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1.发明申请
公开(公告)号：WO2022216872A1
公开(公告)日：2022-10-13
申请号：PCT/US2022/023733
申请日：2022-04-06
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HAN, Shaobo , TIAN, Yue , OZHAHAR, Sarper , DING, Yangmin , WANG, Ting
IPC: G01H9/00 , G01D5/353 , G01S5/16 , G02B6/44 , G02B6/48 , G06N3/04 , G06N3/08 , H04B10/27 , G02B6/12
Abstract: A testing procedure including a data collection procedure and a contrastive learning-based approach, for establishing a profile for utility poles surveyed in an embedding space. Unique properties of utility poles are preserved in a low-dimensional feature vector. Similarities between pairs of samples collected at the same or different poles is reflected by the Euclidean distance between the pole embeddings. During data collection - variabilities of excitation signals are manually introduced, e.g. impact strength, impact locations, impact time ambiguity, data collecting location ambiguity on a DFOS/DAS optical sensor fiber/cable. Data so collected provides a learned model learned complete information about a utility pole and is more robust with respect to uncontrollable factors during operation..
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2.发明申请
公开(公告)号：WO2022216998A1
公开(公告)日：2022-10-13
申请号：PCT/US2022/023928
申请日：2022-04-07
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： TIAN, Yue , OZHAHAR, Sarper , DING, Yangmin , HAN, Shaobo , WANG, Ting
Abstract: A system and method to assess utility pole integrity, by using existing telecom fiber optic cable as a sensor cable, instant mechanical impact on the pole(s), DAS technology and a machine learning model. An instant mechanical impact creates a vibration event on the optical fiber cable mounted/suspended on a target pole, which is detected/recorded by DAS. By applying a machine learning model on the DAS signals, the target poles integrity condition is obtained.
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3.发明申请
公开(公告)号：WO2021211394A1
公开(公告)日：2021-10-21
申请号：PCT/US2021/026767
申请日：2021-04-12
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： DING, Yangmin , TIAN, Yue , OZHAHAR, Sarper , WANG, Ting
Abstract: An advance in the art is made according to aspects of the present disclosure directed to distributed fiber optic sensing systems (DFOS), methods, and structures that advantageously provide the continuous monitoring of aerial cables using distributed acoustic sensing (DAS) and operational modal analysis (OMA).
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4.发明申请
公开(公告)号：WO2023004085A1
公开(公告)日：2023-01-26
申请号：PCT/US2022/037943
申请日：2022-07-21
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： DING, Yangmin , OZHAHAR, Sarper , TIAN, Yue , WANG, Ting , XU, Yuanda
Abstract: Systems, and methods for monitoring galloping of overhead transmission lines using distributed fiber optic sensing (DFOS) in combination with frequency domain decomposition (FDD) (frequency domain) algorithms/methods. A DFOS interrogator / analyzer is used to collect real-time data for pre-processing. The pre-processed data is further processed by processing algorithms, which provide results to a graphical user interface or other reporting mechanisms that provide real-time monitoring, alarming, and reporting of the galloping status of the overhead transmission lines.
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5.发明申请
公开(公告)号：WO2021211391A1
公开(公告)日：2021-10-21
申请号：PCT/US2021/026761
申请日：2021-04-11
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： DING, Yangmin , TIAN, Yue , OZHAHAR, Sarper , WANG, Ting
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable and/or facilitate the continuous monitoring and identification of damaged utility poles by employing a DFOS distributed acoustic sensing (DAS) methodology in conjunction with a finite element analysis and operational modal analysis. Of particular advantage and in further contrast to the prior art, systems, methods, and structures according to aspects of the present disclosure utilize existing optical fiber supported/suspended by the utility poles as a sensing medium for the DFOS / DAS operation.
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Patent Agency Ranking6.发明申请
公开(公告)号：WO2022159906A1
公开(公告)日：2022-07-28
申请号：PCT/US2022/013760
申请日：2022-01-25
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： OZHAHAR, Sarper , DING, Yangmin , TIAN, Yue , WANG, Ting
Abstract: An advance in the art is made according to aspects of the present disclosure directed to the detection and localization of a substantially static weight situated on aerial telecommunications fiber optic cable through the effect of phase-distributed acoustic sensing ( -DAS) and signal analysis of ambient data. In sharp contrast to the prior art, our inventive method does not require a special optical fiber arrangement or type of fiber nor is it susceptible to range limitations that plague the prior art.
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7.发明申请
公开(公告)号：WO2021211396A1
公开(公告)日：2021-10-21
申请号：PCT/US2021/026770
申请日：2021-04-12
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： OZHAHAR, Sarper , WANG, Ting
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable and/or facilitate the continuous, realtime monitoring and identification vehicle speed, vehicle direction, vehicle axle width, vehicle type, total number of vehicle axles, and vehicle count. The DFOS sensing fiber is advantageously positioned underneath a roadway/highway in a novel arrangement/layout and temporal measurements are made to provide vehicle identification
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8.发明申请
公开(公告)号：WO2021211395A1
公开(公告)日：2021-10-21
申请号：PCT/US2021/026769
申请日：2021-04-12
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： OZHAHAR, Sarper , TIAN, Yue , DING, Yangmin , WANG, Ting
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) distributed acoustic sensing (DAS) based systems, methods, and structures that advantageously enable and/or facilitate the monitoring of civil infrastructures via acoustic wave speed measurements
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公开(公告)号：WO2022187552A1
公开(公告)日：2022-09-09
申请号：PCT/US2022/018792
申请日：2022-03-03
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： DING, Yangmin , OZHAHAR, Sarper , TIAN, Yue , WANG, Ting , XU, Yuanda
Abstract: Distributed fiber optic sensing (DFOS) / distributed acoustic sensing (DAS) techniques coupled with frequency domain decomposition (FDD) are employed to determine the presence of 120HZ operating power frequency to determine when street lights are energized and on thereby providing continuous status monitoring of the operational status of street lights and locating affected street lights at a particular utility pole location.
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公开(公告)号：WO2022087012A1
公开(公告)日：2022-04-28
申请号：PCT/US2021/055675
申请日：2021-10-19
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： TIAN, Yue , HAN, Shaobo , OZHAHAR, Sarper , DING, Yangmin , LU, You
Abstract: Aspects of the present disclosure describe the localization of a utility pole by distributed fiber sensing of aerial fiber cable suspended from the utility pole
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