JP2010203809A - Pressure-sensitive sheet and pressure-sensitive sensor using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive sheet which can be easily produced and enables high resolution pressure detection. <P>SOLUTION: A pressure-sensitive sheet 10 includes: a first conductive cloth 20, a non-conductive cloth 30, and a second conductive cloth 40 laminated in this order. The first conductive cloth 20 has conductivity only in a first direction (x direction) by weaving a plurality of conductive wires 21 extending the first direction and non-conductive wires 22 extending in a second direction (y direction) perpendicular to the first direction. The second conductive cloth 40 has conductivity only in the second direction by weaving a plurality of non-conductive wires 41 extending in the first direction and a plurality of second conductive wires 42 extending in the second direction. A plurality of crossing parts of the conductive wire 21 and the conductive wire 42 through the non-conductive cloth 30 are formed by laminating the first conductive cloth 20, the non-conductive cloth 30, and the second conductive cloth 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pressure-sensitive sensor that detects pressure in a two-dimensional plane, and in particular, a pressure-sensitive sheet in which a non-conductive woven fabric is sandwiched between two conductive woven fabrics woven with conductive strands, and this The present invention relates to a pressure-sensitive sensor that detects pressure by a change in capacitance between conductive woven fabrics of a pressure-sensitive sheet.

  Conventionally, as a pressure-sensitive sensor, there has been a sensor that detects pressure by measuring a change in resistance value or a change in capacitance of a pressure-sensitive sheet when the pressure-sensitive sheet is pressed.

  For example, in Patent Document 1, as a technique for measuring pressure distribution and pressure on a non-uniform surface such as a concavo-convex shape, a load is applied to the intersection of a conductive yarn provided on an upper cloth and a conductive yarn provided on a lower cloth. There is disclosed a pressure-sensitive sheet in which pressure-sensitive resistors whose resistance values change are arranged and these two cloths are overlapped so that a change in resistance value due to a load can be measured.

Further, in Patent Document 2, a plurality of conductive yarns are arranged so as to be orthogonal to each other on the upper surface portion and the lower surface portion of a two-layer structure, and when the fiber structure is pressed, the upper surface portion is electrically conductive. There is disclosed a pressure-sensitive sheet in which a yarn and a lower surface conductive yarn are in contact with each other and a change in electric resistance can be detected.
In Patent Document 3, warp yarns and weft yarns in which a conductor layer is covered with a dielectric layer are knitted, and it is possible to detect a change in capacitance between the warp yarns and the weft yarn when contact pressure is applied to the knitted fabric. A pressure sensitive sheet is disclosed.

JP 2004-132765 A JP 2006-284276 A JP 2008-170425 A

  However, in the techniques described in Patent Document 1 and Patent Document 2, pressure is detected by a change in electric resistance value, so that the resolution of pressure is low and it is difficult to detect pressure with high accuracy. was there. In order to increase the resolution of the pressure-sensitive sheet of Patent Document 1, it is necessary to increase the number of pressure-sensitive resistors, which complicates the structure of the pressure-sensitive sheet, leading to an increase in the cost for manufacturing the pressure-sensitive sheet. It was.

In the technique described in Patent Document 3, since the pressure is detected based on the change in capacitance, it is possible to increase the pressure detection resolution as compared with the case based on the change in resistance value. However, this technique requires warp and weft of pressure-sensitive wire material in which a conductor layer and a dielectric layer are formed on the inner and outer peripheries of a cylindrical elastic body in a single sheet. This changes the capacitance. For this reason, there is a problem that the distance between the warp and the weft is insufficient when pressed and the resolution of pressure detection is insufficient. In addition, since it is necessary to manufacture a pressure-sensitive sheet using a thread in which a conductive layer is covered with a dielectric layer, the structure of the thread is complicated, leading to an increase in cost for manufacturing the pressure-sensitive sheet.
Furthermore, the technique described in Patent Document 3 has a problem that an error or damage due to repeated deformation of the conductive wire is a concern.

  The present invention has been made to solve such a conventional problem, and it is an object of the present invention to provide a pressure-sensitive sheet that can be easily manufactured and can detect pressure with high resolution. is there.

