JP2001256850A - Floor mat sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor mat sensor with uniform sensitivity to detect a load over the entire floor mat sensor capable of properly detecting the load of an object on the floor and a human's load even when the feet of another human are on the mat. SOLUTION: A floor mat sensor is disposed on a floor surface. A plurality of mat-like conductors 2 and other conductors 4 for detecting the load of a human on the mat composing a detecting means. There is an insulating body 3 between the conductors 2 and the other conductors 4 so that the conductors 2 and the other conductors 4 are kept insulated. In addition, a surface insulating body 5 and a bottom insulating body 6 are glued to the surface of the conductors 2 and the bottom of the conductors 4, respectively to form a capacitor. A change in load 7 due to the feet of a human causes the insulating body 3 to be compressed, changed, and then recover. The sensor detects then a change in static capacity due to a change in insulating distance between the plurality of conductors 2 and the other conductors 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for disposing on a floor,
The present invention relates to a floor mat sensor including mat-shaped detecting means for detecting a human body by utilizing a load change caused by a person getting on and off.

[0002]

2. Description of the Related Art In a conventional mat-shaped sensor, for example,
One example is shown in FIG.

[0003] A mat-shaped sensor is known in which a conductive state is turned ON when a person steps on and returns to a non-conductive state OFF when the person steps away.

In this method, a support F made of an insulating rubber sheet is disposed between an upper sheet D formed by attaching a conductive rubber B under an insulating rubber A and a lower sheet E made of metal. The conductive rubber B and the lower sheet E are separated by the support F to be in a non-conductive state, and when a person rides on the upper sheet D, the upper sheet D is deformed and the conductive rubber B is adjacent to the support. In this case, the sheet enters into the lower part from the space G between F and comes into contact with the lower sheet E so as to be in a conductive state.

For example, as a related known example, there is Japanese Patent Application Laid-Open No. Hei 9-17272.

[0006]

As described above, in the mat-shaped sensor shown in FIG. 4, when a person gets on the upper sheet D, the upper sheet D is deformed to be in a conductive state. Was difficult to conduct without stepping directly on the floor.

Further, since the lower sheet E made of conductive rubber B and metal has a planar structure, if any part of the mat-shaped sensor becomes conductive, the other part is stepped on. This cannot be detected.

In other words, in the technology having the structure shown in FIG. 4 and utilizing the conduction of the contacts, it is difficult to react when stepping on a specific place, or an object is placed on a part of the mat so that the contacts become conductive. If this happens, there is a problem that even if another place is stepped on, it cannot be detected.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a plurality of mat-shaped conductors arranged on a floor surface and detecting that a person gets on and off, and another conductor. Constituting a detection means, an insulator is interposed therebetween so as to maintain insulation between the conductor and another conductor, a surface insulator is provided on a surface side of the conductor, and on a bottom side of the conductor. Capacitor structure with laminated bottom insulator
When a change in load due to a person getting on and off is applied, the insulator undergoes a compression change, and a recovery change causes a change in capacitance caused by a change in the insulation distance between the plurality of conductors and another conductor. It was detected.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention comprises a detecting means comprising a plurality of mat-shaped conductors for detecting entry and exit of a person and other conductors, and insulating the conductor from other conductors. According to a capacitor structure in which an insulator is interposed therebetween so as to maintain the surface insulator, a surface insulator is superposed on the surface side of the conductor, and a bottom insulator is laminated on the bottom side of the conductor, Due to a load change when a person gets on and off, the insulator undergoes compressive deformation, and recovery deformation, the insulation distance between the plurality of conductors and other conductors changes, and the resulting change in capacitance causes Detects people getting on and off.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a floor mat sensor according to an embodiment of the present invention.

Reference numeral 1 denotes a floor mat sensor, which comprises the following components.

Reference numerals 2 and 4 denote conductors, which are planar electrodes made of a flexible material having excellent conductivity, such as an aluminum vapor-deposited film.

Reference numeral 3 denotes an insulator sandwiched between the conductor 2 and another conductor 4, and is made of a material such as a silicone rubber sheet which is easily compressed and deformed in the thickness direction and is not easily broken.

