EP0509920B1 - Position signalling device of a movable component - Google Patents

Position signalling device of a movable component Download PDF

Info

Publication number
EP0509920B1
EP0509920B1 EP92401059A EP92401059A EP0509920B1 EP 0509920 B1 EP0509920 B1 EP 0509920B1 EP 92401059 A EP92401059 A EP 92401059A EP 92401059 A EP92401059 A EP 92401059A EP 0509920 B1 EP0509920 B1 EP 0509920B1
Authority
EP
European Patent Office
Prior art keywords
circuit
pulses
input
inverter
output
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
Application number
EP92401059A
Other languages
German (de)
French (fr)
Other versions
EP0509920A1 (en
Inventor
Gérard Ebersohl
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0509920A1 publication Critical patent/EP0509920A1/en
Application granted granted Critical
Publication of EP0509920B1 publication Critical patent/EP0509920B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres

Definitions

  • the present invention as defined in the claims relates to a device to signal the position of a movable member.
  • the example relates to the signaling of the position of the contacts of a power cut-off device electrical, such as a circuit breaker. It is essential to the operator of a substation with devices such as circuit breakers, to know with certainty the state, open or closed, of the position of contacts of each of the circuit breakers; this information, generally available at each of the circuit breakers, is centralized in a control station and control; it is imperative that any failure of the information transmission circuit which connects each of the audit devices are immediately reported, without what the signal received at the station can make believe that a device is in a given state while it is in the reverse state; this error can cause unfortunate consequences for the network operator electric.
  • the problem is not limited to the detection of the position of the contacts of a circuit breaker; in electrical substations, this signaling, called also signal contact, relates to pressure switches, oil pressure of the hydraulic control circuits, oil levels, etc.
  • An object of the invention is therefore to produce a device for signaling the status of a device by detecting this state and transmitting the corresponding information, which is of a functioning without possible error on the detected state, and which signals immediately his own failure as well as that of the information transmission line.
  • Another object of the invention is to provide a device insensitive to external influences such as electric fields or magnetic fields as well than common mode disturbances encountered when uses galvanic connections.
  • Another object of the invention is therefore to make a device that does not require operating no more energy than that available by means of a photovoltaic cell.
  • U.S. Patent No. 4,626,621 it is describes a circuit for determining the position of an object, comprising two LR circuits attacked by a square signal from a pulse generator.
  • One of the LR circuits has a fixed inductor, the other a inductor variable depending on the position of the object.
  • the establishment of voltages in the circuits is done, from a moment t1, according to different exponential laws in two circuits, and we measure the respective times t2 and t3 corresponding to the establishment on the two circuits of a voltage of given value Vo.
  • the report (t3 - t1) / (t2 - t1) provides a value corresponding to the position sought.
  • Such a circuit is complex since it includes two LR circuits, two operational amplifiers, two counters, etc., and it cannot detect its own failures.
  • An object of the invention is to provide a circuit with the minimum of components, and, as it already has been indicated, able to report its own failures.
  • Document EP-A-0 272 750 teaches means for converting electrical pulses into optical pulses and means such as an optical fiber for transmitting these pulses to a processing center.
  • said first means comprises a circuit for developing rectangular pulses of constant and separate duration by equal time intervals, an integrating circuit receiving said pulses, a first inverter circuit with threshold receiving the output signals from the integrator and providing as output calibrated pulses, a circuit with time constant comprising a resistance and said inductance, the output signal of said first circuit threshold inverter being sent both to the input of said time constant circuit and on a second inverter circuit, the circuit output signals to time constant and the second inverter circuit being addressed to the input of a third inverter circuit to threshold whose output is connected to an amplifier feeding said second means.
  • said second means is a photo-diode.
  • Said processing center includes a circuit for demodulation and a self-monitoring circuit.
  • said demodulation circuit includes a converter photovoltaic receiving signal from said fiber optics, a Schmitt trigger and a type circuit MEMORY D.
  • the self-monitoring circuit includes a diode pump type circuit, supplying a output transistor.
  • the circuit self-monitoring includes an OR-type circuit exclusive inserted by a first entry upstream of said MEMORY D circuit and including a second connected input to a microcontroller that can provide on this second input a test pulse of duration dt greater than the duration of said rectangular pulses, the microcontroller being connected to the MEMORY D circuit and being scheduled to observe a change in information from position during said period when the system is at rest.
  • reference 1 designates a photovoltaic element, powered by a source luminous 2, for example a lamp powered by a battery 3.
  • the photovoltaic element is placed in a shielded enclosure 4, the light passing through a window 4A; the photovoltaic element supplied by a voltage Vcc for example 5 volts and capable of delivering 20 mA in Crete; an electronic circuit 5, placed inside the shielded enclosure and powered by element 4, develops signals representative of the state of the device;
  • the circuit includes an inductor 6 made up a winding 6A and a movable core 6B linked to the element mobile of the device which one wishes to know the position; inductance 6 takes two different values depending on whether the core 6B is inside or outside of the winding 6A, and takes values evolving in proportion to the penetration of the nucleus between the two values mentioned above.
  • the electrical output signal from circuit 5 is converted into a light signal by a component optoelectronics 8 and routed through an optical fiber 9 up to signal processing station 10.
  • a optoelectronic component 11 ensures the conversion of the light signal into electrical signal which is received by a electronic processing circuit 12 supplying by example signaling 13 and alarm 14.
  • the DC voltage is developed using a 1A integrated photovoltaic cell placed at inside the shielded enclosure (this cell is by example an ASGA cell marketed by the company SPECTEC), connected by a 4B optical fiber crossing the shielded cell wall supplied by a diode laser 3A.
  • circuit 5 includes a Schmitt trigger 20 receiving the voltage Vcc, and comprising a component 21, an adjustable resistance 22 and a capacitor 23; this trigger outputs A rectangular pulses with rising edges distant for example 100 microseconds and whose duration is for example 40 microseconds. (see figure 3 A).
  • circuit integrator 30 which includes a capacitor 31, a resistor 32 and a diode 33 to attenuate strongly the peaks due to the falling fronts of pulses ( Figure 3B).
  • the integrator is followed by a reversing element 40 at threshold s1 which supplies, at output C, pulses of calibrated length, for example 10 microseconds (figure 3C).
  • the signal is sent on a time constant circuit comprising the variable inductance 6, of value denoted L, and an adjustable resistance of value R3.
  • the 3D curve shows, on its left side, the shape of the output signal of the LR3 circuit, at point D, when the inductance at a high value (core 6B inside the winding 6A); the 3D curve shows, on its right side, the shape of the signal in D when the inductance at a low value (core outside the winding).
  • the output signal of the reversing element is inverted by an inverter circuit 50 and the output signal in F (diagram 3F) is addressed, at the same time as the signal at D, to a threshold inverting circuit 60, the threshold s2 is shown in Figure 3D.
  • pulses are obtained of short duration (3 microseconds for example) when the inductance L is weak (nucleus released) and longer lasting (greater than 5 and less at 10 microseconds for example) when the L value is high (retracted core); these impulses are shown respectively to the left and to the right of the 3G diagram.
  • the relation A makes it possible to show that if the trigger threshold is constant, the width of impulses is directly proportional to L / R3, therefore to L, since R3 is substantially constant.
  • the pulses at the output of circuit 60 are addressed to a transistor 61 supplying, through a resistor 62, a diodeemissive 63, for example type TI510 from the company Hewlett Packard, connected to a optical fiber 64 which crosses the shield 4 and routes information, in the form of light pulses, to a treatment center.
  • a diodeemissive 63 for example type TI510 from the company Hewlett Packard
  • the capacitor Cc in parallel on the resistance R3, used to compensate for the internal capacity of the winding.
  • the device of the invention for making contacts so that we will only need two inductance values to determine two widths impulse.
  • the inductance a winding with a ferromagnetic core, for example mumetal in the form of a tongue; the two values induction will be determined by the fact that the nucleus ferromagnetic will be in the winding or completely in outside the winding. It is understood that this application is not limiting and that we could consider using more than two inductance values, with intermediate positions of the core ferromagnetic and thus determine more than two durations impulse.
  • Figure 4 is a diagram of the control circuit the position of the signal contact and the circuit self-monitoring operation.
  • optical signals emitted by the converter 63 of Figure 3 are routed through an optical fiber 64 and transformed into electrical signals using a opto-electronic converter 65, for example a circuit R2501 from the company Hewlett Packard.
  • the converter output signals (H point of Figure 4), are represented in the 5H diagram of the FIG. 5, in which two pulses of small width to the left of the diagram and two pulses of large width to the right of the diagram.
  • circuit inverter 66 The pulses are reversed by a circuit inverter 66; the output signal of circuit 66 (point J in Figure 4), is shown in diagram 5J of the figure 5.
  • the signal at J is sent to a trigger Schmitt (for example a circuit 4093 from the company Radio Corporation of America, symbolized in Figure 5 by a resistor r and a capacitor c; the output signal of the Schmitt trigger, at point K in Figure 4, is shown in diagram 5K of figure 5.
  • a trigger Schmitt for example a circuit 4093 from the company Radio Corporation of America, symbolized in Figure 5 by a resistor r and a capacitor c; the output signal of the Schmitt trigger, at point K in Figure 4, is shown in diagram 5K of figure 5.
  • the signal in K is sent to an inverter circuit with thresholds 67, which can take a Vcc value as output or a value 0; the signal switches from Vcc to 0 when the input signal exceeds a first threshold s3 and switches from 0 to Vcc when the signal crosses a second threshold s4 (s3> s4).
  • the output signal (in M) of circuit 67 is shown in diagram 5M of figure 5.
  • the signal at M is sent to the 'DATA "input of a circuit 68 known as "MEMORY D” (for example a circuit 4013 of Control Data), whose entry “CLOCK” is connected to point M.
  • MEMORY D for example a circuit 4013 of Control Data
  • This circuit provides on its output Q, at each 0-1 transition from signal to M, a signal corresponding to the state of the "DATA" input.
  • the signal correspondent in the example chosen, is represented in diagram 5Q of figure 5.
  • the diagram in Figure 5N shows the potential on the gate of the transistor, in N, which always remains greater than or equal to Vcc as long as the chain opto-electronics works; the transistor then remains blocked.
  • Figure 6 illustrates an alternative embodiment of the self-monitoring circuit.
  • a circuit 90 of the exclusive OR type, comprising two inputs E1 and E2 and an output S, is inserted by sound input E1 between the threshold inverter circuit 67 and the MEMORY circuit D 68.
  • An mP microcontroller connected to the Q * output of the circuit 68 to acquire this information, is capable send a duration pulse "1" on input E2 dt> to.
  • This impulse corresponds to the start-up of self-monitoring and is referred to below as test pulse.
  • Self-monitoring can be periodic, with a own periodicity, or be part of the normal cycle of capture of information which is operated by sampling with a given frequency.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Selective Calling Equipment (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Push-Button Switches (AREA)
  • Alarm Systems (AREA)
  • Optical Communication System (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Pens And Brushes (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Locating Faults (AREA)
  • Near-Field Transmission Systems (AREA)
  • Vehicle Body Suspensions (AREA)
  • Seats For Vehicles (AREA)
  • Control And Safety Of Cranes (AREA)
  • Electronic Switches (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

