Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

In assessing the probability of detection (POD) of flaws during ultrasonic inspection, one needs to know the distribution of signal strengths that would be produced by flaws of the same nominal size [1]. Several factors contribute to creating such a distribution, including variations in flaw morphology, variations in the position of the flaw with respect to the insonifying beam, modifications of the beam by the microstructure, and the interaction between the flaw signal and noise signal backscattered from microstructural inhomogeneities. This paper deals with the latter mechanism, developing models which predict the distribution of signal in the presence of noise in terms of independent measures of the noise and the noise free flaw response.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17A

Chapter

Chapter 1: Standard Techniques

Section

Elastic Wave Scattering/Backscattering

Pages

105-112

DOI

10.1007/978-1-4615-5339-7_13

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Use of Rician Distributions to Predict the Distributions of Ultrasonic Flaw Signals in the Presence of Backscattered Noise

La Jolla, CA

In assessing the probability of detection (POD) of flaws during ultrasonic inspection, one needs to know the distribution of signal strengths that would be produced by flaws of the same nominal size [1]. Several factors contribute to creating such a distribution, including variations in flaw morphology, variations in the position of the flaw with respect to the insonifying beam, modifications of the beam by the microstructure, and the interaction between the flaw signal and noise signal backscattered from microstructural inhomogeneities. This paper deals with the latter mechanism, developing models which predict the distribution of signal in the presence of noise in terms of independent measures of the noise and the noise free flaw response.