| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 367129000 | With plurality of transducers | 30 |
| 20080253230 | System and method for receiving and decoding electromagnetic transmissions within a well - Exemplary systems and methods are directed to transmission of electromagnetic (EM) pulses in a downhole environment, which is located below a surface of a landform. A sequence of EM energy pulses is generated from a signal generator located at the surface of the landform. The energy pulses are reflected at a ring frequency by one or more downhole transducers. The reflected energy pulse is received at a receiver, which is located at the surface, during a predetermined time interval. The receiver detects the received energy pulses through a time domain or frequency domain technique. The detected ring frequency is correlated to a parameter or condition of the downhole environment. | 10-16-2008 |
| 20090086577 | Acoustic source localization system and applications of the same - A system for locating an acoustic source from an acoustic event of the acoustic source. In one embodiment, the system includes a sensor network having a plurality of spatially separated sensor nodes each located in a predetermined position encountering acoustic waves generated by an acoustic event passing proximate to the plurality of spatially separated sensor nodes, where the plurality of spatially separated sensor nodes are synchronized to a common time base such that when the acoustic event is detected, information of the acoustic waves from each of the plurality of spatially separated sensor nodes is obtained and broadcasted through the sensor network. The system further includes a base station for receiving information of the acoustic waves broadcasted from the sensor network and processing the received information of the acoustic waves so as to locate the acoustic source of the acoustic event. | 04-02-2009 |
| 20090116339 | METHOD FOR LOCATING AN IMPACT ON A SURFACE AND DEVICE FOR IMPLEMENTING SUCH A METHOD - Method for locating an impact on a surface ( | 05-07-2009 |
| 20100020643 | System and methods for detecting shooter locations from an aircraft - The systems and methods described herein relate to an airborne shooter detection system having a plurality of sensors coupled to the body of an aircraft such as a helicopter. The system includes at least five sensors configured and arranged to disambiguate the location of a shooter. By measuring the arrival times of the shockwaves of projectiles at each of the sensors and determining the differences in the arrival times among sensors, the systems and methods may determine the location of one or more sources of the projectiles. A distance of at least ten meters separates two or more of the sensors. Such a separation is advantageous because it allows the system to disambiguate multiple shooters by resolving the curvature of the shockwave. | 01-28-2010 |
| 20100135120 | Ground threat location for an aircraft - Systems and methods are provided for locating threats to an aircraft that are located on the ground. Associated bearings are determined from an aircraft for each of a plurality of detected shots from a threat at ground level. A plurality of pairs of bearings are selected, and a weight value is calculated for each selected pair of bearings. An estimated position for the threat is determined from each selected pair of bearings. An improved estimation of the position for the threat is calculated as a weighted combination of the estimated positions. | 06-03-2010 |
| 20100142328 | Projectile-Detection Collars and Methods - User-wearable sensor arrays for use with projectile-detection systems, and methods of detecting a projectile with user-wearable sensor arrays. | 06-10-2010 |
| 20100278013 | System and method for precision acoustic event detection - Systems and methods of providing precision locations for sensors which make up an array of sensors in a gunshot detection system. Consistent with some exemplary implementations, sensors may employ a commercial GPS which reports a sensor position or a group of pseudoranges to GPS satellites. A server may collect differential information from a differential node and, in one exemplary implementation, may calculate a precision position for each sensor by adjusting the reported position or pseudoranges with the differential information. In other exemplary implementations, differential information may be sent from the host to individual sensors which calculate their own precision positions. Exemplary differential information may include latitude and longitude corrections, pseudorange corrections, ionospheric delay, GPS satellite clock drift, or other corrective term which will improve the accuracy of a sensor position. | 11-04-2010 |
