WO1989008952A1 - Anti-jamming device - Google Patents

Anti-jamming device Download PDF

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Publication number
WO1989008952A1
WO1989008952A1 PCT/AT1989/000028 AT8900028W WO8908952A1 WO 1989008952 A1 WO1989008952 A1 WO 1989008952A1 AT 8900028 W AT8900028 W AT 8900028W WO 8908952 A1 WO8908952 A1 WO 8908952A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
electrodes
evaluation circuit
fixed potential
capacitance
Prior art date
Application number
PCT/AT1989/000028
Other languages
German (de)
French (fr)
Inventor
Jiri Marek
Original Assignee
Setec Messgeräte Gesellschaft M.B.H.
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 Setec Messgeräte Gesellschaft M.B.H. filed Critical Setec Messgeräte Gesellschaft M.B.H.
Publication of WO1989008952A1 publication Critical patent/WO1989008952A1/en

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Classifications

    • 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
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/46—Detection using safety edges responsive to changes in electrical capacitance
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Application of doors, windows, wings or fittings thereof for vehicles characterised by the type of wing
    • E05Y2900/55—Windows

Definitions

  • the invention relates to a pinch protection for windows and doors with a capacitive sensor plate which is connected to a pole of an alternating current source which supplies a changing potential and which has its other pole with a fixed potential, e.g. Ground is connected, which encoder plate acts as an electrode and is isolated from parts which are at this fixed potential, electrically conductive and form a second electrode, and in which an intermediate electrode is provided which is connected to that through the encoder plate formed electrode, optionally connected via an amplifier and isolated from the parts connected to the fixed potential and forming the second electrode, an evaluation circuit responding to changes in capacitance being provided.
  • a capacitive sensor plate which is connected to a pole of an alternating current source which supplies a changing potential and which has its other pole with a fixed potential, e.g. Ground is connected, which encoder plate acts as an electrode and is isolated from parts which are at this fixed potential, electrically conductive and form a second electrode, and in which an intermediate electrode is provided which is connected to that through the encoder plate formed electrode, optionally connected via
  • Such protection was e.g. known from DE-OS 24 53 439.
  • the electrodes which are electrically connected to one another are held at a fixed mutual distance.
  • the evaluation circuit responds in the known case, in which at least two pairs of electrodes with an alternating voltage and intermediate electrodes must be present, to differences in the capacitance that each of the electrode pairs has against the electrode with the fixed potential. In practice, therefore, the evaluation circuit in the known case responds to asymmetries in the capacitance of the electrode pairs against the ground electrode.
  • this solution can only be used in rooms, but is not suitable, for example, as a pinch protection for electrically operated windows of vehicles.
  • different soiling in the area of the two electrode pairs can lead to asymmetries, which can lead to Faulty shutdowns.
  • This is particularly to be feared in the case of rain, since the wetting in the area of the two pairs of electrodes can be quite different, in particular during the journey, during which corresponding swirls can develop.
  • AT-PS 364 796 discloses a pinch protection in which two electrodes are also provided, which are connected to resonant circuits and interact with a common ground electrode.
  • the evaluation circuit responds to asymmetries in the capacitance of the two electrodes with respect to the ground electrode, so that this solution gives rise to the same problems as in the case described above.
  • the aim of the invention is to avoid these disadvantages and to propose a pinch protection of the type mentioned at the outset, which is insensitive to dirt and moisture and which is also suitable for use outdoors and in vehicles.
  • the changing electrodes can be moved relative to one another and the evaluation circuit only responds to changes in capacitance of the electrode connected to the fixed potential compared to the other two electrodes which are supplied with an alternating-voltage signal.
  • the solution according to the invention can also be installed in vehicles, for example for monitoring electrically operated window regulators.
  • one electrode is connected to the intermediate electrode via a non-inverting amplifier, preferably an operational amplifier.
  • the low impedance output of the amplifier is sensitive to capacitive or ohmic loads, e.g. insensitive to dirt and moisture, especially salt water. As a result, a retroactive effect on its input is largely avoided.
  • the AC voltage source is formed by a Schmittrigger gate with charge resistance and working capacity, which is formed by the capacitance of the transmitter plate and the intermediate electrode. This results in a particularly simple structure which can also be realized using conventional integrated components.
  • FIG. 1 and 2 schematically an embodiment of a pinch protection according to the invention in view and section.
  • the frame of the window 8 is provided with an electrically conductive layer serving as an electrode 1, which is arranged insulated from the rest of the body, which is connected as a mass 3.
  • This electrode 1 is connected directly to the output of an evaluation circuit 6 which contains a generator which supplies an AC voltage signal.
  • a further electrode 2 is arranged insulated from ground 3, which is connected via an amplifier 7 to the electrode 1 or the output of the evaluation circuit 6 is connected, the generator of which is connected to ground 3.
  • the space 5 lying between the two electrodes 1 and 2 is thus protected, the two electrodes 1 and 2 being movable relative to one another.
  • the two electrodes are acted upon by the amplifier 7, which is not absolutely necessary, with signals with the same frequency and phase position.
  • electrode 2 could also be connected directly to the evaluation circuit and electrode 1 via the amplifier to it.
  • auxiliary intermediate electrode 10 in the region of the electrode 1, insulated from it and from ground 3, which can also be connected to the output of the amplifier 7.
  • the capacitance of the electrode 1 against ground 3 does not change, which, as can be seen from FIG. 2, acts as the working capacity C of the Schmitt trigger S acting as a generator.
  • the output signal of the evaluation circuit 6 does not change, which is fed to a safety circuit, not shown, for example to interrupt the movement of the window 8 in the direction of the arrow 9.
  • the circuit trigger S is connected to a resistor R and the amplifier 7 is formed by an operational amplifier SF.

