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公开(公告)号：US20250148294A1
公开(公告)日：2025-05-08
申请号：US18922807
申请日：2024-10-22
Applicant: NEC Laboratories America, Inc.
Inventor： Philip Ji , Shaobo Han , Ting Wang
Abstract: Systems and methods include calibrating physical parameters of acoustic data using a deterministic model related to hardware configurations that generated the acoustic data to provide an intermediate layer of data. The intermediate layer of data is then calibrated using environmental factors related to the acoustic data by employing machine learning to provide a multichannel data output. A loss is optimized between the multichannel data output and multichannel distributed-optic fiber sensing (DFOS) data to train a hybrid transfer model to translate between DFOS data and acoustic data.
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公开(公告)号：US20250146863A1
公开(公告)日：2025-05-08
申请号：US18930454
申请日：2024-10-29
Applicant: NEC Laboratories America, Inc.
Inventor： Jian Fang , Wataru Kohno , Ting Wang
IPC: G01H9/00
Abstract: Methods and systems for acoustic sensing include determining sensing locations along a fiber to generate a beam pattern that is directed to an acoustic source. An optical pulse is transmitted on the fiber. Optical phase of backscattering light is measured from the sensing locations on the fiber. An output signal is generated by combining the measured optical phase according to the beam pattern.
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公开(公告)号：US20250146862A1
公开(公告)日：2025-05-08
申请号：US18924340
申请日：2024-10-23
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang
IPC: G01H9/00 , G01D5/353 , H04B10/079
Abstract: Systems and methods for cable inspection using optical fiber sensing includes a hardware processor and a memory storing a computer program which, when executed by the hardware processor, causes the hardware processor to collect data from a fiber optic cable and analyze the data with a distributed fiber optic sensing (DFOS) system. Losses and anomalies and their locations are identified in the cable. An alert is generated based on the losses and anomalies.
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公开(公告)号：US12154007B2
公开(公告)日：2024-11-26
申请号：US16229676
申请日：2018-12-21
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang
Abstract: A fiber-based roadside condition sensing system is provided. The system includes a fiber optic cable arranged in various roadside locations for Distributed Vibration Sensing (DVS) and Distributed Acoustic Sensing (DAS) at the various roadside locations. The system further includes a machine-learning-based analyzer for selectively providing any of an early warning and a prevention of various detected conditions responsive to a machine-learning-based analysis of results from the DVS and the DAS.
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公开(公告)号：US12111189B2
公开(公告)日：2024-10-08
申请号：US17221822
申请日：2021-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang , Shaobo Han
CPC classification number: G01D5/353 , G01D5/35361 , G01D5/35364 , G01H9/004 , G06V20/58 , G08B21/18
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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Patent Agency Ranking
公开(公告)号：US12047242B2
公开(公告)日：2024-07-23
申请号：US18481988
申请日：2023-10-05
Applicant: NEC Laboratories America, Inc.
IPC: H04L41/0896 , H04L41/122
CPC classification number: H04L41/0896 , H04L41/122
Abstract: Described is a novel framework, we call intent-based computing jobs assignment framework, for efficiently accommodating a clients' computing job requests in a mobile edge computing infrastructure. We define the intent-based computing job assignment problem, which jointly optimizes the virtual topology design and virtual topology mapping with the objective of minimizing the total bandwidth consumption. We use the Integer Linear Programming (ILP) technique to formulate this problem, and to facilitate the optimal solution. In addition, we employ a novel and efficient heuristic algorithm, called modified Steiner tree-based (MST-based) heuristic, which coordinately determines the virtual topology design and the virtual topology mapping. Comprehensive simulations to evaluate the performance of our solutions show that the MST-based heuristic can achieve an efficient performance that is close to the optimal performance obtained by the ILP solution.
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公开(公告)号：US20240235668A1
公开(公告)日：2024-07-11
申请号：US18485198
申请日：2023-10-11
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang HU , Yue-Kai HUANG , Ting Wang
IPC: H04B10/073 , G01H9/00
CPC classification number: H04B10/073 , G01H9/004
Abstract: A fast optical fiber identification system and method employing an acoustic pen that is connected to a portable device (such as a laptop, a smartphone, an iPad). The pen generates acoustic signals under the control of the portable device. The portable device interacts with a DFOS (Distributed Fiber Optic Sensor, e.g., a DAS or DVS) interrogator to notify the interrogator about the generated signals and receives a detection result from the interrogator. The result is either illustrated using a graph on the portable device, or as a tone of different volume, to indicate the strength of the pen's signal detected by the interrogator. As the pen touches/excites vibrationally/acoustically each of the fibers, the portable device notifies the user about the detected signal's strength or presence/no-presence, which allows a technician to quickly identify the fiber of interest.
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公开(公告)号：US12028110B2
公开(公告)日：2024-07-02
申请号：US17713171
申请日：2022-04-04
Applicant: NEC Laboratories America, Inc.
CPC classification number: H04B10/27 , H04Q11/0062 , H04Q2011/009
Abstract: A procedure to solve the DFOS placement problem that uses a genetic algorithm to achieve a global optimization of sensor placement. First, our procedure according to aspects of the present disclosure defines a fitness function that counts the number of DFOS sensors used. Second, the procedure uses a valid DFOS placement assignment to model an individual in the genetic algorithm. Each individual consists of N genes, where N is the number of nodes in the given network infrastructure, e.g., N=|V|. Each gene has two genomes: (1) a list of 0s and/or 1s, in which is represent the network nodes that are equipped with DFOS sensors, and 0s represent the nodes that are not equipped with DFOS sensors; (2) a list of sensing fiber routes. An individual that has smallest number of is in their genes will be considered as the strongest individual. Thirdly, the procedure randomly generates a population of individuals. After a certain number of generations of population, the strongest individual in the last generation will be the global optima for the DFOS placement assignment.
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公开(公告)号：US11881688B2
公开(公告)日：2024-01-23
申请号：US17717088
申请日：2022-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Sarper Ozharar , Yuandu Xu , Yue Tian , Ting Wang
CPC classification number: H02G1/02 , G01D5/35354 , G01S19/01
Abstract: Systems and methods for performing the dynamic anomaly localization of utility pole aerial/suspended/supported wires/cables by distributed fiber optic sensing. In sharp contrast to the prior art, our inventive systems and methods according to aspects of the present disclosure advantageously identify a “location region” on a utility pole supporting an affected wire/cable, thereby permitting the identification and reporting of service personnel that are uniquely responsible for responding to such anomalous condition(s).
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10.发明授权公开(公告)号：US11754612B2
公开(公告)日：2023-09-12
申请号：US17719322
申请日：2022-04-12
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Sarper Ozharar , Yue Tian , Ting Wang
CPC classification number: G01R31/085 , G01H9/004
Abstract: Distributed fiber optic sensing (DFOS) systems and methods for monitoring electrical power distribution transformers and locating failing/failed/malfunctioning transformers from humming signals indicative of a transformer's operational integrity and are advantageously detected/analyzed via DFOS mechanisms.
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