EP2250945A1 - Roller blind cabinet - Google Patents

Roller blind cabinet Download PDF

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Publication number
EP2250945A1
EP2250945A1 EP10160878A EP10160878A EP2250945A1 EP 2250945 A1 EP2250945 A1 EP 2250945A1 EP 10160878 A EP10160878 A EP 10160878A EP 10160878 A EP10160878 A EP 10160878A EP 2250945 A1 EP2250945 A1 EP 2250945A1
Authority
EP
European Patent Office
Prior art keywords
roller shutter
cabinet
guide rails
mat
sensor surface
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
EP10160878A
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German (de)
French (fr)
Other versions
EP2250945B1 (en
Inventor
Jens Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knoke Beschlagtechnik GmbH
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Knoke Beschlagtechnik GmbH
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Publication of EP2250945A1 publication Critical patent/EP2250945A1/en
Application granted granted Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0469—Details, e.g. night covers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/002—Devices for protection against sunlight or theft
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/115—Roller shutters specially adapted for furniture

Definitions

  • the present invention relates to a roller shutter cabinet according to the preamble of claim 1.
  • a roller shutter mat is driven by an electric drive, which is controlled by a control circuit.
  • a control circuit To open or close the shutter cabinet, a user actuates a switch placed on the outside of the furniture body.
  • the drive is controlled so that the roller shutter mat 3 is moved to an open position of the roller shutter cabinet or in a closed position of the roller shutter cabinet.
  • Guide rails and possibly also the Rolllademnatte are made to increase the wear resistance or stability reasons of metal.
  • roller shutter cabinet A disadvantage of such a roller shutter cabinet is that, depending on the positioning of the switch for actuating the drive, the roller shutter cabinet must be positioned so that a user can reach the switch.
  • Object of the present invention is to provide a roller shutter cabinet, in which an actuation of the drive is facilitated.
  • the part of the roller shutter mat and of the guide rails consisting of an electrically conductive material is designed as a capacitive sensor surface which is coupled to the control circuit for controlling the electric drive.
  • the control circuit has a semiconductor switch.
  • semiconductor switches for example in the form of a microcontroller, are inexpensive electronic components with which a digital evaluation of the sensor signals is made possible and which can be realized as far as possible adaptation to different environmental conditions.
  • the semiconductor switch has a reference signal generator, in particular for generating a pulse-width-modulated (PWM) sine signal, a control input, a signal output and an evaluation unit.
  • the evaluation unit has in particular a digital lock-in amplifier, with the interference signals can be effectively suppressed.
  • the sensor surface is coupled according to a preferred embodiment via an analog bandpass filter with the control input of the semiconductor switch and the reference signal generator is coupled via an analog low-pass filter with the sensor surface and the bandpass filter.
  • an analog / digital converter is provided behind the control input, viewed in the signal travel direction.
  • a post-amplifier is provided in the signal direction before the control input. This is particularly preferably controlled by the semiconductor switch.
  • FIG. 1 shows a roller shutter cabinet, the open front 2 is closed in a conventional manner by a roller shutter mat 3.
  • the Rolllademnatte 3 consists of a plurality of mutually parallel slats 4, the roller shutter mat 3 is guided in lateral guide rails 6 of the furniture body of the roller shutter cabinet 1.
  • the guide rails 6, in particular at least part of the front face 2 of the roller shutter cabinet 1 facing front surface 5 of the guide rails 6 and / or at least a portion of the roller shutter mat 3 are made of an electrically conductive material, such as a metal sheet.
  • roller shutter mat in the guide rails 6 is effected by an electric drive 7 (not shown here), which is preferably arranged in the interior of the roller shutter cabinet 1 or on a rear side of the roller shutter cabinet 1 and can be operated via a mains connection or accumulators.
  • the electric drive 7 is connected to a control circuit 8 controlling the drive 7.
  • the part of the roller shutter mat 3 and / or of the guide rails 6 consisting of the electrically conductive material is designed as a capacitive sensor surface 22, which is coupled to the control circuit 8.
  • a capacitive sensor surface By forming such a capacitive sensor surface, a user can bring about a movement of the roller shutter mat 3 simply by touching the sensor surface.
  • a mere approximation of an electrically conductive body or the approach of a body with a high dielectric constant to the sensor surface also suffice. The contact or approach of such a body increases the capacitance of the sensor surface, the changes of which can be evaluated and converted into a command signal for the electric drive.
  • FIG. 2 an embodiment of a control circuit 8 is shown with which such a signal detection and evaluation can be made.
  • the central component of the control circuit 8 is a semiconductor switch 12, which is preferably designed as a microcontroller with an evaluation software.
  • This microcontroller has a reference signal generator 13, which preferably generates a pulse-width-modulated sinusoidal signal, which emerges from a signal output 15 from the semiconductor switch 12 and an analog low-pass filter 17 frequency and level stable as an analog output signal with high spectral purity, ie with low harmonic content back is won.
  • a series resistor 18 is provided behind the low-pass filter. Behind this series resistor, the outgoing signal from the sensor surface 22 is coupled into the circuit.
  • the capacitance of the sensor surface 22 changes from a basic capacity 11 to a contact capacitance 10 by touching or approaching, for example, a finger of a user 9.
  • the output signal superposed with the sensor signal is subsequently stirred via a bandpass filter 19.
  • This bandpass filter 19 essentially passes only the desired sensor signal and suppresses both the lower and higher noise frequencies. Deeper interference frequencies arise, for example, due to a technical alternating current (so-called mains humming), which can couple into the sensor surface 22. Higher interference frequencies are, for example, high-frequency signals, which can also couple into the sensor surface 22.
  • a variable post-amplification 20 is preferably provided behind the band-pass filter 19, which is preferably controlled by the microcontroller 12.
  • the analog prefiltered and amplitude adjusted signal is then converted into a digital signal via an analog / digital converter 24 integrated in the semiconductor switch 12.
  • This analog / digital converter 24 is provided in the signal travel direction behind the control input 16 of the semiconductor switch 12.
  • the digital signal is then evaluated using the software and a digital lock-in amplifier 14.
  • the amplitude of the signal is initially determined with the aid of the lock-in amplifier 14 by phase-independent synchronous rectification, whereby further portions of interference signals are suppressed.
  • the required averaging is preferably made over twice the mains frequency period, which corresponds to a mains frequency of 50 Hz a period of 40 milliseconds, ie two whole periods of the mains frequency of 20 milliseconds.
  • residual components of the 50 Hz mains frequency can also be suppressed via the comb filter effect. From the obtained amplitude information in this manner nation n operating filter with a time constant of some seconds a so-called.
  • Ennittelt background is a very dying slowly l, which serves as a reference amplitude for short deviations of the amplitude when touching the sensor surface.
  • a slow Filtering can also be detected and adapted to slow changes in environmental conditions, such as changes in humidity.
  • the values determined over the 40 millisecond period are compared with a preset threshold value, a control signal being sent to the drive 7 when the threshold value is exceeded.
  • control signal is initially guided via a power stage 21 in order to output variable control signals to the drive 7 as a function of the preliminary conditions and the duration of the contact of the sensor surface.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

