JPS62165178A - Method for detecting intruders into buildings and flooring sheets therefor - Google Patents

Abstract

PURPOSE:To surely detect a person who enters a building by arranging a pressure conductive material which has plural divided electrodes on the reverse surface of a floor surface material. CONSTITUTION:Electrodes 3 and 4 are arranged on the top and reverse surfaces of the pressure conductive material 2 and this material 2 is arranged on the reverse surface of a carpet 1 as the floor surface material. An electric insulating protective material 5 is adhered to the reverse surface of the electrode 4, one electrode 3 is divided to optional size to generate addresses, and the electrodes 3 and a4 are connected to a cable 7 through lead wires 6. When the floor surface material 1 is stepped, the material 2 is pressed to cause resistance variation and current variation due to the resistance variation is detected to detect the person who enters the building and also surely detect his or her position from the address of the electrode 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting intruders in buildings such as houses and buildings, and a flooring sheet used in the method.

[Prior Art and its Problems] Conventionally, methods of detecting intruders in buildings such as houses and buildings on holidays or at night using television cameras, infrared sensors, or optical sensors are known.

However, these methods only detect and cannot track.
Improvement was desired.

[Object of the Invention] The object of the present invention is to provide a method for detecting an intruder into a building, which is capable of not only detecting the intruder but also tracking the intruder. Another object of the present invention is to provide a flooring material suitable for use therein.

[Summary of the Invention] The method for detecting an intruder into a building of the present invention includes disposing a pressurized conductive material on the back side of the floor covering of the building, and at least one of the pressurized conductive materials having a plurality of A lead wire is connected to the electrode, and a signal based on a change in electrical resistance caused by pressing the pressurized conductive material remotely is detected.

In addition, the flooring sheet of the present invention has electric IMs in which at least one side is divided into a plurality of pieces arranged on the front and back surfaces of the pressurized conductive material,
A protective material is provided on one or both sides of the protective material.

In the present invention, a pressurized conductive material normally exhibits a large electrical resistance value, but when subjected to compressive deformation under pressure, the electrical resistance value of that part decreases, and when the pressure is removed, the electrical resistance value increases again. Be sure to return the materials.

Specific examples include pressurized conductive rubber sheets made by dispersing carbon black, carbon fiber, metal particles, metal fibers, etc. in rubber and molded into a sheet, or pressurized conductive rubber sheets that use plastic instead of rubber. Examples include plastic sheets. By the way, metals such as copper, nickel, aluminum, iron, and brass are required as metals for the metal particles and fine metal fibers.

For example, the change in the electrical resistance of such a pressurized conductive material is such that a deposited resistivity of about 106 to 1011 Ω-m without pressurization changes to 10 to 1011 Ω-m when a pressure of about 0.2 to 1 Kgf/cffl is applied.
It decreases to about 104 Ω-m, which is a very large change.

The pressurized conductive material does not need to be a continuous piece, but may be divided into appropriate sizes and disposed intermittently at predetermined intervals.

The electrodes placed on the front and back surfaces of the pressurized conductive material can be made of metals such as aluminum or silver by vapor deposition or sputtering, by pasting metal foils such as aluminum or copper, or by using conductive polymer materials. It is formed by pasting a conductive sheet or applying a liquid conductive polymer material. In this case, the address is formed by dividing at least one electrode into arbitrary sizes,
The location of an intruder can be detected.

The pressurized conductive material, which has electrodes on both sides, can be placed with or without adhesive on the back side of floor covering materials such as tiles and carpets in any desired size, such as in hallways, halls, and indoor spaces. etc. When a person walks on the floor covering, several areas of stress are applied to the pressurized conductive material in the part stepped on, and a change in electrical resistance occurs in the JJ[] piezoconductive material in the relevant part. , causing a change in the current value between the electrodes of the relevant part,
Can sense the presence of people. In this case, since one electrode is divided into multiple parts, the sensing position changes as the person moves, making it possible to detect not only the current position but also the direction of movement.

