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1. WO1979001119 - PEAK TRACKING CORRELATOR

Publication Number WO/1979/001119
Publication Date 27.12.1979
International Application No. PCT/GB1979/000076
International Filing Date 24.05.1979
IPC
G01F 1/712 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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
708Measuring the time taken to traverse a fixed distance
712using auto-correlation or cross-correlation detection means
G06F 17/15 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
17Digital computing or data processing equipment or methods, specially adapted for specific functions
10Complex mathematical operations
15Correlation function computation
G06G 7/19 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
GANALOGUE COMPUTERS
7Devices in which the computing operation is performed by varying electric or magnetic quantities
12Arrangements for performing computing operations, e.g. amplifiers specially adapted therefor
19for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
CPC
G01F 1/712
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
704using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
708Measuring the time taken to traverse a fixed distance
712using auto-correlation or cross-correlation detection means
G06F 17/15
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
17Digital computing or data processing equipment or methods, specially adapted for specific functions
10Complex mathematical operations
15Correlation function computation ; including computation of convolution operations
G06G 7/1935
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
GANALOGUE COMPUTERS
7Devices in which the computing operation is performed by varying electric or magnetic quantities
12Arrangements for performing computing operations, e.g. operational amplifiers
19for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
1928for forming correlation integrals; for forming convolution integrals
1935by converting at least one the input signals into a two level signal, e.g. polarity correlators
Applicants
Inventors
Priority Data
22800/7825.05.1978GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PEAK TRACKING CORRELATOR
(FR) CORRELATEUR DE DETECTION DE SOMMET
Abstract
(EN)
Apparatus for tracking the peak of a correlation function between two signals (x(t),y(t)) includes a coarse peak detector (26) for providing a coarse measure of the peak position and a tracking correlator for providing a fine indication of the peak once its tracking range has been set by the coarse detector. The preferred tracking correlator includes a word controlled shift register (25) whose length is controlled by a signal (Np) from the coarse detector (26) thereby setting the tracking range. A delay-lock-loop including a multiplier (16), smoothing circuit (18), integrator (19) and voltage controlled oscillator (20) achieves a stable state when the clock frequency (Fc) of the register (25) produces a null at the input to the integrator (19). A preferred use of the apparatus is as a flowmeter.
(FR)
Un appareil de detection du sommet d"une fonction de correlation entre deux signaux (x (t), y (t)) comprend un detecteur primaire de sommet (26) qui produit une mesure grossiere de la position du sommet ou crete et un correlateur de detection pour donner une indication sensible du sommet une fois sa zone de detection determinee par le detecteur primaire. Le correlateur de detection prefere comprend un registre a decalage a commande de mot (25) dont la longueur est commandee par un signal (Np) emis par le detecteur primaire (26) etablissant ainsi la zone de detection. Une boucle de verrouillage-temporisation, comprenant un multiplicateur (16), un circuit de lissage (18), un integrateur (19) et un oscillateur commande par tension (20), etablit un etat stable lorsque la frequence de base (Fc) du registre (25) produit une valeur nulle a l"entree de l"integrateur (19). L"appareil peut etre utilise, de preference, comme debitmetre.
Also published as
DE2952812
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