| 20100329082 | RANGE FINDING AUDIO SYSTEM - A range finding audio system automatically modifies the audio output of an audio source based on the distance of a listener from the speakers. A speaker in an audio system may include a range device coupled with a controller. The range device may utilize infrared, laser, or acoustic technology to determine the distance between the speaker and the listener. The controller may transfer distance information to an audio interface of a processor unit. The audio lo interface may include a positioning routine to modify the audio output according to the distance from the speaker to the listener. Alternatively, the controller may perform the functions ascribed to the positioning routine making the necessary modifications to the audio output based on the distance information. | 12-30-2010 |
| 20110149691 | Supercavitating Projectile Tracking System and Method - A system for three-dimensional tracking of high speed undersea projectiles may utilize a distributed field of randomly positioned passive acoustic sensors. The system measures variables related to the pressure field generated by a supercavitating projectile in flight wherein the amplitude of the pressure generated at a point in space is related to the projectile dimensions, velocity, and trajectory. The system iteratively processes data from the sensors to measure launch velocity, flight direction (trajectory), ballistic coefficient (drag), and/or maximum range. | 06-23-2011 |
| 20110317522 | SOUND SOURCE LOCALIZATION BASED ON REFLECTIONS AND ROOM ESTIMATION - Described is modeling a room to obtain estimates for walls and a ceiling, and using the model to improve sound source localization by incorporating reflection (reverberation) data into the location estimation computations. In a calibration step, reflections of a known sound are detected at a microphone array, with their corresponding signals processed to estimate wall (and ceiling) locations. In a sound source localization step, when an actual sound (including reverberations) is detected, the signals are processed into hypotheses that include reflection data predictions based upon possible locations, given the room model. The location corresponding to the hypothesis that matches (maximum likelihood) the actual sound data is the estimated location of the sound source. | 12-29-2011 |
| 20120155220 | SYSTEM FOR TRANSFERRING WIRELESS POWER USING ULTRASONIC WAVE - Disclosed is a system of transferring wireless power using an ultrasonic wave, including: an ultrasonic wave generating device converting and transferring electric energy to an ultrasonic wave; and an ultrasonic wave receiving device receiving the ultrasonic wave to convert the ultrasonic wave to electric energy, wherein the ultrasonic wave generating device includes a radiation plate with a plurality of ultrasonic elements and controls an effective area of the radiation plate by turning on/off the plurality of ultrasonic elements so that the ultrasonic wave receiving device is disposed at a position minimizing dispersion effect due to a circular radiation of the ultrasonic wave. | 06-21-2012 |
| 20130128701 | AUDIO SOURCE LOCALIZATION - An audio source localization apparatus receives signals from a microphrine array ( | 05-23-2013 |
| 20130208569 | SOUND-BASED WELD TRAVEL SPEED SENSING SYSTEM AND METHOD - A weld travel speed sensing system includes at least one sound sensor configured to sense a sound generated to allow determination of a position of a welding torch. The weld travel speed sensing system is configured to determine a position of a point on the welding torch based on the sensed sound. | 08-15-2013 |
| 20130272097 | SYSTEMS, METHODS, AND APPARATUS FOR ESTIMATING DIRECTION OF ARRIVAL - Systems, methods, and apparatus for matching pair-wise differences (e.g., phase delay measurements) to an inventory of source direction candidates, and application of pair-wise source direction estimates, are described. | 10-17-2013 |
| 20130308426 | DEPLOYABLE GROUND SENSORS - A method includes enabling a power supply of a ground sensor device to provide power to one or more components of the ground sensor device based on one or more rotations of a rotor of the ground sensor device. | 11-21-2013 |
| 20130308427 | APPARATUS FOR DETECTING AN EDGE OF A MATERIAL WEB - Some aspects relate to an apparatus for detecting an edge of a material web. In some examples, the apparatus comprises an ultrasound sensor which comprises two or more separately readable ultrasound receiver elements and an ultrasound transmitter element, wherein the ultrasound transmitter element is designed and arranged such that it applies an ultrasound measurement signal to two or more of the ultrasound receiver elements. | 11-21-2013 |
