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1. 发明申请

US20210318421A1 SONAR APPARATUS, TARGET VELOCITY DISPLAY METHOD, AND NON-TRANSITORY MEDIUM 有权
公开(公告)号：US20210318421A1
公开(公告)日：2021-10-14
申请号：US17222042
申请日：2021-04-05
申请人： NEC Corporation
发明人： Hisashi SHIBA
IPC分类号： G01S7/62 , G01S15/58
摘要： A processor of a sonar system extracts a signal in a predetermined time range from a signal received by an acoustic array, calculates a correlation value for a signal waveform extracted, detects a peak value of the correlation value, calculates an integrated value by performing time-integration of a square of the correlation value, obtains a target velocity based on the peak value and the integrated value, and displays the target velocity on a display apparatus.

2. 发明申请

US20230043880A1 TARGET VELOCITY VECTOR DISPLAY SYSTEM, AND TARGET VELOCITY VECTOR DISPLAY METHOD AND PROGRAM 有权
公开(公告)号：US20230043880A1
公开(公告)日：2023-02-09
申请号：US17872412
申请日：2022-07-25
申请人： NEC Corporation
发明人： Hisashi SHIBA
IPC分类号： G01S15/58 , G01S7/56 , G01S15/66
摘要： A system including a transmitter and a receiver array at a location different from that of a transmitter, virtually divides the receiver array into plural sub-arrays, calculate Doppler coefficients based on movement of a target for the sub-arrays, calculates a velocity vector of a target, by using the Doppler coefficients calculated for the sub-arrays, and display velocity vector of the target.

3. 发明申请

US20150309173A1 ENVIRONMENT MEASUREMENT SYSTEM AND ENVIRONMENT MEASUREMENT METHOD 有权
标题翻译：环境测量系统和环境测量方法
公开(公告)号：US20150309173A1
公开(公告)日：2015-10-29
申请号：US14647356
申请日：2013-11-13
申请人： NEC CORPORATION
发明人： Hisashi SHIBA
IPC分类号： G01S15/88 , G01S7/60 , G01S7/539
CPC分类号： G01S15/88 , G01H5/00 , G01S7/52004 , G01S7/539 , G01S7/60 , G01S15/42
摘要： An environment measurement system according to the present invention is provided with a first unit comprising: a transmitter which is located undersea and transmits an acoustic wave in a designated direction a plurality of times; a first receiver which is located undersea and receives an acoustic wave reflected by a reflecting body at the sea surface or the seabed; a transmission direction setting unit which designates, to the transmitter, transmission directions specified in advance by a user, so as to cause the transmitter to transmit acoustic waves in the directions; a first necessary time measurement unit which, for each of the transmission directions, measures from the transmission and reception times of an acoustic wave a time necessary for the acoustic wave to return, as a necessary time, and outputs an average of the measured necessary time as an average necessary time for each of the transmission directions; a layer setting unit which partitions between the sea surface and the seabed into layers each extending horizontally, at intervals of preset distances; a simultaneous equations set-up unit which sets up simultaneous equations using the transmission directions, the necessary times and the layer thicknesses and taking average sound velocities in the respective layers as unknown variables; a simultaneous equations solving unit which solves the simultaneous equations; an initial parameter setting unit which sets initial values necessary for the simultaneous equations solving unit to solve the simultaneous equations, as parameter initial values; and a sound velocity profile output unit which creates a profile of sound velocities obtained by determining solutions acquired by the simultaneous equations solving unit to be average sound velocities in the respective layers and arranging the average sound velocities in the respective layers in order of depth, and outputs the profile.
摘要翻译：根据本发明的环境测量系统设置有第一单元，包括：发射机，其位于水下并且在指定方向上多次发射声波; 第一接收器，位于海底，并接收由反射体在海面或海底反射的声波; 发送方向设定单元，其向所述发送机指定用户预先指定的发送方向，以使所述发送机沿所述方向发送声波; 第一必需时间测量单元，对于每个传输方向，从声波的发送和接收时间测量声波返回所需的时间作为必要时间，并输出所测量的必要时间的平均值作为每个传输方向的平均必要时间; 层设置单元，其在海面和海床之间分隔成各自以预设距离的间隔水平延伸的层; 使用传输方向，必要时间和层厚度建立联立方程，并将各层中的平均声速作为未知变量的联立方程组建单元; 求解联立方程的联立方程求解单元; 初始参数设定单元，其将联立方程求解单元所需的初始值设置为求解联立方程，作为参数初始值; 以及声速分布输出单元，其通过将由所述联立方程求解单元获取的解决方案获得的声速的轮廓形成为各层中的平均声速，并且按深度的顺序排列各层中的平均声速，输出配置文件。

