EP0699614B1 - Method and device for monitoring the unwinding of a bobbin - Google Patents

Method and device for monitoring the unwinding of a bobbin Download PDF

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Publication number
EP0699614B1
EP0699614B1 EP19950401965 EP95401965A EP0699614B1 EP 0699614 B1 EP0699614 B1 EP 0699614B1 EP 19950401965 EP19950401965 EP 19950401965 EP 95401965 A EP95401965 A EP 95401965A EP 0699614 B1 EP0699614 B1 EP 0699614B1
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EP
European Patent Office
Prior art keywords
reel
signal
unwinding
turns
wire
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EP19950401965
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German (de)
French (fr)
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EP0699614A1 (en
Inventor
Francis Boue
Gilles Lacaisse
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Airbus Group SAS
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Airbus Group SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H61/00—Applications of devices for metering predetermined lengths of running material
    • B65H61/005—Applications of devices for metering predetermined lengths of running material for measuring speed of running yarns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
    • F41F3/00—Rocket or torpedo launchers
    • F41F3/04—Rocket or torpedo launchers for rockets
    • F41F3/055—Umbilical connecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
    • F42B15/01—Arrangements thereon for guidance or control
    • F42B15/04—Arrangements thereon for guidance or control using wire, e.g. for guiding ground-to-ground rockets

