EP0316493B1 - Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements - Google Patents

Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements Download PDF

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Publication number
EP0316493B1
EP0316493B1 EP87402599A EP87402599A EP0316493B1 EP 0316493 B1 EP0316493 B1 EP 0316493B1 EP 87402599 A EP87402599 A EP 87402599A EP 87402599 A EP87402599 A EP 87402599A EP 0316493 B1 EP0316493 B1 EP 0316493B1
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EP
European Patent Office
Prior art keywords
permanent magnet
electromagnet
electric
indicator element
mechanic
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 - Lifetime
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EP87402599A
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German (de)
French (fr)
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EP0316493A1 (en
Inventor
Johan Van De Kamer
Claude Guittard
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Equipement Industriel Normand
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Equipement Industriel Normand
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Publication date
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Priority to DE8787402599T priority Critical patent/DE3763346D1/en
Priority to AT87402599T priority patent/ATE54031T1/en
Priority to ES87402599T priority patent/ES2016378B3/en
Priority to EP87402599A priority patent/EP0316493B1/en
Publication of EP0316493A1 publication Critical patent/EP0316493A1/en
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Publication of EP0316493B1 publication Critical patent/EP0316493B1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/10—Monitoring of the annunciator circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/30—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with rotating or oscillating members, e.g. vanes

