EP1756538A1 - Capteur de pression capacitif textile - Google Patents

Capteur de pression capacitif textile

Info

Publication number
EP1756538A1
EP1756538A1 EP05749161A EP05749161A EP1756538A1 EP 1756538 A1 EP1756538 A1 EP 1756538A1 EP 05749161 A EP05749161 A EP 05749161A EP 05749161 A EP05749161 A EP 05749161A EP 1756538 A1 EP1756538 A1 EP 1756538A1
Authority
EP
European Patent Office
Prior art keywords
pressure sensor
electrode
textile
sensor
pressure
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.)
Withdrawn
Application number
EP05749161A
Other languages
German (de)
English (en)
Inventor
Tünde Kirstein
Jan Meyer
Gerhard Tröster
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.)
Eth Zuerich Eth Transfer
Original Assignee
Eth Zuerich Eth Transfer
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eth Zuerich Eth Transfer filed Critical Eth Zuerich Eth Transfer
Priority to EP05749161A priority Critical patent/EP1756538A1/fr
Publication of EP1756538A1 publication Critical patent/EP1756538A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
    • G01L1/146—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors for measuring force distributions, e.g. using force arrays

Definitions

  • the present invention relates to a textile capacitive pressure sensor according to the preamble of claim 1.
  • the field of textile pressure sensors covers a wide range of applications. Especially for bedridden or disabled people, it is desirable to have a reusable pressure sensor fabric for anti-decubitus clothing. The occurrence of such pressure points can thus be recognized in good time.
  • a grid-like textile pressure sensor is disclosed in EP 1 211 633 A1 [1]. This is formed from an elastic dielectric layer and a plurality of electrode strips which are orthogonal to one another and in this way form a grid of columns and rows. The capacitance at the crossing points is measured by sequential scanning of the columns and rows by means of an electrical signal. The measured capacitance is dependent on the respective load due to the elastic dielectric, i.e. from the respective pressure. In this way, the pressure distribution can be mapped to an area such as the aforementioned grid.
  • a disadvantage of this textile pressure sensor is a limitation to essentially rectangular shapes and a relatively high procedural effort for measuring the respective capacities.
  • the pressure sensors known here from the prior art are not suitable for measuring pressures on uneven surfaces such as, for example, on body parts of a person.
  • DE 10 2004 025 237 AI discloses a textile pressure and tension sensor in which electrically conductive threads are linked to form a network. This sensor is only suitable for the measurement of a train parallel to the flat network and less for the measurement of a flat pressure on this network itself.
  • the present invention is therefore based on the object of specifying a textile capacitive pressure sensor, the shape of the sensor surface of which can be freely adapted and adapted to the respective application and which enables the respective capacitances to be measured in a simple manner.
  • the present invention is a purely textile pressure sensor with which the pressure distribution on an arbitrarily structured surface can be measured.
  • a sensor textile which is constructed from a plurality of textile capacitors
  • the capacitance changes Sensors or electrodes depending on the pressure.
  • the shape of the individual flat capacitors can be chosen freely. This also allows a free choice of the shape of the entirety of all individual flat capacitors in a simple manner. As a result of the fact that the individual flat capacitors each have their own connecting line, the capacitances of the individual capacitors can be measured in parallel and the measurement speed can thereby be increased significantly.
  • Measuring electronics connected outside the textile pressure sensor according to the invention measures the capacitance of the individual capacitors or electrodes, converts the measured capacitance values into pressure values and forwards them to a further unit for processing or display.
  • FIG. 1 shows a view of a shape of a textile pressure sensor and a schematic diagram
  • Figure 2 Structural structure of a textile pressure sensor.
  • FIG. 2 shows the structural structure, namely three layers 10, 11 and 13.
  • the bottom layer 10 is a fully conductive textile that forms a (lower or first) flat electrode.
