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公开(公告)号：US20240310538A1
公开(公告)日：2024-09-19
申请号：US18183671
申请日：2023-03-14
发明人： David Verl Brower
摘要： Disclosed herein are systems and methods configured to produce and monitor signals that characterize activities corresponding to intruders (e.g., persons and/or animals) traversing a boundary that at least partially defines a designated area. Such activities can characterize one or more persons traversing a boundary or attempting to traverse a barrier that defines the boundary. Sensors within a substrate that extends along the boundary can be used for producing such signals. The substrate can be soil of which ground at the boundary is comprised, a manmade material located within such soil or a material from which a barrier along the boundary is constructed. The sensors can be fiber optic sensors that extend contiguously along a length of the boundary and/or can be fiber optic sensors that are located at discrete locations along the length of the boundary. The signals can cause one or more responsive actions to be implemented.
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2.发明公开公开(公告)号：US20240241275A1
公开(公告)日：2024-07-18
申请号：US18414419
申请日：2024-01-16
发明人： Shaobo HAN , Yuheng CHEN , Ming-Fang HUANG , Tingfeng LI
CPC分类号： G01V1/288 , G01V1/001 , G01V1/226 , G08G1/0104
摘要： Disclosed are machine learning (ML) based Distributed Fiber Optic Sensing (DFOS) systems, methods, and structures for Sonic Alert Pattern (SNAP) event detection performed in real time including an intelligent SNAP informatic system in conjunction with DFOS/Distributed Acoustic Sensing (DAS) and machine learning technologies that utilize SNAP vibration signals as an indicator. Without installation of additional sensors, vibration signals indicative of SNAP events are detected along a length of an existing optical fiber through DAS. Raw DFOS data is utilized—and not DFOS waterfall data—resulting in faster and more accurate information derivation as rich, time-frequency information in the raw DFOS/DAS waveform data is preserved. A deep learning module Temporal Relation Network (TRN) that accurately detects SNAP events from among chaotic signals of normal traffic is employed, making it reliable when applied to busy roads with dense traffic and vehicles of different speed.
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公开(公告)号：US20240201415A1
公开(公告)日：2024-06-20
申请号：US18287216
申请日：2022-06-30
发明人： Yanpeng LI , Congwei LIU , Yanbin ZHANG
摘要： Disclosed are an improved method and device for calibrating the depth of an optical fibre in a well. The method includes acquiring borehole seismic wave field data based on an optical fibre acoustic wave sensor; determining first arrival time information based on the borehole seismic wave field data; determining a downgoing wave first arrival amplitude based on the first arrival time information and the borehole seismic wave field data; determining an optical fibre amplitude feature point based on the downgoing wave first arrival amplitude; determining a wellhead initial position and a receiving point spacing of the optical fibre in the well based on the optical fibre amplitude feature point and logging curve feature points; and determining depth calibration information of the optical fibre in the well based on the wellhead initial position and the receiving point spacing.
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公开(公告)号：US20240184006A1
公开(公告)日：2024-06-06
申请号：US18065192
申请日：2022-12-13
发明人： Seyed Ehsan JALILIAN , Yuhong LIU
摘要： Methods, systems, and techniques for wind detection. A first acoustic signal generated by an acoustic sensor positioned to be actuated in response to wind is measured. An average value of the first acoustic signal over a sampling duration is determined. The average value may be a median, and the sampling duration may be at least 15 minutes. If the average value of the first acoustic signal satisfies a wind detection threshold, the first acoustic signal is determined to be generated by the wind.
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5.发明公开公开(公告)号：US20240159928A1
公开(公告)日：2024-05-16
申请号：US18513937
申请日：2023-11-20
申请人： IONOTERRA Ltd.
发明人： Nathan Blaunstein
摘要： A method of predicting parameters of an earthquake uses an array of ionosondes to scan an observed volume of an ionosphere located above a seismically active zone. The method includes monitoring ionograms provided by the array of ionosondes; detecting the presence of at least one seismic-induced irregularity (SII); determining a first predicted parameter corresponding to an epicenter location; and determining one or more predicted parameters selected from a group consisting of a magnitude, a time of occurrence, and a hypocenter depth. Algorithms for calculating the predicted parameters are presented in detail.
