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公开(公告)号：US20150292944A1
公开(公告)日：2015-10-15
申请号：US14682363
申请日：2015-04-09
Applicant: NEC Laboratories America, Inc.
CPC classification number: G01J3/0297 , G01J3/0205 , G01J3/26 , G01J3/28 , G01J3/45
Abstract: An optical phase scrambler is coupled to a laser source to randomly modulate the optical phase. Since the optical phase is continuously changing in a random fashion, at the output of an etalon interferometer formed in the optical path, the two or more components in the interference always have certain time delay between each other, resulting in a random phase different between each other. Therefore, after interference, the fringe amplitude varies randomly as well. Then at the receiver side, the fringe noise is greatly reduced after averaging over time.
Abstract translation: 光学相位扰频器耦合到激光源以随机调制光学相位。 由于光学相位以随机方式连续变化，在形成于光路中的标准具干涉仪的输出处，干涉中的两个或更多个成分之间总是具有一定的时间延迟，导致每个 其他。 因此，干扰后，条纹幅度也随机变化。 然后在接收机侧，随着时间的推移，边缘噪声大大降低。
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12.发明授权Optical phase conjugation aided long-haul transmission system with enhanced signal-to-noise ratio and nonlinear tolerance 有权光相位共轭辅助长距离传输系统具有增强的信噪比和非线性公差公开(公告)号：US09088365B2
公开(公告)日：2015-07-21
申请号：US14044530
申请日：2013-10-02
Applicant: NEC Laboratories America, Inc.
Inventor： Yue Tian , Yue-Kai Huang , Shaoliang Zhang
IPC: H04B10/00 , H04B10/2507 , H04B10/2543 , H04B10/50 , H04B10/61
CPC classification number: H04B10/2507 , H04B10/2543 , H04B10/50 , H04B10/61
Abstract: A long haul transmission system uses a digital signal processor DSP instead of an additional optical phase conjugate copier because the optical phase conjugate copier requires high quality optical carrier regeneration to recover the pump and optical PLL to maintain phase matching between signal and pump. Therefore, the use of DSP to process the signal and idler at receiver end greatly simplifies the system setup, increases the system stability and decreases the system cost.
Abstract translation: 长距离传输系统使用数字信号处理器DSP而不是附加的光学相位共轭复印机，因为光学相位共轭复印机需要高质量的光载波再生以恢复泵浦和光学PLL以维持信号和泵之间的相位匹配。 因此，在接收端使用DSP处理信号和空闲信号大大简化了系统设置，提高了系统稳定性，降低了系统成本。
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公开(公告)号：US12072233B2
公开(公告)日：2024-08-27
申请号：US17716403
申请日：2022-04-08
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Yue Tian , Sarper Ozharar , Yuanda Xu , Ting Wang
Abstract: Systems and methods for reducing work conflicts is provided. The method includes receiving a vibrational signal from a utility pole; identifying a location and type of field work on the utility pole from one or more features of the vibrational signal utilizing a trained neural network; and communicating the location and type of field work to a third party.
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公开(公告)号：US20240055842A1
公开(公告)日：2024-02-15
申请号：US18492902
申请日：2023-10-24
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Yuanda Xu , Sarper Ozharar , Yue Tian , Ting Wang
CPC classification number: H02G1/02 , G01S19/01 , G01D5/35354
Abstract: Systems and methods for performing the dynamic anomaly localization of utility pole aerial/suspended/supported wires/cables by distributed fiber optic sensing. In sharp contrast to the prior art, our inventive systems and methods according to aspects of the present disclosure advantageously identify a “location region” on a utility pole supporting an affected wire/cable, thereby permitting the identification and reporting of service personnel that are uniquely responsible for responding to such anomalous condition(s).
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公开(公告)号：US11846569B2
公开(公告)日：2023-12-19
申请号：US17715002
申请日：2022-04-06
Applicant: NEC Laboratories America, Inc.
