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1. (EP3112819) MINIATURE DIFFERENTIAL PRESSURE FLOW SENSOR

Office : European Patent Office
Application Number: 15306054 Application Date: 30.06.2015
Publication Number: 3112819 Publication Date: 04.01.2017
Publication Kind : A1
Designated States: AL, AT, BA, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
IPC:
G01F 1/38
G01F 1/46
G01P 5/165
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
34
by measuring pressure or differential pressure
36
the pressure or differential pressure being created by the use of flow constriction
38
the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
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
34
by measuring pressure or differential pressure
36
the pressure or differential pressure being created by the use of flow constriction
40
Details of construction of the flow constriction devices
46
Pitot tubes
G PHYSICS
01
MEASURING; TESTING
P
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
5
Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
14
by measuring differences of pressure in the fluid
16
using Pitot tubes
165
Arrangements or constructions of Pitot tubes
CPC:
G01F 1/383
G01F 1/46
G01P 5/165
Applicants: COMMISSARIAT ENERGIE ATOMIQUE
Inventors: MOUKHARSKI IOURI
BRASLAU ALAN
Priority Data: 15306054 30.06.2015 EP
Title: (DE) MINIATURISIERTER DIFFERENZDRUCK-DURCHFLUSSSENSOR
(EN) MINIATURE DIFFERENTIAL PRESSURE FLOW SENSOR
(FR) DÉBITMÈTRE MINIATURE À PRESSION DIFFÉRENTIELLE
Abstract: front page image
(EN) The invention relates to a fluid flow velocity sensor using a differential pressure measurement and comprising a stack (200) having a tip (230) pointing in a first direction, said stack comprising first and second plates (210A-210B) arranged in parallel one another along the first direction; and a pressure-sensitive diaphragm (220) arranged between the first and second plates (210A-210B) along the first direction, said pressure-sensitive diaphragm (220) being spaced apart from the first plate (210A) by a first cavity and from the second plate (210B) by a second cavity, wherein the first cavity is entirely sealed, except at the tip (230) of the stack, so as to be under a stagnation pressure during operation of the fluid flow velocity sensor, and wherein the second cavity is opened so as to be under a reference pressure during operation of the fluid flow velocity sensor. The fluid flow velocity sensor further comprises a detector configured to measure a parameter representative of the differential pressure between the first and the second cavities.