Abstract

An anti-jamming device for windows and doors comprises a capacitive sensing plate connected to one pole, which supplies a variable potential, of an alternating current source (S), the other pole of which is connected to a fixed potential, e.g. earth (3). The sensing plate acts as an electrode (1) and is insulated from electrically conductive parts connected to the fixed potential, which form a second electrode. An intermediate electrode (2) is connected to the electrode (1) formed by the sensing plate and insulated from the parts connected to the fixed potential which form the second electrode. An evaluation circuit (6) responds to the changes in capacitance. To render the anti-jamming device impervious to moisture and dirt, the two electrodes (1, 2) connected to the variable potential can be moved relative to each other and the evaluation circuit (6, 6') responds only to the changes in capacitance of the electrode (3) connected to the fixed potential with respect to the other two electrodes (1, 2), to which an equiphase alternating voltage signal is fed.

Description

E I N K L E M M S C H U T Z E I N K L E M M S C H U T Z
Die Erfindung bezieht sich auf einen Einklemmschutz für Fenster und Türen mit einer kapazitiven Geberplatte, die mit einem, ein sich änderndes Potential liefernden Pol einer Wech¬ selstromquelle verbunden ist, die mit ihrem anderen Pol mit einem festen Potential, z.B. Masse verbunden ist, welche Ge¬ berplatte als Elektrode wirkt und gegen an diesem festen Po¬ tential liegende, elektrisch leitende und eine zweite Elek¬ trode bildende Teile isoliert angeordnet ist und bei dem eine Zwischenelektrode vorgesehen ist, die mit der durch die Geber- platte gebildeten Elektrode, gegebenenfalls über einen Ver¬ stärker verbunden und gegen die mit dem festen Potential ver¬ bundenen, die zweite Elektrode bildenden Teile isoliert ange¬ ordnet ist, wobei eine auf Kapazitätsänderungen ansprechende Auswerteschaltung vorgesehen ist.The invention relates to a pinch protection for windows and doors with a capacitive sensor plate which is connected to a pole of an alternating current source which supplies a changing potential and which has its other pole with a fixed potential, e.g. Ground is connected, which encoder plate acts as an electrode and is isolated from parts which are at this fixed potential, electrically conductive and form a second electrode, and in which an intermediate electrode is provided which is connected to that through the encoder plate formed electrode, optionally connected via an amplifier and isolated from the parts connected to the fixed potential and forming the second electrode, an evaluation circuit responding to changes in capacitance being provided.
Ein solcher Schutz wurde z.B. durch die DE-OS 24 53 439 be¬ kannt. Bei dieser bekannten Lösung sind die miteinander elek¬ trisch verbundenen Elektroden in einem festen gegenseitigen Abstand gehalten. Außerdem spricht die Auswerteschaltung im bekannten Falle, bei dem grundsätzlich zumindest zwei Paare von mit WechselSpannung beaufschlagten Elektroden und Zwischenelektroden vorhanden sein müssen, auf Unterschiede der Kapazität an, die jedes der Elektrodenpaare gegen die mit fes¬ tem Potential beaufschlagte Elektrode aufweist. Praktisch spricht daher die Auswerteschaltung im bekannten Falle auf Un- sym etrien der Kapazität der Elektrodenpaare gegen die Mas¬ seelektrode an.Such protection was e.g. known from DE-OS 24 53 439. In this known solution, the electrodes which are electrically connected to one another are held at a fixed mutual distance. In addition, the evaluation circuit responds in the known case, in which at least two pairs of electrodes with an alternating voltage and intermediate electrodes must be present, to differences in the capacitance that each of the electrode pairs has against the electrode with the fixed potential. In practice, therefore, the evaluation circuit in the known case responds to asymmetries in the capacitance of the electrode pairs against the ground electrode.