The roller cabinet (1) comprises a furniture structure with two guide rails (6), where a roller mat (3) proceeds into the guide rails. An electric drive stands in operative connection with the roller mat. A control circuit is provided, which is controller by an electric drive. A section of the roller mat or the guide rails is designed as a capacitive sensor surface, which is coupled to the control circuit.

Description

Die vorliegende Erfindung betrifft einen Rollladenschrank gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a roller shutter cabinet according to the preamble of claim 1.

Bei Rollladenschränken der gattungsgemäßen Art wird eine Rollladenmatte von einem elektrischen Antrieb angetrieben, der über eine Steuerschaltung gesteuert wird. Zum Öffnen oder Schließen des Rollladenschrankes betätigt ein Benutzer einen außen an dem Möbelkorpus platzierten Schalter. Je nach Ausführung der Steuerschaltung und des Betätigungsschalters, beispielsweise in Gestalt eines Kippschalters, wird der Antrieb so angesteuert, dass die Rollladenmatte 3 in eine Öffnungsposition des Rollladenschrankes oder in eine Schließposition des Rollladenschrankes bewegt wird. Führungsschienen und ggf. auch die Rolllademnatte sind zur Erhöhung der Verschleißfestigkeit oder aus Stabilitätsgründen aus Metall gefertigt.In roller shutter cabinets of the generic type, a roller shutter mat is driven by an electric drive, which is controlled by a control circuit. To open or close the shutter cabinet, a user actuates a switch placed on the outside of the furniture body. Depending on the design of the control circuit and the operating switch, for example in the form of a toggle switch, the drive is controlled so that the roller shutter mat 3 is moved to an open position of the roller shutter cabinet or in a closed position of the roller shutter cabinet. Guide rails and possibly also the Rolllademnatte are made to increase the wear resistance or stability reasons of metal.

