Nonlinear techniques for pressure vector acoustic sensor...

Details Nonlinear techniques for pressure vector acoustic sensor... Nonlinear techniques for pressure vector acoustic sensor...

2007-09-25

2007-09-25

Pihulic, Daniel (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

Reexamination Certificate

active

11136764

ABSTRACT:
The present invention presents a method for use with an acoustic sensor array comprised of a number of pressure-vector sensors capable of sensing the acoustic scalar field and acoustic vector field of an acoustic wave. The method is a signal processing technique that utilizes nonlinear processing of pressure-vector sensor signals in the acoustic sensor array. The method involves the steps of receiving the sensor output values, processing the output values using a non-linear algorithm to create a mathematical series of values, transforming the series, applying weighting to the series and performing a summation of the values in the series to calculate the array directivity response. The array directivity response can then be further processed where the array is part of a sonar system.

REFERENCES:
patent: 5930201 (1999-07-01), Cray
patent: 6370084 (2002-04-01), Cray
patent: 6697302 (2004-02-01), Cray et al.
Cray et al.; Directivity factors for linear arrays of velocity sensors; Jul. 2001; J. Acoust. Soc. Am. 110 (1), Jul. 2001; pp. 324-331.

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