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 dischargeInfo
- 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
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).
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1873479A1 (en) * | 2006-06-27 | 2008-01-02 | Abb As | Device for distance measurement |
-
1973
- 1973-09-04 FR FR7331836A patent/FR2242660A1/en active Granted
Cited By (1)
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 |