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AssigneeInstituto Superior Tecnico
InventorsMário Nuno DE MATOS SEQUEIRA BERBERAN E SANTOS, Liliana MARQUES MARTELO
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The invention concerns a method for measuring the concentration of a substance or mixture of substances and/or determining the level in a fluid with intrinsic fluorescence, preferably fuel systems. The invention also refers to the optical device suitable for implementing the method, which comprises a unit which generates light for excitation of the sample; a unit of detection of the signal emitted by the sample and a unit of signal processing. The device and method by which it is implemented also allow the determination of the spatial distribution of the substance or mixture of liquid substances and/or the fluid level in a container. One of the main applications is the measurement of the concentration of oxygen in the fuel tank of aircrafts, based on the measurement of the intrinsic fluorescence of the fuel.
A method for measuring the spatial distribution of the concentration of a substance or mixture of substances in a fluid and/or measuring the level in a fluid, characterized by comprising the following steps:
A method according to any one of the preceding claims, characterized by the substance whose spatial distribution of concentration is to be measured being oxygen.
A method according to the previous claims, characterized by the excitation light source being continuous, modulated or pulsed.
A method according to the preceding claims, characterized by the excitation light being guided to the fuel via an optical fibre or an optical window, among others.
Dependencies are inferred from the claim text.