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1. (WO2018002740) APPARATUS AND METHOD FOR MEASURING AIR FLOW
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Pub. No.: WO/2018/002740 International Application No.: PCT/IB2017/052953
Publication Date: 04.01.2018 International Filing Date: 19.05.2017
IPC:
G01F 1/66 (2006.01) ,G01F 15/04 (2006.01) ,G01F 25/00 (2006.01)
G PHYSICS
01
MEASURING; TESTING
F
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66
by measuring frequency, phase shift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
G PHYSICS
01
MEASURING; TESTING
F
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
15
Details of, or accessories for, apparatus of groups G01F1/-G01F13/104
02
Compensating or correcting for variations in pressure, density, or temperature
04
of gases to be measured
G PHYSICS
01
MEASURING; TESTING
F
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
25
Testing or calibrating of apparatus for measuring volume, volume flow, or liquid level, or for metering by volume
Applicants: FLÄKTGROUP SWEDEN AB[SE/SE]; Fläktgatan 1, SE
Inventors: HOKKANEN, Jari; FI
MIKKONEN, Jari; FI
SILLANPÄÄ, Teuvo; FI
Agent: HEINÄNEN OY; Äyritie 8 D FI-01510 VANTAA, FI
Priority Data:
2016552927.06.2016FI
Title (EN) APPARATUS AND METHOD FOR MEASURING AIR FLOW
(FR) APPAREIL ET PROCÉDÉ POUR MESURER UN FLUX D'AIR
Abstract:
(EN) (Apparatus and method for measuring air flow in a duct, e.g. in a ventilation duct (300). The apparatus comprises a sensor fittable into connection with the duct at a certain distance from an interference source, the sensor comprising an ultrasound transmitter (100) and at least two ultrasound receivers (102, 104), and a control unit (304) to which the ultrasound transmitter and ultrasound receivers are connectable. The control unit is adapted to measure the phase difference of the ultrasound signal received at the same moment in time by at least two ultrasound receivers (102, 104) fitted into connection with the duct and, based on the measured phase difference, to determine the flow velocity and/or flow direction of the air. The control unit is adapted to compensate the determined flow velocity and/or flow direction of the air with a coefficient that is formed on the basis of the diameter of the duct, the type of interference source and the distance between the sensor and the interference source.
(FR) La présente invention concerne un appareil et un procédé permettant de mesurer un flux d'air dans un conduit, par exemple dans un conduit de ventilation (300). L'appareil comprend un capteur pouvant être fixé au conduit à une certaine distance d'une source d'interférence, le capteur comprenant un émetteur d'ultrasons (100) et au moins deux récepteurs d'ultrasons (102, 104), et une unité de commande (304) à laquelle l'émetteur d'ultrasons et les récepteurs d'ultrasons peuvent être connectés. L'unité de commande est conçue pour mesurer la différence de phase du signal ultrasonore reçu au même moment par au moins deux récepteurs d'ultrasons (102, 104) fixés au conduit et, sur la base de la différence de phase mesurée, pour déterminer la vitesse et/ou la direction du flux d'air. L'unité de commande est conçue pour compenser la vitesse et/ou la direction déterminées du flux d'air avec un coefficient qui est formé sur la base du diamètre du conduit, du type de la source d'interférence et de la distance entre le capteur et la source d'interférence.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: ???LANGUAGE_SYMBOL_FI??? (FI)