Title :
Liquid level measurement system based on a coherent optical sensor
Author :
Melchionni, Dario ; Pesatori, Alessandro ; Norgia, Michele
Author_Institution :
Dipt. di Elettron., Inf. e Bioingegneria, Politec. di Milano, Milan, Italy
Abstract :
A liquid level sensor based on a new optical technique is proposed and demonstrated. By using the wavelength modulation which takes place in the laser diode it´s possible to extract the absolute distance of a target from the induced self-mixed effect. The optical properties of liquid surface have been studied both in static and dynamic conditions, in order to optimize the back-reflected light. This point has determined the guidelines for the optical and electronic project. The prototypal device developed has allowed to measure and track the liquid level during a filling process.
Keywords :
filling; level measurement; optical modulation; optical sensors; semiconductor lasers; absolute target distance extraction; back-reflected light optimization; coherent optical sensor; filling process; laser diode; liquid level measurement system; liquid level sensor; wavelength modulation; Liquids; Measurement by laser beam; Modulation; Optical interferometry; Optical reflection; Optical sensors; Optical surface waves; Level measurements; contactless; optical interferometry; optoelectronic device;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International
Conference_Location :
Montevideo
DOI :
10.1109/I2MTC.2014.6860887