Device for signalling the status of an apparatus which can assume several discrete states and transmission of the corresponding information, characterised in that it comprises: - means for deriving, inside a shielded enclosure (4) a DC voltage which is free of fluctuations, the said shielded enclosure comprising within it: - a first means (5) for deriving, from the said DC voltage, electrical pulses of duration proportional to the value of an inductor (6), this inductor being capable of taking distinct values according to the various states of the apparatus, - a second means (8) for converting the said electrical pulses into optical pulses and an optical fibre (9) for transmitting these pulses out of the said enclosure to a processing unit (10). <IMAGE>

Description

La présente invention telle que définie dans les revendications est relative à un dispositif pour signaler la position d'un organe mobile.The present invention as defined in the claims relates to a device to signal the position of a movable member.

L'invention trouve notamment application dans l'électrotechnique, et le présent mémoire sera illustré par un exemple qui, bien entendu n'est pas limitatif.The invention finds particular application in electrical engineering, and this brief will be illustrated by an example which, of course is not limiting.

L'exemple est relatif à la signalisation de la position des contacts d'un appareil de coupure de courant électrique, tel qu'un disjoncteur. Il est indispensable à l'exploitant d'un poste électrique comportant des appareils tels que des disjoncteurs, de connaítre avec certitude l'état, ouvert ou fermé, de la position des contacts de chacun des disjoncteurs; cette information, généralement disponible au niveau de chacun des disjoncteurs, est centralisée dans un poste de contrôle et de commande; il est impératif que toute défaillance du circuit de transmission d'information qui relie chacun des appareils audit poste soit immédiatement signalée, sans quoi le signal reçu au poste peut faire croire qu'un appareil est dans un état donné alors qu'il est dans l'état inverse; cette erreur peut entraíner des conséquences fâcheuses pour l'exploitant du réseau électrique.The example relates to the signaling of the position of the contacts of a power cut-off device electrical, such as a circuit breaker. It is essential to the operator of a substation with devices such as circuit breakers, to know with certainty the state, open or closed, of the position of contacts of each of the circuit breakers; this information, generally available at each of the circuit breakers, is centralized in a control station and control; it is imperative that any failure of the information transmission circuit which connects each of the audit devices are immediately reported, without what the signal received at the station can make believe that a device is in a given state while it is in the reverse state; this error can cause unfortunate consequences for the network operator electric.

Pour les mêmes raisons, il est indispensable que l'appareil qui fournit la signalisation signale lui-même, dans une large mesure, qu'il est en panne ou que son alimentation est défaillante. Cette auto-surveillance permet d'accroítre considérablement la disponibilité de la partie auto-surveillée du dispositif.For the same reasons, it is essential that the device providing the signaling signals itself, to a large extent that it is down or that its power supply is failing. This self-monitoring considerably increases the availability of self-monitoring part of the device.

