WO2002063249A3 - Material level sensing system and method - Google Patents

Material level sensing system and method Download PDF

Info

Publication number
WO2002063249A3
WO2002063249A3 PCT/US2002/003463 US0203463W WO02063249A3 WO 2002063249 A3 WO2002063249 A3 WO 2002063249A3 US 0203463 W US0203463 W US 0203463W WO 02063249 A3 WO02063249 A3 WO 02063249A3
Authority
WO
WIPO (PCT)
Prior art keywords
probe
vessel
return signals
conductor
transmission line
Prior art date
Application number
PCT/US2002/003463
Other languages
French (fr)
Other versions
WO2002063249A2 (en
Inventor
Ernesto Barrantes
Original Assignee
Ernesto Barrantes
Venture Measurement Company
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 Ernesto Barrantes, Venture Measurement Company filed Critical Ernesto Barrantes
Priority to AU2002245391A priority Critical patent/AU2002245391A1/en
Publication of WO2002063249A2 publication Critical patent/WO2002063249A2/en
Publication of WO2002063249A3 publication Critical patent/WO2002063249A3/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
    • G01F23/28—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
    • G01F23/284—Electromagnetic waves

Landscapes

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

Abstract

A system for measuring the level of material (16) in a vessel (14) includes a transmission line probe (12) having first and second conductors (18, 20) adapted to be positioned for contact with material in the vessel. Electronics (22) are coupled to the transmission line probe for launching microwave radiation along the probe conductors simultaneously and 180° out of phase, such that portions of such radiation are reflected from the impedance discontinuity at the air/material interface within the vessel. A differential amplifier (34) subtracts the return signals at one probe conductor from the return signals at the other conductor so as to cancel noise received from the probe conductor while enhancing the strength of return signals from the material interface. Gain of the differential amplifier is controlled as a function of the apparent distance to the material surface, and level of the air/material interface is determined employing time domain reflectometry techniques.
PCT/US2002/003463 2001-02-08 2002-02-05 Material level sensing system and method WO2002063249A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002245391A AU2002245391A1 (en) 2001-02-08 2002-02-05 Material level sensing system and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26745301P 2001-02-08 2001-02-08
US60/267,453 2001-02-08

Publications (2)

Publication Number Publication Date
WO2002063249A2 WO2002063249A2 (en) 2002-08-15
WO2002063249A3 true WO2002063249A3 (en) 2002-11-07

Family

ID=23018833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/003463 WO2002063249A2 (en) 2001-02-08 2002-02-05 Material level sensing system and method

Country Status (2)

Country Link
AU (1) AU2002245391A1 (en)
WO (1) WO2002063249A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070090992A1 (en) * 2005-10-21 2007-04-26 Olov Edvardsson Radar level gauge system and transmission line probe for use in such a system
EP2154495B1 (en) * 2008-08-15 2013-05-22 Sick Ag TDR sensor and measuring method
DE102014114752A1 (en) * 2014-10-10 2016-04-14 Krohne S. A. S. Method and device for level measurement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5578962A (en) * 1995-05-10 1996-11-26 Mca Technologies, Inc. Instrumentation amplifier for sensor signal conditioning using low-cost, high-accuracy analog circuitry
US5609059A (en) * 1994-12-19 1997-03-11 The Regents Of The University Of California Electronic multi-purpose material level sensor
US6085589A (en) * 1996-12-23 2000-07-11 Venture Measurement Company Llc Material level sensing system calibration
US6121780A (en) * 1996-10-07 2000-09-19 Cruickshank; William T. Material interface level sensing
US6178817B1 (en) * 1996-11-22 2001-01-30 Venture Measurement Company Llc Material level sensing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5609059A (en) * 1994-12-19 1997-03-11 The Regents Of The University Of California Electronic multi-purpose material level sensor
US5578962A (en) * 1995-05-10 1996-11-26 Mca Technologies, Inc. Instrumentation amplifier for sensor signal conditioning using low-cost, high-accuracy analog circuitry
US6121780A (en) * 1996-10-07 2000-09-19 Cruickshank; William T. Material interface level sensing
US6178817B1 (en) * 1996-11-22 2001-01-30 Venture Measurement Company Llc Material level sensing
US6085589A (en) * 1996-12-23 2000-07-11 Venture Measurement Company Llc Material level sensing system calibration

Also Published As

Publication number Publication date
WO2002063249A2 (en) 2002-08-15
AU2002245391A1 (en) 2002-08-19

Similar Documents

Publication Publication Date Title
JP3860802B2 (en) Electronic multipurpose substance level sensor
JP5719152B2 (en) Single antenna FM / CW radar
US20080036649A1 (en) Time-of-flight-ranging system and method for calibrating such a system
CA2391981C (en) Interferometric microwave sensor
US20140104099A1 (en) Guided wave radar probe reference target
US20110209543A1 (en) System and Method for Accurately Measuring Fluid Level in a Vessel
ATE211542T1 (en) BOUNDARY LAYER LEVEL MEASUREMENT
WO1993022802A3 (en) Waveguide to transmission line transition
EP0806680A3 (en) Microwave air-path clearance sensor
US6701783B2 (en) Device and a process for determining the positions of border areas between different mediums
CA2117464A1 (en) Device for Measuring a Level of Material Using Microwaves
EP2629122A3 (en) Directional resistivity measurements for azimuthal proximity detection of bed boundaries
ATE217977T1 (en) ELECTROMAGNETIC TRANSDUCER WITH LIMITED FIELD OF VIEW AND METHOD
GB2304483A (en) Determining location of object in a medium
WO1998025109A3 (en) Material level sensing
JP2002535660A (en) Measurement of dielectric constant of process products using low power radar level transmitter
FR2541465A1 (en) CONTINUOUS WAVE RADAR MODULATED IN FREQUENCY AND ITS APPLICATION TO AN ALTIMETRIC PROBE
NO905314D0 (en) LEVEL MEASUREMENT WITH MICROWAVES.
CN108225483B (en) Tank arrangement
WO2002063249A3 (en) Material level sensing system and method
CA2314213A1 (en) Device for measuring the material level in a vessel
US6972690B1 (en) System and method for transmission of electrical signals in imperfectly-conducting media
GB2235842A (en) Device for determining the profile of the loading surface of a shaft furnace
JP2006133088A (en) Method and system for measuring moisture distribution in soil
Thiel Relative wave tilt measurements at VLF

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP