EP0745962B1 - Switching device for automatically controlling a lighting switch - Google Patents

Switching device for automatically controlling a lighting switch Download PDF

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Publication number
EP0745962B1
EP0745962B1 EP96108423A EP96108423A EP0745962B1 EP 0745962 B1 EP0745962 B1 EP 0745962B1 EP 96108423 A EP96108423 A EP 96108423A EP 96108423 A EP96108423 A EP 96108423A EP 0745962 B1 EP0745962 B1 EP 0745962B1
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EP
European Patent Office
Prior art keywords
switching device
room
motion detector
radiation
room lighting
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EP96108423A
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German (de)
French (fr)
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EP0745962A1 (en
Inventor
Rainer Dr. Rosch
Günter Prof. Dr. Hofmann
Volkmar Dr. Norkus
Jens-Olaf Lang
Manfred Dr. Zimmerhackl
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ABB Patent GmbH
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ABB Patent GmbH
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00Burglar, theft or intruder alarms
    • G08B13/18Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/187Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interference of a radiation field

Definitions

  • the invention relates to a switching device according to the preamble of claim 1.
  • an infrared motion detector is used both for switching room lighting on and off.
  • Such a solution is known for example from US-A-4 433 328.
  • the object of the invention is a switching device according to the Preamble of claim 1 to improve in that without elaborate additional devices even slight movements in Space remaining people are detectable.
  • Switching device can be expanded arbitrarily, with it in mind the task is advantageous, at least two first motion detectors to be arranged so that they separate, if necessary Capture overlapping areas. Switching off the In this case, room lighting only occurs if all motion detectors no longer register movement. This makes it possible certain areas of a room, e.g. B. a desk area, monitoring that is particularly sensitive to undergo. As a rule, one will not rely on one want to limit the automatic switch-off of the room lighting, so that you can install at least a second motion detector which is then set up as a passive infrared motion detector can be, and the room lighting during movements detected by him switches on. It is also possible to use the first Motion detector with the second motion detector in one device summarize, which then fulfills both functions, i.e. the Room lighting can switch on and off.
  • the automatically acting switching device can you also combine a manually operated switch so that switching the room lighting on and / or off is optional can also be done by hand. It is useful here with a appropriate programming that allows to work with help automatic switch off of the manually operated switch room lighting by a certain type of switch actuation, e.g. B. by double-pressing to block.
  • a significant increase in the sensitivity of the first motion detector can be achieved in that this optical means has at least within the area to be monitored form two beams, according to shape and size are about the same.
  • the optoelectric Sensor with the help of two equipolar ones in series Build light-sensitive units, their center tap then to be connected to an amplifier so that a difference signal arises from both parts of the series connection.
  • the Photosensitive units can also be connected in parallel several individual elements of the same number exist.
  • the usual method is used to form the radiation lobes optical devices with the help of lenses and / or mirrors and / or panels. Then depends on their dimensioning Shape and size of the radiation lobes.
  • For the differentiated Monitoring of a larger area of the room can be done to counter phase Radiation reception suitable light-sensitive units multiple times within the first motion detector, e.g. B. arrange in the form of a row or matrix.
  • the variant of a sensor S shown in FIG. 1 shows one Series connection of single-pole light sensitive one behind the other Modules LE1, LE2.
  • the series connection is about supplied with a supply voltage and has a center tap M connected to a current-voltage converter V. is. This keeps the working point of the photosensitive Units stable and only amplifies the current difference from both.
  • the basic signal levels generated by background reflection are largely compensated for, so that only through Movement-induced alternating signals the evaluation electronics E of a receiver EM.
  • a particularly good suppression of the background radiation is achieved through the formation of radiation lobes.
  • FIG. 2 Here are from a transmitter SE, which in this case also serves as room lighting serves to emit light beams LS, which is a transmitter side Generate radiation beam KS.
  • LS which is a transmitter side Generate radiation beam KS.
  • This encloses at least two adjacent radiation lobes K1, K2 on the receiver side with the help of suitable optical means OM from a receiver EM be generated. These are precisely defined areas from which reflected light radiation LS to the receiver EM.
  • Fig. 3 an arrangement is shown schematically, which allows automatically switch room lighting 5 on and off.
  • room lighting that emits light rays 6 5 connected to a lighting switch 4, which via a Evaluation electronics 3 can be activated.
  • the latter receives her Input signals from a first motion detector 1 and one second motion detector 2.
  • the second motion detector can be a usual passive infrared motion detector that detects the movements a moving object 7 registered and the evaluation electronics 3 possibly causes the lighting switch 4 to be switched on.
  • the first motion detector 1 is designed that it works in the frequency range of visible light and responsive to reflected light rays 8, which with the help of emitted light beams 6 on a reflective body 7 be generated.
  • This reflecting body 7 moves forward an essentially homogeneous background, so with the already measures described the sensitivity of the first motion detector 1, the second anyway due to its design Motion detector 2 is superior to be further increased. This is thus even the smallest by the moving body 7 caused radiation changes react. In the absence of the The first motion detector 1 can thus detect changes in radiation an appropriate delay time the evaluation electronics 3 cause the lighting switch 4 to turn off. Sometimes however, one will be interested in the automatic to be replaced by a manual control and rather one for this Operate the provided hand switch 10.
  • This hand switch 10 is integrated in the lighting switch in the present case and coded in such a way that when the button is pressed twice briefly, the Automatic shutdown overrides.