Nachteilig bei einem solchen Rollladenschrank ist, dass je nach Positionierung des Schalters zur Betätigung des Antriebs der Rollladenschrank so positioniert sein muss, dass ein Benutzer den Schalter erreichen kann.A disadvantage of such a roller shutter cabinet is that, depending on the positioning of the switch for actuating the drive, the roller shutter cabinet must be positioned so that a user can reach the switch.

Aufgabe der vorliegenden Erfindung ist es, einen Rollladenschrank bereit zu stellen, bei dem eine Betätigung des Antriebs erleichtert ist.Object of the present invention is to provide a roller shutter cabinet, in which an actuation of the drive is facilitated.

Diese Aufgabe wird durch einen Rollladenschrank mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a roller shutter cabinet with the features of claim 1.

Erfindungsgemäß ist der aus einem elektrisch leitenden Material bestehende Teil der Rollladenmatte und / oder der Führungsschienen als kapazitive Sensorfläche ausgebildet, die mit der Steuerschaltung zur Steuerung des elektrischen Antriebs gekoppelt ist.According to the invention, the part of the roller shutter mat and of the guide rails consisting of an electrically conductive material is designed as a capacitive sensor surface which is coupled to the control circuit for controlling the electric drive.

Dadurch ist für einen Benutzer ein großflächiger "Schalter" an der Vorderseite des Rollladenschranks bereit gestellt, der ein einfaches Bedienen des Antriebs ermöglicht.As a result, a large-area "switch" on the front of the roller shutter cabinet is provided for a user, which allows easy operation of the drive.

Bevorzugte Ausführungsvarianten sind Gegenstand der Unteransprüche.Preferred embodiments are subject of the dependent claims.

Gemäße einer bevorzugten Ausführungsvariante weist die Steuerschaltung einen Halbleiterschalter auf. Solche Halbleiterschalter, beispielsweise in Gestalt eines Mikrocontrollers, sind preiswerte elektronische Bauteile, mit denen eine digitale Auswertung der Sensorsignale ermöglicht ist und die eine weitestgehende Anpassung an verschiedene Umgebungsbedingungen realisierbar sind.According to a preferred embodiment, the control circuit has a semiconductor switch. Such semiconductor switches, for example in the form of a microcontroller, are inexpensive electronic components with which a digital evaluation of the sensor signals is made possible and which can be realized as far as possible adaptation to different environmental conditions.

Gemäß einer bevorzugten Ausführungsvariante weist der Halbleiterschalter ein Referenzsignalgeber, insbesondere zur Erzeugung eines pulsweitenmodulierten (PWM) Sinussignals, einen Steuereingang, einen Signalausgang und eine Auswerteeinheit auf. Die Auswerteeinheit weist dabei insbesondere einen digitalen Lock-In-Verstärker auf, mit dem Störsignale wirksam unterdrückbar sind.According to a preferred embodiment variant, the semiconductor switch has a reference signal generator, in particular for generating a pulse-width-modulated (PWM) sine signal, a control input, a signal output and an evaluation unit. The evaluation unit has in particular a digital lock-in amplifier, with the interference signals can be effectively suppressed.

Die Sensorfläche ist gemäß einer bevorzugten Ausführungsvariante über einen analogen Bandpassfilter mit dem Steuereingang des Halbleiterschalters gekoppelt und der Referenzsignalgeber ist über einen analogen Tiefpass mit der Sensorfläche und dem Bandpassfilter gekoppelt. Bevorzugt ist hinter dem Steuereingang, betrachtet in Signallaufrichtung, ein Analog-/Digitalwandler vorgesehen. Dadurch kann ein analoges vorgefiltertes und in der Amplitude angepasstes Signal über den im Halbleiterschalter integrierten Analog-/Digitalwandler in ein digitales Signal umgewandelt und anschließend nach Prinzipien der digitalen Signalverarbeitung ausgewertet werden.The sensor surface is coupled according to a preferred embodiment via an analog bandpass filter with the control input of the semiconductor switch and the reference signal generator is coupled via an analog low-pass filter with the sensor surface and the bandpass filter. Preferably, an analog / digital converter is provided behind the control input, viewed in the signal travel direction. As a result, an analog prefiltered and amplitude-adapted signal can be converted into a digital signal via the analog / digital converter integrated in the semiconductor switch and then evaluated according to principles of digital signal processing.

Zur Anpassung an verschiedene Sensorflächen und andere räumliche Gegebenheiten, die die Grundkapazität der Sensorfläche und damit die Grundamplitude verändern, ist in Signallaufrichtung vor dem Steuereingang ein Nachverstärker vorgesehen. Dieser ist besonders bevorzugt von dem Halbleiterschalter steuerbar.To adapt to different sensor surfaces and other spatial conditions that change the basic capacity of the sensor surface and thus the basic amplitude, a post-amplifier is provided in the signal direction before the control input. This is particularly preferably controlled by the semiconductor switch.

Nachfolgend werden bevorzugte Ausführungsvarianten der Erfindung anhand der beiliegenden Zeichnungen noch näher erläutert. Es zeigen:

Figur 1
eine schematisch dargestellte Perspektivdarstellung eines Rollla- denschranks mit einer durch eine Rollladenmatte verschließbaren Vorderseite,
Figur 2
eine schematische Darstellung einer Ausführungsvariante der Steuerschaltung.
Hereinafter, preferred embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Show it:
FIG. 1
a schematically illustrated perspective view of a roller shutter cabinet with a closable by a roller shutter mat front,
FIG. 2
a schematic representation of an embodiment of the control circuit.

Figur 1 zeigt einen Rollladenschrank, dessen offene Vorderseite 2 in an sich bekannter Weise durch eine Rollladenmatte 3 verschließbar ist. Die Rolllademnatte 3 besteht aus einer Vielzahl von parallel zueinander verlaufenden Lamellen 4, die Rollladenmatte 3 ist in seitlichen Führungsschienen 6 des Möbelkorpus des Rollladenschranks 1 geführt. FIG. 1 shows a roller shutter cabinet, the open front 2 is closed in a conventional manner by a roller shutter mat 3. The Rolllademnatte 3 consists of a plurality of mutually parallel slats 4, the roller shutter mat 3 is guided in lateral guide rails 6 of the furniture body of the roller shutter cabinet 1.

Die Führungsschienen 6, insbesondere zumindest ein Teil der zur Vorderseite 2 des Rollladenschranks 1 zeigenden Frontfläche 5 der Führungsschienen 6 und/oder mindestens ein Teil der Rollladenmatte 3 bestehen aus einem elektrisch leitenden Material, beispielsweise einem Metallblech.The guide rails 6, in particular at least part of the front face 2 of the roller shutter cabinet 1 facing front surface 5 of the guide rails 6 and / or at least a portion of the roller shutter mat 3 are made of an electrically conductive material, such as a metal sheet.

Die Bewegung der Rollladenmatte in den Führungsschienen 6 erfolgt durch einen elektrischen Antrieb 7 (hier nicht gezeigt), der vorzugsweise im Inneren des Rollladenschranks 1 oder an einer Rückseite des Rollladenschranks 1 angeordnet ist und über einen Netzanschluss oder Akkumulatoren betreibbar ist.The movement of the roller shutter mat in the guide rails 6 is effected by an electric drive 7 (not shown here), which is preferably arranged in the interior of the roller shutter cabinet 1 or on a rear side of the roller shutter cabinet 1 and can be operated via a mains connection or accumulators.

Zur Betätigung des Antriebs 7 ist der elektrische Antrieb 7 mit einer den Antrieb 7 steuernden Steuerschaltung 8 verbunden.For actuating the drive 7, the electric drive 7 is connected to a control circuit 8 controlling the drive 7.

