WO2017072242A1 - Operating element, particularly in motor vehicles - Google Patents
Operating element, particularly in motor vehicles Download PDFInfo
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- WO2017072242A1 WO2017072242A1 PCT/EP2016/075951 EP2016075951W WO2017072242A1 WO 2017072242 A1 WO2017072242 A1 WO 2017072242A1 EP 2016075951 W EP2016075951 W EP 2016075951W WO 2017072242 A1 WO2017072242 A1 WO 2017072242A1
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- Prior art keywords
- operating element
- sensors
- piezoresistive
- element according
- layer
- Prior art date
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- 239000000758 substrate Substances 0.000 claims abstract description 18
- 238000011156 evaluation Methods 0.000 claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000010985 leather Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/964—Piezoelectric touch switches
- H03K17/9643—Piezoelectric touch switches using a plurality of detectors, e.g. keyboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
- B62D1/046—Adaptations on rotatable parts of the steering wheel for accommodation of switches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
- B62D1/06—Rims, e.g. with heating means; Rim covers
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- 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
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
-
- 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
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/205—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using distributed sensing elements
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- 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
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9625—Touch switches using a force resistance transducer
Definitions
- the invention relates to an operating element, in particular in motor vehicles, on the surface of which pressure-sensitive piezoresistive sensors for switching and controlling vehicle-internal sequences and applications are applied.
- motor vehicle has to be interpreted broadly, and may include four- and two-wheeled land vehicles as well as water or air vehicles.
- each manually operable control, switching or control element is meant, such as a steering wheel, a handlebar, a joystick, etc.
- a steering wheel such as a steering wheel, a handlebar, a joystick, etc.
- the invention will be described below but using the example of a steering wheel in a car.
- a steering wheel with feeler elements is known, wherein the feeler elements are piezoresistive sensors which are arranged at defined locations on the circumference of the steering wheel rim or the steering wheel spokes.
- WO 2014/0852778 discloses an optical system with infrared sensors. Infrared sensors are arranged uniformly distributed around the steering wheel, but they have the disadvantage that there must always be an optical connection to the measurement object. In the case of a steering wheel, this means that the sensor surface must not be damaged. In addition, such a solution is very expensive.
- the invention is therefore the object of an operating element in such a way that with the help of cost-effective piezoresistive sensors in addition to the gripping and touching detection and gesture recognition is possible.
- the invention solves this problem according to the characterizing part of patent claim 1, characterized in that a plurality of piezoresistive sensors is arranged in a matrix in rows and columns close together on a substrate layer, wherein the substrate surrounds the entire control area and the individual sensors via conductor tracks are connected to an evaluation unit which processes the individual sensor signals.
- the piezoresistive sensors are combined in subregions to form an application-specific group.
- a sensor group on the left side of the steering wheel for the audio system and another group on the right side of the steering wheel for a navigation system may be responsible.
- the substrate layer carrying the piezoresistive sensors is arranged between a first foam layer arranged on the operating element and an optional second foam layer, which is covered by a protective cover.
- the protective cover can be made of leather or plastic.
- the piezoresistive sensors are arranged on a flexible substrate (for example a foil or a fabric).
- a flexible substrate for example a foil or a fabric.
- each sensor consists of a piezoresistive layer, which is fastened above the substrate by means of spacers, wherein the contacts for the conductor tracks are arranged either on the substrate or on the piezoresistive layer. Sensors constructed in this way are, as stated above, arranged close to each other in a matrix.
- the individual sensors can be arranged in mutually parallel columns and rows. But it is also possible that adjacent rows / columns consists of mutually offset sensors.
- control element to an element for controlling the direction of travel, so for example, a steering wheel, in which at least the turntable is completely surrounded with the piezoresistive sensor film.
- Claim 8 proposes that the evaluation unit is integrated in the control itself.
- the sensors are designed and interconnected in such a way that the evaluation unit differs with appropriate contact between gripping and gesture recognition.
- the embodiment of the invention combines all known from the prior art possibilities with a simple and inexpensive construction and high spatial resolution.
