WO2004025597A1

WO2004025597A1 - Composite security system, method for the production and use thereof

Info

Publication number: WO2004025597A1
Application number: PCT/EP2003/008660
Authority: WO
Inventors: Rüdiger BRÄUNING; Jochen Neutz; Michael Niehaus; Wolfgang Becker; Wilhelm Eckl
Original assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Priority date: 2002-09-09
Filing date: 2003-08-05
Publication date: 2004-03-25
Also published as: DE50304156D1; EP1537551B1; DE10241709A1; EP1537551A1; DE10241709B4

Abstract

The invention relates to a composite security system against unauthorised access by damaging the object or objects to be secured, and to a method for the production thereof. The invention is based on a multi-layered system which is connected to the object or objects to be secured or which is integrated therein. The inventive composite security systems can be used in a variety of ways to protect mobile or immobile objects from unauthorised access.

Description

Security system, process for its production and its use

The invention relates to a security system against unauthorized access by damage to objects or objects to be secured and a method for its production. The invention is based on a multilayer system which is connected to or integrated into the object or object to be secured.

Single-layer protection systems are already known from the prior art, which have a securing structure made of a metal grid (WO 02/12671). These metal grids, which are built into the objects to be secured, are based on the fact that a current is applied to them, so that they act as a conductive layer. In the event of unauthorized access to the object, for example by breaking open with the help of an object, the conductor is interrupted, which can then trigger appropriate signals and an alarm. However, the manufacture and processing of such lattice structures is relatively complex and therefore expensive. Another disadvantage of the prior art resides in the fact that the mesh size of the metal grids cannot be chosen to be arbitrarily small, so that certain access techniques cannot be prevented. For example, access is possible by drilling out with a drill whose diameter is smaller than the mesh size.

Based on this, it was an object of the present invention to provide objects and objects of any shape and size with a cost-effective and easy-to-install protection system against unauthorized access, which triggers a mechanism or alarm regardless of the type of access and thus comprehensive protection of objects or Objects.

This object is achieved by the safety system with the features of claim 1 and the method for its production with the features of claim 12. In claim 22 the use of the interlocking system is described. The further dependent claims show advantageous further developments.

According to the invention, a security composite system against unauthorized access through damage to objects or objects to be secured is provided, which has at least two conductive layers and at least one non-conductive intermediate layer arranged between the conductive layers. This composite system is connected to the object to be secured or integrated in it. This is to be understood to mean that the composite system can be arranged anywhere on the object, for which purpose, for example, the casing of the object with the composite system, the inner lining of the object with the composite system or also the direct integration of the composite system into the outer wall or comparable structures of the object or object are to be counted.

An essential advantage of such a security composite system is that the composite system can be shaped or reshaped into almost any geometries. For example, it is possible to provide a suitcase from two shells or from a shell with a film hinge to match the shape of the composite system, whereas, according to the prior art, only solutions are known in which several flat individual parts are used, while angular structures with additional edge elements must be provided. Another advantage over the metal grids known from the prior art is the significantly lower cost in terms of material, production and processing costs. Furthermore, in contrast to the use of metal grids, the composite system according to the invention is seamless, so that the detection of unauthorized access by e.g. Drilling is made possible. Further advantages associated with the subject matter of the invention are e.g. the lower weight, the simpler construction and the possibility of using composite systems with a very small layer thickness. In addition, the composite system according to the invention has very fast response times, e.g. are important with regard to unauthorized access by shelling.

At least one of the conductive layers is preferably designed as a perforation-free flat layer. In a variant of the fuse composite system according to the invention, the at least two conductive layers consist of an electrically conductive material and the non-conductive layer consists of an electrically insulating material. Polymers, copolymers and composite materials, but preferably metals, are preferred as the electrically conductive material, while the intermediate layer is formed from a non-metal, a composite material and particularly preferably from an insulating polymer or copolymer. Aluminum or copper are to be mentioned as particularly preferred metallic materials.

