EP1148455A1 - Passive infrared movement detector - Google Patents

Passive infrared movement detector Download PDF

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Publication number
EP1148455A1
EP1148455A1 EP01108254A EP01108254A EP1148455A1 EP 1148455 A1 EP1148455 A1 EP 1148455A1 EP 01108254 A EP01108254 A EP 01108254A EP 01108254 A EP01108254 A EP 01108254A EP 1148455 A1 EP1148455 A1 EP 1148455A1
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EP
European Patent Office
Prior art keywords
detector
passive infrared
mirrors
lenses
motion detector
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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
EP01108254A
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German (de)
French (fr)
Other versions
EP1148455B1 (en
Inventor
Jens-Olaf Lang
Manfred Dr. Zimmerhackl
Volkmar Dr. Norkus
Günter Dr. Hofmann
Rainer Dr. Rosch
Robert Zapp
Lothar Blomberg
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ABB Patent GmbH
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ABB Patent GmbH
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Publication of EP1148455A1 publication Critical patent/EP1148455A1/en
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    • 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
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means

Definitions

  • the invention relates to a passive infrared motion detector with at least a detector / lens arrangement according to the preamble of claim 1.
  • Passive infrared motion detectors are generally known, for example in the specialist book “Passive Infrared Motion Detector", Die section dertechnik 131, publishing house modern industry, Landsberg / Lech, 1996 regarding structure and working methods described.
  • FIG. 1 A basic detector / lens arrangement used in passive infrared motion detectors is shown in Fig. 1.
  • Infrared radiation changes are caused in passive infrared motion detectors usually infrared detectors 3 used, the two sensitive Contain elements 2, and are therefore also referred to as dual sensors.
  • a single lens 1 provides communication with the two sensitive elements 2 of the detector 3 two zones 4 in monitoring room in which movements of people 5 are detected.
  • Passive infrared motion detectors arranged several lenses in front of the detector.
  • the number of realizable zones corresponds to the product of the number of the individual lenses and the number of sensitive elements of the detector.
  • For a detector with a predetermined number of elements results in the maximum number of the zones from the maximum number of lenses in the detector's perspective can be arranged. This maximum number is due to the minimum dimensions of a single lens.
  • the size of a single lens results from the strength of the infrared radiation change, which is to be detected with the passive infrared motion detector.
  • Very sensitive Passive infrared motion detectors therefore have a few, large ones Lenses.
  • Less sensitive passive infrared motion detector for smaller ranges get by with smaller lenses and offer a larger number of lenses a better spatial resolution.
  • the definition of the lens size is therefore always a compromise between achievable sensitivity, determined by the lens size, and the spatial resolution resulting from the number of lenses derives.
  • the invention is therefore based on the object of a passive infrared motion detector specify which is both a high sensitivity and a high has spatial resolution.
  • the invention accordingly proposes a passive infrared motion detector - to increase the number of zones in the monitored area Space - in a detector / lens arrangement additionally between infrared detector and Arrange two mirrors in the field of view of the infrared detector.
  • the mirror are mounted approximately at right angles to each other, so that between the Lines of intersection of the mirror planes of the two mirrors and a perpendicular on the Plane of the sensitive elements of the detector gives an angle that is less than Is 45 °.
  • FIG. 2 shows an arrangement of each on the left and right side of the drawing Infrared detector 3 with two sensitive elements 2, and two mirrors 6. Die both arranged exactly or at least approximately at right angles to each other Mirrors 6 provide two mirror images 7 of the sensitive elements 2 of the infrared detector 3.
  • the two representations of Fig. 2 show that the number of mirror images 7 regardless of the orientation of the elements 2 with respect to the mirrors arise.
  • FIG. 3 shows that a detector / mirror arrangement according to FIG. 2 in connection with only a single converging lens 1 creates six zones 4, i.e. three times as many zones 4, than could be achieved with a detector / lens arrangement without a mirror.
  • a motion detector can be with a usual multitude of converging lenses 1 on a flat or curved surface Area, and thus a motion detector with a high number of zones 4 realize.
  • FIG. 4 shows an arrangement with four identical detector / lens / mirror arrangements according to the invention, which is a motion detector with a detection angle of about 360 °.
  • Each of the four infrared detectors 3 two mirrors 6 assigned.
  • the mirrors 6 mounted at right angles to one another are like this aligned that between the intersection line 8 of the two mirror planes and a vertical 9 on the level of the sensitive elements 2 with reference numerals 10 designated angle of approx. 25 °.
  • the outer shell of the passive infrared motion detector determine the individual lenses 1, which are called Fresnel lenses can be executed and on a curved, from conical and spherical Parts of the composite surface.
  • Fresnel lenses can be executed and on a curved, from conical and spherical Parts of the composite surface.
  • As an alternative to fully reflective Mirrors 6 can also use semi-transparent, partially reflecting mirrors become.
  • the motion detector according to the invention can also have detectors 3 with more each have two sensitive elements 2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Radiation Pyrometers (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

