Device for measuring intensity of magnetic or electromagnetic fields using strain gauges mounted on ferromagnetic plates
OwnerVladimir A. Smirnovinventor
Life of this patent
Estimating the term…
Abstract
A device for converting the intensity of a magnetic or an electromagnetic field into an electric signal wherein movable elements are made as ferromagnetic plates rigidly fixed in supports so that their free ends overlap each other. Mounted on the deformation section in the immediate vicinity to the place where the ferromagnetic plate is fixed in its support is an element sensing the displacements of the free ends of the plates with respect to each other. The sensing element is made as at least one resistance strain gauge connected to a measuring circuit.
Claims8
A device for measuring the intensity of a magnetic or electromagnetic field produced by a field source comprising:
- a first elongate flat plate formed of a ferromagnetic material having first and second end portions, said first end portion thereof being rigidly fixed to a first support member so that said first plate extends from said first support member in a cantilevered manner;
- a second elongate flat plate formed of a ferromagnetic material having respective first and second end portions, said first end portion thereof being rigidly fixed to a second support member so that said second plate extends from said second support member in a cantilevered manner, said second end portion of said first plate being located in spaced opposed relationship to said second end portion of said second plate to define a gap therebetween, said first and second plates forming a flux path for said field source;
- at least one of either said first and second plates and first and second support members comprising a deformation section in the region immediately proximate to the respective points at which said first and second plates are rigidly fixed to said first and second support members, respectively, said at least one deformation section being subject to deformation upon deflection of said first and second plates by said magnetic field;
- at least one resistance strain gauge means mounted on a respective one of said deformation sections and said at least one resistance strain gauge means having an axis appropriately aligned on said at least one of either said first and second plates for generating an electrical signal output indicative of the deformation of said deformed section caused by a relative displacement of said second end portions of said first and second plates upon deflection thereof;
- and
- a measuring circuit coupled to said at least one strain gauge means for measuring the electrical signal output thereof.
Dependencies are inferred from the claim text.