- Fig. 1 a equipped with a sensor matrix
- Fig. 2 is a cross-section A-A of the turntable according to Fig. 1;
- Fig. 3 is a sensor mat according to the invention with
- the steering wheel of a motor vehicle is shown schematically and generally provided with the reference numeral 1.
- the steering rim 2 has a first foam layer 4 arranged around the skeleton 3 of the steering rim 2.
- a film is arranged with piezoresistive sensors arranged close to each other, and provided with the reference numeral 5.
- the sensor layer 5 is covered with a second foam layer 6 and this in turn covered with a leather covering 7.
- a plurality of piezoresistive sensors 8 on the Circumference of the steering wheel 2 arranged.
- the individual sensors 8 are connected via printed conductors, not shown, to an evaluation unit 9.
- This evaluation unit 9 is integrated in, for example, a steering wheel spoke 10.
- FIG. 3 shows schematically how the regularly arranged sensors 8 are arranged on a substrate 11. Schematically illustrated is the electrical connection 12 with the evaluation unit. 9 On a substrate 1 1, which may be a flexible film, spacers 13 are applied, which carry a piezoelectric layer 14, wherein the contacts 15 for the electrical connections 12 either at the piezoelectric layer 14 or the substrate layer 1 1 can be arranged. Between the piezoelectric layer 14 and the substrate layer 1 1 thus remains a gap into which the piezoelectric layer 14 can be pressed in contact, whereby a signal is generated, which is transmitted via the electrical connections 12 to the evaluation unit 9.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Push-Button Switches (AREA)
Abstract
The invention relates to an operating element, in particular in motor vehicles, to the surface of which pressure-sensitive piezo-resistive sensors for switching and controlling vehicle-internal processes and applications are applied, the operating element being characterized in that a plurality of the piezo-resistive sensors (8) is arranged tightly next to and below each other in rows and columns in a matrix on a substrate layer (11) which covers the entire operating element (1), and the individual sensors (8) are connected, via conductor paths (12), to an evaluation unit (9) that processes the individual sensor signals.
Description
Bedienelement. insbesondere in Kraftfahrzeugen Die Erfindung betrifft ein Bedienelement, insbesondere in Kraftfahrzeugen, auf dessen Oberfläche druckempfindliche piezoresistive Sensoren zur Schaltung und Steuerung von kraftfahrzeuginternen Abläufen und Anwendungen aufgebracht sind. Control. The invention relates to an operating element, in particular in motor vehicles, on the surface of which pressure-sensitive piezoresistive sensors for switching and controlling vehicle-internal sequences and applications are applied.
Dabei ist der Begriff „Kraftfahrzeug" weit auszulegen. Es kann sich neben vier- und zweirädigen Landfahrzeugen auch um Wasser- oder Luftfahrzeuge handeln. The term "motor vehicle" has to be interpreted broadly, and may include four- and two-wheeled land vehicles as well as water or air vehicles.
Als Bedienelement ist jedes mit der Hand betätigbare Steuer-, Schalt- oder Regelelement gemeint, wie zum Beispiel ein Lenkrad, ein Lenker, ein Joystick etc.. Die Erfindung wird aber im Folgenden am Beispiel eines Lenkrades in einem PKW beschrieben. As an operating element, each manually operable control, switching or control element is meant, such as a steering wheel, a handlebar, a joystick, etc. The invention will be described below but using the example of a steering wheel in a car.
Die Zeiten, in denen das Lenkrad lediglich der Fahrtrichtungsänderung diente und allenfalls die Hupe im Lenkrad integriert war, sind lange vorbei. Mittlerweile ist das Lenkrad zum Schalt- und Regelelement für viele im Auto vorhandene Anwendungen geworden, wie zum Beispiel das Zuschalten von Fahrerassistenzsystemen, zum Regeln der Lautstärke von Audiosystemen, zur Betätigung einer Freisprecheinrichtung usw..
