EP2734986B1 - Device for detecting intrusion - Google Patents

Device for detecting intrusion Download PDF

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Publication number
EP2734986B1
EP2734986B1 EP12743699.6A EP12743699A EP2734986B1 EP 2734986 B1 EP2734986 B1 EP 2734986B1 EP 12743699 A EP12743699 A EP 12743699A EP 2734986 B1 EP2734986 B1 EP 2734986B1
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EP
European Patent Office
Prior art keywords
elements
openings
vertical wall
wire
wires
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EP12743699.6A
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German (de)
French (fr)
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EP2734986A1 (en
Inventor
Arnaud Flegeo
Jean-Luc AUVRAY
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Eryma Sas
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Eryma Sas
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Publication of EP2734986A1 publication Critical patent/EP2734986A1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/02—Wire fencing, e.g. made of wire mesh
    • E04H17/127—Stretcher-type wire fencing; Tensioning devices for wire fencing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires

Definitions

  • the present invention relates to a fence or fence section consisting of a sheet of son stretched between posts, and relates more particularly to an intrusion detection device integrated in such a fence to detect intrusions or attempts to intrude into a fence. the area protected by the fence.
  • Intrusion detection is generally based on the detection of the movement of threads of the web, this movement of thread taking place when an individual tries to pass through the fence by removing the wire from its normal position or by cutting it.
  • the son of the sheet are stretched between two end posts and the means for detecting the movement of the son of the sheet are mounted on an intermediate post disposed generally equidistant from the end posts.
  • An independent detector is associated with each wire to detect the movement of the latter.
  • the intermediate post carries support heads mounted oscillating independently of each other and each of which is fixed a thread of the web with tension equalization on each side.
  • a portion of flexible envelope of a chamber filled with a fluid is associated with each of said support heads in such a way that the oscillations of said support head cause deformation of the portion of the flexible envelope which then generates a pressure difference in the fluid.
  • a pressure sensor associated with the chamber is then responsible for generating a signal representative of this pressure difference.
  • the detection means consist of the oscillating mounted support heads, the flexible envelope enclosure and the pressure sensor.
  • the voltage balance on each side of the corresponding support head is broken.
  • the support head pivots about its axis and this pivoting is detected, via the pressure change in the chamber filled with fluid, by the pressure sensor.
  • Each support head functions as an independent detector.
  • This type of installation is also very sensitive to the outside temperature which can lead to dilation and / or contraction of the wires and poles and, in the same manner as before, move the support heads away from their normal position.
  • the current solution is to increase the stability of the posts by adding struts and / or over-dimensioning the concrete pads in which they are sealed. This solution is however ineffective compared to the expansion and compression of the son and / or poles and is also very expensive to implement.
  • US 4,683,356 discloses an intrusion detection device for a fence wire web consisting of two end posts between which the wires are stretched substantially horizontally, having detection means adapted to detect the movement of at least one wire with respect to other wires, said detection means comprising a first element and a second element mounted one above the other and each of which is fixed a corresponding wire, said first and second elements being able to move in translation and in rotation relative to each other, and a detecting member for detecting movement of the first member relative to the second member.
  • the first and the second elements are, however, substantially different from each other.
  • An object of the invention is to provide a detection device which is robust to field movements and temperature changes, simple and inexpensive to implement.
  • any tensile force exerted on one of the wires at a point thereof, located between the end posts causes a displacement in translation and / or in rotation of the corresponding element with respect to an element placed below and / or a member placed above, which displacement is detected by the detection member.
  • said first and second elements are substantially in contact with each other.
  • each of said first and second elements is free to rotate about a substantially vertical axis of rotation.
  • Said first and second elements are for example rotatable about a substantially vertical axial rod extending along said axis of rotation, which axial rod is assembled to an intermediate pole placed between said end posts.
  • each of said first and second elements advantageously has a recessed or I-shaped configuration.
  • Each of said first and second elements then has a vertical wall to which is attached a corresponding wire and upper and lower horizontal walls. extending from the ends of the vertical wall, said upper and lower horizontal walls being provided with first openings disposed along said axis of rotation for the passage of the axial rod.
  • the first and second elements are coupled together by coupling means so as to be pivotable and / or slide relative to each other along a substantially horizontal axis.
  • the first and second elements also have a recessed or I-shaped configuration, namely each having a vertical wall to which a corresponding wire is attached and upper and lower horizontal walls extending to from the ends of the vertical wall, said means of coupling being assembled to the walls of said first and second elements.
  • the detection member advantageously comprises a sensor cable, sensitive to pressure, passing through the upper and lower horizontal walls of the first and second elements via second openings arranged along a second axis substantially parallel to the axis of rotation, the dimensions of the second openings being substantially equal to the dimensions of the cross section of the detector cable.
  • the second openings of the upper and lower horizontal walls of the element are no longer aligned with the second openings of the other elements, especially with those of adjacent elements placed above and below the element under consideration.
  • the sensor cable then undergoes pressure or compression at its second openings. This compression of the cable indicates that the element has moved and triggers the sending of an alarm signal.
  • the device further comprises at least one shim capable of being introduced into a second opening of the lower and upper horizontal walls of the first and second elements.
  • at least one shim capable of being introduced into a second opening of the lower and upper horizontal walls of the first and second elements.
  • two shims are arranged in the second opening on either side of the sensor cable in the direction of movement of the element. These wedges can be used to adjust the size of the second opening and to adjust the intensity of the compression for a given displacement of the element.
  • each shim has a height greater than the thickness of the lower or upper horizontal wall.
  • the shim has a height twice the thickness of the lower or upper horizontal wall.
  • each of said first and second elements is equipped with an assembly means for fixing the wire corresponding to the vertical wall of the element.
  • the position of the assembly means on the vertical wall is vertically adjustable.
  • the invention also relates to a fence comprising one or more son plies in succession remarkable in that it is equipped with an intrusion detection device as defined above.
  • the invention is described below through three embodiments of the detection device according to the invention each comprising identical or substantially identical elements mounted on one another, able to move in translation and / or in rotation. relative to each other and to which the fence wires are rigidly attached, and a detection member adapted to detect the displacement of an element by relative to the element immediately above and / or immediately below when an external force is applied to the wire attached to this element.
  • a first embodiment is illustrated by the Figures 1 to 10 .
  • the figure 1 is a sheet of stretched son intended to form a fence section whose length is in practice of the order of 50 meters.
  • This fence section is disposed along the perimeter of an area to be protected. It has two end posts PE between which are spread horizontally F son at regular intervals. Equidistant from the end posts PE is an intermediate detector post PI on which the detection device 1 of the invention is mounted. The posts are sealed in concrete pads P cast in the ground. Each post is advantageously surmounted by an additional inclined portion, conventionally referred to as B-bonnet, extending outwardly of the zone to be protected, as shown more particularly in FIG. figure 3 . F wires are also stretched between the flaps of the PE end posts.
  • the intermediate sensor post PI is equipped with a detection device 1 able to detect any displacement of at least one wire relative to another wire.
  • the detection device 1 comprises a plurality of elements 2, identical or substantially identical, rotatable about an axial rod 3 extending along a substantially vertical axis X, said elements being mounted one above the other and each element being substantially in contact with the element immediately above and / or the element immediately below.
  • the axial rod 3, of circular section is fixed by suitable fixing means to the intermediate pole PI.
  • the means of fixing 4 are for example constituted by a U-shaped part 4 whose base is provided with an opening for the passage of the axial rod 3 and whose branches are screwed to the P1 post as shown in more detail in FIG. figure 4 .
  • the elements 2 are rotatable about the axis of rotation X independently of each other.
  • a wire F is fixed to each element 2 by assembly means 27 which will be described later. Any force exerted on the wire F then causes a rotation of the corresponding element 2 around the axis X. This rotational movement is detected by a detection member in the form of a sensor cable 6, visible on the figure 5 , sensitive to pressure.
  • This cable is for example a cable comprising carbon and two copper wires and a high density polyethylene sheath, such as the Mayser cable EKS002_commercialized by the company Mayser. The resistance of this cable varies according to the intensity of the pressure applied to it.
