| 摘要 |
<p>The invention concerns an optical measuring device for evaluating a relative speed vector V of a carrier, such as an aircraft, with respect to a reference environment (MILREF). The device comprises an optical signal channel (EMIREC), supplying an optical signal (Sinc) which follows a direction called line of sight (LDV) and which is concentrated in a focusing zone (ZOF), means for displacing the focusing zone (ZOF) in the reference environment (MILREF). The invention is characterized in that the means for displacing the focusing zone (ZOF) act upon the orientation of the line of sight (LDV), imparting thereto a known movement, of non-null speed, a processing unit (UTR) evaluates the vector V in at least one searching phase based on an identification with an expected shape of the evolution of the frequency of an electric signal based on the orientation of the line of sight (LDV) to determine an approximate value of V, followed by a tracking phase based on an iterative validation of values of V, close to the approximate value of V.</p> |