Diese Schalter und Regler können als klassische Tast- oder Kippschalter ausgebildet sein. Mehr und mehr halten jedoch berührungsempfindliche oder Näherungs-Sensoren Einzug in die Fahrzeugtechnik. The times when the steering wheel was used only to change direction and at most the horn was integrated in the steering wheel, are long gone. Meanwhile, the steering wheel has become the switching and control element for many existing in the car applications, such as the connection of driver assistance systems, to control the volume of audio systems, to operate a speakerphone, etc .. These switches and regulators can be designed as classic tactile or toggle switches. However, touch-sensitive or proximity sensors are increasingly finding their way into vehicle technology.
So ist aus der DE 199 27 464 D4 ein Lenkrad mit Tastelementen bekannt, wobei die Tastelemente piezoresistive Sensoren sind, die an definierten Orten am Umfang des Lenkkranzes oder der Lenkradspeichen angeordnet sind. For example, from DE 199 27 464 D4 a steering wheel with feeler elements is known, wherein the feeler elements are piezoresistive sensors which are arranged at defined locations on the circumference of the steering wheel rim or the steering wheel spokes.
Durch Berührung der Sensorflächen können bestimmte Systeme ein- oder ausgeschaltet werden. Durch Verstärken oder Verringern der auf die Sensoren ausgeübten Kraft können Steuerfunktionen wie„lauter",„leiser",„links",„rechts" etc. aktiviert werden. Aus der DE 10 2010 035 940 B4 ist ein Handerkennungssystem für Lenkräder bekannt. Um den Umfang des Lenkkranzes herum ist eine piezoresistive Schicht angeordnet, die auf die vom Fahrzeugführer ausgeübte Kraft beim Umgreifen des Lenkrades reagiert. Wird von diesem System beispielsweise eine Anomalität wie zum Beispiel eine verkrampfte Handhaltung detektiert, können die Sensorsignale zum Abschalten des Motors führen oder zur Einleitung eines Bremsvorganges. By touching the sensor surfaces certain systems can be switched on or off. By increasing or decreasing the force applied to the sensors, control functions such as "louder", "quieter", "left", "right" etc. can be activated. From DE 10 2010 035 940 B4 a hand-recognition system for steering wheels is known. Around the circumference of the steering wheel around a piezoresistive layer is arranged, which responds to the force exerted by the driver when gripping the steering wheel. For example, if an abnormality such as a cramped hand gesture is detected by this system, the sensor signals may cause the motor to shut down or initiate a braking operation.
All diesen angeführten System gemeinsam ist die Tatsache, dass lediglich örtliche begrenzte Tast- und Greiffunktionen möglich sind. Sie bieten zur Erkennung der Greif- und Berührungsposition nur eine sehr geringe Auflösung und sind darüber hinaus kompliziert und kostenintensiv aufgebaut. Common to all these systems is the fact that only localized tactile and gripping functions are possible. They provide only a very low resolution for detecting the gripping and contacting position and, moreover, are complicated and cost-intensive.
Die bekannten Lösungen für die Grifferkennung sind vor allem störanfällig und/oder bilden nur sehr große zusammenhängende Flächen ab. Aus diesem Grund müssen sehr viele Ausnahmefälle berücksichtigt werden wie zum Beispiel metallisierte Oberflächen oder Anbauteile. Durch die örtliche Begrenztheit und die geringe Ortsauflösung ist mit diesen vorbekannten Systemen nur eine recht statische Greif- und Berührerkennung möglich, nicht aber eine Gestenerkennung. Zu diesem Zweck ist aus der WO 2014/0852778 ein optisches System mit Infrarotsensorik bekannt. Um das Lenkrad herum sind gleichmäßig verteilt Infrarotsensoren angeordnet, die jedoch den Nachteil haben, dass immer eine optische Verbindung zum Messobjekt bestehen muss.