Abstract

The switching device has at least one optoelectronic movement detector (1,2) for automatic operation of a room lighting switch (4) in dependence on the room occupation, indicated by the detected variations in the light radiation. The room lighting (5) acts as the source for the light radiation detected by a movement detector operating in the visible light spectrum range, with the room lighting switched off when no perceptible variation in the reflected light radiation (8) is detected within a given time frame.

Description

Die Erfindung betrifft eine Schaltvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a switching device according to the preamble of claim 1.

Automatisch wirkende Schaltvorrichtungen, z. B. zur Bedienung einer Raumbeleuchtung, werden immer beliebter, da sie einerseits einen gewissen Bequemlichkeitskomfort bieten, andererseits aber auch zu einer beträchtlichen Stromeinsparung beitragen können. Es sind viele Lösungen bekannt, die das automatische Einschalten einer Beleuchtung gestatten, z. B., wenn eine Person einen bestimmten Bereich betritt. Nur wenige Lösungsvorschläge existieren jedoch, um die Beleuchtung auch wieder automatisch auszuschalten, wenn die letzte Person den bestimmten Bereich oder Raum verlassen hat. Gerade dies ist aber im Hinblick auf die erwähnte Stromersparnis von besonderer Bedeutung.Automatically acting switching devices, e.g. B. for operation room lighting, are becoming more popular because they are one hand offer a certain comfort, but on the other hand can also contribute to considerable electricity savings. There are many known solutions that switch on automatically allow lighting, e.g. B. when a person a certain Area. There are only a few solutions however, to automatically switch off the lighting again, if the last person the particular area or Has left the room. But this is precisely what is mentioned with regard to the Electricity savings of particular importance.

Bei einer bekannten Lösung dient ein Infrarotbewegungsmelder sowohl zum Ein- wie auch zum Abschalten einer Raumbeleuchtung. Eine derartige lösung ist beispielsweise aus der US-A-4 433 328 bekannt. Werden innerhalb einer am Bewegungsmelder einstellbaren Verzögerungszeit keine Bewegungen mehr registriert, wird angenommen, daß alle Personen den Raum verlassen haben und damit die Beleuchtung ausgeschaltet werden kann. Da man aber mit passiven Infrarotbewegungsmeldern nicht alle kleinen Bewegungen, wie sie z. B. bei Schreibtischarbeiten entstehen, erfassen kann, ist man genötigt, die Verzögerungszeit für das Ausschalten relativ groß zu wählen, damit eventuell im Raum verbliebene Personen nicht im Dunklen sitzen müssen. In a known solution, an infrared motion detector is used both for switching room lighting on and off. Such a solution is known for example from US-A-4 433 328. Are within a delay time that can be set on the motion detector no more movements registered, it is assumed that all people have left the room and thus the Lighting can be switched off. Since you are using passive Infrared motion detectors don't do all the small movements like they do e.g. B. can arise in desk work, is one required, the delay time for switching off is relatively large to be selected so that people who may remain in the room are not in the Must sit dark.