A passive infrared movement detector has one or more detector/lens structures with an infrared detector (3) having two or more sensitive elements (2) and convergent lenses (1) fitted in its angle of view, under which emission of rays can be received. To increase the number of zones (4) in the room under surveillance, two mirrors (6) fit in a detector-lens structure between the infrared detector and the convergent lenses at close right angles to each other.

Description

Die Erfindung bezieht sich auf einen Passiv-Infrarot-Bewegungsmelder mit mindestens einer Detektor/Linsen-Anordnung nach dem Oberbegriff des Anspruchs 1.The invention relates to a passive infrared motion detector with at least a detector / lens arrangement according to the preamble of claim 1.

Passiv-Infrarot-Bewegungsmelder sind allgemein bekannt, und beispielsweise in dem Fachbuch "Passiv-Infrarot-Bewegungsmelder", Die Bibliothek der Technik 131, verlag moderne industrie, Landsberg/Lech, 1996 bezüglich Aufbau und Arbeitsweise beschrieben.Passive infrared motion detectors are generally known, for example in the specialist book "Passive Infrared Motion Detector", Die Bibliothek der Technik 131, publishing house modern industry, Landsberg / Lech, 1996 regarding structure and working methods described.

Eine in Passiv-Infrarot-Bewegungsmeldern benutzte prinzipielle Detektor-/Linsen-Anordnung ist in Fig. 1 dargestellt. Zur Erfassung einer durch Personenbewegungen verursachten Infrarotstrahlungsänderung werden in Passiv-Infrarot-Bewegungsmeldern üblicherweise Infrarotdetektoren 3 eingesetzt, die zwei empfindliche Elemente 2 enthalten, und deshalb auch als Dualsensoren bezeichnet werden. Mit Hilfe von Sammellinsen 1, die als Fresnellinsen ausgebildet sein können, wird Infrarotstrahlung aus einem zu überwachenden Raum auf die empfindlichen Elemente 2 des Detektors 3 abgebildet. Folglich liefert eine einzelne Linse 1 in Verbindung mit den beiden empfindlichen Elementen 2 des Detektors 3 zwei Zonen 4 im zu überwachenden Raum, in denen Bewegungen von Personen 5 erfaßt werden.A basic detector / lens arrangement used in passive infrared motion detectors is shown in Fig. 1. To capture a through movement of people Infrared radiation changes are caused in passive infrared motion detectors usually infrared detectors 3 used, the two sensitive Contain elements 2, and are therefore also referred to as dual sensors. With the help of converging lenses 1, which can be designed as Fresnel lenses Infrared radiation from a room to be monitored on the sensitive elements 2 of the detector 3 shown. Hence, a single lens 1 provides communication with the two sensitive elements 2 of the detector 3 two zones 4 in monitoring room in which movements of people 5 are detected.

Um eine Vielzahl von nutzbaren Zonen zu erhalten, sind in praktisch ausgeführten Passiv-Infrarot-Bewegungsmeldern mehrere Linsen vor dem Detektor angeordnet. Dabei entspricht die Anzahl der realisierbaren Zonen dem Produkt aus der Anzahl der einzelnen Linsen und der Anzahl der empfindlichen Elemente des Detektors. Für einen Detektor mit vorgegebener Elemente-Anzahl resultiert die maximale Anzahl der Zonen aus der maximalen Anzahl der Linsen, die im Blickwinkel des Detektors angeordnet werden können. Diese maximale Anzahl wird durch die minimalen Abmessungen einer einzelnen Linse begrenzt.In order to maintain a variety of usable zones, there are practical ones Passive infrared motion detectors arranged several lenses in front of the detector. The number of realizable zones corresponds to the product of the number of the individual lenses and the number of sensitive elements of the detector. For a detector with a predetermined number of elements results in the maximum number of the zones from the maximum number of lenses in the detector's perspective can be arranged. This maximum number is due to the minimum dimensions of a single lens.

