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7613543 |
Electronic demarcating system
A method and an electronic search system for operating an automatic device, preferably an automatic lawnmower. The system comprises at least one first electrical cable ( 1,4,5,6 ) connected to at...
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7539081 |
Seabed resource exploration system and seabed resource exploration method
A seabed resource exploration system includes: a vibrator 1 for transmitting a sound wave into the sea and receiving a scattered wave in which the sound wave is reflected on a boundary surface...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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...
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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...
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7177233 |
Synthetic sonar antenna
The invention relates to a synthetic sonar antenna and more particularly to the self-calibration of such an antenna. It consists in minimizing the number of sensors of the reception antenna by...
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7149147 |
System and method for sound detection and image using a rotocraft acoustic signature
One embodiment of the system is implemented as an aircraft comprising a rotor. For example, the aircraft may be a helicopter. This embodiment also comprises an acoustic source, wherein this...
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7133326 |
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.
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7123546 |
Processing technique for forward looking sonar
A processing technique and transducer field of view architecture for use as part of an imaging sonar system to develop three-dimensional images of the space below, to the sides, and forward of a ship.
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7072244 |
Underwater exterior ship hull imaging system employing a remote microprocessor controlled acoustic transducer array
A multi-beam acoustic transducer array system for producing color enhanced, three dimensional, high resolution images of a ship's underwater hull, wherein the acoustic transducers can be mounted in...
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7054228 |
Sound source location and quantification using arrays of vector probes
Method and apparatus for locating and quantifying sound sources using an array of acoustic vector probes ( 200 ). Signals received at the probes are converted to digital form and fed into a digital...
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7046582 |
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.
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7035166 |
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...
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6985406 |
Inteferometric synthetic sonar antenna
The invention relates to an interferometric synthetic sonar antenna. It consists in processing the signals coming from the sensors of two superimposed parallel arrays forming the reception antenna,...
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6912176 |
Active element array apparatus for displaced phase center systems
A synthetic aperture side looking sonar system which includes an array of active elements, which provide output signals in response to acoustic reflections received from a target area, during...
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6873570 |
High resolution bathymetric sonar system and measuring method for measuring the physiognomy of the seabed
A high resolution bathymetric sidescan sonar system for measuring micro-geomorphy of the sea bottom having an underwater vehicle, an underwater electronic subsystem mounted on the underwater...
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6870793 |
Automatically tracking scanning sonar
An automatically tracking scanning sonar alternately performs horizontal scanning and vertical scanning and a target lock processor calculates a predicted position of a target based on an echo...
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6868041 |
Compensation of sonar image data primarily for seabed classification
The composition of the seabed can be estimated by measuring the amplitude of echoes back-scattered from the seabed. However, the amplitude measured varies not only with the type of material present...
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6862252 |
Method and apparatus for acoustic detection of buried objects
Method and apparatus for acoustic detection, location and identification of a buried object using a source emitting bursts of sound that penetrate the ground and return echoes from the object to an...
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6829197 |
Acoustical imaging interferometer for detection of buried underwater objects
Techniques for underwater detection of fully or partially buried objects such as sea mines and underwater cables are disclosed. An acoustical camera produces three dimensional volumetric images of...
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6801474 |
Resampling sonar echo time series primarily for seabed sediment classification
This invention describes a method and system for classifying a survey area according to an attribute of the seabed. More particularly, the classification technique uses echoes recorded from sonar...
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6778468 |
Automatically tracking scanning sonar
The invention provides an ultrasonic transmit-receive apparatus which solves a false image problem caused by grating lobes and side lobes and offers high bearing resolution without increasing in...
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6778467 |
Underwater sounding apparatus
A mixer shifts the center frequency of a received signal to a baseband according to a center frequency detected by a center frequency detector or a center frequency estimated from ship speed, for...
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6738311 |
Seabed sonar matrix system
A system for sonically probing a seabed comprises at least one row ( 14 ) of transducers ( 22 ) that each can produce a sonic beam, and at least one sonic detector ( 24 ). Each transducer is...
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6714481 |
System and method for active sonar signal detection and classification
A sonar system and method are provided to extract and identify information about a particular target illuminated by an active sonar system. The present invention utilizes a Volterra Series...
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6704246 |
Sound-ranging system with submarine buoy
A method for mapping a maritime zone, in which buoys transmit and receive signals that echo off a target, and are forwarded to a processing base to determine a position and estimate a velocity of a...
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6594200 |
Synthetic aperture sonar and synthetic aperture processing method
The present invention provides a method of being able to perform fluctuation correction processing, and to accelerate a traveling speed, without reducing a range and spatial resolution. An actual...
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6549853 |
Method for determining seafloor roughness using multibeam echosounder
The present invention provides a method for determining sea floor roughness using multibeam echosounder, said method comprising providing backscatter, bathymetry and multibeam operational...
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6466891 |
System for providing an estimate of the location of an undersea object
A system is disclosed that provides. a sonar operator with the most likely range to a target of interest. The system generates and displays a contour based on ship's parameters, target parameters,...
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6449215 |
Three-dimensional imaging system for sonar system
A three-dimensional imaging system for use with a sonar system. The three-dimensional imaging system processes forward-looking sonar data, side-looking sonar data, bathymetric data, detection and...
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6438071 |
Method for producing a 3D image
Method for producing an image of a submerged object ( 3 ), e.g. a shipwreck or the sea bottom, comprising the steps of emitting acoustic waves from a first transducer toward a first chosen volume (...
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6377515 |
Synchronized sonar
According to a preferred aspect of the instant invention, there is provided a synchronized sonar apparatus that is suitable for use when multiple sonar units are used in close proximity with each...
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6310830 |
Environmentally adaptive sonar system
The vertical beamwidth of the received beam of a return signal of a sonar system is adaptively modified as a function of water depth, altitude and range. The received beam is also vertically...
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6304513 |
Method for correcting effects of an antenna interfering movements in a sonar with synthetic antenna
The invention relates to synthetic antenna sonars. It consists, in order to correct the effects of the spurious motions of the physical antenna (202) of this sonar, in simultaneously using an...
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6232913 |
Method and system for measuring radar reflectivity and doppler shift by means of a pulse radar
Characteristics of a target are measured by a radar or sonar. Pulses (101, 102, 103) are transmitted and in between (X) the transmissions of pulses a signal is received which depends on the...
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6215730 |
Side scan sonar with synthetic antenna
A synthetic-antenna side sonar device. Two transmission transducers which operate in interferrometric mode are fixed to the two ends of a physical antenna of a sonar. The forward speed of the sonar...
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6185505 |
Broad ocean bathymetric fix
A method of correcting errors in in inertial navigation system, without imposing restrictions on the ships course, utilizing bathymetric data collected during the Ocean Survey Program (OSP). As the...
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6160756 |
Seabed sonar matrix system
A system for sonically probing a seabed comprises at least one row of transducers that each can produce a sonic beam, and a corresponding row of sonic detectors. Each transducer is independently...
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