| 20140003195 | Coordinating devices to estimate distance, relative position, and device attitude | 01-02-2014 |
| 20140056106 | SOUND SOURCE SIGNAL FILTERING APPARATUS BASED ON CALCULATED DISTANCE BETWEEN MICROPHONE AND SOUND SOURCE - Provided is a sound source signal filtering method and apparatus. The sound source signal filtering method includes: generating two or more microphone output signals by combining sound source signals input through a plurality of microphones; calculating distances between the microphones and a sound source from which the sound source signals are emitted by using distance relationships according to frequencies of the sound source signals extracted from the generated microphone output signals; and filtering the sound source signals to obtain one or more sound source signals corresponding to a predetermined distance by using the calculated distances. Accordingly, it is possible to obtain only sound source signals emitted from a sound source at a particular distance from the microphone array among a plurality of sound source signals input through the microphone array. | 02-27-2014 |
| 20140092711 | METHOD FOR IDENTIFYING A SEISMIC EVENT AND A SEISMIC DETECTOR FOR IMPLEMENTING SAME - A method for identifying a seismic even makes it possible to determine the direction to a source of a seismic disturbance both on the surface and in a three-dimensional space and increases the probability of correct identification of a seismic event and the accuracy of the determination of the direction to the source. A compact seismic detector for implementing the method reduces the cost of scanning and servicing a perimeter protection system constructed on the basis of such detectors. In the method, two or three pairs of seismic sensors which are divided by a distance and are oriented at an angle with respect to one another, for example mutually perpendicularly along the axes X, Y or along the axes X, Y, Z, respectively, are combined to form one seismic detector. The resultant seismic data are processed to determine the direction to the source of the seismic disturbance. | 04-03-2014 |
| 20140169137 | SYSTEM AND PROCESSING APPARATUS FOR MEASURING SURFACE ACOUSTIC WAVE SENSITIVE AREA SIZE AND METHOD THEREOF - A measuring method of touch sensitive area size of a SAW sensor module is provided. The SAW sensor module comprises a substrate configured for propagating SAW, a first transmitter and a first receiver corresponding to a first axis, a second transmitter and a second receiver corresponding to a second axis. The SAWs emitted by the first transmitter at least pass through a first initial distance xi, propagate through a second axis length y after reflected by a first SAW reflecting bar, and enter the first receiver after reflected by a second SAW reflecting bar. The SAWs emitted by the second transmitter at least pass through a second initial distance yi, propagate through a first axis length x after reflected by a third SAW reflecting bar, and enter the second receiver after reflected by a fourth SAW reflecting bar. | 06-19-2014 |
| 20140241126 | SOUND SOURCE DETECTION SYSTEM - A sound source detection system for detecting a sound source (e.g., running sound of a vehicle) based on sound collected by microphones extracts characteristic amounts from the sound collected by the microphones, sets a plurality of classes according to the position of the sound source by a multi-class pattern recognition method (e.g., multi-class SVM) using the characteristic amounts, extracts characteristic amounts from sound collected by the microphones for detection of a sound source, determines a class to which the extracted characteristic amounts belong, from the preset plurality of classes, and estimates the sound source based on the class. | 08-28-2014 |
| 20140269200 | PASSIVE ACOUSTIC BEARING ESTIMATION VIA ULTRA SHORT BASELINE WIDEBAND METHODS - In various embodiments, a passive bearing detector is disclosed. The passive bearing detector comprises a plurality of hydrophones. The plurality of hydrophones is arranged in a three-dimensional geometry. The three-dimensional geometry exposes each of the plurality of hydrophones to an ambient aquatic acoustic environment. The passive bearing detector further comprises a processor electrically coupled to the plurality of hydrophones. The processor is configured to determine a direction of arrival of an unknown broadband acoustic signal received by the plurality of hydrophones based on the phase difference of the unknown broadband acoustic signal at each of the plurality of hydrophones. | 09-18-2014 |