A further variant of the security composite system provides that it is formed from at least two conductive layers made of an optically conductive material and a non-conductive layer made of an optically non-conductive material. Glass and / or transparent polymers or copolymers are preferred as optically conductive materials. The intermediate layer is preferably formed from an optically non-transparent glass, polymer or copolymer.

The interlocking system is preferably connected to at least one detection unit for checking the electrical and / or optical status of the interlocking system. This in turn is in direct connection with an alarm triggering unit, which triggers in the event of deviations in the electrical and / or optical state controlled by the detection unit. For the variant in which the electrical state is checked, a voltmeter, amperometer or ohmmeter is preferably used as the detection unit. But it can Ohmmeter. However, a detection unit can also be used to measure the capacitance or to measure the detuning of a resonant circuit that is in resonance.

In the case of the variant in which the optical state is checked, an optical sensor is preferably used as the detection unit, which serves to compare the at least two optically conductive layers, one of the layers serving as a reference. However, it is also possible to use registration units for both variants at the same time.

The technical implementation of an optical security composite system is such that in one of the two optically conductive layers optical signals, e.g. via a light emitting diode. The further optically conductive layer is provided with an optical sensor, e.g. a photodiode, which controls the optical state of the further optically conductive layer. If the optical fuse system is damaged, the optically non-conductive layer is broken, so that light signals from the optically conductive layer provided with the radiation source penetrate into the optically conductive layer provided with the optical sensor. These light signals can then be detected with the aid of the optical sensor, which then triggers the alarm triggering unit.

There are no restrictions with regard to the geometry of the screening composite system. In this way, flat, curved or angled shapes can be realized. According to the invention, a method for producing objects or objects secured against unauthorized access by damage is also provided, which is based on the following method steps:

a) First, a security composite system with at least two conductive layers and at least one non-conductive intermediate layer arranged between the conductive layers is produced.

b) The security composite system produced in this way is then integrated in or on the object or object. All of the integration variants described above can be used for this.

In step a), the securing composite system is preferably produced by co-extrusion. A further variant for step a) provides that the securing composite system is carried out by metallization on both sides, preferably a polymer film as an intermediate layer.

The composite system produced in this way can _.

Connection is preferably subjected to a corresponding shaping by means of a thermoforming process, the geometries being arbitrary.

In an advantageous development of the method, in step b) the security composite system is subjected to an injection molding process or the extrusion process together with a molding compound, with the formation of the object. A further advantageous variant of the method provides that steps a) and b) follow one another be carried out by means of an injection molding process. Alternatively, however, it is also possible for steps a) and b) to be carried out in a single process step by co-extrusion or multi-component injection molding.

The fuse link system is preferably connected to a detection unit for checking the electrical and / or optical state in relation to the intact state of said fuse link system. The detection unit, in turn, is in direct contact with an alarm triggering unit, which triggers when the electrical and / or optical state deviates. With regard to the connection of these two units to the security system, it is possible to integrate them internally into the object or object to be secured or to connect the units externally. With regard to the different variants for the registration unit, reference is made to the statements made above.

The security composite systems according to the invention are used in a variety of ways for protecting mobile or immobile objects or objects from unauthorized access. Mobile objects include, for example, means of transport such as vehicles, planes, ships or trains. Transport items such as suitcases, bags, boxes or parcels are also to be included in the mobile items. Buildings, for example, can be understood under the term immobile objects. In addition to protection against damage, the composite fuse systems according to the invention can also be used to provide shielding against external influences, such as, for example, magnetic and electromagnetic fields and pulses, and also static charges. Another example of the application is the shielding against espionage attacks on certain objects or buildings, for example by listening to magnetic or electromagnetic fields or the shielding against x-rays, for example.

The subject according to the invention is intended to be explained in more detail with reference to the following figures, without restricting it to these embodiments.

