Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With beam steering – scanning – or focussing
Patent
1980-06-06
1981-11-17
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With beam steering, scanning, or focussing
367 19, 367130, G01S 382
Patent
active
043015239
ABSTRACT:
Apparatus for determining the bearing of an acoustic source from a selected ocation in an acoustic environment includes a plurality of discrete acoustic sensor elements and a flexible member, having first and second ends, which may be deployed in a linear configuration in the environment. The sensor elements are attached along the flexible member in spaced apart relationship, one of the elements, comprising a lead element, being closer to the first end than any of the other elements. A motion measuring device is coupled to the lead element when the flexible member is deployed in the environment to generate signals which indicate the velocity of the lead sensor element in the environment. A processor, having an input which is limited to lead element velocity signals, generates estimates of the positions of respective sensor elements when the flexible member is deployed in the environment at the selected location, and beam steering equipment, coupled to the processor steers an acoustic detection beam in response to the position estimates to determine the bearing of the acoustic signal source, the acoustic detection beam comprising the combined detection capabilities of the sensor elements.
REFERENCES:
patent: 4068208 (1978-01-01), Rice, Jr. et al.
patent: 4231111 (1980-10-01), Neeley
Booth Newell O.
Meland Clifford L.
Farley Richard A.
Johnston Ervin F.
Sciascia Richard S.
Skarsten James O.
The United States of America as represented by the Secretary of
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