  The pressure-sensitive sheet of the present invention is a pressure-sensitive sheet in which a first conductive woven fabric, a non-conductive sheet, and a second conductive woven fabric are stacked in this order, and the first conductive woven fabric includes: By weaving a plurality of conductive strands extending in the first direction and non-conductive fibers extending in the second direction intersecting the first direction, the second conductive material has conductivity only in the first direction, and the second The conductive woven fabric has conductivity only in the second direction by weaving a plurality of non-conductive fibers extending in the first direction and a plurality of conductive strands extending in the second direction, By overlapping the first conductive woven fabric, the non-conductive sheet, and the second conductive woven fabric, the conductive strands extending in the first direction through the non-conductive sheet and the second direction A plurality of intersecting portions of the conductive wires extending are formed.

  According to the present invention, a pressure-sensitive sheet can be configured simply by overlapping two woven fabrics that are woven with conductive wires and non-conductive fibers via a non-conductive sheet. There is an effect that a sheet can be produced.

In addition, by adopting a three-layer structure in which two conductive woven fabrics are stacked via a non-conductive sheet, the distance between the two conductive woven fabrics can be changed sufficiently according to the pressure. As a result, the capacitance of the capacitor constituted by the two conductive woven fabrics can be sufficiently changed, and there is an effect that pressure detection with high resolution becomes possible.
According to the present invention, there is an effect that it is possible to make it unnecessary to coat the conductive wire. Furthermore, according to the present invention, there is an effect that the sensitivity (resolution) as a pressure-sensitive sensor can be adjusted by arbitrarily selecting the thickness, hardness, and structure of the non-conductive sheet.

It is a model perspective view explaining the structure of the pressure sensor of embodiment of this invention. It is a schematic diagram explaining the structure of the pressure sensitive sheet 10 in the pressure sensitive sensor 100 of FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. However, the present invention is not limited thereto, and various modifications can be made without departing from the gist of the present invention.

  FIG. 1 is a schematic perspective view illustrating the configuration of a pressure sensor according to an embodiment of the present invention. The pressure-sensitive sensor 100 according to this embodiment includes a pressure-sensitive sheet 10 and a capacitance measuring unit 60. The pressure-sensitive sheet 10 is a woven fabric having a three-layer structure in which a first conductive woven fabric 20, a non-conductive woven fabric (non-conductive sheet) 30, and a second conductive woven fabric 40 are stacked in this order. However, in FIG. 1, the first conductive woven fabric 20, the non-conductive woven fabric 30, and the second conductive woven fabric 40 are drawn as exploded perspective views for easy understanding of the three-layer structure.

  FIG. 2 is a schematic diagram illustrating the configuration of the pressure-sensitive sheet 10 in the pressure-sensitive sensor 100 of FIG. 2, (a) is a schematic plan view of the first conductive woven fabric 20, (b) is a schematic plan view of the non-conductive woven fabric 30, and (c) is a schematic plan view of the second conductive woven fabric 40. FIG. 4D is a schematic cross-sectional view of the pressure-sensitive sheet 10.

[Pressure-sensitive sheet 10]
As described above, the pressure-sensitive sheet 10 includes the first conductive woven fabric 20, the non-conductive woven fabric 30, and the second conductive woven fabric 40, which are sequentially stacked in the z direction in FIGS. Is a three-layered woven fabric constructed. That is, in the pressure-sensitive sheet 10, non-conductive fibers are woven between the first conductive woven fabric 20 and the second conductive woven fabric 40, each of which is formed by woven conductive wires and non-conductive fibers. The non-conductive woven fabric 30 thus formed is sandwiched.

[First conductive woven fabric 20]
As shown in FIG. 2A, the first conductive woven fabric 20 uses a flat conductive wire 21 as a thread extending in the first direction (x direction in the drawing), and is orthogonal to the first direction. Using flat non-conductive fibers 22 as yarns extending in the second direction (y direction in the figure), a plurality of conductive strands 21 extending in the first direction and a plurality of non-conductive fibers extending in the second direction are used. This is a woven fabric in which the conductive fibers 22 are woven by plain weaving. Accordingly, the first conductive woven fabric 20 is a woven fabric having conductivity in only one direction along the conductive wires 21 in only the first direction.

