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1. WO2004018974 - DEVICE FOR MONITORING A PREDETERMINED FILLING LEVEL OF A MEASURING MEDIUM IN A CONTAINER

Publication Number WO/2004/018974
Publication Date 04.03.2004
International Application No. PCT/EP2003/007841
International Filing Date 18.07.2003
IPC
G01F 23/296 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
23Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
22by measurement of physical variables, other than linear dimensions, pressure, or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
28by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
296Acoustic waves
G01N 9/00 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
9Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
G01N 11/16 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
11Investigating flow properties of materials, e.g. viscosity or plasticity; Analysing materials by determining flow properties
10by moving a body within the material
16by measuring damping effect upon oscillatory body
CPC
G01F 23/2967
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
23Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
22by measurement of physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
28by measuring the variations of parameters of electric or acoustic waves applied directly to the liquid or fluent solid material
296Acoustic waves
2966making use of acoustical resonance or standing waves
2967for discrete levels
G01N 11/16
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
11Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
10by moving a body within the material
16by measuring damping effect upon oscillatory body
G01N 9/002
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
9Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
002using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
Applicants
  • ENDRESS + HAUSER GMBH + CO. KG [DE]/[DE] (AllExceptUS)
  • MÜLLER, Alexander [DE]/[DE] (UsOnly)
  • D'ANGELICO, Sascha [DE]/[DE] (UsOnly)
Inventors
  • MÜLLER, Alexander
  • D'ANGELICO, Sascha
Agents
  • ANDRES, Angelika
Priority Data
102 37 931.914.08.2002DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VORRICHTUNG ZUR ÜBERWACHUNG EINES VORBESTIMMTEN FÜLLSTANDS EINES MESSMEDIUMS IN EINEM BEHÄLTER
(EN) DEVICE FOR MONITORING A PREDETERMINED FILLING LEVEL OF A MEASURING MEDIUM IN A CONTAINER
(FR) DISPOSITIF POUR SURVEILLER UN ETAT DE REMPLISSAGE PREDEFINI D'UN MILIEU A MESURER DANS UN RECIPIENT
Abstract
(DE)
Die Erfindung bezieht sich auf einen Vibrationsdetektor für die Bestimmung und/oder Überwachung eines vorbestimmten Füllstands in einem Behälter mit einer schwingfähigen Einheit (2), einer Antriebs-/Empfangseinheit (6) und einer Auswerteeinheit (8). Der Vibrationsdetektor kann weiterhin als Viskositätssensor oder als Dichtesensor eingesetzt werden. Um einen multivariablen Sensor bereitzustellen, ist dass in dem Schwingkreis (7), gebildet aus schwingfähiger Einheit (2) und Rückkoppelelektronik (9), ein Mikroprozessor (8) vorgesehen ist, wobei der Mikroprozessor (8) über eine vorgegebene Frequenz-Bandbreite die Phase der Rückkoppelelektronik (9) derart korrigiert, dass die Summe der Phasen der Rückkoppelelektronik (9) und des Mikroprozessors (8) einer vorgegebenen Funktion f(v) folgt.
(EN)
The invention relates to a vibration detector for determining and/or monitoring a predefined filling level in a container. Said vibration detector comprises an oscillating unit (2), a drive/receiver unit (6), and an evaluation unit (8). The inventive vibration detector can also be used as a viscosity sensor or density sensor. In order to create a multivariable sensor, the oscillating circuit (7) that is formed by the oscillating unit (2) and an electronic feedback device (9) is provided with a microprocessor which corrects the phase of the electronic feedback device (9) across a given frequency bandwidth such that the sum of the phases of the electronic feedback device (9) and the microprocessor (8) follows a predefined function f(n).
(FR)
La présente invention concerne un détecteur de vibrations conçu pour déterminer et/ou surveiller un état de remplissage prédéfini dans un récipient. Ce détecteur comprend une unité oscillante (2), une unité de commande/réception (6) et une unité d'analyse (8). Ledit détecteur de vibrations peut également être utilisé en tant que capteur de viscosité ou capteur de densité. Afin de mettre au point un capteur multivariable, un microprocesseur (8) est intégré dans le circuit oscillant qui est composé de l'unité oscillante (2) et d'un système électronique de rétroaction (9). Ce microprocesseur (8) corrige la phase du système électronique de rétroaction (9) sur une largeur de bande de fréquence prédéfinie, de façon que la somme des phases du système électronique de rétroaction (9) et du microprocesseur (8) suive une fonction prédéfinie f($g(n)).
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