| 20140301166 | Method for determining distance between underwater acoustic devices - The invention consists of a method which comprises a plurality of steps for determining difference in distance from a reference point to at least two sensor modules | 10-09-2014 |
| 20140376334 | ACOUSTIC MONITORING SYSTEM AND A METHOD OF ACOUSTIC MONITORING - The invention relates to an acoustic monitoring system comprising at least two isolated acoustic receivers ( | 12-25-2014 |
| 20150071038 | SYSTEM AND METHOD FOR GUNSHOT DETECTION WITHIN A BUILDING - A system for detecting a discharge of a firearm includes a detection component and a location component. The detection component is configured to detect a discharge of a firearm within a building using microphones associated with two or more telephones. The two or more telephones are communicatively coupled with a central server. The location component determines, based on audio data gathered by the microphones, a location at which the firearm was discharged within the building. | 03-12-2015 |
| 20150085615 | MOTION MODIFIED STEERING VECTOR - For a motion modified steering vector, a motion module modifies a prior steering vector with a motion vector. A steering module spatially filters audio signals using the modified steering vector. | 03-26-2015 |
| 20150131411 | USE OF HYBRID TRANSDUCER ARRAY FOR SECURITY EVENT DETECTION SYSTEM - Security events, such as gunshots may be determined using hybrid sensors. The hybrid sensors have at least two different elements that are sensitive to the security event, such as conventional microphone and a fiber optic microphone, which, in the case of a gunshot, permits a better scanning of the report of the gunshot to better determine its direction, signature features, and time of arrival. Additionally, sensor can be employed having multiple elements that are sensitive to a security event where at least one of the elements is not coplanar with the rest. This displacement along an orthogonal axis may be used to improve the ability of a network of such sensors to determine the direction and origin of a security event in a three dimensional system. | 05-14-2015 |
| 20150346314 | NOISE SOURCE DECOMPOSITION SYSTEM AND METHOD USING AN ADAPTABLE APERTURE PHASED ARRAY - A system and method for determining a characteristic of a noise source. A first array of microphones is mounted on a platform moveable from a starting position to an ending position along a line parallel to a central axis of the noise source. A second array of microphones includes sound sensors mounted in a spaced apart fixed position with respect to the noise source. A processing system processes first information from the first array of microphones and second information from the second array of microphones. The processing system collects and stores the first and second information at each discrete step of the first array, spatially filters the first information, processes and calibrates the filtered first information based on the second information, and further processes the calibrated first information to obtain a characteristic at a selected location. For flyover testing, the first array is instead held in a fixed position. | 12-03-2015 |
| 20160061934 | Estimating and Tracking Multiple Attributes of Multiple Objects from Multi-Sensor Data - Systems and methods for estimating and tracking multiple attributes of multiple objects from multi-sensor data are provided. An exemplary method includes identifying features associated with sensor data. The sensor data represents data captured by at least one of a plurality of acoustic and non-acoustic sensors. Identification of the features associated with the sensor data may be based variously on detected sounds, motions, images, and the like. The exemplary method further includes determining, in parallel, multiple probable objects based at least in part on the identified features. Various embodiments of the method also include forming hypotheses based at least in part on associating identified features with the multiple probable objects and attributing the formed hypotheses to channels. Sequence of the formed hypotheses are constructed. The exemplary system includes a tracking module configured to provide the channels and constructed sequences for use in various signal processing, such as signal enhancement. | 03-03-2016 |
| 20160161589 | AUDIO SOURCE IMAGING SYSTEM - An audio source imaging system translates audio source location information from a format suitable for an audio source location and isolation system to a format suitable for a user display. The transformation may be to an image referenced to the position of a sensor array, the position of one of the tracked audio sources, or a position with a known displacement from the sensor array. | 06-09-2016 |
