EP1014324B1 - PIR detector - Google Patents
PIR detector Download PDFInfo
- Publication number
- EP1014324B1 EP1014324B1 EP98120564A EP98120564A EP1014324B1 EP 1014324 B1 EP1014324 B1 EP 1014324B1 EP 98120564 A EP98120564 A EP 98120564A EP 98120564 A EP98120564 A EP 98120564A EP 1014324 B1 EP1014324 B1 EP 1014324B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pir
- radiation
- transmitting diode
- detector
- screening means
- 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.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/04—Monitoring of the detection circuits
- G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation 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
- G08B13/183—Actuation 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 interruption of a radiation beam or barrier
Definitions
- the invention relates to a PIR detector according to the preamble of claim 1.
- Such a PIR detector is known from EP-A-0 556 898.
- the detector receives a small amount of scatter Radiation from the transmitter diode.
- This stray radiation comes both from the window film of the PIR detector, this one can have certain texture or roughness, as well as that Entry windows delimiting housing webs and finally of objects located in the vicinity.
- Will the Target value of the received scattered radiation undershot, see above this is seen as a change in the scattering properties of the Housing bars or the window film interpreted. This is e.g. possible due to spraying with varnish, whereby the Window film to be made impermeable to IR radiation can. If the setpoint is exceeded, this is called Signs of the presence of a covering object in interpreted in the immediate vicinity of the PIR detector.
- the invention has the task of the generic PIR detector to improve in this regard.
- the task is carried out by a PIR detector with the characterizing part of claim 1 mentioned features solved.
- the essence of the invention is that from the lateral emitting diode aperture opening and to Monitoring the window film used radiation targeted can be measured.
- the arrangement and construction of the two panels ensure that through the side Opening of the detector aperture only from the transmitter diode emitted from the side transmitter diode aperture emerging radiation and then scattered on the window film arrives and is received by the detector.
- the setpoint of the Scattered radiation received by the detector corresponds to that of emitted by the transmitter diode and then on the window film scattered radiation when the PIR detector is operating undisturbed. If the reflectivity of the window film changes, such as. after spraying with hairspray or clear coat, see above the actual value deviates from the setpoint. This deviation will recognized as malfunction of the window film.
- the transmitter diode diaphragm preferably comprises a part of the Deflecting radiation in the direction of the transmitter diode aperture Device (claim 2).
- the redirecting Device in the beam path of the emitted radiation is arranged, a targeted portion of the emitted radiation to monitor the window film use.
- the deflecting device expediently consists of an Interior of the transmitter diode diaphragm approximately at the level of its side Opening arranged, at least partially reflective Area (claim 3). This enables the redirecting To form the device in one piece with the screen (claim 4).
- the partially reflecting surface can be the inner side away from the transmitter diode Form boundary of the lateral opening (claim 5).
- the PIR detector can the partially reflecting surface is also spherical be curved (claim 7).
- the side opening of the transmitter diode diaphragm can Have edge boundaries in the direction of the detector aperture intercepts emerging radiation (claim 8). This is necessary if there is a possibility that radiation on direct path towards the detector aperture becomes.
- the transmitter diode diaphragm is at least advantageous on the outside at least partially in the area of the lateral opening radiation absorbing (claim 9). So that is achieved that there is no radiation at these areas Detector aperture is scattered.
- the main axes of the panels can easily be against each other be inclined and an angle between 8 and 20 ° include (claim 10). This is particularly advantageous if the close range in front of the PIR detector against any Faults such as the presentation of objects are monitored shall be. In this case, the face ends of the bezels open.
- the monitoring area can e.g. limited to 40 cm his.
- the emitter diodes and the detector diaphragm can be mutually related be mirror-symmetrical (claim 11).
- the PIR detector according to FIGS. 1 and 2 comprises a housing 1 with a concave, i.e. towards the interior of the housing arched window from a for infrared radiation permeable window film 2.
- a concave i.e. towards the interior of the housing arched window from a for infrared radiation permeable window film 2.
- the aperture consists of a Shield 26 and a cover 27.
- the shield 26 is in one piece with a frame 21 of the window film 2.
