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公开(公告)号：WO2023091447A1
公开(公告)日：2023-05-25
申请号：PCT/US2022/050044
申请日：2022-11-16
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： CHEN, Yuheng , HUANG, Ming-Fang , WANG, Ting , ZHAO, Jingnan
Abstract: A fiber optic sensing cable located along a side of a paved road and runs parallel to a driving direction is monitored by distributed fiber optic sensing (DFOS) using Rayleigh backscattering generated along the length of the optical sensor fiber cable under dynamic vehicle loads. The interaction of vehicles with roadway locations exhibiting distressed pavement generates unique patterns of localized signals that are identified/distinguished from signals resulting from vehicles operating on roadway exhibiting a smooth pavement surface. Machine learning methods are employed to estimate an overall road surface quality as well as localizing pavement damage. Power spectral density estimation, principal component analysis, support vector machine (SVM) combined with principal component analysis (PCA), local binary pattern (LBP), and convolutional neural network (CNN) are applied to develop the machine learning models.
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公开(公告)号：WO2021243029A1
公开(公告)日：2021-12-02
申请号：PCT/US2021/034528
申请日：2021-05-27
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： CHANDRAKER, Manmohan , WANG, Ting , XU, Xiang , PITTALUGA, Francesco , SHARMA, Gaurav , TSAI, Yi-Hsuan , FARAKI, Masoud , CHEN, Yuheng , TIAN, Yue , HUANG, Ming-Fang , FANG, Jian
Abstract: Methods and systems for training a neural network include generating (801) an image of a mask. A copy of an image is generated (302) from an original set of training data. The copy is altered (302) to add the image of a mask to a face detected within the copy. An augmented set of training data is generated (302) that includes the original set of training data and the altered copy. A neural network model is trained (304) to recognize masked faces using the augmented set of training data.
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3.发明申请
公开(公告)号：WO2021207255A1
公开(公告)日：2021-10-14
申请号：PCT/US2021/026029
申请日：2021-04-06
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： CHEN, Yueheng , HUANG, Ming-Fang , WANG, Ting , ZHAO, Jingnan
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 monitor and identify - in real-time - roadway traffic and patterns across a multiple-lane highway by employing a multiple-transverse fiber optic cable arrangement of optical fiber cable positioned under the highway / roadway to detect, monitor, and/or identify traffic.
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公开(公告)号：WO2021207093A1
公开(公告)日：2021-10-14
申请号：PCT/US2021/025810
申请日：2021-04-05
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HUANG, Ming-Fang , WANG, Ting
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：WO2023091450A1
公开(公告)日：2023-05-25
申请号：PCT/US2022/050049
申请日：2022-11-16
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HUANG, Ming-Fang , JI, Philip , HAN, Shaobo , WANG, Ting
Abstract: Systems, methods, and structures for efficiently identifying individual fibers located in a deployed cable that advantageously reduces laborious field efforts while reducing service outage time. The systems and methods locate a targeted fiber in a cable ("Cable ID") and then identify the targeted fiber ("Fiber ID") by detecting DFOS signal attentions – without cutting the optical fiber. Two distinct determinations may be made namely, Cable ID and Fiber ID. DFOS operation detects vibration signals occurring along a sensor fiber. As implemented, Cable ID is an interactive-machine learning-based algorithm that automatically locates cable position along a sensor fiber route. Fiber ID detects a signal attenuation by bending a group of fibers with bifurcation to pinpoint a targeted individual fiber within a fiber cable.
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Patent Agency Ranking
公开(公告)号：WO2023081249A1
公开(公告)日：2023-05-11
申请号：PCT/US2022/048763
申请日：2022-11-03
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HAN, Shaobo , HUANG, Ming-Fang , CHEN, Yuheng , WANG, Ting , ZHONG, Sheng
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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公开(公告)号：WO2021207097A1
公开(公告)日：2021-10-14
申请号：PCT/US2021/025817
申请日：2021-04-05
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HUANG, Ming-Fang , WANG, Ting
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously utilize existing telecommunications facilities that serve as not only to convey telecommunications traffic - but as a sensor medium providing useful sensory information. In sharp contrast to the prior art - a DFOS system when so deployed may advantageously exploit network topologies and optical switches to provide novel sensing features including the detection of environmental events including acoustic, temperature, and vibrational events that may be indicative of societal activity including traffic and/or emergency events.
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8.发明申请
公开(公告)号：WO2021207006A1
公开(公告)日：2021-10-14
申请号：PCT/US2021/025475
申请日：2021-04-01
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HUANG, Ming-Fang , WANG, Ting , LIU, Hansi
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing systems, methods, and structures that advantageously are employed to determine the location and depth of underground fiber-optic facilities that may be carrying telecommunications traffic
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公开(公告)号：WO2020006414A1
公开(公告)日：2020-01-02
申请号：PCT/US2019/039838
申请日：2019-06-28
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： HUANG, Ming-Fang , WANG, Ting
Abstract: Aspects of the present disclosure describe systems, methods and structures employing optical fiber sensing to monitor highway/roadway/street conditions (i.e., potholes, pavement cracks, etc.) in real-time, continuously, and while the highway/roadway/street remains in operation (in-service monitoring). Systems, methods, and structures according to aspects of the present disclosure may employ machine learning (ML) algorithms including neural networks to provide and or report on highway conditions so monitored/sensed. Of further advantage, systems, methods, and structures for optical fiber sensing for highway maintenance may operate in real-time, continuously, long-term, in-service, and may employ existing telecommunications optical cables without additional deployment cost(s) or disruption of telecommunications traffic.
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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
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.
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