Definitions

  • the present invention relates to a device for controlling the correct electrical and / or mechanical operation of electromagnetic type indicator elements.
  • Such an electromagnetic indicator element is mounted on a frame or mask and consists, on the one hand, of a movable part having a flap connected to a permanent magnet and pivotally mounted and, on the other hand, of an electromagnet fixed to this frame and intended to act on the permanent magnet of the movable part.
  • the permanent magnet secured to the movable flap is then positioned according to the magnetic polarity of the central core of the electromagnet and causes a rotation of the movable part of the flap in accordance with a polarity.
  • the latter In order to materialize the visual effect of such a change in position of the movable flap, the latter has a different contrast from the fixed frame or mask on which it is mounted.
  • the mobile part can, for example, be immobilized by a foreign body or be broken or even no longer exist, or even be removed from its support.
  • the electromagnet may not be energized. in all cases, this has the effect of an error on the reading of the device equipped with the indicator element, and this device must indicate or detect the fault and automatically stop the service for which the measuring instrument comprising the indicator element was designed.
  • the control device aims to solve the above problem and can also be used as a memory element making it possible to know at any time the position in which the indicator element is located.
  • the control device comprises a circuit sensitive to the magnetic field of the permanent magnet of an electromagnetic indicator element controlled by an electromagnet, this circuit comprising a magneto-resistance near the permanent magnet and being connected to an input of a comparator, another input of which is connected to the supply circuit of the electromagnet and receives information concerning the electrical polarity of the control voltage applied to the electromagnet, so that a comparator output has a first value when the permanent magnet takes a position which corresponds to that of the polarity of the control voltage and a second value when the permanent magnet is not present or does not take said position indicating thus a mechanical and / or electrical failure of the indicator element, said comparator output being connected to an electronic processing device ent of these values making it possible, for example, to stop a counting device connected to the indicating element in the event of both mechanical and electrical failure of the latter.
  • the supply circuit of the electromagnet is connected to the terminals of a device for controlling the electrical operation of the supply circuit itself connected to the electronic processing device, so that a fault in the electrical supply of the electromagnet creates a signal of electrical failure of the indicator element acting on said processing device.
  • control device can be used as a memory element and is, in particular, applicable for detecting the position in which the indicator element is located after a lack of electrical supply to this last, the electromagnet retaining a remanent magnetization acting on the permanent magnet for controlling the shutter, the position of which is thus known before the momentary stopping of the supply.
  • the control device of the invention is also applicable for restarting a stopped computer system, after resetting the position information of the indicating element.
  • Figs. 1 a and 1 b schematically show an indicator element in the display position and, respectively, in the erase position.
  • Fig. 2 is a block diagram of the control device according to the invention for the correct electrical and mechanical operation of the indicator element of FIGS. 1a and 1b.
  • an electromagnetic indicator element 1 mounted in the frame 2 of a display.
  • the electromagnetic indicator 1 comprises a movable part 3 pivoting about an axis 4 and having a flap 5 provided with a digital indication of a type suitable for the display and is in the display position in FIG. 1a and in the erasing position in FIG. 19.
  • the movable part 3 also includes a small permanent magnet 6 mounted in such a way that one of its poles, for example the north pole, is arranged opposite the flap relative to the pivot axis 4.
  • an electromagnet 7 Opposite the movable part 3 is mounted an electromagnet 7, the central magnetic core 8 of which is coaxial with an axis passing through the pivot 4 and the north pole of the permanent magnet 6 in the display position of FIG. 1a.
  • the electromagnet 7 is mounted on a plate 9 secured to the frame 2 of the display and has two studs connection 10 connected to a control amplifier 11 (fig. 2).
  • the mobile part 3 will pivot to bring its south pole S in front of the north pole of the central core 8 of the electromagnet 7 (fig. 1 b).
  • the flap 5 of the movable part 3 is then in the erasing position relative to the fixed frame or mask 2 of the display.
  • the movable flap In order to concretize the visual effect of the change of position of the movable flap relative to the fixed frame, the movable flap is of a different color from the frame or has a certain contrast with respect to the latter.
  • the present invention relates more particularly to the verification of the proper mechanical and electrical operation of a display constituted by electromagnetic indicator elements of the above type so as to verify whether the shutter is in the correct position when applied to electro - magnetizing a current pulse of given polarity.
  • FIG. 2 which shows a block diagram of the control device according to the invention for the correct electrical and mechanical operation of indicator elements of the type shown in FIGS. 1a and 1b, there is shown diagrammatically the whole of the indicator element with the same references as in FIGS. 1 a and 1 b.
  • the movable part 3 which carries the permanent magnet 6 and the flap 5 normally takes the position in solid line (display position) or the position in dashed lines (erasing position) relative to the frame or mask 2.
  • a magneto-resistance 12 is placed in front of the permanent magnet 6 for example in the display position of FIG. 1a, and this magneto-resistance is connected, by a shaping amplifier 13, to the first input 14a of a gate AND of a comparator 15.
  • the AND gate 14 receives on its second input 14b, via of a circuit 16, information relating to the polarity of the control pulse of the electromagnet, polarity which is also applied to the control amplifier 11 of the electromagnet 7.
  • the input 14a of the AND gate 14 which is connected to the shaping amplifier 13 is also connected to an electronic device 17 for processing the application which also receives the output of the AND gate on another input.
  • the electronic processing device 17 is provided for controlling the service of the measuring instrument comprising the indicator element of FIGS. la and 1b and stop it in case of failure of the latter.
  • the output of the electronic processing device 17 is connected in 15c to the comparator 15 and via the circuit 16 to the control amplifier 11; it allows, as we saw above, to apply a pulse of polarity given to the electromagnet 7.
  • the permanent magnet 6 of the movable flap takes one of the positions shown in the drawing, and this position is detected by the circuit of the magneto-resistance 12 which, by Hall effect , thus allows the position of the mobile part 3 to be known by measuring the polarity of the permanent magnet 6.
  • the first input 14a of the AND gate 14 of the comparator 15 receives information different from that applied by circuit 16 to its second input 14b. Fault information then appears at the output of the AND gate 14 on the electronic device 17 for processing the application, which then generates a corresponding signal making it possible to stop by the system using the indicator element whose failure has been detected.
  • the comparator 15 gives, first of all, information on the position of the permanent magnet on its output 15a connected to the shaping amplifier 13.
  • the comparator 15 gives, on the other hand, the output 15b of gate AND 14 a first value when the permanent magnet takes a position which corresponds to that of the polarity of the control voltage and a second value when the permanent magnet is not present or does not take said position thus indicating a mechanical failure of the corresponding indicating element.
  • the device of the invention is thus more particularly designed to detect a mechanical failure of the indicator element.
  • control device relates to the possibility of being able to know at any time the position in which the flap 5 of the indicator element is located, which is advantageous for example after a momentary absence of supply. electromagnet 7.
  • the mobile part 3 retains its position and the control device according to the invention makes it possible to know this position by the information leaving at 15a from the comparator 15.
  • indicator element 1 then plays the role of a readable memory.
  • the indicator element thus controlled by the control device is associated with a microcomputer or computer system which would, for whatever reason, be stopped.
  • the system can then resume after resetting the positioning information of the indicating element in order to be able to leave with the indications present before the event that produced the system shutdown.
  • control device can be used not only as a fault detector but also as a memory element.
  • Fig. 2 also shows a device 18 which is placed at the terminals of the control amplifier 11 and makes it possible to detect the correct electrical operation of this amplifier as well as in general of the entire electrical circuit of the indicating element.
  • the electrical operation control device 18 is connected to the electronic application processing device 17 which by line 19 makes it possible to send an electrical test command signal and by line 20 makes it possible to receive the result of the test and thus detect a break in the electrical circuit of the detector.
  • the electronic device 17 automatically stops the service for which the measuring instrument comprising the indicating element was designed, in the same way as previously in the case of a mechanical failure of the element indicator.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Push-Button Switches (AREA)

