Class / Patent application number | Description | Number of patent applications / Date published |
367089000 | Speed determination | 38 |
20080273423 | Method and Apparatus for Fault-Tolerant, Correlation SONAR Processing - A system is disclosed that enables the use of an incomplete SONAR array matrix in a correlation SONAR system. An improvement is achieved through the generation of a correlation-array model matrix of hydrophone correlations, based on an independent estimate of the ship's velocity, such as from an inertial navigator. Meanwhile, estimates of the missing values are generated based on one or more values from the model matrix, an interpolation of values from the SONAR array matrix itself, or some combination thereof. Regardless of how the missing values are generated, the model matrix provides a basis for comparison with the SONAR array matrix, which is populated with the estimated values, wherein subsequent comparisons are made between successive iterations of the model matrix and the SONAR array matrix. By applying the disclosed technique, a correlation SONAR system with incomplete data is able to continue working, and in the presence of a greater number of hydrophone failures than before. | 11-06-2008 |
20080298175 | Waterproof Membrane Cover for Acoustic Arrays in Sodar Systems - A waterproof or water-resistant membrane cover for the acoustic transducer array of a sodar system. The membrane is placed over each transducer of the array. The membrane may be spaced from the array, with a structure such as a frame used to hold the membrane in place relative to the array. | 12-04-2008 |
20090052282 | SYSTEM 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 acoustic beams and receiving echoes from one or more range cells located substantially within the beams, at least one of the plurality of acoustic beams being angled non-orthogonally to at least one other of the plurality of acoustic beams. The method may calculate the directional spectrum associated with the waves from the received echoes. | 02-26-2009 |
20090059723 | Combined 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 optimization criteria that the output after combining has no bias error and has a minimized mean square error. With these criteria, the combining algorithm takes the form of a weighted summation of the spatial data stream and temporal data stream inputs with the weights being a function of the relative velocity errors. In combining spatial and temporal processing in this manner, the disclosed system provides improved velocity measurements for a wider range of ship's speeds. In particular, the system achieves performance levels of a spatial correlation sonar for low ship's speeds for which a temporal correlation sonar solution might not be available. The system also achieves performance levels of a temporal correlation sonar for high ship's speeds for which a spatial correlation sonar solution might not be available. | 03-05-2009 |
20090067290 | 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 SVP data for the body of water; determining a depth of a sound source within the body of water; selecting a first ray angle originating from the sound source; calculating a first ray trace for the first ray angle using only the SVP data as environmental inputs; repeating the selecting and calculating steps for second-n | 03-12-2009 |
20090238042 | METHODS 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 one or more signal beams. The method determines a position and location of an object associated with the navigation system based on a prediction of at least the second velocity measurement, and the navigation system is adjusted to perform within a prescribed measurement range based on a covariance of the first and second velocity measurements. The performance adjustments made in determining the position and location of the object are operable independent of the navigation system maintaining each of the signal beams due to one or more external environmental conditions. | 09-24-2009 |
20100149921 | SPATIAL 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 hydrophone and a second hydrophone respectively, wherein the first hydrophone and the second hydrophone are maximally separated in the spatial correlation sonar hydrophone array. The process further includes the step of selecting a time spacing between a first pulse and a second pulse such that the spacing is a function of the correlation time and a constant, wherein the constant is proportional to a size of the spatial correlation sonar hydrophone array, and wherein the correlation time is an approximate multiple of a sum of a time between the first pulse and the second pulse and a time between the second pulse and a next first pulse. | 06-17-2010 |
20100302907 | METHOD AND SYSTEM FOR REMOTE SOUND SPEED MEASUREMENT - A system and method of remote sound speed measurement are disclosed. In one embodiment, a system for estimating a sound speed comprises a plurality of transducers configured to i) transmit a first acoustic signal from a first location, ii) transmit a second acoustic signal at a second location, iii) receive a first reflected signal at a third location, and iv) receive a second reflected signal at a fourth location, the reflected signals comprising at least one echo from at least one of the acoustic signals; and a microprocessor configured to i) estimate a travel time based on at least the first or second reflected signals, ii) estimate a travel time difference based on at least the first and second reflected signals, and iii) estimate a sound speed based on at least the estimated travel time and estimated travel time difference. | 12-02-2010 |
