Permanent multi-pole position magnet
AssigneeMTS Sytems Corporation
InventorArnold F. Sprecher, Jr.
Life of this patent
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Abstract
A precision permanent position magnet assembly for use with a magnetostrictive linear displacement transducer having a magnetostrictive waveguide to provide an enhanced return signal is disclosed. The North-South axes of the magnet assembly are perpendicular to the waveguide center line axis and preferably includes three bar-type permanent magnets in a side by side alternating polarity configuration spaced apart with the pole spacing being one-half the wavelength of the return signal imposed on the waveguide. Three sets of such magnets may be radially disposed at 120 degree increments in a non-magnetic carrier.
Claims13
A position magnet assembly for use with a magnetostrictive waveguide carrying return signals, comprising:
- a. at least one set of magnets positioned near the magnetostrictive waveguide said one set including two juxtaposed magnets having the same pole facing the magnetostrictive waveguide;
- b. the axes of the North-South poles of each of said magnets is perpendicular to the center line of the axis of the magnetostrictive waveguide;
- c. wherein said magnets are spaced along the waveguide such that the peak magnitude of a combined return signal resulting from interaction of said magnets with the waveguide is greater than the peak magnitude of either magnet return signal individually.
Dependencies are inferred from the claim text.