Abstract

1. A device for monitoring the proper electric and/or mechanic functioning of electromagnetic type indicator elements, characterized in that it includes a circuit (12, 13) which is sensitive to the magnetic field of the permanent magnet (6) of an electromagnetic indicator element (1) controlled by an electromagnet (7), this circuit including a magnetoresistor (12) adjacent the permanent magnet (6) and connected to an input (14a) of a comparator (15) another input (15c) of which is connected to the electromagnet (7) feeding circuit (11), and receives an information regarding the electric polarity of the control voltage applied to the electromagnet (7), so that an output (15b) of the comparator has a first value when the permanent magnet (6) occupies a position corresponding to that of the control voltage polarity, and a second value when the permanent magnet is not present or does not occupy said position, thus indicating a mechanic and/or electric failure of the indicator element, said comparator output being applied to a treatment electronic device (17) of these values allowing, for example, to stop a counting member connected to the indicator element in the event of a mechanic and/or electric failure of the latter.

Description

La présente invention concerne un dispositif de contrôle du bon fonctionnement électrique et/ou mécanique d'éléments indicateurs de type électromagnétique.The present invention relates to a device for controlling the correct electrical and / or mechanical operation of electromagnetic type indicator elements.

Un tel élément indicateur électromagnétique est monté sur un bâti ou masque et est constitué, d'une part, d'une partie mobile présentant un volet relié à un aimant permanent et montée pivotante et, d'autre part, d'un électro-aimant fixé à ce bâti et prévu pour agir sur l'aimant permanent de la partie mobile.Such an electromagnetic indicator element is mounted on a frame or mask and consists, on the one hand, of a movable part having a flap connected to a permanent magnet and pivotally mounted and, on the other hand, of an electromagnet fixed to this frame and intended to act on the permanent magnet of the movable part.

Lorsqu'on applique une impulsion de courant continu sur le bobinage d'un électro-aimant, son noyau central garde, suivant la polarité de l'impulsion appliquée, un magnétisme rémanent de polarité imposée par cette impulsion.When a direct current pulse is applied to the winding of an electromagnet, its central core retains, according to the polarity of the applied pulse, a remanent magnetism of polarity imposed by this pulse.

L'aimant permanent solidaire du volet mobile se positionne alors selon la polarité magnétique du noyau central de l'électro-aimant et provoque une rotation de la partie mobile du volet en accord avec une polarité.The permanent magnet secured to the movable flap is then positioned according to the magnetic polarity of the central core of the electromagnet and causes a rotation of the movable part of the flap in accordance with a polarity.

Afin de concrétiser l'effet visuel d'un tel changement de position du volet mobile, ce dernier présente un contraste différent du bâti fixe ou masque sur lequel il est monté.In order to materialize the visual effect of such a change in position of the movable flap, the latter has a different contrast from the fixed frame or mask on which it is mounted.

Lors de la commande électrique de l'élément indicateur, une incertitude existe sur le bon fonctionnement tant électrique que mécanique de la partie mobile de l'élément indicateur. La partie mobile peut, par exemple, être immobilisée par un corps étranger ou être cassée ou encore ne plus exister, voire être ôtée de son support. De même, l'électro-aimant peut ne pas être alimenté. dans tous les cas, ceci a pour effet une erreur sur la lecture du dispositif équipé de l'élément indicateur, et ce dispositif doit indiquer ou détecter le défaut et arrêter automatiquement le service pour lequel l'instrument de mesure comprenant l'élément indicateur était conçu.When electrically controlling the indicating element, there is uncertainty as to the correct electrical and mechanical functioning of the moving part of the indicating element. The mobile part can, for example, be immobilized by a foreign body or be broken or even no longer exist, or even be removed from its support. Likewise, the electromagnet may not be energized. in all cases, this has the effect of an error on the reading of the device equipped with the indicator element, and this device must indicate or detect the fault and automatically stop the service for which the measuring instrument comprising the indicator element was designed.

Le dispositif de contrôle conforme à l'invention vise à résoudre le problème ci-dessus et peut également être utilisé en tant qu'élément mémoire permettant de connaître à tout moment la position dans laquelle se trouve l'élément indicateur.The control device according to the invention aims to solve the above problem and can also be used as a memory element making it possible to know at any time the position in which the indicator element is located.

Il est connu du document GB-A 2 135 799 de contrôler le bon fonctionnement d'un interrupteur électromagnétique ou d'un indicateur électrique par un circuit magnéto-résistive près d'un électro-aimant additionel.It is known from document GB-A 2 135 799 to control the proper functioning of an electromagnetic switch or an electrical indicator by a magneto-resistive circuit near an additional electromagnet.

Conformément à l'invention, le dispositif de contrôle comprend un circuit sensible au champ magnétique de l'aimant permanent d'un élément indicateur électromagnétique commandé par un électro-aimant, ce circuit comprenant une magnéto-résistance à proximité de l'aimant permanent et étant relié à une entrée d'un comparateur dont une autre entrée est reliée au circuit d'alimentation de l'électro-aimant et reçoit une information concernant la polarité électrique de la tension de commande appliquée à l'électro-aimant, de sorte qu'une sortie du comparateur présente une première valeur lorsque l'aimant permanent prend une position qui correspond à celle de la polarité de la tension de commande et une seconde valeur lorsque l'aimant permanent n'est pas présent ou ne prend pas ladite position indiquant ainsi une défaillance mécanique et/ou électrique de l'élément indicateur, ladite sortie du comparateur étant reliée à un dispositif électronique de traitement de ces valeurs permettant, par exemple, d'arrêter un organe de comptage relié à l'élément indicateur en cas de défaillance tant mécanique qu'électrique de ce dernier.According to the invention, the control device comprises a circuit sensitive to the magnetic field of the permanent magnet of an electromagnetic indicator element controlled by an electromagnet, this circuit comprising a magneto-resistance near the permanent magnet and being connected to an input of a comparator, another input of which is connected to the supply circuit of the electromagnet and receives information concerning the electrical polarity of the control voltage applied to the electromagnet, so that a comparator output has a first value when the permanent magnet takes a position which corresponds to that of the polarity of the control voltage and a second value when the permanent magnet is not present or does not take said position indicating thus a mechanical and / or electrical failure of the indicator element, said comparator output being connected to an electronic processing device ent of these values making it possible, for example, to stop a counting device connected to the indicating element in the event of both mechanical and electrical failure of the latter.

Selon une autre caractéristique de la présente invention, le circuit d'alimentation de l'électro-aimant est relié aux bornes d'un dispositif de contrôle du fonctionnement électrique du circuit d'alimentation lui-même relié au dispositif électronique de traitement, de sorte qu'un défaut d'alimentation électrique de l'électro-aimant crée un signal de défaillance électrique de l'élément indicateur agissant sur ledit dispositif de traitement.According to another characteristic of the present invention, the supply circuit of the electromagnet is connected to the terminals of a device for controlling the electrical operation of the supply circuit itself connected to the electronic processing device, so that a fault in the electrical supply of the electromagnet creates a signal of electrical failure of the indicator element acting on said processing device.

Selon encore une autre caractéristique de l'invention, le dispositif de contrôle peut être utilisé en tant qu'élément mémoire et est, notamment, applicable pour détecter la position dans laquelle se trouve l'élément indicateur après une absence d'alimentation électrique de ce dernier, l'électro-aimant gardant une magnétisation rémanente agissant sur l'aimant permanent de commande du volet dont est ainsi connue la position antérieure à l'arrêt momentané de l'alimentation. Le dispositif de contrôle de l'invention est également applicable pour faire repartir un système informatique arrêté, après réinitialisation des informations de position de l'élément indicateur.According to yet another characteristic of the invention, the control device can be used as a memory element and is, in particular, applicable for detecting the position in which the indicator element is located after a lack of electrical supply to this last, the electromagnet retaining a remanent magnetization acting on the permanent magnet for controlling the shutter, the position of which is thus known before the momentary stopping of the supply. The control device of the invention is also applicable for restarting a stopped computer system, after resetting the position information of the indicating element.

Diverses autres caractéristiques de l'invention ressortent d'ailleurs de la description détaillée qui suit.Various other characteristics of the invention will also emerge from the detailed description which follows.

Une forme de réalisation de l'objet de l'invention est représentée, à titre d'exemple non limitatif, au dessin annexé.An embodiment of the object of the invention is shown, by way of nonlimiting example, in the accompanying drawing.

Les fig. 1 a et 1 b montrent schématiquement un élément indicateur en position d'affichage et, respectivement, en position d'effacement.Figs. 1 a and 1 b schematically show an indicator element in the display position and, respectively, in the erase position.

La fig. 2 est un schéma synoptique de principe du dispositif de contrôle conforme à l'invention du bon fonctionnement électrique et mécanique de l'élément indicateur des fig. 1a et 1b.Fig. 2 is a block diagram of the control device according to the invention for the correct electrical and mechanical operation of the indicator element of FIGS. 1a and 1b.

Aux fig. 1 a et 1 b, on a représenté de manière schématique un élément indicateur électromagnétique 1 monté dans le bâti 2 d'un afficheur. L'indicateur électromagnétique 1 comprend une partie mobile 3 pivotant autour d'un axe 4 et présentant un volet 5 muni d'une indication numérique de type approprié à l'afficheur et se présente en position d'affichage à la fig. 1a et en position d'effacement à la fig. 19.In fig. 1 a and 1 b, there is shown schematically an electromagnetic indicator element 1 mounted in the frame 2 of a display. The electromagnetic indicator 1 comprises a movable part 3 pivoting about an axis 4 and having a flap 5 provided with a digital indication of a type suitable for the display and is in the display position in FIG. 1a and in the erasing position in FIG. 19.

