EP1014324A1 - PIR-Melder - Google Patents
PIR-Melder Download PDFInfo
- Publication number
- EP1014324A1 EP1014324A1 EP98120564A EP98120564A EP1014324A1 EP 1014324 A1 EP1014324 A1 EP 1014324A1 EP 98120564 A EP98120564 A EP 98120564A EP 98120564 A EP98120564 A EP 98120564A EP 1014324 A1 EP1014324 A1 EP 1014324A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiation
- diode
- pir
- detector according
- detector
- 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
Links
Images
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 impervious 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 the from lateral emitting diode aperture opening and to Monitoring the window film used radiation specifically 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 of the 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 reflective surface can 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 be 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 'which with a frontal 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 the in the Transmitting diode aperture arranged transmitting diode 28 and that 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 directed.
- 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 those shown in FIG. 2 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 Transmitting 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.
- 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 lateral 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 formed by an edge of the housing 1.
- the face has the opening 29 'through which in the close range (at a distance of up to 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.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
- Fire-Detection Mechanisms (AREA)
- Measurement Of Radiation (AREA)
Abstract
Description
- 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;
Claims (11)
- PIR-Melder mit einer Fensterfolie (2), einem dahinter angeordneten PIR-Sensor mit zugehöriger Auswerteelektronik, sowie einer Sendediode (28), einem Detektor (28') für von der Sendediode (28) nach Streuung empfangener Strahlung und einer Schaltung, die den Istwert der detektierten Strahlung mit einem Sollwert vergleicht, dadurch gekennzeichnet, daß die Sendediode (28) und der Detektor (28') sich in voneinander beabstandeten und neben der Fensterfolie (2) liegenden, rohrförmigen Blenden befinden, daß die Sendediodenblende eine seitliche Öffnung (32) zum Austritt eines Teils der Sendediodenstrahlung hat, und daß die Detektorblende eine seitliche Öffnung (32') zum Eintritt nur von an der Fensterfolie (2) gestreuter Strahlung hat.
- PIR-Melder nach Anspruch 1, dadurch gekennzeichnet, daß die Sendediodenblende eine einen Teil der Strahlung in Richtung der Sendediodenblendenöffnung umlenkende Vorrichtung umfaßt.
- PIR-Melder nach Anspruch 2, dadurch gekennzeichnet, daß die umlenkende Vorrichtung aus einer im Innenraum der Sendediodenblende etwa in Höhe deren seitlicher Öffnung angeordneten zumindest teilweise reflektierenden Fläche (31) besteht.
- PIR-Melder nach Anspruch 3, dadurch gekennzeichnet, daß die teilweise reflektierende Fläche ein einstückiger Bestandteil der Sendediodenblende ist.
- PIR-Melder nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die teilweise reflektierende Fläche (31) die von der Sendediode entfernter liegende, innenseitige Begrenzung der seitlichen Öffnung bildet.
- PIR-Melder nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß sich an die teilweise reflektierende Fläche (31) mindestens eine weitere umlenkend wirkende Fläche anschließt.
- PIR-Melder nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß mindestens die teilweise reflektierend wirkende Fläche sphärisch gekrümmt ist.
- PIR-Melder nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die seitliche Öffnung der Sendediodenblende eine Randbegrenzung (34) hat, die in Richtung der Detektorblende austretende Strahlung abfängt.
- PIR-Melder nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Sendediodenblende außenseitig zumindest im Bereich der seitlichen Öffnung zumindest teilweise strahlungsabsorbierend ist.
- PIR-Melder nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Hauptachsen der Blenden leicht gegeneinander geneigt sind und einen Winkel zwischen 8 und 20° einschließen.
- PIR-Melder nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Sendedioden- und die Detektorblende zueinander spiegelsymmetrisch sind.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19737166A DE19737166C2 (de) | 1997-08-26 | 1997-08-26 | PIR-Melder |
AT98120564T ATE230878T1 (de) | 1997-08-26 | 1998-10-29 | Pir-melder |
ES98120564T ES2190029T3 (es) | 1997-08-26 | 1998-10-29 | Avisador pir. |
EP98120564A EP1014324B1 (de) | 1997-08-26 | 1998-10-29 | PIR-Melder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19737166A DE19737166C2 (de) | 1997-08-26 | 1997-08-26 | PIR-Melder |
EP98120564A EP1014324B1 (de) | 1997-08-26 | 1998-10-29 | PIR-Melder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1014324A1 true EP1014324A1 (de) | 2000-06-28 |
EP1014324B1 EP1014324B1 (de) | 2003-01-08 |
Family
ID=55306378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98120564A Expired - Lifetime EP1014324B1 (de) | 1997-08-26 | 1998-10-29 | PIR-Melder |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1014324B1 (de) |
AT (1) | ATE230878T1 (de) |
DE (1) | DE19737166C2 (de) |
ES (1) | ES2190029T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001228020A (ja) † | 2000-02-18 | 2001-08-24 | Optex Co Ltd | 妨害検知機能付き防犯センサ |
GB2495141B (en) * | 2011-09-30 | 2015-12-09 | 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 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0481934A1 (de) * | 1990-10-19 | 1992-04-22 | ELKRON S.p.A. | Antimaskierungsvorrichtung für Sicherheitssysteme |
EP0556898A1 (de) * | 1992-02-17 | 1993-08-25 | Aritech B.V. | Eindringalarmsystem |
EP0660284A1 (de) * | 1993-12-21 | 1995-06-28 | Optex Co. Ltd. | Infrarotes Eindringlings-Detektierungssystem |
WO1996006865A1 (en) * | 1994-08-28 | 1996-03-07 | Visonic Sicherheitstechnik Gmbh | Infrared intrusion detector with obscuring detecting apparatus |
EP0817148A1 (de) * | 1996-07-04 | 1998-01-07 | Aritech B.V. | Sicherheitssystem mit Lichtleitmedien |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0772171B1 (de) * | 1995-11-03 | 2003-01-08 | Siemens Building Technologies AG | Passiver Infrarot-Einbruchdetektor und dessen Verwendung |
-
1997
- 1997-08-26 DE DE19737166A patent/DE19737166C2/de not_active Expired - Lifetime
-
1998
- 1998-10-29 EP EP98120564A patent/EP1014324B1/de not_active Expired - Lifetime
- 1998-10-29 AT AT98120564T patent/ATE230878T1/de active
- 1998-10-29 ES ES98120564T patent/ES2190029T3/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0481934A1 (de) * | 1990-10-19 | 1992-04-22 | ELKRON S.p.A. | Antimaskierungsvorrichtung für Sicherheitssysteme |
EP0556898A1 (de) * | 1992-02-17 | 1993-08-25 | Aritech B.V. | Eindringalarmsystem |
EP0660284A1 (de) * | 1993-12-21 | 1995-06-28 | Optex Co. Ltd. | Infrarotes Eindringlings-Detektierungssystem |
WO1996006865A1 (en) * | 1994-08-28 | 1996-03-07 | Visonic Sicherheitstechnik Gmbh | Infrared intrusion detector with obscuring detecting apparatus |
EP0817148A1 (de) * | 1996-07-04 | 1998-01-07 | Aritech B.V. | Sicherheitssystem mit Lichtleitmedien |
Also Published As
Publication number | Publication date |
---|---|
ATE230878T1 (de) | 2003-01-15 |
DE19737166A1 (de) | 1999-03-11 |
ES2190029T3 (es) | 2003-07-16 |
DE19737166C2 (de) | 2002-04-25 |
EP1014324B1 (de) | 2003-01-08 |
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