公开(公告)号：WO2022046951A1

公开(公告)日：2022-03-03

申请号：PCT/US2021/047623

申请日：2021-08-25

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： HAN, Shaobo ,  HUANG, Ming-Fang ,  CHEN, Yuheng ,  SALEMI, Milad ,  WANG, Ting ,  AONO, Yoshiaki ,  XIA, Tiejun ,  WELLBROCK, Glenn

IPC: G01H9/00 ,  G01D5/353 ,  G01N29/24

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable anomaly detection resulting from construction or other activity based on image processing that may advantageously detect / notify / prevent damage to a fiber optic network infrastructure before such damage occurs.

公开(公告)号：WO2023004084A1

公开(公告)日：2023-01-26

申请号：PCT/US2022/037941

申请日：2022-07-21

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： HUANG, Ming-Fang ,  HAN, Shaobo ,  CHEN, Yuheng ,  SALEMI, Milad ,  WANG, Ting

IPC: G01V11/00 ,  G01V1/00

Abstract: Systems, and methods for automatically identifying an underground optical fiber cable length from DFOS systems in real time and pair it with GPS coordinates that advantageously eliminate the need for in-field inspection / work by service personnel to make such real-time distance / location determinations. As such, inefficient, error-prone and labor-intensive prior art methods are rendered obsolete. Operationally, our method disclosure involves driving vehicles including GPS to generate traffic patterns and automatically mapping traffic trajectory signals from a deployed buried fiber optic cable to locate geographic location(s) of the buried fiber optic cable. Traffic patterns are automatically recognized; slack in the fiber optic cable is accounted for; location of traffic lights and other traffic control devices/structures may be determined; and turns in the fiber optic cable may likewise be determined.

公开(公告)号：WO2022155401A1

公开(公告)日：2022-07-21

申请号：PCT/US2022/012411

申请日：2022-01-14

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： HAN, Shaobo ,  HUANG, Ming-Fang ,  JI, Philip ,  CHEN, Yuheng ,  SALEMI, Milad

IPC: G08G1/01 ,  G01H9/00 ,  G01D5/353

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

公开(公告)号：WO2022140485A1

公开(公告)日：2022-06-30

申请号：PCT/US2021/064753

申请日：2021-12-21

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： SALEMI, Milad ,  HAN, Shaobo ,  HUANG, Ming-Fang ,  CHEN, Yuheng

IPC: G01H9/00 ,  G01D5/353 ,  G08B21/18

Abstract: Distributed fiber optic sensing (DFOS) systems, methods and structures for determining the proximity of vibration sources located perpendicular to a sensor fiber that is part of the DFOS system that may potentially threaten / damage or otherwise compromise the sensor fiber itself. Systems, methods, and structures according to aspects of the present disclosure employ Artificial Intelligence (AI) methodology(ies) that use as input a fundamental physical understanding of wave propagation and attenuation in the ground along with Bayesian inference and Maximum Likelihood Estimation (MLE) techniques for estimating / determining the proximity of potentially damaging vibration sources to the optical sensor fiber.

公开(公告)号：WO2020257167A1

公开(公告)日：2020-12-24

申请号：PCT/US2020/037889

申请日：2020-06-16

Applicant: NEC LABORATORIES AMERICA, INC. ,  NEC CORPORATION

Inventor： HUANG, Ming-Fang ,  SALEMI, Milad

IPC: G08G1/04 ,  G06Q50/30

Abstract: Aspects of the present disclosure describe systems, methods and structures providing wide-area traffic monitoring based on distributed fiber-optic sensing (DFOS) that employs deep neural network(s) for denoising noisy waterfall traces measured by the DFOS. Such systems, methods, and structures according to aspects of the present disclosure may advantageously monitor multiple highways/roadways using a single interrogator and optical fiber switch(es) which provides traffic information along every sensing point of existing, deployed, in-service optical telecommunications facilities.