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| Number | Title | Issue Date |
| 8169853 | Acoustic system quality assurance and testing Embodiments of the invention provide systems and methods for testing acoustic systems. According to one embodiment, a method for testing an acoustic system can comprise receiving a signal from the acoustic system at a testing device coupled with the acoustic system ... | 05/01/2012 |
| 8164976 | Acoustic system quality assurance and testing Embodiments of the invention provide for testing acoustic systems. According to one embodiment, testing an acoustic system can comprise receiving a signal from the acoustic system at a testing device via one of a plurality of channels between the acoustic system and... | 04/24/2012 |
| 8159900 | Acoustic system quality assurance and testing Embodiments of the invention provide systems and methods for testing acoustic systems. According to one embodiment, a method for testing an acoustic system can comprise receiving a signal from the acoustic system at a testing device coupled with the acoustic system ... | 04/17/2012 |
| 8139439 | Methods and systems for seismic sensor calibration Methods and systems for calibrating seismic sensors configured or designed for use in seismic signal detection. According to certain embodiments of the present disclosure, a current is injected into a moving coil of a seismic sensor and a voltage is measured across ... | 03/20/2012 |
| 8130590 | Wirelessly activating a unit of a subterranean survey system for testing To test at least one unit of a subterranean survey system, the unit detects presence of wireless signaling of a mobile device. After the detecting, a wireless connection is established between the unit and the mobile device. A test at the unit is performed in respon... | 03/06/2012 |
| 8111581 | Monitoring system for a ship'S radiated noise A ship's radiated noise monitoring system includes a plurality of arrays of spaced vibration-responsive detectors, the arrays being adapted for location adjacent to the ship's hull in the region of possible noise sources; summing amplifiers for receiving the detecto... | 02/07/2012 |
| 8077541 | Testing a sensor to produce a filter for noise attenuation To test a seismic sensor, an output of the seismic sensor in response to a test signal applied by a signal generator is measured. According to a first function that corresponds to a reference response of the seismic sensor and according to a second function that cor... | 12/13/2011 |
| 8064285 | Method for functionally testing an ultrasonic sensor A method for functionally testing an ultrasonic sensor on a motor vehicle in which, in a test operating mode, an ultrasonic signal is emitted whose magnitude is large enough that under conventional conditions this ultrasonic signal is reflected by a ground surface i... | 11/22/2011 |
| 8036063 | System and method for automatic sensitivity adjustment of an acoustic detector A method and system for automatically adjusting a sensitivity of an acoustic detector. The method comprises receiving an acoustic signal from a remote device, detecting the unique pattern embedded therein, changing a mode of operation based upon the detection, measu... | 10/11/2011 |
| 8009508 | Ultrasonic generator system The system generates resonant ultrasonic vibrations, preferably in a torsional mode. A control circuit monitors, feedback signals therefrom, which are scanned to determine the frequency at which minima occur. The frequency of the ultrasonic signal is then adjusted t... | 08/30/2011 |
| 7952959 | Phantom for standardizing ultrasonograph and method of obtaining standardized ultrasonographic image using the phantom Provided are a phantom for standardizing ultrasonograph and a method of obtaining an ultrasonographic image using the phantom, and more particularly, a phantom for measuring fat content in a target organ as a gray level distribution using an ultrasonographic image a... | 05/31/2011 |
| 7843764 | Ultrasonic imaging apparatus A plurality of signal transmitters are respectively configured to produce a pulse current by repeatedly switching the connection state of a switching element. A plurality of ultrasonic transducers are respectively configured to transmit an ultrasonic pulse to a subj... | 11/30/2010 |
| 7764570 | Feedback protection of pressure measurement devices Systems and methods for feedback protection of pressure measurement devices are disclosed. In one embodiment, a transmitter inside a pressure measurement device transmits a transmission signal directly or indirectly toward an ambient opening of the pressure measurem... | 07/27/2010 |
| 7738316 | Method and apparatus for hydrophone array fault detection and exclusion A system is disclosed that provides an improvement in detecting a faulty hydrophone channel in a hydrophone array. The disclosed technique operates on pairs of hydrophones or, to generalize, on groups of two or more hydrophones; this is in contrast with operating on... | 06/15/2010 |
| 7646669 | Method for measuring flow noise of water over a hydrophone A method for measuring water-flow noise over a hydrophone comprising: coupling the hydrophone to a distal end of a hydrodynamic-drag-reduced beam, which has a proximal end that is rotatably connected to a frame; pivoting the beam through water; and recording the wat... | 01/12/2010 |
| 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 location of each transducer element relative to the expected location of eac... | 05/19/2009 |