Bien entendu, le problème n'est pas limité à la détection de la position des contacts d'un disjoncteurs; dans les postes électriques, cette signalisation, appelée aussi contact signal, concerne les pressostats, la pression d'huile des circuits de commande hydrauliques, les niveaux d'huile, etc.. Of course, the problem is not limited to the detection of the position of the contacts of a circuit breaker; in electrical substations, this signaling, called also signal contact, relates to pressure switches, oil pressure of the hydraulic control circuits, oil levels, etc.

Sur 100 défaillances majeures d'un poste électriques, 30 environ sont dues à un mauvais contact signal; on conçoit donc l'importance du problème.Out of 100 major failures of a station electrical, about 30 are due to poor contact signal; we therefore understand the importance of the problem.

Un but de l'invention est donc de réaliser un dispositif pour la signalisation de l'état d'un appareil par la détection de cet état et la transmission de l'information correspondante, qui soit d'un fonctionnement sans erreur possible sur l'état détecté, et qui signale immédiatement sa propre défaillance ainsi que celle de la ligne de transmission de l'information.An object of the invention is therefore to produce a device for signaling the status of a device by detecting this state and transmitting the corresponding information, which is of a functioning without possible error on the detected state, and which signals immediately his own failure as well as that of the information transmission line.

Un autre but de l'invention est de réaliser un dispositif insensible aux influences extérieures tels que les champs électriques ou les champs magnétiques ainsi qu'aux perturbations de mode commun rencontrées lorsqu'on utilise des liaisons galvaniques.Another object of the invention is to provide a device insensitive to external influences such as electric fields or magnetic fields as well than common mode disturbances encountered when uses galvanic connections.

On sait que l'alimentation par élément optoélectronique, la transmission par fibre optique et le blindage du dispositif permettent de répondre à l'exigence précédente. On se heurte alors au problème de consommation du dispositif; un autre but de l'invention est donc de réaliser un dispositif ne nécessitant pour son fonctionnement pas davantage d'énergie que celle disponible au moyen d'une cellule photovoltaïque.We know that element feeding optoelectronics, fiber optic transmission and the shielding of the device make it possible to respond to the previous requirement. We then come up against the problem of device consumption; another object of the invention is therefore to make a device that does not require operating no more energy than that available by means of a photovoltaic cell.

Dans le brevet américain n°4 626 621, il est décrit un circuit pour déterminer la position d'un objet, comprenant deux circuits LR attaqués par un signal carré issu d'un générateur d'impulsions. L'un des circuits LR comporte une inductance fixe, l'autre une inductance variable selon la position de l'objet. L'établissement des tensions dans les circuits se fait, à partir d'un instant t1, selon des lois exponentielles différentes dans les deux circuits, et on mesure les instants respectifs t2 et t3 correspondant à l'établissement sur les deux circuits d'une tension de valeur donnée Vo. Le rapport (t3 - t1)/(t2 - t1) fournit une valeur correspondant à la position recherchée. In U.S. Patent No. 4,626,621, it is describes a circuit for determining the position of an object, comprising two LR circuits attacked by a square signal from a pulse generator. One of the LR circuits has a fixed inductor, the other a inductor variable depending on the position of the object. The establishment of voltages in the circuits is done, from a moment t1, according to different exponential laws in two circuits, and we measure the respective times t2 and t3 corresponding to the establishment on the two circuits of a voltage of given value Vo. The report (t3 - t1) / (t2 - t1) provides a value corresponding to the position sought.

Un tel circuit est complexe puisqu'il comprend deux circuits LR, deux amplificateurs opérationnels, deux compteurs, etc.., et il ne permet pas de détecter ses propres défaillances.Such a circuit is complex since it includes two LR circuits, two operational amplifiers, two counters, etc., and it cannot detect its own failures.

Un but de l'invention est de réaliser un circuit comportant le minimum de composants, et, comme il a déjà été indiqué, capable de signaler ses propres défaillances.An object of the invention is to provide a circuit with the minimum of components, and, as it already has been indicated, able to report its own failures.

Le document EP-A- 0 272 750 enseigne des moyens pour convertir des impulsions electriques en impulsions optiques et des moyens tels qu'un fibre optique pour transmettre ces impulsions vers un centre de traitement.Document EP-A-0 272 750 teaches means for converting electrical pulses into optical pulses and means such as an optical fiber for transmitting these pulses to a processing center.

L'invention a pour objet un dispositif pour la signalisation de l'état d'un appareil pouvant prendre au moins deux états discrets et pour la transmission de l'information correspondante,
ledit dispositif comprenant :

  • des moyens pour élaborer, à l'intérieur d'une enceinte blindée, une tension continue exempte de perturbations, ladite enceinte blindée comportant à son intérieur:
  • un premier moyen pour élaborer, à partir de ladite tension continue, des impulsions électriques de durée proportionnelle à la valeur d'une inductance, cette inductance pouvant prendre des valeurs distinctes selon les divers états de l'appareil,
  • un second moyen pour convertir lesdites impulsions électriques en impulsions optiques et une fibre optique pour transmettre ces impulsions hors de ladite enceinte vers un centre de traitement, caractérisé en ce que les moyens pour élaborer une tension continue comprennent un élément photovoltaïque placé à l'intérieur de ladite enceinte blindée et éclairé à travers une fenêtre de celle-ci par une source lumineuse. En variante, les moyens pour élaborer une tension continue comprennent une cellule photo-voltaïque intégrée placée à l'intérieur de ladite enceinte blindée et associée à une fibre optique alimentée par une diode laser placée à l'extérieur de ladite enceinte blindée.
The subject of the invention is a device for signaling the state of a device which can take at least two discrete states and for transmitting the corresponding information,
said device comprising:
  • means for developing, inside a shielded enclosure, a DC voltage free of disturbances, said shielded enclosure comprising inside:
  • a first means for developing, from said direct voltage, electrical pulses of duration proportional to the value of an inductance, this inductance being able to take on distinct values according to the various states of the apparatus,
  • a second means for converting said electrical pulses into optical pulses and an optical fiber for transmitting these pulses out of said enclosure to a processing center, characterized in that the means for developing a DC voltage comprise a photovoltaic element placed inside said shielded enclosure and lit through a window thereof by a light source. As a variant, the means for developing a DC voltage comprise an integrated photovoltaic cell placed inside said shielded enclosure and associated with an optical fiber supplied by a laser diode placed outside of said shielded enclosure.

