EP1017971A4 - Detecteur de niveau de liquide a effet capacitif compense - Google Patents

Detecteur de niveau de liquide a effet capacitif compense

Info

Publication number
EP1017971A4
EP1017971A4 EP98942217A EP98942217A EP1017971A4 EP 1017971 A4 EP1017971 A4 EP 1017971A4 EP 98942217 A EP98942217 A EP 98942217A EP 98942217 A EP98942217 A EP 98942217A EP 1017971 A4 EP1017971 A4 EP 1017971A4
Authority
EP
European Patent Office
Prior art keywords
liquid level
level sensor
capacitive liquid
compensated capacitive
compensated
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.)
Withdrawn
Application number
EP98942217A
Other languages
German (de)
English (en)
Other versions
EP1017971A1 (fr
Inventor
Yishay Netzer
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.)
Yishay Sensors Ltd
Original Assignee
Yishay Sensors Ltd
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 Yishay Sensors Ltd filed Critical Yishay Sensors Ltd
Priority claimed from PCT/US1998/017477 external-priority patent/WO1999010714A1/fr
Publication of EP1017971A1 publication Critical patent/EP1017971A1/fr
Publication of EP1017971A4 publication Critical patent/EP1017971A4/fr
Withdrawn legal-status Critical Current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
    • G01F23/26—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/02—Details
    • G01C9/06—Electric or photoelectric indication or reading means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
    • G01C9/20—Measuring inclination, e.g. by clinometers, by levels by using liquids the indication being based on the inclination of the surface of a liquid relative to its container
    • 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
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/02—Details
    • G01C9/06—Electric or photoelectric indication or reading means
    • G01C2009/062—Electric or photoelectric indication or reading means capacitive

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
EP98942217A 1997-08-25 1998-08-24 Detecteur de niveau de liquide a effet capacitif compense Withdrawn EP1017971A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US917187 1992-07-22
US118371 1993-09-07
US91718797A 1997-08-25 1997-08-25
US11837198A 1998-07-17 1998-07-17
PCT/US1998/017477 WO1999010714A1 (fr) 1997-08-25 1998-08-24 Detecteur de niveau de liquide a effet capacitif compense

Publications (2)

Publication Number Publication Date
EP1017971A1 EP1017971A1 (fr) 2000-07-12
EP1017971A4 true EP1017971A4 (fr) 2006-09-20

Family

ID=26816268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98942217A Withdrawn EP1017971A4 (fr) 1997-08-25 1998-08-24 Detecteur de niveau de liquide a effet capacitif compense

Country Status (2)

Country Link
EP (1) EP1017971A4 (fr)
AU (1) AU9032198A (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050431A (en) * 1990-09-12 1991-09-24 Robertshaw Controls Company Liquid level sensing device and methods of making an operating the same
WO1996035929A1 (fr) * 1995-05-08 1996-11-14 Ploechinger Heinz Detecteur capacitif de niveau

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050431A (en) * 1990-09-12 1991-09-24 Robertshaw Controls Company Liquid level sensing device and methods of making an operating the same
WO1996035929A1 (fr) * 1995-05-08 1996-11-14 Ploechinger Heinz Detecteur capacitif de niveau

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9910714A1 *

Also Published As

Publication number Publication date
AU9032198A (en) 1999-03-16
EP1017971A1 (fr) 2000-07-12

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000321

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TAMAR SENSORS LTD.

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: YISHAY SENSORS LTD.

A4 Supplementary search report drawn up and despatched

Effective date: 20060821

17Q First examination report despatched

Effective date: 20070903

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080115