EP2743387B1 - Stoffprodukt und daraus hergestellter Sensorstoff - Google Patents

Stoffprodukt und daraus hergestellter Sensorstoff Download PDF

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Publication number
EP2743387B1
EP2743387B1 EP12197198.0A EP12197198A EP2743387B1 EP 2743387 B1 EP2743387 B1 EP 2743387B1 EP 12197198 A EP12197198 A EP 12197198A EP 2743387 B1 EP2743387 B1 EP 2743387B1
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EP
European Patent Office
Prior art keywords
fabric
strips
layer
conductive
product
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12197198.0A
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English (en)
French (fr)
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EP2743387A1 (de
Inventor
Marc Torrent Poch
Jordi Planaguma Vila
Carlos Perez Saez
Meritxell Garcia-Milá Mateu
Urbez Santana Roma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fundacio Eurecat
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Fundacio Eurecat
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Publication date
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Priority to ES12197198.0T priority Critical patent/ES2669196T3/es
Priority to EP12197198.0A priority patent/EP2743387B1/de
Publication of EP2743387A1 publication Critical patent/EP2743387A1/de
Application granted granted Critical
Publication of EP2743387B1 publication Critical patent/EP2743387B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/02—Pile fabrics or articles having similar surface features
    • D04B21/04—Pile fabrics or articles having similar surface features characterised by thread material
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/01—Surface features
    • D10B2403/011—Dissimilar front and back faces
    • D10B2403/0114—Dissimilar front and back faces with one or more yarns appearing predominantly on one face, e.g. plated or paralleled yarns
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/021—Lofty fabric with equidistantly spaced front and back plies, e.g. spacer fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0243—Fabric incorporating additional compounds enhancing functional properties
    • D10B2403/02431—Fabric incorporating additional compounds enhancing functional properties with electronic components, e.g. sensors or switches
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/08—Upholstery, mattresses

Definitions

  • the present invention relates to a fabric destined to be used in a fabric sensor, that can be made in a single process and obtained as a single product.
  • the state of the art comprises many fabric products comprising a top layer and a lower layer, and an intermediate nonconductive layer therebetween, such that when pressing the layers towards each other, its electrical properties change at the pressure points, and a sensor is obtained.
  • EP1756538 discloses a textile pressure sensor with a flexible design which can be adapted to different shapes of load and comprising a sandwich construction with electrodes at each side of a central compressible layer.
  • the compressible layer has a reversible effect and is applied onto a flexible base electrode layer and is covered by an insulating layer.
  • the sensor is completed by a pattern of flexible electrodes of selected shapes applied to the insulating layer and with each electrode with a separate connection to a processor.
  • GB2443208 discloses a textile pressure sensing element constructed from electro-conductive yarns as a single sheet of fabric.
  • the elements include multiple compressible junctions, each junction comprising two overlapping electro-conductive yarns separated by a gap.
  • the gap is filled with a resilient compressible material.
  • the sensor may be a capacitive sensor where the gap is filled with a dielectric material. By measuring the capacitance of the overlapping conductors the size of the gap, and thus the force applied to the junction is measured in order to determine pressure.
  • the sensor may be a resistive sensor where the gap is filled with a compressible conductive material whose resistance varies with compression, and resistance is measured to determine applied force.
  • CA2665555 discloses a capacitance pressure mapping system which includes a plurality of sensor cells created by the intersection of electrode columns and rows, and a solid elastomer dielectric separating the electrode columns and rows.
  • the present invention proposes a fabric product comprising a top layer and a bottom layer, the top layer comprising a series of alternate insulating strips and conductive strips, the bottom layer having low conductivity properties, characterised in that it comprises cross-yarns of low conductivity material extending from the bottom layer to the conductive strips of the top layer, and an intermediate layer having low conductivity or insulating properties knitted with the top layer and the bottom layer, the cross yarns extending through said intermediate layer.
  • This fabric can be made in a warp knitting machine, i.e., in a single process, and provides for the basic part of a sensing fabric, when a third conductive layer equal to top layer is added at the bottom of the lower layer.
  • This conductive surface could be the fabric itself, as shown below and claimed in claim 12.
  • the fabric can be a spacer warp knitting too.
  • This intermediate layer ensures a positive relation between pressure and conductivity, such that the sensor made with the fabric is able to measure electrical response in a direct relation with the applied pressure with high dimensional stability.
  • the inventive fabric can have the following optional features, taken alone or in combination:
  • a second object of the invention is a sensing fabric comprising two inventive fabrics as set above, wherein the two fabrics are placed with the lower layers of both fabrics in contact, the strips of the two fabrics being non-parallel, and preferably perpendicularly arranged.
  • Another object of the invention is a seat, mattress or floor provided with the latter sensing fabric.
  • the invention starts from a fabric product 1 comprising a top layer 2 and a lower layer 3, the top layer 2 comprising a series of alternate insulating strips 4 and conductive strips 5, the bottom layer 3 having low conductivity properties.
  • the fabric comprises cross-yarns 6 of low conductivity material extending from the bottom layer 3 to the conductive strips 5 of the top layer 2. This fabric can be made in a single bar Raschel machine.
  • This fabric when arranged on a conductive surface, will behave as a sensor. By establishing a voltage between the conductive surface and the conductive strips and pressing the fabric, the fabric becomes conductive at the pressure points, thus allowing it to be used as a switch or a pressure sensor.
  • the fabric is structured in different layers, each layer with its material and knitting properties to make the fabric change its electrical properties when pressure is applied to it.
  • the top and the bottom layer are conductive and act as electrodes. Between these both conductive layers a certain configuration of yarns with insulating and specific conductivity properties are knitted.
  • the fabric is not pressed, there is no physical contact between the conductive yarns and the yarns of specific conductivity properties, so that conductivity between both electrodes is zero.
  • the fabric is pressed, physical contacts between the conductive and these yarns with specific conductivity start to happen and conductivity paths are created. The more pressure applied, the more physical contacts between these yarns, and the higher is the conductivity (lower the resistance).
  • the fabric comprises a top layer 2 provided with a series of alternate insulating strips 4, conductive strips 5 and heating strips 8, the insulating strips 4 being inserted between the conductive strips 5 and the heating strips 8.
  • the heating function is ensured because conductive yarns increase their temperature when current circulates along them. Specific heating strips with certain conductive yarns are knitted to obtain this function separately from the pressure sensor function. Between both functions - that means, between both strips- insulating strips are knitted to avoid any current circulating between the heating and the sensing yarns.
  • the fabric comprises an intermediate layer 7 having low conductivity properties weaved with the top layer 2 and the lower layer 3, the cross yarns 6 extending through said intermediate layer 7.
  • This intermediate layer also avoids a direct contact between the electrode layers to avoid any short circuit.
  • the inventive fabric comprises a top layer 2 provided with a series of alternate insulating strips 4, conductive strips 5 and heating strips 8, the insulating strips 4 being inserted between the conductive strips 5 and the heating strips 8 and an intermediate layer 7 having low conductivity properties weaved with the top layer 2 and the lower layer 3.
  • Another object of the invention is a sensing fabric comprising two fabrics 1 according to any of the inventive embodiments previously described, wherein the two fabrics are placed with the lower layers of both fabrics in contact, the strips of the two fabrics being non-parallel, and preferably perpendicularly arranged, i.e., in an analogous manner as disclosed in CA2665555 .
  • the sensing fabric can be applied to seats, for example a vehicle seat, a theatre or stadium seat. It can be applied to mattresses or heating floors too.
  • the sensing fabric can be used in keyboards, button boards or joysticks.
  • Figure 4 shows a yarn arrangement that can be carried out with a single bar Raschel machine. Specifically it comprises a multi-filament of bottom layer 3, a cross-yarn with piezoresistive properties 6, a multifilament of intermediate layer 7, a conductive yarn 5, an insulating yarn 4 and a heating yarn 8.
  • Figure 6 shows a yarn arrangement that can be carried out with a double bar Raschel machine, which allows for obtaining a spacer warp knitting fabric, which has to be understood as a fabric with an intermediate layer that provides for a relatively thick fabric.
  • This one comprises two multi-filaments of bottom layer 3a and 3b, a cross-yarn with piezoresistive properties 6, a monofilament of intermediate layer 7, a conductive yarn 5, an insulating yarn 4 and a heating yarn 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Knitting Of Fabric (AREA)
  • Woven Fabrics (AREA)

Claims (14)