Aufgabe der Erfindung ist es, eine Schaltvorrichtung nach dem Oberbegriff des Anspruchs 1 dahingehend zu verbessern, daß ohne aufwendige Zusatzeinrichtungen auch geringfügige Bewegungen im Raum verbliebener Personen erfaßbar sind.The object of the invention is a switching device according to the Preamble of claim 1 to improve in that without elaborate additional devices even slight movements in Space remaining people are detectable.

Diese Aufgabe wird durch die im Anspruch 1 gekennzeichneten Merkmale gelöst. Zweckmäßige Ausgestaltungen und Weiterbildungen des Erfindungsgegenstandes sind in den Unteransprüchen genannt.This object is characterized by those in claim 1 Features resolved. Appropriate refinements and training of the subject matter of the invention are mentioned in the subclaims.

Ein entscheidender Vorteil der erfindungsgemäßen Lösung besteht darin, daß zum Abschalten der Raumbeleuchtung nicht mit einem Passiv-Infrarot-Bewegungsmelder gearbeitet wird, sondern hierzu ein Bewegungsmelder dient, der primär im Bereich sichtbaren Lichtes arbeitet. Ein solcher Bewegungsmelder kann mit einer hohen Empfindlichkeit ausgestattet werden und es ist möglich, ihn sehr exakt auf einen bestimmten Überwachungsbereich auszurichten. Dennoch bedarf- es hierzu erfindungsgemäß keines Senders, da dessen Funktion von der Raumbeleuchtung übernommen wird. Da der Sensor nicht auf von Personen emittierte Wärmestrahlung, sondern nur auf reflektiertes Licht im sichtbaren Bereich anspricht, kann er nicht durch störende Wärmequellen irritiert werden.There is a decisive advantage of the solution according to the invention in that not to switch off the room lighting with a Passive infrared motion detector is used, but for this a motion detector is used that is primarily visible in the area Light works. Such a motion detector can with a high Sensitivity and it is possible for him to be aligned very precisely to a certain surveillance area. Nevertheless, according to the invention, no transmitter is required because whose function is taken over by the room lighting. Since the Sensor not on heat radiation emitted by people, but only responds to reflected light in the visible range, it cannot be irritated by annoying heat sources.

In einer Weiterbildung des Erfindungsgegenstandes kann die Schaltvorrichtung beliebig ausgebaut werden, wobei es im Sinn der Aufgabenstellung vorteilhaft ist, mindestens zwei erste Bewegungsmelder so anzuordnen, daß sie getrennte, sich gegebenenfalls überschneidende Raumbereiche erfassen. Ein Ausschalten der Raumbeleuchtung erfolgt in diesem Fall nur, wenn alle Bewegungsmelder keine Bewegung mehr registrieren. Hierdurch ist es möglich, bestimmte Bereiche eines Raumes, z. B. einen Schreibtischbereich, einer besonders empfindlich reagierenden Überwachung zu unterziehen. In der Regel wird man sich nicht auf ein automatisches Abschalten der Raumbeleuchtung beschränken wollen, so daß man mindestens einen zweiten Bewegungsmelder installieren wird, der dann als Passiv-Infrarot-Bewegungsmelder aufgebaut werden kann, und der bei von ihm erfaßten Bewegungen die Raumbeleuchtung einschaltet. Weiterhin ist es möglich, den ersten Bewegungsmelder mit dem zweiten Bewegungsmelder in einem Gerät zusammenzufassen, das dann beide Funktionen erfüllt, also die Raumbeleuchtung ein- und ausschalten kann.In a further development of the subject matter of the invention Switching device can be expanded arbitrarily, with it in mind the task is advantageous, at least two first motion detectors to be arranged so that they separate, if necessary Capture overlapping areas. Switching off the In this case, room lighting only occurs if all motion detectors no longer register movement. This makes it possible certain areas of a room, e.g. B. a desk area, monitoring that is particularly sensitive to undergo. As a rule, one will not rely on one want to limit the automatic switch-off of the room lighting, so that you can install at least a second motion detector which is then set up as a passive infrared motion detector can be, and the room lighting during movements detected by him switches on. It is also possible to use the first Motion detector with the second motion detector in one device summarize, which then fulfills both functions, i.e. the Room lighting can switch on and off.

