Method and apparatus for sensing permanent state deviations

G - Physics – 01 – H

Patent

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Details

G01H 11/04 (2006.01) G01B 7/24 (2006.01) G01L 1/12 (2006.01) G01P 15/08 (2006.01) G01P 15/11 (2006.01)

Patent

CA 2489171

The disclosure relates to a method and an apparatus for sensing and indicating permanent state deviations via detection of temporary inner material oscillations in real time in parts of importance for hardware design and construction, within existing production equipment, e.g. machinery, and/or monitoring of previously built-up infrastructure. One or more at least approximately 20 ~m thick amorphous or nanocrystalline band elements with high permeability and relatively high magnetostriction are applied to a pertinent part, the band element or elements, respectively, being at least partially surrounded by a multi-turn coil, such atomic movements (oscillations) as occur in any optional such state deviation in the part being transferred to the band element/elements. The deviation either gives rise to a clearly measurable and detectable magnetic flow change (dB/dt) in the coil in proportion to said atomic movements, or to a similarly measurable and detectable inductance change in the coil/coils.

L'invention concerne un procédé et un appareil pour capter et indiquer des modifications d'état permanent par la détection d'oscillations de matières internes en temps réel dans des pièces d'importance pour la conception matérielle et la construction, au sein d'un équipement de production existant, par exemple des machines, et/ou pour la surveillance d'infrastructures construites au préalable. Au moins un élément en bande nanocristallin ou amorphe d'environ 20 µm d'épaisseur possédant une grande perméabilité et une magnétorestriction relativement élevée est appliqué sur une pièce pertinente, le ou les éléments en bande étant respectivement au moins partiellement entourés d'une bobine à spires multiples, de sorte que les mouvements atomiques (oscillations), tels que ceux qui apparaissent dans une modification d'état dans la pièce soient transférés à/aux éléments en bande. La modification induit, soit un changement de flux magnétique nettement mesurable et détectable (dB/dt) dans la bobine proportionnellement auxdits mouvements atomiques, soit un changement d'inductance mesurable et détectable de manière nette de la/des bobines.

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