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公开(公告)号：US10908131B2
公开(公告)日：2021-02-02
申请号：US15563606
申请日：2016-04-04
IPC分类号： G01N29/34 , G01N29/036 , H04R1/42
摘要： Apparatus and methods for the measurement of gas volume fraction of produced oil are described. A first method measures the response of a pipe containing the produced oil excited by a source of vibration in the form of an acoustic frequency chirp containing a linearly varying range of frequencies in the tens of kilohertz range encompassing at least one resonant mode of the pipe. As the gas volume fraction increases, the location of the peak maximum of the measured frequency spectrum responsive to the excitation increases in frequency, and the height of the peak maximum increases, thereby permitting a linear calibration curve to be obtained. A second method measures the response of a pipe containing the produced oil to excitation by a continuous source of vibration having a chosen frequency above those which excite flexural vibrations in the pipe and simultaneously excite acoustic waves in the fluid contained in the pipe, known as the coincidence frequency. Gas present in the fluid will interrupt sound propagation or reverberation, thereby generating fluctuations in the amplitude of the measured vibrations of the pipe. The amplitude fluctuation level provides a measure of the gas volume present inside the pipe. A third method measures the response of a pipe containing the produced oil to excitation by a high-bandwidth, short pulse having a chosen center frequency above the coincidence frequency. Gas present in the fluid will interrupt pulse propagation, thereby generating fluctuations in the amplitude of the measured vibrations of the pipe.
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公开(公告)号：US20240181498A1
公开(公告)日：2024-06-06
申请号：US18571647
申请日：2022-06-24
CPC分类号： B06B1/0655 , G01N29/4436 , G01N29/4454
摘要： A method includes acoustically exciting a rotating component over a range of frequencies. The method further includes measuring the resulting frequency response of the rotating component in response to the acoustic excitation. The method also includes processing the frequency response to determine whether a frequency response has shifted in comparison a prior frequency response. The method includes determining an amount of wear and tear of the rotating component based on the determined shift in the frequency response.
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公开(公告)号：US11946834B1
公开(公告)日：2024-04-02
申请号：US17514945
申请日：2021-10-29
发明人： Ann Junghans , Eric Davis , Cristian Pantea , Rollin Lakis , Vlad Henzl
CPC分类号： G01N1/04 , G01N1/36 , G01N1/4077 , G01N21/658 , G01N33/227 , G01N2001/028 , G01N2001/4094
摘要： A method of sample collection includes collecting an analyte from a sampling surface using a rapidly curable liquid gel comprising one or more metal particles; co-aggregating the one or more metal particles from the rapidly curable liquid gel and the analyte from the sampling surface; and rapidly curing the rapidly curable liquid gel. The composition and sample preparation conditions may facilitate improved collection efficiency of analytes during environmental and forensic evidence sampling. In addition, the composition and sample preparation conditions may facilitate enhanced detection and identification of the analyte using e.g., Surface Enhanced Raman Spectrometry (SERS).
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公开(公告)号：US20190242851A1
公开(公告)日：2019-08-08
申请号：US16318862
申请日：2017-07-20
IPC分类号： G01N29/024 , G01N29/22
CPC分类号： G01N29/024 , G01H11/06 , G01N29/223 , G01N2291/043
摘要： Methods for noninvasive determination of acoustical properties of flowing in pipes having a large ratio (>10) of pipe diameter to wall thickness, and in highly attenuating fluids are described. When vibrations are excited on the outer surface of the wall of a pipe, the resulting vibrations propagate directly through the wall In a normal direction and through the pipe wall as guided waves, appearing on the opposite side of the pipe. This dual path propagation through pipes, where guided waves take the circumferential path in the wall of the pipe and may interfere with the time of-flight measurement obtained from the direct path through the fluid, is at least In part resolved by subtracting the signal from the guided wave from the combined signal, thereby permitting improved observation of the direct path propagation through the fluid.
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公开(公告)号：US20240183823A1
公开(公告)日：2024-06-06
申请号：US18571654
申请日：2022-06-24
CPC分类号： G01N29/043 , G01N29/30 , G01N29/38 , G01N29/4454 , G01N2291/02845 , G01N2291/102
摘要： A system includes an acoustic transmitter, an acoustic receiver, a memory component, and a processor. The acoustic transmitter transmits an acoustic signal into a material with an unknown moisture level and changes into an acoustic response signal after passing through the material. The acoustic receiver receives the acoustic response signal associated with the material with the unknown moisture level. The memory component stores data comprising moisture levels associated with acoustic speeds of acoustic response signals. The processor is coupled to the acoustic receiver and to the memory and determines a speed of the acoustic response signal associated with the material with the unknown moisture level, and further determines an actual moisture level of the unknown moisture level of the material by associating the speed of the acoustic response signal associated with the material with the unknown moisture level to the data in the memory component.