- Die Shield 26 and cover 27 define one tubular cavity in which a transmitting diode 28 is arranged is.
- the cover 27 has an end opening 29 which with an end opening 4 of the housing 1 in the area the center plane of the window film 2 is aligned.
- a detector area 23 On the opposite side of the window film 2 is mirror-symmetrical to the transmitter diode region 22 behind one Section 3 '(hidden in FIG. 1) of a detector area 23.
- This consists of a shield integral with the frame 21 26 ', a cover 27' and a detector 28 'in Form of an IR sensitive photodiode.
- the cover 27 ' has an end opening 29 'with a front opening 4 'of the housing 1 in the area of Center plane of the window film 2 is aligned.
- the frame 21 has for fastening in the housing 1 tabs 24 and Fixing the window film 2 on the frame mandrels 25, the Pass through holes in window film 2.
- the housing 1 is formed on the inside so that the cover 27 'between the shield 26 'and the housing 1 is fixed.
- Fig. 3 represents the beam path between that in the Transmitting diode diaphragm arranged transmitting diode 28 and in the Detector aperture arranged detector 28 'schematically.
- the radiation is emitted by the transmitter diode 28 and on a deflection surface 31 through an opening 32 in the direction of Window film 2 steered.
- Radiation is scattered and at least partially falls through Opening 32 'on a deflection surface 31' of the detector aperture, where it is deflected in the direction of the detector 28 '.
- the beam path follows the lines 35, 36, 37, 38.
- the dimension L denotes the monitored width of the window film 2.
- FIG. 4 shows how the ones shown in FIG. 2 are Components are arranged in the housing 1.
- the frame 21 with the window film 2 fixed on this has internal dimensions, a cutout 41 in the housing 1 correspond. It attaches positively to the housing 1 and is over the tabs 24 which are clamped in protrusions 42 are attached to it.
- the one not shown here Transmitter diode diaphragm lies behind the cutout 3.
- In the Housing 1 is also a segmented mirror 44 and a circuit board 43 for the processing circuit, e.g. fixed in the housing 1 via a fastening means 55 are. Both are state of the art and therefore will not explained in more detail.
- Fig. 5 shows a partial section of the PIR detector along the Line V-V in Fig. 1, namely the arrangement of the detector 28 ' in the shield 26 'and the cover 27' existing aperture.
- scattered radiation falls into the side Opening 32 ', meets one on cover 27' trained deflection surface 31 'and is there in the direction of Detector 28 'deflected.
- the shield 26 ' is on the Window film 2 facing side stepped and radiation absorbing. As a result, the window film 2 is scattered and absorbs radiation incident on the shield 26 '.
- the shielding means 34 'against the side opening 32' against from the side opening 32 of the transmitter diode diaphragm emerging radiation which is directly, i.e. without Scatter at the far window 2, reach the detector aperture would be from one. Edge of the housing 1 is formed.
- the face has the opening 29 'through which in the close range (up to a distance of about 40 cm) of the PIR detector scattered radiation from the transmitter diode was emitted and through the front opening 29 of the Transmitting diode diaphragm has escaped, passes through. Thereby the close range is also protected against operational disturbances, e.g. the presentation of objects, monitored.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
- Measurement Of Radiation (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
Description
Die Erfindung betrifft einen PIR-Melder nach dem Oberbegriff des Anspruchs 1.The invention relates to a PIR detector according to the preamble of claim 1.