  • the top layer 13 is a non-conductive textile on which a plurality of conductive (Further) electrodes 12 is applied. These electrodes 12 can be embroidered with conductive thread or printed with conductive substances. In between is a spacer 11, a reversibly compressible foam or felt or any other suitable elastic
  • the lower (first) “large-area” electrode can be structured analogously to the upper one, in order to achieve higher accuracy or resolution (fewer stray fields). It is also possible that the conductive textile surface is only attached under the electrodes and not on the entire underside of the sensor textile 1. The remaining rest of the underside can be made with non-conductive textile.
  • the elastic material to be used e.g. a compressible foam
  • the requirements for the elastic material to be used depend on the specific application of the textile pressure sensor according to the invention. It is important that this material relaxes completely reversibly due to compression.
  • the so-called expansion time can be in a wide range, the intervals for the new measurement by the connected one
  • Measuring electronics are preferably longer than the presumed expansion time.
  • the mode of operation of the textile pressure sensor 1 according to the invention is explained with reference to FIG. 2: If pressure is exerted on a point on the sensor surface, the spacer 11 is compressed at the point in question and the distance between the lower 10 and the corresponding upper electrode 12 is reduced. This distance depends on the strength of the pressure and the spacer 11 used.
  • each top Electrode 12 connected to the fabric edge 15 with a sheet 14 of conductive material.
  • the web 14 can in turn be embroidered or printed.
  • the connection 14 from the electrodes 12 can also be made with normal insulated wire, which is embroidered onto the fabric with non-conductive thread.
  • the webs 14 or the wire are contacted with the external measuring electronics.
  • the sensor textile itself contains no electronics, all measuring electronics are connected externally. This increases the durability and reliability and the textile is easily washable. This is particularly advantageous if such a textile pressure sensor is integrated in a piece of clothing, for example sewn on.
  • the further electrodes 12 arranged opposite the first electrode 10 are preferably only separated by a line.
  • the elastic material forms a dielectric with a material-specific relative dielectric constant ⁇ r for the capacitors mentioned above. Any changes to ⁇ r with different compression can be made by the
  • Evaluation electronics are compensated accordingly.
  • a hydrophobic elastic material can be provided. It is also possible to provide the textile pressure sensor according to the invention with a moisture-impermeable protective layer at the bottom and / or at the top.
  • the invention is not limited to the application mentioned above for anti-decubitus clothing.
  • non-exhaustive application examples are given: i) Artificial skin for robots to simulate tactile senses.
  • EP 1 211 633 AI "Textile-like capacitive pressure sensor and method of apping the pressure exerted at points of a surface of a flexible and pliable object, particularly of a sail" STMicroelectronics S.R.l. IT - 20041 Agrate Brianza MI.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention concerne un capteur de pression textile (1) destiné à mesurer, de manière différenciée, une répartition de pression sur une surface, lequel capteur est constitué d'une première électrode plane (10) et d'une pluralité d'autres électrodes (12), maintenues individuellement par un matériau élastique (11) et placées à l'opposé de la première électrode (10). Ces autres électrodes (12) sont séparées de la première électrode plane (10), de préférence seulement par une ligne, afin de mesurer le plus globalement possible la force appliquée sur le capteur. Une ligne de connexion (14) par électrode (12) est prévue pour évaluer des changements de capacité du condensateur formé par la première électrode (10) et par l'autre électrode (12) au moyen d'un dispositif électronique de mesure externe. En particulier, ces capteurs de pression textiles (1) peuvent être cousus dans des vêtements anti-décubitus.
EP05749161A 2004-06-09 2005-05-23 Capteur de pression capacitif textile Withdrawn EP1756538A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05749161A EP1756538A1 (fr) 2004-06-09 2005-05-23 Capteur de pression capacitif textile

