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1. (WO2018201023) CIRCUMFERENTIAL RESONANCE FLOWMETER
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Pub. No.: WO/2018/201023 International Application No.: PCT/US2018/029907
Publication Date: 01.11.2018 International Filing Date: 27.04.2018
IPC:
G01F 1/66 (2006.01) ,G01F 1/20 (2006.01) ,G01F 1/708 (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
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
05
by using mechanical effects
20
by detection of dynamic effects of the fluid flow
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
704
using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
708
Measuring the time taken to traverse a fixed distance
Applicants:
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY [US/US]; 3000 El Camino Real, Building Five Third Floor Palo Alto, CA 94306, US
Inventors:
FIROUZI, Kamyar; US
KHURI-YAKUB, Butrus, T.; US
Agent:
JACOBS, Ron; US
PARRIS, James; US
LODENKAMPER, Robert; US
MCFARLANE, Thomas; US
Priority Data:
62/491,94128.04.2017US
Title (EN) CIRCUMFERENTIAL RESONANCE FLOWMETER
(FR) DÉBITMÈTRE À RÉSONANCE CIRCONFÉRENTIELLE
Abstract:
(EN) Clamp-on ultrasonic flow metering is provided by collectively exciting and receiving circumferential modes of the pipe. The pipe wall supports an infinite number of circumferential acoustic resonances. Each of these modes, in contact with a fluid, can mode-convert into the flow at a different rate. The mode-converted waves in the flow mode-convert back into the circumferential waves in the pipe once they travel across the flow. Furthermore, the moving fluid alters the rate of mode-conversion as a function of the flow velocity. At low frequencies, the wavelength is larger, thus the penetration depth in the flow is larger. As the frequency increases, the penetration depth becomes smaller. The variable penetration depth provides a methodology to sample the flow velocity profile.
(FR) L'invention concerne une mesure de débit ultrasonore de serrage fourni par l'excitation et la réception collectives de modes circonférentiels du tuyau. La paroi de tuyau soutient un nombre infini de résonances acoustiques circonférentielles. Chacun de ces modes, en contact avec un fluide, peut se convertir en mode dans l'écoulement à un débit différent. Les ondes converties en mode dans l'écoulement se reconvertissent en mode dans les ondes circonférentielles dans le tuyau une fois qu'elles se sont déplacé sur l'écoulement. En outre, le fluide en mouvement modifie la vitesse de conversion en mode en fonction de la vitesse d'écoulement. À basses fréquences, la longueur d'onde est plus grande, ce qui permet à la profondeur de pénétration dans le flux d'être plus grande. Lorsque la fréquence augmente, la profondeur de pénétration diminue. La profondeur de pénétration variable fournit une méthodologie permettant d'échantillonner le profil de vitesse d'écoulement.
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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, JO, 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: English (EN)