Definitions

  • the invention relates to a method for control the unwinding of a reel, as well as device implementing this method.
  • the method and the device according to the invention allow in particular to access information such as the frequency of unwinding the turns, the number of turns wound, the speed of unwinding the spool, the length of unwound thread, the number of layers of wire unwound from the spool, etc.
  • This process and this device apply to all techniques in which two objects moving away of each other remain connected, at least temporarily, by a wire. He finds an application preferred in the case of guided gear, in which information is transmitted, usually in both directions, between the machine and its firing point, in particular to allow remote control of this gadget.
  • the word “thread” indifferently designates any member capable of being rolled up on a coil, such as an electric wire, a fiber optic, cable, pipe, etc ...
  • the first category is based on the use of optical sensors operating without contact.
  • the second category is based on the break mechanical loops of electrical wires placed in the thickness of the coil.
  • the first category of known devices is illustrated in particular by document FR-A-2 533 689. It this is a particularly complex system which detects marks made on the unwinding cable of a winch. Such a system is practically not usable in the case of a very rapid progress of a very long wire.
  • Figure 1 of the document FR-A-2 675 250 also offers, in the application with wire-guided devices, determine the flight speed of the machine by means of an optical system which detects the presence of marks on the wire. It's about a technique ill-suited to mass production coils of fragile and very long wires. In Indeed, the achievement of the marks on the wire constitutes an extra delicate step, given the fragility of it.
  • Figure 2 illustrates the second category of devices known to carry out the monitoring of the unwinding of a reel.
  • This second category of devices is also illustrated by the document FR-A-1 308 884.
  • loops made of electrically conductive material in the coil, at predetermined levels.
  • the wire unwinding leads to successive breakage of each of the loops.
  • the wire feed control procedures belonging to this second category also present themselves many disadvantages.
  • integration of a number of loops electrically conductive in the coil is hardly compatible with mass production series.
  • the presence of these loops is results in increased reel resistance, which risk of breaking the wire when it is very fragile.
  • the main object of the invention is a method new, allowing to control the progress of a coil without the need to perform any prior marking on the wire, and without interference mechanical with the coil or its protective cover, so that the use of this process is without impact on coil manufacturing and wire unwinding.
  • this process using an audible signal allows non-contact measurement with wire and coil. he therefore has no influence on the course of this last. In addition, it does not require visual access to the coil, so that it allows the presence of a hood. In addition, no prior marking of the wire is necessary.
  • this process does not require either to introduce loops of material electrically conductor inside the coil. It does not increase therefore no risk of wire breakage during unfolding. Furthermore, it does not have to be taken into account during the manufacture of the coils.
  • the sound signal is picked up at a location laterally offset from the axis of the reel and located near a feed end of the latter.
  • the information related to the frequency of wire feed is chosen from the group comprising: the frequency of unwinding the coil turns, the number of turns the unwinding speed of the reel, the length of wire unwound from the spool, the number of layers of wire unwound from the spool, and the speed of relative displacement between two objects linked by the wire.
  • the means for picking up the signal sound include a microphone, preferably placed on the side of the spool, near one end unwinding the latter.
  • the microphone can also be located near the coil or inside of the wound core.
  • These means further include a sound level meter transforming a generated pressure signal by the microphone into an electrical signal constituting said periodic signal.
  • the processing means include a converter frequency-voltage connected to the output of means for picking up the sound signal and delivering a signal representative of the frequency of coil turns.
  • the processing means can further understand a multiplier circuit connected to the output of the frequency-voltage converter, multiplying the signal representative of the frequency of unwinding of the turns by a corresponding coefficient the length of a turn, and delivering a representative signal the reel unwinding speed.
  • the means of treatment can also include an integrator circuit connected to the circuit output multiplier and delivering a signal representative of the length of wire unwound from the spool.
  • the processing means include a counter of pulses connected to the output of the means for picking up the sound signal and delivering a representative signal the number of turns unwound from the coil.
  • the processing means can further understand a multiplier circuit connected to the output of the pulse counter, multiplying the signal representative of the number of turns unwound by a coefficient corresponding to the length of a turn, and delivering a signal representative of the length of wire unwound from the spool.
  • the reference 10 designates so generally a coil such as a coil on board a wire-guided vehicle.
  • This coil has a mandrel 12 on which is wound a wire 14 shown during unfolding.
  • the coil 10 further comprises a cover protection 16 which surrounds the wound wire and does not allow the unwinding of the wire 14 only by one end of the coil, turned to the left in Figure 1.
  • a long length of wire 14 (several tens of kilometers) is wound on the mandrel 12 and the unwinding takes place at high speed.
  • the thread produced a noise which has a periodic character.
  • the duration of the period of this noise is equal to the time taken by the wire to unwind a turn of the coil 10.
  • the invention is based on this observation and consists in receiving the sound signal corresponding to this noise, then treat it to deduce one or more several pieces of information related to the frequency of wire feed turns of the coil 10 such as the speed of unwinding of the reel, the length of the thread unwound, etc ...
  • the microphone 18 is placed near coil 10 a microphone 18. More precisely, the microphone 18 is placed on the side of the coil 10, outside the cover 16, at a location laterally offset from the axis of the coil. In addition, the microphone 18 is placed close from the end of the coil 10 to which the wire 14 unwinds, i.e. near the end left of the spool in Figure 1.
  • Microphone 18 transforms the sound signal produced by unwinding the wire 14 into a pressure signal P (in ⁇ bars) whose evolution as a function of time t (in milliseconds) is illustrated as an example on Figure 2.
  • the pressure signal delivered by the microphone 18 oscillates between pressure values positive and negative according to a period T substantially equal to 4 ms. This means that a turn of wire 14 is unwound from coil 10 in 4 ms.
  • T substantially equal to 4 ms.
  • the pressure signal delivered by the microphone 18 is transmitted to a sound level meter 20 which transforms it into a electrical signal whose amplitude varies according to amplitude variations of the pressure signal admitted in this sound level meter.
  • the output of the sound level meter 20 is connected to a frequency / voltage converter 22 which outputs a signal whose amplitude is representative of the frequency of unwinding of the turns of the coil 10.
  • Figure 3 shows by way of example the variations of the signal f (in Hz) delivered by the converter frequency / voltage 22, as a function of time t (in ms).
  • the frequency of unwinding turns usually stays between 240 Hz and 260 Hz.
  • the output of the frequency / voltage converter is connected 22 to a multiplier circuit 24.
  • This circuit 24 multiplies the signal f delivered by the converter 22 by a coefficient corresponding to the length of a turn of the reel 10. Since this length varies according to the layer of wire being unfolding, a different coefficient is preferably applied for each layer of the coil. All coefficients of a determined coil 10 is memorized before the launch of the machine as well as the number of turns corresponding to each of the layers, so that the coefficient is automatically adapted as the wire unwinds 14.
  • the signal representative of the unwinding speed of the coil 10, delivered by the multiplier circuit 24, can also be used to calculate the length of wire 14 unwound from coil 10.
  • the signal from the multiplier circuit 24 is injected into a integrator circuit 26 whose output is representative of this length of wire unwound from the spool.
  • the microphone 18 picks up in continuous the sound signal produced by the course of the wire 14.
  • the means of treatment constituted by the frequency / voltage converter 22, the multiplier circuit 24 and the integrator circuit 26 continuously process the sound signal received by the microphone 18, so as to deduce therefrom an evolution of the frequency of unwinding the coil 10 as a function of the time as well as the corresponding evolutions of the reel unwinding speed and length of wire unwound as a function of time.
  • Figure 4 shows a set of measures comparable to the one just described with reference in Figure 1, but in which the processing of signal delivered by the sound level meter 20 takes place so different.
  • the microphone 18 is placed in the same way as above with respect to to coil 10.
  • the pressure signal delivered by microphone 18 is transformed into a signal electric by a sound level meter 20.
  • the electrical signal delivered by the sound level meter 20 is transmitted to a counter of pulses 28.
  • This pulse counter 28 delivers a output signal whose amplitude is representative of the evolution of the number of turns unwound from the reel 10, as a function of time.
  • This signal from the pulse counter 28 is injected into a multiplier circuit 30 which can be identical to the multiplier circuit 24 used in the first embodiment described with reference to Figure 1.
  • This multiplier circuit 30 allows, as the previous, multiply the input signal by a coefficient corresponding to the length of a turn of the thread 14 in progress.
  • the output of this circuit multiplier 30 is then representative of the length of wire unwound from coil 10 since the signal injected into the multiplier circuit is itself representative of the number of coils wound.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Description

L'invention concerne un procédé permettant de contrôler le déroulement d'une bobine, ainsi qu'un dispositif mettant en oeuvre ce procédé.The invention relates to a method for control the unwinding of a reel, as well as device implementing this method.

