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公开(公告)号：EP4283338A1
公开(公告)日：2023-11-29
申请号：EP21927863.7
申请日：2021-02-26
发明人： NOMURA, Junia , IMAKI, Masaharu , KAMEYAMA, Shumpei , ITO, Yusuke
IPC分类号： G01S17/58
摘要： A signal processing device (15) is configured to calculate, as a moving speed of each of a plurality of observation targets present in a space, a relative speed of each of the observation targets with respect to a lidar device. A plurality of light pulses having different optical frequencies from each other are generated from a laser beam output from a light source (1), each of the light pulses radiated to the space and then scattered by each of the observation targets is received as scattered light, and multiplexed light of each of the scattered light and the laser beam is detected. The signal processing device (15) includes: a Doppler frequency calculating unit (16) to calculate a Doppler frequency that is included in an optical frequency of each of the scattered light and due to movement of each of the observation targets from the optical frequencies of the plurality of generated light pulses and a detection signal of each of the multiplexed light; and a speed calculating unit (17) to calculate a relative speed of each of the observation targets from each of the Doppler frequency calculated by the Doppler frequency calculating unit (16).
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公开(公告)号：EP3789786A1
公开(公告)日：2021-03-10
申请号：EP18922029.6
申请日：2018-06-08
摘要： An optical axis correction unit (12) includes an optical axis shift azimuth correction unit (13) for correcting an azimuth component of an optical axis angular shift and an optical axis shift elevation angle correction unit (14) for correcting an elevation angle component of the optical axis angular shift. The optical axis shift azimuth correction unit (13) is disposed separately from the optical axis shift elevation angle correction unit (14).
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公开(公告)号：EP2896972B1
公开(公告)日：2019-10-30
申请号：EP13837680.1
申请日：2013-05-16
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公开(公告)号：EP3428685A1
公开(公告)日：2019-01-16
申请号：EP16897856.7
申请日：2016-04-05
发明人： KOTAKE, Nobuki , KAMEYAMA, Shumpei
摘要： In conventional laser radar systems, the wind velocity measurement accuracy cannot be improved without changing their time gate widths, which is a problem.
A laser radar system according to the present invention includes: an optical oscillator to perform laser light oscillation; an optical modulator to modulate the laser light by oscillation of the optical oscillator; an optical antenna to emit the laser light modulated by the optical modulator into the atmosphere and to receive scattered light from an irradiated target as reception light; an optical receiver to perform heterodyne detection on the reception light received by the optical antenna; and a signal processor to calculate a spectrum of a reception signal obtained by the optical receiver's performing heterodyne detection, to decompose the spectrum using signal-to-noise ratios, and to calculate a velocity of an irradiated target from a decomposed spectrum.-
公开(公告)号：EP2884306B1
公开(公告)日：2017-09-13
申请号：EP13827399.0
申请日：2013-03-04
CPC分类号： G01S17/95 , G01S7/4817 , G01S7/4818 , G01S7/484 , G01S7/4868 , G01S7/487 , G01S17/42 , G01S17/58 , Y02A90/19
摘要： An optimal position analysis unit 24 specifies an optimal installation position for a photodetector 6 by using spectra which by a spectrum and wind speed computing unit 23 calculated by analyzing output data of a photodetector 6 installed at different installation positions, controls a position adjustment made by an optical unit adjustment driving unit 7, and optimizes the installation position of the photodetector 6.
摘要翻译： 最佳位置分析单元24通过使用频谱和风速计算单元23通过分析安装在不同安装位置处的光电检测器6的输出数据而计算出的频谱来指定光电检测器6的最佳安装位置， 光学单元调节驱动单元7，并优化光电探测器6的安装位置。
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公开(公告)号：EP4449984A1
公开(公告)日：2024-10-23
申请号：EP22924856.2
申请日：2022-02-07
IPC分类号： A61B5/08
摘要： A respiratory sensor (10) includes: a light wave circuit (K1) including a light projecting unit (112) that emits light toward exhaled air or inhaled air and a light receiving unit (11J) that receives the light emitted by the light projecting unit, and formed on a semiconductor wafer; and a detection unit (11S) that detects a state of the exhaled air or the inhaled air from the light received by the light receiving unit.
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公开(公告)号：EP3955028A1
公开(公告)日：2022-02-16
申请号：EP20787733.3
申请日：2020-01-27
IPC分类号： G01S17/95
摘要： The measurement accuracy of the wind speed at a long distance is improved without lowering a wind speed measurement rate at a short distance. A wind measurement lidar device 1 includes: a beam switching unit 8 to switch to another beam direction when beam selection time elapses in one beam direction, the beam selection time being time in which pulses of greater than or equal to a predetermined minimum number of pulses are generated; an integrated spectrum storage unit 12d to store an integrated spectrum obtained by integrating spectra for each of wind speed measurement sections being a combination of a beam direction and a time interval; spectrum integrating units 12c, 12e to generate an integrated spectrum by integrating, for each of the wind speed measurement sections, a plurality of spectra obtained from a plurality of the pulses transmitted in succession in a beam direction and an integrated spectrum being stored in the integrated spectrum storage unit; a wind speed calculating unit 12h to calculate the wind speed when the SN ratio of the integrated spectrum is greater than or equal to a first threshold value; and a stored integrated spectrum correcting unit 12j to store an integrated spectrum integrated for one of the wind speed measurement sections, for which no wind speed is calculated, into the integrated spectrum storage unit 12d.
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公开(公告)号：EP3879304A1
公开(公告)日：2021-09-15
申请号：EP18942552.3
申请日：2018-12-06
发明人： ITO, Yusuke , YANAGISAWA, Takayuki , ARUGA, Hiroshi , IMAKI, Masaharu , YOSHIKI, Wataru , KAMEYAMA, Shumpei
IPC分类号： G01S7/481
摘要： In a conventional laser radar device, when there is a mechanical scan angle dynamic range in a movable optical element for performing a beam scan, a viewing angle of the device is limited disadvantageously due to limitation of a beam scan area.
A laser radar device of the present invention includes: a light source for outputting laser light; a scanner for causing the laser light to scan; a first optical system for receiving the laser light caused to scan by the scanner and incident on the first optical system, and emitting the incident laser light in such a manner that a horizontal component of the incident laser light is different from a horizontal component of the laser light to be emitted; and a second optical system for receiving the laser light caused to scan by the scanner and incident on the second optical system, and emitting the incident laser light in such a manner that an incident area of the incident laser light in the horizontal direction is the same as an incident area of the first optical system in the horizontal direction, and an emission area of the incident laser light is different from an emission area of the first optical system.-
公开(公告)号：EP3056924B1
公开(公告)日：2020-01-01
申请号：EP13895308.8
申请日：2013-10-11
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公开(公告)号：EP3564652A1
公开(公告)日：2019-11-06
申请号：EP17894031.8
申请日：2017-01-24
发明人： IMAKI, Masaharu , KAMEYAMA, Shumpei
IPC分类号： G01N21/27
摘要： A frequency shift correcting unit (25) which corrects a frequency shift of a plurality of first signal spectra within the same time range with respect to a frequency of first laser light beam and corrects a frequency shift of a plurality of second signal spectra within the same time range with respect to a frequency of second laser light beam, and a spectrum integrating unit (26) which integrates a plurality of first signal spectra corrected by the frequency shift correcting unit (25) and integrates a plurality of second signal spectra corrected by the frequency shift correcting unit (25) are provided, and a molecular concentration calculating unit (27) calculates a concentration of molecules in the atmosphere from the first and second signal spectra integrated by the spectrum calculating unit (26).
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