Mit der insoweit automatisch wirkenden Schaltvorrichtung kann man außerdem einen manuell bedienbaren Schalter so vereinigen, daß das Aus- und/oder Einschalten der Raumbeleuchtung wahlweise auch von Hand erfolgen kann. Zweckmäßig ist es hierbei mit einer geeigneten Programmierung zu arbeiten, die es erlaubt, mit Hilfe des manuell bedienbaren Schalters das automatische Ausschalten der Raumbeleuchtung durch eine bestimmte Art der Schalterbetätigung, z. B. durch einen doppelten Tastendruck, zu blockieren.With the automatically acting switching device can you also combine a manually operated switch so that switching the room lighting on and / or off is optional can also be done by hand. It is useful here with a appropriate programming that allows to work with help automatic switch off of the manually operated switch room lighting by a certain type of switch actuation, e.g. B. by double-pressing to block.

Eine deutliche Steigerung der Empfindlichkeit des ersten Bewegungsmelders ist dadurch erreichbar, daß dieser optische Mittel besitzt, die innerhalb des zu überwachenden Raumbereiches mindestens zwei Strahlungkeulen bilden, die nach Form und Größe etwa gleich sind. Sorgt man dafür, daß die Strahlungskeulen innerhalb eines optoelektrischen Sensors gegenphasige Signale erzeugen, so werden die durch Hintergrundreflexion erzeugten Signalgrundpegel weitgehend kompensiert und primär die durch Bewegungen ausgelösten Wechselsignale ausgewertet.A significant increase in the sensitivity of the first motion detector can be achieved in that this optical means has at least within the area to be monitored form two beams, according to shape and size are about the same. Make sure that the radiation lobes inside generate signals in phase opposition from an optoelectric sensor, so are the background signal levels generated by background reflection largely compensated and primarily by movements triggered alternating signals evaluated.

Zur Kompensation der Signalgrundpegel kann man den optoelektrischen Sensor mit Hilfe von zwei gleichpoligen in Reihe liegenden lichtempfindlichen Baueinheiten aufbauen, deren Mittelabgriff dann mit einem Verstärker so zu verbinden ist, daß ein Differenzsignal aus beiden Teilen der Reihenschaltung entsteht. Die lichtempfindlichen Baueinheiten können auch aus einer Parallelschaltung mehrerer Einzelelemente gleicher Anzahl bestehen.To compensate for the basic signal level, one can use the optoelectric Sensor with the help of two equipolar ones in series Build light-sensitive units, their center tap then to be connected to an amplifier so that a difference signal arises from both parts of the series connection. The Photosensitive units can also be connected in parallel several individual elements of the same number exist.

Zur Bildung der Strahlungskeulen bedient man sich der üblichen optischen Einrichtungen mit Hilfe von Linsen und/oder Spiegeln und/oder Blenden. Von deren Dimensionierung hängt dann auch die Form und Größe der Strahlungskeulen ab. Zur differenzierten Überwachung eines größeren Raumbereiches kann man die zum gegenphasigen Strahlungsempfang geeigneten lichtempfindlichen Baueinheiten innerhalb des ersten Bewegungsmelders auch mehrfach, z. B. in Form einer Zeile oder Matrix anordnen. The usual method is used to form the radiation lobes optical devices with the help of lenses and / or mirrors and / or panels. Then depends on their dimensioning Shape and size of the radiation lobes. For the differentiated Monitoring of a larger area of the room can be done to counter phase Radiation reception suitable light-sensitive units multiple times within the first motion detector, e.g. B. arrange in the form of a row or matrix.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben. Es zeigen:

