Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1984-11-13
1987-02-03
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367130, 367153, G01S 380, H04R 102
Patent
active
046412905
ABSTRACT:
A novel configuration of a low-frequency lightweight sonar system is described comprising a coaxial assembly of a transmitting transducer and a directional receiving array contained within a cigar-shaped streamlined cylindrical housing less than 1 ft. diameter which operates in the 3 to 4 kHz frequency region and achieves submarine target detection ranges in the order of 20,000 meters with a bearing accuracy within 2.degree.. The small cylindrical streamlined structural assembly results in a very great reduction in drag resistance while it is being towed underwater at high speeds as compared to conventional sonar domes which must be an order of magnitude larger in diameter to accommodate the larger conventional scanning sonar transducers which are several wavelengths in diameter at the operating frequency. The enormous reduction in drag resistance and the novel method of deployment permits the described low-frequency lightweight sonar system assembly to be pulled through the water at very high speeds by small patrol craft or helicopters to achieve very effective long-range low-cost high-speed sonar surveillance of very large areas of the sea.
REFERENCES:
patent: 1293744 (1917-05-01), Fiske
patent: 2987029 (1961-06-01), Manuel
patent: 3027539 (1962-03-01), Stillman, Jr.
patent: 3159806 (1964-12-01), Piasecki
patent: 3281767 (1966-10-01), Cryan
patent: 3372368 (1968-03-01), Dale et al.
patent: 3469229 (1969-09-01), Pure et al.
patent: 3526198 (1970-09-01), Mathes et al.
patent: 4197591 (1980-04-01), Hagemann
patent: 4198705 (1980-04-01), Massa
patent: 4305140 (1981-12-01), Massa
patent: 4305141 (1981-12-01), Massa
patent: 4473896 (1984-09-01), Loeser et al.
patent: 4538250 (1985-08-01), DeMetz et al.
Massa Donald P.
Massa Frank
Dellorfano, Jr. Fred M.
Jordan Charles T.
Massa Donald P.
Steinberger Brian S.
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