DE3411528A1 - Platform for measuring force distributions - Google Patents

Platform for measuring force distributions

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Publication number
DE3411528A1
DE3411528A1 DE19843411528 DE3411528A DE3411528A1 DE 3411528 A1 DE3411528 A1 DE 3411528A1 DE 19843411528 DE19843411528 DE 19843411528 DE 3411528 A DE3411528 A DE 3411528A DE 3411528 A1 DE3411528 A1 DE 3411528A1
Authority
DE
Germany
Prior art keywords
platform according
measuring
platform
dielectric
capacitor
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.)
Granted
Application number
DE19843411528
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German (de)
Other versions
DE3411528C2 (en
Inventor
Wolfgang Dipl.-Ing. Brunner (FH), 8999 Maierhöfen
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19843411528 priority Critical patent/DE3411528A1/en
Publication of DE3411528A1 publication Critical patent/DE3411528A1/en
Application granted granted Critical
Publication of DE3411528C2 publication Critical patent/DE3411528C2/de
Granted legal-status Critical Current

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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

Abstract

The invention relates to a platform for measuring force distributions, having a number of measuring capacitors arranged in an array, which are interrogated by row and column, in which there is a high sensitivity in the case of small effects of force, a large measuring range and a low mechanical overcoupling between the sensors. The rows or columns can be constructed from plastic film strips coated with metal on both sides, one side serving the purpose of screening and the other side forming the capacitor plates. The ability to move freely with respect to one another is achieved by reciprocal incisions between the plates. Projections are provided over the capacitor plates for the purpose of defined introduction of force. The dielectric consists of individual elastic support bodies, this resulting in the achievement of a wider measurement range and a complete mechanical decoupling of the sensors.

Description

Plattform zur Messung von KraftverteilungenPlatform for measuring force distributions

Die Erfindung betrifft eine Plattform zur Messung von Kraftverteilungen nach dem Oberbegriff des Anspruchs 1.The invention relates to a platform for measuring force distributions according to the preamble of claim 1.

Aufgabe der Erfindung ist die Schaffung einer kapazitiven Meßplattform für Kraftverteilungen, bestehend aus einem elastischen Dielektrikum mit einer großen Anzahl von matrixförmig angeordneten zeilen- und spaltenförmig verschalteten Kondensatorplatten, die eine hohe Empfindlichkeit bei kleinen Krafteinwirkungen einen weiten Meßbereich und eine geringe mechanische gegenseitige Beeinflussung der einzelnen Meßfühler aufweist.The object of the invention is to create a capacitive measuring platform for force distribution, consisting of an elastic dielectric with a large Number of capacitor plates arranged in a matrix, in rows and columns, which have a high sensitivity with small forces acting over a wide measuring range and a low mechanical mutual influence of the individual sensors having.

Bekannt sind nach DE 2529475 und DE 3025362 kapazitive Kraftverteilungsmeßeinrichtungen die als Kondensatorplatten metallisierte Kunststoffolien- oder verschiebbare Metallgitterstreifen verwenden.According to DE 2529475 and DE 3025362, capacitive force distribution measuring devices are known the plastic film or sliding metal grid strips metallized as capacitor plates use.

Bei metallisierten Kunststoffolienstreifen tritt ein mechanisches überkoppeln entlang der zeilen- oder spaltenförmig verschalteten Kondensatorplatten auf, das durch ein verschiebbares Metallgitter zwar vermindert, sich jedoch insbesondere bei kleinen Krafteinwirkungen stark bemerkbar macht.In the case of metallized plastic film strips, a mechanical one occurs overcouple along the line or columnar interconnected capacitor plates on, which is reduced by a movable metal grille, but in particular makes it strongly noticeable with small force effects.