  • This cable is passed through the elements 2 of the device so that, when one of the elements 2 is rotated about the X axis under the effect of a force applied to the corresponding wire F, the sensor cable 6 is compressed at the contact area with the other elements and triggers the sending of an alarm signal.
  • This cable 6 is protected from the animals by a protective cover 28 mounted on each of the elements 2 and visible on the Figures 2 to 4 and the figure 10 .
  • tabs 7 are provided on the device for carrying an outer cover (not shown) extending along the pole PI and to make invisible the detection device.
  • the arrangement of the sensor cable 6 with the elements 2 is more particularly shown to Figures 5 to 9 .
  • the figure 5 is an enlarged view of detail D2 of the figure 3 , in which the protective covers 28 mounted on each of the elements 2 have been removed.
  • the Figures 6 to 9 represent different views of an element 2 traversed by the detector cable 6.
  • Element 2 comprises a vertical wall 20 and two parallel horizontal walls 21, 22 extending from the ends of the vertical wall so as to form a recessed U-shaped or I-shaped part.
  • Circular openings 23 and 24, arranged on the axis X, are formed in the horizontal walls 21, 22 for the passage of the axial rod 3.
  • Other openings, 25 and 26, arranged along an axis Y parallel to the axis X, are formed in the horizontal walls 21, 22 for the passage of the sensor cable 6.
  • the size of the openings 25 and 26 is substantially equal to or slightly greater than the size of the section of the sensor cable 6. As described below, the size of the openings 25 and 26 may be adapted by means of shims.
  • the wire F is fixed rigidly on the vertical wall by an assembly means 27.
  • This assembly means comprises a plate 271 provided in its lower part with a tab 272 extending perpendicular to the plate 271 and intended to come into abutment against the vertical wall 20 or to be introduced into a slot 201 of the vertical wall 20.
  • the plate 271 is connected to the vertical wall by a screw 273 and a nut 274, a slot 201 being formed in the vertical wall for the passage
  • the light 201 is preferably oblong to allow adjustment of the vertical position of the assembly means.
  • the width of the tab 272 is taken slightly less than the width of the light 201 so that the distal end of the tab 272 can be introduced into the light 201.
  • the element 2 is preferably a one-piece piece, obtained for example by molding a plastic material.
  • the element 2 can also be made of metal by folding and drilling a plate. In this second case, it may be difficult to obtain a precise alignment of the openings 23 and 24 and / or the openings 25 and 26 except to have very expensive advanced equipment.
  • the element 2 is made from several pieces, a U-shaped support piece made by folding and two plates 212 and 222.
  • the U-shaped support piece comprises a vertical base 200 and two parallel branches 211 and 221 extending from the ends of the base 200 perpendicular to it.
  • the wafers 212 and 222 are fixed on the external face of the branches 211 and 221 by screws 213 and 223.
  • the horizontal wall 21 of the element 2 is then constituted by the branch 211 and the plate 212, the horizontal wall 22 is formed by the branch 221 and the plate 222 and the base 200 of the support part constitutes the vertical wall 20.
  • the openings 23 and 24 are formed in the branches 211 and 221 of the support part and the apertures 25 and 26 are made in platelets 212 and 222.
  • the vertical wall 20 is advantageously equipped with a bracket 202 extending inwardly of the U along a longitudinal edge of the vertical wall and perpendicular thereto.
  • the protective cover 28 (visible on the figure 10 ) it allows to surround the detector cable 6 to protect it from external pollution and / or dust and / or to prevent foreign bodies, for example animals or branches, from coming into contact with the cable and triggering false alarms.
  • the protective cover 28 comprises a U-shaped body 280 and two legs 281 provided with screws 282 for fixing the cover 28 to the vertical wall 20.
  • rigid shims 260 are advantageously introduced into the opening 26 of the element 2, on either side of the sensor cable 6, in the direction of movement of the element around the axis of rotation, the bar of the T resting by its lower edge on the upper face of the plate 222 and the leg of the T being inserted into the opening 26.
  • the length of the leg of the T is greater than the thickness of the plate 222 so that said leg opens into the opening 25 of the element disposed immediately below.
  • the length of the leg is preferably at least equal to the total thickness of the plates 212 and 222.
  • the device operates as follows. In the absence of any force exerted on the wires F of the fence, the openings 25 and 26 of all the elements 2 are aligned on the Y axis. No pressure is exerted on the sensor cable.
  • this element pivots around the axial rod 3.
  • the elements 2 of the device being independent of one another, the position of the other elements, in particular adjacent elements, is not modified by this force.
  • the wall 21 of the element 2 considered shifts relative to the wall 22 of the element placed above.
  • the wall 22 of this element shifts relative to the wall 21 of the element placed below.
  • the openings 25 and 26 of this element are no longer aligned with those of the other elements of the device.
  • the sensor cable 6 is then compressed in two places at its openings 25 and 26. The movement of the element 2 is then detected.
  • This detection device is not very sensitive to ground movements because it detects the relative displacement of each element 2 relative to adjacent elements.
  • each element undergoes a displacement which is slightly greater than that of the element placed immediately below and slightly lower than that of the element placed immediately above.
  • the openings 25 and 26 of the element in question are therefore slightly offset with respect to those of the adjacent elements. If the openings 25 or 26 are slightly larger than the section of the sensor cable, this small displacement of the elements 2 is not detected by the sensor cable 6.
  • the wedges 260 are used to adjust the sensitivity level of the device. The sensitivity of the detection will be greater or less depending on the thickness of the shims. It is also possible to change the sensitivity of the detection according to the vertical position of the element. For example, shims having a first thickness up to a height of 1.40 meters and shims having a second thickness beyond 1.40 meters can be used.
  • This device is very simple to install on the PI post.
  • the axial rod 3 is inserted into the openings 23 and 24 of the elements 2 to be mounted on each other and in the opening of the fasteners 4, the assembly then being fixed to the post PI by the fasteners 4.
  • elements 2 are then locked in rotation relative to one another by screws V visible on the Figures 7 and 8 in such a way that the openings 25 and 26 of the set of elements 2 are aligned with the Y axis.
  • the sensor cable 6 is then introduced into the openings 25 and 26 thus aligned and the screws V are removed.
  • the wires F are fixed to the elements 2 by the assembly means 27.
  • the wedges 260 are put in place in the openings 25, 26 to adjust the detection sensitivity of each element.
  • the resistance of the detector cable 6 varies according to the intensity of the pressure.
  • the intensity of the pressure on the cable is low (low displacement of the element 2)
  • the resistance of the cable is high, of the order of 200 ohms in the case of the Mayser cable referenced above, and when the intensity the pressure on the cable is high (strong displacement due to the element 2), the resistance of the cable is weak, less than 100 ohms. It is therefore possible to provide different actions depending on the value of the resistance of the measured cable. If the resistance is between 100 and 200 ohms, no alarm signal is transmitted. For example, it is sufficient to trigger a projector and / or a video camera disposed near the fence. If the resistance is less than 100 ohms, an alarm signal is transmitted to a monitoring center.
  • a sensor cable cooperates with openings in the elements of the device to detect the relative movement of an element relative to the other elements.
  • the sensor cable 6 is replaced by a switch 6 'disposed in the lower part of the element 2', on the branch 221 'of the support piece. Platelets 212 and 222 are removed.
  • This switch comprises an elastic arm 61 ' movable between a rest position (or extended position) and a retracted position.
  • the elastic arm passes through the branch 221 'of the element 2' via an opening. Its distal end is equipped with a sphere 62 '.
  • the elastic arm 61 ' is in the rest position, the sphere 62' is present in a housing 214 'formed in the branch 211' of the element placed below.
  • the detection device is mounted on an intermediate pole PI and each element 2 is rotatable about an axis X.
  • the elements 2 "of the detection device 1" are coupled together by coupling means 29 so as to be pivotable and / or horizontally slide relative to each other along a substantially horizontal axis. With this embodiment, it is no longer necessary to mount the detection device on an intermediate pole.
  • the elements 2 each comprise a vertical wall to which is attached a wire F and upper and lower horizontal walls extending from the ends of the vertical wall.
  • a U-shaped part whose base 200 "forms the vertical wall and the branches 211" and 221 “form the upper and lower horizontal walls, openings 25" and 26 “(not shown in the figures) are formed in the horizontal walls superior and
  • the shims 260 are advantageously introduced on either side of the detector cable into the openings 26" and 25 "in order to prevent the scissors effect on the cable.
  • the first part of the coupling means consists for example of a substantially horizontal rod 291, of circular section, extending along the Z axis and fixed to the vertical wall of the first element as illustrated in FIGS. Figures 13 to 15 .
  • the second part of the coupling means consist of lugs 292 extending on either side of the vertical wall of the second element, said lugs being provided with bores intended to receive the rod 291 so that the second element can slide and / or rotate around this rod.
  • This third embodiment has the main advantage of not requiring an intermediate pole for mounting on the fence.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Burglar Alarm Systems (AREA)

Description

La présente invention concerne une clôture ou section de clôture constituée d'une nappe de fils tendus entre des poteaux, et se rapporte plus particulièrement à un dispositif de détection d'intrusion intégré à une telle clôture pour détecter les intrusions ou tentatives d'intrusion dans la zone protégée par ladite clôture.The present invention relates to a fence or fence section consisting of a sheet of son stretched between posts, and relates more particularly to an intrusion detection device integrated in such a fence to detect intrusions or attempts to intrude into a fence. the area protected by the fence.

