FR2643710A1 - DEVICE FOR GUIDING ELECTROMAGNETIC WAVES - Google Patents

DEVICE FOR GUIDING ELECTROMAGNETIC WAVES Download PDF

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Publication number
FR2643710A1
FR2643710A1 FR9002254A FR9002254A FR2643710A1 FR 2643710 A1 FR2643710 A1 FR 2643710A1 FR 9002254 A FR9002254 A FR 9002254A FR 9002254 A FR9002254 A FR 9002254A FR 2643710 A1 FR2643710 A1 FR 2643710A1
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FR
France
Prior art keywords
light
electromagnetic waves
channel
opening
receiver
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
Application number
FR9002254A
Other languages
French (fr)
Inventor
Alfred Scherz
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of FR2643710A1 publication Critical patent/FR2643710A1/en
Pending legal-status Critical Current

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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
    • G01F23/28—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
    • 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
    • G01D5/268—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 using optical fibres
    • 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
    • G01D5/347—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 using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G01D5/34715—Scale reading or illumination devices
    • G01D5/34723—Scale reading or illumination devices involving light-guides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un dispositif pour guider des ondes électromagnétiques. Dans ce dispositif servant à guider des ondes électromagnétiques à l'intérieur d'un canal creux LK de transmission de la lumière, qui produit une réflexion intérieure et retransmet un faisceau de lumière d'un émetteur LS à un récepteur LE, cet émetteur et ce récepteur sont montés aux extrémités du canal LK, qui possède une ouverture pour l'introduction d'un moyen, comme par exemple un disque perforé LO, influençant les ondes électromagnétiques. Application notamment aux capteurs tachymétriques et aux sondes de détection du niveau de remplissage de réservoirs de carburant.The invention relates to a device for guiding electromagnetic waves. In this device for guiding electromagnetic waves inside a hollow light transmission channel LK, which produces an internal reflection and retransmits a beam of light from an LS transmitter to an LE receiver, this transmitter and this receiver are mounted at the ends of the LK channel, which has an opening for the introduction of a means, such as for example a perforated disc LO, influencing the electromagnetic waves. Application in particular to tachometric sensors and to fuel tank fill level detection probes.

Description

1 26437101 2643710

Dispositif pour quider des ondes électromagnétiques L'invention concerne un dispositif pour guider les  The invention relates to a device for guiding the electromagnetic waves.

ondes électromagnétiques et comportant un canal de transmis-  electromagnetic waves and having a transmission channel

sion de la lumière, réalisant une réflexion interne.  sion of light, realizing an internal reflection.

Le canal de transmission de la lumière est réalisé  The light transmission channel is realized

de préférence en un matériau non flexible. Un dispositif éga-  preferably a non-flexible material. A device

lement possible, mais flexible, est connu d'après la demande  possible, but flexible, is known from the demand

de brevet allemand publiée sous le N 26 38 406.  German Patent Publication No. 26 38 406.

L'invention a pour but de réaliser des capteurs ou  The aim of the invention is to produce sensors or

des détecteurs à l'aide d'un canal de transmission de la lu-  detectors using a light transmission channel.

mière.Mière.

Ceci est obtenu grâce au fait qu'un émetteur de lu-  This is achieved by the fact that a transmitter of

mière et/ou un récepteur de lumière, accordés l'un sur l'au-  and / or a light receiver, one on the other

tre, sont disposés aux extrémités du canal de transmission de la lumière et que le canal de transmission de la lumière possède une ouverture pour un moyen influençant les ondes électromagnétiques. Comme émetteurs de lumière, on peut utiliser des diodes à luminescence, une lampe à incandescence ou d'autres sources de lumière. Le récepteur de lumière doit être choisi en fonction de la gamme des ondes lumineuses de l'émetteur de  are disposed at the ends of the light transmitting channel and the light transmitting channel has an opening for a means influencing the electromagnetic waves. As light emitters, luminescent diodes, an incandescent lamp or other light sources may be used. The light receiver should be selected according to the light wave range of the transmitter of the

lumière. Grâce à un guidage correspondant du canal de trans-  light. Thanks to a corresponding guidance of the trans-

mission de la lumière, on peut réaliser aussi bien des bar-  mission of light, one can realize both

rières lumineuses à embranchement que des barrières lumineu-  bridges that light barriers

ses à réflexion.his thoughts.

