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51.发明公开公开(公告)号：US20230228617A1
公开(公告)日：2023-07-20
申请号：US18126409
申请日：2023-03-25
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang HU , Ting WANG
Abstract: Distributed fiber optic sensing systems (DFOS) methods, and structures that employ DVS / DAS point sensors and a two-stage processing methodology / structure that advantageously enable point sensors to send sensor data at any time - thereby providing significant processing advantages over the prior art.
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公开(公告)号：US20230152151A1
公开(公告)日：2023-05-18
申请号：US17987822
申请日：2022-11-15
Applicant: NEC Laboratories America, Inc.
Inventor： Yaowen LI , Jian FANG , Shuj MURAKAMI , Philip JI , Ting WANG
CPC classification number: G01H9/004 , G01D5/35361
Abstract: Systems, methods, and structures for colorless distributed fiber optic sensing/distributed vibration sensing (DOFS/DVS) over dense wavelength division multiplexing (DWDM) telecommunications facilities that operate over a C-band wavelength range spanning from 1525 nm to 1565 nm wherein the DOFS/DVS systems exhibit suitable reconfigurability of its wavelength to match a wavelength of a desired testing channel and may advantageously provide DOFS/DVS capabilities to existing DWDM communications infrastructure as a retrofit. Colorless DFOS/DVS systems according to the present disclosure include a length of optical sensor fiber; a colorless DFOS/DVS interrogator in optical communication with the optical sensor fiber, said colorless DFOS/DVS interrogator configured to generate optical pulses, introduce the generated pulses into the length of optical sensor fiber, and receive backscattered signals from the length of the optical sensor fiber; and an intelligent analyzer configured to analyze colorless DFOS/DVS data received by the DFOS/DVS interrogator and determine from the backscattered signals, vibrational activity occurring at locations along the length of the optical sensor fiber.
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公开(公告)号：US20230142932A1
公开(公告)日：2023-05-11
申请号：US17979755
申请日：2022-11-02
Applicant: NEC Laboratories America, Inc.
Inventor： Shaobo HAN , Ming-Fang HUANG , Yuheng CHEN , Ting WANG , Sheng ZHONG
CPC classification number: G01D5/35358 , G01H9/004
Abstract: A method for underground cable localization by fast time series template matching and distributed fiber optic sensing (DFOS) includes: providing the DFOS system including a length of optical sensor fiber; a DFOS interrogator in optical communication with the optical sensor fiber, said DFOS interrogator configured to generate optical pulses, introduce the generated pulses into the length of optical sensor fiber, and receive backscattered signals from 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, vibrational activity occurring at locations along the length of the optical sensor fiber; deploying a programmable vibration generator to a field location proximate to the length of optical sensor fiber; transmitting to the programmable vibration generator a unique vibration pattern to be generated by the vibration generator; and operating the programmable vibration generator to generate the unique vibration pattern transmitted; and operating the DFOS system and collecting/analyzing the determined vibrational activity to further determine vibrational activity indicative of the unique vibration pattern generated by the vibration generator.
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54.发明申请公开(公告)号：US20230024470A1
公开(公告)日：2023-01-26
申请号：US17871888
申请日：2022-07-22
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG
Abstract: Systems, and methods for automatically identifying individual fibers within an optical fiber cable that are experiencing some form of significant signal impairment such as a fiber cut. Operationally, distributed fiber optic sensing (DFOS) systems are used to detect reflected signals along the length of the affected fiber(s) and a determination of affected fiber(s) is made from changes in reflection characteristics.
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公开(公告)号：US20230024104A1
公开(公告)日：2023-01-26
申请号：US17871862
申请日：2022-07-22
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin DING , Sarper OZHARAR , Yue TIAN , Ting WANG
Abstract: Systems, and methods for automatically determining false transformer humming when using DFOS systems and methods to determine such humming along with machine learning approach(es) to identify the false transformer humming signal(s) that are transferred to a utility pole without a transformer from a working transformer on another utility pole. Advantageously, our inventive systems and methods employ a customized signal processing workflow to process raw data collected from the DFOS. Our employs a binary classifier that can automatically identify a transformer humming signal from a utility pole with a transformer and simultaneously identify the false humming signal from a utility pole without a transformer.
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Patent Agency Ranking
公开(公告)号：US20220247562A1
公开(公告)日：2022-08-04
申请号：US17589863
申请日：2022-01-31
Applicant: NEC Laboratories America, Inc.
Inventor： Qiang WANG , Junqiang HU , Jian FANG , Yaowen LI , Ting WANG
Abstract: Physimetric-based data security for coded distributed temperature sensing (DTS) in which physimetric information is extracted from a coded-DTS interrogator which is unique for each interrogator at each operating run time—and used to reconstruct a final temperature determination from DTS data. The physimetric information includes coded-DTS pulse code and coded-DTS pulse profile information as a key to permit secure sharing with authorized users. The pulse code and pulse profile information are encrypted and made available to an authorized user. The authorized user can then decrypt the pulse code and pulse profile information and subsequently use this key information (pulse profile and pulse code files) to retrieve temperature information from for example, a remote computer providing a continuous raw data feed—without being susceptible to eavesdropping. The pulse profile and pulse code files permit reconstruction of temperature from DTS continuous raw data feed which have no meaningful informational value to an eavesdropper who has no access to the unencrypted pulse profile and pulse code information.
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公开(公告)号：US20220065977A1
公开(公告)日：2022-03-03
申请号：US17409792
申请日：2021-08-24
Applicant: NEC Laboratories America, Inc.
Inventor： Sarper OZHARAR , Yue TIAN , Shaobo HAN , Ting WANG , Yangmin DING
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable city-scale acoustic impulse detection and localization using standard, live aerial telecommunications optical fiber cables through the use of distributed acoustic sensing exhibiting an error of less than 1.22 m.
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公开(公告)号：US20210311088A1
公开(公告)日：2021-10-07
申请号：US17221805
申请日：2021-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG
IPC: G01P5/00
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously measure wind speed at utility poles that support fiber optic cables and—in many applications—electrical and/or other communications cables (i.e., cable television).
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公开(公告)号：US20210266065A1
公开(公告)日：2021-08-26
申请号：US17035551
申请日：2020-09-28
Applicant: NEC Laboratories America, Inc.
Inventor： Ting WANG , Ming-Fang HUANG , Yaowen LI , Philip JI
IPC: H04B10/079 , G01D5/353
Abstract: Aspects of the present disclosure describe optical fiber sensing systems, methods and structures disclosing a distributed optical fiber sensor network constructed on a switched optical fiber telecommunications infrastructure to detect temperatures, acoustic effects, and vehicle traffic—among others—demonstrated with a number of different network topologies.
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公开(公告)号：US20200319018A1
公开(公告)日：2020-10-08
申请号：US16839686
申请日：2020-04-03
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang HUANG , Ting WANG
Abstract: Aspects of the present disclosure describe distributed optical fiber sensing for smart city applications in which distributed optical fiber sensing is integrated with a surveillance system into a single system such that the distributed sensing system may detect an event of interest and the surveillance system including cameras may be reoriented in response to verify and/or examine and/or acquire video of the event. Of particular advantage such distributed fiber sensing may include distributed acoustic sensing (DAS) for vibrational sensing and distributed temperature sensing (DTS) for temperature sensing. The integrated system employs shared optical fiber transport for the distributed sensing and the surveillance.
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