20110103188 | SYSTEM AND METHOD TO EXTEND DEEP WATER CORRELATION SONAR SYSTEMS TO SHALLOW DEPTHS - In an embodiment, a correlation SONAR system is adapted for use in shallow water. A pulse generator transmits an initial burst of pulses towards a bottom of a body of water. Echoes of the initial burst of pulses are received on a hydrophone array. After the receiving the echoes of the initial burst of pulses, a second burst of pulses is transmitted towards the bottom of the body of water. The echoes of the second burst of pulses are received on the hydrophone array, and a SONAR processor correlates a pulse from the initial burst of pulses and a pulse from the second burst of pulses to calculate a velocity estimate. | 05-05-2011 |
20110103189 | ANOMALY DETECTOR FOR PIPELINES - Apparatus for locating an object in a pipeline, comprising a transmitting station having means for transmitting in the pipeline acoustic emissions having a frequency in the range from 20 KHz to 200 KHz; a receiving station having a receiver capable of receiving the acoustic emissions transmitted by the transmitting station; one of the receiving station and the transmitting station being located at a known position on the pipeline and the other of the receiving station and the transmitting station being located on the object; and clock means to determine the time taken for the acoustic emissions to travel between the transmitting station and the receiving station. | 05-05-2011 |
20110149689 | Acoustic Doppler Dual Current Profiler System and Method - An AD2CP includes at least one transducer assembly emitting sets of slanted directional acoustic beams and receiving the echoes; and electronics that processes the echoes into depth cells and computes velocity in each depth cell. The AD2CP is configured so that each beam set has a profiling catenation, at least two of which are different, and the AD2CP is configured so that the emitting, receiving and processing operate contemporaneously. | 06-23-2011 |
20110182146 | Correlation 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. | 07-28-2011 |
20110242939 | ACTIVE SONAR SYSTEM AND ACTIVE SONAR METHOD USING A PULSE SORTING TRANSFORM - An active sonar system, a method associated therewith, and a computer-readable medium associate therewith, each provide a method of sonar signal processing. The method includes receiving a plurality of initial detections of a target and associated initial detection times, associated with sound transmitted at a pulse rate interval (PRI), and associated with received sound including echoes from a target. The echoes result from the transmitted sound. The method also includes analyzing the plurality of initial detection times with a pulse sorting transform configured to identify periodic PST detection times within the plurality of initial detection times that are equally spaced in time and that are representative of the echoes from the target. | 10-06-2011 |
20110261650 | METHOD FOR THE RADIATION MONITORING OF MOVING OBJECTS AND A RADIATION PORTAL MONITOR FOR CARRYING OUT SAID METHOD - The invention relates to radiation monitoring and can be used for detecting radioactive materials during the unauthorized movement thereof. The method involves registering background gamma quanta and detecting a monitored object in a monitoring zone when the registered gamma radiation exceeds the background radiation. The moment when an object arrives at a distance Rπ from gamma radiation detectors is determined and the moment when the object moves away from the gamma radiation detectors to a distance Rγ is determined. The gamma quanta are registered from the moment when the object arrives at the given distance Rπ from the gamma radiation detectors to the moment when the object moves away from the gamma radiation detectors to the distance Rγ. Rπ=(0.8−1.2)(H+D) and Rγ=(0.8−1.2)(H+D), where H is the height of the horizontal plane that is the plane of symmetry of the position of the gamma radiation detectors; and D is half the distance between two gamma radiation detectors mounted at the same height. The monitor comprises the following components accommodated in a twin-post portal: a controller with a signaling unit, gamma radiation detectors with amplifiers and analog-to-digital converters, an object detection sensor based on an ultrasonic oscillation source and an ultrasonic oscillation receiver, a detection signal amplifier, a detector, a smoothing filter and an object detection and distance recording unit. The invention makes it possible to decrease the smallest detectable mass of radioactive material. | 10-27-2011 |
20120063268 | Simultaneous Ultrasonic Cross-Correlation and Transit Time Measurements for Multiphase Flow Rate Analysis - Pairs of acoustic transducers positioned at different radial distances in a conduit are used to measure travel times of acoustic signals in opposite directions and inclined to the direction of a fluid flow in the borehole. These contrapropagation measurements are used to estimate fluid velocity and volumetric flow rates of the fluid components in the conduit. | 03-15-2012 |
