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7604596 |
Ultrasonic signal processor for a hand held ultrasonic diagnostic instrument
A hand held ultrasonic instrument is provided in a portable unit which performs both B mode and Doppler imaging. The instrument includes a transducer array mounted in a hand-held enclosure, with an...
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7586813 |
Signal processing apparatus for an ultrasound transducer, ultrasound receiver and method for operating an ultrasound receiver
To reduce signal interference and improve the signal-to-noise ratio in the transmitted signal, the analog signals produced by an ultrasound transducer are promptly digitized. In accordance with the...
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7583562 |
Transducer circuit coupled to a control unit through a cable
The transducer circuit includes a transducer component, a drive circuit for the transducer component, a control port for coupling the drive circuit to a control unit and a modulator. The modulator...
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7433267 |
Two wire resistive sensor
A circuit with two terminals that receive an input current. The circuit includes a sensor, and a controller to generate a modulated signal. The circuit also includes a flyback circuit that receives...
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7423934 |
System for detecting, tracking, and reconstructing signals in spectrally competitive environments
A system applicable to acoustic, seismic, electromagnetic, hydrodynamic, and shock waves utilizing a map between signal time series and signal vectors defining the mathematical wave field model...
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7411866 |
User interface containing acoustic sensing modules
The present invention relates to a user interface system that is acoustically operated for the control of connected devices. Through the interface, acoustic sounds, such as tap, can be...
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7366057 |
Converter control with LC filtering
An arrangement for signal processing in ultrasonic transducers in flow meters has an ultrasonic transducer acted upon by a drive signal with the ultrasonic transducer being connected to a resonant...
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7348894 |
Method and apparatus for using a data telemetry system over multi-conductor wirelines
A data telemetry system for multi-conductor wirelines to enhance transmission of analog and digital signals with frequency content up to 100 kHz by assigning at least two conductors to a first...
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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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7123548 |
System for detecting, tracking, and reconstructing signals in spectrally competitive environments
A system applicable to acoustic, seismic, electromagnetic, hydrodynamic, and shock waves utilizing a map between signal time series and signal vectors defining the mathematical wave field model...
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7064664 |
Graffiti detection system and method of using the same
The present invention involves a system and method for detecting a graffiti-making act such as the spray of a spray paint can, the writing with a felt-marker pen on a surface, and the scratching...
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7064662 |
Master signal transmitter with allied servant receiver to receive a directed signal from the transmitter
A device for locating an object, which includes a master transmitter with at least one servant receiver. A signal from the master transmitter unit activates the servant receiver unit, which then...
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7012854 |
Method for detecting emitted acoustic signals including signal to noise ratio enhancement
A plurality of sensors and a digital adaptive tuning filter bank are used in extracting a desired emitted signal embedded in a noisy environment. By monitoring noise statistics of the sensor...
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6870794 |
Transducer and cable combination
A transducer and electrical cable combination for use, preferably, in a trolling motor. The electrical cable includes an outer shield connected to the chassis ground of the trolling motor; an inner...
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6845062 |
Manatee warning system
A system ( 100 ) and method for identifying a presence of a creature ( 140 ) disposed in water ( 135 ). This system includes a transducer ( 105 ) for receiving at least one vibrational wave and...
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6810076 |
Efficient echo canceller for ADSL applications
Architecture of an efficient adaptive digital echo canceller includes a frequency domain update block, a far-end signal estimation block and a time domain echo cancellation block. The echo...
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6717983 |
Ultrasonic coding modem for digital network communication
An ultrasonic coding modem for digital network communication comprises a transmitting device having a first piezoelectric substrate, and a receiving device having a second piezoelectric substrate....
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6707762 |
System and method for heterodyning an ultrasonic signal
A method and apparatus for detecting leaks and mechanical faults by way of an ultrasonic device. An output from a variable gain amplifier is supplied to a pair of heterodyning circuits, i.e., 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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6629063 |
Amplitude temporal order dependent adaptive processor
An acoustic signal processor that samples acoustic data, performs a spectrum analysis of the sampled acoustic data, stores the acoustic data in corresponding frequency bins, and then filters...
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6608798 |
Transmit-receive switch apparatus and method
A transmit-receive (T-R) switch for achieving fast T-R switching times while ensuring that the signal strength of a received signal is not fully coupled. A differential amplifier and an inverting...
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6597634 |
System and method for stochastic characterization of sparse, four-dimensional, underwater-sound signals
A signal processing system provides and processes a digital signal, converted from to an analog signal, which includes a noise component and possibly also an information component comprising small...
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6594201 |
System and method for localizing targets using multiple arrays
A system and process for localizing signals received on multiple co-linear arrays reduces the adverse effects on localization performance due to background noise. The system and process coherently...
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6545946 |
Method and apparatus for eliminating substantially false echoes produced by electrical noise induced into high gain receiver circuits
For use with a high gain receiver circuit which receives echo pulses of frequencies within a predetermined bandwidth and at times within interpulse periods of a predetermined pulse repetition rate...
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6545945 |
Material classification apparatus and method
The present invention provides signification improvements over the apparatus and method disclosed by U.S. Pat. No. 4,922,467. The invention provides an apparatus for material classification and...
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6501705 |
Acoustic surveillance system with signature and bearing data display
An underwater acoustic sensor system for detecting and efficiently displaying data from small, shallow-draft targets at high speeds in shallow or very shallow water. Sonar buoys transmit electrical...