La partie mobile 3 comprend également un petit aimant permanent 6 monté de telle manière qu'un de ses pôles, par exemple le pôle nord, soit disposé à l'opposé du volet par rapport à l'axe de pivotement 4.The movable part 3 also includes a small permanent magnet 6 mounted in such a way that one of its poles, for example the north pole, is arranged opposite the flap relative to the pivot axis 4.

En face de la partie mobile 3 est monté un électro-aimant 7 dont le noyau central magnétique 8 est coaxial à un axe passant par le pivot 4 et le pôle nord de l'aimant permanent 6 dans la position d'affichage de la fig. 1a.Opposite the movable part 3 is mounted an electromagnet 7, the central magnetic core 8 of which is coaxial with an axis passing through the pivot 4 and the north pole of the permanent magnet 6 in the display position of FIG. 1a.

L'électro-aimant 7 est monté sur une plaque 9 solidaire du bâti 2 de l'afficheur et présente deux plots de connexion 10 reliés à un amplificateur de commande 11 (fig. 2).The electromagnet 7 is mounted on a plate 9 secured to the frame 2 of the display and has two studs connection 10 connected to a control amplifier 11 (fig. 2).

Lorsqu'une impulsion de courant continu de polarité donnée est appliquée aux plots de l'électro-aimant 7, et si l'on suppose que, lors de l'application de cette polarité électrique, le noyau central 8 présente un magnétisme rémanent tel que la polarité magnétique du noyau magnétique 8 en face de l'aimant permanent 6 de la partie mobile est un pôle sud, alors la partie mobile 3 prendra la position indiquée à la fig. 1a.When a direct current pulse of given polarity is applied to the pads of the electromagnet 7, and if it is assumed that, during the application of this electrical polarity, the central core 8 has a remanent magnetism such that the magnetic polarity of the magnetic core 8 opposite the permanent magnet 6 of the mobile part is a south pole, then the mobile part 3 will take the position indicated in fig. 1a.

Au contraire, si la polarité de l'impulsion de courant continu appliquée aux plots 10 de l'électro-aimant par l'amplificateur de commande 11 est telle qu'un pôle nord se développe en face de l'aimant permanent 6, alors la partie mobile 3 pivotera pour amener son pôle sud S devant le pôle nord du noyau central 8 de l'électro-aimant 7 (fig. 1 b). Le volet 5 de la partie mobile 3 se trouve alors dans la position d'effacement par rapport au bâti fixe ou masque 2 de l'afficheur.On the contrary, if the polarity of the direct current pulse applied to the pads 10 of the electromagnet by the control amplifier 11 is such that a north pole develops opposite the permanent magnet 6, then the mobile part 3 will pivot to bring its south pole S in front of the north pole of the central core 8 of the electromagnet 7 (fig. 1 b). The flap 5 of the movable part 3 is then in the erasing position relative to the fixed frame or mask 2 of the display.

Afin de concrétiser l'effet visuel du changement de position du volet mobile par rapport au bâti fixe, le volet mobile est d'une couleur différente du bâti ou présente un certain contraste par rapport à ce dernier.In order to concretize the visual effect of the change of position of the movable flap relative to the fixed frame, the movable flap is of a different color from the frame or has a certain contrast with respect to the latter.

La présente invention concerne plus particulièrement la vérification du bon fonctionnement mécanique et électrique d'un afficheur constitué par des éléments indicateurs électromagnétiques du type ci-dessus de manière à vérifier si le volet prend bien la position prévue lorsque l'on applique à l'électro-aimant une impulsion de courant de polarité donnée.The present invention relates more particularly to the verification of the proper mechanical and electrical operation of a display constituted by electromagnetic indicator elements of the above type so as to verify whether the shutter is in the correct position when applied to electro - magnetizing a current pulse of given polarity.

A la fig. 2 qui représente un schéma synoptique de principe du dispositif de contrôle selon l'invention du bon fonctionnement électrique et mécanique d'éléments indicateurs du type représenté aux fig. 1a et 1 b, on a représenté schématiquement l'ensemble de l'élément indicateur avec les mêmes références qu'aux fig. 1 a et 1 b.In fig. 2 which shows a block diagram of the control device according to the invention for the correct electrical and mechanical operation of indicator elements of the type shown in FIGS. 1a and 1b, there is shown diagrammatically the whole of the indicator element with the same references as in FIGS. 1 a and 1 b.

