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1.发明申请公开(公告)号：US20220262240A1
公开(公告)日：2022-08-18
申请号：US17622958
申请日：2019-07-01
Applicant: NEC Corporation
Inventor： Chaitanya Prasad NARISETTY , Akihiro TANAKA , Tomoyuki HINO
Abstract: The present disclosure provides a traffic prediction apparatus, system, method and program capable of predicting the number of vehicles and the speed of vehicles in a predetermined time and in a predetermined range based on waterfall data of vehicles. The traffic prediction apparatus comprises acquisition means for acquiring waterfall data comprising a generation position of a vibration, a generation time of the vibration and an amplitude of the vibration generated by a vehicle traveling on a road, pre-processing means for transforming the acquired waterfall data, generation means for training a portion of the plurality of processed waterfall data and at least one corresponding ground truth traffic property used as plurality of labels to generate a trained model, wherein the ground truth may be obtained from a secondary acquisition means, and prediction means for predicting at least one traffic property for a processed waterfall data.
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公开(公告)号：US20220170766A1
公开(公告)日：2022-06-02
申请号：US17602358
申请日：2019-04-16
Applicant: NEC Corporation
Inventor： Tomoyuki HINO , Akihiro TANAKA , Chaitanya Prasad NARISETTY
Abstract: According to one example embodiment, an optical fiber sensor includes an optical fiber cable and a device body configured to cause an optical pulse signal to be incident on the optical fiber cable and identify, from intensity change of backscattered light of the incident optical pulse signal and an arrival time of the backscattered light, a prescribed environmental change having occurred in a vicinity of the optical fiber cable and an occurrence location of the environmental change, in which the device body performs correction of a sensing location on the optical fiber cable, based on environmental change information including the identified occurrence location and installation location information of the optical fiber cable.
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公开(公告)号：US20210383666A1
公开(公告)日：2021-12-09
申请号：US17290455
申请日：2018-11-12
Applicant: NEC Corporation
Inventor： Akihiro TANAKA
IPC: G08B17/103 , G08B17/06
Abstract: A fire detection system includes a transmitter including a light source that sends an optical signal and a receiver including a detector that detects the optical signal sent from the light source through a predetermined light propagation section, a signal processing unit that calculates at least one of a first gas concentration, a first smoke concentration, and a first temperature in the light propagation section based on the optical signal, a sensor that acquires at least one of a second gas concentration, a second smoke concentration, and a second temperature in the surroundings, and a determiner that determines whether there is a fire by comparing at least one of the first gas concentration, the first smoke concentration, and the first temperature with at least one of the second gas concentration, the second smoke concentration, and the second temperature in the surroundings.
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公开(公告)号：US20230204886A1
公开(公告)日：2023-06-29
申请号：US17912234
申请日：2021-02-03
Applicant: NEC Corporation , NEC Platforms, Ltd.
Inventor： Toshihide NAGASAWA , Akihiro TANAKA
CPC classification number: G02B6/4495 , G02B6/506 , G02B6/3878
Abstract: In an aspect of the present disclosure, a submarine device includes a main tail cable connected to a submarine cable, a first branch tail cable including a first group of optical fibers among a plurality of optical fibers included in the main tail cable, a second branch tail cable including a second group of optical fibers among the plurality of optical fibers, a branch member that couples the main tail cable to the first and second branch tail cables and including therein a through hole for branching the plurality of optical fibers included in the main tail cable into the first group and the second group, and a device main body including a first introduction part for introducing the first branch tail cable into the device main body and a second introduction part for introducing the second branch tail cable into the device main body.
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公开(公告)号：US20180356338A1
公开(公告)日：2018-12-13
申请号：US15778447
申请日：2016-11-18
Applicant: NEC CORPORATION
Inventor： Akihiro TANAKA
IPC: G01N21/3504
CPC classification number: G01N21/3504 , G01N21/39 , G01N2201/061 , G01N2201/063 , G01N2201/0833
Abstract: In order to perform gas detection at multiple locations with a simple configuration and at a low cost, the gas detection device is provided with: a transmission unit for outputting to a transmission path, as a first optical signal, pulse light that has a temporally changing wavelength and that is generated by pulse light modulated by an optical wavelength modulator; and a reception unit for receiving a second optical signal output from a sensor head outputting the first optical signal propagated through the atmosphere as the second optical signal, converting the second optical signal received into an electric the signal detecting, by each sensor head, a predetermined type of gas contained in the atmosphere based on a temporal change in amplitude of the electric signal, and outputting a result of detection of the gas.