La détection d'intrusion est généralement basée sur la détection du déplacement de fils de la nappe, ce déplacement de fil s'opérant lorsqu'un individu tente de passer à travers la clôture en écartant le fil de sa position normale ou en le sectionnant.Intrusion detection is generally based on the detection of the movement of threads of the web, this movement of thread taking place when an individual tries to pass through the fence by removing the wire from its normal position or by cutting it.

Dans les installations actuelles, les fils de la nappe sont tendus entre deux poteaux d'extrémité et les moyens de détection du déplacement des fils de la nappe sont montés sur un poteau intermédiaire disposé généralement à équidistance des poteaux d'extrémité. Un détecteur indépendant est associé à chaque fil pour détecter le déplacement de ce dernier. Une telle installation est par exemple décrite dans le document WO 02/065418 . Dans ce document, le poteau intermédiaire porte des têtes de support montées oscillantes indépendamment les unes des autres et sur chacune desquelles est fixé un fil de la nappe avec équilibrage des tensions de chaque côté. Pour détecter le déplacement des fils, une portion d'enveloppe souple d'une enceinte remplie d'un fluide est associée à chacune desdites têtes de support d'une manière telle que les oscillations de ladite tête de support provoquent une déformation de la portion d'enveloppe souple qui engendre alors une différence de pression dans le fluide. Un capteur de pression associé à l'enceinte est ensuite chargé de générer un signal représentatif de cette différence de pression.In current installations, the son of the sheet are stretched between two end posts and the means for detecting the movement of the son of the sheet are mounted on an intermediate post disposed generally equidistant from the end posts. An independent detector is associated with each wire to detect the movement of the latter. Such an installation is for example described in the document WO 02/065418 . In this document, the intermediate post carries support heads mounted oscillating independently of each other and each of which is fixed a thread of the web with tension equalization on each side. To detect the displacement of the wires, a portion of flexible envelope of a chamber filled with a fluid is associated with each of said support heads in such a way that the oscillations of said support head cause deformation of the portion of the flexible envelope which then generates a pressure difference in the fluid. A pressure sensor associated with the chamber is then responsible for generating a signal representative of this pressure difference.

Dans cette installation, les moyens de détection sont constitués par les têtes de support montées oscillantes, l'enceinte à enveloppe souple et le capteur de pression. Lorsqu'un fil est écarté de sa position normale ou sectionné, l'équilibre de tension de chaque côté de la tête de support correspondante est rompu. La tête de support pivote autour de son axe et ce pivotement est détecté, via le changement de pression dans l'enceinte remplie de fluide, par le capteur de pression. Chaque tête de support fonctionne comme un détecteur indépendant.In this installation, the detection means consist of the oscillating mounted support heads, the flexible envelope enclosure and the pressure sensor. When a wire is moved away from its normal or sectioned position, the voltage balance on each side of the corresponding support head is broken. The support head pivots about its axis and this pivoting is detected, via the pressure change in the chamber filled with fluid, by the pressure sensor. Each support head functions as an independent detector.

L'un des principaux inconvénients de ce type d'installation est qu'il est très sensible aux mouvements de terrain. En effet, les têtes de support étant montées sur un poteau intermédiaire, tout mouvement affectant la position de ce poteau est susceptible d'entrainer une rupture de l'équilibre des tensions au niveau des têtes de support, plus particulièrement au niveau des têtes de support montées dans la portion supérieure du poteau, et de déclencher une fausse alarme. En effet, lorsque le poteau s'incline de quelques dixièmes de degrés, le déplacement de son extrémité supérieure est non négligeable et peut atteindre plusieurs millimètres. Par exemple, lorsqu'un poteau d'une hauteur de 2 mètres s'incline d'un angle de 0,28 degrés par rapport à la verticale sous l'effet d'un mouvement de terrain, son extrémité supérieure se décale d'environ 1 centimètre par rapport à sa position normale. Cela signifie que, sous l'effet d'une telle inclinaison du poteau, les têtes de support de la portion supérieure du poteau s'écartent d'environ 1 centimètre de leur position normale, ce qui engendre, lorsque l'inclinaison du poteau n'est pas dans un plan orthogonal aux fils, une rupture d'équilibre des tensions au niveau de ces têtes de support.One of the main drawbacks of this type of installation is that it is very sensitive to ground movements. Indeed, the support heads being mounted on an intermediate post, any movement affecting the position of the post is likely to cause a break in the balance of the tensions at the support heads, particularly at the level of the support heads mounted in the upper portion of the pole, and trigger a false alarm. Indeed, when the post tilts a few tenths of degrees, the movement of its upper end is significant and can reach several millimeters. For example, when a 2 meter high pole tilts at an angle of 0.28 degrees from the vertical due to terrain movement, its top end shifts approximately 1 centimeter from its normal position. This means that, under the effect of such inclination of the post, the support heads of the upper portion of the post deviate about 1 centimeter from their normal position, which generates, when the inclination of the post It is not in a plane orthogonal to the wires, a break of equilibrium of the tensions at the level of these support heads.

Ce type d'installation est également très sensible à la température extérieure qui peut entrainer une dilatation et/ou une contraction des fils et des poteaux et, de la même façon que précédemment, écarter les têtes de support de leur position normale.This type of installation is also very sensitive to the outside temperature which can lead to dilation and / or contraction of the wires and poles and, in the same manner as before, move the support heads away from their normal position.

Pour réduire le taux de fausses alarmes, la solution actuelle consiste à augmenter la stabilité des poteaux en leur rajoutant des jambes de force et/ou en sur-dimensionnant les plots de béton dans lesquels ils sont scellés. Cette solution est toutefois inefficace par rapport à la dilatation et la compression des fils et/ou des poteaux et est de plus très coûteuse à mettre en oeuvre.To reduce the rate of false alarms, the current solution is to increase the stability of the posts by adding struts and / or over-dimensioning the concrete pads in which they are sealed. This solution is however ineffective compared to the expansion and compression of the son and / or poles and is also very expensive to implement.

US 4,683,356 divulgue un dispositif de détection d'intrusion pour une nappe de fils de clôture constituée de deux poteaux d'extrémité entre lesquels sont tendus les fils sensiblement horizontalement, comportant des moyens de détection aptes a détecter le déplacement d'au moins un fil par rapport aux autres fils, lesdits moyens de détection comportant un premier élément et un second élément montés l'un au-dessus de l'autre et a chacun desquels est fixé un fil correspondant, lesdits premier et deuxième éléments étant aptes a se déplacer en translation et en rotation l'un par rapport a l'autre, et un organe de détection pour détecter le déplacement du premier élément par rapport au deuxième élément. Le premier et le second éléments sont cependant sensiblement différents l'un de l'autre. US 4,683,356 discloses an intrusion detection device for a fence wire web consisting of two end posts between which the wires are stretched substantially horizontally, having detection means adapted to detect the movement of at least one wire with respect to other wires, said detection means comprising a first element and a second element mounted one above the other and each of which is fixed a corresponding wire, said first and second elements being able to move in translation and in rotation relative to each other, and a detecting member for detecting movement of the first member relative to the second member. The first and the second elements are, however, substantially different from each other.

Un but de l'invention est de proposer un dispositif de détection qui est robuste face aux mouvements de terrain et aux changements de température, simple et peu coûteux à mettre en oeuvre.An object of the invention is to provide a detection device which is robust to field movements and temperature changes, simple and inexpensive to implement.

A cet effet, la présente invention propose un dispositif de détection d'intrusion pour une nappe de fils de clôture constituée de deux poteaux d'extrémité entre lesquels sont tendus les fils sensiblement horizontalement, caractérisé en ce qu'il comporte des moyens de détection aptes à détecter le déplacement d'au moins un fil par rapport aux autres fils, lesdits moyens de détection comportant:

  • au moins des premier et deuxième éléments sensiblement identiques montés l'un au-dessus de l'autre et à chacun desquels est fixé un fil correspondant, lesdits premier et deuxième éléments étant aptes à se déplacer en translation et/ou en rotation l'un par rapport à l'autre, et
  • un organe de détection pour détecter le déplacement du premier élément par rapport au deuxième élément sous l'effet d'une force externe appliquée sur le fil fixé au premier élément.
For this purpose, the present invention proposes an intrusion detection device for a sheet of fence wires consisting of two end posts between which the wires are stretched substantially horizontally, characterized in that it comprises suitable detection means. detecting movement of at least one wire relative to the other wires, said detecting means comprising:
  • at least first and second substantially identical elements mounted one above the other and each of which is fixed a corresponding wire, said first and second elements being able to move in translation and / or in rotation one of compared to each other, and
  • a detecting member for detecting movement of the first member relative to the second member under the effect of an external force applied to the wire attached to the first member.

