Linear and circular downscan imaging sonar
DC CAFCFirst Claim
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1. A method comprising:
- receiving linear downscan sonar data based on sonar returns from a series of fan-shaped beams produced sequentially by a linear downscan transducer mounted on a watercraft, the series of fan-shaped beams insonifying different fan-shaped regions of an underwater environment beneath the watercraft as the watercraft travels;
receiving conical downscan sonar data based on sonar returns from a generally conical beam produced by a second downscan transducer, wherein the conical beam is wider than each fan-shaped beam in a direction parallel to a longitudinal length of the linear downscan transducer;
combining the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data; and
rendering the combined downscan sonar data as at least one image on a display, the at least one image including a composite of images of the fan-shaped regions arranged in a progressive order corresponding to the travel of the watercraft.
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Abstract
A method for providing a combined linear and circular downscan sonar display may include receiving linear downscan sonar data from a linear downscan transducer, receiving conical downscan sonar data from a circular downscan transducer, and combining the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data. A corresponding computer program product and apparatus are also provided.
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Citations
81 Claims
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1. A method comprising:
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receiving linear downscan sonar data based on sonar returns from a series of fan-shaped beams produced sequentially by a linear downscan transducer mounted on a watercraft, the series of fan-shaped beams insonifying different fan-shaped regions of an underwater environment beneath the watercraft as the watercraft travels; receiving conical downscan sonar data based on sonar returns from a generally conical beam produced by a second downscan transducer, wherein the conical beam is wider than each fan-shaped beam in a direction parallel to a longitudinal length of the linear downscan transducer; combining the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data; and rendering the combined downscan sonar data as at least one image on a display, the at least one image including a composite of images of the fan-shaped regions arranged in a progressive order corresponding to the travel of the watercraft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A computer program product comprising at least one non-transitory computer-readable storage medium having computer-executable program code portions stored therein, the computer-executable program code portions comprising:
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program code instructions for receiving linear downscan sonar data based on sonar returns from a series of fan-shaped beams produced sequentially by a linear downscan transducer mounted on a watercraft, the series of fan-shaped beams insonifying different fan-shaped regions of an underwater environment beneath the watercraft as the watercraft travels; program code instructions for receiving conical downscan sonar data based on sonar returns from a generally conical beam produced by a second downscan transducer, wherein the conical beam is wider than each fan-shaped beam in a direction parallel to a longitudinal length of the linear downscan transducer; program code instructions for combining the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data; and program code instructions for rendering the combined downscan sonar data as at least one image on a display, the at least one image including a composite of images of the fan-shaped regions arranged in a progressive order corresponding to the travel of the watercraft. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An apparatus comprising a sonar signal processor configured to:
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receive linear downscan sonar data based on sonar returns from a series of fan-shaped beams produced sequentially by a linear downscan transducer mounted on a watercraft, the series of fan-shaped beams insonifying different fan-shaped regions of an underwater environment beneath the watercraft as the watercraft travels; receive conical downscan sonar data based on sonar returns from a generally conical beam produced by a second downscan transducer, wherein the conical beam is wider than each fan-shaped beam in a direction parallel to a longitudinal length of the linear downscan transducer; combine the linear downscan sonar data and the conical downscan sonar data to produce combined downscan sonar data; and render the combined downscan sonar data as at least one image on a display, the at least one image including a composite of images of the fan-shaped regions arranged in a progressive order corresponding to the travel of the watercraft. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81)
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Specification