Acoustic Emission Strength Evaluation Device
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Solution Overview
Problem
Current methods for determining the tensile strength of fiber reinforced composite materials using acoustic emission waves require lengthy processing times, necessitating a technique to shorten this time for real-time evaluation.
Innovation Solution
A strength testing method and device that generates spectrum data from acoustic emission waves, identifies intensity peaks, and extracts data parts with intensities above a set percentage of the peak, allowing for real-time determination of tensile strength by focusing on specific data rather than processing all spectrum data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all spectrum data is processed to determine tensile strength, then measurement precision is improved, but processing time increases
Solution Approach 1:
The patent extracts only the essential features from the complete spectrum data by identifying peak frequencies and their intensities. Instead of processing all spectral information, the method selectively extracts peak data points that are sufficient for tensile strength determination, thereby reducing processing time while maintaining measurement precision
Solution Approach 2:
The patent applies partial action by processing only a subset of the spectrum data - specifically focusing on peak regions rather than the entire spectrum. This selective processing of critical data portions achieves accurate tensile strength measurement without the computational burden of complete spectrum analysis
2Reliability
If complete spectrum data processing is performed, then reliability of strength determination is improved, but productivity decreases
Solution Approach 1:
The method extracts peak frequency data and intensity information from the spectrum, obtaining the essential reliability-indicating features without processing redundant spectral data. This extraction approach maintains determination reliability while enabling faster evaluation
Solution Approach 2:
The patent transforms the complete spectrum data into simplified parameters (peak frequency and intensity values). By changing the data representation from continuous spectrum to discrete peak parameters, the system achieves both reliability through accurate peak identification and productivity through reduced computational complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the determination of tensile strength in shorter processing times, specifically in real-time, by extracting relevant data parts from acoustic emission waves, reducing unnecessary processing and improving the efficiency of the evaluation process.
Implementation Method 1
an AE wave generated in the test body by the tensile load
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
A tensile load is applied to the test body to increase with time, and an AE wave displacement in the test body is detected (step S1). From the detected AE wave, waveform data are generated for each time section (step S2). For each section, from the waveform data, spectrum data are generated (step S3), a peak of an intensity in the spectrum data is specified, a data part in which an intensity is at least a value of a set percentage of the peak in the spectrum data is extracted as processing target data (step S4), and from the processing target data, the most frequent value of frequency gravity centers is specified (step S5). The most frequent value for each section and a tensile load applied to the test body in each section are output as strength evaluation data for evaluating a tensile strength of the test body (step S6).