Reference numeral 5 denotes a surface insulator which is provided on the surface side of the conductor 2 for the purpose of protecting the surface and electrically insulating the conductor 2. Rubber or the like is used.

Reference numeral 6 denotes a bottom surface insulator, which is provided on the bottom surface side of the conductor 4 for the purpose of protecting the bottom surface and electrical insulation, and is made of EP rubber or the like as the surface insulator 5. .

The conductor 2 to the bottom insulator 6 are each laminated with a double-sided adhesive sheet or the like.

FIG. 3 shows an embodiment in which a change in the capacitance of the floor mat sensor 1 according to the present invention is extracted as an electric signal.

The capacitor 10 schematically shows a change in capacitance of the floor mat sensor 1.

The input terminal 11 and the ground terminal 12 are connected to the conductor 2 and another conductor 4 respectively.

Reference numerals 13 and 14 denote bias resistors, respectively, which determine the operating point of the amplifier 22.

Reference numeral 17 denotes an input resistor,
0 and the negative input terminal 19 of the amplifier 22.

Reference numeral 20 denotes a feedback resistor, which is connected to the output terminal 21 and the minus input terminal 19,
And a bias voltage is applied to the capacitor 10.

Next, the operation of the above configuration will be described.

FIG. 2 shows how the floor mat sensor 1 according to the present invention is stepped on by a person's foot or the like and deformed in the thickness direction under a load 7.

At this time, the portion receiving the load 7 is compressed and deformed, and the insulation distance between the conductor 2 and the other conductor 4 becomes db.
It is smaller than the insulation distance da of the other parts not receiving the load 7.

Therefore, the portion receiving the load 7 has an increased capacitance as compared with the other portions.

That is, in the floor mat sensor 1 as a whole, the capacitance in proportion to the area receiving the load 7 and the insulation distance (da-db) reduced by the load 7 increases. Conversely, when the load 7 disappears, the insulation distance between the conductor 2 and the other conductor 4 at the portion receiving the load 7 is restored to the original insulation distance da. The capacity also returns to the value before the load 7 was applied.

Now, a load 7 is applied to the floor mat sensor 1,
If the capacitance of the floor mat sensor 1 changes, the charge and discharge current 9 is generated in the capacitor 10 because the capacitance of the capacitor 10 has changed.

Since the charge / discharge current 9 flows through the input resistor 17, the voltage at the negative input terminal 19 of the amplifier 22 changes, and the voltage fluctuation generated at the input terminal 11 is changed by the input resistor 17 and the feedback resistor 20. The signal is amplified at a predetermined signal amplification rate and output to the output terminal 21.

[0032]

According to the present invention, in the floor mat sensor, the structure is the same regardless of where the user steps on the mat-shaped sensor.
There is no variation in detection sensitivity.

Further, even if an object is placed somewhere on the floor mat sensor or another person is stepping on the floor mat sensor, if a new load change occurs, the capacitance will change. ,
It can be detected correctly.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram of a floor mat sensor showing one embodiment of the present invention.

FIG. 2 is a main part configuration diagram of an operation when a load is applied to a floor mat sensor according to an embodiment of the present invention.

FIG. 3 is an electric circuit diagram of a floor mat sensor showing one embodiment of the present invention.

FIG. 4 is a configuration diagram of a main part of a floor mat sensor according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor mat sensor 2 Conductor 3 Insulator 4 Conductor 5 Surface insulator 6 Bottom insulator 7 Load

Claims (1)

[Claims] 1. A detecting means comprising a plurality of mat-shaped conductors (2) arranged on a floor surface for detecting that a person gets on and off and another conductor (4); ) And another conductor (4) to keep the insulation (3) between them.
And a capacitor structure in which a surface insulator (5) is laminated on the surface side of the conductor (2) and a bottom insulator (6) is laminated on the bottom side of the conductor (4). When the load (7) changes due to getting on and off, the insulator (3) changes in compression and recovery, and the insulation distance between the plurality of conductors (2) and another conductor (4) changes. A floor mat sensor that detects a change in capacitance caused by the operation.