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公开(公告)号：US10775245B2
公开(公告)日：2020-09-15
申请号：US15789381
申请日：2017-10-20
Applicant: FUJITSU LIMITED
Inventor： Kazushi Uno , Takeo Kasajima , Takahiro Arioka , Hiroyuki Fukuda
IPC: G01K11/32
Abstract: A temperature measurement device includes: a light source configured to input a light into an optical fiber; a detector configured to detect a Stokes component and an anti-Stokes component from a back scattering light from the optical fiber; a memory; and a processor configured to execute a process, the process comprising: in a predetermined region including a sample point of the optical fiber, calculating a range including the sample point in accordance with a largeness of a correlation between the Stokes component and the anti-Stokes component; smoothing the Stokes component and the anti-Stokes component in the range; and measuring a temperature of the sample point with use of the Stokes component and the anti-Stokes component that are smoothed by the corrector.
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公开(公告)号：US10712211B2
公开(公告)日：2020-07-14
申请号：US15801828
申请日：2017-11-02
Applicant: FUJITSU LIMITED
Inventor： Kazushi Uno , Takeo Kasajima , Takahiro Arioka , Hiroyuki Fukuda
IPC: G01K11/32
Abstract: A temperature measurement device includes: a detector to detect first Stokes and anti-Stokes components when a light is input into a first end of an optical fiber and detect second Stokes and anti-Stokes components when a light is input into a second end; and a processor to execute a process including: calculating a first section from a first correlation between the second Stokes component and at least one of the first Stokes and the first anti-Stokes components, calculating a second section from a second correlation between the second anti-Stokes component and at least one of the first Stokes and the first anti-Stokes components, smoothing the second Stokes component in the first section, smoothing the second anti-Stokes component in the second section; and measuring a temperature by using the second Stokes and the second anti-Stokes components after smoothing, the first Stokes component and the second Stokes component.
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公开(公告)号：US09915620B2
公开(公告)日：2018-03-13
申请号：US14693246
申请日：2015-04-22
Applicant: FUJITSU LIMITED
Inventor： Kazushi Uno , Fumio Takei , Takeo Kasajima , Kyoko Tadaki , Minoru Ishinabe
CPC classification number: G01N21/95 , G01B11/16 , G01D5/35364 , G01K11/32 , G01L1/24 , G01N21/47 , G01N25/72 , G01N2201/08 , G01N2201/12
Abstract: An abnormality detection system includes an optical fiber, a Raman scattered light detection unit, and a data processing unit. The detection unit is configured to detect Stokes light and anti-Stokes light which are generated in the optical fiber and to output data on the intensity distribution of the Stokes light in the optical fiber in the length direction thereof and data on the intensity distribution of the anti-Stokes light in the optical fiber in the length direction. The processing unit is configured to calculate the product of a value obtained by applying an FIR filter to the intensity distribution of the Stokes light, and a value obtained by applying the FIR filter to the intensity distribution of the anti-Stokes light for each of locations on the optical fiber in the length direction, and to determine whether or not abnormality is present based on the result of the calculation.
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公开(公告)号：US09528860B2
公开(公告)日：2016-12-27
申请号：US15149508
申请日：2016-05-09
Applicant: FUJITSU LIMITED
Inventor： Kazushi Uno , Fumio Takei , Takeo Kasajima , Kyoko Tadaki , Minoru Ishinabe
CPC classification number: G01D5/35358 , G01D5/353 , G01K11/32 , G01L1/24 , G01N21/47
Abstract: An abnormality detection system includes an optical fiber, a backscattered light detection unit, and a data processing unit. The detection unit is connected to one end and the other end of the optical fiber and configured to acquire a first intensity distribution of backscattered light by causing light to enter the optical fiber from the one end, and to acquire a second intensity distribution of backscattered light by causing light to enter the optical fiber from the other end. The processing unit is configured to calculate the product of a value obtained by applying a first FIR filter to the first intensity distribution, and a value obtained by applying a second FIR filter to the second intensity distribution, for each of locations on the optical fiber in the length direction thereof, and to determine whether or not abnormality is present based on the result of the calculation.
Abstract translation: 异常检测系统包括光纤，背散射光检测单元和数据处理单元。 检测单元连接到光纤的一端和另一端，并且被配置为通过使光从一端进入光纤获得反向散射光的第一强度分布，并获得反向散射光的第二强度分布 通过使光从另一端进入光纤。 处理单元被配置为计算通过将第一FIR滤波器应用于第一强度分布而获得的值的乘积，以及通过对光纤中的每个位置对第二强度分布应用第二FIR滤波器而获得的值 其长度方向，并且基于计算结果来确定是否存在异常。
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公开(公告)号：US10267689B2
公开(公告)日：2019-04-23
申请号：US14989000
申请日：2016-01-06
Applicant: FUJITSU LIMITED
Inventor： Takahiro Arioka , Kazushi Uno , Takeo Kasajima , Fumio Takei , Hiroyuki Fukuda
IPC: G01K11/32
Abstract: A temperature measuring system includes a laser light source that emits optical pulses, an optical fiber, arranged to pass through a plurality of temperature measuring points, and input with the optical pulses, and a measuring device that detects back-scattering light output from the optical fiber and measures a temperature at the plurality of measuring points, to acquire measured temperature data. The measuring device computes corrected temperature data by varying a degree of averaging of the measured temperature data in a time direction, according to whether a time-sequential difference temperature data have a spatial correlation or a time correlation within a range that uses a target position of the optical fiber as a reference.
