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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 8189427 | Clutter signal filtering for doppler signal Embodiments for filtering clutter signal from Doppler signal in an ultrasound system are disclosed. In one embodiment, a Doppler signal acquiring unit may transmit and receive ultrasound signals to and from a target object to acquire Doppler signal. A signal process... | 05/29/2012 |
| 8184503 | Process measurement instrument with target rejection A process measurement instrument with target rejection comprises a sensor circuit. The sensor circuit comprises a drive circuit for transmitting a pulse signal at a target of interest and a receive circuit receiving reflected echoes of the pulse signal and developin... | 05/22/2012 |
| 7835227 | Staged sodar sounding A monostatic sodar system (10) for atmospheric sounding includes a processor and display unit (12) that generates a set of acoustic chirps for transmission by transmitter 20. Discontinuities (22, 24 and 26) result in echoes (28,... | 11/16/2010 |
| 7826308 | Method for optimal design of non-uniform weighted periodic sparse arrays for ultrasound imaging system Disclosed herein is a method for the optimal design of an apodization function used for non-uniform weighted periodic sparse arrays for an ultrasound imaging system. The method includes the steps of (a) setting the interval PT of a transmit sparse array a... | 11/02/2010 |
| 7663974 | Fishfinder A fishfinder is provided for identifying with high precision a single fish under the ship and for measuring the length of the fish precisely. An operator of the fishfinder is assisted to grasp the depth and the length of the fish. A fishfinder transmits an ultrasoun... | 02/16/2010 |
| 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 between seawater and a mixture of methane gas and methane hydrate,... | 05/26/2009 |
| 7420876 | Obstacle sensor having supersonic sensor An obstacle sensor includes: a supersonic sensor for detecting an obstacle in a first range, the supersonic sensor including a substrate, a transmission device and a reception device disposed on the substrate; a detection element for detecting the obstacle in a seco... | 09/02/2008 |
| 7360417 | Fluid level detector A fluid detector for determining a presence of a fluid within a container includes a piezoelectric element that outputs a first ultrasonic signal in response to an input electrical signal and a lens with an upper portion and a lower portion. The piezoelectric elemen... | 04/22/2008 |
| 7355924 | 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 used in non-military environments and make possible low cost with subst... | 04/08/2008 |
| 7337686 | Multi-threat detection system A method and system for efficiently screening for dangerous threatening items are presented. The system includes an object unit designed to hold the object and a test unit including equipment for subjecting the object to a combination of two or more tests. There are... | 03/04/2008 |
| 7333394 | Navigational aid for diver A diver unit computes the direction and distance to a specified target. When the target is obstructed, the diver unit receives navigation assistance data from another diver unit. The navigation assistance data includes direction information that is referenced to a c... | 02/19/2008 |
| 7317659 | Measurement 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 |
| 7287425 | Ultrasonic fuel level monitoring device The invention describes a method of altering the transmitted frequency used in an ultrasonic ranging system for liquid level measurement in a fuel tank. The frequency agility of the system is an important component of performing liquid level measurement in an enclos... | 10/30/2007 |
| 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 transducer and converts the echo into an electric signal, and displays und... | 07/17/2007 |
| 7245059 | Method of exciting a piezoelectric crystal The invention describes the use of an electrical pulse that is a single square wave to excite a piezoelectric crystal. This pulse is applied alternately to either side of the crystal at twice the nominal resonant frequency of the crystal. This method provides a sign... | 07/17/2007 |
| 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 analysis result; extracting a signal based on the generated virtual p... | 07/03/2007 |
| 7225670 | Mounting structure, module, and liquid container The mounting structure for mounting the piezo-electric device (106) used to detect the consumption condition of the liquid in the liquid container (1) to the liquid container (1), having the receiving portion (363) to which the piezo-elec... | 06/05/2007 |
| 7203338 | Methods and apparatus to count people appearing in an image Methods and apparatus to count people appearing in an image are disclosed. One disclosed method reduces objects appearing in a series of images to one or more blobs; for each individual image in a set of the images of the series of images, represents the one or more... | 04/10/2007 |
| 7196656 | Apparatus for estimating direction of arrival of signal An apparatus for estimating direction of arrival of signal is provided that has excellent performance in terms of angular resolution and the number of signals that can be identified. In an array sensor comprising a plurality of sensor elements, the two outermost sen... | 03/27/2007 |
| 7187320 | Matched 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 |
| 7180442 | Target indentification method using cepstral coefficients A method of identifying an unknown target comprising creating a density function of cepstral coefficients for a known target; receiving a signal from the unknown target; transforming the signal from a time spectrum to a frequency spectrum using a Fourier transform; ... | 02/20/2007 |