Inventor： Yue Tian , Sarper Ozharar , Yangmin Ding , Shaobo Han , Ting Wang
CPC classification number: G01M7/08 , G01D5/35361 , G01H9/004
Abstract: A method of utility pole integrity assessment by distributed fiber optic sensing/distributed acoustic sensing (DFOS/DAS) employing existing telecommunications fiber optic cable as a sensor. The fiber optic cable is suspended aerially from a plurality of utility poles and a machine learning model is developed during training by mechanically exciting the utility poles. Once developed, and in sharp contrast to the prior art, the machine learning model—in conjunction with DFOS/DAS operation—determines an integrity assessment for a plurality of the utility poles aerially suspending the fiber optic cable from a mechanical impact of a single pole.
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Patent Agency Ranking
公开(公告)号：US11680849B2
公开(公告)日：2023-06-20
申请号：US17227313
申请日：2021-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Yue Tian , Sarper Ozharar , Ting Wang
CPC classification number: G01H9/004 , G08B21/182 , G06N20/00
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable and/or facilitate the continuous monitoring and identification of damaged utility poles by employing a DFOS distributed acoustic sensing (DAS) methodology in conjunction with a finite element analysis and operational modal analysis. Of particular advantage and in further contrast to the prior art, systems, methods, and structures according to aspects of the present disclosure utilize existing optical fiber supported/suspended by the utility poles as a sensing medium for the DFOS/DAS operation.
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公开(公告)号：US20220326070A1
公开(公告)日：2022-10-13
申请号：US17716403
申请日：2022-04-08
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin Ding , Yue Tian , Sarper Ozharar , Yuanda Xu , Ting Wang
Abstract: Systems and methods for reducing work conflicts is provided. The method includes receiving a vibrational signal from a utility pole; identifying a location and type of field work on the utility pole from one or more features of the vibrational signal utilizing a trained neural network; and communicating the location and type of field work to a third party.
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18.发明申请公开(公告)号：US20220236105A1
公开(公告)日：2022-07-28
申请号：US17583168
申请日：2022-01-24
Applicant: NEC Laboratories America, Inc.
Inventor： Sarper Ozharar , Yue Tian , Ting Wang , Yangmin Ding
Abstract: An advance in the art is made according to aspects of the present disclosure directed to the detection and localization of a substantially static weight situated on aerial telecommunications fiber optic cable through the effect of phase-distributed acoustic sensing (ϕ-DAS) and signal analysis of ambient data. In sharp contrast to the prior art, our inventive method does not require a special optical fiber arrangement or type of fiber nor is it susceptible to range limitations that plague the prior art.
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公开(公告)号：US10466106B2
公开(公告)日：2019-11-05
申请号：US16219136
申请日：2018-12-13
Applicant: NEC Laboratories America, Inc.
Inventor： Da Pan , Yue Tian , Ming-Fang Huang
Abstract: A computer-implemented method for measuring gas concentration from a 2f signal in wavelength modulation spectroscopy is presented. The computer-implemented method includes emitting a beam of light from a laser to pass through a gas sample, calculating a gas measurement value from the gas sample via a trough distance calculator using a trough distance of a gas absorption line's 2f signal, calibrating the gas measurement value via a multi-point calibration process, and outputting the gas measurement value to a user interface of a computing device.
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公开(公告)号：US20170115218A1
公开(公告)日：2017-04-27
申请号：US15269586
申请日：2016-09-19
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Lei Tao , Yue Tian , Ting Wang
CPC classification number: G01N21/59 , B60R11/04 , B64B1/40 , B64C39/024 , B64C2201/12 , G01N33/0062 , G01N2021/1795 , G01N2201/061 , G01N2201/06113 , G01N2201/0612 , G01N2201/062 , G01N2201/0636 , G01S3/786 , G01S7/4802 , G01S17/06 , G01S17/66 , G01S17/88 , G01S19/13
Abstract: Systems and methods for generating a three-dimensional gas map includes a remote vehicle including reflective material. A positioning stage including multidimensional movement to track the remote vehicle. A light head to reflect light off of the remote vehicle. A controller to analyze received light to determine gas content and generate a three-dimensional gas map.
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