Dabei ergibt sich jedoch der Nachteil, daß diese Lösung nur in Räumen verwendbar ist, nicht aber z.B. als Einklemmschutz für elektrisch betriebene Fenster von Fahrzeugen geeignet ist. So kann es z.B. durch unterschiedliche Verschmutzung im Bereich der beiden Elektrodenpaare zu Unsymmetrien kommen, die zu Fehlabschaltungen führen können. Dies ist insbesondere bei Re¬ gen zu befürchten, da die Benetzung im Bereich der beiden Paare von Elektroden durchaus unterschiedlich sein kann, ins¬ besondere während der Fahrt, bei der es zur Ausbildung ent¬ sprechender Verwirbelungen kommen kann. In letzterem Falle führt auch die Anordnung einer Schaltung zum selbsttätigen Ab¬ gleich der Auswerteschaltung, der z.B. bei geöffnetem Fenster erfolgen kann, nicht zum Erfolg, da sich die Verhältnisse rasch ändern können und es daher während des Schließens des Fenster durch ungleiche Benetzung durch den Regen zu Unsymme- trien kommen kann, die zu einem Ansprechen der Auswerteschal¬ tung und damit zu einer Stillsetzung des Fensterantriebes füh¬ ren können.However, there is the disadvantage that this solution can only be used in rooms, but is not suitable, for example, as a pinch protection for electrically operated windows of vehicles. For example, different soiling in the area of the two electrode pairs can lead to asymmetries, which can lead to Faulty shutdowns. This is particularly to be feared in the case of rain, since the wetting in the area of the two pairs of electrodes can be quite different, in particular during the journey, during which corresponding swirls can develop. In the latter case, the arrangement of a circuit for automatic adjustment of the evaluation circuit, which can take place, for example, when the window is open, does not lead to success, since the conditions can change quickly and therefore it occurs during the closing of the window due to uneven wetting due to the rain can lead to asymmetries which can lead to the evaluation circuit responding and thus to a shutdown of the window drive.
Weiters wurde durch die AT-PS 364 796 ein Einklemmschutz be¬ kannt, bei dem ebenfalls zwei Elektroden vorgesehen sind, die mit Schwingkreisen in Verbindung stehen und mit einer gemein¬ samen Masseelektrode zusammenwirken. Auch bei dieser Lösung spricht die Auswerteschaltung auf Unsymmetrien der Kapazität der beiden Elektroden gegenüber der Masseelektrode an, sodaß sich bei dieser Lösung die gleichen Probleme ergeben, wie im zuvor beschriebenen Fall.Furthermore, AT-PS 364 796 discloses a pinch protection in which two electrodes are also provided, which are connected to resonant circuits and interact with a common ground electrode. In this solution, too, the evaluation circuit responds to asymmetries in the capacitance of the two electrodes with respect to the ground electrode, so that this solution gives rise to the same problems as in the case described above.
Weiters ergibt sich bei diesen Lösungen auch noch der Nach¬ teil, daß bei diesen in der Regel zwei Elektrodenanordnungen erforderlich sind, wodurch ein entsprechend aufwendiger elek- tromechanischer Aufbau erforderlich ist. Außerdem ergeben sich dadurch auch Stellen, in denen die Einrichtung auf sich nähernde Hindernisse nicht reagiert. Dies trifft insbesondere für den Symmetriepunkt der Einrichtung zu und bei einander an¬ nähernden Teilen mit komplizierter geometrischer Form, wie z.B. den Fenstern von Fahrzeugen, ergeben sich goße Probleme mit dem Abgleich der Auswerteschaltung, da sich das Signal bei solchen Formen nichtlinear mit der Entfernung der Teile von¬ einander ändert.Furthermore, these solutions also have the disadvantage that, as a rule, two electrode arrangements are required in these solutions, as a result of which a correspondingly complex electromechanical structure is required. This also results in places where the facility does not respond to approaching obstacles. This is particularly true for the point of symmetry of the device and for parts approaching one another with a complicated geometric shape, such as the windows of vehicles, there are great problems with the adjustment of the evaluation circuit, since the signal changes in such a way nonlinearly with the distance of the parts from one another.
Ziel der Erfindung ist es, diese Nachteile zu vermeiden und einen Einklemmschutz der eingangs erwähnten Art vorzuschlagen, der unempfindlich gegen Verschmutzungen und Feuchtigkeit ist und der sich auch für einen Einsatz im Freien und bei Fahrzeu¬ gen eignet . r n ungs em w , dem sich ändernden Potential liegenden Elektroden relativ zu¬ einander bewegbar sind und die Auswerteschaltung lediglich auf Kapazitätsänderungen der mit dem festen Potential verbundenen Elektrode gegenüber den beiden anderen mit einem gleichphasi¬ gen Wechselspannungssignal beaufschlagten Elektroden an¬ spricht .The aim of the invention is to avoid these disadvantages and to propose a pinch protection of the type mentioned at the outset, which is insensitive to dirt and moisture and which is also suitable for use outdoors and in vehicles. The changing electrodes can be moved relative to one another and the evaluation circuit only responds to changes in capacitance of the electrode connected to the fixed potential compared to the other two electrodes which are supplied with an alternating-voltage signal.