4. 发明申请

US20180024227A1 SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, RECORDING MEDIUM, TARGET DETECTION DEVICE, AND TARGET DETECTION METHOD 审中-公开
公开(公告)号：US20180024227A1
公开(公告)日：2018-01-25
申请号：US15549422
申请日：2016-02-18
申请人： NEC Corporation
发明人： Hisashi SHIBA
IPC分类号： G01S7/292 , G01S7/526 , G01S7/487
摘要： A signal processing device for processing a signal of a reflected wave which is a wave reflected in a medium and is received by a receiver, when a wave propagating through the medium is continuously transmitted by a transmitter. The signal processing device includes: an estimation unit configured to estimate a lower limit distance of a detection distance range for which an intensity level of a scattered wave from the medium in the detection distance range is equal to or smaller than an allowable level; and a scattering reduction unit configured to remove, from a signal of the reflected wave received, a signal of the scattered wave from the medium in a masking region from the receiver to the lower limit distance to perform output.

5. 发明申请

US20190195999A1 MOVING-TARGET DETECTION SYSTEM AND MOVING-TARGET DETECTION METHOD 审中-公开
公开(公告)号：US20190195999A1
公开(公告)日：2019-06-27
申请号：US16328016
申请日：2017-08-23
申请人： NEC CORPORATION
发明人： Hisashi SHIBA
IPC分类号： G01S13/50 , G01S13/524 , G01S13/56 , G01S13/58
CPC分类号： G01S13/505 , G01S7/292 , G01S13/524 , G01S13/56 , G01S13/581
摘要： In order to enhance the performance with which a moving target is detected by a single sensor and with a degree of freedom in a transmission waveform, a moving-target detection system 1 has a transmission waveform setting means 101 for setting a transmission waveform St(t), a transmission means 102 for transmitting a wave having the set transmission waveform St(t), a reception means 103 for receiving a wave including a reflected wave from a target, a Doppler shift estimation means 104 for estimating a Doppler shift that occurs due to movement of the target from the transmission waveform St(t) and a reception waveform Sr(t) including the reflected wave, a transmission waveform deformation means 105 for generating a deformed transmission waveform in which the transmission waveform St(t) is deformed in accordance with the estimated Doppler shift, and a target sensing means 106 for sensing the target using the deformed transmission waveform.

6. 发明申请

US20190025419A1 MOVING OBJECT DETECTION SYSTEM AND MOVING OBJECT DETECTION METHOD 审中-公开
公开(公告)号：US20190025419A1
公开(公告)日：2019-01-24
申请号：US16040674
申请日：2018-07-20
申请人： NEC Corporation
发明人： Hisashi SHIBA
IPC分类号： G01S13/56 , G01S13/53
摘要： A moving object detection system comprises: a transmission waveform setting section to set a transmission signal in such a way that a frequency of the transmission signal is linearly changed; a transmitting section to transmit the transmission signal; a receiving section to receive a reception signal resulting from a reflection of the transmission signal at an object; a Doppler coefficient estimating section to estimate a Doppler coefficient associated with a movement of the object by performing arithmetic processing on a waveform of the reception signal at a present time point and waveforms of the reception signal at one or more past time points, the one or more past time points being earlier than the present time point by one or more specified periods of time; and an object detection section to detect the object based on the transmission signal, the Doppler coefficient, and the reception signal.

