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7606113 |
Modeling sound propagation for underwater test areas
A system and method for quickly modeling the ideal acoustic sound propagation in a body of water based on current SVP data and the position of the sound source, comprising the steps of: obtaining...
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7554882 |
Methods and systems for calibrating acoustic receivers
A method for in-situ calibrating acoustic receivers while the tool is in an open or cased borehole or during a logging run in a borehole. The method and system facilitate calibrating the acoustic...
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7535794 |
Transducer surface mapping
Method for adjusting the output of a phased array ultrasonic transducer using surface mapping. The transducer surface is mapped using a sensor, such as a hydrophone, to determine the actual...
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7535793 |
Acousto-mechanical vehicle characterization system and method
A system and method for detecting concealed cargo, such as explosives contained in a closed vehicle trunk, by characterizing the transfer function between sets of wheels of the vehicle and...
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7453762 |
Apparatus and method of auto frequency calibration for transducer
An apparatus for automatically calibrating a transducer are disclosed in the present invention, the apparatus comprising: an oscillator, for generating a system frequency; a micro controller, being...
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7450474 |
Diagnostic system and method for transducers
In accordance with the illustrative embodiment, a diagnostic method for use with multi-element transducers includes determining an acoustic center of a transducer and determining an offset of the...
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7447112 |
Test method for a method for passively obtaining target parameters
A test method for a method used for passively obtaining target data regarding a moving target, wherein bearing angles are measured as real target data from the bearing of the target using an...
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7417919 |
Determination of sensor distance
Apparatus is described for accurately determining the elevation, E, of a pulse-echo ultrasonic range sensor ( 2 ) relative to a datum level ( 14 ). The figure shows vertical elevations of the...
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7394723 |
Atmospheric turbulence hazard detector
An Atmospheric Turbulence Detector utilizes a sensor to detect noise and extracts infrasound having frequencies below a specified infrasound frequency. A threshold is computed from the detection of...
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7388807 |
Method for an antenna angular calibration by relative distance measuring
The present invention relates to the angular calibration of passive reception systems such as sonars or active ones such as certain radars whose angular performance is inadequate. The invention...
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7388806 |
Mass positioning apparatus for a seismic sensor
A mass positioning apparatus for use with seismic sensors is described. The seismic sensor includes axis mechanics including a pivotable boom with a defined null point. The mass positioning...
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7385873 |
Mass positioning adjustment mechanism for a seismic sensor
A mass position adjustment apparatus for use in a seismic sensor having axis mechanics including a pivotable boom with a defined null point is described. The apparatus comprising: (a) adjustment...
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7375646 |
Seismic detection and response system
A seismic switch is a programmable device capable of distinguishing between seismic movements due to an earthquake or an explosion, which is used to send a signal to control panels for security...
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7373805 |
Apparatus for directing particles in a fluid
There is disclosed apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second,...
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7369458 |
Transducer identification
A transducer identification system provides transducer characteristic information to an echosounder. The echosounder, in turn, utilizes the transducer characteristic information to alter its...
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7353708 |
Ultrasonic generator system
The system controls the frequency of an ultrasonic signal to be applied to a waveguide, such that the frequency corresponds to a preferred resonance mode of the waveguide and not to adjacent...
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7330396 |
Farfield analysis of noise sources
An algorithm diagnoses the noise source strength distribution on an arbitrarily shaped object based on acoustic pressures measured in the far field, known as FANS. FANS enable one to acquire a...
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7330395 |
Method and system for automatically calibrating sound level meter
A method and a system for automatically calibrating a sound level meter which achieves accurate and secure calibration of a sound level meter using a sound calibrator. The sound calibrator...
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7266040 |
Active sonar simulation
An exemplary embodiment of the invention relates to a method and system for displaying simulated acoustically realistic active sonar signals. The method includes simulating a realistic sounding...
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7225662 |
Geophone calibration technique
Various techniques are described which may be used to facilitate and improve seismic exploration activities. For example, one aspect of the present invention is directed to a technique for enabling...
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7224640 |
Underwater acoustic bearing sensor
In an underwater acoustic bearing sensor, the vector sensor, heading sensor, and pitch and roll sensor are held in a common mounting ring to ensure that their coordinate systems are collinear. The...
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7213442 |
Methods of arranging transducers and transducer arrays having reduced phase ambiguity for determining direction of arrival of received signals
Method of arranging transducers, including non-coplanar interferometer antennas on the outer surface of an aircraft, to minimize phase ambiguities when determining the direction of arrival of a...
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7190633 |
Self-calibrating shooter estimation
Shockwave-only solutions that estimate shooter position and shot trajectory are extremely sensitive to the quality and precision of the shock time-of-arrival (TOA) measurements as well as the...
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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...
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7154811 |
Simulator for developing acoustic detector of underwater vehicle
A simulator for developing an acoustic detector of underwater vehicle precisely verifies performance of an acoustic detector by simulating an actual underwater environment, including target signal,...
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7085196 |
Method and apparatus for gathering seismic data
In the present invention, a seismic receiver contains an onboard digitizer that samples and converts a signal from detected seismic energy into the digital domain. The receiver contains an analog...