Ein solcher PIR-Melder ist aus der EP-A-0 556 898 bekannt. Der Detektor empfängt einen geringen Streuanteil der Strahlung der Sendediode. Diese Streustrahlung kommt sowohl von der Fensterfolie des PIR-Detektors, die hierzu eine gewisse Textur bzw. Rauhigkeit haben kann, als auch von das Eintrittsfenster begrenzenden Gehäusestegen und schließlich von etwa im Nahbereich befindlichen Gegenständen. Wird der Sollwert der empfangenen Streustrahlung unterschritten, so wird dies als Veränderung der Streueigenschaften der Gehäusestege oder der Fensterfolie interpretiert. Dies ist z.B. infolge Besprühens mit Lack möglich, wodurch die Fensterfolie für IR-Strahlung undurchlässig gemacht werden kann. Wird der Sollwert überschritten, so wird dies als Anzeichen für das Vorhandensein eines abdeckenden Objekts in unmittelbarer Nähe des PIR-Melders interpretiert.Such a PIR detector is known from EP-A-0 556 898. The detector receives a small amount of scatter Radiation from the transmitter diode. This stray radiation comes both from the window film of the PIR detector, this one can have certain texture or roughness, as well as that Entry windows delimiting housing webs and finally of objects located in the vicinity. Will the Target value of the received scattered radiation undershot, see above this is seen as a change in the scattering properties of the Housing bars or the window film interpreted. This is e.g. possible due to spraying with varnish, whereby the Window film to be made impermeable to IR radiation can. If the setpoint is exceeded, this is called Signs of the presence of a covering object in interpreted in the immediate vicinity of the PIR detector.
Bei dem bekannten PIR-Melder ist es schwierig, gezielte Anteile der emittierten und der empfangenen Strahlung der Fensterfolie bzw. dem überwachten Nahbereich zuzuordnen.With the well-known PIR detector, it is difficult to target Portions of the emitted and received radiation from the Assign window film or the monitored close range.
Die Erfindung hat die Aufgabe, den gattungsgemäßen PIR-Melder in dieser Hinsicht zu verbessern.The invention has the task of the generic PIR detector to improve in this regard.
Die Aufgabe wird durch einen PIR-Melder mit den im kennzeichnenden Teil des Anspruchs 1 genannten Merkmalen gelöst. The task is carried out by a PIR detector with the characterizing part of claim 1 mentioned features solved.
Der Kern der Erfindung liegt darin, daß die aus der seitlichen Sendediodenblendenöffnung austretende und zur Überwachung der Fensterfolie verwendete Strahlung gezielt bemessen werden kann. Die Anordnung und die Konstruktion der beiden Blenden gewährleisten, daß durch die seitliche Öffnung der Detektorblende nur von der Sendediode emittierte, aus der seitlichen Sendediodenblendenöffnung austretende und dann an der Fensterfolie gestreute Strahlung gelangt und vom Detektor empfangen wird. Der Sollwert der vom Detektor empfangenen Streustrahlung entspricht der von der Sendediode emittierten und dann an der Fensterfolie gestreuten Strahlung bei ungestörtem Betrieb des PIR-Melders. Verändert sich die Reflektivität der Fensterfolie, wie z.B. nach Besprühen mit Haarspray oder Klarlack, so weicht der Istwert vom Sollwert ab. Diese Abweichung wird als Betriebsstörung der Fensterfolie erkannt.The essence of the invention is that from the lateral emitting diode aperture opening and to Monitoring the window film used radiation targeted can be measured. The arrangement and construction of the two panels ensure that through the side Opening of the detector aperture only from the transmitter diode emitted from the side transmitter diode aperture emerging radiation and then scattered on the window film arrives and is received by the detector. The setpoint of the Scattered radiation received by the detector corresponds to that of emitted by the transmitter diode and then on the window film scattered radiation when the PIR detector is operating undisturbed. If the reflectivity of the window film changes, such as. after spraying with hairspray or clear coat, see above the actual value deviates from the setpoint. This deviation will recognized as malfunction of the window film.
Bevorzugt umfaßt die Sendediodenblende eine einen Teil der Strahlung in Richtung der Sendediodenblendenöffnung umlenkende Vorrichtung (Anspruch 2). Durch die umlenkende Vorrichtung, die im Strahlengang der emittierten Strahlung angeordnet ist, läßt sich ein gezielter Anteil der emittierten Strahlung zur Überwachung der Fensterfolie verwenden.The transmitter diode diaphragm preferably comprises a part of the Deflecting radiation in the direction of the transmitter diode aperture Device (claim 2). By the redirecting Device in the beam path of the emitted radiation is arranged, a targeted portion of the emitted radiation to monitor the window film use.
