High frequency magnetostrictive transducers for waveguide applications
AssigneeU.S. Department of Energy
InventorsJoshua Earl Daw, Steven Cheney Taylor, Joy Lynn Rempe
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Abstract
A high frequency magnetostrictive transducer includes a magnetostrictive rod or wire inserted co-axially into a driving coil, wherein the driving coil includes a coil arrangement with a plurality of small coil segments along the magnetostrictive rod or wire; wherein frequency operation of the high frequency magnetostrictive transducer is controlled by a length of the small coil segments and a material type of the magnetostrictive rod or wire. This design of the high frequency magnetostrictive transducer retains the beneficial aspects of the magnetostrictive design, while reducing its primary drawback, lower frequency operation.
Claims18
A high frequency magnetostrictive transducer comprising:
- a magnetostrictive rod or wire inserted co-axially into a driving coil, wherein the driving coil comprises a coil arrangement with a plurality of small coil segments electrically connected in series along the magnetostrictive rod or wire;
- wherein an operating frequency of the high frequency magnetostrictive transducer is controlled by a length of the small coil segments and a material type of the magnetostrictive rod or wire;
- and
- wherein the length of each small coil segment and a spacing between each of the small coil segments are approximately defined by the equation L=c/2·f, where c is a sound velocity in the magnetostrictive rod or wire, f is the operating frequency, and L is the length of each small coil segment or the spacing between the small coil segments.
A high frequency magnetostrictive transducer system comprising:
- one or more high frequency magnetostrictive transducers comprising a magnetostrictive rod or wire inserted co-axially into a driving coil, wherein the driving coil comprises a coil arrangement with a plurality of small coil segments electrically connected in series along the magnetostrictive rod or wire, and wherein an operating frequency of the high frequency magnetostrictive transducer is controlled by a length of the small coil segments and a material type of the magnetostrictive rod or wire, and wherein the length of each small coil segment and a spacing between each small coil segments is approximately defined by the equation L=c/2·f, where c is a sound velocity in the magnetostrictive rod or wire, f is the operating frequency, and L is the length of each small coil segment or spacing between the small coil segments;
- a source configured to drive the one or more high frequency magnetostrictive transducers;
- and
- a detection device coupled to the one or more high frequency magnetostrictive transducers.
Dependencies are inferred from the claim text.