Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals
Reexamination Certificate
2009-06-05
2011-11-15
Lu, Shirley (Department: 2612)
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
By combining or comparing signals
C367S093000
Reexamination Certificate
active
08059487
ABSTRACT:
An underwater detection device includes a transceiver module for transmitting underwater an ultrasonic pulse signal that is frequency-modulated and receiving an echo signal corresponding to the transmitted signal, a pulse compression module for pulse-compressing the signal received by the transceiver module and outputting a signal pulse-compressed, a suppression range determining module for determining a suppression range where a range side lobe suppression process is performed for the pulse-compressed signal, an echo determining module for determining whether the data of the pulse-compressed signal at each depth corresponding to a range side lobe, a suppression value determining module for determining a suppression value for the data of the pulse-compressed signal at each depth, a suppression conducting module for performing a calculation to suppress the range side lobe based on the suppression value for the data determined to be data of the pulse-compressed signal corresponding to the range side lobe by the echo determining module among a plurality of data of the pulse-compressed signals that fall into the suppression range, and a display processing module for generating a signal for display based on the signal outputted from the suppression conducting module to display a generated signal as detected information.
REFERENCES:
patent: 5043951 (1991-08-01), Gilmour et al.
patent: 2007/0229348 (2007-10-01), O'Hora et al.
patent: 2 452 831 (2009-03-01), None
patent: 2005-249398 (2005-09-01), None
Birch & Stewart Kolasch & Birch, LLP
Furuno Electric Company Ltd.
Lu Shirley
LandOfFree
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