Dans un mode particulier de réalisation, ledit premier moyen comprend un circuit pour élaborer des impulsions rectangulaires de durée constante et séparées par des intervalles de temps égaux, un circuit intégrateur recevant lesdites impulsions, un premier circuit inverseur à seuil recevant les signaux de sortie de l'intégrateur et fournissant en sortie des impulsions calibrées, un circuit à constante de temps comprenant une résistance et ladite inductance, le signal de sortie dudit premier circuit inverseur à seuil étant envoyé à la fois à l'entrée dudit circuit à constante de temps et sur un second circuit inverseur, les signaux de sortie du circuit à constante de temps et du second circuit inverseur étant adressés à l'entrée d'un troisième circuit inverseur à seuil dont la sortie est reliée à un amplificateur alimentant ledit second moyen.In a particular embodiment, said first means comprises a circuit for developing rectangular pulses of constant and separate duration by equal time intervals, an integrating circuit receiving said pulses, a first inverter circuit with threshold receiving the output signals from the integrator and providing as output calibrated pulses, a circuit with time constant comprising a resistance and said inductance, the output signal of said first circuit threshold inverter being sent both to the input of said time constant circuit and on a second inverter circuit, the circuit output signals to time constant and the second inverter circuit being addressed to the input of a third inverter circuit to threshold whose output is connected to an amplifier feeding said second means.

Avantageusement, ledit second moyen est une photo-diode.Advantageously, said second means is a photo-diode.

Ledit centre de traitement comprend un circuit de démodulation et un circuit d'auto-surveillance.Said processing center includes a circuit for demodulation and a self-monitoring circuit.

Dans un mode particulier de réalisation, ledit circuit de démodulation comprend un convertisseur photo-voltaïque recevant le signal de ladite fibre optique, un trigger de Schmitt et un circuit de type MEMOIRE D.In a particular embodiment, said demodulation circuit includes a converter photovoltaic receiving signal from said fiber optics, a Schmitt trigger and a type circuit MEMORY D.

Avantageusement, le circuit d'auto-surveillance comprend un circuit du type pompe à diode, alimentant un transistor de sortie.Advantageously, the self-monitoring circuit includes a diode pump type circuit, supplying a output transistor.

Dans une variante de réalisation, le circuit d'auto-surveillance comprend un circuit de type OU exclusif inséré par une première entrée en amont dudit circuit MEMOIRE D et comprenant une seconde entrée reliée à un microcontrôleur pouvant fournir sur cette seconde entrée une impulsion de test de durée dt supérieure à la durée desdites impulsions rectangulaires, le microcontrôleur étant relié au circuit MEMOIRE D et étant programmé pour observer un changement de l'information de position pendant ladite durée lorsque le système est au repos.In an alternative embodiment, the circuit self-monitoring includes an OR-type circuit exclusive inserted by a first entry upstream of said MEMORY D circuit and including a second connected input to a microcontroller that can provide on this second input a test pulse of duration dt greater than the duration of said rectangular pulses, the microcontroller being connected to the MEMORY D circuit and being scheduled to observe a change in information from position during said period when the system is at rest.

L'invention sera bien comprise par la description donnée ci-après d'un exemple de réalisation donné à titre illustratif et nullement limitatif, en référence au dessin annexé dans lequel:

  • la figure 1 est un schéma électrique par blocs du dispositif de l'invention,
  • la figure 2 est un schéma d'un mode de réalisation du circuit d'élaboration des impulsions de durée proportionnelle à une la valeur d'une inductance,
  • la figure 3 présentent divers diagrammes expliquant le fonctionnement du circuit de la figure 2,
  • la figure 4 est un schéma du circuit de contrôle et d'auto-surveillance,
  • la figure 5 présente plusieurs diagrammes expliquant le fonctionnement des circuits de la figure 4,
  • la figure 6 représente une variante de réalisation du système d'auto-surveillance.
The invention will be better understood from the description given below of an exemplary embodiment given by way of illustration and in no way limiting, with reference to the appended drawing in which:
  • FIG. 1 is an electrical block diagram of the device of the invention,
  • FIG. 2 is a diagram of an embodiment of the circuit for producing pulses of duration proportional to the value of an inductance,
  • FIG. 3 presents various diagrams explaining the operation of the circuit of FIG. 2,
  • FIG. 4 is a diagram of the control and self-monitoring circuit,
  • FIG. 5 presents several diagrams explaining the operation of the circuits of FIG. 4,
  • FIG. 6 represents an alternative embodiment of the self-monitoring system.

Dans la figure 1, la référence 1 désigne un élément photovoltaïque, alimenté par une source lumineuse 2, par exemple une lampe alimentée par une batterie 3. L'élément photovoltaïque est placée dans une enceinte blindée 4, la lumière traversant une fenêtre 4A; l'élément photovoltaïque fournit par une tension Vcc par exemple de 5 volts et capable de délivrer 20 mA en crête; un circuit électronique 5, placé à l'intérieur de l'enceinte blindée et alimenté par l'élément 4, élabore des signaux représentatifs de l'état de l'appareil; à cet effet, le circuit comprend une inductance 6 constituée d'un bobinage 6A et d'un noyau mobile 6B lié à l'élément mobile de l'appareil dont on souhaite connaítre la position; l'inductance 6 prend deux valeurs différentes selon que le noyau 6B est à l'intérieur ou à l'extérieur du bobinage 6A, et prend des valeurs évoluant proportionnellement à la pénétration du noyau entre les deux valeurs précitées. Le signal électrique de sortie du circuit 5 est converti en signal lumineux par un composant optoélectronique 8 et acheminé par une fibre optique 9 jusqu'au poste 10 de traitement du signal. Là, un composant optoélectronique 11 assure la conversion du signal lumineux en signal électrique qui est reçu par un circuit électronique de traitement 12 alimentant par exemple une signalisation 13 et une alarme 14.In Figure 1, reference 1 designates a photovoltaic element, powered by a source luminous 2, for example a lamp powered by a battery 3. The photovoltaic element is placed in a shielded enclosure 4, the light passing through a window 4A; the photovoltaic element supplied by a voltage Vcc for example 5 volts and capable of delivering 20 mA in Crete; an electronic circuit 5, placed inside the shielded enclosure and powered by element 4, develops signals representative of the state of the device; In this Indeed, the circuit includes an inductor 6 made up a winding 6A and a movable core 6B linked to the element mobile of the device which one wishes to know the position; inductance 6 takes two different values depending on whether the core 6B is inside or outside of the winding 6A, and takes values evolving in proportion to the penetration of the nucleus between the two values mentioned above. The electrical output signal from circuit 5 is converted into a light signal by a component optoelectronics 8 and routed through an optical fiber 9 up to signal processing station 10. There, a optoelectronic component 11 ensures the conversion of the light signal into electrical signal which is received by a electronic processing circuit 12 supplying by example signaling 13 and alarm 14.

Grâce à l'emploi du blindage, à l'alimentation par un élément photovoltaïque et à la transmission par fibres optiques, les mesures effectuées sont à l'abri de toutes les perturbations possibles (en particulier l'absence de liaison galvanique permet d'éviter toute tension de mode commun sur le transducteur de position).Thanks to the use of shielding, power supply a photovoltaic element and transmission by fiber optics, the measurements made are protected from all possible disturbances (in particular the absence of galvanic connection makes it possible to avoid any common mode voltage on the position transducer).