Ainsi, selon l'invention, toute force de traction exercée sur l'un des fils en un point de celui-ci, situé entre les poteaux d'extrémité, entraîne un déplacement en translation et/ou en rotation de l'élément correspondant par rapport à un élément placé en dessous et/ou un élément placé au dessus, lequel déplacement est détecté par l'organe de détection.Thus, according to the invention, any tensile force exerted on one of the wires at a point thereof, located between the end posts, causes a displacement in translation and / or in rotation of the corresponding element with respect to an element placed below and / or a member placed above, which displacement is detected by the detection member.

Selon un mode de réalisation, lesdits premier et deuxième éléments sont sensiblement en contact l'un avec l'autre.According to one embodiment, said first and second elements are substantially in contact with each other.

Selon un mode de réalisation, chacun desdits premier et deuxième éléments est libre en rotation autour d'un axe de rotation sensiblement vertical. Lesdits premier et deuxième éléments sont par exemple mobiles en rotation autour d'une tige axiale sensiblement verticale s'étendant le long dudit axe de rotation, laquelle tige axiale est assemblée à un poteau intermédiaire placé entre lesdits poteaux d'extrémité.According to one embodiment, each of said first and second elements is free to rotate about a substantially vertical axis of rotation. Said first and second elements are for example rotatable about a substantially vertical axial rod extending along said axis of rotation, which axial rod is assembled to an intermediate pole placed between said end posts.

Dans ce mode de réalisation, chacun desdits premier et deuxième éléments présente avantageusement une configuration en U couché ou en I. Chacun desdits premier et deuxième éléments présente alors une paroi verticale à laquelle est fixé un fil correspondant et des parois horizontales supérieure et inférieure s'étendant à partir des extrémités de la paroi verticale, lesdites parois horizontales supérieure et inférieure étant munies de premières ouvertures disposées le long dudit axe de rotation pour le passage de la tige axiale.In this embodiment, each of said first and second elements advantageously has a recessed or I-shaped configuration. Each of said first and second elements then has a vertical wall to which is attached a corresponding wire and upper and lower horizontal walls. extending from the ends of the vertical wall, said upper and lower horizontal walls being provided with first openings disposed along said axis of rotation for the passage of the axial rod.

Selon un autre mode de réalisation, les premier et deuxième éléments sont couplés entre eux par des moyens de couplage de manière à pouvoir pivoter et/ou coulisser l'un par rapport à l'autre selon un axe sensiblement horizontal. Dans ce mode de réalisation, les premier et deuxième éléments présentent également une configuration en U couché ou en I, à savoir qu'ils comportent chacun une paroi verticale à laquelle est fixé un fil correspondant et des parois horizontales supérieure et inférieure s'étendant à partir des extrémités de la paroi verticale, lesdits moyens de couplage étant assemblés aux parois desdits premier et deuxième éléments.According to another embodiment, the first and second elements are coupled together by coupling means so as to be pivotable and / or slide relative to each other along a substantially horizontal axis. In this embodiment, the first and second elements also have a recessed or I-shaped configuration, namely each having a vertical wall to which a corresponding wire is attached and upper and lower horizontal walls extending to from the ends of the vertical wall, said means of coupling being assembled to the walls of said first and second elements.

Dans ces modes de réalisation, l'organe de détection comprend avantageusement un câble détecteur, sensible à la pression, traversant les parois horizontales supérieure et inférieure des premier et deuxième éléments via des deuxièmes ouvertures disposées selon un deuxième axe sensiblement parallèle à l'axe de rotation, les dimensions des deuxièmes ouvertures étant sensiblement égales aux dimensions de la section transversale du câble détecteur.In these embodiments, the detection member advantageously comprises a sensor cable, sensitive to pressure, passing through the upper and lower horizontal walls of the first and second elements via second openings arranged along a second axis substantially parallel to the axis of rotation, the dimensions of the second openings being substantially equal to the dimensions of the cross section of the detector cable.

Ainsi, lorsqu'un élément se déplace sous l'effet d'une force externe appliquée sur le fil correspondant, les deuxièmes ouvertures des parois horizontales supérieure et inférieure de l'élément ne sont plus alignées avec les deuxièmes ouvertures des autres éléments, notamment avec celles des éléments adjacents placés au-dessus et en dessous de l'élément considéré. Le câble détecteur subit alors une pression ou compression au niveau de ses deuxièmes ouvertures. Cette compression du câble indique que l'élément s'est déplacé et déclenche l'envoi d'un signal d'alarme.Thus, when an element moves under the effect of an external force applied to the corresponding wire, the second openings of the upper and lower horizontal walls of the element are no longer aligned with the second openings of the other elements, especially with those of adjacent elements placed above and below the element under consideration. The sensor cable then undergoes pressure or compression at its second openings. This compression of the cable indicates that the element has moved and triggers the sending of an alarm signal.

Avantageusement, le dispositif comprend en outre au moins une cale apte à être introduite dans une deuxième ouverture des parois horizontales inférieure et supérieure des premier et deuxième éléments. Avantageusement, deux cales sont disposées dans la deuxième ouverture de part et d'autre du câble détecteur suivant la direction de déplacement de l'élément. Ces cales peuvent servir à adapter la taille de la deuxième ouverture et régler l'intensité de la compression pour un déplacement donné de l'élément.Advantageously, the device further comprises at least one shim capable of being introduced into a second opening of the lower and upper horizontal walls of the first and second elements. Advantageously, two shims are arranged in the second opening on either side of the sensor cable in the direction of movement of the element. These wedges can be used to adjust the size of the second opening and to adjust the intensity of the compression for a given displacement of the element.

Avantageusement, chaque cale présente une hauteur supérieure à l'épaisseur de la paroi horizontale inférieure ou supérieure. De préférence, la cale présente une hauteur deux fois supérieure à l'épaisseur de la paroi horizontale inférieure ou supérieure. Lesdits premier et deuxième éléments sensiblement en contact, lorsque le premier élément est placé au dessus du deuxième élément, la cale introduite dans la deuxième ouverture de la paroi horizontale inférieure du premier élément débouche dans la deuxième ouverture de la paroi horizontale supérieure du deuxième élément.Advantageously, each shim has a height greater than the thickness of the lower or upper horizontal wall. Preferably, the shim has a height twice the thickness of the lower or upper horizontal wall. Said first and second elements substantially in contact, when the first element is placed above the second element, the shim introduced into the second opening of the lower horizontal wall of the first element opens into the second opening of the upper horizontal wall of the second element.

Ces cales permettent alors d'empêcher l'effet ciseau sur le câble détecteur lorsque le premier élément se déplace par rapport au deuxième élément.These shims then make it possible to prevent the chisel effect on the detector cable when the first element moves relative to the second element.

Par ailleurs, chacun desdits premier et deuxième éléments est équipé d'un moyen d'assemblage pour fixer le fil correspondant à la paroi verticale de l'élément. Avantageusement, la position du moyen d'assemblage sur la paroi verticale est réglable verticalement.Furthermore, each of said first and second elements is equipped with an assembly means for fixing the wire corresponding to the vertical wall of the element. Advantageously, the position of the assembly means on the vertical wall is vertically adjustable.

Enfin, l'invention concerne également une clôture comprenant une ou plusieurs nappes de fils en succession remarquable en ce qu'elle est équipée d'un dispositif de détection d'intrusion tel que défini ci-dessus.Finally, the invention also relates to a fence comprising one or more son plies in succession remarkable in that it is equipped with an intrusion detection device as defined above.

Les caractéristiques et avantages de l'invention mentionnés ci-dessus, ainsi que d'autres, apparaitront plus clairement dans la description suivante et les dessins joints, dans lesquels:

  • la figure 1 est une vue schématique de face d'une nappe de fils tendus sur laquelle est disposé un premier mode de réalisation du dispositif de détection de l'invention;
  • la figure 2 est une vue agrandie du détail D1 de la figure 1;
  • la figure 3 est une vue en coupe selon le plan de coupe III-III de la figure 1;
  • la figure 4 est une vue agrandie du détail D2 de la figure 3;
  • la figure 5 est une vue analogue à la figure 4 dans lequel un capot de protection du câble détecteur a été retiré;
  • la figure 6 est une première vue en perspective d'un élément du dispositif présenté aux figures 1 à 5, ledit élément étant traversé par un câble détecteur et le capot de protection du câble détecteur ayant été retiré;
  • la figure 7 est une autre vue en perspective de l'élément représenté à la figure 6;
  • la figure 8 est une vue de face de l'élément de détection représenté aux figures 6 et 7;
  • la figure 9 est une vue de côté de l'élément de détection représenté aux figures 6 et 7;
  • la figure 10 est une vue analogue à la figure 6 mais dans laquelle le capot de protection du câble détecteur est en place;
  • les figures 11 et 12 sont des vues schématiques illustrant le fonctionnement d'un deuxième mode de réalisation du dispositif de détection de l'invention, et
  • la figure 13 est une vue schématique de face d'un troisième dispositif de détection conforme à l'invention,
  • la figure 14 est une vue en coupe selon le plan de coupe XIV-XIV de la figure 13; et
  • la figure 15 est une vue en coupe selon le plan de coupe XV-XV de la figure 13.
The features and advantages of the invention mentioned above, as well as others, will appear more clearly in the following description and the accompanying drawings, in which:
  • the figure 1 is a schematic front view of a sheet of stretched son on which is disposed a first embodiment of the detection device of the invention;
  • the figure 2 is an enlarged view of detail D1 of the figure 1 ;
  • the figure 3 is a sectional view along the section plane III-III of the figure 1 ;
  • the figure 4 is an enlarged view of detail D2 of the figure 3 ;
  • the figure 5 is a view similar to the figure 4 wherein a protective cover of the sensor cable has been removed;
  • the figure 6 is a first perspective view of an element of the device presented to Figures 1 to 5 said element being traversed by a sensor cable and the protective cover of the detector cable having been removed;
  • the figure 7 is another perspective view of the element shown in figure 6 ;
  • the figure 8 is a front view of the sensing element shown in Figures 6 and 7 ;
  • the figure 9 is a side view of the sensing element shown in Figures 6 and 7 ;
  • the figure 10 is a view similar to the figure 6 but in which the protective cover of the sensor cable is in place;
  • the Figures 11 and 12 are schematic views illustrating the operation of a second embodiment of the detection device of the invention, and
  • the figure 13 is a diagrammatic front view of a third detection device according to the invention,
  • the figure 14 is a sectional view along section plane XIV-XIV of the figure 13 ; and
  • the figure 15 is a sectional view along the sectional plane XV-XV of the figure 13 .

L'invention est décrite ci-après à travers trois modes de réalisation du dispositif de détection conforme à l'invention comportant chacun des éléments identiques ou sensiblement identiques montés les uns sur les autres, aptes à se déplacer en translation et/ou en rotation les uns par rapport aux autres et auxquels sont fixés rigidement les fils de clôture, et un organe de détection apte à détecter le déplacement d'un élément par rapport à l'élément placé immédiatement au dessus et/ou immédiatement en dessous lorsqu'une force externe est appliquée sur le fil fixé à cet élément.The invention is described below through three embodiments of the detection device according to the invention each comprising identical or substantially identical elements mounted on one another, able to move in translation and / or in rotation. relative to each other and to which the fence wires are rigidly attached, and a detection member adapted to detect the displacement of an element by relative to the element immediately above and / or immediately below when an external force is applied to the wire attached to this element.

Un premier mode de réalisation est illustré par les figures 1 à 10.A first embodiment is illustrated by the Figures 1 to 10 .

La figure 1 représente une nappe de fils tendus destinée à constituer une section de clôture dont la longueur est en pratique de l'ordre de 50 mètres. Cette section de clôture est disposée le long du périmètre d'une zone à protéger. Elle comporte deux poteaux d'extrémité PE entre lesquels sont tendus horizontalement des fils F à intervalles réguliers. A équidistance des poteaux d'extrémité PE est disposé un poteau détecteur intermédiaire PI sur lequel est monté le dispositif de détection 1 de l'invention. Les poteaux sont scellés dans des plots de béton P coulés dans le sol. Chaque poteau est avantageusement surmonté d'une portion supplémentaire inclinée, appelée classiquement bavolet B, s'étendant vers l'extérieur de la zone à protéger comme montré plus particulièrement à la figure 3. Des fils F sont également tendus entre les bavolets des poteaux d'extrémité PE.The figure 1 is a sheet of stretched son intended to form a fence section whose length is in practice of the order of 50 meters. This fence section is disposed along the perimeter of an area to be protected. It has two end posts PE between which are spread horizontally F son at regular intervals. Equidistant from the end posts PE is an intermediate detector post PI on which the detection device 1 of the invention is mounted. The posts are sealed in concrete pads P cast in the ground. Each post is advantageously surmounted by an additional inclined portion, conventionally referred to as B-bonnet, extending outwardly of the zone to be protected, as shown more particularly in FIG. figure 3 . F wires are also stretched between the flaps of the PE end posts.

Dans ce mode de réalisation, le poteau détecteur intermédiaire PI est équipé d'un dispositif de détection 1 apte à détecter tout déplacement,d'au moins un fil par rapport à un autre fil.In this embodiment, the intermediate sensor post PI is equipped with a detection device 1 able to detect any displacement of at least one wire relative to another wire.

En référence aux figures 1 à 5, le dispositif de détection 1 comprend une pluralité d'éléments 2, identiques ou sensiblement identiques, mobiles en rotation autour d'une tige axiale 3 s'étendant selon un axe sensiblement vertical X, lesdits éléments étant montés les uns au-dessus les autres et chaque élément étant sensiblement en contact avec l'élément placé immédiatement au-dessus et/ou l'élément placé immédiatement en dessous. La tige axiale 3, de section circulaire, est fixée par des moyens de fixation appropriés au poteau intermédiaire PI. Les moyens de fixation 4 sont par exemple constitués par une pièce 4 de configuration en U dont la base est munie d'une ouverture pour le passage de la tige axiale 3 et dont les branches sont vissées au poteau PI comme montré plus en détail à la figure 4. Les éléments 2 sont mobiles en rotation autour de l'axe de rotation X indépendamment les uns des autres.With reference to Figures 1 to 5 , the detection device 1 comprises a plurality of elements 2, identical or substantially identical, rotatable about an axial rod 3 extending along a substantially vertical axis X, said elements being mounted one above the other and each element being substantially in contact with the element immediately above and / or the element immediately below. The axial rod 3, of circular section, is fixed by suitable fixing means to the intermediate pole PI. The means of fixing 4 are for example constituted by a U-shaped part 4 whose base is provided with an opening for the passage of the axial rod 3 and whose branches are screwed to the P1 post as shown in more detail in FIG. figure 4 . The elements 2 are rotatable about the axis of rotation X independently of each other.

Un fil F est fixé à chaque élément 2 par des moyens d'assemblage 27 qui seront décrits plus loin. Toute force exercée sur le fil F entraine alors une rotation de l'élément 2 correspondant autour de l'axe X. Ce mouvement de rotation est détecté par un organe de détection se présentant sous la forme d'un câble détecteur 6, visible sur la figure 5, sensible à la pression. Ce câble est par exemple un câble comprenant du carbone et deux fils de cuivre et une gaine en polyéthylène haute densité, tel que le câble Mayser EKS002_commercialisé par la société Mayser. La résistance de ce câble varie en fonction de l'intensité de la pression qui lui est appliqué. Ce câble est passé à travers les éléments 2 du dispositif de sorte que, lorsque l'un des éléments 2 est entrainé en rotation autour de l'axe X sous l'effet d'une force appliquée sur le fil F correspondant, le câble détecteur 6 est comprimé au niveau de zone de contact avec les autres éléments et déclenche l'envoi d'un signal d'alarme. Ce câble 6 est protégé des animaux par un capot de protection 28 monté sur chacun des éléments 2 et visible sur les figures 2 à 4 et la figure 10. Par ailleurs, des pattes 7 sont prévues sur le dispositif pour porter un capot extérieur (non représenté) s'étendant tout le long du poteau PI et pour rendre invisible le dispositif de détection.A wire F is fixed to each element 2 by assembly means 27 which will be described later. Any force exerted on the wire F then causes a rotation of the corresponding element 2 around the axis X. This rotational movement is detected by a detection member in the form of a sensor cable 6, visible on the figure 5 , sensitive to pressure. This cable is for example a cable comprising carbon and two copper wires and a high density polyethylene sheath, such as the Mayser cable EKS002_commercialized by the company Mayser. The resistance of this cable varies according to the intensity of the pressure applied to it. This cable is passed through the elements 2 of the device so that, when one of the elements 2 is rotated about the X axis under the effect of a force applied to the corresponding wire F, the sensor cable 6 is compressed at the contact area with the other elements and triggers the sending of an alarm signal. This cable 6 is protected from the animals by a protective cover 28 mounted on each of the elements 2 and visible on the Figures 2 to 4 and the figure 10 . Furthermore, tabs 7 are provided on the device for carrying an outer cover (not shown) extending along the pole PI and to make invisible the detection device.

L'agencement du câble détecteur 6 avec les éléments 2 est plus particulièrement montré aux figures 5 à 9. La figure 5 est une vue agrandie du détail D2 de la figure 3, dans laquelle les capots de protection 28 montés sur chacun des éléments 2 ont été retirés. Les figures 6 à 9 représentent différentes vues d'un élément 2 traversé par le câble détecteur 6.The arrangement of the sensor cable 6 with the elements 2 is more particularly shown to Figures 5 to 9 . The figure 5 is an enlarged view of detail D2 of the figure 3 , in which the protective covers 28 mounted on each of the elements 2 have been removed. The Figures 6 to 9 represent different views of an element 2 traversed by the detector cable 6.

L'élément 2 comprend une paroi verticale 20 et deux parois horizontales 21, 22 parallèles s'étendant à partir des extrémités de la paroi verticale de manière à former une pièce de configuration en U couché ou en I. Des ouvertures 23 et 24 circulaires, disposées sur l'axe X, sont ménagées dans les parois horizontales 21, 22 pour le passage de la tige axiale 3. D'autres ouvertures, 25 et 26, disposées selon un axe Y parallèle à l'axe X, sont réalisées dans les parois horizontales 21, 22 pour le passage du câble détecteur 6. La taille des ouvertures 25 et 26 est sensiblement égale ou légèrement supérieure à la taille de la section du câble détecteur 6. Comme décrit plus loin, la taille des ouvertures 25 et 26 pourra être adaptée au moyen de cales.Element 2 comprises a vertical wall 20 and two parallel horizontal walls 21, 22 extending from the ends of the vertical wall so as to form a recessed U-shaped or I-shaped part. Circular openings 23 and 24, arranged on the axis X, are formed in the horizontal walls 21, 22 for the passage of the axial rod 3. Other openings, 25 and 26, arranged along an axis Y parallel to the axis X, are formed in the horizontal walls 21, 22 for the passage of the sensor cable 6. The size of the openings 25 and 26 is substantially equal to or slightly greater than the size of the section of the sensor cable 6. As described below, the size of the openings 25 and 26 may be adapted by means of shims.

Le fil F est fixé rigidement sur la paroi verticale par un moyen d'assemblage 27. Ce moyen d'assemblage comprend une plaque 271 munie dans sa partie inférieure d'une patte 272 s'étendant perpendiculairement à la plaque 271 et destinée à venir en butée contre la paroi verticale 20 ou à être introduite dans une lumière 201 de la paroi verticale 20. La plaque 271 est assemblée à la paroi verticale par une vis 273 et un écrou 274, une lumière 201 étant ménagée dans la paroi verticale pour le passage de la vis 273. La lumière 201 est de préférence oblongue pour permettre un réglage de la position verticale du moyen d'assemblage. La largeur de la patte 272 est prise légèrement inférieure à la largeur de la lumière 201 pour que l'extrémité distale de la patte 272 puisse être introduite dans la lumière 201. Lorsque le fil F est assemblé à l'élément 2, sa section est immobilisée dans l'espace situé entre la paroi verticale, la plaque 271, la patte 272 et la vis 273 comme montré à la figure 9.The wire F is fixed rigidly on the vertical wall by an assembly means 27. This assembly means comprises a plate 271 provided in its lower part with a tab 272 extending perpendicular to the plate 271 and intended to come into abutment against the vertical wall 20 or to be introduced into a slot 201 of the vertical wall 20. The plate 271 is connected to the vertical wall by a screw 273 and a nut 274, a slot 201 being formed in the vertical wall for the passage The light 201 is preferably oblong to allow adjustment of the vertical position of the assembly means. The width of the tab 272 is taken slightly less than the width of the light 201 so that the distal end of the tab 272 can be introduced into the light 201. When the wire F is assembled to the element 2, its section is immobilized in the space between the vertical wall, the plate 271, the tab 272 and the screw 273 as shown in FIG. figure 9 .

L'élément 2 est de préférence une pièce monobloc, obtenue par exemple par moulage d'un matériau plastique. L'élément 2 peut également être réalisé en métal par pliage et perçage d'une plaque. Dans ce second cas, il peut être difficile d'obtenir un alignement précis des ouvertures 23 et 24 et/ou des ouvertures 25 et 26 sauf à disposer d'équipements de pointe très couteux. Aussi, dans le mode de réalisation présenté ici, l'élément 2 est réalisé à partir de plusieurs pièces, une pièce support en U réalisé par pliage et deux plaquettes 212 et 222.The element 2 is preferably a one-piece piece, obtained for example by molding a plastic material. The element 2 can also be made of metal by folding and drilling a plate. In this second case, it may be difficult to obtain a precise alignment of the openings 23 and 24 and / or the openings 25 and 26 except to have very expensive advanced equipment. Also, in the embodiment presented here, the element 2 is made from several pieces, a U-shaped support piece made by folding and two plates 212 and 222.

La pièce support en U comprend une base 200 verticale et deux branches 211 et 221 parallèles s'étendant à partir des extrémités de la base 200 perpendiculairement à celle-ci. Les plaquettes 212 et 222, de forme rectangulaire et de faible épaisseur, sont fixées sur la face externe des branches 211 et 221 par des vis 213 et 223. La paroi horizontale 21 de l'élément 2 est alors constituée par la branche 211 et la plaquette 212, la paroi horizontale 22 est formée par la branche 221 et la plaquette 222 et la base 200 de la pièce support constitue la paroi verticale 20. Les ouvertures 23 et 24 sont réalisées dans les branches 211 et 221 de la pièce support et les ouvertures 25 et 26 sont réalisées dans les plaquettes 212 et 222.The U-shaped support piece comprises a vertical base 200 and two parallel branches 211 and 221 extending from the ends of the base 200 perpendicular to it. The wafers 212 and 222, of rectangular shape and of small thickness, are fixed on the external face of the branches 211 and 221 by screws 213 and 223. The horizontal wall 21 of the element 2 is then constituted by the branch 211 and the plate 212, the horizontal wall 22 is formed by the branch 221 and the plate 222 and the base 200 of the support part constitutes the vertical wall 20. The openings 23 and 24 are formed in the branches 211 and 221 of the support part and the apertures 25 and 26 are made in platelets 212 and 222.

La paroi verticale 20 est avantageusement équipée d'une cornière 202 s'étendant vers l'intérieur du U le long d'un bord longitudinal de la paroi verticale et perpendiculairement à celle-ci. En coopération avec le capot de protection 28 (visible sur la figure 10), elle permet d'entourer le câble détecteur 6 pour le protéger de la pollution extérieure et/ou de la poussière et/ou empêcher que des corps étrangers, par exemple des animaux ou des branchages, ne viennent au contact du câble et déclenchent des fausses alarmes. En référence à la figure 10, le capot de protection 28 comprend un corps 280 en U et deux pattes 281 munies de vis 282 pour fixer le capot 28 à la paroi verticale 20.The vertical wall 20 is advantageously equipped with a bracket 202 extending inwardly of the U along a longitudinal edge of the vertical wall and perpendicular thereto. In cooperation with the protective cover 28 (visible on the figure 10 ), it allows to surround the detector cable 6 to protect it from external pollution and / or dust and / or to prevent foreign bodies, for example animals or branches, from coming into contact with the cable and triggering false alarms. With reference to the figure 10 the protective cover 28 comprises a U-shaped body 280 and two legs 281 provided with screws 282 for fixing the cover 28 to the vertical wall 20.

Si on se réfère de nouveau aux figures 6 à 9, des cales rigides 260, de forme générale en T, sont avantageusement introduites dans l'ouverture 26 de l'élément 2, de part et d'autre du câble détecteur 6, suivant la direction de déplacement de l'élément autour de l'axe de rotation, la barre du T reposant par son bord inférieur sur la face supérieure de la plaquette 222 et la jambe du T étant introduite dans l'ouverture 26. La longueur de la jambe du T est supérieure à l'épaisseur de la plaquette 222 pour que ladite jambe débouche dans l'ouverture 25 de l'élément disposé immédiatement en dessous. La longueur de la jambe est de préférence au moins égale à l'épaisseur totale des plaquettes 212 et 222. Ces cales ont pour fonction d'empêcher l'effet ciseau qui s'opère sur le câble détecteur d'un élément au niveau des ouvertures 25 et 26 lorsque cet élément se déplace par rapport aux autres. Elles servent également à régler la sensibilité de la détection par le câble détecteur.If we refer again to Figures 6 to 9 , rigid shims 260, generally T-shaped, are advantageously introduced into the opening 26 of the element 2, on either side of the sensor cable 6, in the direction of movement of the element around the axis of rotation, the bar of the T resting by its lower edge on the upper face of the plate 222 and the leg of the T being inserted into the opening 26. The length of the leg of the T is greater than the thickness of the plate 222 so that said leg opens into the opening 25 of the element disposed immediately below. The length of the leg is preferably at least equal to the total thickness of the plates 212 and 222. These wedges have the function of preventing the chisel effect which takes place on the sensor cable of an element at the openings 25 and 26 when this element moves relative to the others. They are also used to adjust the sensing sensitivity of the sensor cable.