Durch diese Maßnahmen ist sichergestellt, daß sich Umweltein¬ flüsse, wie Verschmutzungen oder Feuchtigkeit auf beide Elek¬ troden in gleicher Weise auswirken und z.B. durch Verschmut¬ zungen bedingte Änderungen der Kapazität zwischen lediglich zwei Elektroden keine Auswirkungen auf das Ausgangssignal der Auswerteschaltung haben. Dadurch kann die erfindungsgemäße Lö¬ sung auch in Fahrzeuge eingebaut werden, etwa zur Überwachung elektrisch betriebener Fensterheber.These measures ensure that environmental influences, such as dirt or moisture, have the same effect on both electrodes and e.g. Changes in the capacitance between only two electrodes due to contamination have no effect on the output signal of the evaluation circuit. As a result, the solution according to the invention can also be installed in vehicles, for example for monitoring electrically operated window regulators.
Nach einem weiteren Merkmal der Erfindung kann vorgesehen sein, daß die eine Elektrode mit der Zwischenelektrode über einen nicht-invertierenden Verstärker, vorzugsweise einen Ope¬ rationsverstärker verbunden ist.According to a further feature of the invention it can be provided that one electrode is connected to the intermediate electrode via a non-inverting amplifier, preferably an operational amplifier.
Der Niederimpedanzausgang des Verstärkers ist auf kapazitive oder ohm'sche Belastungen, z.B. durch Schmutz und Feuchtig¬ keit, insbesondere Salzwasser unempfindlich. Dadurch wird auch eine Rückwirkung auf seinen Eingang weitgehend vermieden.The low impedance output of the amplifier is sensitive to capacitive or ohmic loads, e.g. insensitive to dirt and moisture, especially salt water. As a result, a retroactive effect on its input is largely avoided.
Außerdem ist dadurch auch sichergestellt, daß die Umrißform z.B. des Rahmens und des Glases von Fahrzeugfenstern keinen merklichen Einfluß auf die Funktion des Einklemmschutzes auf¬ weist.This also ensures that the outline shape e.g. the frame and the glass of vehicle windows has no noticeable influence on the function of the pinch protection.
Eine in konstruktiver Heinsicht sehr einfache Lösung ergibt sich, wenn die Auswerteschaltung in die Wechselspannungsquelle integriert ist und die Auswertung über eine Änderung der Fre¬ quenz der Wechselspannungsquelle erfolgt, wodurch sich der schaltungstechnische Aufwand gering halten läßt.A solution that is very simple in terms of design results if the evaluation circuit is integrated in the AC voltage source and the evaluation is carried out by changing the frequency of the AC voltage source, as a result of which the circuitry complexity can be kept low.
In diesem Zusammenhang kann weiters vorgesehen sein, daß die Wechselspannungsquelle durch ein Schmittriggergatter mit La¬ dungswiderstand und Arbeitskapazität gebildet ist, die durch die Kapazität der Geberplatte und der Zwischenelektrode gebil¬ det ist. Dadurch ergibt sich ein besonders einfacher Aufbau der auch durch herkömmliche integrierte Bauteile realisiert werden kann.In this context, it can further be provided that the AC voltage source is formed by a Schmittrigger gate with charge resistance and working capacity, which is formed by the capacitance of the transmitter plate and the intermediate electrode. This results in a particularly simple structure which can also be realized using conventional integrated components.
Die Erfindung wird nun anhand der Zeichnung näher erläutert, dabei zeigen:The invention will now be explained in more detail with reference to the drawing, which show:
Fig. 1 und 2 schematisch eine Ausführungsfor eines er¬ findungsgemäßen Einklemmschutzes in Ansicht und Schnitt.1 and 2 schematically an embodiment of a pinch protection according to the invention in view and section.
Bei der dargestellten Ausführungsform eines erfindungsgemäßen Einklemmschutzes für ein Fahrzeugfenster ist der Rahmen des Fensters 8 mit einer als Elektrode 1 dienenden elektrisch lei¬ tenden Schichte versehen, die gegenüber der übrigen, als Masse 3 geschalteten Karosserie isoliert angeordnet ist. Diese Elektrode 1 ist direkt mit dem Ausgang einer Auswerteschal¬ tung 6 verbunden, die einen ein Wechselspannungssignal lie¬ fernden Generator enthält.In the embodiment of a pinch protection for a vehicle window according to the invention, the frame of the window 8 is provided with an electrically conductive layer serving as an electrode 1, which is arranged insulated from the rest of the body, which is connected as a mass 3. This electrode 1 is connected directly to the output of an evaluation circuit 6 which contains a generator which supplies an AC voltage signal.