Im Fall eines Lenkrades bedeutet das, dass die Sensorfläche nicht geledert werden darf. Darüber hinaus ist eine derartige Lösung sehr kostenintensiv. The known solutions for the Grifferkennung are mainly susceptible to interference and / or form only very large contiguous areas. For this reason, many exceptional cases have to be taken into account, such as metallised surfaces or add-on parts. Due to the local limitations and the low spatial resolution is only a fairly static gripping and touching detection possible with these prior art systems, but not a gesture recognition. For this purpose, WO 2014/0852778 discloses an optical system with infrared sensors. Infrared sensors are arranged uniformly distributed around the steering wheel, but they have the disadvantage that there must always be an optical connection to the measurement object. In the case of a steering wheel, this means that the sensor surface must not be damaged. In addition, such a solution is very expensive.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Bedienelement so auszugestalten, dass mit Hilfe von kostengünstigen piezoresistiven Sensoren neben der Greif- und Berührerkennung auch eine Gestenerkennung möglich ist. The invention is therefore the object of an operating element in such a way that with the help of cost-effective piezoresistive sensors in addition to the gripping and touching detection and gesture recognition is possible.
Die Erfindung löst diese Aufgabe gemäß dem kennzeichnenden Teil des Patentanspruchs 1 dadurch, dass eine Vielzahl von piezoresistiven Sensoren in einer Matrix in Zeilen und Spalten dicht an dicht auf einer Substratschicht angeordnet ist, wobei das Substrat das gesamte Bedienelement flächendeckend umgibt und die einzelnen Sensoren über Leiterbahnen mit einer Auswerteeinheit verbunden sind, die die einzelnen Sensorsignale verarbeitet. Mit Hilfe dieser Anordnung ist es möglich, zum einen wie aus dem Stand der Technik bekannt, durch Antippen oder Umfassen des Bedienelementes einen Schaltvorgang auszulösen. Durch Gleitbewegungen der Finger oder Hände über eine Sensorfläche in der einen oder anderen Richtung können auch Steuer- oder Regelvorgänge bewirkt werden, wie zum Beispiel die Fahrtrichtungsanzeige links oder rechts oder auch die Lautstärkesteuerung. The invention solves this problem according to the characterizing part of patent claim 1, characterized in that a plurality of piezoresistive sensors is arranged in a matrix in rows and columns close together on a substrate layer, wherein the substrate surrounds the entire control area and the individual sensors via conductor tracks are connected to an evaluation unit which processes the individual sensor signals. With the help of this arrangement, it is possible, on the one hand, as known from the prior art, trigger a switching operation by tapping or embracing the operating element. By sliding the fingers or hands on a sensor surface in one or the other direction and control operations can be effected, such as the direction indicator left or right or the volume control.
Gemäß Anspruch 2 ist vorgesehen, dass die piezoresistiven Sensoren in Teilbereichen zu jeweils einer anwendungsspezifischen Gruppe zusammengefasst sind. According to claim 2, it is provided that the piezoresistive sensors are combined in subregions to form an application-specific group.
So kann eine auf der linken Seite des Lenkrads vorhandene Sensorgruppe für das Audiosystem und eine andere Gruppe auf der rechten Seite des Lenkrads für ein Navigationssystem verantwortlich sein. Thus, a sensor group on the left side of the steering wheel for the audio system and another group on the right side of the steering wheel for a navigation system may be responsible.
Gemäß Anspruch 3 ist die die piezoresistiven Sensoren tragende Substratschicht zwischen einer auf dem Bedienelement angeordneten ersten Schaumschicht und einer optionalen zweiten Schaumschicht angeordnet, welche von einer Schutzhülle abgedeckt ist. Die Schutzhülle kann hierbei aus Leder oder Kunststoff bestehen.
