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1. WO2016139051 - VIBRONIC SENSOR HAVING A CONTROL ELEMENT

Publication Number WO/2016/139051
Publication Date 09.09.2016
International Application No. PCT/EP2016/053090
International Filing Date 15.02.2016
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 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
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
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
G01F 23/2968
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
2968Transducers specially adapted for acoustic level indicators
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 2009/006
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
006vibrating tube, tuning fork
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]
Inventors
  • KUHNEN, Raphael
  • IBRAHIM, Mohd Syafiq Affendi
  • FRÜHAUF, Dietmar
Agents
  • ANDRES, Angelika
Priority Data
10 2015 103 071.303.03.2015DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VIBRONISCHER SENSOR MIT EINEM STELLELEMENT
(EN) VIBRONIC SENSOR HAVING A CONTROL ELEMENT
(FR) CAPTEUR VIBRONIQUE PRÉSENTANT UN ÉLÉMENT DE RÉGLAGE
Abstract
(DE)
Vibronischer Sensor (1) zur Überwachung einer Prozessgröße eines Mediums (2) in einem Behältnis (3) zumindest umfassend eine mechanisch schwingfähige Einheit (4), eine Antriebs-/Empfangseinheit (5) und eine Elektronikeinheit (6), wobei die mechanisch schwingfähige Einheit (4) zwei Schwingstäbe (7,8) und ein mit zumindest einem der Schwingstäbe (7,8) mechanisch verbundenes, in der Steifigkeit veränderliches Stellelement (13) aufweist, wobei wenigstens ein erster, äußerer Schwingstab (7) rohrförmig ist und einen zweiten, inneren Schwingstab (8) koaxial umschließt, wobei jeder der beiden Schwingstäbe (7,8) derart an einem gemeinsamen Träger (9) befestigt ist, dass er Schwingungen quer zu seiner Längsrichtung ausführen kann, wobei die Antriebs-/Empfangseinheit (5) dazu ausgestaltet ist, anhand eines elektrischen Anregesignals (Ua) die beiden Schwingstäbe (7,8) zu gegensinnigen, transversalen, mechanischen, resonanten Schwingungen anzuregen, und die Schwingungen der mechanisch schwingfähigen Einheit (4) zu empfangen und in ein elektrisches Empfangssignal (Ue) umzuwandeln, wobei die Elektronikeinheit (6) dazu ausgestaltet ist, die Steifigkeit des Stellelements (13) einzustellen und zumindest aus dem elektrischen Empfangssignal (Ue) die zumindest eine Prozessgröße zu ermitteln, und wobei das Stellelement (13) zumindest eine Komponente (15) aus einem Material umfasst, welches einen Giant-Delta-E-Effekt aufweist.
(EN)
The invention relates to a vibronic sensor (1) for monitoring a process variable of a medium (2) in a container (3), at least comprising a unit (4) that can vibrate mechanically, a driving/receiving unit (5), and an electronic unit (6), wherein the unit (4) that can vibrate mechanically has two vibration bars (7, 8) and a control element (13), which is mechanically connected to at least one of the vibration bars (7, 8) and the stiffness of which can be varied, wherein at least one first, outer vibration bar (7) is tubular and coaxially surrounds a second, inner vibration bar (8), wherein each of the two vibration bars (7, 8) is fastened to a common support (9) in such a way that the vibration bar can perform vibrations transversely to the longitudinal direction of the vibration bar, wherein the driving/receiving unit (5) is designed to excite the two vibration bars (7, 8) to oppositely directed, transverse, mechanical, resonant vibrations by means of an electrical excitation signal (Ua) and to receive the vibrations of the unit (4) that can vibrate mechanically and to convert said vibrations into an electrical reception signal (Ue), wherein the electronic unit (6) is designed to set the stiffness of the control element (13) and to determine the at least one process variable at least from the electrical reception signal (Ue), and wherein the control element (13) comprises at least one component (15) composed of a material that has a giant delta-E effect.
(FR)
L'invention concerne un capteur vibronique (1) pour surveiller une grandeur de procédé d'un milieu (2) dans un récipient (3), comprenant au moins une unité (4) pouvant vibrer mécaniquement, une unité d'entraînement/réception (5) et une unité électronique (6). L'unité (4) pouvant vibrer mécaniquement présente deux tiges vibrantes (7,8) et un élément réglable (13), dont la rigidité est modifiable, relié mécaniquement à au moins l'une des tiges vibrantes (7,8), au moins une première tige vibrante (7) externe étant tubulaire et entourant une deuxième tige vibrante (8) interne de manière coaxiale, chacune des deux tiges vibrantes (7,8) étant fixée à un support commun (9) de manière telle qu'elle peut effectuer des vibrations transversales par rapport à sa direction longitudinale. L'unité d'entraînement/réception (5) est conçue pour entraîner, à l'aide d'un signal d'excitation électrique (Ua), les deux tiges vibrantes (7,8) en vibrations opposées, transversales, mécaniques, résonantes et pour recevoir les vibrations de l'unité (4) pouvant vibrer mécaniquement et les transformer en un signal de réception électrique (Ue). L'unité électronique (6) est conçue pour régler la rigidité de l'élément de réglage (13) et pour déterminer, au moins à partir du signal de réception électrique (Ue), ladite au moins une grandeur de procédé et l'élément de réglage (13) comprend au moins un élément (15) en un matériau qui présente un effet delta E géant.
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