20120176864 | ULTRASONIC MEASUREMENT APPARATUS AND METHOD FOR EVALUATING AN ULTRASONIC SIGNAL - An ultrasonic measurement apparatus is described having a receiving device which determines a measurement sequence relating to a time variation of the period lengths of an ultrasonic signal received from an in-vehicle and/or external ultrasonic transmitter, a comparison device which determines a comparison information item relating to a deviation of the determined measurement sequence from at least one reference sequence, and an evaluation device which determines, taking into consideration the determined comparison information item, an information item relating to a signal form transmitted by the ultrasonic transmitter, a relative speed between the receiving device and the ultrasonic transmitter, a relative speed of at least one reflecting object situated in a transmission path between the receiving device and the ultrasonic transmitter, and/or a shape feature of the at least one reflecting object. A method for evaluating an ultrasonic signal is also described. | 07-12-2012 |
20120275270 | MEASUREMENT OF 3D COORDINATES OF TRANSMITTER - Implementations and techniques for measuring 3D coordinates of a transmitter using a receiver and a reflector are generally disclosed. The receiver may be attached asymmetrically to the reflector. | 11-01-2012 |
20130003502 | CONFIGURABLE ULTRASOUND MEASUREMENT LOGIC IN A MOBILE COMPUTING DEVICE - A device, system, method, and machine readable medium for configurable ultrasound Doppler measurements from a mobile device are disclosed. In one embodiment, the device includes an oscillator capable of generating an ultrasound frequency sound wave. The device also includes an ultrasound emission module capable of emitting a first ultrasound wave at a first frequency and at a first power level and a second ultrasound wave at a second frequency and at a second power level. The device also an ultrasound receiver and amplifier module capable of receiving and amplifying ultrasound emission waves. The device also includes processing logic capable of receiving the first and second ultrasound waves and displaying those waves on a display device. | 01-03-2013 |
20130039151 | CANCELLATION OF PRODUCTS GENERATED BY HARMONICS OF A SQUARE WAVE USED IN SQUARE-WAVE MIXING - A mixer circuit includes three square wave mixers and a combiner. A first square wave mixer in the circuit multiplies an input signal with a first square wave. A second square wave mixer and a third square wave mixer in the circuit each multiplies the input signal with a second square wave and a third square wave respectively. The second and third square waves have a same frequency as the first square wave, but phases that respectively lead and lag the phase of the first square wave by a first value. The combiner adds the outputs of the mixers. A low-pass filter external to the mixer circuit filters the sum generated by the combiner to generate a filtered output. In an embodiment, the first value equals forty five degrees, and the filtered output is rendered free of products generated by third and fifth harmonics of the first square wave square. | 02-14-2013 |
20140177393 | ULTRASOUND INTERIOR SPACE MONITORING SYSTEM FOR A VEHICLE - An ultrasound interior space monitoring system for a motor vehicle includes at least one ultrasound transmitter and at least one ultrasound receiver that can be attached in the interior space of the motor vehicle and are configured for the contactless monitoring of the interior space. The system is operable in an operating mode which is active when a monitoring mode in which the monitoring of the interior takes place is inactive, wherein a position, a movement speed and/or a movement direction of an object, in particular of a hand of a vehicle occupant, can be determined and at least one fitting element of the vehicle can be actuated in dependence on the position, on the movement speed and/or on the movement direction by means of the at least one ultrasound transmitter and by means of the at least one ultrasound receiver in the operating mode. | 06-26-2014 |
20150103629 | CORRECTION OF DETECTING DEPTH AND CALCULATION OF SPEED OF MOVING OBJECTS BASED ON TIME OF FLIGHT OF ULTRASOUND PULSES - During transmission, speed of ultrasound pulses gradually reduces due to their energy loss from acoustic impedance. So, calculating a detecting depth with fixed speed of the ultrasound pulses will distort ultrasound images. Correction of the detecting depth will rectify a depth registration and improve the imaging quality. The thickness and density of piezoelectric elements (PZT) decide a quantity of the ultrasound pulses, which affect their detecting depth. The density and sound speed in PZT elements decide the frequency of the ultrasound pulses, which can be used to increase the detecting depth for a high frequency ultrasound. Moving objects can change speed of reflected ultrasound pulses, which change their TOF and TOF shift. Therefore the TOF shift can be used to calculate the velocity of the moving objects in a continuous and a pulsed wave and a color ultrasound, and correct aliasing of the pulsed wave and the color ultrasound. | 04-16-2015 |
20160091308 | MICROELECTROMECHANICAL SYSTEMS (MEMS) ACOUSTIC SENSOR-BASED GESTURE RECOGNITION - Microelectromechanical systems (MEMS) acoustic sensor-based gesture recognition associated with detecting gestures is described. Provided implementations can comprise MEMS acoustic sensor elements that receive signals reflected off an object. A time sequence associated with each of the MEMS acoustic sensor elements detecting proximity of the object is determined. A gesture is identified based on the time sequence. Functions of a device are controlled according to the gesture. | 03-31-2016 |
