Location

Santa Cruz, CA

Start Date

1-1-1984 12:00 AM

Description

Modern signal processing techniques used in computing flaw impulse response are based on comparative analysis of a reference signal with the signal scattered from flaws. The underlying hypothesis in these techniques is that, in the noise free case, the scattered flaw signal is due to the linear convolution of the ultrasonic reference signal with the flaw impulse response. The flaw characterization problem thus reduces to determining the kernel of the convolution integral given the input and output time signals. The impulse response recovery (system identification) has been carried out both in the frequency and time domains for flaw characterization.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

3A

Chapter

Chapter 2: Ultrasonics

Section

Signal Processing

Pages

351-358

DOI

10.1007/978-1-4684-1194-2_33

Language

en

File Format

application/pdf

Share

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Jan 1st, 12:00 AM

Homomorphic Processing in Ultrasonic NDE

Santa Cruz, CA

Modern signal processing techniques used in computing flaw impulse response are based on comparative analysis of a reference signal with the signal scattered from flaws. The underlying hypothesis in these techniques is that, in the noise free case, the scattered flaw signal is due to the linear convolution of the ultrasonic reference signal with the flaw impulse response. The flaw characterization problem thus reduces to determining the kernel of the convolution integral given the input and output time signals. The impulse response recovery (system identification) has been carried out both in the frequency and time domains for flaw characterization.