FR2468107A1 - Sensor for measuring level of inflammable product - utilises blanking plate on membrane to obscure light between optical fibres - Google Patents
Sensor for measuring level of inflammable product - utilises blanking plate on membrane to obscure light between optical fibres Download PDFInfo
- Publication number
- FR2468107A1 FR2468107A1 FR7925915A FR7925915A FR2468107A1 FR 2468107 A1 FR2468107 A1 FR 2468107A1 FR 7925915 A FR7925915 A FR 7925915A FR 7925915 A FR7925915 A FR 7925915A FR 2468107 A1 FR2468107 A1 FR 2468107A1
- Authority
- FR
- France
- Prior art keywords
- sensor
- light
- mobile
- sensor according
- membrane
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title abstract description 5
- 239000012528 membrane Substances 0.000 title abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
-
- 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
- G01F23/14—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 measurement of pressure
- G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
- G01F23/164—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid using a diaphragm, bellow as transmitting element
-
- 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
- G01F23/292—Light, e.g. infrared or ultraviolet
- G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
- G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
L'invention concerne un capteur de déplacement, spécialement conçu pour la mesure d'un niveau de produit, notamment d'un produit inflammable, dans un réservoir. The invention relates to a displacement sensor, specially designed for measuring a level of product, in particular a flammable product, in a tank.
Ce capteur comprend un mobile soumis au déplacemen à capter et un faisceau de fibres optiques ayant chacune une extrémité d'entrée de lumière
lesdites extrémités d'entrée de lumière tant réparties le long du trajet de déplacement du mobile et étant éclairées chacune par une source de lumière disposée on sorte que le mobile, en se déplaçant, s'interpose successivement entre chacune des extrémités d'entrée de lumière et la source correspondante.This sensor comprises a mobile subject to the displacement to be captured and a bundle of optical fibers each having a light entry end.
said light inlet ends being distributed along the path of movement of the mobile and being each illuminated by a light source arranged so that the mobile, while moving, is interposed successively between each of the light entry ends and the corresponding source.
On décrira ci-après une réalisation préférée de ce capteur, en référence aux figures du deasin-joint qui montrent
- en figure 1, un schéma général du capteur
- en figure 2, un schéma de détail de la partie optique du capteur.A preferred embodiment of this sensor will be described below, with reference to the figures in the attached deasin which show
- in figure 1, a general diagram of the sensor
- In Figure 2, a detail diagram of the optical part of the sensor.
La figure 1 montre le capteur 1 dans un réservoir 2. Ce capteur comprend un bottier 3 qui comporte une entrée de pression 4 en communication avec un côté d'une paroi ou membrane 5 dont l'autre côté est en communication avec l'atmosphère. Figure 1 shows the sensor 1 in a tank 2. This sensor comprises a housing 3 which has a pressure inlet 4 in communication with one side of a wall or membrane 5 whose other side is in communication with the atmosphere.
La paroi 5 réagit comme une paroi de manomètre aux variations de la pression différentielle à laquelle elle est soumise en se déplaçant ou se déformant de façon correspondante et ce déplacement ou cette déformation provoque un déplacement correspondant d'un mobile constitué par une plaquette 6 située du côté soumis à la pression atmosphèrique. The wall 5 reacts like a pressure gauge wall to variations in the differential pressure to which it is subjected by moving or deforming in a corresponding manner and this displacement or this deformation causes a corresponding displacement of a mobile consisting of a plate 6 located on the side subject to atmospheric pressure.
Dans le cas représenté, la paroi 5 est montée & soufflet. In the case shown, the wall 5 is mounted & bellows.
Le mobile ou plaquette 6 se déplace sur un trajet rectiligne bordé d'un côté par un support 7 qui porte des extrémités d'entrée de lumière 8 des fibres 9 d'un faisceau 10 de fibres optiques et, -1e l'autre c8té, par un support 11 qui porte une pluralitZ correspondante d'extrémités de sortie de lumière 12 des fibres 13 d'un autre faisceau 14 de fibres optiques (figure 2). The mobile or plate 6 moves on a straight path bordered on one side by a support 7 which carries light entry ends 8 of the fibers 9 of a bundle 10 of optical fibers and, -1e the other side, by a support 11 which carries a corresponding plurality of light output ends 12 of the fibers 13 of another bundle 14 of optical fibers (FIG. 2).
En se déplaçant, le mobile 6 cache successivement les entrées 8 qui sont réparties le long du trajet du mobile. By moving, the mobile 6 successively hides the inputs 8 which are distributed along the path of the mobile.
La portion du mobile qui peut constituer un obturateur est choisie à volonté. DPns le cas représenté, on a supposé que cette portion est constituée par toute la longueur du mobile. The portion of the mobile which can constitute a shutter is chosen at will. DPns the case shown, it was assumed that this portion is formed by the entire length of the mobile.