Zur Betätigung des Antriebs durch einen Benutzer ist der aus dem elektrisch leitenden Material bestehende Teil der Rollladenmatte 3 und /oder der Führungsschienen 6 als kapazitive Sensorfläche 22 ausgebildet, die mit der Steuerschaltung 8 gekoppelt ist. Durch die Ausbildung einer solchen kapazitiven Sensorfläche kann ein Benutzer durch bloße Berührung der Sensorfläche eine Bewegung der Rollladenmatte 3 herbeiführen. Bei besonders empfindlich eingestellter Steuerschaltung 8 reicht auch eine bloße Annäherung eines elektrisch leitfähigen Körpers oder die Annäherung eines Körpers mit hoher Dielektrizitätszahl an die Sensorfläche aus. Die Berührung bzw. Annäherung eines solchen Körpers vergrößert die Kapazität der Sensorfläche, deren Änderungen ausgewertet werden kann und in ein Befehlssignal für den elektrischen Antrieb umwandelbar ist.For actuating the drive by a user, the part of the roller shutter mat 3 and / or of the guide rails 6 consisting of the electrically conductive material is designed as a capacitive sensor surface 22, which is coupled to the control circuit 8. By forming such a capacitive sensor surface, a user can bring about a movement of the roller shutter mat 3 simply by touching the sensor surface. In the case of a particularly sensitive control circuit 8, a mere approximation of an electrically conductive body or the approach of a body with a high dielectric constant to the sensor surface also suffice. The contact or approach of such a body increases the capacitance of the sensor surface, the changes of which can be evaluated and converted into a command signal for the electric drive.

In Figur 2 ist eine Ausführungsvariante einer Steuerschaltung 8 gezeigt, mit der eine solche Signalerfassung und -auswertung vorgenommen werden kann.In FIG. 2 an embodiment of a control circuit 8 is shown with which such a signal detection and evaluation can be made.

Zentrales Bauelement der Steuerschaltung 8 ist ein Halbleiterschalter 12, der bevorzugt als Mikrocontroller mit einer Auswertesoftware ausgebildet ist. Dieser Mikrocontroller weist einen Referenzsignalgeber 13 auf, der bevorzugt ein pulsweitenmoduliertes Sinussignal erzeugt, das aus einem Signalausgang 15 aus dem Halbleiterschalter 12 austritt und über einen analogen Tiefpassfilter 17 frequenz- und pegelstabil als analoges Ausgangssignal mit hoher spektraler Reinheit, das heißt mit geringem Oberwellenanteil, zurück gewonnen wird. Für die später folgende digitale Auswertung des digitalen Sensorsignales ist es dabei vorteilhaft und notwendig, dass die Frequenz des Ausgangssignals absolut konstant zu einer Abtastrate erzeugt wird. Zur Einstellung eines geeigneten elektrischen Stroms bei einer gegebenen elektrischen Spannung ist hinter dem Tiefpass ein Vorwiderstand 18 vorgesehen. Hinter diesem Vorwiderstand ist das von der Sensorfläche 22 ausgehende Signal in die Schaltung eingekoppelt.The central component of the control circuit 8 is a semiconductor switch 12, which is preferably designed as a microcontroller with an evaluation software. This microcontroller has a reference signal generator 13, which preferably generates a pulse-width-modulated sinusoidal signal, which emerges from a signal output 15 from the semiconductor switch 12 and an analog low-pass filter 17 frequency and level stable as an analog output signal with high spectral purity, ie with low harmonic content back is won. For the later following digital evaluation of the digital sensor signal, it is advantageous and necessary that the frequency of the output signal is generated absolutely constant to a sampling rate. To set a suitable electrical current at a given electrical voltage, a series resistor 18 is provided behind the low-pass filter. Behind this series resistor, the outgoing signal from the sensor surface 22 is coupled into the circuit.

