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7586810 |
Directional de-signature for seismic signals
The present invention provides a method and apparatus for directional de-signature of a seismic signal. The method includes forming a plurality of far-field signatures representative of a plurality...
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7502279 |
Target direction indication and acoustic pulse analysis
A method of providing an indication of the direction of a target such as a sniper. A rifle mounted sensor array detects an acoustic pulse originating from the target. The signal is processed to...
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7471592 |
Method and apparatus for passive acoustic ranging
An apparatus for range-estimating a noise source including a first passive, vertical hydrophone array of at least two receivers at a first distance from the noise source. The apparatus includes a...
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7471243 |
Location determination utilizing environmental factors
A method and apparatus for determining the geographic location of a user incorporates the sensing of a plurality of physical environmental parameters at the user's location. The parameter values...
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7463554 |
Method of detecting and viewing low-power moving acoustic sources
The inventive method relates to the field of submarine detection and deals in particular with the problem of detecting low-power acoustic underwater objects by passive detection systems, of the...
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7430236 |
Communication interface for a path measuring device
A communication interface for a path measuring device is provided. The interface can be coupled between the path measuring device and a control device. A path determination can be carried out by...
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7408125 |
Fish scale and length measuring sensor
A fish length measuring apparatus that incorporates a digital scale allows fishermen to both measure and weigh their catch without touching or handling the fish. The apparatus incorporates a...
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7395181 |
Motion tracking system
Tracking a motion of a body by obtaining two types of measurements associated with the motion of the body, one of the types including acoustic measurement. An estimate of either an orientation or a...
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7390379 |
Method and apparatus for determining the lateral position of a web or fabric edge in a former
The lateral position of a web or fabric edge 11 in a paper machine is determined using an ultrasonic sensor. The ultrasonic sensor has a detector head 42 , with an air channel system which opens...
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7382687 |
Underwater station
An underwater station including: a transmitter means located on a flotation means connected to the station, and a tracking means to determine the relative location of the flotation means.
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7379388 |
Positioning system
A system to position at least one vessel or object in an aquatic environment including: each vessel or object having a receiver connected thereto; and at least two transmitters; wherein each...
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7372773 |
Method and system of providing clustered networks of bearing-measuring sensors
System and method for determining a location of a first target. The sensor network comprises a first sensor cluster comprising a first plurality of bearing measuring sensors. A first gateway is...
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7359285 |
Systems and methods for determining shooter locations with weak muzzle detection
Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for...
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7336563 |
Method and system for increased update rate in acoustic positioning
A method for obtaining an increased update rate in an indoor acoustic positioning system for determining the position of one or more identification tags, comprising transmitting from an...
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7319640 |
Noise suppression system
A method and apparatus is provided for suppressing noise which includes receiving a plurality of signals from an array of sensors and transforming each of these signals to the frequency domain. The...
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7307914 |
Hypothesized range and depth sonar processing method
A method for determining the likely range and depth of an acoustically radiating source in which characteristics are used from hypothetical ranges and depths. A received sonar signal is compared...
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7307537 |
Identification tag
The invention relates to an identification chip for insertion in an object located in a liquid. The identification chip comprises an acoustic resonator ( 100 ), which exhibits a number of distinct...
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7304912 |
Scale adaptive filtering
A scale adaptive filtering scheme is developed for underspread channels based on a model of the linear time varying channel operator as a process in scale. Recursions serve the purpose of adding...
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7292501 |
Compact shooter localization system and method
Systems and methods for locating the shooter of supersonic projectiles are described. Muzzle blast signals are neither sought nor required. The system uses at least two sensors, with each sensor...
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7283424 |
High speed underwater projectile tracking system and method
A system and a method are provided to accurately track the trajectory of high-speed underwater objects. A number of hoops with means for controlling the buoyancy thereof are aligned on a range in...
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7280434 |
Method, medium, and apparatus for global localization
A global localization apparatus, medium, and method, with the global localization method including selecting one from a plurality of samples and shifting the selected sample according to a movement...
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7266042 |
Multi-stage maximum likelihood target estimator
A multi-stage maximum likelihood target estimator for use with radar and sonar systems is provided. The estimator is a software implemented algorithm having four computational stages. The first...
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7263373 |
Sound-based proximity detector
A proximity detector for use in a mobile telephone having at least a microphone and a loudspeaker operatively connected to a signal processor is presented. The proximity detector includes data...
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7161873 |
Method of detecting and locating a source of partial discharge in an electrical apparatus
A method of detecting and localizing a source of partial discharge in an electrical apparatus placed in an enclosure containing an acoustically-conductive fluid. The method consists in:
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7151480 |
Method and system of triangulating an object
A method and a system of triangulating an object by means of at least two sensors. Each sensor is placed in a respective local reference system. Each of the at least two sensors at least provide a...
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7126876 |
Harmonic ambiguity resolver and inter array harmonic tracker
The present application discloses a method for resolving harmonic ambiguity and inter-array harmonic tracking. The method allows derivation of a complete set of possible harmonic families given the...
