WO2014166479A3 - Kapazitiver füllstandssensor - Google Patents

Kapazitiver füllstandssensor Download PDF

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Publication number
WO2014166479A3
WO2014166479A3 PCT/DE2014/100121 DE2014100121W WO2014166479A3 WO 2014166479 A3 WO2014166479 A3 WO 2014166479A3 DE 2014100121 W DE2014100121 W DE 2014100121W WO 2014166479 A3 WO2014166479 A3 WO 2014166479A3
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
fill level
measurement
shielding
amplitude
Prior art date
Application number
PCT/DE2014/100121
Other languages
English (en)
French (fr)
Other versions
WO2014166479A2 (de
WO2014166479A4 (de
Inventor
Frank Winkens
Jürgen Glock
Original Assignee
Balluff Gmbh
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 Balluff Gmbh filed Critical Balluff Gmbh
Priority to US14/783,200 priority Critical patent/US9658095B2/en
Priority to CN201480024880.4A priority patent/CN105164505B/zh
Publication of WO2014166479A2 publication Critical patent/WO2014166479A2/de
Publication of WO2014166479A3 publication Critical patent/WO2014166479A3/de
Publication of WO2014166479A4 publication Critical patent/WO2014166479A4/de

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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • 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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • 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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes

Landscapes

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

Abstract

Die Erfindung betrifft einen kapazitiven Füllstandssensor (10) zur Messung des Füllstands (H1, H2; Η1', H2') eines Mediums (18) in einem Behälter (14), mit einer Elektrodeneinheit (12), die eine streifenförmige Mess-Elektrode (22), eine streifenförmige Gegen-Elektrode (24) und eine streifenförmige Abschirm-Elektrode (26, 28, 40) enthält, wobei die Abschirm-Elektrode (26, 28, 40) die Mess-Elektrode (22) zumindest teilweise umgibt. Der erfindungsgemäße kapazitive Füllstandssensor (10) zeichnet sich dadurch aus, dass eine erste Wechselspannungsquelle (60) mit vorgegebener Frequenz und Amplitude vorgesehen ist, an welcher die Abschirm-Elektrode (26, 28, 40) angeschlossen ist, sodass ein zwischen der Abschirm-Elektrode (26, 28, 40) und der Mess-Elektrode (22) ausgebildeter Abschirm-Kondensator (54, 56, 58) eine Abschirm-Kapazität aufweist, die proportional zur Länge der Abschirm-Elektrode (26, 28, 40) ist, dass eine zweite Wechselspannungsquelle (68) gleicher Frequenz und mit vorgegebener zweiter Amplitude vorgesehen ist, wobei die zweite Amplitude gegenphasig zur ersten Amplitude ist, an welcher die Gegen-Elektrode (24) angeschlossen ist, sodass ein zwischen der Gegen-Elektrode (24) und der Mess-Elektrode (22) ausgebildeter Mess-Kondensator (52) eine Mess-Kapazität aufweist, die proportional zum Füllstand (H1, H2; Η1', H2') ist, und dass die an der Mess-Elektrode (22) liegende Mess-Elektroden-Spannung (72) zur Ermittlung des Füllstands (H1, H2; Η1', H2') herangezogen wird.
PCT/DE2014/100121 2013-04-09 2014-04-08 Kapazitiver füllstandssensor WO2014166479A2 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/783,200 US9658095B2 (en) 2013-04-09 2014-04-08 Capacitive fill level sensor
CN201480024880.4A CN105164505B (zh) 2013-04-09 2014-04-08 电容性填充水平传感器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013005963.1 2013-04-09
DE102013005963.1A DE102013005963A1 (de) 2013-04-09 2013-04-09 Kapazitiver Füllstandssensor

Publications (3)

Publication Number Publication Date
WO2014166479A2 WO2014166479A2 (de) 2014-10-16
WO2014166479A3 true WO2014166479A3 (de) 2014-12-18
WO2014166479A4 WO2014166479A4 (de) 2015-02-05

Family

ID=51032867

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2014/100121 WO2014166479A2 (de) 2013-04-09 2014-04-08 Kapazitiver füllstandssensor

Country Status (4)

Country Link
US (1) US9658095B2 (de)
CN (1) CN105164505B (de)
DE (1) DE102013005963A1 (de)
WO (1) WO2014166479A2 (de)

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WO2018208545A1 (en) * 2017-05-09 2018-11-15 Touchsensor Technologies, Llc Driven shield capacitive fluid level sensor
RU175330U1 (ru) * 2017-05-30 2017-11-30 федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный технический университет" Емкостный датчик для измерения уровня жидкости
US10323973B2 (en) * 2017-08-28 2019-06-18 Semiconductor Components Industries, Llc Capacitive sensor for liquid sensing
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WO2019213515A1 (en) 2018-05-03 2019-11-07 Nypro Inc. Apparatus, system, and method of providing a content level monitor
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EP4148398A1 (de) 2018-11-30 2023-03-15 Carrier Corporation Gedruckter kapazitiver flüssigkeitspegelsensor zur brandunterdrückung
RU190039U1 (ru) * 2019-03-11 2019-06-17 федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный технический университет" Датчик для измерения уровня жидкости
CN111829613A (zh) 2019-04-22 2020-10-27 密克罗奇普技术公司 双极性互电容式液体感测
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JP2021056081A (ja) * 2019-09-30 2021-04-08 セイコーエプソン株式会社 物理量検出装置および印刷装置
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US20210197142A1 (en) 2019-12-31 2021-07-01 Pall Corporation Buffer management system with manifold for bioprocessing system
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EP4118401A4 (de) * 2020-03-11 2024-04-10 Analog Devices Inc System zur überwachung der arzneimittelabgabe
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Also Published As

Publication number Publication date
CN105164505A (zh) 2015-12-16
DE102013005963A1 (de) 2014-10-09
WO2014166479A2 (de) 2014-10-16
CN105164505B (zh) 2018-07-31
US9658095B2 (en) 2017-05-23
WO2014166479A4 (de) 2015-02-05
US20160047683A1 (en) 2016-02-18

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