Wie in Figur 2 schematisch dargestellt, ändert sich die Kapazität der Sensorfläche 22 von einer Grundkapazität 11 zu einer Berührungskapazität 10, die durch Berühren oder Annähern beispielsweise eines Fingers eines Benutzers 9 hervorgerufen wird.As in FIG. 2 shown schematically, the capacitance of the sensor surface 22 changes from a basic capacity 11 to a contact capacitance 10 by touching or approaching, for example, a finger of a user 9.

Das mit dem Sensorsignal überlagerte Ausgangssignal wird anschließend über einen Bandpassfilter 19 gerührt. Dieser Bandpassfilter 19 lässt im Wesentlichen nur das gewünschte Sensorsignal durch und unterdrückt sowohl die tiefere als auch höhere Störfrequenzen. Tiefere Störfrequenzen entstehen beispielsweise durch einen technischen Wechselstrom (sog. Netzbrummen), welche in die Sensorfläche 22 einkoppel kann. Höhere Störfrequenzen sind beispielsweise Hochfrequenzsignale, die ebenfalls in die Sensorfläche 22 einkoppeln können. Zur Anpassung an verschieden bemessene Sensorflächen 22 und andere räumliche Gegebenheiten, die die Kapazität der Sensorfläche 22 gegen Erde und damit die Grundamplitude verändern, ist hinter dem Bandpassfilter 19 bevorzugt eine variable Nachverstärkung 20 vorgesehen, die bevorzugt von dem Mikrocontroller 12 gesteuert wird.The output signal superposed with the sensor signal is subsequently stirred via a bandpass filter 19. This bandpass filter 19 essentially passes only the desired sensor signal and suppresses both the lower and higher noise frequencies. Deeper interference frequencies arise, for example, due to a technical alternating current (so-called mains humming), which can couple into the sensor surface 22. Higher interference frequencies are, for example, high-frequency signals, which can also couple into the sensor surface 22. To adapt to differently dimensioned sensor surfaces 22 and other spatial conditions that change the capacitance of the sensor surface 22 to ground and thus the fundamental amplitude, a variable post-amplification 20 is preferably provided behind the band-pass filter 19, which is preferably controlled by the microcontroller 12.

Das analoge vorgefilterte und in der Amplitude angepasste Signal wird anschließend über einen in dem Halbleiterschalter 12 integrierten Analog- /Digitalwandler 24 in ein digitales Signal umgewandelt. Dieser Analog-/Digitalwandler 24 ist dabei in Signallaufrichtung hinter dem Steuereingang 16 des Halbleiterschalters 12 vorgesehen.The analog prefiltered and amplitude adjusted signal is then converted into a digital signal via an analog / digital converter 24 integrated in the semiconductor switch 12. This analog / digital converter 24 is provided in the signal travel direction behind the control input 16 of the semiconductor switch 12.

Das digitale Signal wird anschließend mit Hilfe der Software und eines digitalen Lock-In-Verstärkers 14 ausgewertet. Dabei wird zunächst mit Hilfe des Lock-In-Verstärkers 14 die Amplitude des Signals durch phasenunabhängige Synchrongleichrichtung bestimmt, wodurch weitere Anteile von Störsignalen unterdrückt werden. Die dabei erforderliche Mittelwertbildung wird bevorzugt über die doppelte Netzfrequenzperiodendauer vorgenommen, was bei einer Netzfrequenz von 50Hz einer Periodendauer von 40 Millisekunden, d.h. zwei ganzen Perioden der Netzfrequenz von 20 Millisekunden entspricht. Dadurch können zusätzlich über den Kammfiltereffekt Restanteile der 50Hz-Netzfrequenz unterdrückt werden. Aus der in dieser Weise gewonnenen Amplitudeninfonnation wird über einen sehr langsaln arbeitenden Filter mit einer Zeitkonstante von einige Sekunden ein sog. Hintergrund ennittelt, welcher als Referenzamplitude für kurze Abweichungen der Amplitude bei Berührung der Sensorfläche dient. Mit einer derartigen langsamen Filterung können auch langsam ablaufende Änderungen in den Umgebungsbedingungen, wie beispielsweise Änderungen der Luftfeuchtigkeit, erfasst und angepasst werden.The digital signal is then evaluated using the software and a digital lock-in amplifier 14. In this case, the amplitude of the signal is initially determined with the aid of the lock-in amplifier 14 by phase-independent synchronous rectification, whereby further portions of interference signals are suppressed. The required averaging is preferably made over twice the mains frequency period, which corresponds to a mains frequency of 50 Hz a period of 40 milliseconds, ie two whole periods of the mains frequency of 20 milliseconds. As a result, residual components of the 50 Hz mains frequency can also be suppressed via the comb filter effect. From the obtained amplitude information in this manner nation n operating filter with a time constant of some seconds a so-called. Ennittelt background is a very dying slowly l, which serves as a reference amplitude for short deviations of the amplitude when touching the sensor surface. With such a slow Filtering can also be detected and adapted to slow changes in environmental conditions, such as changes in humidity.

