公开(公告)号：US09019481B2

公开(公告)日：2015-04-28

申请号：US13644573

申请日：2012-10-04

Applicant: Japan Aerospace Exploration Agency

Inventor： Takashi Asahara ,  Hamaki Inokuchi

IPC: G01P3/36 ,  G01S17/95 ,  G01S17/58 ,  G01S7/487

CPC classification number: G01S17/95 ,  G01S7/4876 ,  G01S17/58 ,  Y02A90/19

Abstract: An object of the present invention is to provide an optical remote airflow measurement apparatus with which even colored noise corresponding to an external environment of the apparatus can be reduced, thereby reducing measurement reliability deterioration and enabling long-distance measurement in a wide flying speed range. A colored noise reduction method according to the present invention includes: considering a signal strength of scattered light to be substantially non-existent in a remotest region and beyond; calculating a noise distribution by performing processing to average the signal strength in respective Doppler frequency components divided at intervals of a certain frequency in the remotest measurement region and beyond, and performing subtraction processing in each of the Doppler frequency components on all signal strength distributions of the measurement region, which are obtained by dividing the noise distribution at intervals of a certain distance.

Abstract translation: 本发明的目的是提供一种光学远程气流测量装置，可以减少与设备的外部环境相对应的彩色噪声，从而降低测量可靠性劣化，并能够在宽飞行速度范围内实现长距离测量。 根据本发明的彩色降噪方法包括：考虑到在最远的区域以外基本不存在散射光的信号强度; 通过对最远的测量区域以外的特定频率的间隔分割的各个多普勒频率成分的信号强度进行平均化处理来计算噪声分布，对所述多普勒频率成分的各信号强度分布进行减法处理 测量区域，其通过以一定距离的间隔分割噪声分布而获得。

公开(公告)号：US20130088705A1

公开(公告)日：2013-04-11

申请号：US13644573

申请日：2012-10-04

Applicant: JAPAN AEROSPACE EXPLORATION AGENCY

Inventor： Takashi Asahara ,  Hamaki Inokuchi

IPC: G01P3/36

CPC classification number: G01S17/95 ,  G01S7/4876 ,  G01S17/58 ,  Y02A90/19

Abstract: A colored noise reduction method for an optical remote airflow measurement apparatus, which emits laser light into the atmosphere as a transmission signal and measures a wind speed of an airflow in a remote region on the basis of a Doppler shift amount of a frequency between the transmission signal and a reception signal, includes: considering a signal strength of scattered light to be substantially non-existent in a remotest region and beyond; calculating a noise distribution by performing processing to average the signal strength in respective Doppler frequency components divided at intervals of a certain frequency in the remotest measurement region and beyond, and performing subtraction processing in each of the Doppler frequency components on all signal strength distributions of the measurement region, which are obtained by dividing the noise distribution at intervals of a certain distance.

Abstract translation: 一种用于光学远程气流测量装置的彩色降噪方法，其将激光发射到大气中作为传输信号，并且基于传输之间的频率的多普勒频移量来测量远程区域中的气流的风速 信号和接收信号，包括：考虑到在最远的区域以内基本上不存在散射光的信号强度; 通过对最远的测量区域以外的特定频率的间隔分割的各个多普勒频率成分的信号强度进行平均化处理来计算噪声分布，对所述多普勒频率成分的各信号强度分布进行减法处理 测量区域，其通过以一定距离的间隔分割噪声分布而获得。