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EP0616307A1 - Intrusion detector - Google Patents

Intrusion detector Download PDF

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Publication number
EP0616307A1
EP0616307A1 EP94103566A EP94103566A EP0616307A1 EP 0616307 A1 EP0616307 A1 EP 0616307A1 EP 94103566 A EP94103566 A EP 94103566A EP 94103566 A EP94103566 A EP 94103566A EP 0616307 A1 EP0616307 A1 EP 0616307A1
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EP
European Patent Office
Prior art keywords
locking device
housing
light source
opening
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94103566A
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German (de)
French (fr)
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EP0616307B1 (en
Inventor
René Lange
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cerberus AG
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Cerberus AG
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Publication date
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Publication of EP0616307A1 publication Critical patent/EP0616307A1/en
Application granted granted Critical
Publication of EP0616307B1 publication Critical patent/EP0616307B1/en
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    • 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

Definitions

  • the invention relates to an intrusion detector according to the preamble of claim 1.
  • intrusion detectors are already available on the market in various designs. They are used to detect movements of intruded objects or people within a specific room. These are mainly two types of detectors, the so-called passive infrared detectors and the ultrasonic detectors. Combinations of these two detection principles are also used.
  • the detectors are part of a system which, in addition to the detectors, also consists of a signal reception center and acoustic warning devices.
  • the detectors are connected to a control center via a network.
  • These intrusion detectors generally consist of a two-part housing, which encloses a motion sensor, such as an infrared sensor or an ultrasonic sensor, and an evaluation circuit.
  • the housing also has an entry window through which the infrared rays or the ultrasound waves can reach the sensor inside the housing.
  • the two-part housing consists of a base and a cover part, which are usually connected to each other by a screw on the side of the housing or by a snap lock.
  • One of the main problems when using such detectors is to prevent sabotage. This means every attempt to put a detector or its connection to the control center out of operation by direct or indirect intervention or manipulation. To prevent such sabotage, some detectors also have a switch that triggers a signal when the cover part is separated from the base part. This signal is reproduced by the evaluation circuit, for example, as a malfunction to the control center or as an acoustic warning signal. Other detectors, as described in U.S. Patent 4,451,733, are equipped with a lid switch. These switches are arranged with respect to the two housing parts so that when the cover part is lifted from the base part up to a certain height, the switch is actuated and a signal is sent to the evaluation circuit. These switches are used to make unauthorized opening of the housing and possibly sabotaging the detector more difficult.
  • a disadvantage of such circuit breakers is that it is still possible to sabotage the detector without actuating the switch. This can be done by partially loosening the screws or lifting off the cover, so that a narrower Air gap between the two housing parts occurs without the switch responding.
  • the narrow gap allows substances such as foam or paint to be introduced into the interior of the detector, so that the sensor or the entry window of the detector is covered and the detector is made insensitive.
  • a method for preventing sabotage of a passive infrared detector by covering the sensor or the entrance window is described in EP 0.189.536.
  • a radiation source is attached to the housing cover, with which the permeability of the entrance window and the radiation path to the sensor is monitored.
