| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | SONIC WAVE SYNCHRONIZER | EP94917877.0 | 1994-02-14 | EP0745227A1 | 1996-12-04 | Garde, Lawrence |
| A general-purpose, adaptable, device for interfacing acoustic and ultrasonic transducers to circuits for high resolution distance and motion measurement, and two-way communication. A generator signal (52) synchronizes to a sensing transducer signal (21), or a reference signal (23). A detector (20) provides a detected-cycle signal (22) and a detected-amplitude signal (24) from the signal being detected. Comparator (30) creates a comparator signal (32) from the detected-cycle and generator signals. A sustaining circuit provides flywheel operation during gaps. A driver (60) drives a radiating transducer. Options include: single or dual transducer operation, continuous or pulsed-burst operation, optimum frequency communication using low cost piezoelectric transducers, sonic wave frequency scanning, phase and amplitude modulation and demodulation, fast synchronization, detected vs reference signal comparison, and self-testing. | ||||||
| 62 | Procédé de formation de voies pour sonar, notamment pour sonar remorqué | EP90402492.4 | 1990-09-11 | EP0418141A1 | 1991-03-20 | Gulli, Christian; Le Gall, Jean; Grall, Georges |
L'invention concerne les procédés de formation de voies pour sonar. Elle consiste, après avoir échantillonné à une fréquence T = 1/4fo (fo fréquence de réception centrale du sonar) les signaux des hydrophones (1-N) du sonar et les avoir transposés en bande de base, à sous-échantillonner les signaux ainsi transposés avec une période TSE = kT (k entier) sensiblement égale à 1,25 B où B est la bande de fréquence de réception du sonar. Un premier ensemble de signaux est sous-échantillonné à des instants identiques pour former un secteur frontal (S1). Deux autres ensembles de signaux sont sous-échantillonnés avec des retards entre les signaux de deux hydrophones adjacents égaux à T, ce qui détermine deux secteurs latéraux (S2, S3) adjacents au secteur frontal. Ces signaux sous-échantillonnés sont ensuite transmis en série par le câble de remorquage (30) de l'antenne du sonar et sont traités (60) dans des circuits FFT qui permettent de former dans chaque secteur un ensemble de voies couvrant ce secteur. Elle permet de diminuer considérablement le débit des données entre la partie du sonar remorquée et la partie du sonar située dans le bateau. |
||||||
| 63 | Method for improving performance of a Sodar system | US14432450 | 2013-10-02 | US09696423B2 | 2017-07-04 | Andrew Louis Martin |
| A method is disclosed for improving performance of a Sodar system adapted to locate discontinuities in the atmosphere by transmitting pulse compression signals such as plural acoustic chirps. The method comprises transmitting the acoustic chirps, receiving acoustic echoes of the chirps, and processing the acoustic echoes to provide an indication of the discontinuities, wherein the processing includes correcting range or resolution error associated with the acoustic echoes. | ||||||
| 64 | VECTOR SENSOR FOR MEASURING PARTICLE MOVEMENT IN A MEDIUM | US15027816 | 2014-10-03 | US20160252391A1 | 2016-09-01 | Markus LINNE; Peter SIGRAY |
| The present invention relates to a vector sensor for measuring particle movement in a medium. The vector sensor comprises a magnetic body that is held at a certain distance from a magnetometer in such a way that the magnetic body can move in time with a passing particle movement, wherein the magnetometer is arranged to detect the oscillations in the magnetic field that the movements in the medium produce. | ||||||
| 65 | PARKING ASSISTANCE FOR A VEHICLE | US14863240 | 2015-09-23 | US20160084958A1 | 2016-03-24 | Sungmin KIM; Byeongrim JO; Juhnho PARK |
| Systems and techniques are described that provide automated parking assistance for a vehicle. In some implementations, a parking assistance apparatus includes a frequency generator configured to generate a first frequency and a second frequency, and generate at least one synthesized frequency that is synthesized from the first frequency and the second frequency. The apparatus also includes a piezoelectric converter configured to, using piezoelectric effects, transmit ultrasonic waves having the at least one synthesized frequency, and receive reflected ultrasonic waves that result from the transmitted ultrasonic waves being reflected by an object. The apparatus also includes a filter unit configured to detect a predetermined frequency from the reflected ultrasonic waves. | ||||||
| 66 | HYPERFINE INTERPOLATED RANGE FINDING FOR CW LIDAR, RADAR, and SONAR USING REPEATING WAVEFORMS AND FOURIER TRANSFORM REORDERING | US14817805 | 2015-08-04 | US20160047891A1 | 2016-02-18 | Joel F. Campbell; Bing Lin; Amin R. Nehrir |