Um diese Nachteile zu vermeiden, wird eine elektrisch leitfähige biegsame Schicht nach den Ansprüchen 1 bis 3 mit Aussparungen oder Einschnitten versehen (Fig 1). Es sollten nach Möglichkeit mindestens zwei wechselseitige Einschnitte zwischen den Kondensatorplatten angebracht sein, da hierdurch eine freie Beweglichkeit der Platten zueinander erreicht wird.To avoid these disadvantages, an electrically conductive flexible Layer according to claims 1 to 3 provided with recesses or incisions (Fig 1). If possible, there should be at least two reciprocal incisions be attached between the capacitor plates, as this allows free mobility the plates to each other is achieved.

Die Einschnitte können z.B. rechteckförmig oder keilförmig ausgeführt sein. Es können auch die Kondensatorplatten selber mit Einschnitten versehen sein. Eine Lochung am Ende der Einschnitte erhöht die Reißfestigkeit. Werden die Kondensatorplatten mit ihren Verbindungsstegen fest z.B. in Silikonkautschuk vergossen, so wird eine sehr hohe Robustheit erreicht. Werden Ober- und Unterseite des Dielektrikums nach diesem Verfahren beschichtet, so können voll flexible und dünne Meßmatten hergestellt werden.The incisions can, for example, be rectangular or wedge-shaped be. It can also use the capacitor plates himself with incisions be provided. A perforation at the end of the incisions increases the tear resistance. Will the capacitor plates with their connecting webs firmly, e.g. in silicone rubber potted, a very high level of robustness is achieved. Be top and bottom of the dielectric coated by this process, so can be fully flexible and thin measuring mats are produced.

Die entsprechenden Abschirmmaßnahmen sind in den Ansprüchen 4-6 u. 9 beschrieben, wobei diese so ausgeführt sind, daß auch hierdurch kein mechanisches überkoppeln der einzelnen Meßfühler auftritt.The corresponding shielding measures are in claims 4-6 u. 9 described, these being designed so that no mechanical overcoupling of the individual sensors occurs.

In Fig 2 ist ein Streifen mit Abschirmung abgebildet.In Fig. 2 a strip with a shield is shown.

Durch die Vorsprünge über den Kondensatorplatten an der Oberseite wird die Kraft definiert direkt auf die Meßkondensatoren eingeleitet. Es erhöht sich hierdurch die Kraft pro Meßfühler und somit die Ansprechempfindlichkeit. Die Vorsprünge können aus starrem oder flexiblem Material bestehen.Through the protrusions over the capacitor plates on the top the force is applied directly to the measuring capacitors in a defined manner. It increases This increases the force per sensor and thus the sensitivity. the Projections can be made of rigid or flexible material.

Nach DE 2529475 und DE 3025362 sind Kraftverteilungsmeßeinrichtungen bekannt, die als Dielektrikum Matten aus Naturkautschuk oder Polyurethan verwenden. Schaumstoffe haben jedoch den Nachteil, daß ihre Verformungskennlinien insbesondere bei kleinen Krafteinwirkungen eine hohe Nichlinearität aufweisen. Es ergeben sich somit geringe Ansprechempfindlichkeiten. Werden weiche Schaumstoffe verwendet, so ist der Meßbereich stark begrenzt. Diese Nachteile sollen nach AT-355836 dadurch vermieden werden, daß ein Dielektrikum aus Gummi oder Kunststoff mit Hohlräumen versehen wird, in denen ein Unterdruck herrscht.According to DE 2529475 and DE 3025362 are force distribution measuring devices known who use mats made of natural rubber or polyurethane as dielectric. However, foams have the disadvantage that their deformation characteristics in particular have a high non-linearity with small force effects. It surrender thus low responsiveness. If soft foams are used, so the measuring range is very limited. According to AT-355836, these disadvantages are intended to result avoided that a dielectric made of rubber or plastic with cavities is provided, in which there is a negative pressure.

Bei der erfindungsgemäßen Anordnung können nach den Ansprüchen 1 u. 10 - 12 eine niedrige Ansprechempfindlichkeit und ein weiter Meßbereich erzielt werden. Insbesondere wird hierdurch eine optimale mechanische Entkopplung der Meßfühler zueinander erreicht.In the arrangement according to the invention can according to claims 1 u. 10-12 achieves a low response sensitivity and a wide measuring range will. In particular, this results in an optimal mechanical decoupling of the sensors reached each other.

