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公开(公告)号：US12111395B2
公开(公告)日：2024-10-08
申请号：US18299928
申请日：2023-04-13
发明人： Marek Hustava , Pavel Kostelnik
CPC分类号： G01S15/931 , G01S7/52004 , G01S7/523 , G01S7/527 , G01S7/536 , G01S15/10 , G01S15/101
摘要： An illustrative controller includes: a transmitter to drive an acoustic transducer to generate a first acoustic burst and a second acoustic burst; a receiver coupled to the acoustic transducer to sense a first response to the first acoustic burst and a second response to the second acoustic burst; and a processing circuit to derive output data from the first and second responses in part by determining an offset frequency difference between the first and second responses, wherein the first acoustic burst has a first characteristic frequency and the second acoustic burst has a second characteristic frequency different from the first characteristic frequency.
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公开(公告)号：US20240241252A1
公开(公告)日：2024-07-18
申请号：US18562802
申请日：2022-05-20
申请人： FNV IP B.V.
CPC分类号： G01S15/8904 , G01S7/536 , G01S15/003 , G01S15/325
摘要： A method and system for mapping a target region (60) of space with signal scatterers. The method involves moving a signal transmitter (26) and/or signal receiver (46) along a respective trajectory (34, 54) relative to the target region, and meanwhile transmitting a probing signal (62) towards the target region, this probing signal including a time sequence of noise (70) with a predefined bandwidth, receiving a response signal (76) composed of components resulting from scattering of the probing signal (62) by respective portions of the target region, and repeatedly determining positions (QT, QR) of the transmitter and/or receiver. The method further involves transforming the probing signal (62) into multiple test signals, each test signal being associated with a propagation path via a portion of the target region, and correlating each of the test signals with the response signal (76) in the time domain, to generate a map of correlation strength values associated with the portions of the target region.
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公开(公告)号：US20220082655A1
公开(公告)日：2022-03-17
申请号：US17537269
申请日：2021-11-29
摘要： A radar signal sending method and a device provides for the sending of the radar signal to cooperative radars. A first time domain range in L time domain ranges is determined. A first radar signal is sent in the first time domain range. Any one of the L time domain ranges partially overlaps at least one of the other (L−1) time domain ranges, and an absolute value of a difference between time domain start locations of any two of the L time domain ranges is greater than or equal to a first threshold and less than or equal to a second threshold.
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公开(公告)号：US11125857B2
公开(公告)日：2021-09-21
申请号：US16040674
申请日：2018-07-20
申请人： NEC Corporation
发明人： Hisashi Shiba
摘要： A moving object detection system comprises: a transmission waveform setting section to set a transmission signal in such a way that a frequency of the transmission signal is linearly changed; a transmitting section to transmit the transmission signal; a receiving section to receive a reception signal resulting from a reflection of the transmission signal at an object; a Doppler coefficient estimating section to estimate a Doppler coefficient associated with a movement of the object by performing arithmetic processing on a waveform of the reception signal at a present time point and waveforms of the reception signal at one or more past time points, the one or more past time points being earlier than the present time point by one or more specified periods of time; and an object detection section to detect the object based on the transmission signal, the Doppler coefficient, and the reception signal.
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公开(公告)号：US10823848B2
公开(公告)日：2020-11-03
申请号：US15905899
申请日：2018-02-27
发明人： Tadashi Morita , Masahiko Hashimoto
摘要： A detection apparatus that includes correlation processing systems that each find a correlation between a predetermined code sequence and a wave detection signal obtained by detecting a phase-modulated input wave at a frequency different from a frequency used by a different one of the correlation processing systems, and thereby generate a correlation signal, level reduction processors that each receive the correlation signal from a corresponding one of the plurality of correlation processing systems and reduce a level of the received correlation signal when the correlation signal is not to be used for detection of the target or do not reduce the level of the received correlation signal when the correlation signal is to be used for detection of the target, and a detector that detects at least presence or absence of the target based on the correlation signal processed by each of the plurality of level reduction processors.
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公开(公告)号：US20200284891A1
公开(公告)日：2020-09-10
申请号：US16648934
申请日：2018-09-21
申请人： Robert Bosch GmbH
发明人： Dirk Schmid , Michael Schumann
IPC分类号： G01S7/536
摘要： A method and device for processing an echo signal received from an acoustic sensor. The echo signal is detected over a measurement time interval. A minimum value is ascertained, which describes a minimum amplitude of the echo signal within the measurement interval. An amplitude value is ascertained, which describes an amplitude of the echo signal within a measurement window. The measurement window is a predefined time interval within the measurement interval. A difference is ascertained between the minimum value and the amplitude value. A determination is made whether the echo signal comprises an interference signal of the first type or an interference signal of the second type, based on the ascertained difference.