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Patent Agency Ranking
6.发明授权公开(公告)号：US09797782B2
公开(公告)日：2017-10-24
申请号：US14171880
申请日：2014-02-04
Applicant: FUJITSU LIMITED
Inventor： Takeo Kasajima , Kazushi Uno , Minoru Ishinabe , Kyoko Tadaki , Fumio Takei
CPC classification number: G01K11/32 , G01K2011/324
Abstract: A temperature distribution measurement apparatus includes a laser light source optically connected to an optical fiber, a photodetector configured to detect light backscattered in the optical fiber, and a temperature distribution measurement unit configured to obtain a true measured temperature distribution by performing correction calculation using a transfer function on a temporary measured temperature distribution obtained based on an output from the photodetector. The temperature distribution measurement unit stores therein data on a transfer function set for each entire length of the optical fiber and for each longitudinal position in the optical fiber. Then, when the length of the optical fiber is changed, the temperature distribution measurement unit changes the transfer function to be used in the correction calculation by using the data on the transfer function.
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7.发明申请TEMPERATURE DISTRIBUTION PREDICTION METHOD AND AIR CONDITIONING MANAGEMENT SYSTEM 审中-公开温度分布预测方法和空调管理系统公开(公告)号：US20160061668A1
公开(公告)日：2016-03-03
申请号：US14819738
申请日：2015-08-06
Applicant: FUJITSU LIMITED
Inventor： Takeo Kasajima , Masatoshi OGAWA , Minoru Ishinabe , Kazushi Uno , Hiroyuki FUKUDA , Masao KONDO , Takeshi Hatanaka , Masayuki Fujita
CPC classification number: G01K13/02 , G01K7/42 , G01K2013/024 , H05K7/20745 , H05K7/20836
Abstract: A temperature distribution prediction method of predicting a predetermined temperature distribution in an air conditioning system, the air conditioning system including an air conditioner for supplying temperature-adjusted air into a room where racks in which electronic apparatuses are accommodated are installed; and air blowers for transferring the air supplied from the air conditioner to an intake side of the racks, the method includes: measuring the temperature distribution for actual conditions varying the operating situations of the air blowers; and predicting the temperature distribution for conditions of non-measurement for the air blowers based on the measured values.
Abstract translation: 一种温度分布预测方法，用于预测空调系统中的预定温度分布，所述空调系统包括：空气调节器，用于将温度调节的空气供应到容纳电子设备的机架的房间; 以及用于将从空调供给的空气传送到机架的进气侧的鼓风机，所述方法包括：测量改变鼓风机的运行情况的实际条件的温度分布; 并基于测量值预测鼓风机的非测量条件的温度分布。
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公开(公告)号：US10422751B2
公开(公告)日：2019-09-24
申请号：US15050891
申请日：2016-02-23
Applicant: FUJITSU LIMITED
Inventor： Kazushi Uno , Fumio Takei , Takeo Kasajima
Abstract: An optical fiber cord includes: an optical fiber; and a cover material covering the optical fiber, the cover material being formed by braiding a plurality of yarns. Moreover, an abnormality detection system includes: the optical fiber covered with the cover material formed by braiding the plurality of yarns; a scattered light detector configured to detect scattered light occurring in the optical fiber and output data on intensity distribution in a longitudinal direction of the optical fiber; and a data processor configured to determine the presence or absence of an abnormality based on the data outputted from the scattered light detector.
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公开(公告)号：US10281340B2
公开(公告)日：2019-05-07
申请号：US14992343
申请日：2016-01-11
Applicant: FUJITSU LIMITED
Inventor： Takahiro Arioka , Kazushi Uno , Takeo Kasajima , Fumio Takei , Hiroyuki Fukuda
IPC: G01K11/32
Abstract: A temperature measuring system includes a laser light source to emit optical pulses, an optical fiber, arranged to pass through a plurality of measuring points, and input with the optical pulses, and a measuring device to detect back-scattering light output from the optical fiber and measure a temperature at the plurality of measuring points, to acquire measured temperature data. The measuring device computes corrected temperature data by varying a degree of smoothing the measured temperature data in a distance direction of the optical fiber, according to a correlation between the measured temperature data and a transfer function peculiar to the temperature measuring system.
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10.发明申请公开(公告)号：US20180058948A1
公开(公告)日：2018-03-01
申请号：US15789408
申请日：2017-10-20
Applicant: FUJITSU LIMITED
Inventor： Kazushi Uno , Takeo Kasajima , Takahiro Arioka , Hiroyuki Fukuda
IPC: G01K11/32
Abstract: A temperature measurement device includes: a detector to detect a first Stokes component and a first anti-Stokes component when a light is input into a first end of an optical fiber and detect a second Stokes component and a second anti-Stokes component when a light is input into a second end; and a processor configured to execute a process comprising: replacing the second anti-Stokes component with a value according to the first Stokes component, the first anti-Stokes component and the second Stokes component when any one of correlations of the second anti-Stokes component to the first Stokes component and the first anti-Stokes component is less than or equal to a threshold value; and measuring a temperature at the sample point by using the first Stokes component, the first anti-Stokes component, the second Stokes component, and the second anti-Stokes component that is replaced in the replacing.
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