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6424596 |
Method and apparatus for reducing noise from near ocean surface sources
The present invention is directed to a method and system for significantly reducing the acoustic noise from near-surface sources using an array processing technique that utilizes Multiple Signal...
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6421300 |
Method for screen display of a multidimensional data field, particularly for data supplied by a passive sonar, and system for implementing said method
A method for producing, from passive sonar data, operational images interactively controlled by an operator, continuously adjusted according to operational requirements and compatible with changing...
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6418083 |
Phase fluctuation based signal processor
A method for characterizing degree of phase fluctuation of a signal and a signal processor for accomplishing such characterization, is described, in which a time series of complex data vectors are...
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6411566 |
System and method for processing an underwater acoustic signal by identifying nonlinearity in the underwater acoustic signal
A nonlinear signal processing system and method is used to identify nonlinearity (e.g., chaos) in underwater acoustic signals, such as sonar signals. The system and method detects the underwater...
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6356510 |
Phase fluctuation enhanced adaptive processor
A novel method and apparatus for signal processing are described which discriminate between signals and noise based on the magnitude of the phase fluctuations. In an embodiment of the invention,...
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6310554 |
Severe weather detection apparatus and method of detecting and warning of severe weather conditions
A severe weather detection apparatus for detecting severe weather and method of detecting and warning of approaching severe weather conditions is provided. The severe weather detector apparatus...
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6307811 |
Method for the operation of several adjacent ultrasonic sensors
In the method according to the invention, several adjacent synchronized ultrasonic sensors automatically generate a clock signal with measurement clocks (M1, M2, M3). The transmission pulses (S1,...
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6288974 |
System and method for enhancing detection of objects through an obscuring medium
A system for detecting an object of interest through a medium such as the atmosphere or ocean employs a reference object from which a reference signal emanates. A detector detects and transforms...
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6269052 |
Transmitting/receiving circuit and transmitting/receiving method for a transducer
The circuit and the method serve to transmit a transmission signal to a transducer and to receive a reception signal from the transducer. The transmitter and the receiver are each alternatively...
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6262943 |
Signal processing system for sensing a periodic signal in noise
A method and an apparatus for distinguishing systematic artifacts from noise involves localizing functional noise in the vicinity of predicted functional peaks. The method is particularly relevant...
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6208589 |
Method of screening acoustic signals transmitted by a moving target
The invention relates to a method of screening an acoustic signal or a spectrum line of maximum energy transmitted by a "target" that can be submerged at sea, from among a multitude of acoustic...
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6201764 |
Apparatus and method for correcting for capacitance variations in hydrophones
A method and an apparatus are provided for matching the response of hydrophones 22 to the response of geophones 24 and significantly reducing response variations between hydrophones caused by...
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6173074 |
Acoustic signature recognition and identification
An acoustic signature recognition and identification system receives signals from a sensor placed on a designated piece of equipment. The acoustic data is digitized and processed, via a Fast...
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6163504 |
Signal detector and methodology for monitoring sound signals having frequencies over a selected frequency range
A signal detector for monitoring sound signals comprises a first sensor operative in response to sound signals to produce a first electrical signal, first processing circuitry operative in response...
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6163267 |
Device for measuring noise
The invention relates to a device for measuring noise comprising a sensor circuit having at least two sensors, an ambient noise eliminating circuit and a signal processing circuit. All the sensors...
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6141294 |
Data acquisition system including data transmission controller for octavely nested acoustic line arrays
A data acquisition system receives an analog input signal comprising a pllity of octavely-nested components including a base octave and a selected number of higher-level octaves, and transmits...
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6122312 |
Acoustic wave communication apparatus and method
An apparatus for accurately transmitting and receiving acoustic waves indoors is provided. The apparatus contains a microphone, a speaker, a processing circuit, a first amplifier, a second...
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6122224 |
Variable integration detection apparatus and method for multipath environments
A receiver and method are disclosed that improves signal detection in a mipath environment wherein the desired reflected acoustic pulse is degraded by multipath reflections and embedded in noise....
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6104984 |
Automated method of frequency determination in software metric data through the use of the multiple signal classification (MUSIC) algorithm
In accordance with the present invention, a method for obtaining frequency nformation about a given data set is realized. The method comprises the steps of providing a processing unit; inputting a...
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6104672 |
General fluctuation sensitive filter
An apparatus and method for filtering the effects of large amplitude signal fluctuations from elements of the cross-spectral density matrix of a detor array. The outputs of the array are sampled T...
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6094150 |
System and method of measuring noise of mobile body using a plurality microphones
In a noise measuring system comprising a microphone array and a directivity forming section for controlling the direction of directivity of the microphone array, the directivity forming section...
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6058076 |
Signal detector and method for detecting signals having selected frequency characteristics
The present invention generally relates to procedures and apparatus for monitoring incoming signals to detect the presence of selected target signals contained within the universe of signals...
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6051027 |
Efficient three dimensional extraction
A layered structure is divided into a plurality of regions. Transmission line equivalents (Green's functions) in the spectral domain are formed between all regions within the layered structure. The...
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6014897 |
Method and apparatus for improving sidelobe performance of sparse array using harmonic imaging
A method and an apparatus for enhancing the side-lobe performance of a sparse ultrasonic transducer array using harmonic imaging to reduce all beam sidelobe (including grating lobe) levels....
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