Hybrid-drive multi-mode pipe projector
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence of Her Majesty's Canadian Government
InventorRichard A. G. Fleming
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Abstract
A hybrid drive (HD) multi-mode pipe projector (MMPP) for use in underwater acoustic applications is provided. The HD MMPP is formed with an inner magnetostrictive drive motor nested within an outer drive motor. The inner motor is surrounded by a magnetic field generating coil winding. Preferably the inner drive motor is a Terfenol-D motor and the outer drive motor is a radially-poled piezoceramic drive motor. This nested configuration provides increased bandwidth and low-frequency extension to the MMPP design.
Claims12
An acoustic projector having a pair of spaced apart tubular pipe waveguides, each waveguide extending inwards and surrounding opposing end portions of the projector, the acoustic projector comprising:
- a piezoceramic outer drive motor extending longitudinally between the waveguides, the outer drive motor having a smaller cross-sectional dimension than the waveguides;
- and
- a magnetostrictive inner drive motor nested within the outer drive motor and extending longitudinally between the two waveguides.
Dependencies are inferred from the claim text.