Figure 1 shows an inventive security system

Figure 2 shows a security system integrated into an object

FIG. 3 shows an exploded drawing of a security composite system according to the invention

1 shows a cross section of the safety system 4. This consists of two electrically conductive layers 1 and 3 made of, for example, an electrically conductive material, such as metal (eg copper or aluminum) or an electrically conductive plastic, and an electrically insulating intermediate layer 2 made of, for example, a non-electrically conductive plastic. Production can be carried out, for example, by metallizing layers 1 and 3 of a plastic film 2, by co-extruding electrically conductive layers 1 and 3 and a non-conductive layer 2, or by multi-component injection molding. ß or successive injection molding of the individual layers 1, 2 and 3 or by gluing the individual layers 1, 2 and 3, for example. A suitable choice of the thicknesses of layers 1, 2 and 3 and an electrical voltage applied between layers 1 and 3 can be used to detect unauthorized access by, for example, bombardment, drilling, sawing, breaking open, etc., since in this case a voltage applied between layers 1 and 3 due to the change in resistance between the

Layers 1 and 3 will decrease significantly or completely to 0.

In addition, e.g. Any three-dimensional irregular and non-irregular structures can be transferred to the heating system system 4 by means of thermoforming or deep drawing, in order to e.g. increase security against unauthorized manipulation.

Of course, the multilayer structure 4 can also be designed such that the layers 1 and 3 are made of an optically conductive material, such as e.g. Glass or optically transparent plastic, and the layer 2 made of an optically non-conductive material, such as an optically non-transparent plastic. By means of optical radiation coupled into layer 1 (3) and an optical sensor coupled to layer 3 (1), an unauthorized access can be recognized analogously to the multilayer structure 4 based on electrical conductivity.

Of course, other multilayer structures can also be realized by varying the sequence of layers 1, 2 and 3.

2 shows a cross section through an object 7 1 and two electrically non-conductive cover layers 5 and 6, which can serve, for example, to protect the sealing composite system 4 or to increase the dimensional stability of the object 7.

To e.g. a case with the safety system

4 can be protected first by e.g. Co-extrusion can be produced. The fuse system 4 is then shaped by means of thermoforming into the desired geometry and the layers are injection molded

5 and 6 (in the injection molding of the first cover layer 5 or 6, any structures, such as an irregular grain to protect the security composite system 4 against unauthorized manipulation on the tool surface on the tool side opposite the cover layer 5 or 6 to be sprayed Multilayer construction can be transferred, these structures can also be used for

Thermoforming are transferred), alternatively the object 7 can also be produced directly during the co-extrusion, so that after thermoforming the layers 5 and 6 are no longer necessary.

It is also possible to bring the individual layers 1, 2, 3, 5 and 6 directly into the desired shape by multi-component injection molding or by successive injection molding of the individual or more layers.

When using conductive substances, such as metals, for layers 1 and 3, either a foil 2 consisting of, for example, electrically non-conductive plastic can be metallized on both sides, or by, for example, gluing individual metal foils 1 and 3 and a plastic film 2 are assembled. This structure can then be brought into the desired shape by, for example, thermoforming or, for example, injection molding. As an alternative to this, the object 7 can also be produced by, for example, overmolding of, for example, metal foils or plates.

In order to protect the case seamlessly through the object 7 with the multilayer structure 4, e.g. the individual components, which consist of the object 7, of which the case is composed, are constructed in such a way that they overlap one another. Functional elements, such as Handles, hinges, sensors, locks, etc. can e.g. by gluing, welding or other processes such as Functional elements provided for injection molding, which do not lead to penetration of the object 7 or of the multilayer structure 4, are attached.

FIG. 3 shows an exploded drawing of a security composite system according to the invention, which is constructed analogously to the system described in FIG. The statements made there can therefore also be applied to this figure.

Claims

claims

1. Security system against unauthorized access by damage to objects to be secured or

Objects with at least two conductive layers and at least one non-conductive intermediate layer arranged between the conductive layers, which is connected to the object or object or integrated therein.

