Location

Seattle, WA

Start Date

1-1-1996 12:00 AM

Description

The backscattered signal information in ultrasonic testing is an effective method for characterization and detection of defects in materials. The complexity of materials like composites, mixed metals, multilayered fiber-reinforced composites and materials with complex structures used in nuclear power plants and spacecraft add new challenges towards the characterization and defect detection. Due to frequency dependent scattering and attenuation the backscattered ultrasonic signal is nonstationary in character. Therefore, joint time-frequency (t-f) representations of such signals are more revealing than the standard Fourier analysis.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

15B

Chapter

Chapter 8: Systems, New Techniques and Process Control

Section

New Techniques

Pages

2089-2096

DOI

10.1007/978-1-4613-0383-1_274

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Joint Time-Frequency Processing of Ultrasonic Signals

Seattle, WA

The backscattered signal information in ultrasonic testing is an effective method for characterization and detection of defects in materials. The complexity of materials like composites, mixed metals, multilayered fiber-reinforced composites and materials with complex structures used in nuclear power plants and spacecraft add new challenges towards the characterization and defect detection. Due to frequency dependent scattering and attenuation the backscattered ultrasonic signal is nonstationary in character. Therefore, joint time-frequency (t-f) representations of such signals are more revealing than the standard Fourier analysis.