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.
Liquid Level Measurement System based on a Coherent Optical Sensor
MELCHIONNI, DARIO;PESATORI, ALESSANDRO;NORGIA, MICHELE
2014-01-01
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.File in questo prodotto:
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