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公开(公告)号：US11879868B2
公开(公告)日：2024-01-23
申请号：US17321332
申请日：2021-05-14
CPC分类号： G01N29/12 , G01N29/07 , G01N29/225 , G01N29/2418 , G01N29/2437 , G01N29/27 , G01N29/46 , G06N20/00 , G01N2291/011 , G01N2291/023 , G01N2291/0289 , G01N2291/101
摘要： Techniques are provided for detecting wafer defects. Example techniques include exciting a wafer using an acoustic signal to cause the wafer to exhibit vibrations, measuring one or more of linear frequency response metrics or nonlinear frequency responses metrics associated with the vibrations, and identifying any defects in the wafer based at least in part on one or more of the linear frequency response metrics or nonlinear frequency responses metrics. In embodiments, the wafer includes bismuth telluride (Bi2Te3).
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公开(公告)号：US20210356435A1
公开(公告)日：2021-11-18
申请号：US17321332
申请日：2021-05-14
摘要： Techniques are provided for detecting wafer defects. Example techniques include exciting a wafer using an acoustic signal to cause the wafer to exhibit vibrations, measuring one or more of linear frequency response metrics or nonlinear frequency responses metrics associated with the vibrations, and identifying any defects in the wafer based at least in part on one or more of the linear frequency response metrics or nonlinear frequency responses metrics. In embodiments, the wafer includes bismuth telluride (Bi2Te3).
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公开(公告)号：US11567038B2
公开(公告)日：2023-01-31
申请号：US17035483
申请日：2020-09-28
发明人： Dipen N. Sinha , Cristian Pantea
摘要： Described are an apparatus, computer program product, and associated methods for shaped waveform acoustic interrogation of substances and materials to determine one or more properties of the materials or substances. In some embodiments, a shaped waveform is formed by summing two or more different waveforms and an acoustic wave is generated according to the shaped waveform. The acoustic wave is transmitted by one or more transmitting transducers through the substance or material and received by one or more receiving transducers. The shaped waveform acoustic wave can have a duration or a period that is less than about 20 μs and can comprise predetermined frequency content. Characteristics of the shaped waveform acoustic wave, as received at the receiving transducer(s), including characteristics such as amplitude, frequency, time of flight, etc., can be associated with said one or more properties of the substance or material to provide for real-time monitoring of these properties.
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公开(公告)号：US11474073B2
公开(公告)日：2022-10-18
申请号：US16318862
申请日：2017-07-20
IPC分类号： G01N29/024 , G01H11/06 , G01N29/22
摘要： Methods for noninvasive determination of acoustical properties of flowing in pipes having a large ratio (>10) of pipe diameter to wall thickness, and in highly attenuating fluids are described. When vibrations are excited on the outer surface of the wall of a pipe, the resulting vibrations propagate directly through the wall in a normal direction and through the pipe wall as guided waves, appearing on the opposite side of the pipe. This dual path propagation through pipes, where guided waves take the circumferential path in the wall of the pipe and may interfere with the time of-flight measurement obtained from the direct path through the fluid, is at least in part resolved by subtracting the signal from the guided wave from the combined signal, thereby permitting improved observation of the direct path propagation through the fluid.
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公开(公告)号：US10794865B2
公开(公告)日：2020-10-06
申请号：US15563603
申请日：2016-04-01
发明人： Dipen N. Sinha , Cristian Pantea
IPC分类号： G01N29/024 , G01F1/74
摘要： An apparatus and method for the separation of an oil-water mixture into its components are described. An acoustic radiation force moves oil droplets to the nodes of an acoustic standing wave generated in a vertical column containing the oil-water mixture. Once the droplets are sufficiently close together, attractive forces become dominant and the droplets may coalesce to form larger droplets, which have greater buoyancy, and separation of the mixture into a layer of oil and a layer of water occurs, not possible by simple gravitational separation. Acoustically-driven oil-water separation may be used for water-cut measurements in oil production wells, since separation of the oil from the water permits accurate sound speed measurements to be made for both the oil and the water, thereby allowing frequent in situ calibrations of the apparatus to determine whether sound speed measurements on the mixture are accurate in the event that one or both of the mixture constituents is changing.
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