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Patent No. 6650315

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Class 367/89 - Speed determination


Subclass of Class 367 - Communications, electrical: acoustic wave systems and devices
Definition: Subject matter for determining the rate of change of distance
No. of patents: 92
Last issue date: 03/13/2012


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NumberTitleIssue Date
8134887Directional acoustic density sensor
The invention as disclosed is a fiber optic interferometric directional acoustic density sensor that increases the directionality of a vector sensor that is much smaller in size than the wave length of an acoustic wave. This is accomplished through the use of second...
03/13/2012
8130592Correlation method for SONAR or RADAR
A method for improving the accuracy of velocity-measuring spatial correlation SONAR or RADAR is disclosed. The method uses data from multiple receiver pairs for each velocity vector, thereby providing improved utilization of a fixed sized receiver array. ...
03/06/2012
8004934Spatial correlation sonar method for high ships speeds
In an embodiment, a process measures a velocity of a vessel using a spatial correlation sonar hydrophone array. The process includes the step of selecting a correlation time such that a correlation occurs between an early pulse and a later pulse on a first hydrophon...
08/23/2011
7778111Methods and systems for underwater navigation
A method for navigating underwater is disclosed. The method uses a navigation system to project a first velocity measurement along one or more signal beams having a second velocity measurement, where the second velocity measurement is related to at least one of the ...
08/17/2010
7768874System and method of horizontal wave measurement
A system and method of horizontal wave measurement is disclosed. The system for measuring the directional spectrum of waves in a fluid medium having a substantially planar surface may include a sonar system having a plurality of transducers for generating respective...
08/03/2010
7768873Combined spatial-temporal correlation SONAR
A system is disclosed that provides a sonar system featuring combined spatial and temporal correlation array processing. The disclosed system merges spatial-based velocity errors with temporal-based velocity errors by using a combining algorithm that is based on the...
08/03/2010
7606113Modeling 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 SVP data for the body of water; determining a depth of a sound source ...
10/20/2009
7525875Method for all ocean-terrain ships covert velocity reference
Methods for mitigating errors in velocity estimates obtained from correlation SONARs when the SONARs are operated over irregular ocean-bottom terrain are disclosed. ...
04/28/2009
7495996Method for improved sonar velocity processing
A method of estimating velocity with a correlation SONAR that provides improved velocity estimate due to a reduction in random and bias errors is disclosed. The method generates a velocity estimate based on a weighted average of pulse-pairs that includes processing ...
02/24/2009
7379387System and method of horizontal wave measurement
A system and method of horizontal wave measurement is disclosed. The system for measuring the directional spectrum of waves in a fluid medium having a substantially planar surface may include a sonar system having a plurality of transducers for generating respective...
05/27/2008
73559243-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
7317659Measurement of air characteristics in the lower atmosphere
Sodar systems and methods for acoustically sounding air are disclosed in which chirps longer than 300 ms—and preferably with durations of tens of seconds—are used along with matched filter and/or Fourier processing methods to derive phase signals indicative of a...
01/08/2008
7295492Method and apparatus for correlation sonar
A correlation SONAR that provides improved velocity estimates due to a reduction in random and bias errors is disclosed. Rather than basing the velocity estimate on a single set of primary receiver pairs, one or more additional velocity estimates are generated based...
11/13/2007
7291108Ultrasonic transmission/reception apparatus for generating an image based on ultrasonic echoes and vibro-acoustic sounds
An ultrasonic transmission/reception apparatus which can image both a minute tissue around a bone part in an object and a minute tissue inside the bone, at a high resolution. The apparatus includes a system control unit which controls the synthesizers so that a firs...
11/06/2007
7248962System for influencing the speed of a motor vehicle
System for evaluating the traffic environment of a motor vehicle and for influencing the speed of the motor vehicle in its own traffic lane, comprising an electronic control unit, which is connected to a signal transmitter that produces a signal characteristic of th...
07/24/2007
7194390Predictor of minimal noise figure for wideband amplifier
A predictor allows the computation of the greatest lower bound of the noise figure pertaining uniformly over the operating band of a wideband amplifier. This computation is done directly from noise-parameter data of the amplifier. ...
03/20/2007
7187320Matched maneuver detector
A target tracking arrangement predicts the state of a target. The predictor may be a Kalman filter. In the presence of a target which is maneuvering, the prediction may be in error. A maneuver detector is coupled to receive residuals representing the difference betw...
03/06/2007
7178408Sodar sounding of the lower atmosphere
A method and system for acoustically sounding the lower atmosphere involves the transmitting of an acoustic chirp and the processing of returned echoes and interference using wavelet and matched filter techniques. A single transmitter and four receivers may be used,...
02/20/2007
7161871Method for determining ocean current and associated device
The invention relates to a method for determining ocean current using geophysical data acquisition means which are on board a ship, said ship towing at least one streamer which is equipped with at least one traction sensor and position measuring means. The invention...
01/09/2007
7133327Method and system for measuring the velocity of a vessel relative to the bottom using velocity measuring correlation sonar
