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| Number | Title | Issue Date |
| 8189428 | Methods and systems to detect changes in multiple-frequency band sonar data Methods and systems to detect changes in a region of space relative to baseline measurements, including to process data to detect potential objects, or contacts against a natural background environment, to characterize and geo-register the contacts, to compare and c... | 05/29/2012 |
| 8154952 | Method and system for real-time automated change detection and classification for images A computer based system and method for real-time display of co-registered historical and current side scan sonar imagery during a side scan sonar survey. Embodiments also include modules for detection of clutter in the current imagery, identification of features, ex... | 04/10/2012 |
| 8085618 | Sonar with deformable, flexible antenna and associated method of signal processing to form a synthetic antenna A sonar system includes at least one transmitter and one flexible antenna including a plurality of sections articulated one after the other, each section being provided with at least one acoustic receiver. The system is equipped with positioning elements making it p... | 12/27/2011 |
| 8077549 | Frontal sonar Frontal sonar for observing the seafloor, characterized in that it includes: elements for insonifying a seafloor area divided into M sectors, able to perform a characteristic insonification of each sector of the area during an operation recurrence of the sonar; and ... | 12/13/2011 |
| 8077548 | Multibeam sounder The sounder according to the invention comprises two transmit-receive antennas (1, 10) whose respective axes are off-target toward the front, in the direction of movement of the platform, these axes being symmetrical relative to a straight line (3) pas... | 12/13/2011 |
| 8059486 | Method of rendering volume representation of sonar images Sonar imaging data is reduced by assigning partially reflective and/or opaque two dimensional areas for each data point to a series of planes. The reflectivity and/or transmission of light from the areas is calculated and used to construct an image. ... | 11/15/2011 |
| 8009512 | Networked sonar observation of selected seabed environments A sonar transducer network for observing a seabed includes a controller. A first transducer assembly includes a first acoustic transducer to convert a first ping to a first electrical signal; and a first transducer processor to receive a first electrical signal from... | 08/30/2011 |
| 7990804 | Method and system for real-time automated change detection and classification for images A computer based system and method for real-time display of co-registered historical and current side scan sonar imagery during a side scan sonar survey. Embodiments also include modules for detection of clutter in the current imagery, identification of features, ex... | 08/02/2011 |
| 7933167 | Sonar imaging system with a synthetic aperture A synthetic antenna sonar system, includes: a sonar provided with emission elements and reception elements, the reception elements including a composite physical antenna having N transducers, the sonar being located on a mobile car... | 04/26/2011 |
| 7760586 | Bottom-sediment classification device and method A device and method for determining bottom sediment is provided. The method includes transmitting a pulse of a pulse width corresponding to a water-bottom depth, extracting a series of amplitude data of water-bottom echo signals from predetermined signals among the ... | 07/20/2010 |
| 7755974 | Side scan sonar imaging system with enhancement A system for use with a boat to provide underwater sonar images, includes a left side scan sonar transducer for transmitting left side scan sonar pulses and for receiving left side scan sonar return signals, a right side scan sonar transducer for transmitting right ... | 07/13/2010 |
| 7751281 | Detection of bured objects using an array of non-contact ultrasonic vibrometers Acoustic apparatus and method for detecting and identifying near-surface buried objects using a non-contact array of ultrasonic vibrometers (200) each vibrometer having a focused beam in air (400) pointing vertically at the ground. Also there is a low-... | 07/06/2010 |
| 7729203 | Side scan sonar imaging system with associated GPS data A system for use with a boat to provide underwater sonar images includes a GPS receiver for providing GPS position data, a left side scan sonar transducer for transmitting left side scan sonar pulses and for receiving left side scan sonar return signals, and a right... | 06/01/2010 |
| 7688675 | Underwater biomass assessment device and method A system for assessing underwater biomass that comprises a frame that can float and hold the system on a body of water; a transducer that emits and receives wave signals; a motor box, that positions the transducer below a water line; a control unit to allow a user t... | 03/30/2010 |
| 7679995 | Networked sonar observation of selected seabed environments A sonar transducer network for observing a seabed includes a controller. A first transducer assembly includes a first acoustic transducer to convert a first ping to a first electrical signal; and a first transducer processor to receive a first electrical signal from... | 03/16/2010 |
| 7652952 | Sonar imaging system for mounting to watercraft A sonar imaging system for a watercraft is disclosed. The sonar imaging system comprises a transducer coupled to the watercraft and having at least one side scanning element and at least one bottom scanning element, an electronic control head unit coupled to the tra... | 01/26/2010 |
| 7532541 | Object detection using acoustic imaging Embodiments of the present invention include methods and apparatus for the detection of objects using acoustic imaging. Vibrational resonance characteristics of man-made objects may be significantly different from those of the surrounding natural materials, allowing... | 05/12/2009 |
| 7466628 | Method of constructing mathematical representations of objects from reflected sonar signals Data recorded by directing a single sonar beam pulse towards a surface, and recording the reflected sonar signals with a large plurality of detectors, is used to generate a mathematical representation of the surface. The mathematical representation of the surface is... | 12/16/2008 |
| 7457196 | Networked sonar observation of selected seabed environments A sonar transducer network for observing a seabed includes a controller. A first transducer assembly includes a first acoustic transducer to convert a first ping to a first electrical signal; and a first transducer processor to receive a first electrical signal from... | 11/25/2008 |
| 7417921 | Method for classifying a type of bottom, measuring device and computer program product for carrying out such a method A method for classifying a type of bottom on a bottom under a liquid includes the steps of performing an acoustic reflection measurement, in which a first attribute is determined which represents a strength with which acoustic waves are reflected from a location on ... | 08/26/2008 |