Zur Erzeugung eines den Signalausgang 23 des Halbleiterschalters 12 verlassenden Steuersignals für den elektrischen Antrieb 7 werden die über die 40 Millisekunden-Periode ermittelten Werte mit einem voreingestellten Schwellwert verglichen, wobei bei Überschreiten des Schwellwertes ein Steuersignal an den Antrieb 7 gesendet wird.In order to generate a control signal for the electric drive 7 leaving the signal output 23 of the semiconductor switch 12, the values determined over the 40 millisecond period are compared with a preset threshold value, a control signal being sent to the drive 7 when the threshold value is exceeded.

Gemäß einer bevorzugten Ausführungsvariante wird das Steuersignal zunächst noch über eine Leistungsstufe 21 geführt, um abhängig von den Vorzuständen und der Dauer der Berührung der Sensorfläche variable Steuersignale an den Antrieb 7 auszugeben.According to a preferred embodiment variant, the control signal is initially guided via a power stage 21 in order to output variable control signals to the drive 7 as a function of the preliminary conditions and the duration of the contact of the sensor surface.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

RollladenschrankRoller shutter cupboard
11
Vorderseitefront
22
RollladenmatteBlinds mat
33
Lamellenslats
44
Frontflächefront surface
55
Führungsschienenguide rails
66
Antriebdrive
77
Steuerschaltungcontrol circuit
88th
Benutzeruser
99
Berührungskapazitättouch capacitance
1010
Grundkapazitätbasic capacity
1111
HalbleiterschalterSemiconductor switches
1212
ReferenzsignalgeberReference signal generator
1313
Lock-In-VerstärkerLock-in amplifier
1414
Signalausgangsignal output
1515
Steuereingangcontrol input
1616
Analoger TiefpassAnalog low pass
1717
Vorwiderstanddropping resistor
1818
BandpassfilterBandpass filter
1919
Nachverstärkungamplification
2020
Leistungsstufepower stage
2121
Sensorflächesensor surface
2222
Signalausgangsignal output
2323
Analog- /DigitalwandlerAnalog / digital converter
2424

Claims (9)

