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1. US20200003687 - Device and method for measuring the spatial distribution of the concentration of compounds and mixtures thereof in a fluid and/or the level in a fluid

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United States of America
Application Number 16481069
Application Date 24.01.2018
Publication Number 20200003687
Publication Date 02.01.2020
Grant Number 11525780
Grant Date 13.12.2022
Publication Kind B2
IPC
G01N 21/64
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
64Fluorescence; Phosphorescence
G01F 23/292
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
23Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
22by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
28by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
284Electromagnetic waves
292Light
G01N 33/28
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
26Oils; Viscous liquids; Paints; Inks
28Oils
B64D 37/00
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
37Arrangements in connection with fuel supply for power plant
CPC
B64D 37/005
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
37Arrangements in connection with fuel supply for power plant
005Accessories not provided for in the groups B64D37/02 - B64D37/28
G01N 21/6408
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
64Fluorescence; Phosphorescence
6408with measurement of decay time, time resolved fluorescence
G01F 23/292
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
23Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
22by measurement of physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
28by measuring the variations of parameters of electric or acoustic waves applied directly to the liquid or fluent solid material
284Electromagnetic waves
292Light ; , e.g. infra-red or ultra-violet
G01N 21/6402
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
64Fluorescence; Phosphorescence
6402Atomic fluorescence; Laser induced fluorescence
G01N 21/645
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
64Fluorescence; Phosphorescence
645Specially adapted constructive features of fluorimeters
G01N 33/2841
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
26Oils; viscous liquids; paints; inks
28Oils ; , i.e. hydrocarbon liquids
2835specific substances contained in the oil or fuel
2841gas in oil, e.g. hydrogen in insulating oil
Applicants INSTITUTO SUPERIOR TÉCNICO
Inventors Mário Nuno De Matos Sequeira Berberan E Santos
Liliana Marques Martelo
Agents Mark M. Friedman
Priority Data 109877 26.01.2017 PT
Title
(EN) Device and method for measuring the spatial distribution of the concentration of compounds and mixtures thereof in a fluid and/or the level in a fluid
front page image
Abstract
(EN)

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.
Related patent documents
PT109877
CN110234983
EP3623799
WO/2018/138649
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