An der dem mit der Elektrode 1 versehenen Rahmenteil zugekehr¬ ten Stirnfläche der Fensterscheibe 8 ist eine weitere Elek¬ trode 2 gegen Masse 3 isoliert angeordnet, die über einen Ver¬ stärker 7 mit der Elektrode 1, bzw. dem Ausgang der Auswerte¬ schaltung 6 verbunden ist, deren Generator mit Masse 3 verbun¬ den ist. Damit ist der zwischen den beiden Elektroden 1 und 2 liegende Raum 5 geschützt, wobei die beiden Elektroden 1 und 2 gegeneinander beweglich sind.On the end face of the window pane 8 facing the frame part provided with the electrode 1, a further electrode 2 is arranged insulated from ground 3, which is connected via an amplifier 7 to the electrode 1 or the output of the evaluation circuit 6 is connected, the generator of which is connected to ground 3. The space 5 lying between the two electrodes 1 and 2 is thus protected, the two electrodes 1 and 2 being movable relative to one another.
Die beiden Elektroden werden über den Verstärker 7, der nicht unbedingt erforderlich ist, mit Signalen mit gleicher Frequenz und Phasenlage beaufschlagt.The two electrodes are acted upon by the amplifier 7, which is not absolutely necessary, with signals with the same frequency and phase position.
Grundsätzlich ist auch ein gegenseitiger Austausch der beiden Elektroden 1, 2 möglich, d.h., daß auch die Elektrode 2 direkt mit der Auswerteschaltung und die Elektrode 1 über den Ver¬ stärker mit dieser verbunden sein könnte.In principle, mutual exchange of the two electrodes 1, 2 is also possible, i.e. electrode 2 could also be connected directly to the evaluation circuit and electrode 1 via the amplifier to it.
In der Fig. 2 ist strichliert auch die Möglichkeit angedeutet, im Bereich der Elektrode 1 isoliert von dieser und von Masse 3 eine Hilfszwischenelektrode 10 vorzusehen, die ebenfalls mit dem Ausgang des Verstärkers 7 verbunden sein kann.2 also indicates the possibility of providing an auxiliary intermediate electrode 10 in the region of the electrode 1, insulated from it and from ground 3, which can also be connected to the output of the amplifier 7.
Beim Schließen des Fensters 8, ohne daß sich zwischen den bei¬ den Elektroden 1, 2 ein Hindernis 4, z.B. eine Hand befindet, ändert sich die Kapazität der Elektrode 1 gegen Masse 3 nicht, die, wie aus der Fig. 2 zu ersehen ist, als Arbeitskapazität C des als Generator wirkenden Schmitt-Triggers S wirkt. Damit ändert sich auch das Ausgangssignal der Auswerteschal ung 6 nicht, das einer nicht dargestellten Sicherheitsschaltung, z.B. zur Unterbrechung der Bewegung des Fensters 8 in Richtung des Pfeiles 9 zugeführt wird.When the window 8 is closed without there being an obstacle 4, for example a hand, between the two electrodes 1, 2, the capacitance of the electrode 1 against ground 3 does not change, which, as can be seen from FIG. 2, acts as the working capacity C of the Schmitt trigger S acting as a generator. Thus, the output signal of the evaluation circuit 6 does not change, which is fed to a safety circuit, not shown, for example to interrupt the movement of the window 8 in the direction of the arrow 9.
Dringt jedoch in den Raum 5 zwischen den Elektroden 1, 2 ein Hindernis 4, z.B. eine Hand ein, so ändert sich die Kapazität der Elektrode 1 gegen Masse 3 und damit auch die Arbeitskapa¬ zität des Schmitt-Triggers S der Auswerteschaltung 6, wodurch sich die Frequenz deren Ausgangssignales vom Ausgang 6' än¬ dert, das entsprechend weiter ausgewertet werden kann.However, if an obstacle 4 penetrates into the space 5 between the electrodes 1, 2, e.g. If one hand changes, the capacitance of the electrode 1 changes to ground 3 and thus also the working capacity of the Schmitt trigger S of the evaluation circuit 6, as a result of which the frequency of its output signals from the output 6 'changes, which are further evaluated accordingly can.
Wie aus der Fig. 2 zu ersehen ist, ist der SCh itt-Trigger S mit einem Widerstand R beschaltet und der Verstärker 7 durch einen Operationsverstärker SF gebildet.As can be seen from FIG. 2, the circuit trigger S is connected to a resistor R and the amplifier 7 is formed by an operational amplifier SF.
Eine Verschmutzung der Elektroden 1, 2 oder ein Eindringen von Wasser zwischen diese Elektroden bewirkt zwar eine Änderung der zwischen diesen herrschenden Kapazität, doch führt dies nicht zu einer Änderung des Ausgangssignales der Auswerte¬ schaltung am Ausgang 6', da sich dieses, wie bereits erwähnt lediglich bei einer Änderung der Kapazität der Elektrode 1 ge¬ gen Masse 3 ändert . Contamination of the electrodes 1, 2 or penetration of water between these electrodes causes a change in the capacitance between them, but this does not lead to a change in the output signal of the evaluation circuit at the output 6 ', since, as already mentioned, this changes changes only with a change in the capacitance of the electrode 1 against the mass 3.