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Patent Agency Ranking
公开(公告)号：US20220099570A1
公开(公告)日：2022-03-31
申请号：US17426242
申请日：2019-01-31
Applicant: NEC Corporation
Inventor： Yuma MATSUDA , Akihiro TANAKA
IPC: G01N21/39
Abstract: A detection unit receives an optical signal that has passed through a space to be measured. A spectrum extraction unit extracts a range to be measured from the optical signal received by the detection unit. The spectrum extraction unit extracts an optical signal formed as a gas molecule of a gas to be measured absorbs energy of the optical signal. A determination unit determines the presence of an anomaly in the space to be measured based on a waveform of the optical signal extracted by the spectrum extraction unit.
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公开(公告)号：US20210241615A1
公开(公告)日：2021-08-05
申请号：US16777803
申请日：2020-01-30
Applicant: NEC Corporation
Inventor： Chaitanya Prasad NARISETTY , Tomoyuki HINO , Akihiro TANAKA
Abstract: A traffic monitoring apparatus includes a distributed acoustic sensor (DAS) for acquiring waterfall data, wherein the waterfall data includes a generation position of a vibration on a roadway adjacent to the DAS, a generation time of the vibration and an amplitude of the vibration. The traffic monitoring apparatus further includes a processor connected to the DAS. The processor is configured to receive the waterfall data from the DAS. The processor is further configured to preprocess the waterfall data. The processor is further configured to separate the preprocessed waterfall data into a plurality of patches, wherein a size of each patch of the plurality of patches is determined based on a parameter of the roadway. The processor is further configured to process each of the plurality of patches to estimate at least one traffic flow property of the roadway.
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公开(公告)号：US20210215604A1
公开(公告)日：2021-07-15
申请号：US17263288
申请日：2019-06-06
Applicant: NEC Corporation
Inventor： Yuma MATSUDA , Akihiro TANAKA
IPC: G01N21/53 , G01N33/00 , G08B17/103
Abstract: A receiver (10) according to the present disclosure includes: a detection unit (11) including a sensor configured to receive a first optical signal of a wavelength included in an absorption band of water molecules and a second optical signal of a wavelength included in an absorption band of carbon dioxide molecules, a signal processing unit (12) configured to calculate a water vapor concentration and a carbon dioxide concentration from changes of intensities of the first and second optical signals, and a determination unit (13) configured to determine whether or not there is a fire that is caused by alcohol combustion based on the water vapor concentration and the carbon dioxide concentration.
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公开(公告)号：US20220155224A1
公开(公告)日：2022-05-19
申请号：US17440382
申请日：2020-01-27
Applicant: NEC Corporation
Inventor： Yuma MATSUDA , Akihiro TANAKA
Abstract: A receiver comprises: optical signal distributing means for distributing an optical signal transmitted to detect a detection target on a traveling path to two or more paths; a detection unit configured to detect a received light intensity of the optical signal at a first position where the received light intensity increases when the optical axis is shifted and at a second position where the received light intensity decreases; an intensity ratio calculation unit configured to calculate a ratio between the received light intensity at the first position and the second position based on the output of the detection unit; and a determination unit configured to determine whether or not there is an optical axis shift based on a change in the ratio of the received light intensity calculated by the intensity ratio calculation unit.
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公开(公告)号：US20210010836A1
公开(公告)日：2021-01-14
申请号：US17041612
申请日：2019-03-26
Applicant: NEC Corporation
Inventor： Tomoyuki HINO , Akihiro TANAKA
IPC: G01D5/353
Abstract: An optical fiber sensor irradiates light pulses into an optical fiber cable and analyses backscattered light thereof. The optical fiber sensor comprises: a determination part that determines a timing at which measurement of an environmental change starts and a timing at which measurement of the environmental change ends, based on the backscattered light; and an occurrence region estimation part that estimates an occurrence region of the environmental change in a longitudinal direction of the optical fiber cable, based on the timing at which measurement of the environmental change starts; the timing at which measurement of the environmental change ends; and a pulse width of the light pulses.
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