Title :
Laser diode for flow-measurement
Author :
Norgia, M. ; Pesatori, A. ; Donati, S.
Author_Institution :
Dipt. di Elettron., Inf. e Bioingegneria, Politec. di Milano, Milan, Italy
Abstract :
A simple laser diode, without lenses, is demonstrated as a flow sensor. The diode is placed directly on the edge of the duct, exploiting the natural laser divergence. The flow-measurement is based on the Doppler shift induced by the scattering particles inside the fluid, read by the self-mixing effect inside the laser diode. The proposed approach was modeled by a numerical simulation, in order to find the best signal processing algorithm. Finally, a set of measurements have confirmed the sensor performances as flow-meter.
Keywords :
Doppler shift; flow measurement; flow sensors; flowmeters; light interferometry; numerical analysis; semiconductor lasers; Doppler shift; flow sensor; flow-measurement; flow-meter; laser diode; numerical simulation; self-mixing effect; signal processing algorithm; Atmospheric measurements; Diode lasers; Ducts; Measurement by laser beam; Optical interferometry; Optical sensors; Semiconductor lasers; Fluid flow measurement; Laser velocimetry; Optical interferometry; Optical sensors; Optoelectronic and photonic sensors;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2015 IEEE International
Conference_Location :
Pisa
DOI :
10.1109/I2MTC.2015.7151478