Die Größe einer einzelnen Linse ergibt sich aus der Stärke der Infrarotstrahlungsänderung, die mit dem Passiv-Infrarot-Bewegungsmelder erfaßt werden soll. Sehr empfindliche Passiv-Infrarot-Bewegungsmelder verfügen deshalb über wenige, große Linsen. Unempfindlichere Passiv-Infrarot-Bewegungsmelder für kleinere Reichweiten kommen dagegen mit kleineren Linsen aus und bieten durch eine größere Anzahl von Linsen eine bessere räumliche Auflösung. Die Festlegung der Linsengröße ist daher immer ein Kompromiß zwischen erzielbarer Empfindlichkeit, bestimmt durch die Linsengröße, und der räumlichen Auflösung, die sich aus der Anzahl der Linsen ableitet.The size of a single lens results from the strength of the infrared radiation change, which is to be detected with the passive infrared motion detector. Very sensitive Passive infrared motion detectors therefore have a few, large ones Lenses. Less sensitive passive infrared motion detector for smaller ranges , on the other hand, get by with smaller lenses and offer a larger number of lenses a better spatial resolution. The definition of the lens size is therefore always a compromise between achievable sensitivity, determined by the lens size, and the spatial resolution resulting from the number of lenses derives.

Mit herkömmlichen Anordnungen aus Detektoren und Linsen lassen sich deshalb keine Passiv-Infrarot-Bewegungsmelder konstruieren, die zugleich eine hohe Empfindlichkeit und eine hohe räumliche Auflösung ermöglichen.With conventional arrangements of detectors and lenses, do not construct a passive infrared motion detector that is also highly sensitive and enable a high spatial resolution.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Passiv-Infrarot-Bewegungsmelder anzugeben, der zugleich eine hohe Empfindlichkeit und ein hohes räumliches Auflösungsvermögen hat.The invention is therefore based on the object of a passive infrared motion detector specify which is both a high sensitivity and a high has spatial resolution.

Diese Aufgabe wird durch einen Passiv-Infrarot-Bewegungsmelder gelöst, der die im Anspruch 1 angegebenen Merkmale aufweist. Vorteilhafte Ausgestaltungen sind in weiteren Ansprüchen angegeben.This task is solved by a passive infrared motion detector which Features specified claim 1. Advantageous configurations are shown in specified further claims.

Mit der Erfindung wird demnach vorgeschlagen, in einem Passiv-Infrarot-Bewegungsmelder - zur Erhöhung der Anzahl von Zonen im zu überwachenden Raum - in einer Detektor/Linsen-Anordnung zusätzlich zwischen Infrarotdetektor und Sammellinsen zwei Spiegel im Blickfeld des Infrarotdetektors anzuordnen. Die Spiegel sind zueinander annähernd im rechten Winkel montiert, so daß sich zwischen der Schnittgeraden der Spiegelebenen der beiden Spiegel und einer Senkrechten auf der Ebene der empfindlichen Elemente des Detektors ein Winkel ergibt, der kleiner als 45° ist.The invention accordingly proposes a passive infrared motion detector - to increase the number of zones in the monitored area Space - in a detector / lens arrangement additionally between infrared detector and Arrange two mirrors in the field of view of the infrared detector. The mirror are mounted approximately at right angles to each other, so that between the Lines of intersection of the mirror planes of the two mirrors and a perpendicular on the Plane of the sensitive elements of the detector gives an angle that is less than Is 45 °.

Eine Anordnung von Spiegeln in einem Bewegungsmelder ist an sich bekannt und beispielsweise im o.g. Fachbuch beschrieben. Eine solche, für eine Erweiterung des Erfassungsbereichs bekannte Spiegelanordnung ist nicht mit der hier zu einem anderen Zweck und in anderer Anordnung vorgeschlagenen Spiegelverwendung zu verwechseln.An arrangement of mirrors in a motion detector is known per se and for example in the above Technical book described. Such, for an expansion of the Detection range known mirror arrangement is not the same with another here Purpose and mirror arrangement proposed in another arrangement confound.

Eine weitere Beschreibung der Erfindung erfolgt nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels.A further description of the invention is given below with the aid of a Drawing shown embodiment.

Es zeigt:

Fig. 1
eine bekannte prinzipielle Detektor/Linsen-Anordnung,
Fig. 2
eine erfindungsgemäße Detektor/Spiegel-Anordnung,
Fig. 3
eine erfindungsgemäße Detektor/Spiegel-Anordnung in Verbindung mit einer Linse, zur Darstellung einer erzielten Zonen-Vervielfältigung, und
Fig. 4
eine Darstellung einer vierfachen Detektor/Linsen/Spiegel-Anordnung.
It shows:
Fig. 1
a known basic detector / lens arrangement,
Fig. 2
a detector / mirror arrangement according to the invention,
Fig. 3
a detector / mirror arrangement according to the invention in connection with a lens, for displaying a zone duplication achieved, and
Fig. 4
a representation of a fourfold detector / lens / mirror arrangement.

