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1. WO1998014761 - METHOD AND APPARATUS FOR DETECTING AND ALIGNING A SIGNAL

Publication Number WO/1998/014761
Publication Date 09.04.1998
International Application No. PCT/US1997/008007
International Filing Date 09.05.1997
IPC
G01F 1/66 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66by measuring frequency, phase shift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
G01P 5/24 2006.01
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
24by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
CPC
G01F 1/667
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66by measuring frequency, phaseshift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
667Schematic arrangements of transducers of ultrasonic flowmeters; Circuits therefor
G01P 5/248
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
24by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
245by measuring transit time of acoustical waves
248by measuring phase differences
Applicants
  • DIETERICH TECHNOLOGY HOLDING CORP. [US]/[US]
Inventors
  • BROWN, Alvin, E.
Agents
  • HANES, Richard, W.
Priority Data
08/720,79004.10.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR DETECTING AND ALIGNING A SIGNAL
(FR) PROCEDE ET APPAREIL POUR LA DETECTION ET L'ALIGNEMENT D'UN SIGNAL
Abstract
(EN)
A method of detecting and aligning a signal in an ultrasonic flow meter (18) generates an oscillator signal (50) and a transmit sequence (54) on a first predetermined trigger point (55) of the oscillator signal (50). The transmit sequence (54) is used to drive a transmit transducer (14, 16) to form a transmit waveform (60). The transmit waveform (60) is received by a receive transducer (14, 16) to form a received waveform. The received waveform is processed to form a received sequence (62). The received sequence (62) is then processed to sense an anomaly (80).
(FR)
Ce procédé, qui sert à détecter et à aligner un signal dans un débitmètre à ultrasons (18) génère un signal d'oscillateur (50) et une séquence de transmission (54) en un premier point de déclenchement prédéterminé (55) du signal d'oscillateur (50). La séquence de transmission (54) est utilisée pour exciter un transducteur de transmission (14, 16), afin de produire une forme d'onde de transmission (60). La forme d'onde de transmission (60) est reçue par un transducteur de réception (14, 16), afin de produire une forme d'onde reçue. La forme d'onde reçue est traitée pour produire une séquence reçue (52). La séquence reçue (62) est ensuite traitée pour permettre la détection d'une anomalie (80).
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