| Systems, methods, and devices may enhance the apparent sample rate of data collected using Nyquist sampling from a system, such as Continuous Wave (CW) Light detection and ranging (“Lidar”), Radio detection and ranging (“Radar”), or Sound Navigation and Ranging (“Sonar”), that has been modulated with a repeating waveform, such as linear swept frequency, by reordering of the data in the frequency domain. The enhancement of the apparent sample rate may result in a highly interpolated range profile where the data resolution may be enhanced by a factor equal to the number of repeats in the signal being processed, and may result in a highly detained range measurement with a high precision. The various embodiments may combine data from multiple modulation repeats into a single highly interpolated pulse, which may result in a real-time finer range measurement from CW Lidar, Radar, or Sonar systems. | ||||||
| 67 | Multiple ultrasonic preamplifiers with independent automatic gain control | US13463216 | 2012-05-03 | US09157996B1 | 2015-10-13 | Brian Eugene Elwell |
| Multiple signals are received from multiple receivers in a motion sensor. Each signal is amplified and undergoes a gain adjustment individually to generate multiple preamplified received ultrasonic signals. A separate demodulator circuit receives a different preamplified received ultrasonic signal and generates a sum of the demodulated signals and a difference between the demodulated signals. A low pass filter corresponding to a demodulator circuit removes the sum of the demodulated signals. The mixer circuit combines the difference between the demodulated signals to generate an integrated circuit. The gain of each preamplifier may be adjusted based on a sensitivity setting, target levels of the preamplifier, and a level of a preamplified ultrasonic signal, resulting in an integrated motion sign that originated from multiple signals to different receivers in the sensor housing. | ||||||
| 68 | Active sonar system and active sonar method using fuzzy logic | US12628246 | 2009-12-01 | US08320216B2 | 2012-11-27 | Qin Jiang |
| A computer-implemented method of sonar processing includes identifying, with a processor, a detection having a detection probability value, the detection in a selected beam, wherein the detection is associated with a detection range cell having detection range cell data. The method also includes comparing, with the processor, the detection range cell data with range cell data from a corresponding range cell from at least one overlapping beam overlapping the selected beam. The method also includes updating, with the processor, the detection probability value based upon the comparing. A sonar system uses the above-described method. A computer readable storage medium has instructions thereon to achieve the above-described method. | ||||||
| 69 | SYSTEM AND METHOD FOR A VIRTUAL REFERENCE INTERFEROMETER | US13203186 | 2010-02-24 | US20120013908A1 | 2012-01-19 | Michael Galle |
| An interferometer generates interference between two (or more) waves that have traveled separate paths so as to measure a quantity of difference between these paths. One of these paths, the reference path, is usually one with well known spatial and material properties (such as free 5 space). The other path(s) is(are) the test path(s). The main difficulties in interferometry stem from the production and operation of this physical reference path. The present invention solves this problem by replacing the physical reference path with a virtual one. This is done by suitable operation on the physically generated interference pattern of an unreferenced interferometer with a virtually generated sinusoid of frequency corresponding to the desired reference path length. The result is a new form of interferometer called a Virtual Reference Interferometer. | ||||||
| 70 | ACTIVE SONAR SYSTEM AND ACTIVE SONAR METHOD USING FUZZY LOGIC | US12628246 | 2009-12-01 | US20110128819A1 | 2011-06-02 | Qin Jiang |
| A computer-implemented method of sonar processing includes identifying, with a processor, a detection having a detection probability value, the detection in a selected beam, wherein the detection is associated with a detection range cell having detection range cell data. The method also includes comparing, with the processor, the detection range cell data with range cell data from a corresponding range cell from at least one overlapping beam overlapping the selected beam. The method also includes updating, with the processor, the detection probability value based upon the comparing. A sonar system uses the above-described method. A computer readable storage medium has instructions thereon to achieve the above-described method. | ||||||
