The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2013
Filed:
Jun. 23, 2010
Xavier Lacondemine, Vilie, FR;
Jean-pierre Schlotterbeck, Rochefort/Samson, FR;
Alain Renard, Chabeuil, FR;
Xavier Lacondemine, Vilie, FR;
Jean-Pierre Schlotterbeck, Rochefort/Samson, FR;
Alain Renard, Chabeuil, FR;
Thales, Neuilly sur Seine, FR;
Abstract
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) not coincident with one of the three first line-of-sight axes (X, X, X), and calculating the spectrum of the backscattered signal on the additional line-of-sight axis (X). Several candidate velocity vectors ({right arrow over (V)}c) and of the projections of the candidate vectors on at least one line-of-sight axis (X, X, X, X) are calculated. The consistency of the candidate vectors ({right arrow over (V)}c) is calculated as a function of their projections and as a function of each spectrum of the corresponding backscattered signal on the respective calculation axis (X, X, X, X). The measured velocity vector ({right arrow over (V)}c) is chosen from among the candidate velocity vectors ({right arrow over (V)}c).