Claims

P A T E N T A N S P R Ü C H E PATENT CLAIMS
1. Einklemmschutz für Fenster und Türen mit einer kapazitiven Geberplatte, die mit einem, ein sich änderndes Potential liefernden Pol einer Wechselstromquelle (S) verbunden ist, die mit ihrem anderen Pol mit einem festen Potential, z.B. Masse (3) verbunden ist, welche Geberplatte als Elek¬ trode (1) wirkt und gegen an diesem festen Potential lie¬ gende, elektrisch leitende und eine zweite Elektrode bil¬ dende Teile isoliert angeordnet ist und bei dem eine Zwischenelektrode (2) vorgesehen ist, die mit der durch die Geberplatte gebildeten Elektrode (1) , gegebenenfalls über einen Verstärker (7) verbunden und gegen die mit dem festen Potential verbundenen, die zweite Elektrode bilden¬ den Teile isoliert angeordnet ist, wobei eine auf Kapazitätsänderungen ansprechende Auswerteschaltung (6) vorgesehen ist, dadurch gekennzeichnet, daß die beiden an dem sich ändernden Potential liegenden Elektroden (1, 2) relativ zueinander bewegbar sind und die Auswerteschaltung (6, 6') lediglich auf Kapazitätsän¬ derungen der mit dem festen Potential verbundenen Elek¬ trode (3) gegenüber den beiden anderen mit einem gleichphasigen Wechselspannungssignal beaufschlagten Elektroden (1, 2) anspricht.1. Pinch protection for windows and doors with a capacitive sensor plate which is connected to one pole of an alternating current source (S) which supplies a changing potential and which is connected to its other pole with a fixed potential, e.g. Ground (3) is connected, which transmitter plate acts as an electrode (1) and is isolated from parts which are at this fixed potential, electrically conductive and form a second electrode, and in which an intermediate electrode (2) is provided , which is connected to the electrode (1) formed by the transmitter plate, optionally via an amplifier (7) and is isolated from the parts forming the second electrode and connected to the fixed potential, an evaluation circuit (6) responding to changes in capacitance. is provided, characterized in that the two electrodes (1, 2) lying at the changing potential can be moved relative to one another and the evaluation circuit (6, 6 ') only on changes in capacitance of the electrode (3 ) responds to the other two electrodes (1, 2) with an in-phase AC voltage signal.
2. Einklemmschutz nach Anspruch 1, dadurch gekennzeichnet, daß die eine Elektrode (1) mit der Zwischenelektrode (2) über einen nicht-invertierenden Verstärker, vorzugsweise einen Operationsverstärker (7') verbunden ist.2. Pinch protection according to claim 1, characterized in that the one electrode (1) with the intermediate electrode (2) via a non-inverting amplifier, preferably an operational amplifier (7 ') is connected.
3. Einklemmschutz nach Anspruch 1 oder 2, dadurch gekennze ehnet, daß die Auswerteschaltung in die Wechselspannungsquel¬ le (6') integriert ist und die Auswertung über eine Ände¬ rung der Frequenz der Wechselspannungsquelle erfolgt. 3. Pinch protection according to claim 1 or 2, characterized in that the evaluation circuit is integrated into the AC voltage source (6 ') and the evaluation is carried out by changing the frequency of the AC voltage source.
4. Einklemmschutz nach Anspruch 3, dadurch gekennzeichnet, daß die Wechselspannungsquelle (6') durch ein Schmittrig- gergatter (S) mit Ladungswiderstand (R) und Arbeits¬ kapazität gebildet ist, die durch die Kapazität der Geber¬ platte (1') und der Zwischenelektrode (2') gebildet ist. 4. Pinch protection according to claim 3, characterized in that the AC voltage source (6 ') is formed by a Schmittrig- gate (S) with charge resistance (R) and Arbeits¬ capacity, which by the capacity of the Geber¬ plate (1') and the intermediate electrode (2 ') is formed.
PCT/AT1989/000028 1988-03-18 1989-03-14 Anti-jamming device WO1989008952A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA732/88 1988-03-18
AT0073288A AT391913B (en) 1988-03-18 1988-03-18 PINCH PROTECTION FOR WINDOWS AND DOORS