20160116588 | OBJECT DETECTION APPARATUS - An object detection apparatus is applied to a movable body including an object detection sensor which transmits a search wave and receives a reflected wave of the search wave as detection information of an object, and detects the object present around the movable body based on the detection information. The apparatus includes a frequency detection section which detects an occurrence frequency of a disturbance signal at the same time within a predetermined transmission time period determined with reference to a transmission period of the search wave, and a disturbance determination section which determines presence or absence of occurrence of disturbance based on the occurrence frequency detected by the frequency detection section. | 04-28-2016 |
20160116589 | OBJECT DETECTING APPARATUS - An object detecting apparatus that detects an object using a distance measuring sensor and is mounted in a moving body includes a position calculator that calculates a position of the object relative to the moving body, a speed detector that detects a speed of the moving body, a displacement calculator that calculates an distance moved by the moving body, a relative speed calculator that calculates a relative speed between the moving body and the object, a first determiner that determines whether a position calculation in the position calculator is possible, a second determiner that determines whether the moved distance calculation by the displacement calculator is possible, and an estimator that estimate the position of the object based on a last known position of the object, a last known distance moved by the moving body, or a last known relative speed. | 04-28-2016 |
367090000 | By doppler effect | 14 |
20090046537 | Terminal and method and system for automatically controlling terminal - A system and method of automatically controlling a terminal are disclosed. In one aspect, there is a method comprising: installing a sensing device in a terminal; and automatically controlling operations of the terminal when a certain object is detected by the sensing device within a predetermined range. According to certain aspects, a hard disk may be subjected to a full protection, power supplied to peripherals such as a keyboard or a mouse is saved. Furthermore, in other aspects, an automatic power-up/down operation to the terminal, automatic forward and backward operations of a browser and an automatic page-flipping operation of application software may be implemented. In another aspect, there is a control system for the terminal and the terminal equipped with such a control system. | 02-19-2009 |
20100226208 | Method of Detecting and Compensating for Precipitation in Sodar Systems - A method of detecting precipitation with a sodar apparatus that transmits sound beams into the atmosphere, detects echoes returned from the atmosphere, from the echoes determines a Doppler-shifted spectrum comprising the relative strength of the echoes at various Doppler-shifted frequencies, and estimates wind speed and direction. The method includes automatically estimating the presence of precipitation based on the Doppler-shifted spectrum. | 09-09-2010 |
20100302908 | SYSTEM AND METHOD FOR DETERMINING WAVE CHARACTERISTICS FROM A MOVING PLATFORM - A system and a method for determining one or more wave characteristics from a moving platform are disclosed. A sonar system, such as an Acoustic Doppler Current Profiler, can profile the water motion relative to the platform, and an earth reference can determine a measure of the platform motion relative to a fixed earth reference. Both water profile and earth reference measurements can be synergistically employed to compensate for motion of the platform. Directional wave spectra and non-directional wave spectrum can be computed and translated via linear wave theory to surface height spectra and used to calculate characteristics, such as significant wave height, peak period, and peak direction. | 12-02-2010 |
20110075518 | MULTI-FREQUENCY, MULTI-BEAM ACOUSTIC DOPPLER SYSTEM - An acoustic Doppler system comprising a plurality of acoustic transceivers, an acoustic subsystem controller and a main processing unit operatively connected to the acoustic subsystem controller. A first of the plurality of acoustic transceivers operates at a first acoustic frequency and is operatively connected to a first group of transducers producing an acoustic signal. A second of the plurality of acoustic transceivers operates at a second acoustic frequency and is operatively connected to a second group of transducers producing an acoustic signal. The first and second acoustic transceivers are adapted to operate concurrently at the first and second acoustic frequencies. The acoustic subsystem controller is operatively connected to the first and second acoustic transceivers and controls the acoustic signals produced by the first and second group of transducers. The main processing unit is adapted to execute instructions to the first and second group of transducers to produce acoustic signals having at least two frequencies and is adapted to run at least two processing methods concurrently. The main processing unit analyzes data received by the first and second group of transducers, automatically adjusts the acoustic frequencies of the acoustic signals produced by the first and second group of transducers, and automatically selects a method of processing the data received by the first and second group of transducers. | 03-31-2011 |
20110242940 | Noise suppression by adaptive speed regulation of towed marine geophysical streamer - A method for towing marine geophysical sensor streamers in a body of water includes moving a towing vessel at a selected speed along the surface of the body of water. At least one geophysical sensor streamer is towed by the vessel at a selected depth in the water. A velocity of the streamer in the water is measured at at least one position along the streamer. The selected speed of the towing vessel is adjusted if the measured velocity exceeds a selected threshold. | 10-06-2011 |
20120087210 | MOVING OBJECT DETECTING APPARATUS - A moving object detecting apparatus includes: a transmitting/receiving unit for radiating an ultrasonic wave and receiving a reflective wave reflected from an object present in a monitoring space; a phase detection circuit for mixing reference signals with a reflective signal and obtaining a pair of Doppler signals each having an amplitude depending on a phase difference from the reference signal, each of the Doppler signals having a different phase from each other; a rotation angle calculation unit for calculating a rotation angle; a cumulative addition unit for accumulating the rotation angle; and a comparison unit for comparing the accumulated rotation angle with a threshold value. In the moving object detecting apparatus, a single ultrasonic vibrator is commonly used in the transmitting unit and the receiving unit. | 04-12-2012 |
20130058194 | MULTI-STATE BEAMFORMING ARRAY - A sonar system and method of operating a sonar system are disclosed. In one embodiment, the sonar system comprises an array of transducers and a multiplexer configurable into a plurality of states. In one embodiment, the multiplexer, when in a first state, electrically couples a plurality of connections with the plurality of transducers via a first mapping and, in a second state, electrically couples the plurality of connections with the plurality of transducers via a second mapping. | 03-07-2013 |
20130100773 | WIDE-AREA WIND VELOCITY PROFILER - A wide-area wind velocity profiler, which includes two or more active sound sources and at least one receiver module, in a bistatic SODAR configuration. The profiler measures wind velocities in the atmospheric boundary layer above large geographic areas, such as wind farms or airports. | 04-25-2013 |
20140086014 | ULTRASOUND IMAGE PROCESSING APPARATUS AND PROGRAM - An ultrasound diagnostic apparatus generates Doppler waveform images whose visibility is improved appropriately in accordance with changes in measurement conditions. The ultrasound diagnostic apparatus includes a frequency-analyzing unit that generates frequency spectrum data on Doppler shift frequency components of ultrasonic waves that are received after being transmitted towards a subject and reflected in the subject, and a line data generating unit for generating line data, wherein arrays of multiple pixels are stipulated according to the corresponding frequencies and each pixel value represents the magnitude of the Doppler shift frequency component, based on the frequency spectrum data. The ultrasound diagnostic apparatus determines whether or not each pixel of line data at a previously appointed time point is a noise pixel, and the values of pixels that are determined to be noise pixels are adjusted by multiplying the pixel value with a weighting factor (w) of 0 to less than 1. | 03-27-2014 |
367091000 | Vehicle mounted system for determining vehicle speed | 5 |
20140126333 | Doppler Angle of Attack Sensor System for Watercraft - A watercraft angle of attack system includes sensors having a position locator; a heading sensor; a tilt sensor; an acoustic Doppler velocity sensor that measures velocity of the boat relative to a volume of water remote from the boat so as to reduce the boat-induced disturbance of the velocity in the volume; and a processor programmed to receive real time data from the sensors; and to compute and display angle of attack of the watercraft relative to the water. | 05-08-2014 |
20140328141 | SYSTEMS AND METHODS FOR NAVIGATING AUTONOMOUS UNDERWATER VEHICLES - Systems and methods are described herein for a variable-depth sonar. A null in the frequency response between a first and second operating frequency band is identified. A center operating frequency for each of the first and the second operating band is adjusted based on the ambient pressure. Furthermore, the velocity state of a vehicle may be calculated using periodic velocity updates. At least one transducer transmits a first signal in a first direction, and a Doppler sensor receives an echo of the first signal. The vehicle is turned in a second direction, and the at least one transducer transmits a second signal in the second direction. Using the first and the second velocity measurement, a vehicle velocity state is calculated. | 11-06-2014 |
20150378020 | MEASUREMENT APPARATUS, MEASUREMENT SYSTEM, PROGRAM AND CONTROL METHOD - The present invention provides a new art for grasping a moving direction of an underwater vehicle. In order to grasp the moving direction of the underwater vehicle, a measurement apparatus | 12-31-2015 |
20160054444 | METHOD AND SONAR DEVICE FOR DETERMINING THE SPEED OF MOVEMENT OF A NAVAL VEHICLE IN RELATION TO THE SEA BED - Sonar intended to be carried by a naval vehicle including at least one element for transmitting an acoustic signal, at least one element for receiving the acoustic signal transmitted and reflected on the sea bed and at least two phase centres (PC | 02-25-2016 |
20160154104 | METHOD FOR OPERATING A SURROUNDINGS-DETECTION SYSTEM OF A VEHICLE | 06-02-2016 |