Le procédé et le dispositif selon l'invention permettent notamment d'accéder à des informations telles que la fréquence de dévidage des spires, le nombre de spires dévidées, la vitesse de déroulement de la bobine, la longueur de fil déroulée, le nombre de couches de fil dévidées de la bobine, etc...The method and the device according to the invention allow in particular to access information such as the frequency of unwinding the turns, the number of turns wound, the speed of unwinding the spool, the length of unwound thread, the number of layers of wire unwound from the spool, etc.

Ce procédé et ce dispositif s'appliquent à toutes les techniques dans lesquelles deux objets s'éloignant l'un de l'autre restent reliés, au moins temporairement, par un fil. Il trouve une application privilégiée dans le cas des engins filoguidés, dans lesquels des informations sont transmises, généralement dans les deux sens, entre l'engin et son poste de tir, afin notamment de permettre un pilotage à distance de cet engin.This process and this device apply to all techniques in which two objects moving away of each other remain connected, at least temporarily, by a wire. He finds an application preferred in the case of guided gear, in which information is transmitted, usually in both directions, between the machine and its firing point, in particular to allow remote control of this gadget.

Dans l'ensemble de la demande, le mot "fil" désigne indifféremment tout organe apte à être enroulé sur une bobine, tel qu'un fil électrique, une fibre optique, un câble, un tuyau, etc...Throughout the application, the word "thread" indifferently designates any member capable of being rolled up on a coil, such as an electric wire, a fiber optic, cable, pipe, etc ...

Les dispositifs connus qui permettent de contrôler le déroulement d'une bobine peuvent être classés en deux catégories. La première catégorie repose sur l'utilisation de capteurs optiques fonctionnant sans contact. La seconde catégorie repose sur la rupture mécanique de boucles de fils électriques placés dans l'épaisseur de la bobine. Known devices which make it possible to control the unwinding of a reel can be classified in two categories. The first category is based on the use of optical sensors operating without contact. The second category is based on the break mechanical loops of electrical wires placed in the thickness of the coil.

La première catégorie de dispositifs connus est illustrée notamment par le document FR-A-2 533 689. Il s'agit d'un système particulièrement complexe qui détecte des marques faites sur le câble qui se déroule d'un treuil. Un tel système n'est pratiquement pas utilisable dans le cas du déroulement très rapide d'un fil de grande longueur.The first category of known devices is illustrated in particular by document FR-A-2 533 689. It this is a particularly complex system which detects marks made on the unwinding cable of a winch. Such a system is practically not usable in the case of a very rapid progress of a very long wire.

La forme de réalisation de la figure 1 du document FR-A-2 675 250 propose également, dans l'application aux engins filoguidés, de déterminer la vitesse de vol de l'engin au moyen d'un système optique qui détecte la présence de repères sur le fil. Il s'agit d'une technique mal adaptée à la fabrication en grande série de bobines de fils fragiles et de grande longueur. En effet, la réalisation des repères sur le fil constitue une étape supplémentaire délicate, compte tenu de la fragilité de celui-ci.The embodiment of Figure 1 of the document FR-A-2 675 250 also offers, in the application with wire-guided devices, determine the flight speed of the machine by means of an optical system which detects the presence of marks on the wire. It's about a technique ill-suited to mass production coils of fragile and very long wires. In Indeed, the achievement of the marks on the wire constitutes an extra delicate step, given the fragility of it.

Dans le document FR-A-2 675 250, la forme de réalisation de la figure 2 illustre la deuxième catégorie de dispositifs connus pour procéder à la surveillance du dévidage d'une bobine. Cette deuxième catégorie de dispositifs est également illustrée par le document FR-A-1 308 884. Dans les deux cas, des boucles en un matériau électriquement conducteur sont noyées dans la bobine, à des niveaux prédéterminés. Le dévidage du fil conduit à la rupture successive de chacune des boucles. La détection de l'ouverture des différents circuits électriques dans lesquels ces boucles sont intégrées permet de connaítre la longueur de fil dévidée et d'en déduire différentes informations telles que la vitesse de déplacement de l'engin sur lequel est embarqué la bobine.In document FR-A-2 675 250, the form of Figure 2 illustrates the second category of devices known to carry out the monitoring of the unwinding of a reel. This second category of devices is also illustrated by the document FR-A-1 308 884. In both cases, loops made of electrically conductive material in the coil, at predetermined levels. The wire unwinding leads to successive breakage of each of the loops. The detection of the opening of different electrical circuits in which these loops are integrated to know the length of wire unwound and deducing different information such as the speed of movement of the machine on which is loaded the coil.

Les procédés de contrôle de dévidage de fil appartenant à cette deuxième catégorie présentent eux-aussi de nombreux inconvénients. En premier lieu, l'intégration d'un certain nombre de boucles électriquement conductrices dans la bobine est difficilement compatible avec une fabrication en grande série. Par ailleurs, la présence de ces boucles se traduit par une résistance au dévidage accrue, qui risque d'entraíner la rupture du fil lorsque celui-ci est très fragile.The wire feed control procedures belonging to this second category also present themselves many disadvantages. In the first place, integration of a number of loops electrically conductive in the coil is hardly compatible with mass production series. Furthermore, the presence of these loops is results in increased reel resistance, which risk of breaking the wire when it is very fragile.

L'invention a principalement pour objet un procédé nouveau, permettant de contrôler le déroulement d'une bobine sans qu'il soit nécessaire d'effectuer aucun marquage préalable sur le fil, et sans interférence mécanique avec la bobine ou son capot de protection, de telle sorte que l'utilisation de ce procédé soit sans incidence sur la fabrication de la bobine et sur le dévidage du fil.The main object of the invention is a method new, allowing to control the progress of a coil without the need to perform any prior marking on the wire, and without interference mechanical with the coil or its protective cover, so that the use of this process is without impact on coil manufacturing and wire unwinding.

Selon l'invention, ce résultat est obtenu au moyen d'un procédé de contrôle du déroulement d'une bobine, caractérisé par le fait qu'il consiste à :

  • capter un signal sonore produit par le déroulement de la bobine ; et
  • traiter ce signal sonore pour en déduire au moins une information liée à la fréquence de dévidage des spires de la bobine.
According to the invention, this result is obtained by means of a process for controlling the unwinding of a reel, characterized in that it consists in:
  • receive an audible signal produced by the unwinding of the reel; and
  • process this sound signal to deduce therefrom at least one item of information related to the frequency of unwinding of the turns of the coil.

Comme les procédés utilisant un signal optique, ce procédé utilisant un signal sonore permet d'effectuer une mesure sans contact avec le fil et la bobine. Il n'a donc aucune influence sur le déroulement de cette dernière. De plus, il ne nécessite pas un accès visuel à la bobine, de sorte qu'il autorise la présence d'un capot. En outre, aucun marquage préalable du fil n'est nécessaire.Like processes using an optical signal, this process using an audible signal allows non-contact measurement with wire and coil. he therefore has no influence on the course of this last. In addition, it does not require visual access to the coil, so that it allows the presence of a hood. In addition, no prior marking of the wire is necessary.

Par ailleurs, ce procédé ne nécessite pas non plus d'introduire des boucles en matériau électriquement conducteur à l'intérieur de la bobine. Il n'augmente donc pas les risques de cassure du fil lors de son déroulement. En outre, il n'a pas à être pris en compte lors de la fabrication des bobines.Furthermore, this process does not require either to introduce loops of material electrically conductor inside the coil. It does not increase therefore no risk of wire breakage during unfolding. Furthermore, it does not have to be taken into account during the manufacture of the coils.

Dans une forme de réalisation préférentielle de l'invention, on capte le signal sonore en un emplacement décalé latéralement par rapport à l'axe de la bobine et situé à proximité d'une extrémité de dévidage de cette dernière.In a preferred embodiment of the invention, the sound signal is picked up at a location laterally offset from the axis of the reel and located near a feed end of the latter.

De préférence, on capte et on traite le signal sonore en continu, pour en déduire une évolution, en fonction du temps, de l'information liée à la fréquence de dévidage.Preferably, we receive and process the signal continuous sound, to deduce an evolution, time function, frequency related information unwinding.

L'information liée à la fréquence de dévidage est choisie dans le groupe comprenant : la fréquence de dévidage des spires de la bobine, le nombre de spires dévidées, la vitesse de déroulement de la bobine, la longueur de fil déroulée de la bobine, le nombre de couches de fil dévidées de la bobine, et la vitesse de déplacement relatif entre deux objets liés par le fil.The information related to the frequency of wire feed is chosen from the group comprising: the frequency of unwinding the coil turns, the number of turns the unwinding speed of the reel, the length of wire unwound from the spool, the number of layers of wire unwound from the spool, and the speed of relative displacement between two objects linked by the wire.

L'invention a aussi pour objet un dispositif de contrôle du déroulement d'une bobine, caractérisé en ce qu'il comprend :

  • des moyens pour capter un signal sonore produit par le déroulement de la bobine ; et
  • des moyens de traitement pour traiter un signal périodique délivré par les moyens pour capter le signal sonore, afin d'en déduire au moins une information liée à la fréquence de dévidage des spires de la bobine.
The invention also relates to a device for controlling the unwinding of a reel, characterized in that it comprises:
  • means for picking up an audible signal produced by the unwinding of the reel; and
  • processing means for processing a periodic signal delivered by the means for picking up the sound signal, in order to deduce therefrom at least one item of information related to the frequency of unwinding of the turns of the coil.

Avantageusement, les moyens pour capter le signal sonore comprennent un microphone, placé préférentiellement sur le côté de la bobine, à proximité d'une extrémité de dévidage de cette dernière. Le microphone peut aussi se situer à proximité de la bobine ou à l'intérieur du noyau bobiné.Ces moyens comprennent de plus un sonomètre transformant un signal de pression engendré par le microphone en un signal électrique constituant ledit signal périodique.Advantageously, the means for picking up the signal sound include a microphone, preferably placed on the side of the spool, near one end unwinding the latter. The microphone can also be located near the coil or inside of the wound core. These means further include a sound level meter transforming a generated pressure signal by the microphone into an electrical signal constituting said periodic signal.