Gemäß Anspruch 4 ist vorgesehen, dass die piezoresistiven Sensoren auf einem flexiblen Substrat (beispielsweise einer Folie oder einem Stoff) angeordnet sind. Für den Aufbau der Sensoren sind verschiedene Versionen denkbar. Eine Möglichkeit ist, dass jeder Sensor aus einer piezoresistiven Schicht besteht, die oberhalb des Substrats mittels Abstandshaltern befestigt ist, wobei die Kontaktierungen für die Leiterbahnen entweder am Substrat oder an der piezoresistiven Schicht angeordnet sind. Auf diese Weise aufgebaute Sensoren sind wie bereits oben ausgeführt eng bei einander liegend in einer Matrix angeordnet. Dabei können gemäß Anspruch 5 die einzelnen Sensoren in parallel zueinander angeordneten Spalten und Zeilen angeordnet sein. Es ist aber auch möglich, dass benachbarte Zeilen/Spalten aus versetzt zueinander angeordneten Sensoren besteht. According to claim 3, the substrate layer carrying the piezoresistive sensors is arranged between a first foam layer arranged on the operating element and an optional second foam layer, which is covered by a protective cover. The protective cover can be made of leather or plastic. According to claim 4 it is provided that the piezoresistive sensors are arranged on a flexible substrate (for example a foil or a fabric). For the construction of the sensors different versions are conceivable. One possibility is that each sensor consists of a piezoresistive layer, which is fastened above the substrate by means of spacers, wherein the contacts for the conductor tracks are arranged either on the substrate or on the piezoresistive layer. Sensors constructed in this way are, as stated above, arranged close to each other in a matrix. In this case, according to claim 5, the individual sensors can be arranged in mutually parallel columns and rows. But it is also possible that adjacent rows / columns consists of mutually offset sensors.
Gemäß Anspruch 7 ist vorgesehen, dass es sich bei dem Bedienelement um ein Element zur Steuerung der Fahrtrichtung, also beispielsweise ein Lenkrad handelt, bei dem zumindest der Lenkkranz vollständig mit der piezoresistiven Sensorfolie umgeben ist. According to claim 7 it is provided that it is the control element to an element for controlling the direction of travel, so for example, a steering wheel, in which at least the turntable is completely surrounded with the piezoresistive sensor film.
Anspruch 8 schlägt vor, dass die Auswerteinheit im Bedienelement selbst integriert ist. Beim erfindungsgemäßen Bedienelement ist gemäß Anspruch 9 vorgesehen, dass die Sensoren derart ausgebildet und verschaltet sind, dass die Auswerteeinheit bei entsprechender Berührung zwischen Greif- und Gestenerkennung unterscheidet. Claim 8 proposes that the evaluation unit is integrated in the control itself. When operating element according to the invention is provided according to claim 9, that the sensors are designed and interconnected in such a way that the evaluation unit differs with appropriate contact between gripping and gesture recognition.
Somit vereint die erfindungsgemäße Ausgestaltung alle aus dem Stand der Technik bekannten Möglichkeiten bei einfachem und kostengünstigem Aufbau und hoher Ortsauflösung. Thus, the embodiment of the invention combines all known from the prior art possibilities with a simple and inexpensive construction and high spatial resolution.
Die Erfindung wird im Folgenden anhand von Zeichnungen dargestellt und beschrieben.
