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Titolo:
MONTE-CARLO SIMULATION OF FALSE ALARMS AND DETECTION RELIABILITY IN MAGNETIC-FLUX LEAKAGE INSPECTION OF STEEL TUBES
Autore:
ALTSCHULER E; PIGNOTTI A; PAIUK J;
Indirizzi:
FDN DESARROLLO TECNOL,CTR IND RES,L ALEM 1067 RA-1001 BUENOS AIRES DFARGENTINA TECHINT,DITEC RA-1001 BUENOS AIRES DF ARGENTINA
Titolo Testata:
Materials evaluation
fascicolo: 9, volume: 54, anno: 1996,
pagine: 1032 - 1034
SICI:
0025-5327(1996)54:9<1032:MSOFAA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Keywords:
CRACKS; DETECTION RELIABILITY; FALSE ALARMS; MAGNETIC FLUX LEAKAGE; MONTE CARLO SIMULATION; NONDESTRUCTIVE TESTING; PIPING; STEEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
8
Recensione:
Indirizzi per estratti:
Citazione:
E. Altschuler et al., "MONTE-CARLO SIMULATION OF FALSE ALARMS AND DETECTION RELIABILITY IN MAGNETIC-FLUX LEAKAGE INSPECTION OF STEEL TUBES", Materials evaluation, 54(9), 1996, pp. 1032-1034

Abstract

The same flaw gives rise to different signals when inspected by the same nondestructive testing (NDT) equipment under closely similar circumstances. A laboratory example involving six identical cracks is shown. This is a consequence of unavoidable fluctuations in the parameters that influence the detection process and is illustrated using a Monte Carlo simulation based on a numerical model of crack detection in steel pipes by magnetic flux leakage. The effects of these uncertainties on the fault detection reliability and on the appearance of false alarms are analyzed. The occurrence of Type I errors (lack of detection of unacceptable defects) and Type II errors (false alarms) is studied as a function of the detection threshold, and guidelines for improving detection efficiency are suggested.

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Documento generato il 01/10/20 alle ore 15:51:18