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6.发明公开公开(公告)号：US20240142647A1
公开(公告)日：2024-05-02
申请号：US18280196
申请日：2021-03-05
申请人： NEC Corporation
发明人： Yutaka Yano
摘要： An environment information acquisition apparatus (400) according to the present disclosure includes an information acquisition unit (410) configured to receive, from an optical fiber (500), an optical signal including a pattern in accordance with environment information applied to the optical fiber (500) and acquire the environment information based on the optical signal; an information provision unit (430) configured to output measurement data representing the environment information to outside; and a detection unit (420) configured to detect vibration or sound applied to the information acquisition unit (410).
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公开(公告)号：US20240134076A1
公开(公告)日：2024-04-25
申请号：US18390981
申请日：2023-12-20
申请人： EXFO Inc.
发明人： Hongxin CHEN , Normand CYR
摘要： There is provided a method and an apparatus of fiber optic distributed acoustic sensing (DAS) which use a simple, reliable and robust signal processing for amplitude-based DAS measurements. 1) The lack of linearity of the amplitude-based DAS measurements (due to its unpredictable variation of the transfer function along the fiber) can be improved by normalizing the amplitude vs distance using an amplitude-normalization trace obtained from either a) coherent laser OTDR measurements with laser frequency dithering or b) computing a normalization trace from the coherent OTDR/DAS traces and the un-coherent OTDR/DAS traces. 2) Instrument offset (e.g., due to low vertical sampling resolution) may further be corrected using un-coherent OTDR/DAS traces to extract an instrument system offset.
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8.发明授权公开(公告)号：US11960041B2
公开(公告)日：2024-04-16
申请号：US18213659
申请日：2023-06-23
发明人： Bradley I. Meier , Evan M. Glassman
IPC分类号： G01V1/22 , G01V1/00 , G01V1/16 , G01W1/02 , G06Q20/08 , H04W76/10 , G01P1/07 , G01P5/00 , H04W4/80 , H04W84/12
CPC分类号： G01V1/223 , G01V1/008 , G01V1/162 , G01W1/02 , G06Q20/085 , H04W76/10 , G01P1/07 , G01P5/00 , H04W4/80 , H04W84/12
摘要： A system for collecting and managing parametric data via an external communications network comprises one or more parametric stations operatively connected via the external network to a certification server and a payout server. Each parametric station is configured to receive parametric data from a remote source, determine that the parametric data satisfies a predetermined condition, and transmit the parametric data over the external network to the certification server in response to the parametric data satisfying the predetermined condition. The certification server is configured to generate a certification report based on the parametric data and a data model related to the remote source and transmit the generated certification report to the payout server. The payout server is configured to determine that terms of an associated contract are satisfied based on the certification report, and trigger a payout based on the terms that are satisfied based on the certification report.
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9.发明授权公开(公告)号：US11953639B2
公开(公告)日：2024-04-09
申请号：US17697712
申请日：2022-03-17
发明人： Yijing Fan , Hsu-Hsiang Wu , Jin Ma , Li Pan
摘要： Some aspects relate to techniques for calibrating a logging tool. In some implementations, the logging tool may estimate certain unknown properties of a signal based on distances between transmitters and receivers of the logging tool and based on frequencies used by the transmitters and receivers. The logging tool may estimate the unknown properties by interpolating values into a mathematical function related to the above-noted distances and frequencies. After estimating the unknown properties, the logging tool may be deployed into the wellbore, where it may use the estimated properties to process signals received through a subsurface formation.
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公开(公告)号：US11940583B2
公开(公告)日：2024-03-26
申请号：US17534630
申请日：2021-11-24
CPC分类号： G01V1/42 , E21B47/135 , G01H9/004 , G01V1/201 , G01V1/226 , G01V1/48 , G01V1/52 , G01V2210/121 , G01V2210/1234 , G01V2210/1429 , G01V2210/161 , G01V2210/324
摘要： Various embodiments include apparatus and methods implemented to take into consideration gauge length in optical measurements. In an embodiment, systems and methods are implemented to interrogate an optical fiber disposed in a wellbore, where the optical fiber is subjected to seismic waves, and to generate a seismic wavefield free of gauge length effect and/or to generate a prediction of a seismic wavefield of arbitrary gauge length, based on attenuation factors of a plurality of wavefields acquired from interrogating the optical fiber. In an embodiment, systems and methods are implemented to interrogate an optical fiber disposed in a wellbore, where the optical fiber is subjected to seismic waves, and to convert a seismic wavefield associated with a first gauge length to a seismic wavefield associated with a different gauge length that is a multiple of the first gauge length. Additional apparatus, systems, and methods are disclosed.
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