| 摘要 |
<p>The invention concerns a laser anemometer for determining the relative speed between the anemometer and an ambient milieu. The architecture of the anemometer comprises a laser source (12) a reception/transmission optics (20, 22, 24, 26) for focusing a laser on a measuring zone containing particles suspended in the ambient milieu and for receiving a radiation backscattered by the particles. It further comprises an optical mixer (30) for mixing the received radiation and a reference radiation representing the radiation emitted by the source, and a sensor (64) in the output of the mixer. The relative speed between the anemometer and the ambient milieu is determined by calculation based on the Doppler effect generated by the radiation and detected by the sensor. The laser source (12) is offset relative to a common support which bears the optical transmission and reception system as well as the mixer. It is connected to said common support by at least an optical fibre (54). The main transmission path (22, 26,24, 20) of the transmission and reception system borne by the support is produced with a non-guided optics. The invention is useful for measuring speed relative to ambient air of an aircraft wherein the anemometer is integrated.</p> |