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公开(公告)号：US10746863B2
公开(公告)日：2020-08-18
申请号：US15124200
申请日：2014-12-26
申请人： NEC Corporation
发明人： Osamu Hoshuyama
IPC分类号： G01S13/34 , G01S7/35 , G01S7/536 , G01S13/58 , G01S15/34 , G01S15/58 , G01S15/88 , G01S13/931 , G01S15/931 , G01S13/88
摘要： To acquire a beat frequency necessary for target extraction, target speed estimation, and Doppler influence detection by preventing the necessary beat frequency from overlapping unnecessary frequencies in a heterodyne processing result, an apparatus includes a wave receiver that receives a reflected wave of a chirp wave reflected from a target, and outputs a reception wave signal, a dual-sweep signal generator that generates a dual-sweep signal of the chirp wave, having a frequency which does not overlap that of the chirp wave, and a heterodyne processor that generates a beat frequency by multiplying the reception wave signal and the dual-sweep signal as a heterodyne signal.
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公开(公告)号：US10718861B2
公开(公告)日：2020-07-21
申请号：US15711591
申请日：2017-09-21
申请人： Hach Company
发明人： David L. Rick
IPC分类号： G01S13/58 , G01S13/10 , H04B1/69 , G01S17/32 , G01S13/34 , G01S13/88 , G01F23/284 , G01S7/4913 , G01S7/536 , G01S7/4911 , G01S7/35 , G01S15/32 , G01S17/58 , G01S15/88 , G01S15/58 , G01S17/88 , G01F23/296
摘要： A method for constructing a frequency profile of an emitted signal suitable for use in a non-contact ranging system with multi-scale spectral analysis includes determining N stepped frequency chirps, wherein each frequency chirp of the N stepped frequency chirps has a linear FM modulation of predetermined bandwidth and slope, and wherein a starting frequency for each of the plurality of stepped frequency chirps is chosen so that a non-linear step profile is created which extends over a predetermined total bandwidth, sorting the plurality of N stepped frequency chirps into P sub-sequences, where P is equal to the product of decimation factors to be used in the multi-scale spectral analysis, and ordering the P sub-sequences end to end in time.
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公开(公告)号：US10215613B2
公开(公告)日：2019-02-26
申请号：US15202185
申请日：2016-07-05
申请人： ABB Schweiz AG
发明人： Frank Kassubek , Miklos Lenner , Tobias Kaufmann , Detlef Pape
IPC分类号： G01F23/296 , G01N29/024 , G01N29/22 , G01S7/52 , G01S7/536 , G01S7/539 , G01S15/00 , G01S15/32 , G01S15/88 , G01B17/00 , G01H5/00 , G01N29/04
摘要： A system and a method for non-intrusive and continuous level measurement of a liquid enclosed by a solid wall of a vessel. The system comprises an ultrasonic transmitter for generating an ultrasound wave and for emitting it into the vessel wall, an ultrasonic receiver for receiving the ultrasound wave, and an electronic control and data processing unit (ECDU) for controlling operation of the transmitter and of the receiver and for determining the liquid level. The transmitter is able to emit the ultrasound wave as a primary Lamb wave into the vessel wall so that a part of the primary Lamb wave leaks from the vessel wall into the liquid in form of a pressure wave. The ECDU is adapted to repeatedly determine the time of flight of the pressure wave, change the ultrasonic frequency of the transmitter until the determined time of flight reaches a minimum, and determine the liquid level.
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公开(公告)号：US09945945B2
公开(公告)日：2018-04-17
申请号：US14380757
申请日：2013-02-25
申请人： NEC CORPORATION
摘要： Provided is a technology which is able to detect an object with high accuracy. A signal processing apparatus 1 includes a generating unit 2 and a detecting unit 3. The generating unit 2 includes a function of generating, as a transmitting signal, a modulation wave whose frequency changes non-repetitively. The detecting unit 3 includes a function of fetching the transmitting signal and a receiving signal which is received by a receiving means that can receive a reflection signal generated when the transmitting signal is reflected by an object. The detecting unit 3 includes a function of detecting at least one of presence of the object, distance to the object, and moving speed of the object, based on correlation between the receiving signal and the transmitting signal.
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