Acoustic vector sensing sonar system

Details Acoustic vector sensing sonar system Acoustic vector sensing sonar system

1998-01-27

1999-07-27

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With beam steering, scanning, or focussing

G01S 380

Patent

active

059302011

ABSTRACT:
A system for the detection of acoustic signals utilizing an array of acoustic sensors coupled to a beamformer which generates a steered acoustic beam using the output from one or more of the acoustic sensors within the array. The acoustic sensors include a multiaxis vector sensor co-located with a scalar acoustic pressure sensor. The beamformer generates a weighted output for each acoustic sensor by combining the weighted output of the scalar pressure sensor with the scalar field generated by forming the inner product of the vector components measured at each sensor location with a vector component weighting vector. The weighted output signals are delayed to synchronize the phase of the weighted output signal to that of a weighted signal at a reference array location. The resulting delayed weighted output signals are then summed.

REFERENCES:
Hawkes et al., "Bearing Estimation with Acoustic Vector-Sensor Arrays", AIP onference Proceedings, No. 368, pp. 345-358, ISSN 0094-243X 1996.
D'Spain GL., "Relationship of Underwater Acoustic Intensity measurement to Beamforming", Canadian Acoustics, vol. 22, No. 3, pp. 157-158 Sep. 1994.

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