公开(公告)号：US10931366B2

公开(公告)日：2021-02-23

申请号：US16830160

申请日：2020-03-25

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Ming-Fang Huang ,  Tiejun Xia ,  Glenn Wellbrock ,  Yaowen Li ,  Philip Ji

IPC: H04B10/071 ,  G01M11/00 ,  G01D5/353 ,  H04B10/40 ,  H04B10/2575 ,  H04B10/27

Abstract: Aspects of the present disclosure describe optical fiber sensing systems, methods and structures disclosing a distributed fiber sensor network constructed on an existing, live network, data carrying, optical fiber telecommunications infrastructure to detect temperatures, acoustic effects, and vehicle traffic—among others. Of particular significance, sensing systems, methods, and structures according to aspects of the present disclosure may advantageously identify specific network locations relative to manholes/handholes and environmental conditions within those manholes/handholes namely, normal, flooded, frozen/iced, etc.

公开(公告)号：US11686602B2

公开(公告)日：2023-06-27

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

IPC: G01H9/00 ,  G01D5/353 ,  G01K11/32 ,  H04B10/25

CPC classification number: G01D5/35338 ,  G01H9/004 ,  G01K11/32 ,  H04B10/25

Abstract: A method of providing a hybrid distributed fiber optic sensing system (DFOS) that extends an existing fiber optic telecommunications network thereby providing that existing fiber optic telecommunications network with DFOS capabilities. The method provides a length of fiber optic cable, wherein said fiber optic cable conveys communications traffic; provides a DFOS interrogator system in optical communication with the communications fiber optic cable; extends the length of communications fiber optic cable with first and second lengths of fiber optic sensory cable, and operates the DFOS interrogator system such that first sensory data is generated in the first length of fiber optic sensory cable and second sensory data is generated in the second length of fiber optic sensory cable and conveyed to the DFOS interrogator system via the communications fiber optic cable, wherein the first type of sensory data and the second type of sensory data is a type selected from the group consisting of acoustic data, temperature data, and vibration data and the first type of sensory data is not the same type as the second type of sensory data.