Comme on l'a vu plus haut et selon la polarité magnétique du noyau 8 de l'électro-aimant 7 créée par l'intermédiaire de l'amplificateur de commande 11, la partie mobile 3 qui porte l'aimant permanent 6 et le volet 5 prend, normalement, la position en trait plein (position d'affichage) ou la position en traits mixtes (position d'effacement) par rapport au bâti ou masque 2.As we have seen above and according to the magnetic polarity of the core 8 of the electromagnet 7 created by means of the control amplifier 11, the movable part 3 which carries the permanent magnet 6 and the flap 5 normally takes the position in solid line (display position) or the position in dashed lines (erasing position) relative to the frame or mask 2.

De manière à détecter le déplacement de l'aimant permanent 6, une magnéto-résistance 12 est placée devant l'aimant permanent 6 par exemple dans la position d'affichage de la fig. 1a, et cette magnéto-résistance est reliée, par un amplificateur de mise en forme 13, à la première entrée 14a d'une porte ET d'un comparateur 15. La porte ET 14 reçoit sur sa seconde entrée 14b, par l'intermédiaire d'un circuit 16, une information relative à la polarité de l'impulsion de commande de l'électro-aimant, polarité qui est aussi appliquée à l'amplificateur de commande 11 de l'électro-aimant 7.In order to detect the displacement of the permanent magnet 6, a magneto-resistance 12 is placed in front of the permanent magnet 6 for example in the display position of FIG. 1a, and this magneto-resistance is connected, by a shaping amplifier 13, to the first input 14a of a gate AND of a comparator 15. The AND gate 14 receives on its second input 14b, via of a circuit 16, information relating to the polarity of the control pulse of the electromagnet, polarity which is also applied to the control amplifier 11 of the electromagnet 7.

L'entrée 14a de la porte ET 14 qui est reliée à l'amplificateur de mise en forme 13 est également reliée à un dispositif électronique 17 de traitement de l'application qui reçoit aussi sur une autre entrée la sortie de la porte ET. Le dispositif électronique de traitement 17 est prévu pour commander le service de l'instrument de mesure comprenant l'élément indicateur des fig. la et 1b et l'arrêter en cas de défaillance de ce dernier.The input 14a of the AND gate 14 which is connected to the shaping amplifier 13 is also connected to an electronic device 17 for processing the application which also receives the output of the AND gate on another input. The electronic processing device 17 is provided for controlling the service of the measuring instrument comprising the indicator element of FIGS. la and 1b and stop it in case of failure of the latter.

La sortie du dispositif électronique de traitement 17 est reliée en 15ç au comparateur 15 et par l'intermédiaire du circuit 16 à l'amplificateur de commande 11 ; il permet, comme on l'a vu plus haut, d'appliquer une impulsion de polarité donnée à l'électro-aimant 7.The output of the electronic processing device 17 is connected in 15c to the comparator 15 and via the circuit 16 to the control amplifier 11; it allows, as we saw above, to apply a pulse of polarity given to the electromagnet 7.

Selon la polarité ainsi appliquée à l'électro-aimant 7, l'aimant permanent 6 du volet mobile prend l'une des positions représentées au dessin, et cette position est détectée par le circuit de la magnéto-résistance 12 qui, par effet Hall, permet ainsi de connaître la position de la partie mobile 3 en mesurant la polarité de l'aimant permanent 6.According to the polarity thus applied to the electromagnet 7, the permanent magnet 6 of the movable flap takes one of the positions shown in the drawing, and this position is detected by the circuit of the magneto-resistance 12 which, by Hall effect , thus allows the position of the mobile part 3 to be known by measuring the polarity of the permanent magnet 6.

Ainsi, au cas où la partie mobile 3 est immobilisée par un corps étranger ou est cassée ou encore n'existe plus, voire est ôtée de son support, la première entrée 14a de la porte ET 14 du comparateur 15 reçoit une information différente de celle appliquée par le circuit 16 sur sa seconde entrée 14b. Une information de défaut apparaît alors en sortie de la porte ET 14 sur le dispositif électronique 17 de traitement de l'application qui engendre alors un signal correspondant permettant d'arrêter par le système utilisant l'élément indicateur dont la défaillance a été détectée.Thus, in the case where the mobile part 3 is immobilized by a foreign body or is broken or still no longer exists, or is even removed from its support, the first input 14a of the AND gate 14 of the comparator 15 receives information different from that applied by circuit 16 to its second input 14b. Fault information then appears at the output of the AND gate 14 on the electronic device 17 for processing the application, which then generates a corresponding signal making it possible to stop by the system using the indicator element whose failure has been detected.

