公开(公告)号：US12160090B2

公开(公告)日：2024-12-03

申请号：US18492902

申请日：2023-10-24

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin Ding ,  Yuanda Xu ,  Sarper Ozharar ,  Yue Tian ,  Ting Wang

IPC: H02G1/02 ,  G01D5/353 ,  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).

公开(公告)号：US11733070B2

公开(公告)日：2023-08-22

申请号：US17684348

申请日：2022-03-01

Applicant: NEC LABORATORIES AMERICA, INC

Inventor： Yangmin Ding ,  Sarper Ozharar ,  Yue Tian ,  Ting Wang ,  Yuanda Xu

IPC: G01D5/353 ,  G01H9/00

CPC classification number: G01D5/35358 ,  G01H9/004

Abstract: Distributed fiber optic sensing (DFOS)/distributed acoustic sensing (DAS) techniques coupled with frequency domain decomposition (FDD) are employed to determine the presence of 120 HZ 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.

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

IPC: H02G1/02 ,  G01S19/01 ,  G01D5/353

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).

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

IPC: G01R31/08 ,  G01H9/00

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.

公开(公告)号：US11698290B2

公开(公告)日：2023-07-11

申请号：US17714091

申请日：2022-04-05

Applicant: NEC Laboratories America, Inc.

Inventor： Shaobo Han ,  Yue Tian ,  Sarper Ozharar ,  Yangmin Ding ,  Ting Wang

IPC: G01H9/00

CPC classification number: G01H9/004

Abstract: Systems and methods for operating a distributed fiber optic sensing (DFOS)/distributed acoustic sensing (DAS) system include a length of optical sensing fiber suspended aerially by a plurality of utility poles and in optical communication with a DFOS interrogator/analyzer. The method includes operating the DFOS/DAS system while manually exciting more than one of the poles to obtain frequency response(s) of the excited poles; contrastively training a convolutional neural network (CNN) with the frequency responses obtained; classifying the utility poles using the contrastively trained CNN; and generating a profile map of the excited poles indicative of the classified utility poles.

公开(公告)号：US11619541B2

公开(公告)日：2023-04-04

申请号：US17227325

申请日：2021-04-11

Applicant: NEC Laboratories America, Inc.

Inventor： Sarper Ozharar ,  Ting Wang

IPC: G01H9/00 ,  G08G1/01 ,  G08G1/017

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable and/or facilitate the continuous, real-time 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.

公开(公告)号：US12289132B2

公开(公告)日：2025-04-29

申请号：US18319457

申请日：2023-05-17

Applicant: NEC Laboratories America, Inc.

Inventor： Christopher White ,  Jian Fang ,  Sarper Ozharar ,  Ting Wang

IPC: H04B10/071 ,  H04B10/2575 ,  H04B11/00

Abstract: A method for time synchronization using distributed fiber optic sensing (DFOS) that employs several trusted time beacons that are attached to the DFOS sensing fiber which in turn is connected to the DFOS interrogator. The beacons transmit their signal via two different mediums, (1) wirelessly to sensor nodes in the coverage area, and (2) through vibrations on fiber to the DFOS/DAS system located at a trusted area such as the central office. Wireless broadcast to nearby sensors includes a timestamp and beacon ID. All the sensors in the field use one of the beacons in their vicinity (the one with the strongest signal) as their time reference and send the data back with the corresponding beacon index.

公开(公告)号：US12106664B2

公开(公告)日：2024-10-01

申请号：US17968265

申请日：2022-10-18

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin Ding ,  Yue Tian ,  Sarper Ozharar ,  Ting Wang

IPC: G08G1/04 ,  G01V1/00 ,  G01V1/22 ,  G01V1/30 ,  G08G1/01

CPC classification number: G08G1/04 ,  G01V1/001 ,  G01V1/226 ,  G01V1/30 ,  G08G1/0104

Abstract: Aspects of the present disclosure describe dynamic road traffic noise mapping using DFOS over a telecommunications network that enables mapping of road traffic-induced noise at any observer location. DFOS is used to obtain instant traffic data including vehicle speed, volume, and vehicle types, based on vibration and acoustic signal along the length of a sensing fiber along with location information. A sound pressure level at a point of interest is determined, and traffic data associated with such point is incorporated into a reference noise emission database and a wave propagation theory for total sound pressure level prediction and mapping. Real-time wind speed using DFOS—such as distributed acoustic sensing (DAS)—is obtained to provide sound pressure adjustment due to the wind speed.

公开(公告)号：US11619542B2

公开(公告)日：2023-04-04

申请号：US17228675

申请日：2021-04-12

Applicant: NEC Laboratories America, Inc.

Inventor： Sarper Ozharar ,  Yue Tian ,  Yangmin Ding ,  Ting Wang

IPC: G01H9/00

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 determination of natural frequency(ies) of civil infrastructures.

公开(公告)号：US20250146861A1

公开(公告)日：2025-05-08

申请号：US18917504

申请日：2024-10-16

Applicant: NEC Laboratories America, Inc.

Inventor： Zhuocheng Jiang ,  Yue Tian ,  Yangmin Ding ,  Sarper Ozharar ,  Yanchao Wang ,  Ting Wang

IPC: G01H9/00 ,  G01R31/62

Abstract: Systems and methods include collecting vibration data along an optical fiber cable using distributed acoustic sensing (DAS). The collected vibration data is preprocessed to separate the vibration data into at least two mixtures. The at least two mixtures are combined into a mixture of mixtures. The mixture of mixtures is separated into a plurality of estimated source signals using a separation model. The separation model is trained using an unsupervised loss computed between the estimated source signals and the at least two mixtures.