| 7369459 | Forward-looking sonar and underwater image display system A forward-looking sonar includes a transducer array which is divided into a first sub array and a second sub array, a first beamforming section for forming a first receiving beam with the first sub array, and a second beamforming section for forming a second receivi... | 05/06/2008 |
| 7355925 | Signal-processing method and active sonar implementing same The invention relates to the field of underwater acoustics and more particularly to the field of signal processing in a low frequency (LF) active sonar system. The present invention makes it possible to decrease the false alarm rate while retaining the classi... | 04/08/2008 |
| 7355924 | 3-D forward looking sonar with fixed frame of reference for navigation An imaging sonar system develops three-dimensional images of the space below, to the sides, and forward of a ship relative to a fixed frame of reference. Various features permit the system to be used in non-military environments and make possible low cost with subst... | 04/08/2008 |
| 7342847 | Method of estimating along-track displacement of an underwater vehicle A method is provided for along-track displacement of an underwater vehicle equipped with a synthetic aperture sonar (SAS) system. The SAS system is operated as the vehicle moves through the water. Using successively-detected acoustic signals, an actual redundant pha... | 03/11/2008 |
| 7317417 | Methods for detection and tracking of targets The present invention relates to active sensor applications, and more particularly is directed to efficient systems and methods for detection and tracking of one or more targets. The invention provides a method for receiving signals reflected from one or more target... | 01/08/2008 |
| 7315487 | Method of signal processing for high resolution bathymetric sidescan sonar A processing method of this invention relates to an angle of arrival estimation technique, where by a high resolution bathymetric sidescan sonar signal process method it measure the micro-geomorphy of the sea bottom. That is the multi-subarray sub-space fitting meth... | 01/01/2008 |
| 7315485 | System and method for target classification and clutter rejection in low-resolution imagery A system and method of determining a classification of at least one underwater object is provided. The method includes generating at least one low-resolution imagery of an object from a plurality of frequencies produced by a detection device and extracting at least ... | 01/01/2008 |
| 7301851 | Underway hull survey system A method and survey system for inspecting hulls of ships has a base portion and side portions defining an inspection channel in water. Sonar is mounted on the side portions transmitting acoustic signals onto a hull as a ship passes through the inspection channel, re... | 11/27/2007 |
| 7272072 | Method of converting received data to a two-dimensional color map Beams of sampled data are converted into a two-dimensional color map thereof. Fourier transforms are performed on range cells of each beam with each transform being sampled M times where M is defined by M discrete sets of red, green and blue intensity values of a co... | 09/18/2007 |
| 7268703 | Methods, systems, and devices for cartographic alerts Systems, devices, and methods are provided for marine navigation and course calculation for avoiding preselected conditions. An electronic marine navigation device with marine course calculation capabilities includes a processor connected to a memory that includes c... | 09/11/2007 |
| 7264500 | Portable electronic apparatus with battery engaging terminal A portable electronic apparatus comprises a frame having a recessed portion for receiving a battery. The recessed portion has a bottom portion that has an upper surface on which the battery seats. A circuit board is disposed beneath the frame and has two locking hol... | 09/04/2007 |
| 7245557 | Sonar A sonar emits an ultrasonic wave into the water from a transducer on the basis of a transmission signal outputted from a transmission circuit, receives an echo reflected in the water with the transducer and converts the echo into an electric signal, and displays und... | 07/17/2007 |
| 7242638 | Method and system for synthetic aperture sonar A method and system for synthetic aperture sonar provide improved position estimates of a receive array as in moves through a body of water. ... | 07/10/2007 |
| 7242819 | Method and system for advanced edge-adaptive interpolation for interlace-to-progressive conversion An improved method and system for edge adaptive interpolation. The method uses a “9×2” window to detect the edge direction with post-processing to remove any artifacts due to the possible false edge detection, and a hierarchical scheme is employed to reduce the... | 07/10/2007 |
| 7239263 | Platform shake compensation method in synthetic aperture processing system The present information comprises the stages of: applying frequency analysis to positional information on a platform, generating virtual positional information on the platform based on a frequency analysis result; extracting a signal based on the generated virtual p... | 07/03/2007 |
| 7236426 | Integrated mapping and audio systems An integrated position mapping system and an integrated sonar mapping system both permit recording, storage and playback of audio data. Audio data is provided to the integrated sonar mapping system or the integrated position mapping system so that it may be correlat... | 06/26/2007 |
| 7221621 | System and method for identification and quantification of sonar targets in a liquid medium A system and method for identifying and quantifying targets within a liquid medium. A raw sidescan sonar image is collected. A region of interest is separated from the image. An image transformation is performed using an extraction algorithm. Salient image character... | 05/22/2007 |
| 7215598 | Imaging sonar and detection system using such a sonar The disclosure relates to an imaging sonar for detection of objects buried in a reflecting medium, comprising a “vertical” transmit antenna and a horizontal receive antenna forming a “Mills Cross”, said transmission means enabling a vertical radiation angle ... | 05/08/2007 |
| 7212466 | Producing amplitude values for controlling pixel illumination on a sonar display A method and apparatus for producing an amplitude value for use in controlling illumination of a pixel on a display, in response to a sampled sonar signal produced by an element of a sonar array. A pixel time associated with the pixel is found, the pixel time repres... | 05/01/2007 |
| 7187619 | Method and apparatus for high-frequency passive sonar performance prediction A system and method for predicting passive, high-frequency sonar array performance at any underwater location, implemented as a software package running on a computer. An operator selects an arbitrary geographical location, specifies a sonar array and defines a targ... | 03/06/2007 |