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04013555A EP1605240A1 (fr) 2004-06-09 2004-06-09 Capteur de pression textile
PCT/EP2005/005543 WO2005121729A1 (fr) 2004-06-09 2005-05-23 Capteur de pression capacitif textile
EP05749161A EP1756538A1 (fr) 2004-06-09 2005-05-23 Capteur de pression capacitif textile

Publications (1)

Publication Number Publication Date
EP1756538A1 true EP1756538A1 (fr) 2007-02-28

Family

ID=34925303

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04013555A Withdrawn EP1605240A1 (fr) 2004-06-09 2004-06-09 Capteur de pression textile
EP05749161A Withdrawn EP1756538A1 (fr) 2004-06-09 2005-05-23 Capteur de pression capacitif textile

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04013555A Withdrawn EP1605240A1 (fr) 2004-06-09 2004-06-09 Capteur de pression textile

Country Status (2)

Country Link
EP (2) EP1605240A1 (fr)
WO (1) WO2005121729A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2743387A1 (fr) 2012-12-14 2014-06-18 Fundacio Cetemmsa Produit d'étoffe et tissu de détection fabriqué à partir de celui-ci

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US7301351B2 (en) 2006-02-10 2007-11-27 Milliken & Company Printed capacitive sensor
US7208960B1 (en) * 2006-02-10 2007-04-24 Milliken & Company Printed capacitive sensor
US7395717B2 (en) 2006-02-10 2008-07-08 Milliken & Company Flexible capacitive sensor
NZ551819A (en) * 2006-12-04 2009-03-31 Zephyr Technology Ltd Impact detection system
JP2010519528A (ja) * 2007-02-23 2010-06-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 衣料用繊維製品内での剪断力及び圧力の測定
US9024907B2 (en) 2009-04-03 2015-05-05 Synaptics Incorporated Input device with capacitive force sensor and method for constructing the same
US8393229B2 (en) 2010-02-24 2013-03-12 The Hong Kong Research Institute Of Textiles And Apparel Limited Soft pressure sensing device
US9057653B2 (en) * 2010-05-11 2015-06-16 Synaptics Incorporated Input device with force sensing
US9272139B2 (en) 2010-07-01 2016-03-01 Marilyn J. Hamilton Universal closed-loop electrical stimulation system
US9557857B2 (en) 2011-04-26 2017-01-31 Synaptics Incorporated Input device with force sensing and haptic response
US9748952B2 (en) 2011-09-21 2017-08-29 Synaptics Incorporated Input device with integrated deformable electrode structure for force sensing
US9041418B2 (en) 2011-10-25 2015-05-26 Synaptics Incorporated Input device with force sensing
DE102012103856B4 (de) 2012-02-16 2016-09-29 Peter Seitz Textiler Drucksensor
US9229592B2 (en) 2013-03-14 2016-01-05 Synaptics Incorporated Shear force detection using capacitive sensors
CZ305877B6 (cs) * 2013-12-31 2016-04-20 Technická univerzita v Liberci Způsob měření svěrných účinků oblečení na měkký povrch lidského těla v místě vzájemných kontaktů a zařízení k provádění tohoto způsobu
DE102015105004B3 (de) * 2015-03-31 2016-09-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Textilmaterial mit eingearbeiteten Elastomersensoren
US10126861B2 (en) 2015-05-08 2018-11-13 Synaptics Incorporated Force sensor substrate
DE102016106074A1 (de) 2016-04-04 2017-10-05 Pilz Gmbh & Co. Kg Gewebe mit mehreren Gewebelagen
DE102016106071A1 (de) 2016-04-04 2017-10-05 Pilz Gmbh & Co. Kg Gewebe mit mehreren Gewebelagen und Verfahren zu dessen Herstellung
US10452211B2 (en) 2016-05-27 2019-10-22 Synaptics Incorporated Force sensor with uniform response in an axis
CN105865536A (zh) * 2016-06-28 2016-08-17 钱宝祥 一种可拉伸测量形变与应力的弹性传感器
DE102017206156B4 (de) 2017-04-11 2019-01-24 Festo Ag & Co. Kg Betätigungsvorrichtung, Verfahren zur Herstellung einer Betätigungsvorrichtung, und damit ausgestattete Anordnung
US10233571B1 (en) * 2017-12-26 2019-03-19 GM Global Technology Operations LLC Multi-functional textiles with integrated sensing and control elements
US11638554B2 (en) 2018-02-21 2023-05-02 T.J.Smith And Nephew, Limited Negative pressure dressing system with foot load monitoring
EP3804452A1 (fr) 2018-06-04 2021-04-14 T.J. Smith & Nephew, Limited Gestion de communication de dispositif dans des systèmes de surveillance d'activité d'utilisateur
CN112771358B (zh) * 2018-10-18 2023-09-26 松下知识产权经营株式会社 压敏元件以及电子设备
DE102019219521B4 (de) * 2019-12-13 2022-02-03 Robert Bosch Gmbh Schaumstoffsensor und Verfahren zum Betreiben einer Maschine

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DE4236133C1 (de) * 1992-10-26 1994-03-10 Siemens Ag Sensoranordnung zur Erfassung von Fingerabdrücken und Verfahren zu deren Herstellung
DE19732027A1 (de) * 1997-07-25 1999-01-28 Alphasat Communication Gmbh Kapazitiver Druckkraftsensor
WO1999053286A1 (fr) * 1998-04-09 1999-10-21 Ploechinger Heinz Structure capacitive detectrice de pression ou de force et son procede de production
DE19920990C2 (de) * 1999-05-06 2002-02-14 Siemens Ag Druckerfassungs-Anordnung
GB9911081D0 (en) * 1999-05-12 1999-07-14 Univ Brunel Switch
DE60011445D1 (de) * 2000-11-28 2004-07-15 St Microelectronics Srl Textilartiger kapazitiver Drucksensor und Verfahren zum Abbilden des auf Punkte einer Oberfläche eines flexiblen und biegsamen Objekts, insbesondere eines Segels, ausgeübten Drucks

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2743387A1 (fr) 2012-12-14 2014-06-18 Fundacio Cetemmsa Produit d'étoffe et tissu de détection fabriqué à partir de celui-ci

Also Published As

Publication number Publication date
WO2005121729A1 (fr) 2005-12-22
EP1605240A1 (fr) 2005-12-14

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