En variante, représentée en traits tiretés dans la figure 1, la tension continue est élaborée au moyen d'une cellule photovoltaïque intégrée 1A placée à l'intérieur de l'enceinte blindée (cette cellule est par exemple une cellule ASGA commercialisée par la société SPECTEC), reliée par une fibre optique 4B traversant la paroi de la cellule blindée et alimentée par une diode laser 3A.Alternatively, shown in dashed lines in Figure 1, the DC voltage is developed using a 1A integrated photovoltaic cell placed at inside the shielded enclosure (this cell is by example an ASGA cell marketed by the company SPECTEC), connected by a 4B optical fiber crossing the shielded cell wall supplied by a diode laser 3A.

Dans la figure 2, le circuit 5 comprend un trigger de Schmitt 20 recevant la tension Vcc, et comprenant un composant 21, une résistance ajustable 22 et un condensateur 23; ce trigger délivre en sortie A des impulsions rectangulaires dont les fronts de montée sont distants par exemple de 100 microsecondes et dont la durée est par exemple de 40 microsecondes. (voir figure 3 A).In Figure 2, circuit 5 includes a Schmitt trigger 20 receiving the voltage Vcc, and comprising a component 21, an adjustable resistance 22 and a capacitor 23; this trigger outputs A rectangular pulses with rising edges distant for example 100 microseconds and whose duration is for example 40 microseconds. (see figure 3 A).

En sortie du trigger est placé un circuit intégrateur 30 qui comprend un condensateur 31, une résistance 32 et une diode 33 permettant d'atténuer fortement les pics dus aux fronts descendants des impulsions (figure 3B). At the output of the trigger is placed a circuit integrator 30 which includes a capacitor 31, a resistor 32 and a diode 33 to attenuate strongly the peaks due to the falling fronts of pulses (Figure 3B).

L'intégrateur est suivi par un élément inverseur 40 à seuil s1 qui fournit en sortie C, des impulsions de longueur calibrées, par exemple 10 microsecondes (figure 3C).The integrator is followed by a reversing element 40 at threshold s1 which supplies, at output C, pulses of calibrated length, for example 10 microseconds (figure 3C).

En C, le signal est envoyé sur un circuit à constante de temps comprenant l'inductance variable 6, de valeur notée L, et une résistance de valeur R3 ajustable. La courbe 3D montre, sur sa partie gauche, l'allure du signal de sortie du circuit LR3, au point D, lorsque l'inductance à une forte valeur (noyau 6B à l'intérieur du bobinage 6A); la courbe 3D montre, sur sa partie droite, l'allure du signal en D lorsque l'inductance à une faible valeur (noyau à l'extérieur du bobinage). La différence d'allure des courbes s'explique par la loi d'établissement du courant i dans un circuit à constante de temps LR, qui est : i = Imax (1-exp-t/t*)
avec t* voisin de L/R3 et Imax voisin de Vcc/R3, la résistance du bobinage étant négligeable.In C, the signal is sent on a time constant circuit comprising the variable inductance 6, of value denoted L, and an adjustable resistance of value R3. The 3D curve shows, on its left side, the shape of the output signal of the LR3 circuit, at point D, when the inductance at a high value (core 6B inside the winding 6A); the 3D curve shows, on its right side, the shape of the signal in D when the inductance at a low value (core outside the winding). The difference in the shape of the curves is explained by the law for establishing the current i in a time constant circuit LR, which is: i = Imax (1-exp-t / t *)
with t * close to L / R3 and Imax close to Vcc / R3, the winding resistance being negligible.

Le signal de sortie de l'élément inverseur est inversé par un circuit inverseur 50 et le signal de sortie en F (diagramme 3F) est adressé, en même temps que le signal en D, à un circuit inverseur à seuil 60, dont le seuil s2 est représenté dans la figure 3D.The output signal of the reversing element is inverted by an inverter circuit 50 and the output signal in F (diagram 3F) is addressed, at the same time as the signal at D, to a threshold inverting circuit 60, the threshold s2 is shown in Figure 3D.

En sortie du circuit 60, on obtient des impulsions de courte durée (3 microsecondes par exemple) lorsque l'inductance L est faible (noyau sorti) et de plus longue durée (supérieure à 5 et inférieure à 10 microsecondes par exemple) lorsque la valeur L est élevée (noyau rentré) ; ces impulsions sont représentées respectivement à la gauche et à la droite du diagramme 3G. La relation A permet de montrer que si le seuil du trigger est bien constant, la largeur des impulsions est directement proportionnelle à L/R3, donc à L, puisque R3 est sensiblement constante.At the output of circuit 60, pulses are obtained of short duration (3 microseconds for example) when the inductance L is weak (nucleus released) and longer lasting (greater than 5 and less at 10 microseconds for example) when the L value is high (retracted core); these impulses are shown respectively to the left and to the right of the 3G diagram. The relation A makes it possible to show that if the trigger threshold is constant, the width of impulses is directly proportional to L / R3, therefore to L, since R3 is substantially constant.

Les impulsions en sortie du circuit 60 sont adressées à un transistor 61 alimentant, à travers une résistance 62, une diodeémissive 63, par exemple du type TI510 de la société Hewlett Packard, reliée à une fibre optique 64 qui traverse le blindage 4 et achemine les informations, sous forme d'impulsions lumineuses, à un centre de traitement.The pulses at the output of circuit 60 are addressed to a transistor 61 supplying, through a resistor 62, a diodeemissive 63, for example type TI510 from the company Hewlett Packard, connected to a optical fiber 64 which crosses the shield 4 and routes information, in the form of light pulses, to a treatment center.

Le condensateur Cc, en parallèle sur la résistance R3, sert à compenser la capacité interne du bobinage.The capacitor Cc, in parallel on the resistance R3, used to compensate for the internal capacity of the winding.

Dans la plupart des applications, on utilisera le dispositif de l'invention pour réaliser des contacts "signaux", de telle sorte qu'on n'aura besoin que de deux valeurs d'inductances pour déterminer deux largeurs d'impulsion. On utilisera alors pour l'inductance un bobinage avec un noyau ferromagnétique, par exemple du mumétal sous forme d'une languette; les deux valeurs d'induction seront déterminées par le fait que le noyau ferromagnétique sera dans le bobinage ou complètement en dehors du bobinage. Il est bien entendu que cette application n'est pas limitative et qu'on pourrait envisager d'utiliser plus de deux valeurs d'inductance, avec des positions intermédiaires du noyau ferromagnétique et déterminer ainsi plus de deux durées d'impulsion.In most applications, the device of the invention for making contacts "signals", so that we will only need two inductance values to determine two widths impulse. We will then use for the inductance a winding with a ferromagnetic core, for example mumetal in the form of a tongue; the two values induction will be determined by the fact that the nucleus ferromagnetic will be in the winding or completely in outside the winding. It is understood that this application is not limiting and that we could consider using more than two inductance values, with intermediate positions of the core ferromagnetic and thus determine more than two durations impulse.