On voit ainsi que le comparateur 15 donne, tout d'abord, une information de position de l'aimant permanent sur sa sortie 15a reliée à l'amplificateur de mise en forme 13. Le comparateur 15 donne, d'autre part, à la sortie 15b de la porte ET 14 une première valeur lorsque l'aimant permanent prend une position qui correspond à celle de la polarité de la tension de commande et une seconde valeur lorsque l'aimant permanent n'est pas présent ou ne prend pas ladite position indiquant ainsi une défaillance mécanique de l'élément indicateur correspondant.It can thus be seen that the comparator 15 gives, first of all, information on the position of the permanent magnet on its output 15a connected to the shaping amplifier 13. The comparator 15 gives, on the other hand, the output 15b of gate AND 14 a first value when the permanent magnet takes a position which corresponds to that of the polarity of the control voltage and a second value when the permanent magnet is not present or does not take said position thus indicating a mechanical failure of the corresponding indicating element.

Le dispositif de l'invention est ainsi plus particulièrement conçu pour détecter une défaillance mécanique de l'élément indicateur.The device of the invention is thus more particularly designed to detect a mechanical failure of the indicator element.

Un autre avantage du dispositif de contrôle conforme à l'invention concerne toutefois la possibilité de pouvoir connaître à tout moment la position dans laquelle se trouve le volet 5 de l'élément indicateur, ce qui est intéressant par exemple après une absence momentanée d'alimentation électrique de l'électro-aimant 7.Another advantage of the control device according to the invention however relates to the possibility of being able to know at any time the position in which the flap 5 of the indicator element is located, which is advantageous for example after a momentary absence of supply. electromagnet 7.

Dans un tel cas en effet, du fait du magnétisme rémanent du noyau 8, la partie mobile 3 conserve sa position et le dispositif de contrôle selon l'invention permet de connaître cette position par l'information sortant en 15a du comparateur 15. L'élément indicateur 1 joue alors le rôle d'une mémoire pouvant être relue.In such a case, in fact, due to the remanent magnetism of the core 8, the mobile part 3 retains its position and the control device according to the invention makes it possible to know this position by the information leaving at 15a from the comparator 15. indicator element 1 then plays the role of a readable memory.

Un autre cas intéressant est celui dans lequel l'élément indicateur ainsi commandé par le dispositif de contrôle est associé à un système micro-informatique ou informatique qui serait pour une raison quelconque arrêté. Le système peut alors reprendre après une réinitialisation des informations de positionnement de l'élément indicateur afin de pouvoir repartir avec les indications présentes avant l'événement ayant produit l'arrêt du système.Another interesting case is that in which the indicator element thus controlled by the control device is associated with a microcomputer or computer system which would, for whatever reason, be stopped. The system can then resume after resetting the positioning information of the indicating element in order to be able to leave with the indications present before the event that produced the system shutdown.

On voit donc que le dispositif de contrôle selon l'invention peut être utilisé non seulement en tant que détecteur de défaut mais aussi en tant qu'élément mémoire.It can therefore be seen that the control device according to the invention can be used not only as a fault detector but also as a memory element.

La fig. 2 représente également un dispositif 18 qui est placé aux bornes de l'amplificateur de commande 11 et permet de détecter le bon fonctionnement électrique de cet amplificateur ainsi qu'en général de tout le circuit électrique de l'élément indicateur. A cet effet, le dispositif de contrôle du fonctionnement électrique 18 est relié au dispositif électronique de traitement de l'application 17 qui par la ligne 19 permet d'envoyer un signal électrique de commande de test et par la ligne 20 permet de recevoir le résultat du test et de détecter ainsi une coupure dans le circuit électrique du détecteur. Dans le cas d'une telle coupure, le dispositif électronique 17 arrête automatiquement le service pour lequel était conçu l'instrument de mesure comprenant l'élément indicateur, de la même façon que précédemment dans le cas d'une défaillance mécanique de l'élément indicateur.Fig. 2 also shows a device 18 which is placed at the terminals of the control amplifier 11 and makes it possible to detect the correct electrical operation of this amplifier as well as in general of the entire electrical circuit of the indicating element. For this purpose, the electrical operation control device 18 is connected to the electronic application processing device 17 which by line 19 makes it possible to send an electrical test command signal and by line 20 makes it possible to receive the result of the test and thus detect a break in the electrical circuit of the detector. In the event of such a cut, the electronic device 17 automatically stops the service for which the measuring instrument comprising the indicating element was designed, in the same way as previously in the case of a mechanical failure of the element indicator.

