Patent ID: 7760586
Filing Date: 2010-07-20
Classification: G01S

Abstract:
1. A bottom-sediment classification device for transmitting a pulse of an ultrasonic wave from a transducer to a water bottom, and determining bottom sediment of the water bottom based on water-bottom echo signals received by the transducer, the device comprising: a transmitting module configured to transmit the pulse of the ultrasonic wave, the pulse having a pulse width corresponding to a water-bottom depth; an extracting module configured to extract a series of amplitude data of the water-bottom echo signals from predetermined echo signals among the received water-bottom echo signals at a predetermined time interval; a normalizing module configured to normalize the series of amplitude data extracted by the extracting module a gain compensation module configured to TVG-process the extracted series of amplitude data; a feature quantity calculating module configured to calculate two or more feature quantities based on the normalized series of amplitude data in each of segments of the normalized series of amplitude data, and a value corresponding to the water-bottom depth; and a generating module configured to generate bottom-sediment classification information indicating the bottom sediment based on the two or more feature quantities.