La figure 4 est un schéma du circuit de contrôle de la position du contact signal et du circuit d'autosurveillance du fonctionnement.Figure 4 is a diagram of the control circuit the position of the signal contact and the circuit self-monitoring operation.

Les signaux optiques émis par le convertisseur 63 de la figure 3 sont acheminés par une fibre optique 64 et transformés en signaux électriques à l'aide d'un convertisseur opto-électronique 65, par exemple un circuit R2501 de la société Hewlett Packard.The optical signals emitted by the converter 63 of Figure 3 are routed through an optical fiber 64 and transformed into electrical signals using a opto-electronic converter 65, for example a circuit R2501 from the company Hewlett Packard.

Les signaux de sortie du convertisseur (point H de la figure 4), sont représentés dans le diagramme 5H de la figure 5, dans lequel on a présenté deux impulsions de faible largeur à gauche du diagramme et deux impulsions de grande largeur à la droite du diagramme. The converter output signals (H point of Figure 4), are represented in the 5H diagram of the FIG. 5, in which two pulses of small width to the left of the diagram and two pulses of large width to the right of the diagram.

Les impulsions sont inversées par un circuit inverseur 66; le signal de sortie du circuit 66 (point J de la figure 4), est représenté dans le diagramme 5J de la figure 5.The pulses are reversed by a circuit inverter 66; the output signal of circuit 66 (point J in Figure 4), is shown in diagram 5J of the figure 5.

Le signal en J est adressé à un trigger de Schmitt (par exemple un circuit 4093 de la société Radio Corporation of America, symbolisé dans la figure 5 par une résistance r et un condensateur c; le signal de sortie du trigger de Schmitt, au point K de la figure 4, est représenté dans le diagramme 5K de la figure 5.The signal at J is sent to a trigger Schmitt (for example a circuit 4093 from the company Radio Corporation of America, symbolized in Figure 5 by a resistor r and a capacitor c; the output signal of the Schmitt trigger, at point K in Figure 4, is shown in diagram 5K of figure 5.

Le signal en K est adressé à un circuit inverseur à seuils 67, qui peut prendre en sortie une valeur Vcc ou une valeur 0; le signal bascule de Vcc à 0 lorsque le signal d'entrée dépasse un premier seuil s3 et bascule de 0 à Vcc lorsque le signal traverse un second seuil s4 (s3 > s4). Le signal de sortie (en M) du circuit 67 est représenté dans le diagramme 5M de la figure 5.The signal in K is sent to an inverter circuit with thresholds 67, which can take a Vcc value as output or a value 0; the signal switches from Vcc to 0 when the input signal exceeds a first threshold s3 and switches from 0 to Vcc when the signal crosses a second threshold s4 (s3> s4). The output signal (in M) of circuit 67 is shown in diagram 5M of figure 5.

Le signal en M est adressé à l'entrée 'DATA" d'un circuit 68 dit "MEMOIRE D" (par exemple un circuit 4013 de la société Control Data), dont l'entrée "CLOCK" est reliée au point M. Ce circuit fournit sur sa sortie Q, à chaque transition 0-1 du signal en M, un signal correspondant à l'état de l'entrée "DATA". Le signal correspondant, dans l'exemple choisi, est représenté dans le diagramme 5Q de la figure 5. On utilisera de préférence, pour fournir l'information "POSITION" du contact, le signal complémentaire Q*, représenté dans le diagramme 5Q* de la figure 5.The signal at M is sent to the 'DATA "input of a circuit 68 known as "MEMORY D" (for example a circuit 4013 of Control Data), whose entry "CLOCK" is connected to point M. This circuit provides on its output Q, at each 0-1 transition from signal to M, a signal corresponding to the state of the "DATA" input. The signal correspondent, in the example chosen, is represented in diagram 5Q of figure 5. We will use preferably to provide "POSITION" information from contact, the complementary signal Q *, represented in the 5Q * diagram in Figure 5.

Le circuit de démodulation qui vient d'être décrit est associé à un circuit d'auto-surveillance du dispositif de signalisation de l'invention. Ce circuit d'auto-surveillance est constitué d'une "pompe à diode" comprenant, de manière classique:

  • un transistor T à effet de champ,polarisé par une source continue Vcc à travers une résistance 70,
  • une première diode 71 en série avec un condensateur entre le point J et la grille du transistor,
  • un condensateur 73 et une résistance 74 en parallèle entre la base du transistor et la terre et,
  • une seconde diode 75.
The demodulation circuit which has just been described is associated with a self-monitoring circuit of the signaling device of the invention. This self-monitoring circuit consists of a "diode pump" comprising, in a conventional manner:
  • a field effect transistor T, polarized by a direct source Vcc through a resistor 70,
  • a first diode 71 in series with a capacitor between point J and the gate of the transistor,
  • a capacitor 73 and a resistor 74 in parallel between the base of the transistor and the earth and,
  • a second diode 75.

Le diagramme de la figure 5N montre le potentiel sur la grille du transistor, en N, qui reste toujours supérieur ou égal à Vcc tant que la chaíne opto-électronique fonctionne; le transistor reste alors bloqué.The diagram in Figure 5N shows the potential on the gate of the transistor, in N, which always remains greater than or equal to Vcc as long as the chain opto-electronics works; the transistor then remains blocked.

Si pour une raison quelconque (disparition de la source lumineuse, coupure d'une des fibres optiques, défaillance d'un composant électronique de la chaíne, y compris du circuit de pompe à diode, etc..) le signal en J vient à disparaítre, la tension sur la grille du transistor T disparaít par décharge du condensateur 73 dans la résistance 74 et un signal apparaít en X sur le drain du transistor T. On notera que seule la mémoire D échappe partiellement à cette auto-surveillance.If for any reason (disappearance of the light source, cutting of one of the optical fibers, failure of an electronic component of the chain, including diode pump circuit, etc.) the signal in J comes to disappear, the tension on the grid of transistor T disappears by discharging the capacitor 73 in resistor 74 and a signal appears in X on the drain of transistor T. It will be noted that only the memory D partially escapes this self-monitoring.

La figure 6 illustre une variante de réalisation du circuit d'autosurveillance.Figure 6 illustrates an alternative embodiment of the self-monitoring circuit.

Par rapport au circuit de la figure 4, il diffère par la disparition de la chaíne comprenant le transistor T.Compared to the circuit of figure 4, it differs by the disappearance of the chain comprising the transistor T.

Un circuit 90, de type OU exclusif,comprenant deux entrées E1 et E2 et une sortie S, est inséré par son entrée E1 entre le circuit inverseur à seuil 67 et le circuit MEMOIRE D 68.A circuit 90, of the exclusive OR type, comprising two inputs E1 and E2 and an output S, is inserted by sound input E1 between the threshold inverter circuit 67 and the MEMORY circuit D 68.

