FR2765327B1 - METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PRODUCT IN A TANK - Google Patents

METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PRODUCT IN A TANK

Info

Publication number
FR2765327B1
FR2765327B1 FR9708050A FR9708050A FR2765327B1 FR 2765327 B1 FR2765327 B1 FR 2765327B1 FR 9708050 A FR9708050 A FR 9708050A FR 9708050 A FR9708050 A FR 9708050A FR 2765327 B1 FR2765327 B1 FR 2765327B1
Authority
FR
France
Prior art keywords
absence
tank
detecting
product
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 - Fee Related
Application number
FR9708050A
Other languages
French (fr)
Other versions
FR2765327A1 (en
Inventor
Marie Helene Froger
Pascal Coudray
Francois Delumeau
Alexandre Dodge
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to FR9708050A priority Critical patent/FR2765327B1/en
Priority to US09/104,782 priority patent/US6438500B1/en
Publication of FR2765327A1 publication Critical patent/FR2765327A1/en
Application granted granted Critical
Publication of FR2765327B1 publication Critical patent/FR2765327B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01F23/266—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17566—Ink level or ink residue control
    • 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
    • G01F23/265—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 for discrete levels

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)
FR9708050A 1997-06-26 1997-06-26 METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PRODUCT IN A TANK Expired - Fee Related FR2765327B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9708050A FR2765327B1 (en) 1997-06-26 1997-06-26 METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PRODUCT IN A TANK
US09/104,782 US6438500B1 (en) 1997-06-26 1998-06-26 Method and device for detecting the absence of a product in a reservoir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9708050A FR2765327B1 (en) 1997-06-26 1997-06-26 METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PRODUCT IN A TANK

Publications (2)

Publication Number Publication Date
FR2765327A1 FR2765327A1 (en) 1998-12-31
FR2765327B1 true FR2765327B1 (en) 1999-09-24

Family

ID=9508503

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9708050A Expired - Fee Related FR2765327B1 (en) 1997-06-26 1997-06-26 METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PRODUCT IN A TANK

Country Status (1)

Country Link
FR (1) FR2765327B1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1317243A (en) * 1969-05-28 1973-05-16 Solartron Electronic Group Real-time correlator
US4853718A (en) * 1988-08-15 1989-08-01 Xerox Corporation On chip conductive fluid sensing circuit
US5185783A (en) * 1989-08-30 1993-02-09 Canon Kabushiki Kaisha Communication apparatus for detecting a calling signal from a line, for detecting a data communication signal from a calling station, and for generating a quasi-calling tone

Also Published As

Publication number Publication date
FR2765327A1 (en) 1998-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20140228