| 7178408 | Sodar 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 |
| 7164932 | Millimeter band signal transmitting/receiving system having function of transmitting/receiving millimeter band signal and house provided with the same A millimeter band transmitter transmits one or more indirect path signal waves from the main lobe of a transmit antenna, and a direct path signal wave is transmitted in a side lobe of the transmit antenna. A receiver simultaneously receives each of the indirect and ... | 01/16/2007 |
| 7138938 | System and method for preemptively sensing an object and selectively operating both a collision countermeasure system and a parking assistance system aboard an automotive vehicle A system and method for preemptively sensing an object in the potential drive path of an automotive vehicle and selectively operating both a collision countermeasure system and a parking assistance system aboard the automotive vehicle are disclosed herein. The syste... | 11/21/2006 |
| 7129888 | High speed weighting signal generator for sidelobe canceller A sidelobe canceller for a transducer arrangement such as an antenna or sonar transducer uses a main transducer and one or more auxiliary transducers. The auxiliary received signals are weighted by FIR filters or by multipliers, and the weighted auxiliary signals ar... | 10/31/2006 |
| 7130243 | Location finding system, using reflected radio frequency or acoustic signals in a crowded reflector environment A method of locating one or more reflectors in an environment crowded with reflectors. A transmitter and multiple receivers are used to obtain reflected signals. Each path of a reflected signal is defined by an ellipse having the transmitter at one focus and a recei... | 10/31/2006 |
| 7119731 | Depth-based surveillance imaging A subject may be interrogated with electromagnetic radiation for producing image data representative of an image of the subject. First and second image data, produced based on reflectivity in first and second frequency ranges, may be related. In some examples, image... | 10/10/2006 |
| 7111509 | Method and device for determining an expectancy range for a filling level echo and a false echo The invention relates to a method of determining expectancy ranges to which echoes from a filling level envelope curve are assigned, which curve has been generated by a filling level measurement device. The determination of these expectancy ranges takes place in con... | 09/26/2006 |
| 7109910 | Mine detection using radar vibrometer A frequency-stepped radar may be used to detect buried landmines by sequentially inducing vibrations of different frequencies in the landmine. A sensor detects signals associated with the vibrations, and a processor processes the signals to detect the landmine. ... | 09/19/2006 |
| 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 between nonlinear active elements to generate beam patterns. A nonlin... | 09/19/2006 |
| 7106657 | Digital sounder module and method for detecting The invention is a digital sounder module and its method for detection. The digital sounder module includes a sonar carrier wave producing means, a band-pass filter, a pre-amplifier for providing a high sensitivity and extending a wide dynamic range, and an analog-t... | 09/12/2006 |
| 7095359 | Method 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 |
| 7095364 | Altitude measurement system and associated methods An altitude measuring system and method for aircraft is provided. The altitude measuring system includes altitude sensors for providing data to an altitude processing unit. The altitude processing unit spatially averages each output to determine a mean altitude. Pit... | 08/22/2006 |
| 7090642 | Ultrasonic transmitting and receiving apparatus and ultrasonic transmitting and receiving method An ultrasonic transmitting and receiving apparatus which is capable of reducing generation of side lobes, and thereby, obtaining images of satisfactory quality even when performing sector scan of an area having a wide range. The ultrasonic transmitting and receiving... | 08/15/2006 |
| 7091902 | Systems and methods for characterizing the coverage of ad hoc sensor networks The systems and methods according to this invention disclose that coverage for an ad hoc sensor network is fundamental to the deployment and utilization of such networks. The invention provides a method which characterizes the coverage of an ad hoc sensor network by... | 08/15/2006 |
| 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 orthogonal pairs, each pair being positioned opposite from another p... | 07/04/2006 |
| 7065466 | Attenuator test system System for testing attenuators by a flatness and standing wave ratio tests which includes a vector network analyzer (VNA) adapted to be coupled to a device under test (DUT) and which provides an input stimulus signal for the DUT and, when certain conditions are sati... | 06/20/2006 |
| 7054226 | Method and apparatus for echolocation Method and apparatus for application of echolocation to robot guidance and assisting the blind. The method is based on the echolocation of bats. It combines a source of pulsed ultrasound (100) with a recently-developed acoustic vector probe (AVP) (200)... | 05/30/2006 |
| 7040158 | Method for determining local inner and outer boundary layer length scales from drag measurements in high Reynolds number turbulent flows A method is presented for determining inner and outer boundary layer length scales from a succession of drag measurements of a cylindrical body in order to estimate flow noise and for computational modeling of the dynamics of towed arrays in a fluid medium. A succes... | 05/09/2006 |
| 7030806 | Time 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 |