Claims (6)

1. A device for monitoring the proper electric and/or mechanic functioning of electromagnetic type indicator elements, characterized in that it includes a circuit (12, 13) which is sensitive to the magnetic field of the permanent magnet (6) of an electromagnetic indicator element (1) controlled by an electromagnet (7), this circuit including a magnetoresistor (12) adjacent the permanent magnet (6) and connected to an input (14a) of a comparator (15) another input (15c) of which is connected to the electromagnet (7) feeding circuit (11), and receives an information regarding the electric polarity of the control voltage applied to the electromagnet (7), so that an output (15b) of the comparator has a first value when the permanent magnet (6) occupies a position corresponding to that of the control voltage polarity, and a second value when the permanent magnet is not present or does not occupy said position, thus indicating a mechanic and/or electric failure of the indicator element, said comparator output being applied to a treatment electronic device (17) of these values allowing, for example, to stop a counting member connected to the indicator element in the event of a mechanic and/or electric failure of the latter.
2. A monitoring device according to claim 1, characterized in that the electromagnet feeding circuit (11) is connected to the terminals of a monitoring device (18) of the electric functioning of the feeding circuit which is in turn connected to the treatment electronic device, so that an electric feeding failure of the electromagnet creates an electric failure signal of the indicator element acting on said treatment device.
3. A monitoring device according to one of claims 1 or 2, characterized in that the output of circuit (12, 13) is directly connected at (15a) to the treatment electronic device (17) for providing an information relating to the position of the permanent magnet (6) of the indicator element (1).
4. A monitoring device according to one of claims 1 to 3, characterized in that it is used as a memory element.
5. A monitoring device according to one of claims 1 to 4, characterized in that it is applicable for detecting the position in which the indicator element is after an absence of electric feed of the latter.
6. A monitoring device according to one of claims 1 to 5, characterized in that is allows restarting a data processing system which has stopped, after reinitialization of the position informations of the indicator element.
EP87402599A 1987-11-18 1987-11-18 Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements Expired - Lifetime EP0316493B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787402599T DE3763346D1 (en) 1987-11-18 1987-11-18 DEVICE FOR MONITORING THE GOOD ELECTRICAL AND / OR MECHANICAL FUNCTIONING OF DISPLAY ELEMENTS OF THE ELECTRO-MAGNETIC TYPE.
AT87402599T ATE54031T1 (en) 1987-11-18 1987-11-18 DEVICE FOR MONITORING THE GOOD ELECTRICAL AND/OR MECHANICAL FUNCTIONING OF INDICATOR ELEMENTS OF THE ELECTROMAGNETIC TYPE.
ES87402599T ES2016378B3 (en) 1987-11-18 1987-11-18 CONTROL DEVICE FOR THE GOOD ELECTRICAL AND / OR MECHANICAL OPERATION OF ELECTROMAGNETIC TYPE INDICATOR ELEMENTS.
EP87402599A EP0316493B1 (en) 1987-11-18 1987-11-18 Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87402599A EP0316493B1 (en) 1987-11-18 1987-11-18 Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements

Publications (2)

Publication Number Publication Date
EP0316493A1 EP0316493A1 (en) 1989-05-24
EP0316493B1 true EP0316493B1 (en) 1990-06-20

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EP87402599A Expired - Lifetime EP0316493B1 (en) 1987-11-18 1987-11-18 Device for monitoring the proper electric and/or mechanic functioning of electro-magnetic-type indicator elements

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EP (1) EP0316493B1 (en)
AT (1) ATE54031T1 (en)
DE (1) DE3763346D1 (en)
ES (1) ES2016378B3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200156A1 (en) * 1991-10-04 1993-04-08 Duerrwaechter E Dr Doduco DEVICE FOR DETERMINING THE STRENGTH OF A MAGNETIC FIELD
DE9411459U1 (en) * 1994-07-15 1994-09-22 Veba Kraftwerke Ruhr Ag, 45896 Gelsenkirchen Device for the optical display and storage of error messages
US5642130A (en) * 1995-01-17 1997-06-24 Mark Iv Industries Limited Display array and power control circuit
FR2825156B1 (en) * 2001-05-28 2003-07-25 Valeo Vision DEVICE FOR DETECTING THE CONDITION OF AN ELECTROMAGNET
CN109708568A (en) * 2018-12-04 2019-05-03 天津津航技术物理研究所 A kind of signal processing apparatus for hall device angle detection system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025512A (en) * 1959-07-01 1962-03-13 Gen Railway Signal Co Changeable indicators for display devices
IT1169167B (en) * 1983-02-15 1987-05-27 Gd Spa FUNCTIONAL CONTROL SYSTEM FOR OUTPUT TRANSDUCERS OF A CENTRAL CONTROL AND CONTROL UNIT FOR MACHINES AND / OR DEVICES USABLE IN PRODUCTION AND / OR PACKAGING LINES OF PRODUCTS

Also Published As

Publication number Publication date
ATE54031T1 (en) 1990-07-15
ES2016378B3 (en) 1990-11-01
DE3763346D1 (en) 1990-07-26
EP0316493A1 (en) 1989-05-24

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