2. A security composite system according to claim 1, characterized in that at least one conductive layer is designed as a non-perforated flat layer.

3. A fuse link system according to at least one of the preceding claims, characterized in that the at least two conductive layers are formed from an electrically conductive material and the non-conductive layer consists of an electrically insulating material.

4. Safety composite system according to the preceding claim, characterized in that the electrically conductive material is selected from the group metal, polymer, copolymer and composite material and the intermediate layer is selected from the group non-metal, polymer, copolymer and composite material.

5. Security system according to the preceding claim, characterized in that the metal is aluminum or copper.

6. Safety composite system according to at least one of claims 1 or 2, characterized in that the at least two conductive layers are formed from an optically conductive material and the non-conductive layer consists of an optically non-conductive material.

7. Compound fuse system according to the preceding claim, characterized in that the optically conductive material is glass and / or a transparent polymer or copolymer and the intermediate layer consists of an optically non-transparent glass, polymer and / or copolymer.

8. Interlocking system according to at least one of the preceding claims, characterized in that the interlocking system is connected to at least one detection unit for checking the electrical and / or optical state of the interlocking system and an alarm triggering unit which triggers in the event of deviations in the electrical and / or optical state ,

9. A fuse link system according to claim 8, characterized in that the detection unit for checking the electrical status is a voltmeter, amperometer, ohmmeter or a detection unit for measuring the capacitance or the detuning of a resonant one

Resonant circuit is.

10. A fuse system according to claim 8, characterized in that the detection unit for checking the optical state is an optical sensor for comparing the at least two optically conductive layers, one of the layers serving as a reference.

11. Safety system according to at least one of the preceding claims, characterized in that the safety system has a flat, curved or angled shape.

12. A method for producing objects secured against unauthorized access by damage, comprising the following steps:

a) production of a fuse composite system with at least two conductive layers and at least one non-conductive intermediate layer arranged between the conductive layers,

b) Integration of the security system in or on the object.

13. The method according to claim 12, characterized in that in step a) the security composite system is produced by co-extrusion.

14. The method according to at least one of claims 12 or 13, characterized in that in step a)

Securing system by metalizing a non-metal on both sides, e.g. a polymer film as an intermediate layer.

15. The method according to at least one of claims 12 to 14, characterized in that after step a)

Security system is subjected to a thermoforming process.

16. The method according to at least one of claims 12 to 15, characterized in that in step b) the securing composite system together with a molding compound is subjected to an injection molding or extrusion process to form the object.

17. The method according to at least one of claims 12 to 16, characterized in that steps a) and b) in succession by means of injection molding or

Extrusion can be carried out.

18. The method according to at least one of claims 12 to 17, characterized in that steps a) and b) are carried out in a single process step by co-extrusion or multi-component injection molding.

19. The method according to at least one of claims 12 to 18, characterized in that the security system is connected to a detection unit for checking the electrical and / or optical state of the security system and an alarm triggering unit which triggers in the event of deviations in the electrical and / or optical condition.

20. The method according to claim 19, characterized in that electrically insulating as non-conductive layers

Layers and electrically conductive layers are used as conductive layers, to which a voltage is applied, the voltage being checked using a voltmeter or the resistance using an ohmmeter as the detection unit.

21. The method according to claim 19, characterized in that optically non-conductive as non-conductive layers

Layers and optically conductive layers are used as conductive layers, the one of the optically conductive layers having a radiation source, for example a light-emitting diode, and the other conductive layer is connected to an optical sensor, for example a photodiode, which controls the optical state of the other optically conductive layer.

22. Use of the security system according to at least one of claims 1 to 11 for protecting mobile or immobile objects or objects from unauthorized access.

23. Use according to claim 22 for the protection of

Means of transport such as vehicles, airplanes, ships and trains.

24. Use according to claim 22 for the protection of

Transport items such as suitcases, bags, boxes and parcels.

25. Use according to claim 22 for the protection of buildings.