公开(公告)号：US20170138908A1

公开(公告)日：2017-05-18

申请号：US15129817

申请日：2014-12-26

Applicant: NEC Corporation

Inventor： Kiyokazu MIKI ,  Osamu HOSHUYAMA

IPC: G01N29/04 ,  E02D33/00

CPC classification number: G01N29/045 ,  E02D27/00 ,  E02D33/00 ,  G01N2291/0258 ,  G01N2291/2691

Abstract: An anchor bolt diagnosing system includes a vibration sensing clip that clips an anchor bolt, and senses a vibration power of the anchor bolt, a blow sensing hammer that gives a blow to the anchor bolt clipped by the vibration sensing clip, and senses blow strength, and a diagnoser that obtains the vibration power and the blow strength output from the vibration sensing clip and the blow sensing hammer, and diagnoses soundness of the anchor bolt in accordance with whether a ratio of the vibration power to the blow strength is higher than a predetermined value.

公开(公告)号：US20220221577A1

公开(公告)日：2022-07-14

申请号：US17613210

申请日：2019-05-29

Applicant: NEC Corporation

Inventor： Daisuke IKEFUJI ,  Taichi TANAKA ,  Osamu HOSHUYAMA

IPC: G01S13/90

Abstract: The signal processing device includes an interference processing unit which generates an interferogram from a plurality of SAR images, a coherence calculation unit which calculates coherence of the SAR images, a singular point processing unit which performs an operation for resolving singular points in the interferogram, a phase unwrapping unit which executes a phase unwrapping process using operation result of the singular point processing unit, and an SBAS analysis unit which performs displacement analysis by SBAS, using processing result of the phase unwrapping unit.

公开(公告)号：US20210181336A1

公开(公告)日：2021-06-17

申请号：US16759887

申请日：2018-10-04

Applicant: NEC Corporation

Inventor： Taichi TANAKA ,  Osamu HOSHUYAMA

IPC: G01S13/90

Abstract: Persistent scatterers on images and a target object are readily associated with each other. There is provided an image processing apparatus including a persistent scatterer specifier, a phase acquirer, and a clustering unit. The persistent scatterer specifier of the image processing apparatus specifies persistent scatterers at which reflection is stable in a plurality of images. The phase acquirer of the image processing apparatus acquires phases of the specified persistent scatterers. The clustering unit of the image processing apparatus clusters the persistent scatterers based on the positions of the persistent scatterers and the phases.

公开(公告)号：US20210072376A1

公开(公告)日：2021-03-11

申请号：US16771450

申请日：2018-10-10

Applicant: NEC Corporation

Inventor： Daisuke IKEFUJI ,  Taichi TANAKA ,  Osamu HOSHUYAMA

IPC: G01S13/90 ,  G01S13/88 ,  G01S13/00

Abstract: A synthetic aperture radar signal processing device 10 includes a persistent scatterer extraction unit 11 which extracts, from time-series observation data related to an observation target observed from a plurality of observation directions by a radar, a plurality of persistent scatterers in respective observation directions; a persistent scatterer grouping unit 12 which groups the plurality of persistent scatterers in each of the observation directions; a group selection unit 13 which selects, in each of the observation directions, a persistent scatterer group that includes the persistent scatterers included in an analysis target from among groups generated by grouping; and a displacement speed processing unit 14 which synthesize displacement speeds of the selected persistent scatterer groups.

公开(公告)号：US20230133736A1

公开(公告)日：2023-05-04

申请号：US17912165

申请日：2020-03-24

Applicant: NEC Corporation

Inventor： Taichi TANAKA ,  Osamu HOSHUYAMA

IPC: G01S13/90 ,  G06T7/00

Abstract: The image analyzing device includes an inter-image phase difference calculation unit 12 calculating a phase difference image of a pair of images, an inter-pixel phase difference calculation unit 13 calculating a phase difference between close pixels in the phase difference image, an evaluation function generation unit 14 generating an evaluation function that includes at least the phase difference between pixels, an optimization unit 15 optimizing the evaluation function for each pair of pixels or each pair of close pixels, a random number generation unit 21 generating a random number, a threshold setting unit 22 setting a threshold based on a result of evaluation of the random number using the evaluation function, and a merging unit 17 obtaining merged data of an entire image by merging values of variables when the optimization unit 15 performs optimization except for variables for which evaluation value using the evaluation function is below the threshold.

公开(公告)号：US20200348411A1

公开(公告)日：2020-11-05

申请号：US16767805

申请日：2017-12-01

Applicant: NEC Corporation

Inventor： Taichi TANAKA ,  Osamu HOSHUYAMA

IPC: G01S13/90

Abstract: This invention is directed to an image processing apparatus that generates an evaluation index of a persistent scatterer likelihood without any influence of a large phase change with respect to a target whose displacement is nonlinear, a target whose elevation is high, or a target whose displacement is large. The image processing apparatus includes a phase array accumulator that accumulates phase arrays of respective pixels over a plurality of images, a clustering unit that classifies the respective pixels into a plurality of clusters based on the phase arrays, and a phase correlation calculator that calculates a correlation between a phase change in each of the plurality of clusters and the phase array at the respective pixels.

