Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Patent
1985-03-26
1987-01-06
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Speed determination
367100, 367106, 181123, G01S 966, G01S 968, G01S 1500
Patent
active
046352406
ABSTRACT:
A forward look sonar system in which speed and direction of a sonar platform is obtained. Each acoustic transmission towards the target area over which the platform is traveling is comprised of a plurality of frequencies. A plurality of receiver beams is formed and each individual beam from one transmission is cross-correlated with its corresponding beam from a selected subsequent transmission to derive a delay value. The later received signal for each beam, for each frequency is divided into a plurality of small segments each of which is cross-correlated with a portion of the first return signal corresponding to the same frequency and beam. The cross-correlation functions for the plurality of frequencies for each particular segment are added together to obtain a more precise delay value. The correlation functions for each of the beams are added together and compared to derive a value for platform direction in the intercomparison period and the delay values are utilized to derive a velocity indication.
REFERENCES:
patent: 3119189 (1964-01-01), Hyne
patent: 3147477 (1964-09-01), Dickey, Jr.
patent: 3274546 (1966-09-01), Gunn
patent: 4025895 (1977-05-01), Shatto
patent: 4047147 (1977-09-01), Wood et al.
patent: 4162474 (1979-07-01), Broder et al.
patent: 4216537 (1980-08-01), Delignieres
patent: 4244026 (1981-01-01), Dickey, Jr.
patent: 4480322 (1984-10-01), Orieux
patent: 4493064 (1985-01-01), Odero et al.
Allen Charles W.
Geohegan, Jr. Kenneth P.
Jordan Charles T.
Schron D.
Steinberger Brian S.
Westinghouse Electric Corp.
LandOfFree
Sonar navigation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sonar navigation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sonar navigation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-689121