La sonde 1 est reliée par les faisceaux de fibres optiques 10, 14 à un appareillage 15 placé à distance, extérieur au réservoir, qui comprend des moyens 16 pour éclairer les fibres du faisceau 14 et des moyens 17 pour détecter l'état d'éclairement des fibres du faisceau 10. The probe 1 is connected by the optical fiber bundles 10, 14 to an apparatus 15 placed at a distance, outside the tank, which comprises means 16 for lighting the fibers of the bundle 14 and means 17 for detecting the lighting state fibers of bundle 10.
Le capteur permet de détecter optiquement le niveau du liquide 18, du mazout par exemple, dans le réservoir 2 sans intervention de courant électrique dans le réservoir. The sensor makes it possible to optically detect the level of the liquid 18, of the fuel oil for example, in the tank 2 without the intervention of electric current in the tank.
L'invention n'est pas limitée à cette réalisation. The invention is not limited to this embodiment.
Dans des variantes, par exemple
- la source de lumière qui éclaire les fibres du faisceau 14 est la lumière ambiante,
- les différentes extrémités d'entrée de lumière 8 sont éclairées par une source de lumière commune,
- les différentes extrémités d'entrée de lumière sont réparties des deux côtés du trajet du mobile,
- le trajet du mobile n'est pas rectiligne.In variants, for example
the light source which illuminates the fibers of the beam 14 is ambient light,
the different light input ends 8 are lit by a common light source,
- the different light entry ends are distributed on both sides of the path of the mobile,
- the path of the mobile is not straight.
L'invention n'est pas limitée à l'application qui a été décrite. The invention is not limited to the application which has been described.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7925915A FR2468107A1 (en) | 1979-10-18 | 1979-10-18 | Sensor for measuring level of inflammable product - utilises blanking plate on membrane to obscure light between optical fibres |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7925915A FR2468107A1 (en) | 1979-10-18 | 1979-10-18 | Sensor for measuring level of inflammable product - utilises blanking plate on membrane to obscure light between optical fibres |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2468107A1 true FR2468107A1 (en) | 1981-04-30 |
Family
ID=9230813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7925915A Pending FR2468107A1 (en) | 1979-10-18 | 1979-10-18 | Sensor for measuring level of inflammable product - utilises blanking plate on membrane to obscure light between optical fibres |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2468107A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3738792A1 (en) * | 1987-10-01 | 1989-04-20 | Juvena Produits De Beaute S A | Method for indicating the filling quantity of filling goods in a container and indicating device for the filling quantity |
EP0464977A1 (en) * | 1990-07-03 | 1992-01-08 | Zentralinstitut Für Festkörperphysik Und Werkstofforschung | Liquid level detector with anti-corrosion and anti-fouling means |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2054856A5 (en) * | 1969-07-29 | 1971-05-07 | Fibre Optics Ind Inc | |
US3713338A (en) * | 1971-01-18 | 1973-01-30 | Gen Motors Corp | Fiber optic liquid level indicator |
DE2634919A1 (en) * | 1976-08-03 | 1978-02-09 | Kloeckner Humboldt Deutz Ag | Oil level monitor for e.g. aircraft gear boxes - has float interrupting one of set of light paths passing through channel via optical fibres to display point |
US4119860A (en) * | 1976-01-08 | 1978-10-10 | Cornelius Leonard Gooley | Fluid measurement |
FR2403056A1 (en) * | 1977-09-15 | 1979-04-13 | Electrolux Ab | INDICATOR DEVICE FOR VACUUM CLEANER |
-
1979
- 1979-10-18 FR FR7925915A patent/FR2468107A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2054856A5 (en) * | 1969-07-29 | 1971-05-07 | Fibre Optics Ind Inc | |
US3713338A (en) * | 1971-01-18 | 1973-01-30 | Gen Motors Corp | Fiber optic liquid level indicator |
US4119860A (en) * | 1976-01-08 | 1978-10-10 | Cornelius Leonard Gooley | Fluid measurement |
DE2634919A1 (en) * | 1976-08-03 | 1978-02-09 | Kloeckner Humboldt Deutz Ag | Oil level monitor for e.g. aircraft gear boxes - has float interrupting one of set of light paths passing through channel via optical fibres to display point |
FR2403056A1 (en) * | 1977-09-15 | 1979-04-13 | Electrolux Ab | INDICATOR DEVICE FOR VACUUM CLEANER |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3738792A1 (en) * | 1987-10-01 | 1989-04-20 | Juvena Produits De Beaute S A | Method for indicating the filling quantity of filling goods in a container and indicating device for the filling quantity |
EP0464977A1 (en) * | 1990-07-03 | 1992-01-08 | Zentralinstitut Für Festkörperphysik Und Werkstofforschung | Liquid level detector with anti-corrosion and anti-fouling means |
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