Fig. 1
einen Sensor mit gegenphasiger Signalaufnahme,
Fig. 2
eine schematische Darstellung der durch einen Bewegungsmelder erfaßten Strahlungskeulen,
Fig. 3
eine Schaltvorrichtung, die die Raumbeleuchtung als Sender nutzt.
Embodiments of the invention are shown in the drawings and are described in more detail below. Show it:
Fig. 1
a sensor with signal acquisition in phase opposition,
Fig. 2
1 shows a schematic representation of the radiation lobes detected by a motion detector,
Fig. 3
a switching device that uses the room lighting as a transmitter.

Die in Fig. 1 dargestellte Variante eines Sensors S zeigt eine Reihenschaltung gleichpolig hintereinander liegender lichtempfindlicher Baueinheiten LE1, LE2. Die Reihenschaltung wird über eine Versorgungsspannung gespeist und besitzt einen Mittelabgriff M, der an einen Strom-Spannungswandler V angeschlossen ist. Dieser hält den Arbeitspunkt der lichtempfindlichen Baueinheiten stabil und verstärkt nur die Stromdifferenz von beiden. Die durch Hintergrundreflexion erzeugten Signalgrundpegel werden dadurch weitgehend kompensiert, so daß nur die durch Bewegungen hervorgerufenen Wechselsignale die Auswerteelektronik E eines Empfängers EM erreichen.The variant of a sensor S shown in FIG. 1 shows one Series connection of single-pole light sensitive one behind the other Modules LE1, LE2. The series connection is about supplied with a supply voltage and has a center tap M connected to a current-voltage converter V. is. This keeps the working point of the photosensitive Units stable and only amplifies the current difference from both. The basic signal levels generated by background reflection are largely compensated for, so that only through Movement-induced alternating signals the evaluation electronics E of a receiver EM.

Eine besonders gute Unterdrückung der Hintergrundstrahlung wird durch die Ausbildung von Strahlungskeulen erreicht. Eine solche Anordnung ist schematisch in Fig. 2 dargestellt. Hierbei werden von einem Sender SE, der in diesem Fall gleichzeitig als Raumbeleuchtung dient, Lichtstrahlen LS emittiert, die eine senderseitige Strahlungskeule KS erzeugen. Diese umschließt mindestens zwei benachbarte empfängerseitige Strahlungskeulen K1, K2, die mit Hilfe geeigneter optischer Mittel OM von einem Empfänger EM erzeugt werden. Es handelt sich hierbei um genau definierte Bereiche, aus denen reflektierte Lichtstrahlungen LS zum Empfänger EM gelangen. Da die Strahlungskeulen K1, K2 nach Form und Größe weitgehend übereinstimmen, kann man davon ausgehen, daß auch bei einem nicht homogen reflektierenden Hintergrund ein wesentlicher Teil der von ihnen erzeugten Signalgrundpegel sich gegenseitig kompensieren, wenn der Sensor aus gegenphasig geschalteten Bauelementen aufgebaut ist. A particularly good suppression of the background radiation is achieved through the formation of radiation lobes. Such The arrangement is shown schematically in FIG. 2. Here are from a transmitter SE, which in this case also serves as room lighting serves to emit light beams LS, which is a transmitter side Generate radiation beam KS. This encloses at least two adjacent radiation lobes K1, K2 on the receiver side with the help of suitable optical means OM from a receiver EM be generated. These are precisely defined areas from which reflected light radiation LS to the receiver EM. Since the radiation lobes K1, K2 by shape and size largely agree, one can assume that also at an essential one if the background is not homogeneously reflective Part of the basic signal levels generated by each other compensate if the sensor consists of components connected in phase opposition is constructed.