Es zeigen: The invention is illustrated and described below with reference to drawings. Show it:
Fig. 1 ein mit einer Sensormatrix ausgestattetes Fig. 1 a equipped with a sensor matrix
Lenkrad; Steering wheel;
Fig. 2 ein Querschnitt A-A des Lenkkranzes gemäß Fig. 1 ; Fig. 2 is a cross-section A-A of the turntable according to Fig. 1;
Fig. 3 eine erfindungsgemäße Sensormatte mit Fig. 3 is a sensor mat according to the invention with
Verbindungsleitungen zu einer Auswerte- Elektronik; Connection lines to an evaluation electronics;
Fig. 4 Querschnitt durch eine Sensormatte in vergrößerter Darstellung 4 shows a cross section through a sensor mat in an enlarged view
In der Figur 1 ist das Lenkrad eines Kraftfahrzeuges schematisch dargestellt und allgemein mit dem Bezugszeichen 1 versehen. Im Lenkkranz 2 ist wie aus Figur 2 hervorgeht, die einen Schnitt A-A aus Figur 1 darstellt, um das Skelett 3 des Lenkkranzes 2 eine erste Schaumstoffschicht 4 herum angeordnet. Auf dieser ersten Schaumstoffschicht 4 ist eine Folie mit dicht aneinander angeordneten piezoresistiven Sensoren angeordnet, und mit dem Bezugszeichen 5 versehen. Die Sensorschicht 5 ist mit einer zweiten Schaumstoffschicht 6 abgedeckt und diese wiederum mit einem Lederüberzug 7. Wie aus Figur 1 hervorgeht, in der im Bereich B sowohl der Lederüberzug als auch die zweite Schaumstoffschicht weggelassen worden ist, ist eine Vielzahl von piezoresistiven Sensoren 8 auf dem Umfang des Lenkkranzes 2 angeordnet. Die einzelnen Sensoren 8 sind über nicht dargestellte Leiterbahnen mit einer Auswerteeinheit 9 verbunden. Dieses Auswerteeinheit 9 ist in beispielsweise einer Lenkradspeiche 10 integriert. In the figure 1, the steering wheel of a motor vehicle is shown schematically and generally provided with the reference numeral 1. As can be seen in FIG. 2, which shows a section A-A from FIG. 1, the steering rim 2 has a first foam layer 4 arranged around the skeleton 3 of the steering rim 2. On this first foam layer 4, a film is arranged with piezoresistive sensors arranged close to each other, and provided with the reference numeral 5. The sensor layer 5 is covered with a second foam layer 6 and this in turn covered with a leather covering 7. As shown in Figure 1, in which both the leather cover and the second foam layer has been omitted in area B, a plurality of piezoresistive sensors 8 on the Circumference of the steering wheel 2 arranged. The individual sensors 8 are connected via printed conductors, not shown, to an evaluation unit 9. This evaluation unit 9 is integrated in, for example, a steering wheel spoke 10.
In der Figur 3 ist schematisch dargestellt, wie die regelmäßig angeordneten Sensoren 8 auf einem Substrat 1 1 angeordnet sind. Schematisch dargestellt ist auch die elektrische Verbindung 12 mit der Auswerteeinheit 9.
Die Figur 4 zeigt im Schnitt den Aufbau eines piezoresistiven Sensors 8. Auf einem Substrat 1 1 , das eine flexible Folie sein kann, sind Abstandhalter 13 aufgebracht, die eine piezoelektrische Schicht 14 tragen, wobei die Kontaktierungen 15 für die elektrischen Verbindungen 12 entweder an der piezoelektrischen Schicht 14 oder der Substratschicht 1 1 angeordnet sein können. Zwischen der piezoelektrischen Schicht 14 und der Subtratschicht 1 1 verbleibt somit ein Zwischenraum , in den bei Berührung die piezoelektrische Schicht 14 hineingedrückt werden kann, wodurch ein Signal erzeugt wird, das über die elektrischen Verbindungen 12 zur Auswerteeinheit 9 übertragen wird. FIG. 3 shows schematically how the regularly arranged sensors 8 are arranged on a substrate 11. Schematically illustrated is the electrical connection 12 with the evaluation unit. 9 On a substrate 1 1, which may be a flexible film, spacers 13 are applied, which carry a piezoelectric layer 14, wherein the contacts 15 for the electrical connections 12 either at the piezoelectric layer 14 or the substrate layer 1 1 can be arranged. Between the piezoelectric layer 14 and the substrate layer 1 1 thus remains a gap into which the piezoelectric layer 14 can be pressed in contact, whereby a signal is generated, which is transmitted via the electrical connections 12 to the evaluation unit 9.
Infolge der hohen Dichte der Sensoren 8 auf dem Substrat 1 1 ist eine hohe Ortsauflösung möglich, durch die bei einer streifenden Berührung nebeneinander liegender Sensoren 8 eine Gestenerkennung realisierbar ist. As a result of the high density of the sensors 8 on the substrate 1 1, a high spatial resolution is possible, by the gesture at a grazing touch adjacent sensors 8, a gesture recognition can be realized.