Un microcontrôleur mP, relié à la sortie Q* du circuit 68 pour acquérir cette information, est capable d'envoyer sur l'entrée E2 une impulsion unité "1" de durée dt>to. Cette impulsion correspond à la mise en route de l'auto-surveillance et est désignée dans la suite par impulsion de test.An mP microcontroller, connected to the Q * output of the circuit 68 to acquire this information, is capable send a duration pulse "1" on input E2 dt> to. This impulse corresponds to the start-up of self-monitoring and is referred to below as test pulse.

On observe tout d'abort le tableau de vérité ci-dessou du circuit 90. E1 E2 S 0 0 0 0 1 1 1 0 0 1 1 0 We immediately observe the truth table below from circuit 90. E1 E2 S 0 0 0 0 1 1 1 0 0 1 1 0

Lorsque E2 = 0, le OU exclusif recopie en S l'entrée E1, donc ce circuit additionnel ne modifie pas l'information délivrée initialement en Q*.When E2 = 0, the exclusive OR copies in S the input E1, so this additional circuit does not modify the information initially delivered in Q *.

Par contre, on remarque que dès que l'impulsion de test est lancée, E2 = 1. Le logiciel ayant vérifié que le système est à l'état de repos, aucun n'ordre n'ayant été lancé, il doit y avoir obligatoirement remplacement de Q* par Q*, quelle que soit la valeur initiale de Q*, si les impulsions en retour du transducteur existent bien. Il suffit pour cela que l'impulsion de test ait une largeur légèrement supérieure à t0, période d'émission des impulsionsOn the other hand, we notice that as soon as the impulse of test is launched, E2 = 1. The software having verified that the system is in idle state, no order has been launched, there must be a replacement for Q * by Q *, whatever the initial value of Q *, if the pulses in return from the transducer do exist. he it is sufficient for this that the test pulse has a width slightly greater than t0, period of issue of impulses

Pour faire l'auto-test, le programme note d'abord la valeur Q*o de Q*, puis il met E2 à "1" pendant dt et vérifie que pendant cette fenêtre dt, Q* est devenu Q1 = Q*. Lorsque l'impulsion est coupée, le microcontrôleur mP ouvre une nouvelle fenêtre temporelle de durée dt. Dans cette deuxième fenêtre, il vérifiera que Q2 = Q1 = Qo.To do the self-test, the program first notes the value Q * o of Q *, then it sets E2 to "1" for dt and checks that during this window dt, Q * has become Q1 = Q *. When the pulse is cut off, the microcontroller mP opens a new time window of duration dt. In this second window, it will check that Q2 = Q1 = Qo.

Par cette procédure, et par un choix convenable de dt, on vérifie toute la chaíne de mesure, y compris le circuit MEMOIRE D 68 et la porte 67 qui échappait à la surveillance dans le circuit de la figure 4.By this procedure, and by a suitable choice of dt, we check the entire measurement chain, including the MEMORY circuit D 68 and gate 67 which escaped the monitoring in the circuit of figure 4.

On notera que toute défaillance du circuit OU exclusit 90 sera également détectée par l'auto-surveillance, car elle se traduirait par le non remplacement de Q* par Q* lorsque l'impulsion de test est lancée.Note that any failure of the OU exclusive 90 circuit will also be detected by self-monitoring, as it would result in the non-replacement of Q * by Q * when the test pulse is launched.

L'auto-surveillance peut être périodique, avec une périodicité propre, ou faire partie du cycle normal de saisie de l'information qui est opérée par échantillonnage avec une fréquence donnée. Self-monitoring can be periodic, with a own periodicity, or be part of the normal cycle of capture of information which is operated by sampling with a given frequency.

Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et représentés qui n'ont été donnés qu'à titre d'exemple, dans lequel on peut remplacer les moyens ou groupes de moyens décrits par des moyens ou groupes de moyens équivalents.Of course, the invention is not limited to embodiments described and shown which have not been given as an example, in which we can replace the means or groups of means described by means or groups of equivalent means.

Claims (8)

  1. Device for signalling remotely the state of a device able to assume a plurality of discrete states and for transmitting the corresponding information, said device comprising:
    means for producing inside a screened enclosure (4) a direct current voltage free of interference, said screened enclosure containing:
    first means (5) for producing from said direct current voltage electrical pulses whose duration is proportional to the value of an inductance (6) which can assume distinct values according to the various states of the device,
    second means (8) for converting said electrical pulses into optical pulses and an optical fibre (9) for transmitting said pulses out of said enclosure to a processor (10), characterised in that the means for producing a direct current voltage comprise a photovoltaic cell (1) inside said screened enclosure (4) and illuminated through a window in the latter by a light source (2).
  2. Device according to claim 1 characterised in that the means for producing a direct current voltage comprise an integrated photovoltaic cell (1A) inside said screened enclosure (4) and associated with an optical fibre (4B) fed with light by a laser diode (3A).
  3. Device according to claim 1 or claim 2 characterised in that said first means (5) comprise a circuit (20) for producing rectangular pulses of constant duration separated by equal time intervals, an integrator (30) receiving said pulses, a first inverter (40) receiving the output signals of the integrator and supplying calibrated pulses at its output, a time constant circuit comprising a resistor (R3) and said inductor (L), the output signal of said first inverter (40) being applied to the input of said time constant circuit and to a second inverter (50), the output signals of the time constant circuit and the second inverter (50) being fed to the input of a third inverter (60) whose output is connected to an amplifier (61) driving said second means (8).
  4. Device according to any one of claims 1 to 3 characterised in that said second means (8) comprise a photodiode (63).
  5. Device according to any one of claims 1 to 4 characterised in that said processor (10) comprises a demodulator and a self-monitor circuit.
  6. Device according to claim 5 characterised in that said demodulator comprises a photovoltaic converter (65) receiving the signal from said optical fibre (64), a Schmitt trigger (r, c, 67) and a D-type flip-flop (68).
  7. Device according to claim 3 characterised in that the self-monitor circuit comprises a diode pump circuit driving an output transistor (T).
  8. Device according to claim 6 characterised in that the self-monitor circuit comprises an exclusive-OR gate (90) connected by a first input (E1) on the input side of said D-type flip-flop (68) and having a second input (E2) connected to a microcontroller (mP) adapted to apply to said second input a test pulse of duration dt exceeding the duration of said rectangular pulses, the microcontroller being connected to the D-type flip-flop (68) and being programmed to observe a change of the position information Q* during said period if the system is idle.
EP92401059A 1991-04-16 1992-04-15 Position signalling device of a movable component Expired - Lifetime EP0509920B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9104631 1991-04-16
FR9104631A FR2675609B1 (en) 1991-04-16 1991-04-16 DEVICE FOR SIGNALING THE POSITION OF A MOBILE MEMBER.

