DEVICE AND METHOD FOR DETERMINING THE PRESENCE OF DAMAGE OR DIRT IN A DOPPLER LASER ANEMOMETRY PROBE PORTHOLE

摘要

A device for determining the presence of damage or dirt on a Doppler laser anemometry probe (2) porthole (1) comprising means (6) for implementing a continuous angular scan of the laser beam, means (7) for determining a current spectral component of the output signal of the probe (2) corresponding to a parasitic signal due to parasitic reflections on the path common to the emitted wave and the wave backscattered by the medium during spectral analysis of the anemometric signal, and means (8) for comparing said current spectral component of the current parasitic signal with a reference spectral component of the reference parasitic signal.

主权项

1. A device for determining the presence of damage or dirt on a Doppler laser anemometry probe (2) porthole (1) comprising means (6) for implementing a continuous angular scan of the laser beam, means (7) for determining a current spectral component of the output signal of the probe (2) corresponding to a parasitic signal due to parasitic reflections on the path common to the emitted wave and the wave backscattered by the medium during spectral analysis of the anemometric signal, and means (8) for comparing said current spectral component of the current parasitic signal with a reference spectral component of the reference parasitic signal.