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1. IN835/CHENP/2012 - A SYSTEM AND METHOD FOR MEASURING A RESONANCE FREQUENCY OF A TUBE

Office India
Application Number 835/CHENP/2012
Application Date 24.01.2012
Publication Number 835/CHENP/2012
Publication Date 28.06.2013
Publication Kind A
IPC
G01H 13/00
GPHYSICS
01MEASURING; TESTING
HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
13Measuring resonant frequency
Applicants KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors BRAND  Maarten  Leonardus  Christian
DONG  Liang
DU  Juan
Priority Data 200910160418.8 16.07.2009 CN
Title
(EN) A SYSTEM AND METHOD FOR MEASURING A RESONANCE FREQUENCY OF A TUBE
Abstract
(EN)
The invention proposes a system for measuring a resonance frequency of a tube. The system comprises: - an oscillating unit (21) for oscillating the tube at a plurality of oscillation 5 frequencies, respectively; - a detecting unit (22) for detecting a time delay of transmitting a pressure pulse from a first position to a second position in the tube when the tube is oscillated at each oscillation frequency, wherein, when the tube is oscillated at each oscillation frequency in a specific oscillation frequency range of the plurality of oscillation frequencies, the detecting unit (22) 10 detects a variation of the time delay - a determining unit (23) for determining a maximal variation of the time delay when the tube is oscillated at the oscillation frequencies in the specific oscillation frequency range; and 15 - an indicating unit (24) for indicating an oscillation frequency corresponding to the maximal variation of the time delay, being a resonance frequency of the tube. Fig.2

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