[Non-conductive woven fabric 30]
As shown in FIG. 2B, the non-conductive woven fabric (non-conductive sheet) 30 uses flat non-conductive fibers 31 as a thread extending in the first direction (x direction in the drawing). A flat non-conductive fiber 32 is used as a thread extending in an orthogonal second direction (y direction in the figure), and a plurality of non-conductive fibers 31 and a plurality of non-conductive fibers 32 are woven by plain weaving. Woven fabric. Therefore, the non-conductive woven fabric 30 is an insulating fabric that does not conduct in the first direction or the second direction orthogonal thereto. In the present invention, any sheet made of a non-conductive elastic member can be used in place of the non-conductive woven fabric 30. The non-conductive sheet in this case is interposed between the conductive strand 21 of the first conductive woven fabric 20 and the conductive strand 42 of the second conductive woven fabric 40 described later, and acts on these. It has a thickness and an elastic force that can sufficiently change the distance between the crossing portions of the conductive wire 21 and the conductive wire 42 according to the pressing force to secure a change amount for causing a capacitance change. Is preferred.

[Second conductive woven fabric 40]
As shown in FIG. 2C, the second conductive woven fabric 40 uses flat non-conductive fibers 41 as yarns extending in the first direction (x direction in the drawing), and the second direction perpendicular thereto. Using flat conductive strands 42 as yarns extending in the y direction (in the drawing), a plurality of non-conductive fibers 41 extending in the first direction and a plurality of conductive strands extending in the second direction. 42 is a fabric woven by plain weaving. Accordingly, the second conductive woven fabric 40 is a woven fabric having conductivity in one direction only along the second direction along each conductive wire 42.

  In the pressure sensitive sheet 10 of the present embodiment, the first direction and the second direction are orthogonal to each other. However, in the pressure sensitive sheet of the present invention, the first direction and the second direction are not orthogonal to each other. Both can be configured to intersect. Further, as the first conductive woven fabric 20, the non-conductive woven fabric 30, and the second conductive woven fabric 40, it is also possible to use a woven fabric woven by satin weave or the like in addition to the plain weave. In the present embodiment, the pressure-sensitive sheet 10 is composed of three woven fabrics. However, the pressure-sensitive sheet of the present invention can be obtained by weaving one woven fabric into a three-layer structure with a woven structure or structure. It is also possible to configure.

[Conductive strands 21, 42]
As the conductive strand 21 of the first conductive woven fabric 20 and the conductive strand 42 of the second conductive woven fabric 40, conductive fibers or conductive wires are used. As said conductive fiber, the metal fiber which consists of general Cu, Fe, Al, and these alloys is used, for example. Furthermore, as the conductive fiber, an organic fiber is used in which a synthetic fiber such as polyester is subjected to a treatment such as dispersing or impregnating conductive particles such as metal particles. In addition to the metal wires such as stainless steel, Cu, and Al, carbon wires are used as the conductive wires.

[Non-conductive fibers 22, 31, 32, 41]
Examples of the nonconductive fibers 22 of the first conductive woven fabric 20, the nonconductive fibers 31 and 32 of the nonconductive woven fabric 30, and the nonconductive fibers 41 of the second conductive woven fabric 40 include cotton and polyester. Common fibers such as fluorinated resin fibers, polyurethane fibers, and ceramic fibers are used.

  In this way, the pressure-sensitive sheet 10 can be produced by stacking three woven fabrics in which conductive strands and non-conductive fibers or non-conductive fibers are simply woven together. Therefore, the pressure-sensitive sheet 10 is a pressure-sensitive sheet that can be produced easily and inexpensively.

  As described above, the pressure-sensitive sheet 10 having the three-layer woven fabric structure in which the non-conductive woven fabric 30 is sandwiched between the first conductive woven fabric 20 and the second conductive woven fabric 40 includes the conductive strand 21 and the pressure-sensitive sheet 10. All the intersecting portions of the conductive wires 42 constitute a capacitor. That is, when a voltage is applied between the plurality of conductive strands 21 woven into the first conductive woven fabric 20 and the plurality of conductive strands 42 woven into the second conductive woven fabric 40, The conductive strand 21 of the first conductive fabric 20 serves as one electrode of the capacitor, and the conductive strand 42 of the second conductive fabric 40 serves as the other electrode of the capacitor. The non-conductive woven fabric 30 sandwiched between the first conductive woven fabric 20 and the second conductive woven fabric 40 serves as a dielectric layer mainly provided between the electrodes of the capacitor as an insulating layer. Fulfill.