Publications (2)

Publication Number Publication Date
EP0509920A1 EP0509920A1 (en) 1992-10-21
EP0509920B1 true EP0509920B1 (en) 1998-09-02

Family

ID=9411882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401059A Expired - Lifetime EP0509920B1 (en) 1991-04-16 1992-04-15 Position signalling device of a movable component

Country Status (11)

Country Link
US (1) US5331319A (en)
EP (1) EP0509920B1 (en)
JP (1) JPH0716275B2 (en)
CN (1) CN1028807C (en)
AT (1) ATE170652T1 (en)
BR (1) BR9201411A (en)
CA (1) CA2066109C (en)
DE (1) DE69226803T2 (en)
DK (1) DK0509920T3 (en)
ES (1) ES2121832T3 (en)
FR (1) FR2675609B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2273840A (en) * 1992-12-09 1994-06-29 Sony Corp Optically transmitting signals between measurement devices
ES2117939B1 (en) * 1996-01-24 1999-03-16 Univ Madrid Politecnica INTEGRATED PHOTOVOLTAICALLY SELF-POWERED SENSOR SYSTEM FOR REMOTE MEASUREMENT OF PHYSICAL AND CHEMICAL PARAMETERS THROUGH OPTICAL CHANNELS.
US5880681A (en) * 1997-09-16 1999-03-09 Caterpillar Inc. Apparatus for determining the position of a work implement
JPH11122177A (en) * 1997-10-17 1999-04-30 Fujitsu Ltd Monitor control signal transmitter and its method
FR2938656B1 (en) * 2008-11-18 2011-08-26 Thales Sa INTRINSIC SECURITY SYSTEM AND TEST MODULE, IN PARTICULAR FOR USE IN A RAILWAY SIGNALING SYSTEM
CN117174511B (en) * 2023-11-02 2024-03-01 西安西电电力***有限公司 State light reporting device and method for bypass switch of flexible direct-current transmission power module

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984824A (en) * 1975-07-25 1976-10-05 The United States Of America As Represented By The Secretary Of The Army Wide-band optical analog signal link using fiber optics
US4359101A (en) * 1979-10-12 1982-11-16 Michel Gagnon Ground preparation tool for reforestation
FR2485774A1 (en) * 1980-06-26 1981-12-31 Cuggia Christiane Magnetic reed switch position detector e.g. for safe door - has test coil which acts against contact element to provide periodic testing of response of switch
US4490606A (en) * 1982-04-26 1984-12-25 Geosource Inc. Transducer apparatus utilizing fiber optics for data transmission
DE3219877A1 (en) * 1982-05-27 1983-12-01 kabelmetal electro GmbH, 3000 Hannover Circuit arrangement for monitoring and displaying the position of a device
US4626621A (en) * 1983-08-10 1986-12-02 Diesel Kiki Co., Ltd. Circuit for generating a position in digital form
GB2165712B (en) * 1984-10-17 1988-05-11 Stc Plc Power transmission
DE3506602A1 (en) * 1985-02-25 1986-08-28 Kraftwerk Union AG, 4330 Mülheim Device for signal transmission
JPS62267898A (en) * 1986-05-15 1987-11-20 オムロン株式会社 Remote signal transmitter
DE3643715A1 (en) * 1986-12-20 1988-06-30 Philips Patentverwaltung ARRANGEMENT FOR TRANSMISSION OF MEASURED VALUES FROM A SENSOR
US5229876A (en) * 1990-03-26 1993-07-20 At&T Bell Laboratories Telemetry for optical fiber amplifier repeater

Also Published As

Publication number Publication date
JPH0716275B2 (en) 1995-02-22
US5331319A (en) 1994-07-19
DE69226803T2 (en) 1999-04-01
CA2066109A1 (en) 1992-10-17
ES2121832T3 (en) 1998-12-16
CN1065945A (en) 1992-11-04
EP0509920A1 (en) 1992-10-21
DK0509920T3 (en) 1999-02-08
BR9201411A (en) 1992-12-01
DE69226803D1 (en) 1998-10-08
CN1028807C (en) 1995-06-07
ATE170652T1 (en) 1998-09-15
FR2675609B1 (en) 1995-06-16
JPH05183965A (en) 1993-07-23
CA2066109C (en) 1995-11-14
FR2675609A1 (en) 1992-10-23

Similar Documents

Publication Publication Date Title
EP1221783B1 (en) Remote feeding device for a terminal in a telecommunications network , concentrator and repeater with such a device
EP0583186B1 (en) Control unit for stabilising the ouput power of laser diodes
EP0034957B1 (en) Automatic output power regulating device for the emitter module of a fibre-optical transmission system
CA1201504A (en) Method and device for teledetection and telemetry of combustible gases in an atmosphere
EP0509920B1 (en) Position signalling device of a movable component
FR2466058A1 (en) SELF-MONITORING ALARM INSTALLATION
EP0002415B1 (en) Method and device for counting transmission errors in a digital radio relay link
CH641601A5 (en) FREQUENCY RELAYS FOR THE PROTECTION OF AN ELECTRICAL POWER TRANSMISSION LINE.
EP0501887A1 (en) Device and process of monitoring at least one light source
EP0002971B1 (en) Coupling device for an optical transmission line and transmission system comprising such device
CH637779A5 (en) PHOTOELECTRIC DETECTOR.
EP0014634A1 (en) Active coupler between an optical bus line and one of the subscribers, and bus line having such active couplers
EP3248305A1 (en) Ethernet switch for fiberoptic network
EP0524300A1 (en) Protection device for electrical equipment, machines and installations
EP0499169A1 (en) System for evaluating the characteristics of an electrical filter
FR2817972A1 (en) SYSTEM FOR DETECTING A CABLE FAILURE IN A TREE NETWORK
FR2664972A1 (en) Displacement sensor with oscillating (resonant) circuit magnetically coupled to a conducting target
EP0499171A1 (en) Fresnel reflections locating system along an optical fibre
FR2568431A1 (en) Device for monitoring the operation of a fibre optic link and receiver comprising such a device
EP0635725B1 (en) Electronic circuit for monitoring the presence of a voltage and for comparing the phase in conductors of electric lines
WO2006061470A1 (en) Method for monitoring operation of a telecommunication terminal in a fiber-optic telecommunication network
EP2166363B1 (en) Multi-standard connection device
EP2171417B1 (en) Signal detection in optical fibre
FR2518855A1 (en) Individual line and integrated subscriber junctor test device - has loop state simulator and multiplexer affording different voltages for digital processing
FR2811755A1 (en) Chromatic dispersion measurement device for fiber optic cable uses a variable wavelength light source that generates a different wave shape when the wavelength changes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

16A New documents despatched to applicant after publication of the search report
17P Request for examination filed

Effective date: 19930303

17Q First examination report despatched

Effective date: 19970703

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980902

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980902

REF Corresponds to:

Ref document number: 170652

Country of ref document: AT

Date of ref document: 19980915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69226803

Country of ref document: DE

Date of ref document: 19981008

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: GEC ALSTHOM SALES NETWORK SA

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981015

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981202

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2121832

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990415

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990415

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: S.A. GEC ALSTHOM

Effective date: 19990430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020319

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020327

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020328

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020402

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20020418

Year of fee payment: 11

Ref country code: DE

Payment date: 20020418

Year of fee payment: 11

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030415

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030415

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030416

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031101

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030415

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050415