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    SYSTEM AND METHOD FOR CONSTRUCTING FAULT-AUGMENTED SYSTEM MODEL FOR ROOT CAUSE ANALYSIS OF FAULTS IN MANUFACTURING SYSTEMS
    4.
    发明公开
    SYSTEM AND METHOD FOR CONSTRUCTING FAULT-AUGMENTED SYSTEM MODEL FOR ROOT CAUSE ANALYSIS OF FAULTS IN MANUFACTURING SYSTEMS 审中-公开

    公开(公告)号：EP3951533A1

    公开(公告)日：2022-02-09

    申请号：EP21182988.2

    申请日：2021-06-30

    申请人： Palo Alto Research Center Incorporated

    发明人： YU, Hong ,  RAGHAVAN, Ajay ,  MOSTAFAVI, Saman ,  JUNG, Deokwoo

    IPC分类号： G05B23/02

    摘要： A system is provided for determining causes of faults in a manufacturing system. The system stores data associated with a processing system which includes machines and associated processes, wherein the data includes timestamp information, machine status information, and product-batch information. The system determines, based on the data, a topology of the processing system, wherein the topology indicates flows of outputs between the machines as part of the processes. The system determines information of machine faults in association with the topology. The system generates, based on the machine-fault information, one or more fault parameters which indicates frequency and severity of a respective fault. The system constructs, based on the topology and the machine-fault information, a system model which includes the one or more fault parameters, thereby facilitating diagnosis of the processing system.

    FIBER OPTIC SENSING SYSTEM FOR GRID-BASED ASSETS
    5.
    发明公开
    FIBER OPTIC SENSING SYSTEM FOR GRID-BASED ASSETS 审中-公开

    公开(公告)号：EP3812711A3

    公开(公告)日：2021-08-11

    申请号：EP20201648.1

    申请日：2020-10-13

    申请人： Palo Alto Research Center Incorporated

    发明人： KIESEL, Peter ,  RAGHAVAN, Ajay ,  KARIN, Todd ,  CHEN, Qiushu

    IPC分类号： G01D5/353 ,  G01H9/00 ,  G01K11/3206 ,  G01M11/08 ,  G01R19/25 ,  G01R31/62 ,  H01F27/00

    摘要： A sensor system includes a sensor network comprising at least one optical fiber having one or more optical sensors. At least one of the optical sensors is arranged to sense vibration of an electrical device and to produce a time variation in light output in response to the vibration. A detector generates an electrical time domain signal in response to the time variation in light output. An analyzer acquires a snapshot frequency component signal which comprises one or more time varying signals of frequency components of the time domain signal over a data acquisition time period. The analyzer detects a condition of the electrical device based on the snapshot frequency component signal.

    OPTICAL MONITORING FOR POWER GRID SYSTEMS
    6.
    发明公开
    OPTICAL MONITORING FOR POWER GRID SYSTEMS 审中-公开

    公开(公告)号：EP3425361A1

    公开(公告)日：2019-01-09

    申请号：EP18180255.4

    申请日：2018-06-27

    申请人： Palo Alto Research Center Incorporated

    发明人： RAGHAVAN, Ajay ,  KIESEL, Peter

    IPC分类号： G01L1/24 ,  G01D5/353 ,  G02B6/12 ,  G02B6/293 ,  G01B11/16 ,  G01R31/02 ,  G01R31/06 ,  H04B3/46

    摘要： A monitoring system for a power grid includes one or more power transformer monitors. Each power transformer monitor includes a plurality of optical sensors disposed on one or more optical fibers that sense parameters of the power transformer. Each optical sensor is configured to sense a power transformer parameter that is different from a power transformer parameter sensed by at least one other sensor of the plurality of optical sensors. An optical coupler spatially disperses optical signals from the optical sensors according to wavelength. A detector unit converts optical signals of the optical sensors to electrical signals representative of the sensed power transformer parameters.

    SYSTEM FOR OPTICAL SENSING
    8.
    发明公开
    SYSTEM FOR OPTICAL SENSING 审中-公开

    公开(公告)号：EP4019907A1

    公开(公告)日：2022-06-29

    申请号：EP21215161.7

    申请日：2021-12-16

    申请人： Palo Alto Research Center Incorporated

    发明人： ARAKAKI, Kyle ,  KIESEL, Peter ,  RAGHAVAN, Ajay

    IPC分类号： G01D5/353 ,  G02B6/293

    摘要： A sensor system includes an optical fiber. A set of wavelength shift sensors are inscribed on the optical fiber. The set includes at least one first wavelength shift sensor configured to reflect a first wavelength band of input light as a first optical output signal. The first wavelength shift sensor has a first value of an optical characteristic that modifies intensity of the first optical output signal. At least one second wavelength shift sensor is configured to reflect a second wavelength band of input light as a second optical output signal. The second wavelength shift sensor has a second value of the optical characteristic that modifies intensity of the second optical output signal, wherein the second value is different from the first value.

    SYSTEM AND METHOD FOR DETERMINING MANUFACTURING PLANT TOPOLOGY AND FAULT PROPAGATION INFORMATION
    9.
    发明公开
    SYSTEM AND METHOD FOR DETERMINING MANUFACTURING PLANT TOPOLOGY AND FAULT PROPAGATION INFORMATION 审中-公开

    公开(公告)号：EP3945386A1

    公开(公告)日：2022-02-02

    申请号：EP21182999.9

    申请日：2021-06-30

    申请人： Palo Alto Research Center Incorporated

    发明人： YU, Hong ,  RAGHAVAN, Ajay ,  JUNG, Deokwoo ,  MOSTAFAVI, Saman

    IPC分类号： G05B23/02

    摘要： A system (+00) is provided for determining a manufacturing network topology and fault propagation information. During operation, the system stores data associated with a processing system which includes machines (104) and associated processes, wherein the data includes timestamp information, machine status information, and product-batch information. The system determines, based on the data, a network topology which corresponds to the processing system, wherein the network topology indicates flows of outputs between the machines as part of the processes. The system determines utilization information of a plurality of the machines of the processing system. The system displays one or more of the flows of outputs based on the utilization information, thereby facilitating diagnosis of the processing system.