  The capacitance of the capacitor is proportional to the electrode area and inversely proportional to the distance between the electrodes. For this reason, when using, for example, a metal fiber or a metal wire as the conductive strand 21 and / or the conductive strand 42, the surface thereof is more uneven than a flat fiber or round wire. By using a deformed fiber or a deformed wire, the capacitance can be increased.

  The first conductive woven fabric 20 and the second conductive woven fabric 40 are arranged through the non-conductive woven fabric 30 so that their conduction directions are orthogonal to each other. That is, the first conductive woven fabric 20 conducts in the first direction, but does not conduct in the second direction orthogonal thereto. Conversely, the second conductive woven fabric 40 does not conduct in the first direction, but does conduct in the second direction orthogonal thereto. Therefore, the lead-out wiring 71 and the first connector 70 necessary for connecting to the plurality of conductive strands 21 woven in the first conductive woven fabric 20 are connected in the first direction ( It is provided at one end in the x direction in the figure. In addition, the lead-out wiring 81 and the second connector 80 connected to the plurality of conductive strands 42 woven into the second conductive woven fabric 40 are arranged in the second direction of the second conductive woven fabric 40 (y in the figure). Direction).

  In the pressure-sensitive sheet 10 made of this three-layer woven fabric, either or both of the first conductive woven fabric 20 and the second conductive woven fabric 40 are oriented in a direction perpendicular to the woven fabric surface (FIGS. 1 and 2). When the pressure is applied by pressing from the z direction in the middle, the distance between the conductive wire 21 and the conductive wire 42 becomes narrow at the intersection of the conductive wire 21 and the conductive wire 42 that opposes the pressed portion. Therefore, the electrostatic capacitance between the conductive wire 21 and the conductive wire 42 at each intersection increases. That is, since the distance between the electrodes of the capacitor becomes narrow in the pressure portion, the capacitance of the capacitor increases. And the change in pressure in the pressurizing part can be detected by measuring the change in capacitance at each intersection. Note that, when a tension is applied in a direction perpendicular to the woven fabric surface, the distance between the electrodes of the capacitor is increased, so that the capacitance of the capacitor is reduced.

  Since the pressure-sensitive sheet 10 has a three-layer structure in which a non-conductive woven fabric is sandwiched between two conductive woven fabrics, the three-layered woven fabric is large depending on the magnitude of the pressing force. It can be elastically deformed to greatly change the distance between the electrodes of the capacitor. Thereby, the electrostatic capacitance of the capacitor can be greatly changed. Therefore, the resolution of pressure detection can be increased and highly sensitive pressure detection is possible.

[Capacitance measuring unit 60]
The capacitance measuring unit 60 includes a first connector 70, a second connector 80, and an LCR meter (capacitance measuring device) 90. The capacitance measuring unit 60 measures the capacitance of a capacitor configured with the conductive wire 21 and the conductive wire 42 as electrodes. The pressure applied to the pressure-sensitive sheet 10 can be detected by the change in capacitance measured by the capacitance measuring unit 60.

[First connector 70]
The first connector 70 is provided on one end portion 20a side in the first direction (x direction in the drawing) which is the conduction direction of the first conductive woven fabric 20. The first connector 70 is provided to connect the plurality of conductive strands 21 woven into the first conductive woven fabric 20 to the LCR meter 90 by the lead wiring 71 and the wiring 72. At the end portion 20 a of the first conductive woven fabric 20, a plurality of lead wires 71 respectively drawn from the plurality of conductive strands 21 are bundled and connected to one terminal of the first connector 70. Yes. The other terminal of the first connector 70 is connected to the first terminal 91 of the LCR meter 90 by a wiring 72.

[Second connector 80]
The second connector 80 is provided on one end portion 40a side in the second direction (y direction in the drawing) which is the conduction direction of the second conductive woven fabric 40. The second connector 80 is provided to connect the plurality of conductive strands 42 woven into the second conductive woven fabric 40 to the LCR meter 90 by the lead wiring 81 and the wiring 82. At the end portion 40 a of the second conductive woven fabric 40, the plurality of lead wires 81 drawn from the plurality of conductive wires 42 are bundled and connected to one terminal of the second connector 80. Yes. The other terminal of the second connector 80 is connected to the second terminal 92 of the LCR meter 90 by a wiring 82.