In Fig. 3 sind einige Ausführungsbeispiele für Abstützkörper abgebildet.In Fig. 3 some embodiments for support bodies are shown.

Fig 4 zeigt den Ausschnitt einer Meßplattform mit elastischen Abstützkörpern (3), gegeneinander frei beweglichen Kondensatorplatten (1) und darüberliegenden Vorsprüngen (2).4 shows the detail of a measuring platform with elastic support bodies (3), capacitor plates (1) that can move freely against each other and above them Protrusions (2).

Claims (1)

Patentansprüche: Plattform zur Messung von Kraftverteilungen, mit einer großen Empfindlichkeit und einem weiten Meßbereich, bestehend aus gir auf beiden Seiten eines elastischen Dielektrikums Zeilen- und Spaltenförmig verbundenen, mindestens auf einer Seite gegeneinander beweglichen Kondensatorpiatten, dadurch gekennzeichnet, daß die Kondensatorpiatten durch Stege miteinander verbunden sind, die durch Einschnitte bzw. Aussparungen in biegsame leitfähige Streifen gebildet werden (1), daß sich an der Oberseite der Meßfläche über jedem Meßkondensator ein Vorsprung befindet der im wesentlichen die Größe der darunterliegenden Kondensatorplatte hat (2), und daß das Dielektrikum aus einer Struktur einzelner elastischer Abstützkörper (3) besteht.Claims: Platform for measuring force distributions, with a high sensitivity and a wide measuring range, consisting of gir on both sides of an elastic dielectric connected in rows and columns, at least on one side mutually movable capacitor plates, thereby characterized in that the capacitor plates are connected to one another by webs, formed by cuts or recesses in flexible conductive strips (1) that is located at the top of the measuring surface above each measuring capacitor The protrusion is essentially the size of the capacitor plate underneath has (2), and that the dielectric consists of a structure of individual elastic support bodies (3) exists. 2.) Plattform nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eine Aussparung oder ein Einschnitt nach jeder Kondensatorplatte vorhanden ist, und daß diese entlang der leitfähigen Streifen im wesentlichen wechselseitig ausgeführt sind.2.) Platform according to claim 1, characterized in that at least there is a recess or an incision after each capacitor plate, and that these are essentially reciprocal along the conductive strips are. 3.) Plattform nach Anspruch 1 u 2, dadurch gekennzeichnet, daß sowohl die Kondensatorplatten als auch ihre Verbindungsstege aus metallbeschichteten Kunststoffolien, leitfähigen Lacken oder leitfähigen Kunststoffen bestehen.3.) Platform according to claim 1 and 2, characterized in that both the capacitor plates as well as their connecting webs made of metal-coated plastic films, conductive paints or conductive plastics. 4.) Plattform nach Anspruch 1 - 3, dadurch gekennzeichnet, daß auf den mit Aussparungen versehenen leitfähigen Streifen der Oberseite des Dielektrikums eine hiervon elektrisch isolierte Abschirmfolie (4) geklebt ist.4.) Platform according to claim 1-3, characterized in that on the recessed conductive strip on the top of the dielectric a shielding film (4) which is electrically insulated from this is glued. 5.) Plattform nach Anspruch 4, dadurch gekennzeichnet, daß die Abschirmfolie (4) aus elektrisch leitendem Silikonkautschuk besteht.5.) Platform according to claim 4, characterized in that the shielding film (4) is made of electrically conductive silicone rubber. 6.) Plattform nach ArisruXh-4, dadu.-cE gekennzeichnet, daß sich die Abschirmung (5) direkt auf der Rückseite von doppelseitig beschichteten mit Aussparungen versehenen Kunststoffolienstreifen (6) befindet und ebenfalls Aussparungen besitzt.6.) Platform according to ArisruXh-4, dadu.-cE marked that the Shielding (5) directly on the back of double-sided coated with cutouts provided plastic film strips (6) and also has recesses. 7.) Plattform nach Anspruch 1 - 6, dadurch gekennzeichnet, daß die Vorsprünge (2) an der Oberseite der Plattform aus Gummi oder Silikonkautschuk bestehen.7.) Platform according to claim 1-6, characterized in that the Projections (2) on the top of the platform are made of rubber or silicone rubber. 8.) Plattform nach Anspruch 1, dadurch gekennzeichnet daß die Kondensatorplatten der Unterseite des Dielektrikums (8) als Streifen einer metallbeschichteten gedruckten Platine oder Folie (9) bestehen.8.) Platform according to claim 1, characterized in that the capacitor plates the underside of the dielectric (8) as a strip of a metal-coated printed Board or foil (9) exist. 9.) Plattform nach Anspruch 1 - 8, dadurch gekennzeichnet, daß sich unter der gedruckten Platine oder Folie ein Abschirmblech oder Folie aus elektrisch leitfähigem Material befindet 10.) Plattform nach Anspruch 1 - 9, dadurch gekennzeichnet, daß die Abstützkörper des Dielektrikums (3) aus Gummi oder Silikonkautschuk bestehen.9.) Platform according to claim 1-8, characterized in that under the printed circuit board or foil a shielding plate or foil made of electrical conductive material is 10.) Platform according to claim 1 - 9, characterized in, that the support body of the dielectric (3) consist of rubber or silicone rubber. 11.) Plattform nach Anspruch 1 - 10, dadurch gekennzeichnet, daß pro Meßkondensator mehrere Abstützkörper (3) vorhanden sind.11.) Platform according to claim 1 - 10, characterized in that per Measuring capacitor several support bodies (3) are available. 12.) Plattform nach Anspruch 1,10 u. 11, dadurch gekennzeichnet, daß die Querschnittsfläche der Abstützkörper sich entlang ihrer Länge mindestens an einer Stelle stark verringert.12.) Platform according to claim 1, 10 and 11, characterized in that the cross-sectional area of the support body at least increases along its length greatly reduced in one place.
DE19843411528 1984-03-28 1984-03-28 Platform for measuring force distributions Granted DE3411528A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843411528 DE3411528A1 (en) 1984-03-28 1984-03-28 Platform for measuring force distributions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843411528 DE3411528A1 (en) 1984-03-28 1984-03-28 Platform for measuring force distributions