Zweckmäßig besteht die umlenkende Vorrichtung aus einer im Innenraum der Sendediodenblende etwa in Höhe deren seitlicher Öffnung angeordneten, zumindest teilweise reflektierenden Fläche (Anspruch 3). Dies ermöglicht es, die umlenkende Vorrichtung einstückig mit der Blende auszubilden (Anspruch 4).The deflecting device expediently consists of an Interior of the transmitter diode diaphragm approximately at the level of its side Opening arranged, at least partially reflective Area (claim 3). This enables the redirecting To form the device in one piece with the screen (claim 4).
Insbesondere kann die teilweise reflektierende Fläche die von der Sendediode entfernter liegende, innenseitige Begrenzung der seitlichen Öffnung bilden (Anspruch 5). In particular, the partially reflecting surface can be the inner side away from the transmitter diode Form boundary of the lateral opening (claim 5).
Um zu gewährleisten, daß weite Bereiche der Fensterfolie mit von der Sendediode emittierter Strahlung beleuchtet werden, kann sich an die teilweise reflektierende Fläche mindestens eine weitere, umlenkend wirkende Fläche anschließen (Anspruch 6).To ensure that large areas of the window film with radiation emitted by the transmitter diode is illuminated, can at least adhere to the partially reflective surface connect another deflecting surface (Claim 6).
Bei einer alternativen Ausführungsform des PIR-Melders kann die teilweise reflektierend wirkende Fläche auch sphärisch gekrümmt sein (Anspruch 7).In an alternative embodiment the PIR detector can the partially reflecting surface is also spherical be curved (claim 7).
Die seitliche Öffnung der Sendediodenblende kann eine Randbegrenzung haben, die in Richtung der Detektorblende austretende Strahlung abfängt (Anspruch 8). Dies ist notwendig, wenn die Möglichkeit besteht, daß Strahlung auf direktem Weg in Richtung Detektorblendenöffnung gelenkt wird.The side opening of the transmitter diode diaphragm can Have edge boundaries in the direction of the detector aperture intercepts emerging radiation (claim 8). This is necessary if there is a possibility that radiation on direct path towards the detector aperture becomes.
Vorteilhaft ist die Sendediodenblende außenseitig zumindest im Bereich der seitlichen Öffnung zumindest teilweise strahlungsabsorbierend (Anspruch 9). Damit wird erreicht, daß an diesen Bereichen keine Strahlung in Richtung Detektorblendenöffnung gestreut wird.The transmitter diode diaphragm is at least advantageous on the outside at least partially in the area of the lateral opening radiation absorbing (claim 9). So that is achieved that there is no radiation at these areas Detector aperture is scattered.
Die Hauptachsen der Blenden können leicht gegeneinander geneigt sein und einen Winkel zwischen 8 und 20° einschließen (Anspruch 10). Dies ist besonders vorteilhaft, wenn der Nahbereich vor dem PIR-Melder gegen etwaige Störungen wie das Vorstellen von Gegenständen überwacht werden soll. In diesem Fall sind die Stirnseiten der Blenden offen. Der Überwachungsbereich kann z.B. auf 40 cm begrenzt sein.The main axes of the panels can easily be against each other be inclined and an angle between 8 and 20 ° include (claim 10). This is particularly advantageous if the close range in front of the PIR detector against any Faults such as the presentation of objects are monitored shall be. In this case, the face ends of the bezels open. The monitoring area can e.g. limited to 40 cm his.
Die Sendedioden- und die Detektorblende können zueinander spiegelsymmetrisch sein (Anspruch 11). The emitter diodes and the detector diaphragm can be mutually related be mirror-symmetrical (claim 11).
