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1. US20100071477 - Flow velocity and pressure measurement using a vibrating cantilever device

Office
United States of America
Application Number 12527346
Application Date 31.01.2008
Publication Number 20100071477
Publication Date 25.03.2010
Grant Number 08371184
Grant Date 12.02.2013
Publication Kind B2
IPC
G01H 13/00
GPHYSICS
01MEASURING; TESTING
HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
13Measuring resonant frequency
G01H 3/04
GPHYSICS
01MEASURING; TESTING
HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
3Measuring vibrations by using a detector in a fluid
04Frequency
G01Q 60/38
GPHYSICS
01MEASURING; TESTING
QSCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING-PROBE MICROSCOPY
60Particular types of SPM or apparatus therefor; Essential components thereof
24AFM or apparatus therefor, e.g. AFM probes
38Probes, their manufacture or their related instrumentation, e.g. holders
G01Q 70/02
GPHYSICS
01MEASURING; TESTING
QSCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING-PROBE MICROSCOPY
70General aspects of SPM probes, their manufacture or their related instrumentation, insofar as they are not specially adapted to a single SPM technique covered by group G01Q60/196
02Probe holders
G01F 9/00
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
9Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
Applicants Haehner Georg
The University Court of the University of St. Andrews
Lubarsky Gennady
Inventors Haehner Georg
Lubarsky Gennady
Priority Data 0702965.5 15.02.2007 GB
0709880.9 23.05.2007 GB
Title
(EN) Flow velocity and pressure measurement using a vibrating cantilever device
Abstract
(EN)

Measurement apparatus having a cantilever and a fluid flow channel, the cantilever being positioned in the channel so that it projects in a direction parallel to the direction of fluid flow. In an associated method, the cantilever is positioned in a fluid flow channel such that the cantilever extends parallel with the direction of fluid flow in the channel. Fluid is caused to flow in the channel at a known velocity. The resonant frequency of the cantilever is measured at one or more velocities of fluid flow and calculating the spring constant of the cantilever using the measured resonant frequency or frequencies. If the spring constant of the cantilever is known, the measurement of resonant frequency of the cantilever is used to determine the velocity of the fluid flow.