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DE3411528A1 true DE3411528A1 (en) 1985-10-10
DE3411528C2 DE3411528C2 (en) 1988-11-17

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634855C1 (en) * 1986-10-13 1988-03-31 Peter Seitz Capacitive measuring arrangement for the determination of forces and / or pressures
DE3704870C1 (en) * 1987-02-16 1988-04-28 Peter Seitz Device for measuring the flat distribution of pressure forces
DE3642088A1 (en) * 1986-12-10 1988-06-23 Wolfgang Brunner ARRANGEMENT FOR MEASURING POWER DISTRIBUTION
DE3734023A1 (en) * 1987-10-08 1989-04-27 Brunner Wolfgang Measuring mat for determining pressure distributions
DE3803004A1 (en) * 1988-02-02 1989-08-10 Brunner Wolfgang METHOD AND DEVICE FOR STORING PRESSURE HISTORIES
DE3841243A1 (en) * 1988-12-07 1990-06-13 Brunner Wolfgang Measuring arrangement, preferably in the form of a measuring platform
WO2006103048A1 (en) * 2005-04-01 2006-10-05 Peter Seitz Flexible force-distribution measuring sensor comprising several layers
EP1698876A3 (en) * 2005-03-02 2008-05-07 Delphi Technologies, Inc. Capacitive load cell apparatus having a non-planar nonconductive elastomeric dielectric
DE102015103261B3 (en) * 2015-03-06 2016-01-21 Novel GmbH sensor
DE102015101326A1 (en) * 2015-01-29 2016-08-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Measuring device and forming device with a measuring device
EP2946185A4 (en) * 2013-01-21 2016-08-24 Kinova Dielectric geometry for capacitive-based tactile sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013002964B4 (en) * 2013-02-22 2020-06-25 Thomas Sefrin Aircraft lifting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2448398A1 (en) * 1973-10-10 1975-04-24 Uniroyal Inc WEIGHING MAT
DE2529475A1 (en) * 1975-07-02 1977-01-13 Klaus Dr Nicol DEVICE FOR THE TIME-DEPENDENT MEASUREMENT OF PHYSICAL SIZES
AT355836B (en) * 1977-02-10 1980-03-25 Semperit Ag CAPACITOR FOR MEASURING FORCES
DE3025362A1 (en) * 1980-07-04 1982-01-28 Ewald Max Christian Dipl.-Phys. 6000 Frankfurt Hennig Force transducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2448398A1 (en) * 1973-10-10 1975-04-24 Uniroyal Inc WEIGHING MAT
DE2529475A1 (en) * 1975-07-02 1977-01-13 Klaus Dr Nicol DEVICE FOR THE TIME-DEPENDENT MEASUREMENT OF PHYSICAL SIZES
AT355836B (en) * 1977-02-10 1980-03-25 Semperit Ag CAPACITOR FOR MEASURING FORCES
DE3025362A1 (en) * 1980-07-04 1982-01-28 Ewald Max Christian Dipl.-Phys. 6000 Frankfurt Hennig Force transducer

