Advances in Materials Science and Engineering

Research Article

Acoustic Emission Measurement by Fiber Bragg Grating Glued to Cylindrical Sensor Holder

Figure 13

Examples of detected AE signal by wide band piezo-type AE sensor and its FFT, its WT analysis, and WMFD in each region of the 3-point bending test in Figure 12(a).
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(a) Example of detected signal and analysis results in Region I
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(b) Example of detected signal and analysis results in Region II
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(c) Example of detected signal and analysis results in Region III
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(d) Example of detected signal and analysis results in Region IV