  • the housing cover contains a locking device which firmly connects the cover part to the base part, a fixed locking being clearly visible by a light indicator on an opening in the locking device.
  • An opening is provided in the locking device, which moves when the lock is actuated.
  • the locking device preferably consists of a rotatable screw cap.
  • the housing can be closed, for example, by turning the screw cap 90 ° and the opening can be moved over the light source.
  • a Sliding lock are used, which also brings the opening over the light source as soon as the two housing parts are firmly connected.
  • the screw cap can be provided with a security screw, the solution of which is only possible with the appropriate special tool.
  • the light source can be arranged directly under the housing cover. In a further embodiment, however, it can also be countersunk perpendicular to the housing cover or arranged laterally.
  • a light guide or optical components such as mirrors, prisms or lenses can be used to guide the light to the opening.
  • the locking device can be connected to a switching element which is actuated in the event of an illegal opening of the locking device and sends a fault signal to the control center.
  • the housing parts are not yet separated from each other, so that there is no gap between them through which the inside of the detector could be changed. This means that when the attempt is made to open the detector, the fault is reported both to the control center and by the light source before sabotage can take place.
  • the housing 1 of the intrusion detector consists of a cover 2 and a base 3.
  • a screw cap 4 on the front of the cover 2, which locks the cover 2 to the base 3.
  • An opening 5 is arranged in the screw cap 4, which moves with the screw cap when it is actuated.
  • the screw cap 4 is brought into the "open” or “closed” position with a Phillips screwdriver by a 90 ° rotation, the lid not being locked to the floor in the “open” position or in the “closed” position of the Lid is locked to the bottom.
  • a light source 6 is arranged on a printed circuit board 7 so that it lies under the opening 5 in the screw cap 4 when it is in the "closed” position. In this "closed” position, the light from the light source 6 passes through the opening 5 to the outside. If the screw cap 4 is in the "open” position, the opening 5 is not located above the light source 6, so that no light reaches the outside.
  • FIG. 3 there is a slide closure 8.
  • the slide closure 8 is, for example, brought into the “open” or “closed” position by pushing with a pin.
  • the sliding closure 8 also contains an opening 5 which moves with the sliding closure 8 when it is actuated.
  • a light source 6 is arranged under the cover 2 on a printed circuit board 7 such that it lies under the opening 5 in the slide closure 8 when it is in the “closed” position.
  • a light guide 9 is arranged in the screw cap 4 in such a way that it ends in the opening 5.
  • the end of the light guide 9 is designed in the form of a lens or a cone. The bundling means that the light is still visible to the eye from a greater distance.
  • a switching element 10 is attached in such a way that it sends a signal to the control center as soon as the screw cap 4 has been brought into the “open” position.
  • the signal is reported as a fault or alarm at the control center.
  • the individual intrusion detectors can be checked for the correct locking of their housings by a simple visual inspection of the illuminated opening on the locking device from a distance.
  • the control can also be carried out from the control center by checking the state of the switching element 10.
  • an intrusion detector has been sabotaged by opening, sabotaging and reclosing the housing, this can be detected by the control panel being equipped with a memory function. This stores the interference signal, which was triggered by actuation of the switching element 10, and triggers an error message when the system is armed.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