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264047A2 (en) * 1986-10-13 1988-04-20 Peter Seitz Capacitive measuring device for determination of forces and/or pressures
US4836033A (en) * 1986-10-13 1989-06-06 Peter Seitz Capacitive measuring assembly for determining forces and pressures
EP0264047A3 (en) * 1986-10-13 1989-07-19 Peter Seitz Capacitive measuring device for determination of forces capacitive measuring device for determination of forces and/or pressures and/or pressures
DE3634855C1 (en) * 1986-10-13 1988-03-31 Peter Seitz Capacitive measuring arrangement for the determination of forces and / or pressures
DE3642088A1 (en) * 1986-12-10 1988-06-23 Wolfgang Brunner ARRANGEMENT FOR MEASURING POWER DISTRIBUTION
US4862743A (en) * 1987-02-16 1989-09-05 Peter Seitz Device for measuring the areal distribution of compressive forces
DE3704870C1 (en) * 1987-02-16 1988-04-28 Peter Seitz Device for measuring the flat distribution of pressure forces
EP0279361A1 (en) * 1987-02-16 1988-08-24 Peter Seitz Device for measuring the pressure distribution in an area
DE3734023A1 (en) * 1987-10-08 1989-04-27 Brunner Wolfgang Measuring mat for determining pressure distributions
DE3803004A1 (en) * 1988-02-02 1989-08-10 Brunner Wolfgang METHOD AND DEVICE FOR STORING PRESSURE HISTORIES
DE3841243A1 (en) * 1988-12-07 1990-06-13 Brunner Wolfgang Measuring arrangement, preferably in the form of a measuring platform
EP1698876A3 (en) * 2005-03-02 2008-05-07 Delphi Technologies, Inc. Capacitive load cell apparatus having a non-planar nonconductive elastomeric dielectric
WO2006103048A1 (en) * 2005-04-01 2006-10-05 Peter Seitz Flexible force-distribution measuring sensor comprising several layers
EP2946185A4 (en) * 2013-01-21 2016-08-24 Kinova Dielectric geometry for capacitive-based tactile sensor
US9645019B2 (en) 2013-01-21 2017-05-09 Kinova Dielectric geometry for capacitive-based tactile sensor
DE102015101326A1 (en) * 2015-01-29 2016-08-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Measuring device and forming device with a measuring device
DE102015101326B4 (en) 2015-01-29 2020-07-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Measuring device and forming device with a measuring device
DE102015103261B3 (en) * 2015-03-06 2016-01-21 Novel GmbH sensor
US10335056B2 (en) 2015-03-06 2019-07-02 Novel GmbH Sensor for electrically measuring a force having a spring unit arranged in-between surfaces

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