Publications (1)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004353A1 (en) * 1990-02-13 1991-08-14 Brose Fahrzeugteile Finger protection for motorised sliding roof or window in vehicle - using microprocessor operating on signals from detectors of wing drive position and approach of moving wing
US5074073A (en) * 1990-10-17 1991-12-24 Zwebner Ascher Z Car door safety device
US6157024A (en) * 1999-06-03 2000-12-05 Prospects, Corp. Method and apparatus for improving the performance of an aperture monitoring system
US6169379B1 (en) 1995-05-05 2001-01-02 Prospects Corporation Power driven venting of a vehicle
US6305123B1 (en) * 1999-09-17 2001-10-23 Meritor Light Vehicle Systems, Llc Obstruction sensing a signal transmitted across window
US6337549B1 (en) 2000-05-12 2002-01-08 Anthony Gerald Bledin Capacitive anti finger trap proximity sensor
US6693273B1 (en) 2000-05-02 2004-02-17 Prospects, Corp. Method and apparatus for monitoring a powered vent opening with a multifaceted sensor system
WO2006031185A1 (en) 2004-09-17 2006-03-23 Electrolux Home Products Corporation N.V. Capacitive sensor system
US7038414B2 (en) 2000-08-03 2006-05-02 Atoma International Corp. Vehicle closure anti-pinch assembly having a non-contact sensor
US20110041409A1 (en) * 2009-08-21 2011-02-24 Nartron Corporation Vehicle Assemblies Having Fascia Panels with Capacitance Sensors Operative for Detecting Proximal Objects
US8436628B2 (en) 2006-03-17 2013-05-07 Electrolux Home Products Corporation N.V. Door position sensor
US9051769B2 (en) 2009-08-21 2015-06-09 Uusi, Llc Vehicle assembly having a capacitive sensor
US9199608B2 (en) 2009-08-21 2015-12-01 Uusi, Llc Keyless entry assembly having capacitance sensor operative for detecting objects
US9575481B2 (en) 2009-08-21 2017-02-21 Uusi, Llc Fascia panel assembly having capacitance sensor operative for detecting objects
US9845629B2 (en) 2009-08-21 2017-12-19 Uusi, Llc Vehicle keyless entry assembly having capacitance sensor operative for detecting objects
US10017977B2 (en) 2009-08-21 2018-07-10 Uusi, Llc Keyless entry assembly having capacitance sensor operative for detecting objects
US10954709B2 (en) 2009-08-21 2021-03-23 Uusi, Llc Vehicle assembly having a capacitive sensor
US11634937B2 (en) 2009-08-21 2023-04-25 Uusi, Llc Vehicle assembly having a capacitive sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389568A1 (en) * 1977-05-04 1978-12-01 Maschf Augsburg Nuernberg Ag
WO1986002506A2 (en) * 1984-10-15 1986-04-24 Memco-Med Limited Automatic control using proximity sensors
DE3521004A1 (en) * 1985-06-12 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Control arrangement for an electric-motor drive
DE3527405A1 (en) * 1985-07-31 1987-02-12 Bosch Gmbh Robert Device for preventing persons from being jammed in motively closable apertures in motor vehicles
FR2599013A1 (en) * 1986-05-26 1987-11-27 Kone Elevator Gmbh SAFETY DEVICE FOR ELEVATOR DOOR.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI53294C (en) * 1973-11-13 1978-04-10 Kone Oy CAPACITIVE SENSOR FOR AUTOMATIC DOERRAR
DE3509507A1 (en) * 1984-03-17 1985-09-19 Sartorius GmbH, 3400 Göttingen Circuit arrangement for a differential-capacitor-type measurement pick up
DE3516162A1 (en) * 1985-05-06 1985-10-31 Haberland, Rüdiger, Prof. Dr.-Ing., 6750 Kaiserslautern Evaluating electronics for differential capacitors for use in sensors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389568A1 (en) * 1977-05-04 1978-12-01 Maschf Augsburg Nuernberg Ag
WO1986002506A2 (en) * 1984-10-15 1986-04-24 Memco-Med Limited Automatic control using proximity sensors
DE3521004A1 (en) * 1985-06-12 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Control arrangement for an electric-motor drive
DE3527405A1 (en) * 1985-07-31 1987-02-12 Bosch Gmbh Robert Device for preventing persons from being jammed in motively closable apertures in motor vehicles
FR2599013A1 (en) * 1986-05-26 1987-11-27 Kone Elevator Gmbh SAFETY DEVICE FOR ELEVATOR DOOR.

