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11.发明申请公开(公告)号：US20220230539A1
公开(公告)日：2022-07-21
申请号：US17575610
申请日：2022-01-13
Applicant: NEC Laboratories America, Inc.
Inventor： Shaobo HAN , Ming-Fang HUANG , Philip JI , Yueheng CHEN , Milad SALEMI
Abstract: Aspects of the present disclosure describe DFOS systems, methods, and structures that advantageously extract road traffic from DFOS vibration patterns such that anomaly detection is possible. Sensed vibration data is represented accurately as a set of points, where each point is denoted as a tuple with elements indicating a time stamp, a location along a length of a DFOS optical sensing cable, and vibration strength detected at the location at the time. Traffic pattern detection is based on a progressive probabilistic Hough transform (PPHT) that exploits global information from an entire spatial-temporal data snapshot to assess a cause of detected vibrations.
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公开(公告)号：US20210360029A1
公开(公告)日：2021-11-18
申请号：US17320187
申请日：2021-05-13
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG
IPC: H04L29/06 , H04B10/077 , H04B10/50
Abstract: Aspects of the present disclosure describe physical layer security in optical telecommunications networks wherein a filtering-based physical security is provided by a wavelength tunable distributed fiber optical sensing (DFOS) system operating simultaneously on the telecommunications network.
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公开(公告)号：US20210310858A1
公开(公告)日：2021-10-07
申请号：US17195544
申请日：2021-03-08
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously are employed in smart stadium or other venue applications, such applications including: parking lot security and management; intrusion detection; social sensing; air quality monitoring and early fire detection—among others.
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公开(公告)号：US20210310836A1
公开(公告)日：2021-10-07
申请号：US17196939
申请日：2021-03-09
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG , Tiejun XIA , Glenn WELLBROCK , Yoshiaki AONO
Abstract: Aspects of the present disclosure describe hybrid distributed fiber optic sensing systems, methods, and structures that advantageously are extensions of existing fiber optic infrastructure and provide distributed fiber optic sensing (DFOS) functionality to the existing infrastructure.
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公开(公告)号：US20240134074A1
公开(公告)日：2024-04-25
申请号：US18485187
申请日：2023-10-11
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Chaitanya Prasad NARISETTY
CPC classification number: G01V1/001 , G01C21/3848 , H04L41/145
Abstract: An AI-driven cable mapping system that employs distributed fiber optic sensing (DFOS) fiber sensing and machine learning that provides autonomous determination of fiber optic cable location and mapping of same. Designed Al algorithms operating within our inventive systems and methods provide an easy solution for cable mapping in a GIS system; automatically maps using landmarks and manhole locations; and employs a supervised learning algorithm. A vehicle-assist operation is employed wherein a vehicle carries a Global Positioning System (GPS) device and drives along a roadway thereby following the fiber optic cable route; data paring that provides further significant locational information wherein time synchronizes between the DFOS system and vehicle GPS device from which we automatically pair the data of fiber length from traffic trajectories and GPS coordinates by time series.
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Patent Agency Ranking
16.发明公开公开(公告)号：US20240125962A1
公开(公告)日：2024-04-18
申请号：US18485247
申请日：2023-10-11
Applicant: NEC Laboratories America, Inc.
Inventor： Yifan WU , Ming-Fang HUANG , Shaobo HAN , Jian FANG , Yuheng CHEN , Yaowen LI , Mohammad KHOJASTEPOUR
CPC classification number: G01V1/375 , G01H9/004 , G01V1/305 , G01V1/307 , G01V8/24 , G01V2210/21 , G01V2210/48 , G01V2210/65 , G01V2210/667 , G01V2210/67 , G01V2210/72 , G01V2210/74
Abstract: Method for source localization for cable cut prevention using distributed fiber optic sensing (DFOS)/distributed acoustic sensing (DAS) is described that is robust/immune to underground propagation speed uncertainty. The method estimates the location of a vibration source while considering any uncertainty of vibration propagation speed and formulates the localization as an optimization problem, and both location of the sources and the propagation speed are treated as unknown. This advantageously enables our method to adapt to variances of the velocity and produce a better generalized performance with respect to environmental changes experienced in the field. Our method operates using a DFOS system and AI techniques as an integrated solution for vibration source localization along an entire optical sensor fiber cable route and process real-time DFOS data and extract features that are related to a location of a source of vibrations that may threaten optical fiber facilities.
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公开(公告)号：US20230152150A1
公开(公告)日：2023-05-18
申请号：US17987007
申请日：2022-11-15
Applicant: NEC Laboratories America, Inc.
Inventor： Yuheng CHEN , Ming-Fang HUANG , Ting WANG , Jingnan ZHAO
Abstract: A fiber optic sensing cable located along a side of a paved road and runs parallel to a driving direction is monitored by distributed fiber optic sensing (DFOS) using Rayleigh backscattering generated along the length of the optical sensor fiber cable under dynamic vehicle loads. The interaction of vehicles with roadway locations exhibiting distressed pavement generates unique patterns of localized signals that are identified/distinguished from signals resulting from vehicles operating on roadway exhibiting a smooth pavement surface. Machine learning methods are employed to estimate an overall road surface quality as well as localizing pavement damage. Power spectral density estimation, principal component analysis, support vector machine (SVM) combined with principal component analysis (PCA), local binary pattern (LBP), and convolutional neural network (CNN) are applied to develop the machine learning models.
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公开(公告)号：US20220333956A1
公开(公告)日：2022-10-20
申请号：US17720245
申请日：2022-04-13
Applicant: NEC Laboratories America, Inc.
Inventor： Shaobo HAN , Ming-Fang HUANG , Yuheng CHEN , Philip JI , Ting WANG
Abstract: Distributed fiber optic sensing (DFOS) systems and methods that automatically detect vibration signal patterns from waterfall data recorded by DFOS system operations in real- time and associate the detected vibration signal patterns to GPS location coordinates without human intervention or interpretation. When embodied as a computer vision-based operation according to aspects of the present disclosure, our inventive systems and method provide accurate, cost-efficient, and objective determination without relying on humans and their resulting bias' and inconsistencies.
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公开(公告)号：US20220316921A1
公开(公告)日：2022-10-06
申请号：US17221822
申请日：2021-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG , Shaobo HAN
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously identify location(s) of construction—or other activities—taking place along fiber optic cable routes that can damage the fiber optic cables.
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公开(公告)号：US20210318180A1
公开(公告)日：2021-10-14
申请号：US17227309
申请日：2021-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable smart refrigeration systems including retail.
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