公开(公告)号：US20190353768A1

公开(公告)日：2019-11-21

申请号：US16472940

申请日：2016-12-26

Applicant: NEC Corporation

Inventor： Osamu HOSHUYAMA ,  Manabu ARIKAWA

IPC: G01S13/28 ,  G01S7/292 ,  G01S13/90 ,  G01S7/40

Abstract: The present invention is a signal processing device that efficiently removes multiple types of interference waves mixed in with a received signal. This signal processing device is provided with: a first extraction unit that performs deconvolution with respect to a cross-correlation of a reference signal and a received signal and to an autocorrelation of the reference signal, and extracts a channel response to the reference signal; a second extraction unit that extracts a main channel response corresponding to the reference signal from the channel response; and a removal unit that restores a signal by performing convolution with respect to the reference signal and the main channel response, and removes the restored signal from the received signal.

公开(公告)号：US20180090153A1

公开(公告)日：2018-03-29

申请号：US15571914

申请日：2016-04-14

Applicant: NEC Corporation ,  NEC Engineering, Ltd.

Inventor： Osamu HOSHUYAMA ,  Ryoji MIYAHARA ,  Akihiko SUGIYAMA

IPC: G10L21/0232 ,  H04R1/40 ,  G10L25/84 ,  H04R3/00

CPC classification number: G10L21/0232 ,  G10L21/0208 ,  G10L25/84 ,  G10L2021/02165 ,  H04M1/026 ,  H04M1/6008 ,  H04R1/086 ,  H04R1/406 ,  H04R3/00 ,  H04R3/005 ,  H04R2201/401 ,  H04R2201/405 ,  H04R2410/07

Abstract: There is provided a signal processing apparatus that obtains a speech signal with sufficiently reduced wind noise. The signal processing apparatus includes a main microphone that is provided so as to be readily influenced by movement of air outside the signal processing apparatus, a sub microphone that is provided so as to be hardly influenced by movement of air outside the signal processing apparatus, a determiner that determines, based on a strength of a main speech signal output from the main microphone, whether the main speech signal includes a predetermined amount of wind noise, and a selector that receives the main speech signal and a sub speech signal output from the sub microphone, executes, if it is determined that the main speech signal includes the predetermined amount of wind noise, selection processing for outputting the sub speech signal, and executes, if it is determined that the main speech signal includes no predetermined amount of wind noise, selection processing for outputting the main speech signal.

公开(公告)号：US20170016983A1

公开(公告)日：2017-01-19

申请号：US15124200

申请日：2014-12-26

Applicant: NEC Corporation

Inventor： Osamu HOSHUYAMA

IPC: G01S13/34 ,  G01S7/536 ,  G01S15/58 ,  G01S7/35 ,  G01S15/34 ,  G01S13/58

CPC classification number: G01S13/34 ,  G01S7/354 ,  G01S7/536 ,  G01S13/343 ,  G01S13/584 ,  G01S13/881 ,  G01S13/886 ,  G01S13/931 ,  G01S15/34 ,  G01S15/586 ,  G01S15/88 ,  G01S15/931

Abstract: To acquire a beat frequency necessary for target extraction, target speed estimation, and Doppler influence detection by preventing the necessary beat frequency from overlapping unnecessary frequencies in a heterodyne processing result, an apparatus includes a wave receiver that receives a reflected wave of a chirp wave reflected from a target, and outputs a reception wave signal, a dual-sweep signal generator that generates a dual-sweep signal of the chirp wave, having a frequency which does not overlap that of the chirp wave, and a heterodyne processor that generates a beat frequency by multiplying the reception wave signal and the dual-sweep signal as a heterodyne signal.

Abstract translation: 为了通过在外差处理结果中防止必要的拍频重叠不必要的频率来获取目标提取，目标速度估计和多普勒影响检测所需的拍频，装置包括接收反射的啁啾波的反射波的波接收器 并且输出接收波信号，产生具有不与啁啾波的频率重叠的啁啾波的双扫描信号的双扫描信号发生器，以及产生拍子的外差处理器 将接收波信号和双扫描信号相乘作为外差信号。

公开(公告)号：US20210239829A1

公开(公告)日：2021-08-05

申请号：US16972155

申请日：2018-06-06

Applicant: NEC Corporation

Inventor： Kazumine OGURA ,  Masayuki ARIYOSHI ,  Yuzo SENDA ,  Osamu HOSHUYAMA ,  Taichi TANAKA ,  Daisuke IKEFUJI ,  Shingo YAMANOUCHI

IPC: G01S13/90 ,  G01S7/04 ,  G01S13/32 ,  G01S13/86

Abstract: A radar signal imaging device 30 includes: a transmission unit 31 which transmits a radar signal toward an object to be imaged that is a non-rigid body; a position estimation unit 32 which estimates the position of the object; an oscillation degree estimation unit 33 which estimates an oscillation degree which is a degree of change within a predetermined period in the relative positions of feature points constituting the object; and a synthetic aperture processing unit 34 which performs synthetic aperture processing on the radar signal reflected by the object on the basis of the estimated position of the object and the estimated oscillation degree.