| 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 automatically detecting changes of transfer functions due to changes in mass ... | 05/19/2009 |
| 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 coupled to the oscillator, for receiving the system frequency; a cou... | 11/18/2008 |
| 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 on-board bearing system at successive path positions of a vehicle that dete... | 11/04/2008 |
| 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 apparatus with plate deployed at level-1 (12) and ... | 08/26/2008 |
| 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 infrasound in the vicinity of the sensor prior to the arrival of inf... | 07/01/2008 |
| 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 proposes a method making it possible to perform antenna calibrati... | 06/17/2008 |
| 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 apparatus comprising: adjustment means for positioning the boom at the null ... | 06/17/2008 |
| 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 means for positioning the boom at the null point; (b) actuator means fo... | 06/10/2008 |
| 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 doors. The device uses accelerometers and a microcontroller for the dete... | 05/20/2008 |
| 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, opposite wall capable of reflecting the sound wave in which the first... | 05/20/2008 |
| 7372770 | Ultrasonic Doppler sensor for speech-based user interface A method and system detect speech activity. An ultrasonic signal is directed at a face of a speaker over time. A Doppler signal of the ultrasonic signal is acquired after reflection by the face. Energy in the Doppler signal is measured over time. The energy over tim... | 05/13/2008 |
| 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 functionality or parameters to optimize its performance. The transducer cha... | 05/06/2008 |
| 7359283 | System for combining signals of pressure sensors and particle motion sensors in marine seismic streamers Signals of pressure sensors and particle motion sensors located in marine seismic streamers are combined to generate pressure sensor data and particle motion data with substantially the same broad bandwidth. The noisy low frequency part of the motion signals are cal... | 04/15/2008 |
| 7359282 | Methods and apparatus of source control for borehole seismic A method and apparatus for controlling seismic sources. The method and apparatus enable firing of a seismic sources at either a precise time or a precise position of the seismic source. Controlling the firing of the seismic source facilitates more accurate seismic d... | 04/15/2008 |
| 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 undesirable resonance modes. The system operates by carrying out a first sc... | 04/08/2008 |
| 7349806 | System and method for extracting optical properties from environmental parameters in water A method for predicting water clarity at a plurality of water depths for a location including providing training data to a neural network, the training data representative of water measurements at the location, thereafter receiving inputs including temperature, sali... | 03/25/2008 |
| 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 terminal of a data transmittal means and to a first terminal of a data re... | 03/25/2008 |
| 7347282 | Steerable soil penetration system A steerable soil penetration system having a steerable penetration head, which compacts and does not cut away the surrounding soil and which is connected to an elongate flexible tubing such that the orientation of the penetration head can be varied relative to the t... | 03/25/2008 |
| 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 comprises a code signal generator and a calibration sound pressure generator.... | 02/12/2008 |
| 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 quick estimate of the acoustic pressure at locations that are off limit t... | 02/12/2008 |
| 7322410 | Controllable production well packer An apparatus and method for operating an electrically powered device in a packer using the piping structure of the well as an electrical conductor for providing power and/or communications. The electrically powered device may comprise an electrically controllable va... | 01/29/2008 |
| 7322244 | Interrogation system for active monitoring of structural conditions Systems for monitoring structural health conditions of objects. Each system includes patch sensors attached to an object, wherein each patch sensor is capable of generating a wave upon receipt of an actuator signal and developing a sensor signal in response to the w... | 01/29/2008 |
| 7301852 | Methods of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications The present invention provides a method and apparatus for using an acoustic logging tool conveyed in a borehole in an earth formation for determining a characteristic of the formation. The method comprises using a first acoustic source for generating an acoustic sig... | 11/27/2007 |
| 7293520 | Control system for positioning of a marine seismic streamers A method of controlling a streamer positioning device (18) configured to be attached to a marine seismic streamer (12) and towed by seismic survey vessel (10) and having a wing and a wing motor for changing the orientation of the wing. The metho... | 11/13/2007 |
