Location

Seattle, WA

Start Date

1-1-1996 12:00 AM

Description

In this paper, we present a technique to generate the axial shear acoustic resonance in a cylindrical rod and pipe by a magnetostrictively coupled EMAT. The technique is based on the electromagnetic acoustic resonance (EMAR) [1–7]. The EMAR is a combination of the ultrasonic resonance technique and a noncontacting EMAT. The heavily and coherently overlapping echoes at a resonant state improves the signal-to-noise ratio to a large extent and compensates enough for the weak coupling efficiency with the EMATs. The EMAR method was first proposed by Filimonov et al. [1] and Nikiforenko et al. [2]. In recent years, several researchers have developed this technique for the wide range of the noncontact inspection and materials characterization [3–7].

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

15B

Chapter

Chapter 8: Systems, New Techniques and Process Control

Section

Systems

Pages

1939-1944

DOI

10.1007/978-1-4613-0383-1_254

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Generation of Axial Shear Acoustic Resonance by Magnetostrictively Coupled Emat

Seattle, WA

In this paper, we present a technique to generate the axial shear acoustic resonance in a cylindrical rod and pipe by a magnetostrictively coupled EMAT. The technique is based on the electromagnetic acoustic resonance (EMAR) [1–7]. The EMAR is a combination of the ultrasonic resonance technique and a noncontacting EMAT. The heavily and coherently overlapping echoes at a resonant state improves the signal-to-noise ratio to a large extent and compensates enough for the weak coupling efficiency with the EMATs. The EMAR method was first proposed by Filimonov et al. [1] and Nikiforenko et al. [2]. In recent years, several researchers have developed this technique for the wide range of the noncontact inspection and materials characterization [3–7].