-Patentansprüche-
-Patentansprüche-
Claims
1 . Bedienelement, insbesondere in Kraftfahrzeugen, auf dessen Oberfläche druckempfindliche piezoresistive Sensoren zur Schaltung und Steuerung von kraftfahrzeuginternen Abläufen und Anwendungen aufgebracht sind, 1 . Operating element, in particular in motor vehicles, on the surface of which pressure-sensitive piezoresistive sensors for switching and controlling internal vehicle processes and applications are applied,
d a d u r c h g e k e n n z e i c h n e t, dass eine Vielzahl von piezoresistiven Sensoren (8) in einer Matrix in Zeilen und Spalten dicht an dicht auf einer Substratschicht (1 1 ) angeordnet ist, wobei die Substratschicht das gesamte Bedienelement (1 ) flächendeckend umgibt und die einzelnen Sensoren (8) über Leiterbahnen (12) mit einer Auswerteeinheit (9) verbunden sind, die die einzelnen Sensorsignale verarbeitet. characterized in that a plurality of piezoresistive sensors (8) in a matrix in rows and columns close to a dense substrate layer (1 1) is arranged, wherein the substrate layer, the entire control element (1) surrounds the area and the individual sensors (8) via Conductor tracks (12) are connected to an evaluation unit (9) which processes the individual sensor signals.
2. Bedienelement nach Anspruch 1 , dadurch gekennzeichnet, dass die piezoresistiven Sensoren (8) in Teilbereichen zu jeweils einer anwendungsspezifischen Gruppe zusammengefasst sind. 2. Operating element according to claim 1, characterized in that the piezoresistive sensors (8) are combined in subregions to each an application-specific group.
3. Bedienelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass, die die piezoresistiven Sensoren (8) tragende Substratschicht (1 1 ) zwischen einer auf dem Bedienelement (1 ) angeordneten ersten Schaumschicht (4) und einer zweiten Schaumschicht (6) angeordnet ist, welche von einer Schutzhülle (7) abgedeckt ist. 3. Operating element according to claim 1 or 2, characterized in that the piezoresistive sensors (8) carrying substrate layer (1 1) between a on the operating element (1) arranged first foam layer (4) and a second foam layer (6) is arranged , which is covered by a protective cover (7).
4. Bedienelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die piezoresistiven Sensoren (8) auf einem als flexible Folie ausgebildeten Substrat (1 1 ) angeordnet sind, derart, dass jeder Sensor (8) aus einer piezoresistiven Schicht (14) besteht, die oberhalb des Substrats (1 1 ) mittels Abstandhaltern (13) befestigt ist, wobei die Kontaktierungen (15) für
die Leiterbahnen (12) entweder am Substrat (1 1 ) oder an der piezoresistiven Schicht (14) angeordnet sind. 4. Operating element according to one of claims 1 to 3, characterized in that the piezoresistive sensors (8) are arranged on a formed as a flexible film substrate (1 1), such that each sensor (8) consists of a piezoresistive layer (14) which is above the substrate (1 1) by means of spacers (13) is fixed, wherein the contacts (15) for the conductor tracks (12) are arranged either on the substrate (1 1) or on the piezoresistive layer (14).
5. Bedienelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die einzelnen Sensoren (8) in parallel zueinander angeordneten Spalten und Zeilen angeordnet sind. 5. Operating element according to one of claims 1 to 4, characterized in that the individual sensors (8) are arranged in mutually parallel columns and rows.
6. Bedienelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass benachbarte Zeilen/Spalten aus versetzt zu einander angeordneten Sensoren (8) besteht. 6. Operating element according to one of claims 1 to 4, characterized in that adjacent rows / columns consists of offset to each other arranged sensors (8).
7. Bedienelement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass es sich um ein Lenkrad (1 ) handelt, bei dem zumindest der Lenkkranz (2) vollständig mit der piezoresistiven Sensorfolie umgeben ist. 7. Operating element according to one of claims 1 to 6, characterized in that it is a steering wheel (1), in which at least the steering rim (2) is completely surrounded with the piezoresistive sensor film.
