Tesis doctoral de Ramon Casanella Alonso
Liquid level sensing, including the detection of both liquid height and the thickness of layers of liquids with dissimilar properties (interface level sensing), is a wide classical area in sensor design where a variety of solutions have been developed that rely on quite different working principles. Some of these solutions often involve using mobile parts, modifying vessel structures or opening extra outlets in the system. Alternative solutions based on measuring wave propagation times, though overcoming most of those drawbacks, have their own limitations, mainly signal attenuation in conductive media and the need of measuring additional electrical parameters when applied to two-phase media, such as oil and water. Furthermore, several interesting applications in areas such as environmental monitoring, which require the detection of the interface between two liquid conductive layers, are not satisfactorily covered by existing technologies. Another capital drawback of most current level sensing technologies is the need of performing very expensive field calibrations prior to sensor operation or during the sensor life in order to meet acceptable accuracy levels. the main goal of this thesis is to design a system to measure liquid level and interface level based on an array of electrodes as sensing element. This should provide a low cost, robust sensing method that, by combining the information of the electrodes in the array, will yield a higher accuracy than that provided by alternative sensor technologies or by a series of point conductivity sensors. Furthermore, there will be no need of performing any prior field calibration procedure. to develop the proposed system it is necessary to tackle two basic problems: 1) modeling the relationship between the desired liquid level parameters and the data from the electrode array, and 2) designing an experimental set-up to perform the required measurements and calculate the desired level parameters. The calculation capabilit
Datos académicos de la tesis doctoral «Liquid interface level sensing using electrode arrays«
- Título de la tesis: Liquid interface level sensing using electrode arrays
- Autor: Ramon Casanella Alonso
- Universidad: Politécnica de catalunya
- Fecha de lectura de la tesis: 05/12/2007
Dirección y tribunal
- Director de la tesis
- Ramón PallÁ s Areny
- Tribunal
- Presidente del tribunal: c.m. Meijer gerard
- alfonso Carlosena (vocal)
- vittorio Ferrari (vocal)
- j. Peyton anthony (vocal)