DE3835406C2 - - Google Patents

Info

Publication number
DE3835406C2
DE3835406C2 DE19883835406 DE3835406A DE3835406C2 DE 3835406 C2 DE3835406 C2 DE 3835406C2 DE 19883835406 DE19883835406 DE 19883835406 DE 3835406 A DE3835406 A DE 3835406A DE 3835406 C2 DE3835406 C2 DE 3835406C2
Authority
DE
Germany
Prior art keywords
electrical
reference reflector
pulse
time
filling material
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE19883835406
Other languages
German (de)
English (en)
Other versions
DE3835406A1 (de
Inventor
Cai Soenderborg Dk Risskov
Poul Boerge Juul Nordborg Dk Nielsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Priority to DE19883835406 priority Critical patent/DE3835406A1/de
Priority to GB8923413A priority patent/GB2225113B/en
Priority to DK514289A priority patent/DK167714B1/da
Priority to JP1271428A priority patent/JPH0674995B2/ja
Publication of DE3835406A1 publication Critical patent/DE3835406A1/de
Application granted granted Critical
Publication of DE3835406C2 publication Critical patent/DE3835406C2/de
Granted legal-status Critical Current

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
    • G01F23/241—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
    • G01F23/241—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
    • G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2962—Measuring transit time of reflected waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
DE19883835406 1988-10-18 1988-10-18 Vorrichtung zum messen eines fuellstandes Granted DE3835406A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19883835406 DE3835406A1 (de) 1988-10-18 1988-10-18 Vorrichtung zum messen eines fuellstandes
GB8923413A GB2225113B (en) 1988-10-18 1989-10-17 State of fill-determining apparatus
DK514289A DK167714B1 (da) 1988-10-18 1989-10-17 Indretning til maaling af et medieniveau
JP1271428A JPH0674995B2 (ja) 1988-10-18 1989-10-18 充填状態測定装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883835406 DE3835406A1 (de) 1988-10-18 1988-10-18 Vorrichtung zum messen eines fuellstandes

Publications (2)

Publication Number Publication Date
DE3835406A1 DE3835406A1 (de) 1990-04-19
DE3835406C2 true DE3835406C2 (ja) 1991-07-04

Family

ID=6365349

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883835406 Granted DE3835406A1 (de) 1988-10-18 1988-10-18 Vorrichtung zum messen eines fuellstandes

Country Status (4)

Country Link
JP (1) JPH0674995B2 (ja)
DE (1) DE3835406A1 (ja)
DK (1) DK167714B1 (ja)
GB (1) GB2225113B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416038A1 (de) * 1994-05-06 1995-11-09 Sigmund Birle Regenwassernutzungsanlage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4405238C2 (de) * 1994-02-18 1998-07-09 Endress Hauser Gmbh Co Anordnung zur Messung des Füllstands in einem Behälter
US5672975A (en) 1995-06-07 1997-09-30 Rosemount Inc. Two-wire level transmitter
IT1310723B1 (it) 1999-09-16 2002-02-22 Elbi Int Spa Dispositivo per rilevare le condizioni di funzionamento di almenouna girante di spruzzatura di una macchina lavastoviglie
DE10014887B4 (de) * 2000-03-24 2011-08-11 Volkswagen AG, 38440 Vorrichtung zur Bestimmung der Füllstandshöhe eines Füllmediums in einem Tank, insbesondere einem Tank eines Kraftfahrzeugs
US7017408B2 (en) * 2004-02-13 2006-03-28 Be Intellectual Property, Inc. Electro-optic liquid level sensing system for aircraft beverage brewing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790291A (fr) * 1971-10-23 1973-02-15 Licentia Gmbh Dispositif de determination du niveau d'un liquide electriquement conducteur, notamment pour des machines a laver le linge et la vaisselle
DE2743409C3 (de) * 1977-09-27 1980-09-04 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Ve rstärkeranordnung für einen nach dem Echoprinzip arbeitenden Ultraschall-Füllstandgrenzschalter
DE3339984A1 (de) * 1983-11-04 1985-05-23 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Schall- bzw. ultraschall-entfernungsmessgeraet
GB2198535B (en) * 1986-11-01 1991-06-05 Parke Davis & Co Ltd Apparatus and method for determining the amount of substance in a vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416038A1 (de) * 1994-05-06 1995-11-09 Sigmund Birle Regenwassernutzungsanlage

Also Published As

Publication number Publication date
DK514289D0 (da) 1989-10-17
JPH02159522A (ja) 1990-06-19
DK167714B1 (da) 1993-12-06
GB2225113A (en) 1990-05-23
DK514289A (da) 1990-04-19
DE3835406A1 (de) 1990-04-19
JPH0674995B2 (ja) 1994-09-21
GB8923413D0 (en) 1989-12-06
GB2225113B (en) 1992-10-07

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee