EP1632918A2 - Sicherheitsvorrichtung mit elektrischem Zaun - Google Patents

Sicherheitsvorrichtung mit elektrischem Zaun Download PDF

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Publication number
EP1632918A2
EP1632918A2 EP05356142A EP05356142A EP1632918A2 EP 1632918 A2 EP1632918 A2 EP 1632918A2 EP 05356142 A EP05356142 A EP 05356142A EP 05356142 A EP05356142 A EP 05356142A EP 1632918 A2 EP1632918 A2 EP 1632918A2
Authority
EP
European Patent Office
Prior art keywords
elementary
safety device
wall
electrical
wires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05356142A
Other languages
English (en)
French (fr)
Other versions
EP1632918A3 (de
Inventor
Jean-Paul Perret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1632918A2 publication Critical patent/EP1632918A2/de
Publication of EP1632918A3 publication Critical patent/EP1632918A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to security devices with a ribbon electrical network, for detecting attempts of burglary through a wall or in an enclosure provided with said safety device.
  • Such devices have been developed, for example, in the field of fund transport, by designing enclosures or carrying cases whose walls are provided with a safety device with a flat electrical network, embedded in the wall of the cable. enclosure or the carrying case, and associated with an electronic control device that produces a signal in case of deterioration of the electrical network tablecloth. This signal is then used to trigger a destruction device that destroys the contents of the enclosure or the carrying case, for example by projecting a liquid or a marker gas that marks the bank notes to make them unusable.
  • Such a device is thus likely to deter thieves, who no longer find any interest in seizing the transport bag, to the extent that they can not then open or cut without destroying the contents of the suitcase.
  • Document DE 28 56 819 A1 proposes, in order to make it more difficult to perform a bridging bypass, to multiply the conductive wires by forming a composite wire with two safety wires embedded in an insulating layer around which wires reinforcement are themselves surrounded by an insulating coating.
  • Document DE 30 06 999 A1 proposes, for the same reason, to use a composite yarn comprising in its center two return trips of the same conductive thread, embedded in an insulating layer, with furthermore other yarns. and a final insulation layer.
  • Document FR 2,564,681 A1 proposes, for the same reason, to use a composite wire comprising a central conductive core surrounded by an insulating sheath itself surrounded by six conductive and contiguous strands.
  • the ribbon electrical networks incorporated in a wall to be secured are associated with an electronic control device which detects the breakage of the electrical wire constituting the electrical network sheet. But it remains possible, with such an arrangement, to melt or delicately use the material in the vicinity of two remote areas of the electrical conductor, to expose two corresponding sections of the conductor, and then establish, by welding an external conductor , an electrical bypass which then inhibits the entire conductor area between the two points of diversion. It is then easy to pierce the wall in the area thus obscured, without triggering the destruction device. Once pierced, the wall allows to introduce a means that neutralizes the destruction device, for example a polymerizable foam which then prevents the spread of the liquid or the tracer gas, and the wall or enclosure can then be opened by any means.
  • a means that neutralizes the destruction device for example a polymerizable foam which then prevents the spread of the liquid or the tracer gas
  • the problem proposed by the present invention is to design a new electrical network safety device structure that prevents any attempt to inhibit a slick area, so as to reliably detect any attempt to intrude into a slick area. a wall provided with such a device.
  • the invention aims to prevent any possibility of establishing an electrical shunt between two successive zones of a ribbon electrical circuit.
  • Another object of the invention is to design such a device structure which is relatively simple to manufacture, to be produced at a reasonable cost.
  • Another object of the invention is to design such a device that can be used in any form usually necessary for walls or security enclosures, that is to say, shapes that can be flat, but also shapes with angular shapes. relatively small radii of curvature.
  • the invention proposes a security device for detecting unauthorized intrusion attempts through a wall, comprising at least one sheathed composite wire arranged in a ribbon electrical network which develops according to the invention.
  • the sheathed composite wire comprises at least two elementary electrical wires insulated from one another by an insulating means and assembled with one another in a composite wire itself sheathed; the composite yarn is held mechanically in place in the wall by mechanical holding means; each of the two insulated individual electrical wires is individually connected to a respective pair of inputs of the electronic control device, itself adapted to detect both the breakage of at least one of the elementary electrical wires and the mutual contact with each other. at least two of the elementary electrical wires with each other, and to produce said output signal in the event of such breaking or mutual contact detection.
  • the elementary electrical wires can be assembled so as to be parallel along their length.
  • the elementary electrical wires can be twisted together along their length.
  • the insulating means of the elementary electrical wires may be a covering, that is to say a double twisted helical winding of a silk thread, cotton, nylon or other suitable material having properties electrical insulation.
  • the insulation is made by providing the wire with great flexibility, so that the device is adapted to be shaped according to the most diverse forms to follow the contours of the speakers to secure.
  • the mechanical resistance means of the composite yarn may comprise non-extensible flexible lateral connection means. It is indeed necessary to prevent any attempt to separate two successive areas of the composite wire, spacing which would then allow drilling of the wall by a piercing tool. And it is preferable to allow deformations by bending the web to follow all types of wall contours.
  • the lateral connection means may comprise son or strips of thermoformable material chain. This allows to give the device, by a thermoforming operation, a non-planar shape suitable for placing in a plastic injection mold.
  • the lateral connection means have a melting point higher than the melting temperature of the insulating means of the elementary electric wires. In this way, any attempt at soft attack by localized fusion of a zone of electrical network in a sheet, and / or any attempt at welding on an elementary electric wire, leads to the fusion of the insulating means between the elementary electric wires, and causes the detection of the intrusion and the triggering of the device.
  • the composite yarn is arranged in a back-and-forth arrangement with parallel strands of the weaving type, associated with warp yarns or bands which provide the lateral connection of the strands.
  • the composite yarn in an arrangement in stitches, loops or eyelets, of knitting or picking type.
  • the elementary electric wires may advantageously have a small diameter, which further complicates burglary attempts. Indeed, elementary electrical son of small diameter are particularly fragile, and tend to break by triggering the device at the least attempted burglary.
  • the diameter of the elementary electrical wires may advantageously be between about 0.04 millimeters and about 0.20 millimeters. A good compromise can be achieved with a wire about 0.07 millimeters in diameter.
  • the elementary intermediate gap between the elementary electric wires must be small enough to prohibit the drilling of a hole usable for the injection of a neutralizing product, and it will be possible to choose a center distance of about ten times the diameter of the elementary electric wires, that is to say between 0.04 centimeters and 0.1 centimeters, preferably about 0.07 centimeters for a wire about 0.07 millimeters in diameter.
  • the invention also proposes the use of such a security device defined above, as intrusion detection means through a wall or in an enclosure.
  • the invention proposes a security wall or enclosure comprising at least one security device as defined above.
  • a security wall or enclosure comprising at least one security device as defined above.
  • the electrical network of the safety device will be integrated in a layer of synthetic foam, which may be associated with at least one rigid inner layer.
  • the rigid inner layer may have a rugged shape, while the ribbon electrical network can follow only approximately the outline of the rigid inner layer, the joining of one and the other being provided by the synthetic foam layer. This facilitates the securing of speakers whose walls have very animated inner forms.
  • the invention proposes a method for manufacturing a wall or a safety enclosure provided with at least one electrical network safety device in a web as defined above, the method comprising a step thermoforming of the electrical network in a sheet. Thermoforming facilitates subsequent assembly steps by overmolding.
  • a security device comprises an electrical network 1 in a sheet electrically connected to an electronic control device 2 able to produce an output signal on an output 3 in the event of a fault. of the electricity network 1.
  • the electrical network 1 comprises at least two elementary electric wires 4 and 5, insulated from each other by an insulating means and assembled together with a composite wire 6.
  • the composite wire 6 is mechanically held in the form of a sheet by mechanical holding means 7, and is arranged to cover the necessary surface, that is to say the surface of a wall that is to be secured, with elementary intermediate gaps 8 smaller than a given minimum area.
  • the elementary electric wire 4 is individually connected to a respective pair of inputs 2a and 2b of the electronic control device 2.
  • the elementary electric wire 5 is individually connected to a respective pair of inputs 2c and 2d of the electronic device of FIG. control 2.
  • the electronic control device 2 is itself adapted to detect both the breaking of at least one of the elementary electric wires 4 or 5 and the mutual contact of at least two of the elementary electric wires 4 and 5. one with the other, and to produce said output signal on the output 3 in case of such detection.
  • the composite wire 6 is formed of two elementary electrical wires 4 and 5.
  • composite wires 6 comprising more than two elementary electrical wires 4 and 5, for example example three or four son isolated from each other by an insulating means and assembled with each other in the same sheath.
  • the elementary electric wires 4 and 5 are assembled so as to be parallel along their length.
  • the insulation can be made by an insulating means such as a covering, that is to say an inverted double coil winding using a wire insulation around the conductive wire 4 or 5.
  • Figure 3 illustrates another embodiment in which the composite wire 6 is formed of two elementary electrical son 4 and 5 assembled in twist on their length.
  • the advantage of a twisted arrangement according to Figure 3 is to make it even more difficult separation of the elementary electrical son 4 and 5 relative to each other for a possible specific welding of a bypass conductor.
  • FIG. 4 illustrates another embodiment of a composite wire 6, an embodiment in which the elementary electrical wires 4 and 5 are isolated from one another by one or two insulating layers 4a and 5a. , the assembly being sheathed by a sheath 6a.
  • the sheathing of the composite wire 6 can be provided by wrapping.
  • the elementary electrical wires may advantageously be chosen with a diameter of between approximately 0.04 millimeters and 0.20 millimeters. A good compromise can be achieved with a wire about 0.07 millimeters in diameter.
  • the elementary intermediate gap 8 between the axis of the elementary electric wires 4 and 5 has a size of approximately ten times the diameter of the elementary electric wires, that is to say between approximately 0.04 centimeters and 0.1 centimeters, preferably about 0.07 centimeters for a wire about 0.07 millimeters in diameter.
  • the mechanical holding means 7 of the composite yarn 6 comprise non-extensible flexible lateral connection means, such as non-extensible flexible material yarns or strips.
  • the son or warp strips 7 may be of thermoformable material, allowing the thermoforming of the electrical network sheet for insertion into a non-planar wall.
  • the lateral connection means 7 may have a melting temperature greater than the melting temperature of the insulating means 4a or 5a of the elementary electrical wires 4 and 5, so that the melting of the lateral connection means 7 to separate or discard the elementary electrical son 4 and 5 involves the prior destruction of the insulating means, which then causes the mutual contact of the elementary electrical wires 4 and 5 with each other and the immediate triggering of the device.
  • FIG. 6 which illustrates the arrangement of the composite yarn 6 with parallel strand-backs, of weaving type on warp yarns or strips 7.
  • Figure 7 illustrates another arrangement according to the invention, wherein the composite wire 6 is arranged in a mesh arrangement, loops or eyelets 7a of knitting or picking type.
  • FIGS. 8 and 9 which illustrate an application of the security device according to the invention by integration in a wall 9 of a secure enclosure 10, are now considered.
  • the wall 9 of the enclosure 10 comprises a rigid inner layer 11, and the electrical network safety device 1 in the form of a sheet constitutes an intermediate layer integrated in a layer of synthetic foam 12, by example in charged polyurethane.
  • the composite wire 6 seen in section and composed of the elementary electrical son 4 and 5 in a sheath 6a there is found the composite wire 6 seen in section and composed of the elementary electrical son 4 and 5 in a sheath 6a.
  • the mechanical resistance means are, in this embodiment, constituted by the synthetic foam 12 itself which is sufficiently compact.
  • the lateral connection means comprise son or strips of chain 7 made of thermoformable material, so as to thermoform the front sheet network 1 its arrangement in a mold against the rigid inner layer 11, then overmolding by the foam 12.
  • FIG. 5 which illustrates a possible embodiment according to the invention for the electronic control device 2.
  • This figure shows the composite wire 6 consisting of the elementary electrical wires 4 and 5, the end terminals of which are connected to the electronic control device 2.
  • the electronic control device 2 comprises, in this embodiment, a first impedance control circuit 20, able to control the impedance of the first elementary electric wire 4.
  • a first impedance control circuit 20 able to control the impedance of the first elementary electric wire 4.
  • the structure of the first impedance control circuit 20 may be of any type within the reach of those skilled in the art, for example a series current generator with a current sensor and means for relating the generator voltage to the measured current and for deriving the value of the impedance of the elementary electric wire.
  • the output 20c of the first impedance control circuit 20 is connected to a first comparator 21, which compares the value of the measured impedance with a maximum permissible unit impedance value threshold for the first elementary electrical wire 4.
  • the comparator 21 produces on its output 21a a signal when the measured impedance exceeds the maximum unit impedance threshold, and this signal is sent to an OR circuit 22 whose output is connected to the output 3 of the control device 2.
  • the control device 2 also comprises, in a similar manner, a second impedance control circuit 23, similar to the first impedance control circuit 20, the inputs 23a and 23b of which are respectively connected to the two ends of the second electrical wire. 5.
  • the second impedance control circuit 23 is able to measure the impedance of the second elementary electric wire 5, which measurement is then compared to a maximum permissible unit impedance threshold by a second comparator 24, which generates on its output 24a a signal sent to the OR circuit 22.
  • the control device 2 comprises a third impedance control circuit 25, similar to the impedance control circuits 20 and 23, and whose inputs 25a and 25b are respectively connected to the first elementary electrical wire 4 and the second elementary electrical wire 5.
  • the third impedance control circuit 25 is able to measure the mutual impedance between the elementary electrical wires 4 and 5, the value thus measured being sent to a third comparator 26 which compares this measured value of mutual impedance with a minimum permissible mutual impedance threshold and which produces on its output a signal when the mutual impedance is lower than the minimum mutual impedance threshold, the signal being sent to the OR circuit 22.
  • the OR circuit 22 produces on the output 3 a signal when at least one of the comparators 21, 24 and 26 emits a signal signifying that at least one of the elementary electrical wires 4 and 5 has an impedance that is too large, for example a infinite impedance resulting from a cut of the wire, or when the elementary electric wires 4 and 5 are in contact with one another so that their mutual impedance detected by the third impedance control circuit 25 and the comparator 26 is below the minimum mutual impedance threshold.
  • this signal, or output signal controls the triggering of an alarm generator or a destructive device capable of making unusable the content protected by the wall 9 or the enclosure 10.
  • the elementary electrical wires 4 and 5 are mechanically joined to one another in a composite wire 6, so that it is very difficult, practically impossible, to separate them from each other. to the other without destroying them.
  • Maintaining the loops or parallel strands of composite wire 6 by non-extensible lateral connection means prevents the spacing of the loops or strands parallel to each other to increase the size of an elementary intermediate gap 8 and thus allow the drilling of 'a hole.
  • the signal present on the output 3 of the control device 2 can control an alarm or a destruction device which destroys or makes commercially useless the contents of an enclosure 10.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Surface Heating Bodies (AREA)
  • Woven Fabrics (AREA)
EP05356142A 2004-09-06 2005-08-29 Sicherheitsvorrichtung mit elektrischem Zaun Withdrawn EP1632918A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0409498A FR2875048A1 (fr) 2004-09-06 2004-09-06 Dispositif de securite a reseau electrique en nappe