Le dispositif fonctionne de la manière suivante. En l'absence de toute force exercée sur les fils F de la clôture, les ouvertures 25 et 26 de l'ensemble des éléments 2 sont alignées sur l'axe Y. Aucune pression n'est exercée sur le câble détecteur.The device operates as follows. In the absence of any force exerted on the wires F of the fence, the openings 25 and 26 of all the elements 2 are aligned on the Y axis. No pressure is exerted on the sensor cable.

En présence d'une force appliquée sur le fil F fixé à un élément 2 donné, cet élément pivote autour de la tige axiale 3. Les éléments 2 du dispositif étant indépendants les uns par rapport aux autres, la position des autres éléments, notamment des éléments adjacents, n'est pas modifiée par cette force. Il en résulte que la paroi 21 de l'élément 2 considéré se décale par rapport à la paroi 22 de l'élément placé au-dessus. De même, la paroi 22 de cet élément se décale par rapport à la paroi 21 de l'élément placé en dessous. Les ouvertures 25 et 26 de cet élément ne sont plus alignées avec celles des autres éléments du dispositif. Le câble détecteur 6 est alors comprimé en deux endroits au niveau de ses ouvertures 25 et 26. Le mouvement de l'élément 2 est alors détecté.In the presence of a force applied on the wire F fixed to a given element 2, this element pivots around the axial rod 3. The elements 2 of the device being independent of one another, the position of the other elements, in particular adjacent elements, is not modified by this force. As a result, the wall 21 of the element 2 considered shifts relative to the wall 22 of the element placed above. Similarly, the wall 22 of this element shifts relative to the wall 21 of the element placed below. The openings 25 and 26 of this element are no longer aligned with those of the other elements of the device. The sensor cable 6 is then compressed in two places at its openings 25 and 26. The movement of the element 2 is then detected.

Ce dispositif de détection est peu sensible aux mouvements de terrain car on détecte le déplacement relatif de chaque élément 2 par rapport aux éléments adjacents. Ainsi, si le poteau s'incline suite à un mouvement de terrain, chaque élément subit un déplacement qui est légèrement supérieur à celui de l'élément placé immédiatement en dessous et légèrement inférieur à celui de l'élément placé immédiatement au dessus. Les ouvertures 25 et 26 de l'élément considéré sont donc légèrement décalées par rapport à celles des éléments adjacents. Si les ouvertures 25 ou 26 sont légèrement plus grandes que la section du câble détecteur, ce faible déplacement des éléments 2 n'est pas détecté par le câble détecteur 6. Les cales 260 servent à régler le niveau de sensibilité du dispositif. La sensibilité de la détection sera plus ou moins grande selon l'épaisseur des cales. Il est par ailleurs possible de modifier la sensibilité de la détection en fonction de la position verticale de l'élément. On peut par exemple utiliser des cales ayant une première épaisseur jusqu'à une hauteur de clôture de 1,40 mètre et des cales ayant une deuxième épaisseur au-delà de 1,40 mètre.This detection device is not very sensitive to ground movements because it detects the relative displacement of each element 2 relative to adjacent elements. Thus, if the pole tilts following a movement of ground, each element undergoes a displacement which is slightly greater than that of the element placed immediately below and slightly lower than that of the element placed immediately above. The openings 25 and 26 of the element in question are therefore slightly offset with respect to those of the adjacent elements. If the openings 25 or 26 are slightly larger than the section of the sensor cable, this small displacement of the elements 2 is not detected by the sensor cable 6. The wedges 260 are used to adjust the sensitivity level of the device. The sensitivity of the detection will be greater or less depending on the thickness of the shims. It is also possible to change the sensitivity of the detection according to the vertical position of the element. For example, shims having a first thickness up to a height of 1.40 meters and shims having a second thickness beyond 1.40 meters can be used.

Ce dispositif est très simple à installer sur le poteau PI. La tige axiale 3 est insérée dans les ouvertures 23 et 24 des éléments 2 à monter les uns sur les autres et dans l'ouverture des pièces de fixation 4, l'ensemble étant alors fixé au poteau PI par les pièces de fixation 4. Les éléments 2 sont ensuite bloqués en rotation les uns par rapport aux autres par des vis V visibles sur les figures 7 et 8 de manière à ce que les ouvertures 25 et 26 de l'ensemble des éléments 2 soient alignées sur l'axe Y. Le câble détecteur 6 est ensuite introduit dans les ouvertures 25 et 26 ainsi alignées puis les vis V sont retirées. On fixe les fils F aux éléments 2 par les moyens d'assemblage 27. En fin de montage, les cales 260 sont mises en place dans les ouvertures 25, 26 pour régler la sensibilité de détection de chaque élément.This device is very simple to install on the PI post. The axial rod 3 is inserted into the openings 23 and 24 of the elements 2 to be mounted on each other and in the opening of the fasteners 4, the assembly then being fixed to the post PI by the fasteners 4. elements 2 are then locked in rotation relative to one another by screws V visible on the Figures 7 and 8 in such a way that the openings 25 and 26 of the set of elements 2 are aligned with the Y axis. The sensor cable 6 is then introduced into the openings 25 and 26 thus aligned and the screws V are removed. The wires F are fixed to the elements 2 by the assembly means 27. At the end of the assembly, the wedges 260 are put in place in the openings 25, 26 to adjust the detection sensitivity of each element.

Avec ce dispositif, il est possible de prévoir plusieurs paliers dans la détection. Comme indiqué précédemment, la résistance du câble détecteur 6 varie en fonction de l'intensité de la pression. Lorsque l'intensité de la pression sur le câble est faible (faible déplacement de l'élément 2), la résistance du câble est élevée, de l'ordre de 200 ohms dans le cas du câble Mayser référencé précédemment, et lorsque l'intensité de la pression sur le câble est élevée (fort déplacement due l'élément 2), la résistance du câble est faible, inférieur à 100 ohms. On peut donc prévoir des actions différentes selon la valeur de la résistance du câble mesurée. Si la résistance est comprise entre 100 et 200 ohms, on ne transmet pas de signal d'alarme. On se contente par exemple de déclencher un projecteur et/ou une caméra vidéo disposé(e) à proximité de la clôture. Si la résistance est inférieure à 100 ohms, on transmet un signal d'alarme vers un centre de surveillance.With this device, it is possible to provide several levels in the detection. As indicated above, the resistance of the detector cable 6 varies according to the intensity of the pressure. When the intensity of the pressure on the cable is low (low displacement of the element 2), the resistance of the cable is high, of the order of 200 ohms in the case of the Mayser cable referenced above, and when the intensity the pressure on the cable is high (strong displacement due to the element 2), the resistance of the cable is weak, less than 100 ohms. It is therefore possible to provide different actions depending on the value of the resistance of the measured cable. If the resistance is between 100 and 200 ohms, no alarm signal is transmitted. For example, it is sufficient to trigger a projector and / or a video camera disposed near the fence. If the resistance is less than 100 ohms, an alarm signal is transmitted to a monitoring center.

Dans le mode de réalisation décrit en regard des figures 1 à 10, un câble détecteur coopère avec des ouvertures ménagées dans les éléments du dispositif pour détecter le déplacement relatif d'un élément par rapport aux autres éléments.In the embodiment described with reference to Figures 1 to 10 , a sensor cable cooperates with openings in the elements of the device to detect the relative movement of an element relative to the other elements.

Selon un deuxième mode de réalisation illustré schématiquement par les figures 11 et 12, le câble détecteur 6 est remplacé par un commutateur 6' disposé dans la partie inférieure de l'élément 2', sur la branche 221' de la pièce support. Les plaquettes 212 et 222 sont supprimées. Ce commutateur comprend un bras élastique 61' mobile entre une position de repos (ou position déployée) et une position rétractée. Le bras élastique traverse la branche 221' de l'élément 2' via une ouverture. Son extrémité distale est équipée d'une sphère 62'. Lorsque le bras élastique 61' est en position de repos, la sphère 62' est présente dans un logement 214' ménagée dans la branche 211' de l'élément placé en dessous. Lorsque un élément 2' se déplace en rotation par rapport à un élément 2' adjacent, la sphère 62' sort du logement 214' et le bras élastique passe en position rétractée. Le passage en position rétractée du bras élastique indique alors que l'élément 2 associé s'est déplacé.According to a second embodiment schematically illustrated by the Figures 11 and 12 , the sensor cable 6 is replaced by a switch 6 'disposed in the lower part of the element 2', on the branch 221 'of the support piece. Platelets 212 and 222 are removed. This switch comprises an elastic arm 61 ' movable between a rest position (or extended position) and a retracted position. The elastic arm passes through the branch 221 'of the element 2' via an opening. Its distal end is equipped with a sphere 62 '. When the elastic arm 61 'is in the rest position, the sphere 62' is present in a housing 214 'formed in the branch 211' of the element placed below. When an element 2 'moves in rotation relative to an adjacent element 2', the sphere 62 'emerges from the housing 214' and the elastic arm moves to the retracted position. The transition to the retracted position of the elastic arm then indicates that the associated element 2 has moved.