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7085194 |
Methods and systems for calibrating acoustic receivers
A method and system for calibrating acoustic receivers ( 112 ). The method and system facilitate calibrating the acoustic receivers ( 112 ) while they are mounted to a downhole acoustic tool ( 102...
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7007539 |
Apparatus and methods for interfacing acoustic testing apparatus with acoustic probes and systems
Methods and apparatus are provided for testing an acoustic device that has multiple transducing elements adapted for conversion between acoustic and electrical signals. An electrical transmission...
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H002146 |
Method for determining long term stability
A method of determining long term power variation, as an indication of long term stability of power output, by steps of measuring power output at successive intervals of time, determining...
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7002877 |
Method and apparatus for active sonar performance prediction
A system and method for predicting active, low-frequency sonar array performance in shallow, littoral waters using a physics-based modeling of acoustic reverberation. An operator characterizes the...
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6990419 |
System for identifying a signal source
A system for identifying a signal source in a predetermined space, the system including multiple sensing units arranged at different locations to detect signals in the predetermined space. The...
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6982925 |
Fiber-optic seismic array telemetry, system, and method
A method and system for interrogating a seismic sensor in a seismic cable having modular sensing stations spaced along the seismic cable and a connection module head end of the sensor sections,...
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6975948 |
Method of identifying a source of a signal
In a method of identifying a source of a signal, the signal is recorded and then analyzed in order to determine its spectrum. The method includes the following steps:
in parallel with...
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6909669 |
Scour detection and monitoring apparatus adapted for use in lossy soils and method of employment thereof
A sensor for detecting and monitoring scour in sediment positioned beneath a body of water, which includes a probe at least partially embedded in the sediment. Sensor electronics are superimposed...
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6909375 |
Seismic switch
A seismic switch is a programmable device capable of distinguishing between seismic movements due to an earthquake or an explosion, which is used to send a signal to control panels for security...
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6903998 |
Method for acquiring and processing seismic survey data using ocean bottom cables and streamers
A method is disclosed for marine seismic surveying in which a seismic signal is detected in a body of water with a motion sensor and a pressure sensor positioned at a location proximate the bottom...
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6901028 |
Marine seismic survey apparatus with graphical user interface and real-time quality control
A graphical user interface (GUI) and control system for marine seismic data acquisition is described along with a method of real-time quality control of the seismic survey. The control system...
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6892152 |
Method for identifying a signal source
A method for identifying a signal source in a predetermined space, the method including inventorying a set of identified signatures corresponding to a plurality of signal sources and recording a...
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6876598 |
Method for predicting propagation of sound in an ocean
Propagation of sound in an ocean is accurately predicted at all ranges from a source by a computational method that uses a newly created Decomposition Method to make the predictions at long range...
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6865137 |
Method for pulse offset calibration in time of flight ranging systems
A pulse offset calibration method for a pulse-echo level measurement system. The pulse-echo level measurement system includes a transducer for transmitting calibration acoustic pulses and receiving...
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6816434 |
Seismic detection
A method of using a seismic detector including four seismic sensors having axes which are in a substantially tetrahedral configuration, each of the sensors being in a respective signal channel,...
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6788618 |
Method and apparatus for marine source diagnostics
A graphical user interface (GUI) and control system for controlling and testing an acoustic source. The control system includes real-time data processing of individual source near-field measured...
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6775202 |
Method and a device for reproducing solid body vibrations for the prediction of fracture processes in solid bodies, particularly in the earth crust
A device for reproducing solid body vibrations for the prediction of fracture processes in a solid body, particularly in the earth crust, is provided with at least one vibration recording means for...
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6771560 |
Method and apparatus for on-board calibration in pulse-echo acoustic ranging system
A calibration module and methods for a time-of-flight ranging system. The calibration module may be built into the circuitry of the time-of-flight ranging system and allows various operating...
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6738315 |
Underwater target testing
An underwater target such as the hull of a ship is tested for its susceptibility to damage from explosive shock waves emerging from a rigid conical shell in response to detonation of an explosive...
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6683560 |
System and technique for enhanced radar object detection
A object detection system, such as a radar, and a method for improving the useful information provided thereby. The system is mounted on a vehicle for providing contact information to the vehicle...
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6671222 |
Apparatus and method for distributed control of seismic data acquisition
The present invention provides a method and apparatus of acquiring and processing seismic data. One or more controllers are each coupled to seismic sensors and to each other to form a line of data...
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6628568 |
System and method for verification of acoustic horn performance
A system and method for verification of acoustic horn performance is disclosed. This system and method includes a pressure detecting mechanism that converts at least one vibratory sound energy...
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6628567 |
System for multiplexing acoustic emission (AE) instrumentation
An acoustic monitoring device has at least two acoustic sensors with a triggering mechanism and a multiplexing circuit. After the occurrence of a triggering event at a sensor, the multiplexing...
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6618323 |
Optical axis adjusting device for vehicle headlamp
An optical axis adjusting device for a vehicle headlamp judges an inclined state of the vehicle on the basis of detection of an ultrasonic sensor of a vehicle, and performs an optical axis...
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