FR2242660A1 - Contactless displacement sensor for molten metal - uses gas around electrode to produce a corona discharge - Google Patents

Contactless displacement sensor for molten metal - uses gas around electrode to produce a corona discharge

Info

Publication number
FR2242660A1
FR2242660A1 FR7331836A FR7331836A FR2242660A1 FR 2242660 A1 FR2242660 A1 FR 2242660A1 FR 7331836 A FR7331836 A FR 7331836A FR 7331836 A FR7331836 A FR 7331836A FR 2242660 A1 FR2242660 A1 FR 2242660A1
Authority
FR
France
Prior art keywords
displacement sensor
produce
electrode
molten metal
corona discharge
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.)
Granted
Application number
FR7331836A
Other languages
French (fr)
Other versions
FR2242660B3 (en
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.)
LAMAIN HENRI FR
Original Assignee
LAMAIN HENRI FR
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 LAMAIN HENRI FR filed Critical LAMAIN HENRI FR
Priority to FR7331836A priority Critical patent/FR2242660A1/en
Publication of FR2242660A1 publication Critical patent/FR2242660A1/en
Application granted granted Critical
Publication of FR2242660B3 publication Critical patent/FR2242660B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The contactless displacement sensor can measure a distance (D) of up to a few centimetres without mechanical contact. It has a tungsten electrode (1) in an isolating refractory tube (2). The tube (2) contains a gas, such as nitrogen or argon, which is ejected onto the surface (6) whose distance is to be measured. The electrode (1) is connected through a resistor (3) of a few tens of megohms to a high voltage generator (4). An ammeter (5) measures the electric current flowing in the circuit in which the last element is the conductive surface (6). An electric discharge by corona effect is created between the electrode (1) and the conductive surface (6) such that the current in the ammeter is a measure of the distance (D) to the surface (6).
FR7331836A 1973-09-04 1973-09-04 Contactless displacement sensor for molten metal - uses gas around electrode to produce a corona discharge Granted FR2242660A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7331836A FR2242660A1 (en) 1973-09-04 1973-09-04 Contactless displacement sensor for molten metal - uses gas around electrode to produce a corona discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7331836A FR2242660A1 (en) 1973-09-04 1973-09-04 Contactless displacement sensor for molten metal - uses gas around electrode to produce a corona discharge

Publications (2)

Publication Number Publication Date
FR2242660A1 true FR2242660A1 (en) 1975-03-28
FR2242660B3 FR2242660B3 (en) 1976-08-06

Family

ID=9124595

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7331836A Granted FR2242660A1 (en) 1973-09-04 1973-09-04 Contactless displacement sensor for molten metal - uses gas around electrode to produce a corona discharge

Country Status (1)

Country Link
FR (1) FR2242660A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1873479A1 (en) * 2006-06-27 2008-01-02 Abb As Device for distance measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1873479A1 (en) * 2006-06-27 2008-01-02 Abb As Device for distance measurement

Also Published As

Publication number Publication date
FR2242660B3 (en) 1976-08-06

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Legal Events

Date Code Title Description
ST Notification of lapse