Naslov
A digital signal processing technique for pulsed electromagnetic inspection of steel tubes

Autori
Šnajder, Boris ; Vasić, Darko ; Bilas, Vedran ;

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
15th Symposium on Novelties in Electrical Measurements and Instrumentation (IMEKO TC4) : proceedings / Cretu, Mihai - Iași : International Measurement Confederation (IMEKO), 2007, F005-5

Skup
Symposium on Novelties in Electrical Measurements and Instrumentation (15 ; 2007)

Mjesto i datum
Iaşi, Rumunjska, 18.09.2007. - 22.09.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
digital signal processing; pulsed electromagnetic inspection

Sažetak
A pulsed electromagnetic (PEM) technique is an effective method of nondestructive evaluation of steel tube inner diameter and wall thickness. Using time-spatial separation of direct-zone and remote-zone signals, it is possible to determine wall thickness and inner diameter with one receiving coil measuring voltage peak and zero-crossing time simultaneously. However, for fixed coil geometry the zero-crossing time can be recognized only for a limited range of wall thickness. In order to increase wall thickness range and shorten the probe, additional processing of the pulsed-eddy current signal must be applied. In this paper, we present a technique based on integration of the pick-up voltage and measurement of threshold-crossing time. The technique can be easily implemented in the existing PEM tool. We have verified the technique using numerically and experimentally obtained results for a range of tubes specified with API 5CT standard.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA