Computer Simulation of Probability of Detection

Fertig, Kenneth W.; Richardson, John M.

doi:10.1007/978-1-4613-3706-5_9

Cited by 13 publications

(13 citation statements)

References 3 publications

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“…In a 1983 paper, Fertig and Richardson (1983) at the Rockwell International Science Center developed and described an integrated model for assessing the performance of an ultrasonic inspection system for detecting internal flaws. Their model is able to calculate the performance of the ultrasonic system in terms of probability of detection and other related quantities.…”

Section: Historical Perspective From the Literaturementioning

confidence: 99%

Probability of Detection (POD) for Nondestructive Evaluation (NDE)

Matzkanin¹,

Yolken²

2001

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Section: Historical Perspective From the Literaturementioning

confidence: 99%

Probability of Detection (POD) for Nondestructive Evaluation (NDE)

Matzkanin¹,

Yolken²

2001

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“…Impurities within the grain structure, weld Interfaces, and adjacent surfaces within the flawed component. Acoustic noise is a convolution type noise, that is, it Involves the convolution of measurement system effects with a noise related operator (Fertig and Richardson 1983). Therefore, acoustic noise can be modeled in the time domain as where H(t) and M(w) are as defined relative to Equations (2.13) and (2.14), is an effective propagation effects term and Rg^(t) and A^ ((«>) represent an effective Impulse response function and an effective scattering amplitude, respectively, associated with the dominate source of the acoustic noise.…”

Section: Deterministic Modelsmentioning

confidence: 99%

“…Therefore, acoustic noise can be modeled in the time domain as where H(t) and M(w) are as defined relative to Equations (2.13) and (2.14), is an effective propagation effects term and Rg^(t) and A^ ((«>) represent an effective Impulse response function and an effective scattering amplitude, respectively, associated with the dominate source of the acoustic noise. These terms are said to be "effective" since P^(w) and A^(b)) are average or effective operators associated with scattering at a distribution of scattering sites (e.g., scattering from a large number of grains) rather than scattering from a single target (Fertig and Richardson 1983).…”

Section: Deterministic Modelsmentioning

confidence: 99%

“…In principle, H^(a>) and an estimate of the variance (the average power) of Ag^(w) could be established via a model based approach where the parameters in the model would be determined based on the measurement conditions and perhaps a single measurement taken adjacent to the flaw to be characterized. Some work has been done in this area (Fertig and Richardson 1983); however, at this point, neither H_(w) nor A (co) is understood well to make such an approach feasible. Further work in this area is underway relative to modeling noise for probability of detection studies (Gray 1988).…”

Section: S/n (Db) 'mentioning

confidence: 99%

“…These terms are said to be "effective" since P^(w) and A^(b)) are average or effective operators associated with scattering at a distribution of scattering sites (e.g., scattering from a large number of grains) rather than scattering from a single target (Fertig and Richardson 1983).…”

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confidence: 99%

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A prior knowledge based optimal Wiener filtering approach to ultrasonic scattering amplitude estimation

Neal

Thompson

1989

The Journal of the Acoustical Society of America

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, "A prior knowledge based optimal Wiener filtering approach to ultrasonic scattering amplitude estimation " (1988). Retrospective Theses and Dissertations. 8877. http://lib.dr.iastate.edu/rtd/8877 INFORMATION TO USERSThe most advanced technology has been used to photo graph and reproduce this manuscript from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are re produced by sectioning the original, beginning at the upper left-hand corner and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. These are also available as one exposure on a standard 35mm slide or as a 17" x 23" black and white photographic print for an additional charge.Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. Signature was redacted for privacy.Signature was redacted for privacy.Signature was redacted for privacy. The work reported here is associated with flaw characterization.This work is motivated from an engineering perspective by considering two fundamentally different approaches to life prediction that can be found in fatigue of materials and structures. In a simplistic sense, a "safe life"or "zero defects" fatigue life prediction approach (Coffin and Tiffany 1976) assumes that once a flaw is macroscopic, i.e., once a flaw has grown to a size which can be detected by NDE techniques, failure is imminent and the component must be taken out of service. With this approach, qualitative NDE indicating the presence or absence of a flaw provides sufficient information to determine if a component should be retired. An alternative approach, which is sometimes referred to as a "damage tolerance" approach, is based on a fracture mechanics methodology (Coffin and Tiffany 1976, Rolfe and Barsom 1977). With this approach, instead of assuming that all flawed components must be taken out of service, the 2 severity of the flaw is assessed and a more rational determination of the remaining life of the component is made. To implement this approach, quantitative flaw characterization is required. As a minimum...

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Considerations for Quantitative NDE and NDE Reliability Improvement

Rummel¹

1983

Review of Progress in Quantitative Nondestructive Evaluation

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A challenge has been presented to the scientific community to apply "first principles" to the understanding, prediction, and control of nondestructive evaluation (NDE) processes and applications. The success of the program is evident in the attention of new researchers and in the diversity of scientific specializations that have been directed to NDE problems. Critique of the program has been in awareness of existing technology and in focus of resources. An approach based on "lessons learned" is suggested for meeting continuing challenges and projected challenges of the future. "Lessons learned" from NDE reliability assessment programs are reviewed. Quantitative NDE performance as a function of signal-tonoise ratio is discussed. Focus of future efforts on signal-tonoise improvements in production and maintenance environments is proposed.

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Computer Simulation of Probability of Detection

Cited by 13 publications

References 3 publications

Probability of Detection (POD) for Nondestructive Evaluation (NDE)

Probability of Detection (POD) for Nondestructive Evaluation (NDE)

A prior knowledge based optimal Wiener filtering approach to ultrasonic scattering amplitude estimation

Considerations for Quantitative NDE and NDE Reliability Improvement

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