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7109918 |
Nonlinear beam forming and beam shaping aperture system
This invention exploits the synchronization properties of coupled, nonlinear oscillators arrays to perform power combining, beam steering, and beam shaping. This architecture utilizes interactions...
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7098579 |
Transmitting apparatus, sound sensor and autonomous traveling vehicle
A driving circuit of a transmitting apparatus drives a piezoelectric element in a frequency band different from a resonance frequency at which a vibration system including the piezoelectric element...
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7031224 |
Buoy-to-sailboat distance indicator system
This system is intended for use during a regatta to indicate the distance between a sailboat and a race course marker buoy being rounded as part of the race. The system involves a transmitter on...
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7020046 |
System and method for target motion analysis with intelligent parameter evaluation plot
An underwater target tracking capability is disclosed for a grid-search technique utilizing parameter evaluation plot techniques comprising processing acoustic sonar measurements in conjunction...
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6980486 |
Acquisition system particularly suited for tracking targets having high bearing rates
An apparatus for a bearing tracker is disclosed that provides improved estimates of target's bearing, bearing rate and signal-to-noise (SNR). The estimates are computed using normalized beam...
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6965541 |
Gun shot digital imaging system
Disclosed is a method for recording one or more images of a source area where an impulse sound has initiated. The recording is performed by at least one of a plurality of units that include a...
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6954535 |
Method and adapting a hearing aid, and hearing aid with a directional microphone arrangement for implementing the method
In a method for adapting a hearing aid, and a hearing aid arrangement for improving the directivity of a hearing aid with a number of microphones that are connected to one another for generating a...
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6847896 |
Seismic data acquisition method and apparatus
A method of acquiring seismic data adapted for a land or transition zone environment including placing a location identifier in a particular location, placing a seismic sensor near the location...
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6707760 |
Projectile sonar
Shells fired from the gun of a ship create an underwater explosion that is used to drive a sonar system. Sonobuoys [ 201 ] and/or a ship-towed array measure acoustic signals caused by the...
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6680688 |
Measuring system and method for detecting object distance by transmitted media with different wave velocities
A measuring system and method of detecting an object distance by transmission media with different wave velocities are described. The measuring system has a computer, a primary detector and a...
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6667709 |
Method and apparatus for detecting leaks in buried pipes by using a selected combination of geophysical instruments
A method and apparatus for detecting and locating leaks in buried pipes is disclosed in which ground penetrating radar, induction, acoustic, and vacuum excavation systems are selected based on soil...
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6549627 |
Generating calibration signals for an adaptive beamformer
A beamformer is calibrated for use as an acoustic echo canceler in a hands-free communications environment having a loudspeaker and a plurality of microphones. To perform the calibration, a number...
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6525994 |
Tracking system and method of operation thereof
A method and apparatus for detecting, processing and tracking sonar signals to provide bearing, range and depth information that locates an object in three-dimensions underwater space. A Twenty Six...
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6501704 |
Underwater object positioning system
An underwater object positioning system comprises a workboat, an acoustic transmitter-receiver mounted on the workboat, first and second surface tow units towed by the workboat, an acoustic...
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6473363 |
Sonar direction finding
A method of determining the bearing of a source of a sonar signal comprising determining the phase of a cyclic variation of the output signal of a sonar detector having a directional characteristic...
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6418082 |
Bottom moored and tethered sensors for sensing amplitude and direction of pressure waves
A bottom moored and tethered directional frequency analysis and ranging (DIFAR) sensor system deployable in a wide range of water depths. The system includes a mooring platform for anchoring the...
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6414745 |
Method and apparatus for determining the relative height of two targets
An apparatus for determining the relative height between two targets is disclosed. The present invention also discloses a method for determining the relative height between two targets; the method...
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6385130 |
Dual channel switch with frequency band limiting
An acoustic switch, having a predetermined frequency response, is disclosed that allows for a single channel device to be interconnected to multiple transducers. The acoustic switch ensures that...
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6353578 |
Phase alignment for vector and coherent signal processing
The invention involves a computationally simple and fast method for aligning the phases of complex signals (real (in phase) and imaginary (quadrature) components) before performing a coherent (in...
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6328697 |
Capacitive micromachined ultrasonic transducers with improved capacitive response
An ultrasonic transducer is formed by a plurality of cMUT cells, each has a charged diaphragm plate capacitively opposing an oppositely charged base plate. The diaphragm plate is distended toward...
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6328696 |
Bias charge regulator for capacitive micromachined ultrasonic transducers
An ultrasonic transducer is formed by a plurality of cMUT cells, each comprising a charged diaphragm plate capacitively opposing an oppositely charged base plate. A feedback controlled bias charge...
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6288973 |
Sensor systems
An acoustic sensor system for the detection, location and classification of sound-generating targets, such as helicopters, from a ship includes a base station aboard the ship, having a radio...
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6278655 |
Fault location toning method for submarine networks
A method of locating a submarine cable includes the steps of transmitting a toning signal along the submarine cable, the toning signal being a superposition of a first signal waveform to be...
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6272072 |
Underwater communication method, device, and system utilizing a doppler frequency shift
An underwater communication method, device, and system that enables bi-directional communication between and among under-water divers. In accordance with the present invention, messages may be...
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