An intrusion detector consisting of a housing (1), a movement sensor and an evaluation circuit, whose housing lid (2) contains a locking device (4) with an opening (5). When the locking device (4) is operated, the housing lid (2) is firmly connected to or released from the housing base (3). The opening (5) is moved in such a manner, when the locking device (4) is closed, that it comes to rest over a light source (6) which is located under the housing lid (2). The light of the light source (6) enters through the opening (5) and indicates that the housing lid (2) is correctly locked to the base (3). An expanded design serves for anti-sabotage purposes in that it contains a switching element (10) which emits a disturbance signal as soon as the firm connection of the housing lid (2) with the base (3) has been released. <IMAGE>

Description

Die Erfindung betrifft einen Intrusionsmelder gemäss dem Oberbegriff des Patentanspruch 1.The invention relates to an intrusion detector according to the preamble of claim 1.

Solche Intrusionsmelder sind schon in verschiedenen Ausführungen auf dem Markt erhältlich. Sie dienen zur Erkennung von Bewegungen von eingedrungenen Objekten oder Personen innerhalb eines bestimmten Raumes. Es handelt sich dabei hauptsächlich um zwei Arten von Meldern, den sogenannten Passiv-Infrarotmeldern und den Ultraschallmeldern. Es werden auch Kombinationen dieser beiden Detektionsprinzipien verwendet. Die Melder sind Teil eines Systems, welches neben den Meldern noch aus einer Signalempfangszentrale und akustischen Warngeräten besteht. Die Melder sind über ein Leitungsnetz mit einer Zentrale verbunden. Diese Intrusionsmelder bestehen im allgemeinen aus einem zweiteiligen Gehäuse, welches einen Bewegungssensor, wie zum Beispiel einen Infrarotsensor oder einen Ultraschallsensor, und eine Auswerteschaltung umschliesst. Das Gehäuse weist ausserdem ein Eintrittsfenster auf, durch welches die Infrarotstrahlen bzw. die Ultraschallwellen zum Sensor im Gehäuseinnern gelangen können. Das zweiteilige Gehäuse besteht aus einem Boden- und einem Deckelteil, welche üblicherweise durch eine Schraube an der Seite des Gehäuses oder durch einen Schnappverschluss miteinander verbunden werden.Such intrusion detectors are already available on the market in various designs. They are used to detect movements of intruded objects or people within a specific room. These are mainly two types of detectors, the so-called passive infrared detectors and the ultrasonic detectors. Combinations of these two detection principles are also used. The detectors are part of a system which, in addition to the detectors, also consists of a signal reception center and acoustic warning devices. The detectors are connected to a control center via a network. These intrusion detectors generally consist of a two-part housing, which encloses a motion sensor, such as an infrared sensor or an ultrasonic sensor, and an evaluation circuit. The housing also has an entry window through which the infrared rays or the ultrasound waves can reach the sensor inside the housing. The two-part housing consists of a base and a cover part, which are usually connected to each other by a screw on the side of the housing or by a snap lock.

Eines der Hauptprobleme bei der Anwendung solcher Melder besteht darin eine Sabotage zu verhindern. Hierunter versteht man jeden Versuch einen Melder oder seine Verbindung mit der Zentrale durch direkte oder indirekte Eingriffe oder Manipulationen ausser Betrieb zu setzen. Um eine solche Sabotage zu verhindern, weisen manche Melder zusätzlich einen Schalter auf, welcher ein Signal auslöst, wenn der Deckelteil vom Bodenteil getrennt wird. Dieses Signal wird durch die Auswerteschaltung zum Beispiels als Störung an die Zentrale oder akustisches Warnsignal wiedergegeben. Andere Melder, wie in US-Patent 4,451,733 beschrieben, sind mit einem Deckelschalter ausgestattet. Diese Schalter sind bezüglich den beiden Gehäuseteilen so angeordnet, dass beim Abheben des Deckelteils vom Bodenteil bis zu einer bestimmten Höhe der Schalter betätigt wird und ein Signal an die Auswerteschaltung abgegeben wird. Diese Schalter dienen somit dazu, ein unbefugtes Oeffnen des Gehäuses und allenfalls das Sabotieren des Melders zu erschweren.One of the main problems when using such detectors is to prevent sabotage. This means every attempt to put a detector or its connection to the control center out of operation by direct or indirect intervention or manipulation. To prevent such sabotage, some detectors also have a switch that triggers a signal when the cover part is separated from the base part. This signal is reproduced by the evaluation circuit, for example, as a malfunction to the control center or as an acoustic warning signal. Other detectors, as described in U.S. Patent 4,451,733, are equipped with a lid switch. These switches are arranged with respect to the two housing parts so that when the cover part is lifted from the base part up to a certain height, the switch is actuated and a signal is sent to the evaluation circuit. These switches are used to make unauthorized opening of the housing and possibly sabotaging the detector more difficult.

Ein Nachteil solcher Schutzschalter besteht darin, dass es dennoch möglich ist, den Melder zu sabotieren, ohne dass der Schalter betätigt wird. Dies kann durch teilweises Lösen der Schrauben bzw. Abhebens des Deckels erfolgen, so dass ein schmaler Luftspalt zwischen den beiden Gehäuseteilen entsteht, ohne dass der Schalter anspricht. Durch den schmalen Spalt können Substanzen, wie zum Beispiel Schaum oder Farbe, in das Melderinnere eingeführt werden, so dass der Sensor oder das Eintrittsfenster des Melders verdeckt wird und so der Melder unempfindlich gemacht wird.A disadvantage of such circuit breakers is that it is still possible to sabotage the detector without actuating the switch. This can be done by partially loosening the screws or lifting off the cover, so that a narrower Air gap between the two housing parts occurs without the switch responding. The narrow gap allows substances such as foam or paint to be introduced into the interior of the detector, so that the sensor or the entry window of the detector is covered and the detector is made insensitive.