In der Zeichnung ist ein Ausführungsbeispiel nach der Erfindung schematisch vereinfacht dargestellt. Es zeigt:
- Fig. 1
- einen PIR-Melder nach der Erfindung;
- Fig. 2
- die für die Störungsüberwachung wesentlichen Bestandteile des PIR-Melders nach Fig. 1 in Explosionsdarstellung;
- Fig. 3
- eine schematische Darstellung des Strahlengangs zwischen Sendediode und Detektor;
- Fig. 4
- einen Schnitt entlang der Linie IV-IV in Fig. 1;
- Fig. 5
- einen Schnitt entlang der Linie V-V in Fig. 1;
- Fig. 1
- a PIR detector according to the invention;
- Fig. 2
- the parts of the PIR detector according to FIG. 1 essential for fault monitoring in an exploded view;
- Fig. 3
- a schematic representation of the beam path between the transmitter diode and detector;
- Fig. 4
- a section along the line IV-IV in Fig. 1;
- Fig. 5
- a section along the line VV in Fig. 1;
Der PIR-Melder nach Fig. 1 und Fig. 2 umfaßt ein Gehäuse 1
mit einem konkaven, also in Richtung des Gehäuseinneren
gewölbten Fenster aus einer für Infrarotstrahlung
durchlässigen Fensterfolie 2. Im Bereich der Mittelebene der
Fensterfolie 2 hat die begrenzende Gehäusewandfläche einen
Ausschnitt 3, hinter dem ein Sendediodenbereich 22 mit einer
Blende angeordnet ist. Die Blende besteht aus einer
Abschirmung 26 und einer Abdeckung 27. Die Abschirmung 26
ist einstückig mit einem Rahmen 21 der Fensterfolie 2. Die
Abschirmung 26 und die Abdeckung 27 begrenzen einen
rohrförmigen Hohlraum, in dem eine Sendediode 28 angeordnet
ist. Die Abdeckung 27 hat eine stirnseitige Öffnung 29, die
mit einer stirnseitigen Öffnung 4 des Gehäuses 1 im Bereich
der Mittelebene der Fensterfolie 2 fluchtet. Auf der
gegenüberliegenden Seite des Fensterfolie 2 liegt spiegelsymmetrisch
zu dem Sendediodenbereich 22 hinter einem
Ausschnitt 3' (in Fig. 1 verdeckt) ein Detektorbereich 23.
Dieser besteht aus einer mit dem Rahmen 21 einstückigen Abschirmung
26', einer Abdeckung 27' und einem Detektor 28' in
Form einer IR-empfindlichen Photodiode. Die Abdeckung 27'
hat eine stirnseitige Öffnung 29', die mit einer
stirnseitigen Öffnung 4' des Gehäuses 1 im Bereich der
Mittelebene der Fensterfolie 2 fluchtet. Der Rahmen 21 hat
zur Befestigung in dem Gehäuse 1 Laschen 24 und zur
Fixierung der Fensterfolie 2 auf dem Rahmen Dorne 25, die
Löcher der Fensterfolie 2 durchgreifen. Das Gehäuse 1 ist
innenseitig so ausgebildet, daß die Abdeckung 27' zwischen
der Abschirmung 26' und dem Gehäuse 1 fixiert ist.The PIR detector according to FIGS. 1 and 2 comprises a housing 1
with a concave, i.e. towards the interior of the housing
arched window from a for infrared radiation
Fig. 3 stellt den Strahlengang zwischen der in der
Sendediodenblende angeordneten Sendediode 28 und dem in der
Detektorblende angeordneten Detektor 28' schematisch dar.
Die Strahlung wird von der Sendediode 28 emittiert und an
einer Umlenkfläche 31 durch eine Öffnung 32 in Richtung der
Fensterfolie 2 gelenkt. An der Fensterfolie 2 wird die
Strahlung gestreut und fällt zumindest teilweise durch eine
Öffnung 32' auf eine Umlenkfläche 31' der Detektorblende, wo
sie in Richtung des Detektors 28' umgelenkt wird. Der
Strahlengang folgt dabei den Linien 35, 36, 37, 38. Das Maß
L bezeichnet die überwachte Breite der Fensterfolie 2. Damit
keine aus der Sendediodenblendenöffnung tretende Strahlung
auf direktem Weg in die Detektorblendenöffnung eintreten
kann, ist die direkte Sichtlinie 39 von einem Abschirmmittel
in Form der Kante 34 an der Sendediodenblende und einem
Abschirmmittel in Form der Kante 34' an der Detektorblende
unterbrochen. Die stirnseitigen Öffnungen 29 bzw. 29' der
beiden Blenden dienen der Überwachung des Nahbereichs vor
dem PIR-Melder.Fig. 3 represents the beam path between that in the
Transmitting diode diaphragm arranged transmitting
Fig. 4 ist zu entnehmen, wie die in Fig. 2 dargestellten
Bauteile in dem Gehäuse 1 angeordnet sind. Der Rahmen 21 mit
der auf diesem fixierten Fensterfolie 2 hat Innenabmessungen,
die einem Ausschnitt 41 in dem Gehäuse 1
entsprechen. Er fügt sich formschlüssig an das Gehäuse 1 an
und ist über die Laschen 24, die in Vorsprünge 42 geklemmt
sind, an diesem befestigt. Die hier nicht dargestellte
Sendediodenblende liegt hinter dem Ausschnitt 3. In dem
Gehäuse 1 befinden sich ferner ein segmentierter Spiegel 44
und eine Platine 43 für die Verarbeitungsschaltung, die z.B.
