RU105775U1 - TAPE FILM FOR CREATION OF FLOOR COVERING WITH THE SYSTEM OF SECURITY ALARM SENSORS USING THE EFFECT OF SWITCHING ELECTRIC CONDUCTIVITY IN POLYMER FILMS - Google Patents

Abstract

 A rollable wide tape of type “adhesive tape” consisting of a polymer film made of PVC plastic compound or another flexible polymer with a pronounced effect of switching electrical conductivity under the influence of uniaxial pressure, with electrical conductors and a thin layer of non-drying adhesive adhesive applied to one of its surfaces serving when gluing it with two mutually perpendicular layers to create a system of conductors forming a coordinate {x, y} -grid in such a way that when penetrating the post For unauthorized persons, an additional uniaxial pressure arises under the pressure of the soles of their shoes, causing a local drop in the resistance of the polymer film and shorting of the conductors of the {x, y} network, which, when connecting this system to the simplest computer system, allows you to track the position and trajectories directly on the computer monitor movements of these unauthorized persons.

Description

The utility model relates to techniques for protecting objects from unauthorized access by unauthorized persons, i.e. security alarm equipment, the technical result of which is the operational determination of two-dimensional coordinates, as well as the trajectories of the protected object for one or several unauthorized persons. In a simplified scheme, the system can also be used in the definition of "free-occupied", for example, to determine the number of occupied parking spaces when using roll-up coatings in indoor multi-parking lots.

For this purpose, a coating is created on the floor surface of the protected object, the working element of which is a thin polymer film, on two surfaces of which conductors are fixed, forming a Cartesian grid of the two-dimensional coordinate system {x, y}, and the x-conductors are fixed with one, and the y-conductors - on the other hand, a carrier thin polymer film playing the role of a sensor element. Any polymer film can be used as a carrier, for which the effect of a sharp drop in the film resistance under the influence of uniaxial external pressure [1-5], in particular, a transparent film of polyvinyl chloride plasticized in accordance with the Patent, is quite well expressed. [6] one of the authors of this invention. The ends of the conductors are connected using external wires to a computer on the screen of which a similar {x, y} -grid is displayed on a reduced scale, and the computer program is designed so that when a pair of conductors {x, y} is closed in the flooring at the intersection of the corresponding coordinate axes grid on the computer monitor a bright dot appears.

In the case of unauthorized penetration of protected objects by unauthorized persons, the weight of their body causes a local increase in pressure inside the polymer film, as a result of which the electrical resistance of the polymer film, in accordance with the above physical effect, drops sharply in areas directly under the soles of the shoes, and remains almost unchanged outside these plots. This leads to a sharp decrease in the resistance (actually, to shorting) of the pairs {x, y} of conductors under the surface of the soles, which is immediately reflected by bright points on the computer screen. This ensures the rapid display of coordinates and trajectories of unauthorized persons inside the protected premises.

The proposed utility model is used to easily and quickly create the specified sensor system. For this purpose, it is proposed to use a roll-up wide (of the order of a meter or more) tape type “adhesive tape”, which is a thin-film base made of polymer plastic compound, which can be used PVC plastic compounds or other film polymers for which the above physical Effect. A non-drying adhesive is applied to the film surface, as well as a system of conductors parallel to the edges of the tape, after which the tape is rolled up.

To manufacture a sensor system, the floor surface in a guarded room with an existing floor covering (for example, in the form of linoleum or parquet) is first completely covered by gluing parallel strips of the specified tape, after which the surface of the resulting coating is secondly fixed by gluing the same tape, but in the perpendicular direction. As a result, a two-layer system is formed, the lower polymer layer of which plays the role of a sensor element, and the upper one acts as a protective layer. After that, the ends of the conductors from one of the edges of each of the two tapes in accordance with the above are displayed on the computer.

As conductors in the system under consideration, ordinary thin metal conductors can be used, as well as any other similar highly conductive formations obtained, for example, using thin foil strips, spraying metal strips, using graphite conductive paint strips, or narrow and thin strips of highly conductive polymers .

In the absence of the need to track the paths of violators to create a warning system about unauthorized access to the protected premises, the design in question can be simplified by preliminary gluing two identical tapes superimposed on each other. In this case, the need to use a computer disappears, since gluing the resulting double tape as a floor covering of parallel strips using the simplest warning system, for example, an audio signal that triggers when any two conductors from the upper and lower layers are shorted, solves the problem. In this case, the conductor system can be replaced by continuous conductive layers, for example, of thin metal foil or wire mesh.

The advantage of using the proposed wide tape type “adhesive tape” to create a sensor system is ease of installation and versatility, i.e. the suitability of use in rooms of arbitrary shape, which avoids the need for factory-made film sensor for each specific room.

Bibliography

1. D.V. Vlasov, L.A. Apresyan, V.I. Krystob, T.V. Vlasova. Investigation of conductivity switching upon action of monoaxial pressure on plasticized PVC films // ArXiv: 1010.6241.

2. D.V. Vlasov, L.A. Apresyan, T.B. Vlasova, V.I. Kryshtob. Nonlinear response and two stable states of electrical conductivity in plasticized transparent polyvinyl chloride films // Letters in ZhTF. 2010. Volume 36. Issue 19. S.100-106.

3. A.N. Lachinov, N.V. Vorobyova. Electronics of thin layers of wide-gap polymers // UFN. 2006.V.17. Issue 12. S.1249-1266.

4. N.S. Yenikolopyan, Yu.A. Berlin, S.N. Beshenko, V.A. Zhorin. Anomalously low electrical resistance of thin films of dielectrics // Letters in JETP. 1981.V. 33. Issue 10. S.508

5. A.N. Lachinov, A.Yu. Zherebov, V.M. Kornpilov. Anomalous electronic instability of polymers at uniaxial pressure // Letters in JETP. 1990.V. 52. IN 2. S.742-745.

6. Kryshtob V.I. Method for production of antistatic polymer materials. U.S. Patent 5.576.383. 11/19/1996.

Claims (1)

A rollable wide tape of type “adhesive tape” consisting of a polymer film made of PVC plastic compound or another flexible polymer with a pronounced effect of switching electrical conductivity under the influence of uniaxial pressure, with electrical conductors and a thin layer of non-drying adhesive adhesive applied to one of its surfaces serving when gluing it with two mutually perpendicular layers to create a system of conductors forming a coordinate {x, y} -grid in such a way that when penetrating the post For unauthorized persons, an additional uniaxial pressure arises under the pressure of the soles of their shoes, causing a local drop in the resistance of the polymer film and shorting of the conductors of the {x, y} network, which, when connecting this system to the simplest computer system, allows you to track the position and trajectories directly on the computer monitor movements of these unauthorized persons.