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1. WO2020064731 - METHOD AND DEVICE FOR MEASURING A FLOW VELOCITY OF A GAS STREAM

Publication Number WO/2020/064731
Publication Date 02.04.2020
International Application No. PCT/EP2019/075710
International Filing Date 24.09.2019
IPC
G01F 1/704 2006.01
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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
G01F 1/708 2006.01
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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
708Measuring the time taken to traverse a fixed distance
CPC
G01F 1/704
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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
G01F 1/7044
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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
7044using thermal tracers
G01F 1/7086
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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
708Measuring the time taken to traverse a fixed distance
7086using optical detecting arrangements
G01P 5/22
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
18by measuring the time taken to traverse a fixed distance
22using auto-correlation or cross-correlation detection means
G01P 5/26
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
26by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
Applicants
  • PROMECON PROCESS MEASUREMENT CONTROL GMBH [DE]/[DE]
Inventors
  • CONRADS, Hans-Georg
Agents
  • GRAMM, LINS & PARTNER PATENT- UND RECHTSANWÄLTE PARTGMBB
Priority Data
10 2018 123 448.124.09.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN UND VORRICHTUNG ZUM MESSEN EINER STROEMUNGSGESCHWINDIGKEIT EINES GASSTROMS
(EN) METHOD AND DEVICE FOR MEASURING A FLOW VELOCITY OF A GAS STREAM
(FR) PROCÉDÉ ET DISPOSITIF DE MESURE D'UNE VITESSE D'ÉCOULEMENT D'UN FLUX DE GAZ
Abstract
(DE)
Die Erfindung betrifft ein Verfahren zum Messen einer Strömungsgeschwindigkeit (v) eines Gasstroms (14), mit den Schritten: (a) zeitaufgelöstes Messen eines IR-Strah- lungsparameters (E) von IR-Strahlung des Gasstroms (14) an einer ersten Mess- stelle (P1) außerhalb des Gasstroms (14), sodass ein erster IR-Strahlungsparame- terverlauf (Eg1,1(t)) erhalten wird, (b) zeitaufgelöstes Messen des IR-Strahlungspara- meters (E) an einer zweiten Messstelle (P2) außerhalb des Gasstroms (14), sodass ein zweiter IR-Strahlungsparameterverlauf (Eg1,2(t)) erhalten wird, (c) Berechnen ei- ner Laufzeit (τ1) aus dem ersten IR-Strahlungsparameterverlauf (Eg1,1(t)) und dem zweiten IR-Strahlungsparameterverlauf (Eg1,2(t)), insbesondere mittels Kreuzkorrela- tion, und (d) Berechnen der Strömungsgeschwindigkeit (vG) aus der Laufzeit (τ1), (e) wobei der IR-Strahlungsparameter (Eg1) bei einer Wellenlänge (g1) von zumin- dest 780 nm photoelektrisch gemessen wird und (f) eine Messfrequenz (f) zumindest 1 Kilohertz beträgt.
(EN)
The invention relates to a method for measuring a flow velocity (v) of a gas stream (14), comprising the steps of: (a) time-resolved measuring of an IR radiation parameter (E) of IR radiation of the gas stream (14) to a first measurement point (P1) outside the gas stream (14), such that a first IR radiation parameter curve (Eg1,1(t)) is obtained, (b) time-resolved measuring of an IR radiation parameter (E) at a second measurement point (P2) outside the gas stream (14), such that a second IR radiation parameter curve (Eg1,2(t)) is obtained, (c) calculating a transit time (τ1) from the first IR radiation parameter curve (Eg1,1(t)) and the second IR radiation parameter curve (Eg1,2(t)), in particular by means of cross-correlation, and (d) calculating the flow velocity (vG) from the transit time (τ1), (e) the IR radiation parameter (Eg1) being measured photoelectrically at a wavelength (g1) of at least 780 nm and (f) a measurement frequency (f) amounting to at least 1 kilohertz.
(FR)
L'invention concerne un procédé pour mesurer une vitesse d'écoulement (v) d'un flux de gaz (14), comprenant les étapes : (a) de mesure par résolution temporelle d'un paramètre de rayonnement infrarouge (E) d'un rayonnement infrarouge du flux de gaz (14) en un premier point de mesure (P1) à l'extérieur du flux de gaz (14), de sorte qu'une première variation de paramètre de rayonnement infrarouge (Eg1,1(t)) est obtenue, (b) de mesure par résolution temporelle du paramètre de rayonnement infrarouge (E) en un deuxième point de mesure (P2) à l'extérieur du flux de gaz (14), de sorte qu'une deuxième variation de paramètre de rayonnement infrarouge (Eg1,2(t)) est obtenue, (c) de calcul d'un temps de propagation (τ1) à partir de la première variation de paramètre de rayonnement infrarouge (Eg1,1(t)) et de la deuxième variation de paramètre de rayonnement infrarouge (Eg1,2(t)), en particulier au moyen d'une corrélation croisée, et (d) de calcul de la vitesse d'écoulement (vG) à partir du temps de propagation (τ1), (e) le paramètre de rayonnement infrarouge (Eg1) étant mesuré de manière photoélectrique pour une longueur d'onde (g1) d'au moins 780 nm et (f) une fréquence de mesure (f) atteignant au moins 1 kilohertz.
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