Dans une première forme de réalisation de l'invention, les moyens de traitement comprennent un convertisseur fréquence-tension connecté à la sortie des moyens pour capter le signal sonore et délivrant un signal représentatif de la fréquence de déroulement des spires de la bobine.In a first embodiment of the invention, the processing means include a converter frequency-voltage connected to the output of means for picking up the sound signal and delivering a signal representative of the frequency of coil turns.

Dans ce cas, les moyens de traitement peuvent comprendre de plus un circuit multiplicateur connecté à la sortie du convertisseur fréquence-tension, multipliant le signal représentatif de la fréquence de déroulement des spires par un coefficient correspondant à la longueur d'une spire, et délivrant un signal représentatif de la vitesse de déroulement de la bobine.In this case, the processing means can further understand a multiplier circuit connected to the output of the frequency-voltage converter, multiplying the signal representative of the frequency of unwinding of the turns by a corresponding coefficient the length of a turn, and delivering a representative signal the reel unwinding speed.

Les moyens de traitement peuvent aussi comprendre un circuit intégrateur connecté à la sortie du circuit multiplicateur et délivrant un signal représentatif de la longueur de fil déroulée de la bobine.The means of treatment can also include an integrator circuit connected to the circuit output multiplier and delivering a signal representative of the length of wire unwound from the spool.

Dans une deuxième forme de réalisation de l'invention, les moyens de traitement comprennent un compteur d'impulsions connecté à la sortie des moyens pour capter le signal sonore et délivrant un signal représentatif du nombre de spires déroulées de la bobine.In a second embodiment of the invention, the processing means include a counter of pulses connected to the output of the means for picking up the sound signal and delivering a representative signal the number of turns unwound from the coil.

Dans ce cas, les moyens de traitement peuvent comprendre de plus un circuit multiplicateur connecté à la sortie du compteur d'impulsions, multipliant le signal représentatif du nombre de spires déroulées par un coefficient correspondant à la longueur d'une spire, et délivrant un signal représentatif de la longueur de fil déroulée de la bobine.In this case, the processing means can further understand a multiplier circuit connected to the output of the pulse counter, multiplying the signal representative of the number of turns unwound by a coefficient corresponding to the length of a turn, and delivering a signal representative of the length of wire unwound from the spool.

On décrira à présent, à titre d'exemples non limitatifs, deux formes de réalisation préférentielles de l'invention, en se référant aux dessins annexés, dans lesquels :

  • la figure 1 est un schéma synoptique illustrant une première forme de réalisation d'un dispositif de contrôle du déroulement d'une bobine, conforme à l'invention ;
  • la figure 2 est une courbe représentant les variations, en fonction du temps t (en millisecondes), du signal de pression P (en µ bars) issu du microphone dans le dispositif de contrôle de la figure 1 ;
  • la figure 3 est une courbe représentant les variations, en fonction du temps t (en millisecondes), du signal de fréquence f (en Hertz) délivré par le convertisseur fréquence/tension du dispositif de contrôle illustré sur la figure 1 ; et
  • la figure 4 est un schéma synoptique comparable à la figure 1 illustrant une deuxième forme de réalisation d'un dispositif de contrôle selon l'invention.
Two preferred embodiments of the invention will now be described, by way of non-limiting examples, with reference to the appended drawings, in which:
  • Figure 1 is a block diagram illustrating a first embodiment of a device for controlling the unwinding of a coil, according to the invention;
  • FIG. 2 is a curve representing the variations, as a function of time t (in milliseconds), of the pressure signal P (in μ bars) coming from the microphone in the control device of FIG. 1;
  • FIG. 3 is a curve representing the variations, as a function of time t (in milliseconds), of the frequency signal f (in Hertz) delivered by the frequency / voltage converter of the control device illustrated in FIG. 1; and
  • Figure 4 is a block diagram comparable to Figure 1 illustrating a second embodiment of a control device according to the invention.

Sur la figure 1, la référence 10 désigne de façon générale une bobine telle qu'une bobine embarquée sur un engin filoguidé. Cette bobine comporte un mandrin 12 sur lequel est enroulé un fil 14 représenté en cours de déroulement. La bobine 10 comprend en outre un capot de protection 16 qui entoure le fil bobiné et n'autorise le dévidage du fil 14 que par une extrémité de la bobine, tournée vers la gauche sur la figure 1.In FIG. 1, the reference 10 designates so generally a coil such as a coil on board a wire-guided vehicle. This coil has a mandrel 12 on which is wound a wire 14 shown during unfolding. The coil 10 further comprises a cover protection 16 which surrounds the wound wire and does not allow the unwinding of the wire 14 only by one end of the coil, turned to the left in Figure 1.

Dans l'application à un engin filoguidé, une grande longueur de fil 14 (plusieurs dizaines de kilomètres) est enroulée sur le mandrin 12 et le dévidage s'effectue à grande vitesse.In the application to a guided vehicle, a long length of wire 14 (several tens of kilometers) is wound on the mandrel 12 and the unwinding takes place at high speed.

Lors de ce dévidage à grande vitesse, le fil produit un bruit qui présente un caractère périodique. La durée de la période de ce bruit est égale au temps mis par le fil pour dévider une spire de la bobine 10.During this high-speed unwinding, the thread produced a noise which has a periodic character. The duration of the period of this noise is equal to the time taken by the wire to unwind a turn of the coil 10.

