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公开(公告)号：US20240219259A1
公开(公告)日：2024-07-04
申请号：US18536774
申请日：2023-12-12
Applicant: Rosemount Tank Radar AB
Inventor： Håkan Delin , Lars-Ove Larsson , Carl Fjelkner , Christoffer Widahl
Abstract: A method of estimating vibration of a target, comprising performing a first sequence of a predefined first number of distance data acquisition operations, consecutive distance data acquisition operations being separated by a predefined first separation time period, each data acquisition operation resulting in a measurement data set, being a representation of the measurement signal, in a memory; accessing from the memory, the measurement data set for each distance data acquisition operation; determining a first sequence of distance variation values indicative of a variation over time of a distance between the vibration estimation system and the target, based on the measurement data set for each distance data acquisition operation of the first number of distance data acquisition operations; and estimating a first indicator of the vibration of the target based on the first sequence of distance variation values.
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公开(公告)号：US20240201419A1
公开(公告)日：2024-06-20
申请号：US18534797
申请日：2023-12-11
Applicant: NEC Corporation
Inventor： Hiroshi Imai
Abstract: A spatial optical communication system includes: a plurality of optical transmitting and receiving apparatuses capable of constituting a mesh spatial optical communication network; and at least one processor, the at least one processor carrying out an analysis process of inferring, on the basis of reception signals of the optical transmitting and receiving apparatuses, a state of an air environment in at least one portion of an area in which the spatial optical communication network is formed, or a state of an installation ground of each of the optical transmitting and receiving apparatuses in the at least one portion of the area.
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公开(公告)号：US11988772B2
公开(公告)日：2024-05-21
申请号：US17773503
申请日：2020-10-30
Inventor： Yu Rong , Daniel W. Bliss , Sharanya Srinivas , Adarsh Venkataramani
CPC classification number: G01S7/415 , G01H9/00 , G01S7/295 , G01S13/0209 , A61B5/05
Abstract: Remote recovery of acoustic signals from passive sources is provided. Wideband radars, such as ultra-wideband (UWB) radars can detect minute surface displacements for vibrometry applications. Embodiments described herein remotely sense sound and recover acoustic signals from vibrating sources using radars. Early research in this domain only demonstrated single sound source recovery using narrowband millimeter wave radars in direct line-of-sight scenarios. Instead, by using wideband radars (e.g., X band UWB radars), multiple sources separated in ranges are observed and their signals isolated and recovered. Additionally, the see-through ability of microwave signals is leveraged to extend this technology to surveillance of targets obstructed by barriers. Blind surveillance is achieved by reconstructing audio from a passive object which is merely in proximity of the sound source using clever radar and audio processing techniques.
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公开(公告)号：US11928811B2
公开(公告)日：2024-03-12
申请号：US17217427
申请日：2021-03-30
Applicant: Raytheon Technologies Corporation
Inventor： Amit Surana , Sudarshan N. Koushik , Kenji Homma
Abstract: A method for determining structural vibration mode characteristics includes preparing a digital image correlation (DIC) dataset for the component, applying a dynamic mode decomposition (DMD) technique to the DIC dataset to determine a plurality of DMD modes, selecting at least one dominant DMD mode from the plurality of DMD modes, classifying each of the at least one selected dominant DMD mode as a standing wave or a traveling wave, and determining structural vibration mode characteristics of the component by extracting the structural vibration mode characteristics from each of the at least one selected dominant DMD mode having a standing wave classification.
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5.发明公开公开(公告)号：US20240061098A1
公开(公告)日：2024-02-22
申请号：US18260925
申请日：2022-01-19
Inventor： Ali Hamoud ALSHEHRI , Yip Fun YEUNG , Mikio FUROKAWA , Takayuki HIRANO , Kamal YOUCEF-TOUMI
Abstract: Faults in rotating machines can be diagnosed or detected using two radio frequency (RF) sensing modes. RF sensing phenomenon can be used to detect the presence of undesirable behavior in rotating machines including excessive bending, vibration, eccentricity, torsion, and longitudinal strain. RF based sensors represent a non-invasive solution. The sensing modes are based on RF metamaterials and Doppler effect influence and radar cross section evaluation all coupled with a machine learning algorithm. The system is based on monitoring resonance shift, negative permeability and return loss magnitudes. Electromagnetic numerical simulations showed a significant change in those magnitudes upon applied mechanical strains as compared to original reference unstrained cases. Metamaterial texturing design can be controlled by controlling the cells scale and substrate materials.