| 71 | Localization of high speed vehicles using continuous transmit waves | US10809005 | 2004-03-25 | US20040264297A1 | 2004-12-30 | Evan Frank Berkman; Paul D. Koenigs |
| The selection of multiple, suitably designed, demodulation reference signals can enable the measurement of a vehicle's speed using continuously transmitted frequency modulated (CTFM) signals. The unique solution of vehicle speed can be used to resolve the range Doppler ambiguity found in conventional CTFM sonar and radar systems. This can enable continuous range and speed estimates of high-speed vehicles with an attendant reduction in transmit power relative to pulse-echo systems with similar measures of performance due to the 100% duty cycle. | ||||||
| 72 | Dual channel switch with frequency band limiting | US09659676 | 2000-09-11 | US06385130B1 | 2002-05-07 | Claude D. Michel |
| An acoustic switch, having a predetermined frequency response, is disclosed that allows for a single channel device to be interconnected to multiple transducers. The acoustic switch ensures that the signals from the transducer closest to transmitter, which has a highest possible input level, is supplied to the single channel device for processing. | ||||||
| 73 | Personal object detector with enhanced stereo imaging capability | US33211 | 1998-03-02 | US6011754A | 2000-01-04 | David Burgess; Lee Felsenstein; Steven E. Saunders |
| A personal object or obstacle detector apparatus with enhanced stereo imaging capability includes a sonar system having dual receivers with field lobes positioned based on psychoacoustic considerations such as interaural intensity difference (IID) and interaural time difference (ITD). Receiver field pattern shapes and directions are selected to match the natural IID and ITD associated with human hearing. In one embodiment, dual receivers are used with a common transmitter while another embodiment utilizes two transmitter/receiver pairs with the transmitter and receiver collocated. | ||||||
| 74 | Frequency-steered acoustic beam forming system and process | US807106 | 1997-02-05 | US5923617A | 1999-07-13 | R. Lee Thompson; W. J. Zehner |
| A sonar system includes a pulse generator that produces an electrical signal having a plurality of frequencies. An acoustic radiator formed as a first blazed acoustic array is arranged to be driven by the electrical signal from the pulse generator. The blazed acoustic array includes a plurality of acoustic elements rotated away from the general plane of the array. The acoustic elements are arranged to be driven by the electrical signal from the pulse generator so that they radiate a sonic field that includes a plurality of sonic frequencies with each frequency being radiated at a characteristic angle. An acoustic receiver formed as a second blazed acoustic array is arranged such that components of the acoustic field reflected from the target toward the acoustic receiver produce acoustic waves having frequencies that correspond to the angles of incidence of the reflected acoustic field components. The signals indicative of the reflected frequencies are processed to form an image of the target. The invention may be embodied including phase delay, time delay, or synthetic aperture beamforming means. | ||||||
| 75 | Device for determining a distance range of an object | US525349 | 1995-09-07 | US5699280A | 1997-12-16 | Hajime Oda; Takuma Takahashi |
| A distance measurement device comprises distance measurement device for measuring a distance to an object, a processor for judging a result of the distance measurement of the distance measurement device, a first digital switch connected to the processor for setting a first division point where a measurement range of the distance measurement means is divided into a first long distance side and a first short distance side, a second digital switch for setting a second division point where a range between the first division point and the first short distance side is further divided into a second long distance side and a second short distance side. Based on the set states of the first and second digital switches, the processor determines which area the measurement result of the distance measurement device belongs to, from the plurality of distance areas into which the measurement result of the distance measurement device is divided with the first division point and the second division point. | ||||||
| 76 | Apparatus for and method of adaptively processing sonar data | US680953 | 1984-12-12 | US5481503A | 1996-01-02 | John P. Kuhn; Thomas S. Heath |