  1. Gewebeprodukt (1), das eine obere Schicht (2) und eine untere Schicht (3), wobei die obere Schicht (2) eine Reihe von sich abwechselnden isolierenden Streifen (4) und leitfähigen Streifen (5) aufweist, wobei die untere Schicht (3) Leitfähigkeitseigenschaften aufweist, und eine Zwischenschicht (7) mit isolierenden Eigenschaften aufweist, die mit der oberen Schicht (2) und der unteren Schicht (3) verwebt ist,
    dadurch gekennzeichnet, dass dasselbe Kreuzgarne (6) aus einem leitfähigen Material aufweist, die sich von der unteren Schicht (3) zu den leitfähigen Streifen (5) der oberen Schicht (2) erstrecken, wobei sich die Kreuzgarne (6) durch die Zwischenschicht erstrecken (7).
  2. Gewebeprodukt (1) gemäß Anspruch 1, wobei das Produkt (1) ein Kettengewirk ist.
  3. Gewebeprodukt (1) gemäß Anspruch 1, wobei das Produkt (1) ein Abstandskettengewirk ist.
  4. Gewebeprodukt (1) gemäß einem der vorhergehenden Ansprüche, bei dem die obere Schicht (2) eine Reihe von sich abwechselnden isolierenden Streifen (4), leitfähigen Streifen (5) und Erwärmungsstreifen (8) aufweist, wobei die isolierenden Streifen (4) zwischen die leitfähigen Streifen (5) und die Erwärmungsstreifen (8) eingefügt sind.
  5. Gewebeprodukt (1) gemäß Anspruch 4, bei dem die Erwärmungsstreifen (8) aus Polyester und Acerinox gefertigt sind.
  6. Gewebeprodukt (1) gemäß einem der vorhergehenden Ansprüche, bei dem die isolierenden Streifen (4) aus polymerem Garn gefertigt sind.
  7. Gewebeprodukt (1) gemäß einem der vorhergehenden Ansprüche, bei dem die leitfähigen Streifen (5) aus verkupfertem leitfähigem Material gefertigt sind.
  8. Gewebeprodukt (1) gemäß einem der vorhergehenden Ansprüche, bei dem die Kreuzgarne (6) einen polymeren Kern aufweisen, der mit Kohlenstoffpartikeln beschichtet ist.
  9. Gewebeprodukt (1) gemäß einem der vorhergehenden Ansprüche, bei dem alle Schichten aus Multifilgarnen gefertigt sind.
  10. Gewebeprodukt (1) gemäß Anspruch 1 oder Anspruch 3, bei dem die Zwischenschicht (7) aus Monofilgarnen gefertigt ist.
  11. Erfassungsgewebe, das ein Gewebeprodukt (1) gemäß einem der vorhergehenden Ansprüche aufweist, wobei die untere Schicht (3) mit einer leitfähigen Oberfläche in Kontakt steht.
  12. Erfassungsgewebe, das zwei Gewebeprodukte (1) gemäß einem der Ansprüche 1 bis 10 aufweist, wobei die zwei Gewebe (1) mit den freien Oberflächen der unteren Schicht (3) in Kontakt gebracht sind, wobei die Streifen der zweie Gewebe nicht parallel angeordnet sind.
  13. Sitz, der mit einem Erfassungsgewebe gemäß Anspruch 11 versehen ist.
  14. Matratze, die mit einem Erfassungsgewebe gemäß Anspruch 11 versehen ist.
EP12197198.0A 2012-12-14 2012-12-14 Stoffprodukt und daraus hergestellter Sensorstoff Active EP2743387B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES12197198.0T ES2669196T3 (es) 2012-12-14 2012-12-14 Producto de tejido y tejido de detección fabricado del mismo
EP12197198.0A EP2743387B1 (de) 2012-12-14 2012-12-14 Stoffprodukt und daraus hergestellter Sensorstoff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12197198.0A EP2743387B1 (de) 2012-12-14 2012-12-14 Stoffprodukt und daraus hergestellter Sensorstoff

Publications (2)

Publication Number Publication Date
EP2743387A1 EP2743387A1 (de) 2014-06-18
EP2743387B1 true EP2743387B1 (de) 2018-02-14

Family

ID=47559128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12197198.0A Active EP2743387B1 (de) 2012-12-14 2012-12-14 Stoffprodukt und daraus hergestellter Sensorstoff

Country Status (2)

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EP (1) EP2743387B1 (de)
ES (1) ES2669196T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105386220A (zh) * 2015-10-16 2016-03-09 浙江青松轻纺股份有限公司 一种防污抑菌抗静电超细经编面料及其加工工艺
CN111270393B (zh) * 2020-02-25 2021-06-25 江南大学 智能床垫用纬编双向提花结构柔性传感器设计及织造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1605240A1 (de) 2004-06-09 2005-12-14 ETH Zürich, ETH Transfer Textiler Drucksensor
SE528332C2 (sv) 2004-09-16 2006-10-24 Kongsberg Automotive Ab En värmesits för en fordonsstol
DE102006038612A1 (de) * 2006-08-17 2008-02-28 Müller Textil GmbH Abstandsgewirke mit eingewirkten Leiterfäden
GB2443208A (en) 2006-10-27 2008-04-30 Studio 1 Ventures Ltd Textile pressure sensor
FR2929624A1 (fr) 2008-04-07 2009-10-09 Schonherr Textilmaschb Gmbh Procede de tissage pour realiser une nappe textile chauffante, nappe textile chauffante et metier a tisser pour mettre en oeuvre un tel procede.
DE102008034937A1 (de) * 2008-07-26 2010-02-04 Müller Textil GmbH Abstandsgewirke und Verfahren zu dessen Herstellung
EP2204482A1 (de) 2009-01-06 2010-07-07 MDB Texinov SA Textile Heizstruktur
DE102009013250B3 (de) * 2009-03-14 2010-07-15 Müller Textil GmbH Gewirkeabschnitt, insbesondere zur Verwendung als Heizeinlage, sowie Verfahren zur Herstellung eines Gewirkes
CA2665555A1 (en) 2009-05-06 2010-11-06 Xsensor Technology Corporation Dielectric textured elastomer in a pressure mapping system
US20130075381A1 (en) 2010-03-26 2013-03-28 Iee International Electronics & Engineering S.A. Occupant sensing and heating textile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2743387A1 (de) 2014-06-18
ES2669196T3 (es) 2018-05-24

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