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004353A1 (en) * 1990-02-13 1991-08-14 Brose Fahrzeugteile Finger protection for motorised sliding roof or window in vehicle - using microprocessor operating on signals from detectors of wing drive position and approach of moving wing
US5074073A (en) * 1990-10-17 1991-12-24 Zwebner Ascher Z Car door safety device
US6169379B1 (en) 1995-05-05 2001-01-02 Prospects Corporation Power driven venting of a vehicle
US6157024A (en) * 1999-06-03 2000-12-05 Prospects, Corp. Method and apparatus for improving the performance of an aperture monitoring system
US6305123B1 (en) * 1999-09-17 2001-10-23 Meritor Light Vehicle Systems, Llc Obstruction sensing a signal transmitted across window
US6693273B1 (en) 2000-05-02 2004-02-17 Prospects, Corp. Method and apparatus for monitoring a powered vent opening with a multifaceted sensor system
US6337549B1 (en) 2000-05-12 2002-01-08 Anthony Gerald Bledin Capacitive anti finger trap proximity sensor
US7038414B2 (en) 2000-08-03 2006-05-02 Atoma International Corp. Vehicle closure anti-pinch assembly having a non-contact sensor
WO2006031185A1 (en) 2004-09-17 2006-03-23 Electrolux Home Products Corporation N.V. Capacitive sensor system
AU2005285525B2 (en) * 2004-09-17 2010-06-10 Electrolux Home Products Corporation N.V. Capacitive sensor system
US8049518B2 (en) 2004-09-17 2011-11-01 Electrolux Home Products Corporation N.V. Capacitive sensor system
CN101044680B (en) * 2004-09-17 2012-05-23 伊莱克斯家用产品股份有限公司 Capacitive sensor system
US8436628B2 (en) 2006-03-17 2013-05-07 Electrolux Home Products Corporation N.V. Door position sensor
US20110041409A1 (en) * 2009-08-21 2011-02-24 Nartron Corporation Vehicle Assemblies Having Fascia Panels with Capacitance Sensors Operative for Detecting Proximal Objects
US9051769B2 (en) 2009-08-21 2015-06-09 Uusi, Llc Vehicle assembly having a capacitive sensor
US9199608B2 (en) 2009-08-21 2015-12-01 Uusi, Llc Keyless entry assembly having capacitance sensor operative for detecting objects
US9575481B2 (en) 2009-08-21 2017-02-21 Uusi, Llc Fascia panel assembly having capacitance sensor operative for detecting objects
US9705494B2 (en) 2009-08-21 2017-07-11 Uusi, Llc Vehicle assemblies having fascia panels with capacitance sensors operative for detecting proximal objects
US9797179B2 (en) 2009-08-21 2017-10-24 Uusi, Llc Vehicle assembly having a capacitive sensor
US9845629B2 (en) 2009-08-21 2017-12-19 Uusi, Llc Vehicle keyless entry assembly having capacitance sensor operative for detecting objects
US10017977B2 (en) 2009-08-21 2018-07-10 Uusi, Llc Keyless entry assembly having capacitance sensor operative for detecting objects
US10954709B2 (en) 2009-08-21 2021-03-23 Uusi, Llc Vehicle assembly having a capacitive sensor
US11634937B2 (en) 2009-08-21 2023-04-25 Uusi, Llc Vehicle assembly having a capacitive sensor

Also Published As

Publication number Publication date
JPH03500598A (en) 1991-02-07
AT391913B (en) 1990-12-27
ATA73288A (en) 1990-06-15
EP0359797A1 (en) 1990-03-28

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