[LCR meter (capacity measuring instrument) 90]
The LCR meter (capacitance measuring device) 90 applies an AC voltage between the first conductive woven fabric 20 and the second conductive woven fabric 40, and an alternating current flows between these conductive woven fabrics when the AC voltage is applied. This is a device that detects current and measures the capacitance between the conductive fabrics based on the frequency and voltage value of the applied AC voltage and the phase and current value of the detected AC current.

  When pressure is applied to the pressure-sensitive sheet 10, between the electrodes of the conductive wire 21 and the conductive wire 42 in the portion where the capacitor pressure is applied by the first conductive woven fabric 20 and the second conductive woven fabric 40. Since the distance is narrowed, the capacitance measured by the LCR meter 90 increases. Therefore, the pressure applied to the pressure sensitive sheet 10 can be detected by the change in the capacitance measured by the LCR meter 90.

  As described above, according to the embodiment of the present invention, the first conductive woven fabric 20 and the second conductive woven fabric 40 that are simply woven with conductive wires and nonconductive fibers, and nonconductive fibers are bonded together. Since the pressure-sensitive sheet 10 can be constructed simply by superimposing three woven fabrics of the non-conductive woven fabric 30 woven together, a pressure-sensitive sheet can be produced easily and inexpensively.

  In addition, since the three-layer structure in which the first conductive woven fabric 20 and the second conductive woven fabric 40 are overlapped with each other through the non-conductive woven fabric 30, two conductive sheets are formed according to the magnitude of the pressing force. The distance between the conductive woven fabrics can be changed sufficiently, and the capacitance of the capacitor composed of two conductive woven fabrics can be changed sufficiently, enabling pressure detection with high resolution. It becomes.

  In addition, by arranging a plurality of pressure sensitive sheets 10 and measuring the change in capacitance of each pressure sensitive sheet 10, it is possible to detect not only the pressure but also the pressurized region or position. A pressure position sensor can be realized.

  Further, in the pressure-sensitive sheet 10, a pressure-sensitive position sensor that can also detect a pressurized region or position can be realized by dividing a region to which an AC voltage is applied into a plurality of regions. In this case, at the boundary of the voltage application region where the first conductive woven fabric 20 and the second conductive woven fabric 40 are arranged in a divided manner, the conductive strands 21 and the second conductive properties of the first conductive woven fabric 20 are provided. By making the conductive strands 42 of the woven fabric 40 non-conductive fibers, etc., the conductive strands 21 in different voltage application regions and the conductive strands 42 in different voltage application regions do not contact each other. It is necessary to be separated.

The conductive wire 21 is made of a stainless steel wire having a flat surface with a diameter of 50 μm, and the non-conductive fiber 22 is made of polyester fiber (manufactured by Teijin Fibers Ltd .: Superextor “registered trademark”). A woven fabric 20 was produced.
In addition, a non-conductive woven fabric 30 was produced by using the same polyester fiber as the above for the non-conductive fibers 31 and 32, respectively. Moreover, the 2nd electroconductive woven fabric 40 was produced using the same polyester fiber as the above as the nonelectroconductive fiber 41, and using the 50 micrometer diameter stainless steel wire as the electroconductive strand 42. As shown in FIG.
In addition, although the fiber made from a fluororesin can also be used as the nonelectroconductive fiber 22, 31, 32, 41, the above-mentioned polyester fiber was used in the present Example.
The size of the first conductive woven fabric 20m and the size of the second conductive woven fabric 40 were both 50 mm (vertical) × 50 mm (horizontal).

  Then, the first conductive woven fabric 20, the non-conductive woven fabric 30, and the second conductive woven fabric 40 were overlapped to produce the pressure-sensitive sheet 10. Further, the first conductive woven fabric 20 is connected to the LCR meter 90 by the first connector 70, and the second conductive woven fabric 40 is connected to the LCR meter 90 by the second connector 80 to configure the pressure sensitive sensor 100. . As the LCR meter 90, an NF circuit design block ZM2353 was used.

  In the pressure-sensitive sensor 100 according to the first embodiment configured as described above, an AC voltage of 1 V to 450 Hz is applied between the first conductive woven fabric 20 and the second conductive woven fabric 40 by the LCR meter 90, and the pressure sensitive The capacitance of the capacitor by the sheet 10 was measured. The electrostatic capacity when no pressure was applied to the pressure-sensitive sheet 10 was 48 pF, but when the first conductive woven fabric 20 was pushed with a finger from above, the electrostatic capacity increased to 66 pF.