Pour la transmission d'informations, il est avanta-  For the transmission of information, it is

2 26437102 2643710

geux de prévoir un dispositif pénétrant dans l'ouverture pour  to provide a device penetrating the opening for

l'interruption temporaire du faisceau des ondes électromagné-  temporary interruption of the beam of electromagnetic waves

tiques. Ainsi, on peut réaliser un détecteur servant à mesu-  ticks. Thus, it is possible to realize a detector used for measuring

rer la vitesse de rotation de manière qu'un disque perforé rotatif pénètre dans l'ouverture.  Rotate the rotational speed so that a rotating perforated disk enters the opening.

On peut détecter la transparence variable de sub-  We can detect the variable transparency of sub-

stances à la lumière grâce au fait que l'ouverture peut être  stances to light thanks to the fact that the opening can be

traversée par des substances liquides ou gazeuses.  crossed by liquid or gaseous substances.

On obtient une possibilité de réalisation simple du dispositif lorsque le canal de transmission de la lumière est  We obtain a simple possibility of realization of the device when the channel of transmission of the light is

entouré par une matière plastique réfléchissante.. Pour pou-  surrounded by a reflective plastic material.

voir utiliser un matériau quelconque, il est nécessaire de former au moyen d'un dépôt par évaporation ou bien du dépôt  see using any material, it is necessary to form by means of a deposition by evaporation or deposition

d'une feuille, un revêtement intérieur du canal de transmis-  sheet, an inner lining of the transmission channel

sion de la lumière, qui réfléchit les ondes électromagnéti-  sion of light, which reflects electromagnetic waves

ques. Pour une évaluation différenciée de résultats de mesure, il est avantageux que le canal de transmission de la lumière soit subdivisé, au voisinage de l'émetteur de lumière et/ou du récepteur de lumière, en plusieurs canaux et qu'il soit également subdivisé en plusieurs canaux à partir de  c. For a differentiated evaluation of measurement results, it is advantageous that the light transmission channel is subdivided, in the vicinity of the light emitter and / or the light receiver, into several channels and that it is also subdivided into several channels from

l'émetteur de lumière ou du récepteur de lumière.  the light emitter or the light receiver.

D'autres caractéristiques et avantages de la pré-  Other features and advantages of the pre-

sente invention ressortiront de la description donnée ci-  invention will emerge from the description given below.

après prise en référence aux dessins annexés, sur lesquels:  after reference is made to the accompanying drawings, in which:

- la figure -1 représente une vue en plan de l'exem-  FIG. -1 represents a plan view of the example

ple de réalisation; et - la figure 2 représente une coupe transversale  full realization; and - Figure 2 shows a cross section

d'un canal de transmission de la lumière.  a light transmission channel.

La figure 1 représente une barrière lumineuse à em-  FIG. 1 represents a light barrier at

branchement GL comportant une- diode à luminescence comme émetteur de lumière LS et une photodiode correspondante comme  branch GL having a luminescence diode as a light emitter LS and a corresponding photodiode as

récepteur de lumière LE. L'émetteur de lumière et le récep-  LE light receiver. The light transmitter and the receiver

teur de lumière fonctionnent dans le domaine du rayonnement infrarouge et sont reliés à une unité d'évaluation du signal  light source operate in the field of infrared radiation and are connected to a signal evaluation unit

3 26437103 2643710

mesuré. La lumière est envoyée par l'émetteur de lumière LS au récepteur de lumière LE en étant guidée dans un canal LK de transmission de la lumière, qui est recourbé en forme de U. Le canal LK de transmission de la lumière peut posséder une forme et un contour quelconques. Le canal LK de transmis-  measured. The light is sent by the light emitter LS to the light receiver LE by being guided in a light transmitting channel LK, which is curved in a U-shape. The light transmitting channel LK can have a shape and shape. any outline. The LK channel of

sion de la lumière possède intérieurement une.surface réflé-  light has an inner reflective surface.