Publications (2)

Publication Number Publication Date
EP1632918A2 true EP1632918A2 (de) 2006-03-08
EP1632918A3 EP1632918A3 (de) 2007-04-18

Family

ID=34948561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05356142A Withdrawn EP1632918A3 (de) 2004-09-06 2005-08-29 Sicherheitsvorrichtung mit elektrischem Zaun

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EP (1) EP1632918A3 (de)
FR (1) FR2875048A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2936638A1 (fr) * 2008-10-01 2010-04-02 Martec Serpe Iesm Systeme de protection de site comprenant une cloture et un dispositif de detection et de controle d'intrusion

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2331280A2 (fr) * 1975-11-13 1977-06-10 Trefilunion Cloture de securite
DE2856819A1 (de) * 1978-12-30 1980-07-17 Wilhelm Tretschoks Geflechtsdraht fuer sicherheitszaeune
CH643077A5 (it) * 1979-08-07 1984-05-15 Ci Ka Ra Srl Rete di recinzione anti-effrazione, procedimento e dispositivo per la sua fabbricazione.
DE3006999A1 (de) * 1980-02-25 1981-09-24 Ernst 4200 Oberhausen Blaser Schaltungsanordnung fuer sicherheitszaeune
FR2564681A1 (fr) * 1984-05-18 1985-11-22 Cogny Sa Element pour cloture de protection a detection de coupure
GB9115972D0 (en) * 1991-07-24 1991-09-11 Gore W L & Ass Uk Improvements in security enclosures
US6215397B1 (en) * 1996-08-13 2001-04-10 Lindskog Innovation Ab Electrical manually portable security case for the storage of theft attractive articles with an electrical mat having at least one elongated electrically conductive wire in a substantially continuous mesh, loop or eye structure
FR2822032B1 (fr) * 2001-03-15 2004-01-23 Brinks France Enveloppe pour le transport ou le stockage de documents ou de valeurs et dispositif de securite pourvu d'une telle enveloppe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2936638A1 (fr) * 2008-10-01 2010-04-02 Martec Serpe Iesm Systeme de protection de site comprenant une cloture et un dispositif de detection et de controle d'intrusion

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Publication number Publication date
FR2875048A1 (fr) 2006-03-10
EP1632918A3 (de) 2007-04-18

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