Die Fig. 2 und Fig. 3 verdeutlichen das erfindungsgemäß genutzte Prinzip. Dabei zeigt Fig. 2 auf der linken und rechten Zeichnungsseite jeweils eine Anordnung eines Infrarotdetektors 3 mit zwei empfindlichen Elementen 2, und zwei Spiegeln 6. Die beiden genau oder wenigstens annähernd im rechten Winkel zueinander angeordneten Spiegel 6 liefern zwei Spiegelbilder 7 der empfindlichen Elemente 2 des Infrarotdetektors 3. Die beiden Darstellungen der Fig. 2 zeigen, daß die Anzahl der Spiegelbilder 7 unabhängig von der Ausrichtung der Elemente 2 gegenüber den Spiegeln entstehen.2 and 3 illustrate the principle used according to the invention. there Fig. 2 shows an arrangement of each on the left and right side of the drawing Infrared detector 3 with two sensitive elements 2, and two mirrors 6. Die both arranged exactly or at least approximately at right angles to each other Mirrors 6 provide two mirror images 7 of the sensitive elements 2 of the infrared detector 3. The two representations of Fig. 2 show that the number of mirror images 7 regardless of the orientation of the elements 2 with respect to the mirrors arise.

Fig. 3 zeigt, daß eine Detektor/Spiegelanordnung gemäß Fig. 2 in Verbindung mit nur einer einzigen Sammellinse 1 sechs Zonen 4 erzeugt, also dreimal so viele Zonen 4, als mit einer Detektor/Linsen-Anordnung ohne Spiegel erreichbar wäre.FIG. 3 shows that a detector / mirror arrangement according to FIG. 2 in connection with only a single converging lens 1 creates six zones 4, i.e. three times as many zones 4, than could be achieved with a detector / lens arrangement without a mirror.

Unter Anwendung des in Fig. 3 gezeigten Prinzips läßt sich ein Bewegungsmelder mit einer üblichen Vielzahl von Sammellinsen 1 auf einer ebenen oder beliebig gekrümmten Fläche, und damit ein Bewegungsmelder mit einer hohen Zahl von Zonen 4 realisieren.Using the principle shown in Fig. 3, a motion detector can be with a usual multitude of converging lenses 1 on a flat or curved surface Area, and thus a motion detector with a high number of zones 4 realize.

Fig. 4 zeigt eine Anordnung mit vier identischen erfindungsgemäßen Detektor/Linsen/Spiegel-Anordnungen, die einen Bewegungsmelder mit einem Erfassungswinkel von etwa 360° bilden. Dabei sind jedem der vier Infrarotdetektoren 3 zwei Spiegel 6 zugeordnet. Die rechtwinklig zueinander montierten Spiegel 6 sind so ausgerichtet, daß sich zwischen der Schnittgeraden 8 der beiden Spiegelebenen und einer Senkrechten 9 auf der Ebene der empfindlichen Elemente 2 ein mit Bezugszeichen 10 bezeichneter Winkel von ca. 25° einstellt. Die äußere Hülle des Passiv-Infrarot-Bewegungsmelders bestimmen die einzelnen Linsen 1, die als Fresnellinsen ausgeführt sein können und auf einer gekrümmten, aus konischen und sphärischen Teilen zusammengesetzten Fläche liegen. Alternativ zu vollständig reflektierenden Spiegeln 6 können auch halbdurchlässige, teilweise reflektierende Spiegel eingesetzt werden.4 shows an arrangement with four identical detector / lens / mirror arrangements according to the invention, which is a motion detector with a detection angle of about 360 °. Each of the four infrared detectors 3 two mirrors 6 assigned. The mirrors 6 mounted at right angles to one another are like this aligned that between the intersection line 8 of the two mirror planes and a vertical 9 on the level of the sensitive elements 2 with reference numerals 10 designated angle of approx. 25 °. The outer shell of the passive infrared motion detector determine the individual lenses 1, which are called Fresnel lenses can be executed and on a curved, from conical and spherical Parts of the composite surface. As an alternative to fully reflective Mirrors 6 can also use semi-transparent, partially reflecting mirrors become.

Der erfindungsgemäße Bewegungsmelder kann auch Detektoren 3 mit jeweils mehr als zwei empfindlichen Elementen 2 aufweisen.The motion detector according to the invention can also have detectors 3 with more each have two sensitive elements 2.

