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21.发明公开公开(公告)号：US20240056197A1
公开(公告)日：2024-02-15
申请号：US17766314
申请日：2020-10-05
Applicant: NEC Corporation
Inventor： Masaki SATO , Hidemi NOGUCHI , Junichi ABE
CPC classification number: H04B10/616 , H04B3/06
Abstract: An optical signal processing circuit (1) includes: an FDE-MIMO equalizer (2) configured to generate, based on continuous subcarrier signals including a target subcarrier signal in an optical multicarrier signal to be received, the continuous subcarrier signals that have been subjected to frequency-domain MIMO equalization processing; and a TDE-MIMO equalizer (3) configured to generate, based on the continuous subcarrier signals that have been subjected to the frequency-domain MIMO equalization processing, the target subcarrier signal that has been subjected to time-domain MIMO equalization processing.
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公开(公告)号：US20220326380A1
公开(公告)日：2022-10-13
申请号：US17639402
申请日：2019-09-04
Applicant: NEC Corporation
Inventor： Hidemi NOGUCHI
Abstract: An optical ranging device (10) according to the present disclosure includes a light pulse generation unit (11) that generates a light pulse with a phase change point between a first phase modulation portion and a second phase modulation portion, a light-transmitting unit (12) that transmits the generated light pulse, a light-receiving unit (13) that receives a light pulse reflected from a measurement object by the transmitted light pulse, and a distance calculation unit (14) that calculates a distance to the measurement object, based on a phase change point of the transmitted light pulse and a phase change point of the received light pulse.
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公开(公告)号：US20220170739A1
公开(公告)日：2022-06-02
申请号：US17599747
申请日：2019-04-03
Applicant: NEC Corporation
Inventor： Yoshimasa ONO , Akira TSUJI , Hidemi NOGUCHI , Junichi ABE
IPC: G01C3/06 , G01B11/30 , G01N21/956 , G01S17/06
Abstract: There is provided a surface abnormality detection device, and a system, capable of detecting an abnormal portion having a displacement below the distance measurement accuracy when detecting the abnormal portion on the surface of a structure. A surface abnormality detection device includes a classification means for classifying an object under measurement into one or more clusters having the same structure, based on position information at a plurality of points on a surface of the object under measurement; a determination means for determining a reflection brightness normal value of the cluster based on a distribution of reflection brightness values at a plurality of points on a surface of the cluster; and an identification means for identifying an abnormal portion on the surface of the cluster based on a difference between the reflection brightness normal value and the reflection brightness value at each of the plurality of points.
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公开(公告)号：US20220146674A1
公开(公告)日：2022-05-12
申请号：US17432561
申请日：2019-02-26
Applicant: NEC Corporation
Inventor： Hidemi NOGUCHI
IPC: G01S17/10 , G01S7/4865
Abstract: Generation unit generates a plurality of transmission pulses, the plurality of transmission pulses being formed so that phases in a plurality of respective regions of the transmission pulse can be different from each other, and being formed so that a phase difference between the phases in the plurality of respective regions of the transmission pulse is changed according to a transmission order of the transmission pulses. Transmission unit repeatedly transmits the generated transmission pulses. Receiving unit receives reflected pulses of the transmission pulses reflected on a distance-measurement-target object. Detection unit detects a phase difference between phases in a plurality of respective regions of the received reflected pulse. Distance calculation unit calculates a distance to the distance-measurement-target object based on a receiving timing of the received reflected pulse and a transmitting timing of the transmission pulse corresponding to the phase difference detected from the reflected pulse.
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公开(公告)号：US20210389432A1
公开(公告)日：2021-12-16
申请号：US17283300
申请日：2018-10-17
Applicant: NEC CORPORATION
Inventor： Hidemi NOGUCHI
IPC: G01S7/4865 , G01S17/26 , G01S17/14 , G01S7/484
Abstract: The generation unit (2) generates a transmission pulse set so that a time difference between times at which a plurality of transmission pulses are transmitted respectively differs according to the transmitting order of the transmission pulse set. A transmission unit (4) repeatedly transmits the generated transmission pulse set. A reception unit (6) receives reflected pulses of the transmission pulses reflected on a distance-measurement-target object. A specification unit (8) specifies a time difference between times at which a plurality of received reflected pulses are received. A distance calculation unit (10) calculates a distance to the distance-measurement-target object based on a receiving timing of the received reflected pulse and a transmitting timing of the transmission pulse corresponding to the time difference specified for the reflected pulse.