In Fig. 3 ist schematisch eine Anordnung dargestellt, die es gestattet, eine Raumbeleuchtung 5 automatisch ein- und auszuschalten. Hierzu ist eine Lichtstrahlen 6 emittierende Raumbeleuchtung 5 mit einem Beleuchtungsschalter 4 verbunden, der über eine Auswerteelektronik 3 aktiviert werden kann. Letztere erhält ihre Eingabesignale von einem ersten Bewegungsmelder 1 und einem zweiten Bewegungsmelder 2. Der zweite Bewegungsmelder kann ein üblicher Passiv-Infrarot-Bewegungsmelder sein, der die Bewegungen eines bewegten Objektes 7 registriert und die Auswerteelektronik 3 ggf. veranlaßt, den Beleuchtungsschalter 4 einzuschalten. Demgegenüber ist der erste Bewegungsmelder 1 so ausgelegt, daß er im Frequenzbereich sichtbaren Lichtes arbeitet und auf reflektierte Lichtstrahlen 8 anspricht, die mit Hilfe der emittierten Lichtstrahlen 6 an einem reflektierenden Körper 7 erzeugt werden. Bewegt sich dieser reflektierende Körper 7 vor einem im wesentlichen homogenen Hintergrund, so kann mit den bereits beschriebenen Maßnahmen die Empfindlichkeit des ersten Bewegungsmelders 1, der ohnehin auf Grund seiner Bauart dem zweiten Bewegungsmelder 2 überlegen ist, weiter erhöht werden. Dieser wird somit auch auf kleinste durch den bewegten Körper 7 hervorgerufene Strahlungsänderungen reagieren. Beim Fehlen der Strahlungsänderungen kann somit der erste Bewegungsmelder 1 nach einer angemessenen Verzögerungszeit die Auswerteelektronik 3 dazu veranlassen, den Beleuchtungsschalter 4 abzuschalten. Bisweilen wird man jedoch daran interessiert sein, die Automatik durch eine Handbetätigung zu ersetzen und lieber einen hierfür vorgesehenen Handschalter 10 betätigen. Dieser Handschalter 10 ist im vorliegenden Fall in den Beleuchtungsschalter integriert und so codiert, daß er bei zweimaligem kurzen Tastendruck die Abschaltautomatik außer Kraft setzt.In Fig. 3 an arrangement is shown schematically, which allows automatically switch room lighting 5 on and off. For this purpose, there is room lighting that emits light rays 6 5 connected to a lighting switch 4, which via a Evaluation electronics 3 can be activated. The latter receives her Input signals from a first motion detector 1 and one second motion detector 2. The second motion detector can be a usual passive infrared motion detector that detects the movements a moving object 7 registered and the evaluation electronics 3 possibly causes the lighting switch 4 to be switched on. In contrast, the first motion detector 1 is designed that it works in the frequency range of visible light and responsive to reflected light rays 8, which with the help of emitted light beams 6 on a reflective body 7 be generated. This reflecting body 7 moves forward an essentially homogeneous background, so with the already measures described the sensitivity of the first motion detector 1, the second anyway due to its design Motion detector 2 is superior to be further increased. This is thus even the smallest by the moving body 7 caused radiation changes react. In the absence of the The first motion detector 1 can thus detect changes in radiation an appropriate delay time the evaluation electronics 3 cause the lighting switch 4 to turn off. Sometimes however, one will be interested in the automatic to be replaced by a manual control and rather one for this Operate the provided hand switch 10. This hand switch 10 is integrated in the lighting switch in the present case and coded in such a way that when the button is pressed twice briefly, the Automatic shutdown overrides.