Dans les deux modes de réalisation précédents, le dispositif de détection est monté sur un poteau intermédiaire PI et chaque élément 2 est mobile en rotation autour d'un axe X.In the two previous embodiments, the detection device is mounted on an intermediate pole PI and each element 2 is rotatable about an axis X.

Selon un autre mode de réalisation illustré par les figures 13 à 15, les éléments 2" du dispositif de détection 1" sont couplés entre eux par des moyens de couplage 29 de manière à pouvoir pivoter et/ou coulisser horizontalement les uns par rapport aux autres selon un axe sensiblement horizontal. Avec ce mode de réalisation, il n'est plus nécessaire de monter le dispositif de détection sur un poteau intermédiaire. Les éléments 2" sont portés par les fils et sont mobiles en translation et en rotation les uns par rapport aux autres.According to another embodiment illustrated by the Figures 13 to 15 , the elements 2 "of the detection device 1" are coupled together by coupling means 29 so as to be pivotable and / or horizontally slide relative to each other along a substantially horizontal axis. With this embodiment, it is no longer necessary to mount the detection device on an intermediate pole. The elements 2 "are carried by the son and are movable in translation and in rotation relative to each other.

Comme dans les modes de réalisation précédents, les éléments 2" comportent chacun une paroi verticale à laquelle est fixé un fil F et des parois horizontales supérieure et inférieure s'étendant à partir des extrémités de la paroi verticale. Chaque élément 2" est constitué par une pièce en U, dont la base 200" forme la paroi verticale et les branches 211" et 221" forment les parois horizontales supérieure et inférieure. Des ouvertures 25" et 26" (non représentés sur les figures) sont ménagées dans les parois horizontales supérieure et inférieure pour le passage du câble détecteur 6". Des cales 260" sont avantageusement introduites de part et d'autre du câble détecteur dans les ouvertures 26" et 25" pour empêcher l'effet ciseau sur le câble.As in the previous embodiments, the elements 2 "each comprise a vertical wall to which is attached a wire F and upper and lower horizontal walls extending from the ends of the vertical wall. a U-shaped part whose base 200 "forms the vertical wall and the branches 211" and 221 "form the upper and lower horizontal walls, openings 25" and 26 "(not shown in the figures) are formed in the horizontal walls superior and The shims 260 "are advantageously introduced on either side of the detector cable into the openings 26" and 25 "in order to prevent the scissors effect on the cable.

Les éléments 2" sont couplés entre eux par des moyens de couplage 29, une première partie des moyens de couplage étant portée par un premier élément 2", l'autre partie des moyens de couplage étant portée par un deuxième élément 2", adjacent au premier élément. La première partie des moyens de couplage consiste par exemple en une tige 291 sensiblement horizontale, de section circulaire, s'étendant le long de l'axe Z et fixée à la paroi verticale du premier élément comme illustré aux figures 13 à 15. La deuxième partie des moyens de couplage consiste en des oreilles 292 s'étendant de part et d'autre de la paroi verticale du deuxième élément, les dites oreilles étant munies de perçages destinées à recevoir la tige 291 de sorte que le deuxième élément puisse coulisser et/ou pivoter autour de cette tige.The elements 2 "are coupled together by coupling means 29, a first part of the coupling means being carried by a first element 2", the other part of the coupling means being carried by a second element 2 ", adjacent to the The first part of the coupling means consists for example of a substantially horizontal rod 291, of circular section, extending along the Z axis and fixed to the vertical wall of the first element as illustrated in FIGS. Figures 13 to 15 . The second part of the coupling means consist of lugs 292 extending on either side of the vertical wall of the second element, said lugs being provided with bores intended to receive the rod 291 so that the second element can slide and / or rotate around this rod.

Ce troisième mode de réalisation a pour avantage principal de ne pas nécessiter de poteau intermédiaire pour son montage sur la clôture.This third embodiment has the main advantage of not requiring an intermediate pole for mounting on the fence.

Bien que l'invention ait été décrite en liaison avec différents modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention.Although the invention has been described in connection with various particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

Claims (13)

  1. Intrusion detection device for an expansive fence of wires consisting of two end posts (PE) between which the wires (F) are stretched substantially horizontally, characterized in that it comprises detection means capable of detecting the displacement of at least one wire relative to the other wires, said detection means comprising:
    - at least first and second substantially identical elements (2, 2', 2") mounted one above the other and to each of which is fixed a corresponding wire (F), said first and second elements being capable of being displaced in translation and/or in rotation relative to one another, and
    - a detection member (6, 6', 6") for detecting the displacement of the first element relative to the second element under the effect of an external force applied to the wire fixed to the first element.
  2. Device according to Claim 1, characterized in that said first and second elements (2) are substantially in contact with one another.
  3. Device according to Claim 2, characterized in that each of said first and second elements (2, 2') is free to rotate about a substantially vertical rotation axis (X).
  4. Device according to Claim 3, characterized in that said first and second elements (2, 2') are rotationally mobile about a substantially vertical axial rod (3) extending along said rotation axis (X), said axial rod being assembled to an intermediate post (PI) placed between said end posts.
  5. Device according to Claim 4, characterized in that said first and second elements (2, 2') each have a vertical wall (20) to which a corresponding wire is fixed and top and bottom horizontal walls (21, 22) extending from the ends of the vertical wall, said top and bottom horizontal walls being provided with first openings (23, 24) arranged along said rotation axis for passage of the axial rod.
  6. Device according to Claim 2, characterized in that said first and second elements (2") are coupled together by coupling means (29) so as to be able to pivot and/or slide relative to one another on a substantially horizontal axis (Z).
  7. Device according to Claim 6, characterized in that said first and second elements (2") each have a vertical wall to which a corresponding wire is fixed and top and bottom horizontal walls extending from the ends of the vertical wall, said coupling means being asembled to the walls of said first and second elements.
  8. Device according to Claim 5 or 7, characterized in that the detection member comprises a detector cable (6, 6"), sensitive to pressure, passing through the top and bottom horizontal walls of the first and second elements via second openings (25, 26) arranged on a substantially vertical second axis (Y), the dimensions of the second openings being substantially equal to the dimensions of the cross section of the detector cable.
  9. Device according to Claim 8, characterized in that it further comprises at least one shim (260, 260") capable of being introduced into at least one of said second openings (25, 26) of the bottom and top horizontal walls of the first and second elements.
  10. Device according to Claim 9, characterized in that it comprises two shims (260, 260") capable of being introduced into said second opening on either side of the detector cable in the direction of displacement of the element.
  11. Device according to Claim 9 or 10, characterized in that each shim has a height greater than the thickness of the bottom or top horizontal wall.
  12. Device according to any one of the preceding claims, characterized in that each of said first and second elements is equipped with aa assembling means for fixing the corresponding wire to the vertical wall of the element.
  13. Fence comprising one or more of the expanses of wires in succession, characterized in that it is equipped with an intrusion detection device according to any one of Claims 1 to 11.
EP12743699.6A 2011-07-18 2012-07-18 Device for detecting intrusion Active EP2734986B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1156490A FR2978277B1 (en) 2011-07-18 2011-07-18 INTRUSION DETECTION DEVICE
PCT/EP2012/064124 WO2013011074A1 (en) 2011-07-18 2012-07-18 Device for detecting intrusion

Publications (2)

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EP2734986A1 EP2734986A1 (en) 2014-05-28
EP2734986B1 true EP2734986B1 (en) 2016-08-17

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WO (1) WO2013011074A1 (en)

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Publication number Priority date Publication date Assignee Title
CN109287501A (en) * 2018-09-28 2019-02-01 侯马高知新生物科技有限公司 A kind of adjustable grassland herding fence
CN110164068B (en) * 2019-06-06 2024-04-26 南京派光智慧感知信息技术有限公司 Stress detection guardrail

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Publication number Priority date Publication date Assignee Title
IL42470A (en) * 1973-06-11 1976-01-30 Israel Aircraft Ind Ltd Electrical switch responsive to sudden movements
IL69945A (en) * 1983-10-10 1987-12-20 Israel Aircraft Ind Ltd Taut wire fence system and sensor therefor
US5852402A (en) * 1997-10-28 1998-12-22 Safeguards Technology, Inc. Intrusion detection system
FR2820865B1 (en) 2001-02-09 2003-04-18 Serpe Iesm Soc D Etudes Et De INTRUSION DETECTOR DEVICE FOR FENCE

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WO2013011074A1 (en) 2013-01-24
FR2978277A1 (en) 2013-01-25
FR2978277B1 (en) 2016-12-23
EP2734986A1 (en) 2014-05-28

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