L'invention repose sur cette observation et consiste à capter le signal sonore correspondant à ce bruit, puis à le traiter pour en déduire une ou plusieurs informations liées à la fréquence de dévidage des spires de la bobine 10 telles que la vitesse de déroulement de la bobine, la longueur de fil déroulée, etc...The invention is based on this observation and consists in receiving the sound signal corresponding to this noise, then treat it to deduce one or more several pieces of information related to the frequency of wire feed turns of the coil 10 such as the speed of unwinding of the reel, the length of the thread unwound, etc ...

Afin de capter le signal sonore correspondant au bruit émis par le fil 14 lors de son dévidage, on place à proximité de la bobine 10 un microphone 18. Plus précisément, le microphone 18 est placé sur le côté de la bobine 10, à l'extérieur du capot 16, en un emplacement décalé latéralement par rapport à l'axe de la bobine. De plus, le microphone 18 est placé à proximité de l'extrémité de la bobine 10 vers laquelle le fil 14 se dévide, c'est-à-dire à proximité de l'extrémité gauche de la bobine sur la figure 1.In order to receive the sound signal corresponding to the noise emitted by the wire 14 during its unwinding, we place near coil 10 a microphone 18. More precisely, the microphone 18 is placed on the side of the coil 10, outside the cover 16, at a location laterally offset from the axis of the coil. In addition, the microphone 18 is placed close from the end of the coil 10 to which the wire 14 unwinds, i.e. near the end left of the spool in Figure 1.

Le microphone 18 transforme le signal sonore produit par le dévidage du fil 14 en un signal de pression P (en µ bars) dont l'évolution en fonction du temps t (en millisecondes) est illustrée à titre d'exemple sur la figure 2. Dans l'exemple de mesure illustré par cette figure, le signal de pression délivré par le microphone 18 oscille entre des valeurs de pression positive et négative selon une période T sensiblement égale à 4 ms. Cela signifie qu'une spire du fil 14 est dévidée de la bobine 10 en 4 ms. On comprend que l'exploitation de cette mesure permet d'en déduire des informations telles que la fréquence de dévidage des spires, la vitesse de déroulement de la bobine, la longueur de fil déroulée, etc...Microphone 18 transforms the sound signal produced by unwinding the wire 14 into a pressure signal P (in µ bars) whose evolution as a function of time t (in milliseconds) is illustrated as an example on Figure 2. In the measurement example illustrated by this figure, the pressure signal delivered by the microphone 18 oscillates between pressure values positive and negative according to a period T substantially equal to 4 ms. This means that a turn of wire 14 is unwound from coil 10 in 4 ms. We understand that the exploitation from this measurement allows to deduce information such as how often turns, the unwinding speed of the reel, the length of unwound wire, etc ...

Le signal de pression délivré par le microphone 18 est transmis à un sonomètre 20 qui le transforme en un signal électrique dont l'amplitude varie selon les variations d'amplitude du signal de pression admis dans ce sonomètre.The pressure signal delivered by the microphone 18 is transmitted to a sound level meter 20 which transforms it into a electrical signal whose amplitude varies according to amplitude variations of the pressure signal admitted in this sound level meter.

La sortie du sonomètre 20 est connectée à un convertisseur fréquence/tension 22 qui délivre en sortie un signal dont l'amplitude est représentative de la fréquence de déroulement des spires de la bobine 10.The output of the sound level meter 20 is connected to a frequency / voltage converter 22 which outputs a signal whose amplitude is representative of the frequency of unwinding of the turns of the coil 10.

La figure 3 représente à titre d'exemple les variations du signal f (en Hz) délivré par le convertisseur fréquence/tension 22, en fonction du temps t (en ms). Dans cet exemple, la fréquence de déroulement des spires reste généralement comprise entre 240 Hz et 260 Hz.Figure 3 shows by way of example the variations of the signal f (in Hz) delivered by the converter frequency / voltage 22, as a function of time t (in ms). In this example, the frequency of unwinding turns usually stays between 240 Hz and 260 Hz.

Comme on l'a représenté sur la figure 1, lorsqu'on désire connaítre la vitesse de déroulement du fil 14, on raccorde la sortie du convertisseur fréquence/tension 22 à un circuit multiplicateur 24. Ce circuit 24 multiplie le signal f délivré par le convertisseur 22 par un coefficient correspondant à la longueur d'une spire de la bobine 10. Etant donné que cette longueur varie selon la couche de fil en cours de déroulement, un coefficient différent est de préférence appliqué pour chacune des couches de la bobine. L'ensemble des coefficients d'une bobine 10 déterminée est mis en mémoire avant le lancement de l'engin ainsi que le nombre de spires correspondant à chacune des couches, afin que le coefficient soit automatiquement adapté au fur et à mesure du déroulement du fil 14.As shown in Figure 1, when want to know the speed of unwinding of the wire 14, the output of the frequency / voltage converter is connected 22 to a multiplier circuit 24. This circuit 24 multiplies the signal f delivered by the converter 22 by a coefficient corresponding to the length of a turn of the reel 10. Since this length varies according to the layer of wire being unfolding, a different coefficient is preferably applied for each layer of the coil. All coefficients of a determined coil 10 is memorized before the launch of the machine as well as the number of turns corresponding to each of the layers, so that the coefficient is automatically adapted as the wire unwinds 14.

