency Analysis

Definition Frequency analysis is the process of examining the frequency components of acoustic emission signals. Explanation Different AE sources often generate different frequency characteristics, making frequency analysis useful for source iden