Furthermore, from the rate of change in electrical resistance of the pressurized conductive material, the surface pressure of the stepped part of the floor surface and the weight of the person stepping on it can be estimated.

[Embodiments of the invention] Embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show an example of laying a flooring sheet according to the present invention, with FIG. 1 being an explanatory cross-sectional view and FIG. 2 being a partially cutaway explanatory plan view.

Reference numeral 1 denotes a carpet as a floor covering material. On the back side of this carpet, electrodes 3.4 are arranged on the front and back sides of a pressurized conductive material 2, and an electrically insulating protective material 5 is applied to the lower surface of the electrode 4. Flooring sheets are provided. One of the electrodes 3 and 4 is divided into arbitrary sizes as shown in FIG.
It is designed to form an address. The electrodes 3 and 4 are connected to a wiring cable 7 via a lead wire 6,
A decrease in the electrical resistance of the pressurized conductive material 2 caused by stepping on the floor covering 1 causes a change in the current value of the distribution cable 7, and based on this, the presence and position of the person is detected.

FIG. 3 schematically shows an example of a detection device. The wiring cable 7 is connected to an input port 8, and a signal corresponding to the electrode (address) where the current has changed is output from the input port 8. Based on this signal, various signal processing is performed in the central processing unit 9. The alarm is displayed on the screen on the display device 10, and an alarm signal is issued from the alarm device 11.

4 to 6 are explanatory diagrams of other embodiments of the flooring sheet used in the present invention, and the same reference numerals as in FIGS. 1 and 2 are given the same reference numerals.

In the embodiment shown in FIGS. 4 and 5, the electrode 3 is divided into two parts in the width direction, and the lead wire 6 from the electrode 3 is taken out in one direction.
Additionally, an electrically insulating protective material 5 must be applied to cover both electrodes 3 and 4.

In the embodiment shown in FIG. 6, the lead wires 6 from the electrode 3 are taken out on both the left and right sides, respectively.

In this way, by dividing the electrode 3 into two in the width direction,
It will be possible to detect people's movements in a more detailed manner.

Note that the floor covering material in the present invention is not limited to carpet, and may be made of fired material, glass, plastic, etc.

[Effects of the Invention] As explained above, the present invention arranges a pressurized conductive material having a plurality of divided electrodes on the back surface of a floor surface covering material, and suppresses the resistance change that occurs when the pressurized conductive material is compressed. This system detects intruders by detecting signals based on , and its location can be reliably known, making it extremely effective for detecting and tracking intruders on holidays and at night.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams of one embodiment of the present invention, FIG. 1 is a cross-sectional explanatory diagram of an example of laying a flooring sheet, and FIG. 2 is a partially cutaway plane of an example of laying a flooring sheet. The explanatory diagram, FIG. 3, is a schematic explanatory diagram of the detection device. FIGS. 4 to 6 are explanatory diagrams of other embodiments of the flooring sheet used in the present invention. 1: Floor covering material, 2 near 10 voltage conductive monthly charge, 3.4: Electrode, 5: Protective material, 6: Lead wire, 7: Wiring cable. Agent Patent Attorney Fujio Sato

Claims (4)

[Claims] (1) A pressurized conductive material is placed on the back side of the floor covering of the building, and an electrode with at least one side divided into multiple parts is placed on the front and back surfaces of the pressurized conductive material, and a lead wire is attached to this electrode. 1. A method for detecting an intruder into a building, characterized in that a signal is detected based on a change in electrical resistance caused by pressing a pressurized conductive material remotely. (2) The method for detecting an intruder into a building according to claim 1, wherein the pressurized conductive material is a pressurized conductive rubber sheet. (3) A flooring material for detecting intruders into buildings, characterized in that electrodes, at least one of which is divided into a plurality of parts, are arranged on the front and back surfaces of a pressurized conductive material, and a protective material is provided on one or both sides of the electrodes. sheet. (4) A flooring sheet for detecting an intruder into a building according to claim 3, wherein the pressurized conductive material is a pressurized conductive rubber sheet.