LU100847B1 - Liquid Level Detection System - Google Patents

Liquid Level Detection System Download PDF

Info

Publication number
LU100847B1
LU100847B1 LU100847A LU100847A LU100847B1 LU 100847 B1 LU100847 B1 LU 100847B1 LU 100847 A LU100847 A LU 100847A LU 100847 A LU100847 A LU 100847A LU 100847 B1 LU100847 B1 LU 100847B1
Authority
LU
Luxembourg
Prior art keywords
heating element
liquid level
liquid
level detection
detection system
Prior art date
Application number
LU100847A
Other languages
English (en)
Inventor
Laurent Lamesch
Michael Olk
Michael Pütz
Martin Thinnes
Original Assignee
Iee Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iee Sa filed Critical Iee Sa
Priority to LU100847A priority Critical patent/LU100847B1/en
Priority to PCT/EP2019/067619 priority patent/WO2020007803A1/en
Application granted granted Critical
Publication of LU100847B1 publication Critical patent/LU100847B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/242—Mounting arrangements for electrodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • G01F23/244—Schematic arrangements of probes combined with measuring circuits comprising oscillating circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
    • G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Claims (15)

P-IEE-500/LU ANSPRÜCHE
1. Flüssigkeitspegel-Erkennungssystem (1) für einen Flüssigkeitstank (2), umfassend: - mindestens ein Heizelement (R,-Rs), das zumindest in der Nahe eines inneren Hohlraums (2.2) des Flüssigkeitstanks (2) angeordnet ist, und - eine Messvorrichtung (10), die dafür ausgelegt ist: * ein zeitabhängiges elektrisches Signal an jedes Heizelement (R4- Rs) anzulegen, um das Heizelement (R4-Rs) zu erwärmen, - für jedes Heizelement (R4-Rs) eine Größe zu erkennen, die von einer Temperatur des Heizelements (R1-Rs) abhängt, + eine zeitabhangige Änderung der Größe in Reaktion auf das elektrische Signal zu bestimmen, und - basierend auf der zeitabhängigen Änderung der Größe für jedes Heizelement (R+-Rs) einen Flüssigkeitspegel zu erkennen.
2. Flüssigkeitspegel-Erkennungssystem gemäß Anspruch 1, dadurch gekennzeichnet, dass es mehrere Heizelemente (R1-Rs) umfasst, die an verschiedenen vertikalen Positionen zumindest in der Nahe des inneren Hohlraums (2.2) des Flüssigkeitstanks (2) angeordnet sind.
3. Flussigkeitspegel-Erkennungssystem gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass es mindestens ein Heizelement (R1-Rs) umfasst, das sich entlang eines vertikalen Bereichs zumindest in der Nahe des inneren Hohlraums (2.2) des Flüssigkeitstanks (2) erstreckt.
4. Flussigkeitspegel-Erkennungssystem gemäB einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass jedes Heizelement (R4-Rs) einen temperaturabhängigen Widerstand aufweist und die
Messvorrichtung (10) dafür ausgelegt ist, den Widerstand als die Größe zu erkennen, die von der Temperatur des Heizelements (R1-Rs) abhängt.
5. Flüssigkeitspegel-Erkennungssystem gemäB einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass es mindestens einen Temperatursensor umfasst, der mit der Messvorrichtung (10) verbunden ist, wobei mindestens ein Temperatursensor angrenzend an jedes Heizelement (R4-Rs) angeordnet ist und die Messvorrichtung (10) dafür ausgelegt ist, die Größe, die von der Temperatur des Heizelements (R4- Rs) abhängt, unter Verwendung des Temperatursensors zu erkennen.
6. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Anspriiche, dadurch gekennzeichnet, dass die Messvorrichtung (10) dafür ausgelegt ist, den Flüssigkeitspegel basierend auf einer Zeitentwicklung der Änderung der Größe zu schätzen.
7. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Messvorrichtung (10) dafür ausgelegt ist, ein elektrisches Signal, das mindestens eine Schrittfunktion umfasst, anzulegen.
8. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass mindestens ein Heizelement (R1-Rs) zumindest indirekt an einer Tankwand (2.1) des Flüssigkeitstanks (2) montiert ist.
9. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass mindestens ein Heizelement (R1-Rs) auf einem elektrisch isolierenden Substrat (4) angeordnet ist, wobei das Substrat (4) mit der Tankwand (2.1) verbunden ist.
10. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das elektrisch isolierende Substrat (4) ein flexibles Foliensubstrat ist.
11.Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Anspriiche, dadurch gekennzeichnet, dass mindestens ein Heizelement (R4-Rs) in die Tankwand (2.1) geformt ist.
12. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass es mindestens ein Referenzelement (Rrer) umfasst, das so angeordnet ist, dass es sich, unabhängig vom Flüssigkeitspegel, in einem Abstand zu der Flüssigkeit (20) innerhalb des Flüssigkeitstanks (2) befindet.
13. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Messvorrichtung (10) dafür ausgelegt ist, mindestens einen Widerstandsunterschied zwischen den Widerstanden eines Referenzelements (Res) und eines Heizelements (R4-Rs) zu erkennen.
14. Flüssigkeitspegel-Erkennungssystem gemäß einem der vorstehenden ; Ansprüche, dadurch gekennzeichnet, dass mindestens ein Referenzelement (Rıer) und mindestens ein Heizelement (R4-Rs) durch eine Schaltung (12) verbunden sind, die dafür ausgelegt ist, den Widerstandsunterschied zu erkennen.
15. Flüssigkeitspegel-Erkennungsverfahren für einen Flüssigkeitstank (2), wobei mindestens ein Heizelement (R+-Rs) zumindest in der Nähe eines inneren Hohlraums (2.2) des Flüssigkeitstanks (2) angeordnet ist, wobei das Verfahren umfasst: - Anlegen eines Zeitabhängigen elektrischen Signals an jedes Heizelement (Rı-Rs), um das Heizelement (R4-Rs) zu erwärmen, - Erkennen, für jedes Heizelement (Rı-Rs), einer Größe, die von einer Temperatur des Heizelements (R1-Rs) abhängt, - Bestimmen einer zeitabhängigen Änderung der Größe in Reaktion auf das elektrische Signal, und
- Erkennen eines Flüssigkeitspegels basierend auf der zeitabhängigen Änderung der Größe für jedes Heizelement (R1-Rs).
LU100847A 2018-07-03 2018-07-03 Liquid Level Detection System LU100847B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
LU100847A LU100847B1 (en) 2018-07-03 2018-07-03 Liquid Level Detection System
PCT/EP2019/067619 WO2020007803A1 (en) 2018-07-03 2019-07-01 Liquid level detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU100847A LU100847B1 (en) 2018-07-03 2018-07-03 Liquid Level Detection System