Dans la configuration illustrée sur la figure 1, le signal représentatif de la vitesse de déroulement de la bobine 10, délivré par le circuit multiplicateur 24, peut aussi être utilisé pour calculer la longueur de fil 14 déroulée de la bobine 10. A ce effet, le signal issu du circuit multiplicateur 24 est injecté dans un circuit intégrateur 26 dont la sortie est représentative de cette longueur de fil déroulée de la bobine.In the configuration illustrated in Figure 1, the signal representative of the unwinding speed of the coil 10, delivered by the multiplier circuit 24, can also be used to calculate the length of wire 14 unwound from coil 10. For this purpose, the signal from the multiplier circuit 24 is injected into a integrator circuit 26 whose output is representative of this length of wire unwound from the spool.

Il est à noter que le microphone 18 capte en continu le signal sonore produit par le déroulement du fil 14. De façon comparable, les moyens de traitement constitués par le convertisseur fréquence/tension 22, le circuit multiplicateur 24 et le circuit intégrateur 26 traitent en continu le signal sonore capté par le microphone 18, de façon à en déduire une évolution de la fréquence de dévidage de la bobine 10 en fonction du temps ainsi que les évolutions correspondantes de la vitesse de déroulement de la bobine et de la longueur de fil déroulée en fonction du temps.It should be noted that the microphone 18 picks up in continuous the sound signal produced by the course of the wire 14. In a comparable way, the means of treatment constituted by the frequency / voltage converter 22, the multiplier circuit 24 and the integrator circuit 26 continuously process the sound signal received by the microphone 18, so as to deduce therefrom an evolution of the frequency of unwinding the coil 10 as a function of the time as well as the corresponding evolutions of the reel unwinding speed and length of wire unwound as a function of time.

La figure 4 représente un ensemble de mesures comparable à celui qui vient d'être décrit en se référant à la figure 1, mais dans lequel le traitement du signal délivré par le sonomètre 20 s'effectue de manière différente.Figure 4 shows a set of measures comparable to the one just described with reference in Figure 1, but in which the processing of signal delivered by the sound level meter 20 takes place so different.

Dans cette forme de réalisation, le microphone 18 est placé de la même manière que précédemment par rapport à la bobine 10. En outre, le signal de pression délivré par le microphone 18 est transformé en un signal électrique par un sonomètre 20.In this embodiment, the microphone 18 is placed in the same way as above with respect to to coil 10. In addition, the pressure signal delivered by microphone 18 is transformed into a signal electric by a sound level meter 20.

Cependant, au lieu d'être introduit dans un convertisseur fréquence/tension comme dans la première forme de réalisation décrite, le signal électrique délivré par le sonomètre 20 est transmis à un compteur d'impulsions 28. Ce compteur d'impulsions 28 délivre un signal de sortie dont l'amplitude est représentative de l'évolution du nombre de spires dévidées de la bobine 10, en fonction du temps.However, instead of being introduced into a frequency / voltage converter as in the first described embodiment, the electrical signal delivered by the sound level meter 20 is transmitted to a counter of pulses 28. This pulse counter 28 delivers a output signal whose amplitude is representative of the evolution of the number of turns unwound from the reel 10, as a function of time.

Ce signal issu du compteur d'impulsions 28 est injecté dans un circuit multiplicateur 30 qui peut être identique au circuit multiplicateur 24 utilisé dans la première forme de réalisation décrite en référence à la figure 1. Ce circuit multiplicateur 30 permet, comme le précédent, de multiplier le signal d'entrée par un coefficient correspondant à la longueur d'une spire du fil 14 en cours de déroulement. La sortie de ce circuit multiplicateur 30 est alors représentative de la longueur de fil déroulée de la bobine 10 puisque le signal injecté dans le circuit multiplicateur est lui-même représentatif du nombre de spires dévidées.This signal from the pulse counter 28 is injected into a multiplier circuit 30 which can be identical to the multiplier circuit 24 used in the first embodiment described with reference to Figure 1. This multiplier circuit 30 allows, as the previous, multiply the input signal by a coefficient corresponding to the length of a turn of the thread 14 in progress. The output of this circuit multiplier 30 is then representative of the length of wire unwound from coil 10 since the signal injected into the multiplier circuit is itself representative of the number of coils wound.

Bien entendu, d'autres modes de traitement des signaux délivrés par le sonomètre 20 peuvent être envisagés, selon les informations désirées par l'utilisateur, sans sortir du cadre de l'invention.Of course, other methods of processing signals delivered by the sound level meter 20 can be envisaged, according to the information desired by the user, without departing from the scope of the invention.

