Non-destructive evaluation distribution sensors based on magnetostrictive delay lines

Hristoforou, E; Niarchos, D; Chiriac, H; Neagu, M

dc.contributor.author	Hristoforou, E	en
dc.contributor.author	Niarchos, D	en
dc.contributor.author	Chiriac, H	en
dc.contributor.author	Neagu, M	en
dc.date.accessioned	2014-03-01T01:16:47Z
dc.date.available	2014-03-01T01:16:47Z
dc.date.issued	2001	en
dc.identifier.issn	09244247	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14224
dc.subject	Eddy currents	en
dc.subject	Magnetostrictive delay lines	en
dc.subject	Non-destructive evaluation	en
dc.subject.other	Cracks	en
dc.subject.other	Eddy currents	en
dc.subject.other	Magnetic field effects	en
dc.subject.other	Magnetostriction	en
dc.subject.other	Metals	en
dc.subject.other	Nondestructive examination	en
dc.subject.other	Strain	en
dc.subject.other	Surfaces	en
dc.subject.other	Voltage measurement	en
dc.subject.other	Magnetostrictive delay lines	en
dc.subject.other	Microstrain generation	en
dc.subject.other	Nondestructive evaluation distribution sensors	en
dc.subject.other	Pulsed voltage signals	en
dc.subject.other	Sensors	en
dc.title	Non-destructive evaluation distribution sensors based on magnetostrictive delay lines	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0924-4247(01)00551-9	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0924-4247(01)00551-9	en
heal.publicationDate	2001	en
heal.abstract	In this paper, we present a non-destructive evaluation sensor able to perform distribution measurements on metallic surfaces. The sensing principle is based on the magnetostrictive delay line (MDL) technique. The pulsed MDL excitation field generates eddy currents on the test surface, which are balanced when no cracks are present. In case of cracks, these eddy currents are summed up around the inhomogeneity, thus causing microstrain generation in the region of the MDL close to the crack. The amplitude and time delay of the detected pulsed voltage signals corresponding to those additional microstrains caused by the eddy currents, are the indication of the size and the position of the defect on the test surface. In this paper, we present the sensing principle as well as the first results in such kind of measurements.	en
heal.journalName	Sensors and Actuators, A: Physical	en
dc.identifier.doi	10.1016/S0924-4247(01)00551-9	en
dc.identifier.volume	92	en
dc.identifier.issue	1-3	en
dc.identifier.spage	132	en
dc.identifier.epage	136	en