8. Bedienelement nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Auswerteeinheit (9) im Bedienelement (1 ) selbst integriert ist. 8. Operating element according to one of claims 1 to 7, characterized in that the evaluation unit (9) in the operating element (1) itself is integrated.
9. Bedienelement nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Sensoren (8) derart ausgebildet und verschaltet sind, dass die Auswerteeinheit (9) bei entsprechender Berührung zwischen Greif- und Gestenerkennung unterscheidet. 9. Operating element according to one of claims 1 to 8, characterized in that the sensors (8) are designed and interconnected in such a way that the evaluation unit (9) differs with appropriate contact between gripping and gesture recognition.
-Zusammenfassung-
-Summary-
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201680063251.1A CN108292921A (en) | 2015-10-29 | 2016-10-27 | Operating element especially in automotive |
EP16798419.4A EP3369180A1 (en) | 2015-10-29 | 2016-10-27 | Operating element, particularly in motor vehicles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015118531.8 | 2015-10-29 | ||
DE102015118531.8A DE102015118531A1 (en) | 2015-10-29 | 2015-10-29 | Operating element, in particular in motor vehicles |
Publications (1)
Publication Number | Publication Date |
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WO2017072242A1 true WO2017072242A1 (en) | 2017-05-04 |
Family
ID=57354329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/075951 WO2017072242A1 (en) | 2015-10-29 | 2016-10-27 | Operating element, particularly in motor vehicles |
Country Status (4)
Country | Link |
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EP (1) | EP3369180A1 (en) |
CN (1) | CN108292921A (en) |
DE (1) | DE102015118531A1 (en) |
WO (1) | WO2017072242A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017216675A1 (en) | 2017-09-20 | 2019-03-21 | Bayerische Motoren Werke Aktiengesellschaft | Device and method for driving vehicle functions |
DE102017216674A1 (en) | 2017-09-20 | 2019-03-21 | Bayerische Motoren Werke Aktiengesellschaft | Device and method for driving vehicle functions |
DE102018202786A1 (en) | 2018-02-23 | 2019-08-29 | Bayerische Motoren Werke Aktiengesellschaft | Device and method for operating an automated mobile vehicle with a driver's operable steering handle |
DE102018202780A1 (en) | 2018-02-23 | 2019-08-29 | Bayerische Motoren Werke Aktiengesellschaft | Device and method for operating an at least partially automated mobile vehicle |
DE102018006914B4 (en) | 2018-08-30 | 2022-08-04 | CurveSYS GmbH | Areal force sensor unit |
DE202019106523U1 (en) | 2019-11-22 | 2019-12-17 | MöllerTech Engineering GmbH | Interior component, interior trim component and arrangement for a vehicle |
DE102020111405A1 (en) * | 2020-04-27 | 2021-10-28 | Tdk Electronics Ag | Control element and vehicle with control element |
DE102021108089A1 (en) | 2021-03-30 | 2022-10-06 | Bayerische Motoren Werke Aktiengesellschaft | Functional module for a vehicle interior paneling, interior paneling and motor vehicle |
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2015
- 2015-10-29 DE DE102015118531.8A patent/DE102015118531A1/en active Pending
-
2016
- 2016-10-27 CN CN201680063251.1A patent/CN108292921A/en active Pending
- 2016-10-27 WO PCT/EP2016/075951 patent/WO2017072242A1/en unknown
- 2016-10-27 EP EP16798419.4A patent/EP3369180A1/en not_active Withdrawn
Patent Citations (9)
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DE19927464A1 (en) | 1999-06-16 | 2000-12-21 | Volkswagen Ag | Steering wheel with key elements for operating electrically controlled devices in a motor vehicle uses piezoelectric pressure sensors acting as key elements. |
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Also Published As
Publication number | Publication date |
---|---|
CN108292921A (en) | 2018-07-17 |
DE102015118531A1 (en) | 2017-05-04 |
EP3369180A1 (en) | 2018-09-05 |
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