Sonar apparatus, target velocity display method, and non-transitory medium
AssigneeNEC Corporation
InventorHisashi Shiba
Life of this patent
Estimating the term…
Abstract
A processor of a sonar system extracts a signal in a predetermined time range from a signal received by an acoustic array, calculates a correlation value for a signal waveform extracted, detects a peak value of the correlation value, calculates an integrated value by performing time-integration of a square of the correlation value, obtains a target velocity based on the peak value and the integrated value, and displays the target velocity on a display apparatus.
Claims20
A sonar apparatus comprising:
- a processor in circuit communication to an acoustic array and a display apparatus;
- and
- a memory storing program instructions executable by the processor,
- wherein the processor, when executing the program instructions stored in the memory:
- extracts one or more signal waveforms in a predetermined time range from a signal received by the acoustic array;
- calculates a correlation value of the one or more signal waveforms that has been extracted;
- detects a peak value of the correlation value;
- calculates an integrated value by performing time-integration of a square of the correlation value;
- derives a target velocity, based on the peak value and the integrated value;
- and
- displays the target velocity on a display apparatus.
A computer-implemented target velocity display method, comprising:
- extracting, by a processor, one or more signal waveforms in a predetermined time range from a signal received by the acoustic array;
- calculating, by the processor, a correlation value of the one or more signal waveforms that has been extracted;
- detecting, by the processor, a peak value of the correlation value;
- calculating, by the processor, an integrated value by performing time-integration of a square of the correlation value;
- and
- deriving, by the processor, a target velocity based on the peak value and the integrated value, to display the target velocity on a display apparatus.
A non-transitory computer-readable medium storing thereon a program that when executed by a processor causes the processor to execute processing comprising:
- extracting one or more signal waveforms in a predetermined time range from a signal received by the acoustic array;
- calculating a correlation value of the one or more signal waveforms that has been extracted;
- detecting a peak value of the correlation value;
- calculating an integrated value by performing time-integration of a square of the correlation value;
- and
- deriving a target velocity based on the peak value and the integrated value, to display the target velocity on a display apparatus.
Dependencies are inferred from the claim text.