公开(公告)号：US20140247441A1

公开(公告)日：2014-09-04

申请号：US14052588

申请日：2013-10-11

Applicant: THALES

Inventor： Xavier LACONDEMINE ,  Gregory BARAL-BARON ,  Jean-Pierre SCHLOTTERBECK ,  Philippe RONDEAU

IPC: G01S17/95

CPC classification number: G01S17/95 ,  G01P5/26 ,  G01S7/484 ,  G01S7/4861 ,  G01S7/487 ,  G01S17/58 ,  G01S17/88 ,  Y02A90/19

Abstract: A method for estimating the transverse component Vtrans of the velocity of the air comprises the following steps: emitting a focused laser beam; acquiring an electrical signal resulting from the transit of a particle across the beam at a point of transit; analysing the signal so as to obtain a spectrogram revealing an elongate mark representative of the transit; estimating the duration of traversal of the laser beam by the particle and the slope of the mark; deducing from the duration and from the slope the distance between the point of traversal of the beam and the focusing point; determining the radius of the beam at the point of transit; deducing the transverse component from the radius and from the duration.

Abstract translation: 用于估计空气速度的横向分量Vtrans的方法包括以下步骤：发射聚焦激光束; 获取由在过境点处的粒子穿过射束的过程而产生的电信号; 分析信号，以获得显示代表运输的细长标记的频谱图; 估计粒子穿过激光束的持续时间和标记的斜率; 从持续时间和斜率推导出光束穿透点与聚焦点之间的距离; 确定在过境点的梁的半径; 从半径和持续时间推导出横向分量。