Claims (5)

Passiv-Infrarot-Bewegungsmelder mit mindestens einer Detektor/Linsen-Anordnung, die einen Infrarotdetektor (3), der mindestens zwei empfindliche Elemente (2) aufweist, und in dessen Blickwinkel, unter dem Strahlung empfangen werden kann, montierte Sammellinsen (1) enthält, dadurch gekennzeichnet, daß - zur Erhöhung der Anzahl von Zonen (4) im zu überwachenden Raum - in der Detektor/Linsen-Anordnung jeweils zwischen Infrarotdetektor (3) und Sammellinsen (1) zwei Spiegel (6) im Blickfeld des Infrarotdetektor (6) angeordnet sind, die zueinander etwa im rechten Winkel montiert sind, so daß sich zwischen der Schnittgeraden (8) der Spiegelebenen der beiden Spiegel (6) und einer Senkrechten (9) auf der Ebene der empfindlichen Elemente (2) ein Winkel (10) ergibt, der kleiner als 45° ist.Passive infrared motion detector with at least one detector / lens arrangement, which contains an infrared detector (3), which has at least two sensitive elements (2), and in the viewing angle from which radiation can be received, mounted converging lenses (1), characterized in that - to increase the number of zones (4) in the room to be monitored - two mirrors (6) are arranged in the detector / lens arrangement between the infrared detector (3) and converging lenses (1) in the field of view of the infrared detector (6) are mounted approximately at right angles to each other so that there is an angle (10) between the line of intersection (8) of the mirror planes of the two mirrors (6) and a perpendicular (9) on the level of the sensitive elements (2), which is less than 45 °. Passiv-Infrarot-Bewegungsmelder nach Anspruch 1, dadurch gekennzeichnet, daß die einzelnen Linsen der Sammellinsen (1) auf einer ebenen oder beliebig gekrümmten Fläche angeordnet sind.Passive infrared motion detector according to claim 1, characterized in that the individual lenses of the converging lenses (1) are arranged on a flat or any surface. Passiv-Infrarot-Bewegungsmelder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die einzelnen Linsen der Sammellinsen (1) als beliebig geformte Ausschnitte aus Fresnellinsen ausgeführt sind.Passive infrared motion detector according to claim 1 or 2, characterized in that the individual lenses of the converging lenses (1) are designed as cutouts of Fresnel lenses of any shape. Passiv-Infrarot-Bewegungsmelder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Spiegel (6) als halbdurchlässige, teilweise reflektierende Spiegel ausgeführt sind.Passive infrared motion detector according to one of the preceding claims, characterized in that the two mirrors (6) are designed as semi-transparent, partially reflecting mirrors. Passiv-Infrarot-Bewegungsmelder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß vier identische Detektor/Linsen-Anordnungen mit jeweils zwei Spiegeln (6) vorhanden sind.Passive infrared motion detector according to one of the preceding claims, characterized in that there are four identical detector / lens arrangements, each with two mirrors (6).
EP01108254A 2000-04-22 2001-03-31 Passive infrared movement detector Expired - Lifetime EP1148455B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10019999A DE10019999A1 (en) 2000-04-22 2000-04-22 Passive infrared movement detector for increasing the number of zones in a room under surveillance has detector/lens structures with an infrared detector having sensitive elements and convergent lenses
DE10019999 2000-04-22

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EP1148455A1 true EP1148455A1 (en) 2001-10-24
EP1148455B1 EP1148455B1 (en) 2003-02-19

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Cited By (1)

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WO2015128114A1 (en) * 2014-02-28 2015-09-03 Abb Ag Infrared motion detector

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DE102006016395B3 (en) * 2006-04-07 2007-07-19 Abb Patent Gmbh Detector/lens arrangement for use in infrared motion detector, has dual-infrared sensor with two sensor units, where one sensor unit is charged with infrared radiation by extreme edge-sided lens and mirror
JP6681594B2 (en) * 2016-11-30 2020-04-15 パナソニックＩｐマネジメント株式会社 Infrared detector

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015128114A1 (en) * 2014-02-28 2015-09-03 Abb Ag Infrared motion detector
CN106461456A (en) * 2014-02-28 2017-02-22 Abb股份公司 Infrared motion detector
AU2015222487B2 (en) * 2014-02-28 2017-12-07 Abb Schweiz Ag Infrared motion detector
CN106461456B (en) * 2014-02-28 2019-01-22 Abb股份公司 infrared motion detector

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ATE233007T1 (en) 2003-03-15
DE50100106D1 (en) 2003-03-27
DE10019999A1 (en) 2001-10-25
EP1148455B1 (en) 2003-02-19

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