-
公开(公告)号：EP3287810B1
公开(公告)日：2019-10-09
申请号：EP16871786.6
申请日：2016-06-27
-
公开(公告)号：EP3767340A1
公开(公告)日：2021-01-20
申请号：EP18916872.7
申请日：2018-04-26
摘要： A laser radar device (3) calculates a wind speed for each of a plurality of divided sections obtained by dividing a trajectory (B) drawn by a laser beam (A) in front of a wind turbine (2).
-
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.
-
公开(公告)号：EP3287810A1
公开(公告)日：2018-02-28
申请号：EP16871786.6
申请日：2016-06-27
CPC分类号： G01S7/497 , G01P5/26 , G01S7/4813 , G01S17/58 , G01S17/95 , G01S2007/4977 , Y02A90/19
摘要： A lidar apparatus 100 includes: a precipitation determiner 29 determining whether precipitation exists on an external surface of a light transmission window 51, from at least one of a measurement success or failure result 34 representing whether a wind velocity vector is measured and a signal-to-noise ratio 35 as well as from a wiper operation 32 in a first period; a foreign matter detector 30 detecting foreign matter hindering laser light and reflected light from passing through the light transmission window 51, based on at least one of the measurement success or failure result 34 and the signal-to-noise ratio 35; and a wiper operation controller 30 controlling a wiper 52 and a washer fluid supplier 61. When the precipitation determiner 29 determines that precipitation exists, the wiper operation controller 30 causes the wiper 52 to operate and the washer fluid supplier 61 not to operate. When the precipitation determiner 29 does not determine that precipitation exists while the foreign matter detector 30 detects that foreign matter exists, the wiper operation controller causes the washer fluid supplier 61 and the wiper 52 to operate.
摘要翻译： 激光雷达设备100包括：降雨确定器29，根据表示风速矢量是否被测量的测量成功或失败结果34以及信号到信号中的至少一个来确定降光是否存在于透光窗口51的外表面上 噪音比35以及来自擦拭器操作32的第一时间段; 基于测量成功或失败结果34和信噪比35中的至少一个，异物检测器30检测阻碍激光和反射光穿过光透射窗口51的异物; 以及控制擦拭器52和清洗液供给器61的擦拭器操作控制器30.当雨量判定器29判定存在雨量时，雨刮器操作控制器30使擦拭器52运行并且清洗液供给器61不运行。 在异物检测部30检测到异物存在的期间，在降水判定部29未判定为有降水的情况下，雨刮器动作控制部使清洗液供给部61和擦拭器52动作。
-
公开(公告)号：EP3767339A1
公开(公告)日：2021-01-20
申请号：EP18915710.0
申请日：2018-04-18
发明人： KOTAKE, Nobuki , KAJIYAMA, Yutaka
IPC分类号： G01S17/95
摘要： In a conventional laser radar device, there has been a problem that since a distance resolution is changed in advance depending on a measurement distance, it is necessary to perform measurement again after changing the distance resolution. A laser radar device of the present invention includes: an optical oscillator oscillating laser light; an optical modulator modulating the laser light oscillated by the optical oscillator; an optical antenna radiating the laser light modulated by the optical modulator to an atmosphere, and receiving scattered light from a radiation target as received light; an optical receiver performing heterodyne detection on the received light received by the optical antenna; and a signal processor calculating for a range bin a spectrum of a received signal obtained by the heterodyne detection by the optical receiver, calculating a signal to noise ratio of the range bin, and integrating the spectrum of the range bin and spectra of one or more range bins adjacent to the range bin when the signal to noise ratio is less than or equal to a threshold value.
-
公开(公告)号：EP3982158A1
公开(公告)日：2022-04-13
申请号：EP20818458.0
申请日：2020-05-22
摘要： A coherent lidar device (100) includes a transmission and reception unit (30) to transmit an optical signal to the atmosphere and to receive scattered light of the optical signal, a first switch (9) to divide temporally a reception signal generated from the scattered light received by the transmission and reception unit (30) into two signals, a microwave amplifier (10) to amplify the two signals divided by the first switch (9) at amplification factors different from each other, a microwave switch (11) to multiplex the two signals amplified by the microwave amplifier (10) at the amplification factors different from each other into one signal, an A/D converter (12) to convert the one signal multiplexed by the microwave switch (11) into a digital signal, a signal processing unit (13) to process the digital signal, and a control unit (14) to control operations of the transmission and reception unit (30), the first switch (9), the microwave switch (11), and the A/D converter (12).
-
公开(公告)号：EP3955029A1
公开(公告)日：2022-02-16
申请号：EP20787774.7
申请日：2020-04-08
IPC分类号： G01S17/95
摘要： In the conventional methods, the prediction accuracy of information of an incoming wind such as the incoming wind speed, the shear, or the wind direction decreases.
A wind measurement lidar device 1B is mounted on a wind turbine 2 and transmits transmission light, which is pulses of laser light, into the atmosphere in a plurality of beam directions determined with respect to a front direction of the wind turbine 2 and measures the wind speed at each of a plurality of distances from the wind turbine in the plurality of beam directions from a Doppler frequency shift of reflection light, which is the transmission light reflected by particles moving together with the atmosphere, with respect to the transmission light. Included are: spectrum integrating units 12c and 12e to obtain an integrated spectrum obtained by integrating spectra obtained from a plurality of divided reception signals of a plurality of the pulses transmitted after the wind speed is calculated in a previous time for each of a plurality of wind speed measurement sections being a combination of a beam direction and a time interval; a wind speed calculating unit 12h to calculate the wind speed in each of the plurality of wind speed measurement sections from the integrated spectrum having an SN ratio greater than or equal to a first threshold value; and an incoming wind information predicting unit 16 to predict incoming wind information which is information of incoming wind, which is wind arriving at and coming to the wind turbine 2, based on the wind speed of each of the plurality of wind speed measurement sections.
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.011 秒)
