Patent application number | Description | Published |
20090033911 | Laser Anemometry with Improved Eye Safety - The invention relates to an optical measurement device intended for determining a relative velocity vector {right arrow over (v)} of a carrier, such as an aircraft, with respect to a reference medium MILREF. The device includes an optical signal system EMIREC, delivering an optical signal Sinc that follows a direction called the line of sight LDV and is concentrated in a focusing zone ZOF, and means for displacing the focusing zone ZOF in the reference medium MILREF. According to the invention, the means for displacing the focusing zone ZOF act on the orientation of the line of sight LDV, subjecting it to a known movement, with a nonzero speed, a processing unit UTR determines the vector {right arrow over (v)} in at least one “search” phase based on an identification with an expected waveform of the variation in frequency of an electrical signal as a function of the orientation of the line of sight LDV in order to determine an approximate value of {right arrow over (v)}, followed by a “tracking” phase based on an iterative validation of values of {right arrow over (v)} close to the approximate value of {right arrow over (v)}. | 02-05-2009 |
20100134780 | Biaxial Laser Anemometry Probe - The subject of the present invention is a laser anemometry probe for optical homodyne detection of frequency offset by Doppler effect, comprising two devices (DERF | 06-03-2010 |
20110043786 | METHOD OF MEASURING THE VELOCITY OF AN AIRCRAFT BY LASER DOPPLER ANEMOMETRY - Method of measuring the velocity of an aircraft at a given instant, by laser Doppler anemometry, by performing the steps of acquiring a backscattered signal on at least three oriented line-of-sight axes, and calculating the spectrum of the backscattered signal on each of the line-of-sight axes. Further, acquiring an additional backscattered signal on at least one additional line-of-sight axis (X | 02-24-2011 |
20110141471 | OPTICAL ANEMOMETRIC PROBE WITH TWO MEASUREMENT AXES - An optical anemometric probe includes a laser source emitting a linearly polarized primary light beam and an optical block having splitting means for separating the primary beam, an optical reference pathway, an optical emission pathway and an optical measurement pathway. The optical block includes optical means of rotation of the polarization arranged at the output of the laser source and before the splitting means. The optical emission pathway has an optical circulator, a first optical emission/reception head illuminating a first measurement zone, and a second optical emission/reception head illuminating a second measurement zone. The optical circulator has four ports, e.g., a first input port, a second and a third input/ouput port linked respectively to the first optical head and to the second optical head, and a fourth port linked to the optical measurement pathway. | 06-16-2011 |
20110181863 | Single-Particle LIDAR Anemometry Method and System - The present invention concerns a single-particle LIDAR anemometry method and system comprising the continuous emission of one or more light beams through a gas containing particles, said beam being focused onto a measurement volume, a step of detecting a signal backscattered by particles passing through said volume, the method being characterized in that it comprises at least the following phases:
| 07-28-2011 |
20120140237 | Optical Device for Measuring Anemometer Parameters - The general field of the invention is that of optical devices designed for measuring anemometer parameters such as speed and temperature, the device being mounted on an aircraft and comprising an optical emission module illuminating the outside air, an optical reception module capable of receiving the light scattered by the air molecules, optical means forming a reference path and computing means connected to the reception module. The optical reception module comprises optical mixing means for mixing a portion of the beam originating from the reference path and a portion of the scattered light beam. The optical emission and reception means are arranged so that the reception device collects the light originating from the Brillouin-Mandel'shtam scattering. | 06-07-2012 |
20130142214 | LASER ANEMOMETRY PROBE SYSTEM AND METHOD EMPLOYING CONTINUOUS COHERENT DETECTION, WITH SINGLE-PARTICLE MODE, CAPABLE OF DETECTING ICE-FORMING CONDITIONS AND OF DETERMINING THE SEVERITY OF ICING - The laser anemometry probe (LAP) system with continuous coherent detection, with single-particle mode, comprises means (AN) for analysing the measurement signals of the said probe (LAP) and means (MES_T) for measuring the temperature (T). | 06-06-2013 |
20140119695 | OPTICAL SIGNAL EMISSION SYSTEM - Optical system has a passive optical chip on the top surface with a first wave guide and a laser diode arranged on the edge of the chip. The chip has a reflecting structure on the top surface at the wavelength of the laser diode and a thin layer portion powered by the laser diode and covering a part of the first wave guide. The first wave guide input is linked to the laser diode, passing through the reflecting structure. The chip has a second wave guide on the top surface, a first coupler formed by two first portions of the first wave guide not covered by the thin layer portion and situated on either side of the thin layer portion along the optical path, and a second coupler formed by two second portions, respectively of the first and second wave guides, not covered by the thin layer portion. | 05-01-2014 |
20140199020 | SYSTEM FOR TRANSMITTING OPTICAL SIGNALS - Optical signal emission system comprising a passive optical chip ( | 07-17-2014 |
20140247441 | METHOD FOR ESTIMATING THE TRANSVERSE COMPONENT OF THE VELOCITY OF THE AIR IN A DOPPLER LIDAR MEASUREMENT - A method for estimating the transverse component V | 09-04-2014 |