JPS62107398A - Detection of invader into building and floor material sheet therefor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the ability to detect intruders to buildings such as houses and buildings, and to flooring sheets used therefor.

[Prior art and its problems] Conventionally, methods of detecting intruders in buildings such as houses and buildings on holidays or at night have been used using television cameras, infrared sensors, or optical sensors. The method only detects and cannot track, and improvements have been desired.

[Object of the Invention] An object of the present invention is to provide a detection method that is capable of not only detection but also position detection.

[Summary of the Invention] In the present invention, a piezoelectric sheet is arranged on the back side of the surface covering material of the floor of a building, and at least one of the electrodes provided on the front and back sides of the piezoelectric sheet is divided into a plurality of parts, and the electrode lead wires are connected. By remotely detecting the voltage generated when the piezoelectric sheet is compressed, it is possible to detect where the floor covering has been stepped on.

In this invention, piezoelectric sheets include polynylidene fluoride, polyvinyl fluoride, copolymers of vinylidene fluoride and ethylene trifluoride, copolymers of dianovinylidene and vinyl acetate, chloroprene rubber, silicone rubber, fluorine rubber, etc. Materials obtained by stretching or rolling a single polymeric material such as rubber, or a composite containing dispersed inorganic piezoelectric ceramic powder such as lead zirconate titanate in a polymeric material containing other materials are used. This piezoelectric sheet is of any size and is placed on the back side of a floor covering material such as a tile or carpet with or without an adhesive.

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

In FIG. 1, reference numeral 2 denotes a piezoelectric sheet made of vinylidene fluoride, for example, which is adhesively bonded to the back surface of a carpet 1 as a floor covering material.
is laid, and an electrically insulating protective sheet 5 is further adhered to the electrode 4 side.

The electrodes 3.4 serve as pick-up electrodes that extract the voltage generated between the front and back surfaces of the piezoelectric sheet 2 by stepping on the carpet 1, and each end has a detection device @ (not shown) including a discharge electrode. A lead wire 6 from a wiring cable 7 for leading to is connected.

These electrodes 3 and 4 are made of metal such as aluminum or silver by vapor deposition or sputtering, or made of aluminum.

It is formed by a method such as pasting a metal foil such as copper or a conductive sheet of a conductive polymer material, or applying a liquid conductive polymer material.

In this case, as shown in FIG. 2, at least one electrode 3 is finely divided in one direction to form an address, but it is also divided into two in the other direction.

A carpet with such a structure can be installed under B or in a passageway in the room, and if the wiring cable 7 is connected to a detection device, the piezoelectric sheet will be detected in the area stepped on when a person walks on the carpet. Mechanical stress is applied to the electrode 3.2, a potential is generated on the front and back sides of the piezoelectric sheet in the relevant part, and the electrode 3.2 in the relevant part is applied.
A current flows between electrodes 4 and 4, allowing the presence of a person to be detected, but since one electrode 3 is divided into multiple parts, the sensing position changes as the person moves, making it difficult to detect not only the current position but also the direction of movement. can.

If the electricity 3 is also divided in the width direction as in the illustrated example, it is possible to detect whether the person is moving to the right or left.

In the previous example, the piezoelectric sheet 2 is laid in a state that it is bonded to the carpet 1, but the piezoelectric sheets 2 may be arranged on the back surface of the carpet 1 by sequentially laying different piezoelectric sheets 2. In that case, the piezoelectric sheet 2 and the carpet 1 may or may not be bound together with an adhesive or the like.

Of course, the carpet 1 can be used with other floor coverings, such as a fired product,
The floor material itself may be made of glass, fiber, plastic, etc.

Further, the piezoelectric sheet placed on the back surface of the floor covering does not need to be a single piece, and may be divided into appropriate sizes and placed intermittently.

5 [Effects of the Invention] As is clear from the above description, the present invention is a method in which a piezoelectric sheet having a plurality of divided electrodes is arranged on the back surface of a floor covering material, and therefore lead wires are connected to the electrodes. By remotely detecting the voltage generated when the piezoelectric sheet is compressed, its location can be reliably known, making it extremely effective for detecting and tracking intruders on holidays and at night.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a carpet used in an embodiment of the method according to the present invention, and FIG. 2 is a plan view showing how the electrodes are divided in the carpet. 1... Carpet as a floor covering. 2...Piezoelectric sheet. 3 and 4...electrodes. 5...Protection sheet. 6... Lead wire. 7...Wiring cable. Agent Patent Attorney Fi Fujio Fuji 1 1 Diagram O 2 Diagram procedure amendment [, 1, 14 Showa 1989 Patent Application No. 247635
No. 2 Title of Invention Method for detecting intruders into a building and flooring sheet therefor 1-
3 Relationship with the old case to be amended Special n Applicant Office 2-1-2 Marunouchi, Chiyoda-ku, Tokyo @ Name (512> Hitachi Cable 4 Shu Shikikai 2 Shiro 1, 't・Aθ-゛5, Details subject to amendment "Claims" and "Detailed Description of the Invention"
column. 6. Contents of amendment (1) The scope of claims is as shown in the attached sheet. (2) Add ``to each'' between ``1 electrode'' and ``lead wire'' at the beginning of line 13 on page 2 of the specification. (3) Add ``to lay'' on page 4, line 12 of the same specification. Add “Lead wire 6 converged” between “Wiring cable”. (4) “To that electrode” and “S” at the end of page 5, line 19 of the same page.
Add 1 ``each'' between them. 7. Attached documents: 1 or more sheets <Attachment> Claims (1) A piezoelectric sheet is arranged on the surface of the floor covering of a building, and at least one of the front and back surfaces of the piezoelectric sheet is divided into a plurality of pieces. Arrange the tongue-shaped electrodes and apply J/17 to these electrodes.
Connect the lead wires 1. A method for detecting an intruder into a building characterized by ζ, which detects the voltage generated when a piezoelectric sheet is pressed remotely and detects the location where the floor covering is stepped on as an address. (2) A piezoelectric sheet is glued to the back side of the floor covering,
A flooring sheet for detecting an intruder into a building, characterized in that at least one of the electrodes provided on the front and back surfaces of the piezoelectric sheet is divided into a plurality of parts to form an address.

Claims (2)

[Claims] (1) A piezoelectric sheet is placed on the surface of the floor covering of a building, and electrodes, at least one of which is divided into a plurality of parts, are placed on the front and back surfaces of the piezoelectric sheet, and a lead wire is connected to this electrode. A method for detecting an intruder into a building, the method comprising detecting the voltage generated when a piezoelectric sheet is compressed. (2) A piezoelectric sheet is adhered to the surface of the floor covering,
A flooring sheet for detecting an intruder into a building, characterized in that at least one of the electrodes provided on the front and back surfaces of the piezoelectric sheet is divided into a plurality of parts.