Claims (11)

  1. A switching device with at least one optoelectric motion detector (1, 2) which allows the automatic actuation of a lighting switch (4) by detecting changes in the luminous radiation initiated by the movement of an object (7) within a monitored room and which can switch on the room lighting (5) in the presence of a movement and/or can switch off the room lighting within a predetermined period of time in case of lack of a movement, characterized in that
    the room lighting (5) is used as a radiation source for the luminous radiation (6) as detected by the first motion detector (1);
    the first motion detector (1) operates in the frequency range of the visible light;
    the first motion detector (1) is arranged in such a way that it detects movements in a portion of the room which is to be monitored and is illuminated by the room lighting (5) and
    the first motion detector (1) causes a cut-off of the room illumination (5) if within the predetermined period of time it does not recognize any significant change in the luminous radiation (8) of the room lighting (5) which is reflected by the object.
  2. A switching device as claimed in claim 1, characterized in that at least two first motion detectors (1) are arranged in such a way that they scan separate room areas which optionally overlap one another and a cut-off of the room lighting occurs when all motion detectors (1) do not register any movement anymore.
  3. A switching device as claimed in one of the preceding claims, characterized in that at least one second motion detector (2), preferably a passive infrared motion detector, is provided which causes the room lighting to be switched on when movements are detected by the same.
  4. A switching device as claimed in one of the preceding claims, characterized in that the first motion detector (1) also detects heat radiation (9) emitted by moving radiation objects in addition to the reflected luminous radiation emitted by the room lighting and will cause the room lighting (5) to be switched on in case of any movements.
  5. A switching device as claimed in one of the preceding claims, characterized in that a manually operable switch (10) is provided which is integrated in the switching device in such a way that any switching on or off of the room lighting (5) can optionally occur by hand.
  6. A switching device as claimed in claim 5, characterized in that the automatic cut-off of the room illumination (5) can be blocked by a specific mode of switch actuation with the help of the manually operable switch (10).
  7. A switching device as claimed in one of the preceding claims, characterized in that the first motion detector (1) comprises at least one optoelectric sensor (S) for receiving luminous radiation (6) and that optical means (OM) are provided which form at least two radiation lobes (K1, K2) within the room area to be monitored, which lobes are approximately similar according to shape and size and cause receiving signals with a static basic signal level on the optoelectric sensor (S) and that the receiving signals are supplied by at least two adjacent signal lobes (K1, K2) in phase opposition to a downstream electronic analysing unit (E) in such a way that the static basic signal levels compensate one another at least partly and only a differential signal remains.
  8. A switching device as claimed in claim 7, characterized in that for compensating the basic signal levels the optoelectric sensor (S) is formed with the help of two or an integral multiple of two photosensitive components (LE1, LE2) which are disposed homopolar in series and an amplifier (V) connected on the input side with the centre tapping of the series connection in such a way that a differential signal is obtained from the two parts of the series connection.
  9. A switching device as claimed in claim 7, characterized in that each of the two photosensitive components (LE1, LE2) consists of a parallel connection of at least two photosensitive single elements, with the number of the single elements being the same in both components.
  10. A switching device as claimed in one of the preceding claims, characterized in that lenses and/or mirrors and/or diaphragms are used for forming the radiation lobes (K1, K2) and that the same are arranged in such a way that a shape and size of the radiation lobes (K1, K2) can be realized which correspond to the respective requirements.
  11. A switching device as claimed in one of the preceding claims 8 to 10, characterized in that the photosensitive components (LE1, LE2) which are suitable for receiving the radiation in phase opposition are arranged multiply within the first motion detector (1), preferably in form of a strip or a matrix, optionally uncoupled by an amplifier.
EP96108423A 1995-06-02 1996-05-28 Switching device for automatically controlling a lighting switch Expired - Lifetime EP0745962B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19520241 1995-06-02
DE19520241A DE19520241A1 (en) 1995-06-02 1995-06-02 Switching device that enables automatic actuation of a lighting switch

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EP0745962A1 EP0745962A1 (en) 1996-12-04
EP0745962B1 true EP0745962B1 (en) 2000-02-02

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AT (1) ATE189548T1 (en)
DE (2) DE19520241A1 (en)

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EP0745962A1 (en) 1996-12-04
DE19520241A1 (en) 1996-12-05
DE59604344D1 (en) 2000-03-09
ATE189548T1 (en) 2000-02-15

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