7. 发明申请

US20170184712A1 TARGET DETECTION DEVICE 审中-公开
公开(公告)号：US20170184712A1
公开(公告)日：2017-06-29
申请号：US15313677
申请日：2015-06-01
申请人： NEC CORPORATION
发明人： Hisashi SHIBA
IPC分类号： G01S7/526 , G01S7/524
CPC分类号： G01S7/526 , G01S7/524 , G01S15/88
摘要： The present invention enables control of the specifications of a transmission unit and reception unit in a manner so as to reduce the effect of scattered waves reaching the reception unit as a result of scattering caused by the medium through which wave propagates. This target detection device has a transmission unit, a reception unit, a detection unit, and a control unit. The control unit controls the specifications of the transmission unit and reception unit in a manner so as to satisfy a relational equation for reducing the effect of scattered waves reaching the reception unit due to scattering caused by the medium through which wave propagates. The transmission unit transmits wave, and the reception unit receives the reflection wave of the wave reflected by a detection subject. The detection unit detects the detection subject on the basis of the output of the reception unit.

8. 发明申请

US20130142437A1 Pose Estimation 有权
公开(公告)号：US20130142437A1
公开(公告)日：2013-06-06
申请号：US13754084
申请日：2013-01-30
申请人： NEC Corporation
发明人： Hisashi SHIBA
IPC分类号： G06K9/52
CPC分类号： G06K9/46 , G06K9/4633 , G06K9/52 , G06T7/74
摘要： In a pose estimation for estimating the pose of an object of pose estimation with respect to a reference surface that serves as a reference for estimating a pose, a data processing device: extracts pose parameters from a binarized image; identifies a combination of pose parameters for which the number of cross surfaces of parameter surfaces that accord with surface parameter formulas, which are numerical formulas for expressing a reference surface, is a maximum; finds a slope weighting for each of cross pixels, which are pixels on each candidate surface and which are pixels within a prescribed range, that is identified based on the angles of the tangent plane at the cross pixel and based on planes formed by each of the axes of parameter space; and identifies the significant candidate surface for which a number, which is the sum of slope weightings, is a maximum, as the actual surface that is the reference surface that actually exists in the image.

9. 发明公开

US20240327043A1 UNAUTHORIZED READOUT PREVENTION MECHANISM AND UNMANNED VEHICLE 审中-公开
公开(公告)号：US20240327043A1
公开(公告)日：2024-10-03
申请号：US18589506
申请日：2024-02-28
申请人： NEC Corporation
发明人： Hisashi SHIBA
IPC分类号： B64U20/80 , G06F21/10 , G11B20/00
CPC分类号： B64U20/80 , G06F21/109 , G11B20/00666 , G06F2221/2143
摘要： An unauthorized readout prevention mechanism includes a power source unit provided outside a casing provided in an unmanned vehicle, a power line for supplying power from the power source unit to a volatile region inside the casing, an opening-closing unit provided in the casing, and a switch that physically separates the power line and shuts off supply of power to inside the casing when the opening-closing unit is opened.

10. 发明申请

US20200379078A1 DIRECTION-OF-ARRIVAL ESTIMATION APPARATUS, METHOD, AND NON-TRANSITORY MEDIUM 审中-公开
公开(公告)号：US20200379078A1
公开(公告)日：2020-12-03
申请号：US16884157
申请日：2020-05-27
申请人： NEC CORPORATION
发明人： Hisashi SHIBA
IPC分类号： G01S3/50 , H01Q21/06 , G01S13/06 , G01S3/04
摘要： A direction of arrival estimation apparatus includes at least first and second sub-arrays to receive a reflected wave of a transmission waveform from a target; first and second phasing parts that perform phasing of reception signals at the first and second sub-arrays to generate first and second sub-array beams; an arrival time difference calculation part that calculates first and second correlations of the reception signals of the first and second sub-array beams at first and second time points to find an arrival time difference between times of the reflected wave arriving at the first and second sub-arrays, based on a result of a predetermined operation on the first and second correlations and a time difference between the first time point and the second time point; and a direction of arrival calculation part that finds a direction of arrival of the target based on the arrival time difference.

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