chissante. Un disque perforé L0 pénètre par une ouverture dans le canal LK de transmission de la lumière. Il est relié à un  chissante. A perforated disc L0 enters through an opening in the light transmitting channel LK. It is connected to a

arbre W, dont on mesure la vitesse de rotation. Les ouver-  W tree, which is measured speed of rotation. The opening

tures du disque perforé rotatif L0 forment, dans le récepteur  tures of the rotary perforated disk L0 form in the receiver

de lumière LE, une image lumineuse proportionnelle à la vi-  LE, a luminous image proportional to the

tesse de rotation du disque perforé L0, lorsque l'émetteur de lumière LS est branché. Cette image lumineuse est évaluée après conversion en signaux électriques. Le faisceau de  rotation speed of the perforated disc L0, when the light emitter LS is connected. This bright image is evaluated after conversion into electrical signals. The beam of

lumière est par conséquent modulé par le disque perforé L0.  light is therefore modulated by the perforated disk L0.

La figure 2 représente la coupe transversale du canal LK de transmission de la lumière comportant l'émetteur de lumière LS. Comme cela est visible, les trous du disque perforé Lo sont situés dans le trajet du rayonnement de la barrière  Fig. 2 shows the cross section of the light transmitting channel LK having the light emitter LS. As it is visible, the holes of the perforated disc Lo are located in the path of the radiation of the barrier

lumineuse à embranchement GL.light with branch GL.

Le canal LK de transmission de la lumière peut être subdivisé en deux ou plusieurs canaux de transmission de la lumière, de sorte qu'un rayonnement peut être introduit dans plusieurs canaux au moyen d'un émetteur de lumière. Il en va de même également pour le côté récepteur. Par l'ouverture, on peut également introduire des substances liquides ou gazeuses dans le canal de transmission de la lumière ou leur faire  The light transmitting channel LK can be subdivided into two or more light transmitting channels, so that radiation can be introduced into several channels by means of a light emitter. The same is true for the receiving side as well. Through the opening, it is also possible to introduce liquid or gaseous substances into the light transmission channel or to make them

traverser un petit tube transparent. En raison de la diffé-  cross a small transparent tube. Because of the difference

rence de transmission de la lumière par les substances, on  the transmission of light by substances,

peut les détecter, en particulier dans un réservoir de carbu-  can detect them, especially in a fuel tank.

rant, pour mesurer le niveau de remplissage. Le faisceau de  rant, to measure the filling level. The beam of

lumière est atténué différemment par les substances respec-  light is attenuated differently by the substances

tives.tives.

-4 2643710-4 2643710

Claims (8)

