Velocity Measurement in a Fluid Using {LDV}: Low-Cost Sensor and Signal Processing Design

Alain Le Duff (1, 2) , Guy Plantier (1, 2) , Jean-Christophe Valière (3) , Thierry Bosch (1)

1 GSII - ESEO-GSII
2 LAUM - Laboratoire d'Acoustique de l'Université du Mans
3 ENSEEIHT - Ecole Nationale Supérieure d'Electrotechnique, d'Electronique, d'Informatique, d'Hydraulique et de Télécommunications

Laser Doppler Velocimetry (LDV) has been widely used for many years in fluid mechanics to measure particle velocity. However in most applications, in industrial processes for example, such a system is often too expensive. This paper discusses a technique based on the use of an analog phased-locked loop and an analog integrator system for processing LDV data to infer particle velocity. This method appears to be suitable for designing low-cost integrated LDV sensors. A SIMULINK/sup /spl reg// program has been written in order to validate the method for velocities in the 10 mm/s to 80 mm/s range. Finally, the performance of the estimator is illustrated by Monte-Carlo simulations obtained from a synthesized Doppler signal.

Domaines: Traitement du signal et de l'image [eess.SP]

Alain Le Duff, Guy Plantier, Jean-Christophe Valière, Thierry Bosch. Velocity Measurement in a Fluid Using {LDV}: Low-Cost Sensor and Signal Processing Design. 2002 IEEE Sensors Conference, Jun 2002, Orlando, United States. pp.1347--1350, ⟨10.1109/ICSENS.2002.1037315⟩. ⟨hal-01206855⟩