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Patent Agency Ranking
公开(公告)号：US20230288247A1
公开(公告)日：2023-09-14
申请号：US18017025
申请日：2020-07-28
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji ISHIKAWA , Yoshifumi SHIRAKI , Takehiro MORIYA , Kenichi HITACHI , Atsushi ISHIZAWA , Katsuya OGURI
IPC: G01H9/00 , G01B9/02001 , H04R23/00
CPC classification number: G01H9/00 , G01B9/0201 , H04R23/008
Abstract: An optical phase modulation amount measurement technology using sound without being affected by noise included in an average light intensity is provided. A sound measurement method includes an interference light generation step of obtaining first light including light subjected to light phase modulation by a sound measurement unit and second light including light subjected to light phase modulation by the sound measurement unit, which differs from the first light, from light emitted from a light source, a first light detection step of obtaining a first electrical signal from the first light, a second light detection step of obtaining a second electrical signal from the second light, and a differential signal generation step of obtaining a differential signal that is a difference between the first electrical signal and the second electrical signal, wherein a phase of the light subjected to light phase modulation included in the first light and a phase of the light subjected to the light phase modulation included in the second light are in an inverted relationship, and an optical phase modulation amount φs by sound is measured as a current Δi of the differential signal expressed by an equation Δi=βIA cos (φs+φ0) (where β is a predetermined constant, IA is an amplitude of an interference fringe, and φ0 is an optical phase modulation amount by an element other than sound).
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7.发明公开公开(公告)号：US20230213485A1
公开(公告)日：2023-07-06
申请号：US17779316
申请日：2020-12-01
Applicant: MTU Aero Engines AG
Inventor： Harald SCHÖNENBORN , Lukas KOHLMANN , Stefan SCHWARZ , Malte KRACK , Benjamin Seeger
CPC classification number: G01N29/12 , F01D5/34 , G01H9/00 , G01M13/00 , G01M15/14 , G01M5/0016 , G01M5/0066 , F05D2260/83 , G01N2291/014
Abstract: A method is provided including the steps: —first excitation of the object via a multifrequency signal; —detecting a first response signal of the object at one or multiple measuring points at the object; —transforming the first response signal from a time range into a frequency-dependent range; —selecting one or multiple frequencies, based on the frequency-dependent range; —second excitation of the object based on the selected frequencies; —detecting a second response signal of the object at one or multiple measuring points of the object; —ascertaining a mechanical parameter based on the second response signal.
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公开(公告)号：US20230204409A1
公开(公告)日：2023-06-29
申请号：US18087190
申请日：2022-12-22
Applicant: ConcurrentData, Inc.
Inventor： Karl SLAMA , Mark RAUCHFUSS
IPC: G01H9/00
CPC classification number: G01H9/00
Abstract: A non-contact method is presented for measuring vibration on a surface of an object. The method includes: projecting light from three light sources towards a point of interest on a surface of an object, and detecting the light reflected by the point of interest on the surface using three detectors, where each detector of the three detectors captures light from a corresponding one of the three light sources. From the light captured, calculating vertical displacement of the surface at the point of interest using triangulation, calculating rotational displacement of the surface at the point of interest about an x axis using triangulation; and calculating rotational displacement of the surface at the point of interest about y axis using triangulation, where the x axis and the y axis define a plane which is parallel to surface of the object.
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9.发明申请公开(公告)号：US20180264526A1
公开(公告)日：2018-09-20
申请号：US15920215
申请日：2018-03-13
Applicant: LG ELECTRONICS INC.
Inventor： Wonsu KIM , Sungdu KWON , Salkmann JI , Samnyol HONG
CPC classification number: B08B3/12 , B08B3/10 , B08B17/02 , G01H9/00 , G01H13/00 , G02B27/0006 , G06T7/20
Abstract: A device for cleaning an object surface, including a substrate provided on the object surface, a plurality of electrodes provided on the substrate, a dielectric layer provided on the substrate to cover the electrodes, and a control device supplying an alternating-current (AC) power to the electrodes including supplying a first AC power having a predetermined first frequency and a predetermined first voltage to the electrodes during a first time period to vibrate a droplet on the surface of the object by a periodic change of an electrostatic force generated at the electrodes, the first frequency being set to the resonant frequency of the liquid droplet.
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公开(公告)号：US10018460B2
公开(公告)日：2018-07-10
申请号：US13667309
申请日：2012-11-02
Applicant: Polytec GmbH
Inventor： Matthias Schussler , Christian Rembe , Alexander Drabenstedt , Robert Kowarsch , Wanja Ochs
CPC classification number: G01B9/02022 , G01B9/02002 , G01B9/02028 , G01B2290/45 , G01B2290/70 , G01H9/00
Abstract: A device for the interferometric measuring of an object, including a light source to generate an emitted beam, a beam splitting device for splitting the emitted beam into a measuring beam and at least first and second reference beams, an optic interference device, and first and second detectors, with the interference device and the first detector being embodied cooperating such that the measuring beam, at least partially reflected by the object, and the first reference beam are interfered on at least one detector area of the first detector. The interference device and the second detector are embodied cooperating such that the measuring beam, at least partially scattered by the object, and the second reference beam are interfered on at least one detector area of the second detector. A method is also provided for the interferometric measuring of an object.
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