REVENDICATIONS 1. Dispositif pour guider les ondes électromagné-  1. Device for guiding electromagnetic waves tiques à l'intérieur d'un canal creux (LK) de transmission de la lumière, qui est réfléchissant intérieurement, et dans lequel il est prévu un moyen influençant les ondes électroma- gnétiques et une source de lumière (LS) et/ou un récepteur de lumière (LE), raccordés l'un sur l'autre, caractérisé par le  within a light-transmitting hollow channel (LK), which is internally reflective, and in which there is provided a means influencing the electromagnetic waves and a light source (LS) and / or a light receiver (LE), connected to each other, characterized by the fait que l'émetteur de lumière (LS) et le récepteur de lumiè-  the light emitter (LS) and the light receiver re (LE) sont disposés aux extrémités du canal (LK) de trans-  re (LE) are arranged at the ends of the channel (LK) of trans- mission de la lumière et que ce dernier possède une ouverture  mission of light and that the latter has an opening pour un moyen influençant les ondes électromagnétiques.  for a means influencing electromagnetic waves. 2. Dispositif suivant la revendication 1, caracté-  2. Device according to claim 1, characterized risé par le fait qu'il est prévu un dispositif qui pénètre dans l'ouverture et qui sert à interrompre par intervalles le  rised by the fact that there is a device which enters the opening and serves to interrupt at intervals the faisceau des ondes électromagnétiques.  beam of electromagnetic waves. 3. Dispositif suivant la revendication 2, caracté-  3. Device according to claim 2, characterized risé par le fait qu'un disque perforé rotatif (10) pénètre  rised by the fact that a rotary perforated disk (10) penetrates dans l'ouverture.in the opening. 4. Dispositif suivant la revendication 1, caracté-  4. Device according to claim 1, characterized risé par le fait que l'ouverture contient un dispositif per-  rised by the fact that the opening contains a device méable pour les ondes électromagnétiques et servant à loger  mable for electromagnetic waves and used to house des substances liquides et gazeuses.  liquid and gaseous substances. 5. Dispositif suivant l'une quelconque des revendi-  5. Device according to any one of the cations i à 4, caractérisé par le fait que le revêtement in-  cations i to 4, characterized in that the coating 26437102643710 térieur du canal (LK) de transmission de la lumière est dépo-  the interior of the light transmission channel (LK) is sé par dépôt par évaporation ou est constitué par une feuil-  evaporation deposit or consists of a film le.the. 6. Dispositif suivant l'une quelconque des revendi-  6. Device according to any one of the cations 1 à 4, caractérisé par le fait que le canal (LK) de  cations 1 to 4, characterized in that the channel (LK) of transmission de la lumière est entouré par une matière plas-  transmission of light is surrounded by a plastic material tique réfléchissante.reflective tick. 7. Dispositif suivant l'une quelconque des revendi-  7. Device according to any one of the cations 1 à 6, caractérisé par le fait que le canal (LX) de transmission de la lumière est subdivisé en plusieurs canaux au voisinage de l'émetteur de lumière (LS) et/ou du récepteur  1 to 6, characterized in that the light transmission channel (LX) is subdivided into a plurality of channels in the vicinity of the light emitter (LS) and / or the receiver. de lumière (LE).of light (LE). 8. Dispositif suivant l'une quelconque des revendi-  8. Device according to any one of the cations 1 à 6, caractérisé par le fait que le canal (LK) de transmission de la lumière est subdivisé en plusieurs canaux à partir de l'émetteur de lumière (LS) et du récepteur de  1 to 6, characterized in that the light transmitting channel (LK) is subdivided into a plurality of channels from the light emitter (LS) and lumière (LE).light (LE).
FR9002254A 1989-02-28 1990-02-23 DEVICE FOR GUIDING ELECTROMAGNETIC WAVES Pending FR2643710A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT43689A ATA43689A (en) 1989-02-28 1989-02-28 DEVICE FOR CONDUCTING ELECTROMAGNETIC SHAFTS

Publications (1)

Publication Number Publication Date
FR2643710A1 true FR2643710A1 (en) 1990-08-31

Family

ID=3490559

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9002254A Pending FR2643710A1 (en) 1989-02-28 1990-02-23 DEVICE FOR GUIDING ELECTROMAGNETIC WAVES

Country Status (3)

Country Link
AT (1) ATA43689A (en)
DE (1) DE4004728A1 (en)
FR (1) FR2643710A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113720C2 (en) * 1991-04-26 1996-01-11 Daimler Benz Ag Fork light barrier
DE4437348C2 (en) * 1994-10-19 2003-11-06 Schleicher & Co Int Ag Document shredder with a cutter and a light barrier
US6995356B2 (en) * 2002-04-11 2006-02-07 Agilent Technologies, Inc. Optical encoder device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219833A (en) * 1968-02-29 1971-01-20 Lumenition Ltd Improvements in ignition systems for internal combustion engines
FR2103683A5 (en) * 1970-07-10 1972-04-14 Ulrich Helmut
DE3630396A1 (en) * 1986-09-06 1988-03-17 Bbc Brown Boveri & Cie Arrangement for level measurement and monitoring of a liquid in a container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219833A (en) * 1968-02-29 1971-01-20 Lumenition Ltd Improvements in ignition systems for internal combustion engines
FR2103683A5 (en) * 1970-07-10 1972-04-14 Ulrich Helmut
DE3630396A1 (en) * 1986-09-06 1988-03-17 Bbc Brown Boveri & Cie Arrangement for level measurement and monitoring of a liquid in a container

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DE4004728A1 (en) 1990-08-30
ATA43689A (en) 1991-05-15

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