A method and a system for measuring the velocity of a vessel relative to the bottom using a velocity measuring correlation sonar are disclosed. The present invention provides a new theoretical expression for the bottom medium sonar array temporal and spatial correla...
11/07/2006
7123544Assembly and method for determining speed of a supercavitating underwater vehicle
An assembly for determining speed of a supercavitating underwater vehicle during underwater travel includes a fin mounted on the vehicle aft of a cavitator portion of the vehicle and adapted to be extended outwardly beyond a hull of the vehicle and through a boundar...
10/17/2006
7095359Method of observing sea ice
An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne SAR are synchronously performed, a correlation between a draft profi...
08/22/2006
7058555Predictor for optimal selective power transfer
A predictor for optimal transducer power gain computes the maximum transducer power gain attainable by a lossless matching network for a given load operating over selected non-overlapping (disjoint) sub-bands within a frequency band of operation. ...
06/06/2006
70351663-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...
04/25/2006
7030806Time domain radio transmission system
A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmi...
04/18/2006
6942619Ultrasound radiation device
An ultrasound radiation device comprises a piezoelectric substrate, an interdigital arrangement of two comb-shaped electrodes formed on an upper end surface of the piezoelectric substrate, a counter electrode formed on a lower end surface of the piezoelectric substr...
09/13/2005
6941196Modified three lobe search method
A method of finding a vertical velocity of a vehicle by first forming two cost functions from three pulse return times. An independently determined approximate vertical velocity and a Fletcher-Powell estimation technique are used on the first cost function, to selec...
09/06/2005
6859659Estimation of vector velocity
A method and apparatus are provided for estimating the velocity vector of a remotely sensed object or group of objects using either ultrasound or electromagnetic radiation. The movement of the object is determined by emitting and receiving a pulsed field with spatia...
02/22/2005
6850186System for determining position and velocity of targets from signals scattered by the targets
The present invention relates to a system for using signals scattered by targets to determine position and velocity for each of the targets and comprises a set of transmitters and receivers of electromagnetic or acoustic signals, said transmitters and receivers disp...
02/01/2005
6804167Bi-directional temporal correlation SONAR
A temporal correlation SONAR calculates the velocity and position of a water navigable craft. A first pulse and a second set of pulses are transmitted towards an ocean bottom. A tetrad of hydrophones on the craft receives echoes of the pulses. A correlation between ...
10/12/2004
6738312Arrangement and method for measuring the speed of sound
The invention relates to an arrangement for measuring the speed of sound, the arrangement comprising: an electrical pulse generating means (402) for generating an output electrical pulse signal (404), a transmitting transducer (403) for converti...
05/18/2004
6725076Vector velocity estimation using directional beam forming and cross correlation
The two-dimensional velocity vector using a pulsed ultrasound field can be determined with the invention. The method uses a focused ultrasound field along the velocity direction for probing the moving medium under investigation. Several pulses are emitted and the fo...
04/20/2004
6714482Acoustic doppler channel flow measurement system
An improved acoustic Doppler flow measurement system which employs multiple acoustic frequencies to acquire multiple independent backscatter data from the flow channel, combining the data to enable survey measurement of channel flow properties beyond what can be ach...
03/30/2004
6678208Range computations for correlation speed sensor
A time difference between two similar but time-shifted signals is determined using a difference function. For example, similar but time-shifted first and second signals are sampled to generate a discrete mathematical function whose discrete sample points ...
01/13/2004
6671225Correlation speed sensor
A relative speed of an object is determined by monitoring random reflective surfaces in water. The system includes a first and second transmitter-receiver pair for producing echo signals of a monitored region. The monitoring pair of transducers are prefer...
12/30/2003
6614719Ultrasonic doppler effect speed measurement
An ultrasound transducer is coupled to a transmitter having a source of ultrasound signal. A receiving ultrasound transducer is coupled to a preamplifier and mixer. The mixer is further coupled to a demodulator and filter which in turn is coupled to an am...
09/02/2003
6577267Device and method for contactlessly measuring speed on surfaces
A device for non-contractual measurement of the speed of an object moving over a surface comprises a means for radiating a signal of fixed frequency at an angle onto the surface in or against the direction of motion, said angle being variable by the movem...
06/10/2003
6577557Water column sound speed profiling system
A system and method for determining a sound speed profile of a water column. A free falling sound source is deployed in the water at a known location and time. The sound source transmits acoustic pulses omnidirectionally therefrom at predetermined times a...
06/10/2003
6535158Kinematic analysis of conically scanned environmental properties
A method for determining the velocity of features such as wind. The method preferably includes producing sensor signals and projecting the sensor signals sequentially along lines lying on the surface of a cone. The sensor signals may be in the form of lid...
03/18/2003
6426918Correlation speed sensor
A relative speed of an object is determined by monitoring random reflective surfaces in water. The system includes a first and second transmitter-receiver pair for producing echo signals of a monitored region. The monitoring pair of transducers are prefer...
07/30/2002
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