Publications (1)

Publication Number Publication Date
LU100847B1 true LU100847B1 (en) 2020-01-07

Family

ID=63047409

Family Applications (1)

Application Number Title Priority Date Filing Date
LU100847A LU100847B1 (en) 2018-07-03 2018-07-03 Liquid Level Detection System

Country Status (2)

Country Link
LU (1) LU100847B1 (de)
WO (1) WO2020007803A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021118464A1 (de) * 2021-07-16 2023-01-19 Hochschule Kaiserslautern Beutel aus einer flexiblen Folie zum Aufnehmen einer Flüssigkeit und System mit Beutel und Auswerteeinheit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5719332A (en) * 1994-09-28 1998-02-17 Vdo Adolf Schindling Ag Process and system for operating a level sensor
DE19704683A1 (de) * 1997-02-07 1998-08-20 Siemens Ag Vorrichtung zur Messung der Neigung eines Behälters relativ zu einem Flüssigkeitspegel in dem Behälter
WO2018013078A1 (en) * 2016-07-11 2018-01-18 Hewlett-Packard Development Company, L.P. Detecting a level of printable fluid in a container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5719332A (en) * 1994-09-28 1998-02-17 Vdo Adolf Schindling Ag Process and system for operating a level sensor
DE19704683A1 (de) * 1997-02-07 1998-08-20 Siemens Ag Vorrichtung zur Messung der Neigung eines Behälters relativ zu einem Flüssigkeitspegel in dem Behälter
WO2018013078A1 (en) * 2016-07-11 2018-01-18 Hewlett-Packard Development Company, L.P. Detecting a level of printable fluid in a container

Also Published As

Publication number Publication date
WO2020007803A1 (en) 2020-01-09

Similar Documents

Publication Publication Date Title
US6098457A (en) Fluid level detector using thermoresistive sensor
US20070113646A1 (en) Liquid sensor and ice detector
EP3505877B1 (de) Tintenfüllstandsmessung
US6776037B2 (en) Microprocessor-based liquid sensor and ice detector
CN201837422U (zh) 流体流速传感器
US20080041152A1 (en) Fuel level sensor apparatus
CN107209043B (zh) 具有诊断功能的热式流量测量设备
KR20180062462A (ko) 액체 레벨 표시
KR20080012239A (ko) 액체 부피 측정 방법 및 시스템
CN101865736A (zh) 用于温度测量的传感器元件装置
LU100847B1 (en) Liquid Level Detection System
US7698939B2 (en) Thermistor-based fuel sensor
US20060042375A1 (en) Fluid-level sensing and fluid detection
US8689625B2 (en) Method and apparatus for detecting the level of a liquid in monitoring a dispense/aspirate process
US8118481B2 (en) Fluid detector
US20070125663A1 (en) Liquid-condition detection element and detection sensor
JP2004294208A (ja) 水位−水温検知用センサ
SE1251385A1 (sv) Metod för testning av temperaturgivare, och en testanordning
CN104802517A (zh) 数码喷印设备的墨水液位检测装置、方法和数码喷印设备
AU2019345304A1 (en) Level sensing for dispenser canisters
RU2506543C1 (ru) Датчик контроля дискретных уровней жидкости с функцией измерения температуры и контроля массового расхода жидкой среды
JP3600843B2 (ja) 高応答液面検出器
WO2023043474A1 (en) Fluid flow meters
JP4343053B2 (ja) タンク内液体の漏れ検知装置
DE202005008774U1 (de) Schaltungsanordnung zur Messung der Strömungsgeschwindigkeit eines Fluids

Legal Events

Date Code Title Description
FG Patent granted

Effective date: 20200107