  A 50 μm diameter stainless steel wire having a plurality of convex portions formed on the surface with a height of 1 μm and a pitch of 1 μm is used as the conductive strand 21, and a polyester fiber (manufactured by Teijin Fibers Ltd.) as the nonconductive fiber 22. The first conductive woven fabric 20 was manufactured using Superexter “registered trademark”). In addition, a non-conductive woven fabric 30 was produced using polyester fibers (manufactured by Teijin Fibers Ltd .: Superexter “registered trademark”) for the non-conductive fibers 31 and 32, respectively. Further, a plurality of convex portions formed of polyester fibers (manufactured by Teijin Fibers Ltd .: Superextor “registered trademark”) as the non-conductive fibers 41 and having a height of 1 μm and a pitch of 1 μm as the conductive strands 42. A second conductive woven fabric 40 was produced using a stainless steel wire having a diameter of 50 μm and having irregularities made of

  Then, the first conductive woven fabric 20, the non-conductive woven fabric 30, and the second conductive woven fabric 40 were overlapped to produce the pressure-sensitive sheet 10. That is, in Example 2, in the pressure-sensitive sheet of Example 1 described above, the conductive strand 21 of the first conductive woven fabric 20 and the conductive strand 42 of the second conductive woven fabric 40 have a flat surface. A pressure-sensitive sheet was prepared by changing from a stainless steel wire to a stainless steel wire having the same diameter and having an uneven surface.

  Further, as in the first embodiment, the first conductive fabric 20 is connected to the LCR meter 90 by the first connector 70, and the second conductive fabric 40 is connected to the LCR meter 90 by the second connector 80. The pressure sensor 100 was configured.

  In the pressure-sensitive sensor 100 of Example 2 configured as described above, an AC voltage of 1 V to 450 Hz is applied between the first conductive woven fabric 20 and the second conductive woven fabric 40 by the LCR meter 90, and the pressure sensitive sensor The capacitance of the capacitor by the sheet 10 was measured. The capacitance when pressure was not applied to the pressure-sensitive sheet 10 was 55 pF, but when the first conductive woven fabric 20 was pushed with a finger from above, the capacitance increased to 72 pF.

  DESCRIPTION OF SYMBOLS 10 ... Pressure sensitive sheet, 20 ... 1st electroconductive woven fabric, 21 ... Electroconductive strand, 22 ... Nonelectroconductive fiber, 30 ... Nonelectroconductive woven fabric (nonelectroconductive sheet), 40 ... 2nd electroconductive weave Cloth, 41 ... Non-conductive fiber, 42 ... Conductive strand, 60 ... Capacitance measuring unit, 100 ... Pressure sensor.

Claims (5)

A pressure-sensitive sheet in which a first conductive woven fabric, a non-conductive sheet, and a second conductive woven fabric are stacked in this order,
The first conductive woven fabric is woven only in the first direction by weaving a plurality of conductive strands extending in the first direction and non-conductive fibers extending in the second direction intersecting the first direction. Have conductivity,
The second conductive woven fabric is conductive only in the second direction by weaving a plurality of nonconductive fibers extending in the first direction and a plurality of conductive strands extending in the second direction. Have
By overlapping the first conductive woven fabric, the non-conductive sheet, and the second conductive woven fabric, the conductive strands extending in the first direction through the non-conductive sheet and the second direction A pressure-sensitive sheet comprising a plurality of intersecting portions of the conductive wires extending.   The pressure-sensitive sheet according to claim 1, wherein the non-conductive sheet is a non-conductive woven fabric.   2. The conductive strands extending in the first direction and the conductive strands extending in the second direction are arranged in a state orthogonal to the plan view with the non-conductive sheet interposed therebetween. Or the pressure sensitive sheet of 2.   The strand which has an unevenness | corrugation in the surface was used as a conductive strand of a said 1st conductive woven fabric and / or a said 2nd conductive woven fabric, The Claim 1 characterized by the above-mentioned. Pressure sensitive sheet. The pressure-sensitive sheet according to any one of claims 1 to 4,
A pressure-sensitive sensor, comprising: a capacitance measuring unit that measures a capacitance of a capacitor configured using the first conductive woven fabric and the second conductive woven fabric as electrodes.

Images