Rollladenschrank (1), aufweisend - einen Möbelkorpus mit zwei Führungsschienen (6), - eine in den Führungsschienen (6) führbare Rollladenmatte (3), - einen mit der Rollladenmatte (3) in Wirkverbindung stehenden elektrischen Antrieb (7), - eine den elektrischen Antrieb (7) steuernde Steuerschaltung (8), - wobei mindestens ein Teil der Rollladenmatte (3) und/oder mindestens ein Teil mindestens einer der Führungsschienen (6) aus einem elektrisch leitenden Material bestehen,
dadurch gekennzeichnet, dass - der aus dem elektrisch leitenden Material bestehende Teil der Rollladenmatte (3) und/oder der Führungsschienen (6) als kapazitive Sensorfläche (22) ausgebildet ist, die mit der Steuerschaltung (8) gekoppelt ist. Roller shutter cabinet (1), comprising a furniture body with two guide rails (6), a roller shutter mat (3) which can be guided in the guide rails (6), - an electric drive (7) operatively connected to the roller shutter mat (3), a control circuit (8) controlling the electric drive (7), - wherein at least part of the roller shutter mat (3) and / or at least a part of at least one of the guide rails (6) consist of an electrically conductive material,
characterized in that - The consisting of the electrically conductive material part of the roller shutter mat (3) and / or the guide rails (6) as a capacitive sensor surface (22) is formed, which is coupled to the control circuit (8). Rollladenschrank (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Steuerschaltung (8) einen Halbleiterschalter (12) aufweist.Roller shutter cabinet (1) according to claim 1, characterized in that the control circuit (8) comprises a semiconductor switch (12). Rollladenschrank (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Halbleiterschalter (12) einen Referenzsignalgeber (13), einen Steuereingang (16) und einen Signalausgang (23) und eine Auswerteeinheit (25) aufweist.Roller shutter cabinet (1) according to claim 1 or 2, characterized in that the semiconductor switch (12) has a reference signal generator (13), a control input (16) and a signal output (23) and an evaluation unit (25). Rollladenschrank (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Sensorfläche (22) über einen analogen Bandpassfilter (19) mit dem Steuereingang (16) des Halbleiterschalters (12) gekoppelt ist und der Referenzsignalgeber (13) über einen analogen Tiefpass (17) mit der Sensorfläche (22) und dem Bandpassfilter (19) gekoppelt ist.Roller shutter cabinet (1) according to claim 3, characterized in that the sensor surface (22) via an analog bandpass filter (19) to the control input (16) of the semiconductor switch (12) is coupled and the reference signal generator (13) via an analog low-pass filter (17) is coupled to the sensor surface (22) and the bandpass filter (19). Rollladenschrank (1) nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass in einer Signallaufrichtung hinter dem Steuereingang (16) ein Analog-DigitalWandler (24) vorgesehen ist.Roller shutter cabinet (1) according to claim 3 or 4, characterized in that in a signal traveling direction behind the control input (16), an analog-digital converter (24) is provided. Rollladenschrank (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Auswerteeinheit (25) einem digitalen Lock-In-Verstärker (14) aufweist.Roller shutter cabinet (1) according to claim 3, characterized in that the evaluation unit (25) has a digital lock-in amplifier (14). Rollladenschrank (1) nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass der Referenzsignalgeber (11) zur Erzeugung eines pulsweitenmodulierten Sinussignals ausgebildet ist.Roller shutter cabinet (1) according to one of claims 3 to 6, characterized in that the reference signal generator (11) is designed to generate a pulse width modulated sine signal. Rollladenschrank (1) nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass in der Signallaufrichtung vor dem Steuereingang (4) ein Nachverstärker (9) vorgesehen ist.Roller shutter cabinet (1) according to one of claims 3 to 7, characterized in that in the signal direction in front of the control input (4) a post-amplifier (9) is provided. Rollladenschrank (1) nach Anspruch 8, dadurch gekennzeichnet, dass der Nachverstärker (9) von dem Halbleiterschalter (3) steuerbar ist.Roller shutter cabinet (1) according to claim 8, characterized in that the post-amplifier (9) of the semiconductor switch (3) is controllable.
EP10160878A 2009-05-04 2010-04-23 Roller blind cabinet Not-in-force EP2250945B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202009004776U DE202009004776U1 (en) 2009-05-04 2009-05-04 Roller shutter cupboard

Publications (2)

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EP2250945A1 true EP2250945A1 (en) 2010-11-17
EP2250945B1 EP2250945B1 (en) 2011-12-07

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ID=42542875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10160878A Not-in-force EP2250945B1 (en) 2009-05-04 2010-04-23 Roller blind cabinet

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EP (1) EP2250945B1 (en)
AT (1) ATE536121T1 (en)
DE (1) DE202009004776U1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8808914U1 (en) * 1988-07-12 1988-08-25 Bauer-Organisation Kg Stahlmoebelfabrik, 7441 Unterensingen, De
DE19602180A1 (en) * 1996-01-23 1997-07-24 Ehage Sonnenschutz Gmbh Flat window shade or shutter with sensing element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8808914U1 (en) * 1988-07-12 1988-08-25 Bauer-Organisation Kg Stahlmoebelfabrik, 7441 Unterensingen, De
DE19602180A1 (en) * 1996-01-23 1997-07-24 Ehage Sonnenschutz Gmbh Flat window shade or shutter with sensing element

Also Published As

Publication number Publication date
DE202009004776U1 (en) 2010-09-23
EP2250945B1 (en) 2011-12-07
ATE536121T1 (en) 2011-12-15

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