Magnetostrictive strain sensor (airgap control)

Details Magnetostrictive strain sensor (airgap control) Magnetostrictive strain sensor (airgap control)

2007-06-26

2007-06-26

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

Reexamination Certificate

active

11034440

ABSTRACT:
A sensor assembly for measuring force along an axis (F) comprises an inductance coil extending around the axis (F) for establishing a loop of magnetic flux looping axially through the coil and extending around the axis (F) to define a donut shaped ring of magnetic flux surrounding the axis (F). A core of magnetostrictive material provides a primary path for the magnetic flux in a first portion of the loop of magnetic flux and a magnetic carrier provides a return path for magnetic flux in a second portion of the loop of magnetic flux as the magnetic flux circles the coil through the core and the carrier. A first interface extends radially between the core and the carrier whereby the core and the carrier are urged together at the interface in response to a force applied parallel to the axis (F). Various embodiments or combinations of the core and carrier are illustrated in FIGS.3–7.

REFERENCES:
patent: 6622577 (2003-09-01), Uras
patent: 2004/0107777 (2004-06-01), Lequesne et al.

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