Claims (13)

  1. Method of monitoring the unwinding of a reel (10), characterized in that it consists in:
    picking up an acoustic signal produced by the unwinding of the reel (10); and
    processing this acoustic signal in order to deduce therefrom at least one item of information relating to the pay-out frequency of the turns of the reel.
  2. Method according to Claim 1, characterized in that the acoustic signal is picked up at a point which is laterally offset with respect to the axis of the reel (10).
  3. Method according to either of Claims 1 and 2, characterized in that the acoustic signal is picked up near a pay-out end of the reel (10).
  4. Method according to any one of Claims 1 to 3, characterized in that the acoustic signal is picked up and processed continuously, in order to deduce therefrom a change over time in the information relating to the pay-out frequency.
  5. Method according to any one of the preceding claims, characterized in that the information relating to the pay-out frequency is chosen from the group comprising: the pay-out frequency of the turns of the reel (10), the number of turns paid out, the rate of unwinding of the reel (10), the length of wire (14) unwound from the reel (10), the number of wire layers (14) paid out from the reel (10) and the speed of relative movement between two objects connected by the wire (14).
  6. Device for monitoring the unwinding of a reel (10), characterized in that it comprises:
    means (18, 20) for picking up an acoustic signal produced by the unwinding of the reel (10); and
    processing means (22, 24, 26; 28, 30) for processing a periodic signal delivered by the means for picking up the acoustic signal, so as to deduce therefrom at least one item of information relating to the pay-out frequency of the turns of the reel (10).
  7. Device according to Claim 6, characterized in that the means for picking up the acoustic signal comprise a microphone (18).
  8. Device according to Claim 7, characterized in that the means for picking up the acoustic signal additionally comprise a sonometer (20) which converts a pressure signal generated by the microphone (18) into an electrical signal constituting the said periodic signal.
  9. Device according to any one of Claims 6 to 8, characterized in that the processing means comprise a frequency-voltage converter (22) connected to the output of the means (18, 20) for picking up the acoustic signal and delivering a signal representative of the unwinding frequency of the turns of the reel (10).
  10. Device according to Claim 9, characterized in that the processing means additionally comprise a multiplier circuit (24) connected to the output of the frequency-voltage converter, multiplying the signal representative of the unwinding frequency of the turns by a coefficient corresponding to the length of one turn, and delivering a signal representative of the rate of unwinding of the reel (10).
  11. Device according to Claim 10, characterized in that the processing means additionally comprise an integrator circuit (26) connected to the output of the multiplier circuit (24) and delivering a signal representative of the length of wire (14) unwound from the reel (10).
  12. Device according to any one of Claims 6 to 8, characterized in that the processing means comprise a pulse counter (28) connected to the output of the means (18, 20) for picking up the acoustic signal and delivering a signal representative of the number of turns unwound from the reel (10).
  13. Device according to Claim 12, characterized in that the processing means additionally comprise a multiplier circuit (30) connected to the output of the pulse counter (28), multiplying the signal representative of the number of turns unwound by a coefficient corresponding to the length of one turn, and delivering a signal representative of the length of wire (14) unwound from the reel (10).
EP19950401965 1994-08-30 1995-08-28 Method and device for monitoring the unwinding of a bobbin Expired - Lifetime EP0699614B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9410425A FR2724014A1 (en) 1994-08-30 1994-08-30 METHOD AND DEVICE FOR MONITORING THE CONDUCT OF A COIL.
FR9410425 1994-08-30

Publications (2)

Publication Number Publication Date
EP0699614A1 EP0699614A1 (en) 1996-03-06
EP0699614B1 true EP0699614B1 (en) 1998-12-09

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EP19950401965 Expired - Lifetime EP0699614B1 (en) 1994-08-30 1995-08-28 Method and device for monitoring the unwinding of a bobbin

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EP (1) EP0699614B1 (en)
DE (1) DE69506498T2 (en)
ES (1) ES2126849T3 (en)
FR (1) FR2724014A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965555A1 (en) * 1998-06-16 1999-12-22 Thomas Lammers Roll of web material with means to generate a signal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1308884A (en) 1960-12-20 1962-11-09 Bolkow Entwicklungen Kg Trigger device mounted on a body controlled remotely by means of a metal wire
JPS57196157A (en) * 1981-05-28 1982-12-02 Mitsubishi Electric Corp Measurement of number of revolution
FR2533689B1 (en) 1982-09-27 1987-04-24 Geoservices METHOD AND APPARATUS FOR MEASURING THE LENGTH OF RUNNING OF A WOUND CABLE ON A WINCH DRUM
IT1238996B (en) * 1990-02-14 1993-09-17 Zugnago Tessile THREAD PRESENCE CONTROL DEVICE FOR THREADERS
DE4112016C1 (en) * 1991-04-12 1992-08-06 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Flight path and/or actual speed detector - uses sensor at circular gap between fixed parts of missile to register speed of unwinding of guiding optical fibre
IL107895A0 (en) * 1993-12-06 1994-08-26 Israel State Acoustic method and device for measuring coil unwinding speed

Also Published As

Publication number Publication date
DE69506498D1 (en) 1999-01-21
DE69506498T2 (en) 1999-09-30
EP0699614A1 (en) 1996-03-06
ES2126849T3 (en) 1999-04-01
FR2724014A1 (en) 1996-03-01
FR2724014B1 (en) 1997-02-14

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