| The invention discloses an apparatus for and a method of adaptively processing a sonar power spectrum for improving the display of narrowband line structure characteristic of a target in a background of broadband interference which is rippled due to multipath propagation arrival structure. The processor employs a first Fourier transformer to convert the sonar frequency data into a complex correlation format. The autocorrelation is then time difference sampled to separate the broadband ripple interference from the broadband trend interference. The separate time difference samples are then transformed back to their real frequency format to form a broadband ripple estimate and a broadband trend estimate of the interference background. The ripple estimate is subtracted from the sonar signal to remove the ripple component and the resulting difference is normalized by a division by the interference trend estimate. The result is improved detectability of the narrowband lines in the presence of widely varying multipath interference. | ||||||
| 77 | Robust iterative technique for high-resolution spatial processing and spectral estimation | US611811 | 1984-05-18 | US4648057A | 1987-03-03 | Ronald A. Wagstaff; Jean L. Berrou |
| A nonlinear technique for high-resolution data processing produces high-rlution power spectra from the output of a conventional processor. First, a "guess" of the spectral estimate is formed. Then the spectral estimate is convolved with the system response function to produce estimated output levels. The differences between the estimated output levels and the measured output levels are used to modify the spectral estimate to produce a new "guess". This process is repeated until certain criteria are satisfied. | ||||||
| 78 | Frequency domain non-linear signal processing apparatus and method for discrimination against non-Gaussian interference | US508649 | 1983-06-28 | US4530076A | 1985-07-16 | Roger F. Dwyer |
| Apparatus and method for discriminating against non-Gaussian noise. Analog signals from an array of sensors are converted to real and imaginary digital representations and processed such that non-Gaussian noise is separated from signals of interest. The processor uses estimates of Kurtosis and quantiles from either past or adjacent frequency components to construct non-linear elements, which are then used to process remaining signal data to improve the signal-to-noise ratio thereof by removing non-Gaussian noise therefrom. | ||||||
| 79 | Signal processing devices | US87609 | 1979-10-23 | US4288764A | 1981-09-08 | Lip H. Ong |
| A time delay and integrate signal processing device is provided to which, in use, a clock signal having a duty cycle which varies linearly with time at a predetermined rate is applied at an input. The number of delay stages in the path of signals from a plurality of input taps is determined in accordance with a predetermined function of the rate of change of the clock duty cycle.Embodiments of the invention may be employed to advantage in SONAR applications where signals are received from a plurality of transducers to scan a sector by constructive summation of signal returns. The predetermined function may be chosen to minimize distortion during a scan and so scanning may take place at a higher rate than with prior art devices enabling full coverage of the sector with good range resolution to be achieved with a single device. | ||||||
| 80 | Beam forming of multiple signals | US16069861 | 1961-12-15 | US3863199A | 1975-01-28 | WOOD DAVID E |
| 1. Apparatus for beam forming signals received from an array of signal pick-up devices including in combination recording means for receiving and recording on a recording medium the signal inputs from an array of signal input devices, said recording medium being adapted to have its light modifying characteristics changed by said recording means in accordance with the signal inputs to said recording means whereby a plurality of tracks of light modifying marks are recorded on the recording medium with each track of marks representing the signal supplied from one signal input device of the array, a light source positioned adjacent the recording medium for imaging a light beam through the tracks on the medium, beam forming mask means positioned over said recording medium for disposing over the recorded tracks in a selected sequence masks representing optimum signal output from each elemental point of a selected range of view of the array of signal pick-up devices, and electro-optical conversion means for converting the light passing through both the record track and the mask into an electric output signal representative of coincidence between the mask and the track record at points where such coincidence occurs.
|
||||||
QQ群二维码
意见反馈
意见反馈