Method for designing an acoustic array
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsStephen C Butler, Thomas A Frank, Jackeline D Diapis
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Abstract
A method for designing an acoustic array includes establishing a desired beam pattern, acoustic wavelength and beamwidth for the array. Geometric parameters are calculated from these constraints. The array is modeled as a plurality of elements positioned in accordance with the geometric parameters. An amplitude shading function is calculated. An array of acoustic elements is constructed having an area calculated from the calculated amplitude shading function. An acoustic array designed by this process is further provided.
Claims16
A method for designing an acoustic array comprising:
- determining a desired beam pattern of angles and associated power levels for the array;
- determining a desired acoustic wavelength for the array;
- determining a desired beamwidth for the array;
- establishing an array radius of curvature based on the determined acoustic wavelength and the desired beamwidth;
- modeling the array as a plurality of elements positioned on a curved surface having the established array radius of curvature;
- calculating an amplitude shading function as a plurality of weightings that when applied to the modeled array would give the desired beam pattern;
- and
- constructing an array of acoustic elements in accordance with the modeled array radius of curvature with each element at a location having an area proportional to at least one weighting given by the calculated amplitude shading function.
An acoustic array for a predetermined beam pattern comprising a plurality of elements with each element having an area and a position, wherein the area of the element corresponds to a power level and the position corresponds to a time delay, the power levels and the time delays being calculated to give the predetermined beam pattern.
Dependencies are inferred from the claim text.