über ein Befestigungsmittel 55 in dem Gehäuse 1 fixiert
sind. Beides ist Stand der Technik und wird daher nicht
näher erläutert.FIG. 4 shows how the ones shown in FIG. 2 are
Components are arranged in the housing 1. The
Fig. 5 zeigt einen Teilschnitt des PIR-Melders entlang der
Linie V-V in Fig. 1, nämlich die Anordnung des Detektors 28'
in der aus der Abschirmung 26' und der Abdeckung 27'
bestehenden Blende. Die Abschirmung 26' und die Abdeckung
27' begrenzen die seitliche Öffnung 32' der Blende. An der
Fensterfolie 2 gestreute Strahlung fällt in die seitliche
Öffnung 32', trifft auf eine an der Abdeckung 27'
ausgebildete Umlenkfläche 31' und wird dort in Richtung des
Detektors 28' umgelenkt. Die Abschirmung 26' ist auf der der
Fensterfolie 2 zugewandten Seite gestuft und strahlungsabsorbierend.
Dadurch wird an der Fensterfolie 2 gestreute
und auf die Abschirmung 26' treffende Strahlung absorbiert.
Das Abschirmmittel 34' vor der seitlichen Öffnung 32' gegen
aus der seitlichen Öffnung 32 der Sendediodenblende
austretende Strahlung, die auf direktem Weg, d.h. ohne
Streuung am Fernster 2, die Detektorblendenöffnung erreichen
würde, wird von einer. Kante des Gehäuses 1 gebildet.
Stirnseitig weist die Blende die Öffnung 29' auf, durch die
im Nahbereich (in einer Entfernung bis etwa 40 cm) des PIR-Melders
gestreute Strahlung, die von der Sendediode
emittiert wurde und durch die stirnseitige Öffnung 29 der
Sendediodenblende ausgetreten ist, hindurchtritt. Dadurch
wird auch der Nahbereich gegen Betriebsstörungen, wie z.B.
das Vorstellen von Gegenständen, überwacht.Fig. 5 shows a partial section of the PIR detector along the
Line V-V in Fig. 1, namely the arrangement of the detector 28 '
in the shield 26 'and the cover 27'
existing aperture. The shield 26 'and the cover
27 'delimit the lateral opening 32' of the diaphragm. At the
Claims (11)
- An PIR signalling device comprising a window foil (2), a PIR sensor arranged therebehind, with associated electronic evaluation means, as well as a transmitting diode (28), a detector (28') for radiation received from the transmitting diode (28) after scattering, and a circuit which compares the actual value of the detected radiation to a reference value, characterised in that the transmitting diode (28) and the detector (28') are disposed in tubular screening means which are spaced from each other and which are disposed beside the window foil (2), that the transmitting diode screening means has a lateral opening (32) for the exit of a part of the transmitting diode radiation, and that the detector screening means has a lateral opening (32') for the entry only of radiation scattered at the window foil (2).
- A PIR signalling device according to claim 1 characterised in that the transmitting diode screening means includes a device which deflects a part of the radiation in the direction of the opening of the transmitting diode screening means.
- A PIR signalling device according to claim 2 characterised in that the deflecting device comprises an at least partially reflective surface (31) arranged in the interior of the transmitting diode screening means approximately at the height of the lateral opening thereof.
- A PIR signalling device according to claim 3 characterised in that the partially reflective surface is an integral component of the transmitting diode screening means.
