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1. CA2059691 - DISPOSITIF DE MESURE DE L'EFFET DE CORIOLIS FAISANT APPEL A DES CAPTEURS A FIBRES OPTIQUES

Office
Canada
Numéro de la demande 2059691
Date de la demande 20.01.1992
Numéro de publication 2059691
Date de publication 24.06.1993
Numéro de délivrance
Date de délivrance 13.05.1997
Type de publication C
CIB
G01N 21/85
GPHYSIQUE
01MÉTROLOGIE; TESTS
NRECHERCHE OU ANALYSE DES MATÉRIAUX PAR DÉTERMINATION DE LEURS PROPRIÉTÉS CHIMIQUES OU PHYSIQUES
21Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c. à d. en utilisant des rayons infrarouges, visibles ou ultraviolets
84Systèmes spécialement adaptés à des applications particulières
85Analyse des fluides ou solides granulés en mouvement
G01F 1/84
GPHYSIQUE
01MÉTROLOGIE; TESTS
FMESURE DES VOLUMES, DES DÉBITS VOLUMÉTRIQUES, DES DÉBITS MASSIQUES OU DU NIVEAU DES LIQUIDES; COMPTAGE VOLUMÉTRIQUE
1Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers le compteur par un écoulement continu
76Dispositifs pour mesurer le débit massique d'un fluide ou d'un matériau solide fluent
78Débitmètres massiques directs
80fonctionnant en mesurant la pression, la force, le couple ou la fréquence d'un courant de fluide auquel a été donné un mouvement de rotation
84Débitmètres massiques du type Coriolis ou gyroscopique
CPC
G01F 1/8413
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8413means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
G01F 1/8427
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8427detectors
G01F 1/8431
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
8409constructional details
8431electronic circuits
G01F 1/8477
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
76Devices for measuring mass flow of a fluid or a fluent solid material
78Direct mass flowmeters
80operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
84Gyroscopic mass flowmeters
845arrangements of measuring means, e.g., of measuring conduits
8468vibrating measuring conduits
8472having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
8477with multiple measuring conduits
G01F 15/024
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
15Details of, or accessories for, apparatus of the preceding groups insofar as such details or appliances are not adapted to particular types of such apparatus
02Compensating or correcting for variations in pressure, density or temperature
022using electrical means
024involving digital counting
Inventeurs KALOTAY, PAUL ZOLTAN
Données relatives à la priorité 07809146 23.12.1991 US
Titre
(EN) CORIOLIS EFFECT METER USING OPTICAL FIBER SENSORS
(FR) DISPOSITIF DE MESURE DE L'EFFET DE CORIOLIS FAISANT APPEL A DES CAPTEURS A FIBRES OPTIQUES
Abrégé
(EN) A Coriolis mass flow rate meter for measuring the mass flow rate of material flowing through a conduit. The flow meter includes at least one flow tube (12 and 14) through which the material to be measured passes. The flow tube is vibrated at its natural frequency so that the concurrent flow of material through the vibrating tube produces a displacement of the tube with the magnitude of the displacement being dependent upon the magnitude of the generated Coriolis forces and the mass flow rate of the measured material. The phase of the displacement of the flow tube is measured using optical fiber sensors (170L and 170R) comprising at least one loop of optical fiber which is flexed by the displacement of the flow tube. This flexing of the fiber causes a corresponding change in its optical conductivity and a corresponding change in the intensity of the light transmitted through the fiber from a light signal source (160) to a signal detector (192L and 192R). The modulated light signal received by the optical signal detector is converted to an electrical signal which is processed to generate the mass flow rate and other information for the flowing material. A feedback circuit (201) for the light signal source monitors the average intensity of the light received by the signal detector and controls the drive signal (202) applied to the light source to maintain the average intensity of the light signal received by the detector at a predetermined initial intensity.