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Patent Agency Ranking
公开(公告)号：US20210356590A1
公开(公告)日：2021-11-18
申请号：US17284002
申请日：2018-10-17
Applicant: NEC Corporation
Inventor： Hidemi NOGUCHI
IPC: G01S17/26 , G01S7/4861 , G01S7/484
Abstract: A generation unit (2) generates a plurality of transmission pulses of which the strength of an optical signal changes in a pulse-like manner. Note that the generation part (2) generates a plurality of transmission pulses having frequency offsets different from each other. The transmission unit (4) repeatedly transmits transmission pulses generated by the generation unit (2). The reception part (6) receives reflected pulses of the respective transmission pulses reflected on a distance-measurement-target object. The detection unit (8) detects the frequency offsets of the reflected pulses received by the reception unit (6). The distance calculation unit (10) calculates a distance to the distance-measurement-target object based on the receiving timings of the reflected pulses received by the reception unit (6) and the transmitting timings of the transmission pulses corresponding to the frequency offsets detected from the reflected pulses.
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公开(公告)号：US20210041561A1
公开(公告)日：2021-02-11
申请号：US16762492
申请日：2018-12-05
Applicant: NEC Corporation
Inventor： Hidemi NOGUCHI , Junichi ABE
Abstract: A range finding apparatus (2000) generates a plurality of range finding signals. The range finding apparatus (2000) generates transmission light acquired by performing at least one of quadrature modulation and polarization modulation on an optical carrier wave by using each of the generated range finding signals. The range finding apparatus (2000) transmits the generated transmission light. The range finding apparatus (2000) receives reflection light which is the transmission light reflected by an object to be measured. The range finding apparatus (2000) extracts a reception signal corresponding to each of the range finding signals by demodulating the reflection light. The range finding apparatus (2000) computes a distance to the object to be measured by using any one or more of the extracted reception signals
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公开(公告)号：US20250091623A1
公开(公告)日：2025-03-20
申请号：US18820903
申请日：2024-08-30
Applicant: NEC Corporation
Inventor： Shingo YAMANOUCHI , Toshiyuki NOMURA , Junichi ABE , Hidemi NOGUCHI , Yoshimasa ONO , Tatsuya FUJIMOTO
Abstract: An obstacle monitoring system includes: a sensing means; a first obstacle detection means; and a control means for selectively executing a plurality of control modes including a first control mode in which a moving speed of a moving body is a first moving speed and a sensing field of view of the sensing means is a first field of view, and a second control mode in which a moving speed of the moving body is a second moving speed and a sensing field of view of the sensing means is a second field of view. When the first obstacle detection means detects the obstacle while the control means is executing the first control mode, the control means executes the second control mode in such a way as to capture the obstacle within the second field of view.
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公开(公告)号：US20250069263A1
公开(公告)日：2025-02-27
申请号：US18796607
申请日：2024-08-07
Applicant: NEC Corporation
Inventor： Tatsuya FUJIMOTO , Junichi ABE , Hidemi NOGUCHI
Abstract: An object detection system includes: a point cloud missing region extraction means for extracting a point cloud missing region being a region where a point cloud is missing in a three-dimensional point cloud; and an object estimation means for estimating presence of an object, based on the point cloud missing region.
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公开(公告)号：US20240410997A1
公开(公告)日：2024-12-12
申请号：US18701996
申请日：2021-11-05
Applicant: NEC Corporation
Inventor： Hidemi NOGUCHI
IPC: G01S7/487 , G01S7/4865 , G01S17/26
Abstract: Provided is a distance-measurement apparatus capable of preventing incorrect distance measurement. A generation unit generates a plurality of transmission pulses having frequency offsets different from each other. A transmission unit repeatedly transmits the transmission pulses generated by the generation unit. The reception unit receives reflected pulses of the respective transmission pulses reflected on a distance-measurement-target object. A detection unit detects frequency offsets of the reflected pulses received by the reception unit. A distance calculation unit calculates a distance to the distance-measurement-target object based on receiving timings of the reflected pulses received by the reception unit and transmitting timings of the transmission pulses corresponding to the frequency offsets detected from the reflected pulses. An invalidation processing unit performs processing of invalidating distance calculation processing for a certain period based on the transmitting timings of the transmission pulses.
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