- A PIR signalling device according to claim 3 or claim 4 characterised in that the partially reflective surface (31) is the inward boundary of the lateral opening, which boundary is more remote from the transmitting diode.
- A PIR signalling device according to one of claims 3 to 5 characterised in that at least one further surface having a deflecting action adjoins the partially reflective surface (31).
- A PIR signalling device according to one of claims 3 to 6 characterised in that at least the surface which has a partially reflective action is spherically curved.
- A PIR signalling device according to one of claims 1 to 7 characterised in that the lateral opening of the transmitting diode screening means has an edge boundary (34) which captures radiation issuing in the direction of the detector screening means.
- A PIR signalling device according to one of claims 1 to 8 characterised in that the transmitting diode screening means is at least partially radiation-absorbent on the outside at least in the region of the lateral opening.
- A PIR signalling device according to one of claims 1 to 9 characterised in that the main axes of the screening means are slightly inclined relative to each other and include an angle of between 8 and 20°.
- A PIR signalling device according to one of claims 1 to 10 characterised in that the transmitting diode and detector screening means involve mirror image symmetry relative to each other.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737166A DE19737166C2 (en) | 1997-08-26 | 1997-08-26 | PIR |
| ES98120564T ES2190029T3 (en) | 1997-08-26 | 1998-10-29 | PIR NOTICE |
| AT98120564T ATE230878T1 (en) | 1997-08-26 | 1998-10-29 | PIR DETECTOR |
| EP98120564A EP1014324B1 (en) | 1997-08-26 | 1998-10-29 | PIR detector |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737166A DE19737166C2 (en) | 1997-08-26 | 1997-08-26 | PIR |
| EP98120564A EP1014324B1 (en) | 1997-08-26 | 1998-10-29 | PIR detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1014324A1 EP1014324A1 (en) | 2000-06-28 |
| EP1014324B1 true EP1014324B1 (en) | 2003-01-08 |
Family
ID=55306378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98120564A Expired - Lifetime EP1014324B1 (en) | 1997-08-26 | 1998-10-29 | PIR detector |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1014324B1 (en) |
| AT (1) | ATE230878T1 (en) |
| DE (1) | DE19737166C2 (en) |
| ES (1) | ES2190029T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001228020A (en) † | 2000-02-18 | 2001-08-24 | Optex Co Ltd | Crime prevention sensor with obstruction detecting function |
| GB2521945B (en) * | 2011-09-30 | 2016-02-10 | Avire Ltd | Edge device |
| US9123222B2 (en) | 2012-03-15 | 2015-09-01 | Ninve Jr. Inc. | Apparatus and method for detecting tampering with an infra-red motion sensor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1241278B (en) * | 1990-10-19 | 1993-12-29 | Elkron Spa | ANTI-BLINDING DEVICE FOR COMPONENTS OF SECURITY SYSTEMS. |
| NL9200283A (en) * | 1992-02-17 | 1993-09-16 | Aritech Bv | MONITORING SYSTEM. |
| JP2983423B2 (en) * | 1993-12-21 | 1999-11-29 | オプテックス株式会社 | Infrared human body detector |
| IL110800A0 (en) * | 1994-08-28 | 1995-07-31 | Visonic Ltd | Improved intrusion detector with obscuring detection apparatus |
| EP0772171B1 (en) * | 1995-11-03 | 2003-01-08 | Siemens Building Technologies AG | Passive intrusion detector and its use |
| NL1003500C2 (en) * | 1996-07-04 | 1998-01-07 | Aritech Bv | Monitoring system with light-guiding means. |
-
1997
- 1997-08-26 DE DE19737166A patent/DE19737166C2/en not_active Expired - Lifetime
-
1998
- 1998-10-29 ES ES98120564T patent/ES2190029T3/en not_active Expired - Lifetime
- 1998-10-29 AT AT98120564T patent/ATE230878T1/en active
- 1998-10-29 EP EP98120564A patent/EP1014324B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1014324A1 (en) | 2000-06-28 |
| ATE230878T1 (en) | 2003-01-15 |
| DE19737166C2 (en) | 2002-04-25 |
| DE19737166A1 (en) | 1999-03-11 |
| ES2190029T3 (en) | 2003-07-16 |
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