公开(公告)号：US20230370310A1

公开(公告)日：2023-11-16

申请号：US18317032

申请日：2023-05-12

Applicant: NEC Laboratories America, Inc.

Inventor： Sarper OZHARAR ,  Yue TIAN ,  Yangmin DING ,  Zhuocheng JIANG ,  Ting WANG

IPC: H04L27/00 ,  H04B3/52 ,  G08C17/02

CPC classification number: H04L27/0002 ,  G08C17/02 ,  H04B3/52

Abstract: A radio-controlled, two-way acoustic modem for operating with a distributed fiber optic sensing (DFOS) system including circuitry that receives radio signals including configuration information, configures the modem to operate according to the configuration information, and generate acoustic signals that are detected by the DFOS system. The acoustic modem includes one or more sensors that detect environmental information that is encoded in the acoustic signals for further reception by the DFOS system. The received configuration information may change the operating times, sensors or other operating aspects of the modem as desired and such information may be transmitted from a fixed location or a mobile vehicle.

公开(公告)号：US20230179297A1

公开(公告)日：2023-06-08

申请号：US18075374

申请日：2022-12-05

Applicant: NEC Laboratories America, Inc.

Inventor： Philip JI ,  Ting WANG ,  Zilong YE

IPC: H04B10/032

CPC classification number: H04B10/032

Abstract: Aspects of the present disclosure describe distributed fiber optic sensor systems, methods, and structures that advantageously enable/provide for the proper placement/assignment of sensors in the DFOS network to provide for high reliability, fault tolerant operation that survives multiple fiber failures.

公开(公告)号：US20230145781A1

公开(公告)日：2023-05-11

申请号：US17978845

申请日：2022-11-01

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin DING ,  Sarper OZHARAR ,  Yue TIAN ,  Ting WANG

IPC: G01H9/00 ,  H04B10/80 ,  H04B10/2537

CPC classification number: G01H9/004 ,  H04B10/808 ,  H04B10/2537

Abstract: Remote terminal field device monitoring using distributed fiber optic sensing (DFOS) comprising a length of optical sensor fiber extending into the remote terminal, said remote terminal including one or more field devices located therein, wherein said length of optical sensor fiber located in the remote terminal includes one or more fiber loops formed in the length of optical sensor fiber, said one or more fiber loops respectively positioned proximate to the one or more field device(s) located in the remote terminal, a DFOS interrogator in optical communication with the optical sensor fiber and configured to generate optical pulses, introduce the generated pulses into the length of optical sensor fiber, and receive backscattered signals from the one or more fiber loops formed in the length of the optical sensor fiber, and an intelligent analyzer configured to analyze DFOS data received by the DFOS interrogator and determine from the backscattered signals, environmental activity occurring at the one or more fiber loops located within the remote terminal; operating the DFOS system and collecting/analyzing/reporting the environmental activity determined at the one or more fiber loops located within the remote terminal.

公开(公告)号：US20230130788A1

公开(公告)日：2023-04-27

申请号：US17958415

申请日：2022-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Sarper OZHARAR ,  Ting WANG ,  Yue TIAN ,  Yangmin DING ,  Philip JI ,  Shaobo Han ,  Ming-Fang Huang ,  Tingfeng Li

IPC: G01H9/00 ,  G01D5/353 ,  H04B10/071

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously sense/monitor outdoor facilities and structures including outdoor cabinets containing fiber optic facilities in which the cabinet/fiber optic cable contained therein are configured to provide superior acoustic sensing. Further outdoor facilities and structures that are monitored include manhole structures. Superior DFOS/DAS monitoring results are obtained by employing a machine learning-based analysis method that employs a temporal relation network (TRN).

公开(公告)号：US20220326052A1

公开(公告)日：2022-10-13

申请号：US17713167

申请日：2022-04-04

Applicant: NEC Laboratories America, Inc.

Inventor： Yue-Kai HUANG ,  Ezra IP ,  Ting WANG

IPC: G01D5/353 ,  H04B10/61 ,  H04B10/071

Abstract: Aspects of the present disclosure describe systems and methods that advantageously enable vibration-induced optical phase measurement at a centralized optical line terminal (OLT) in a PON architecture. In sharp contrast to existing distributed fiber sensing systems and methods, the optical phase measurements of the present disclosure do not rely on back scattering mechanisms and maintain a sufficient optical signal to noise ratio (OSNR) even after round-trip splitting loss in the PON.

公开(公告)号：US20220228948A1

公开(公告)日：2022-07-21

申请号：US17579511

申请日：2022-01-19

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang HUANG ,  Ting WANG

IPC: G01M11/00 ,  H04B10/071

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously extend DFOS techniques to anomaly detection using optical magnetism switches (OMC) that are integrated into the DFOS system.

公开(公告)号：US20220057254A1

公开(公告)日：2022-02-24

申请号：US17406022

申请日：2021-08-18

Applicant: NEC Laboratories America, Inc.

Inventor： Philip JI ,  Ting WANG ,  Zilong YE

IPC: G01H9/00 ,  G02F1/295 ,  G01D5/353

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that employ a distributed fiber optic sensor placement procedure that advantageously provides a desirable sensor coverage over a network at minimal cost.

公开(公告)号：US20210318182A1

公开(公告)日：2021-10-14

申请号：US17227314

申请日：2021-04-10

Applicant: NEC Laboratories America, Inc.

Inventor： Yaowen LI ,  Yue-Kai HUANG ,  Ting WANG

IPC: G01K11/324 ,  H04B10/2569

Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously achieve single mode fiber distributed temperature sensing (DTS) with improved noise characteristics by employing a polarization scrambler in its optical chain.

公开(公告)号：US20210318167A1

公开(公告)日：2021-10-14

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：US20210318166A1

公开(公告)日：2021-10-14

申请号：US17227336

申请日：2021-04-11

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin DING ,  Yue TIAN ,  Sarper OZHARAR ,  Ting WANG

IPC: G01H9/00 ,  G01D5/353

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).