Eine Methode, eine Sabotage eines Passiv-Infrarotmelders durch Abdeckung des Sensors oder des Eintrittsfensters zu verhindern, ist in EP 0,189,536 beschrieben. Hier ist eine Strahlungsquelle am Gehäusedeckel befestigt, mit welcher die Durchlässigkeit des Eintrittsfensters sowie des Strahlungspfads bis zum Sensor überwacht wird.A method for preventing sabotage of a passive infrared detector by covering the sensor or the entrance window is described in EP 0.189.536. Here, a radiation source is attached to the housing cover, with which the permeability of the entrance window and the radiation path to the sensor is monitored.

Ein wichtiger Bestandteil der Massnahmen, welche eine Sabotage verhindern können, ist die korrekte Installierung der Melder. Es kommt wiederholt vor, dass ein Melder nicht korrekt verschlossen wird und deshalb die Sabotageschutzvorrichtung nicht einwandfrei funktioniert. Jedoch ist eine korrekte Verschliessung des Meldergehäuses abhängig von der Sorgfalt des Installationspersonals. Diese kann an den gegenwärtig auf dem Markt erhältlichen Meldern nur durch einen Test von der Zentrale aus oder visuell aus der Nähe kontrolliert werden. Ein solcher visueller Test aus der Nähe kann jedoch beschwerlich oder sogar unmöglich sein, wenn der Melder an einem schwer erreichbaren oder erhöhten Ort montiert ist. Die Erfindung setzt sich die Aufgabe, die genannten Nachteile der bekannten Intrusionsmelder zur Verhinderung der Sabotage zu verringern, insbesondere die Kontrolle der korrekten Verschliessung der Melder zu erleichtern und Sabotageversuche zu erschweren.An important part of the measures that can prevent sabotage is the correct installation of the detectors. It happens repeatedly that a detector is not closed correctly and therefore the tamper protection device does not function properly. However, correct closing of the detector housing depends on the care of the installation personnel. This can only be checked on the detectors currently available on the market by performing a test from the control center or visually at close range. However, such a close-up visual test can be difficult or even impossible if the detector is installed in a difficult to reach or elevated location. The invention sets itself the task of reducing the disadvantages of the known intrusion detectors to prevent sabotage, in particular to facilitate the control of the correct closure of the detectors and to make sabotage attempts more difficult.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass der Gehäusedeckel eine Verriegelungsvorrichtung enthält, welche den Deckelteil fest mit dem Bodenteil verbindet, wobei eine feste Verriegelung durch eine Lichtanzeige an einer Oeffnung in der Verriegelungsvorrichtung klar sichtbar ist.According to the invention, this object is achieved in that the housing cover contains a locking device which firmly connects the cover part to the base part, a fixed locking being clearly visible by a light indicator on an opening in the locking device.

In der Verriegelungsvorrichtung ist eine Oeffnung angebracht, welche bei Betätigung der Verriegelung sich bewegt. Unter dem Gehäusedeckel befindet sich eine Lichtquelle. Werden der Gehäusedeckel und der Gehäuseboden durch Betätigung der Verriegelungsvorrichtung miteinander fest verbunden, wird zugleich die Oeffnung über die Lichtquelle gebracht. Das von ihr ausgehende Licht gelangt durch die Oeffnung nach aussen und ist auch aus einer Distanz für das Auge sichtbar. Sind die beiden Gehäuseteile nicht miteinander fest verbunden so befindet sich die Oeffnung nicht über der Lichtquelle. In diesem Fall ist von aussen kein Licht sichtbar.An opening is provided in the locking device, which moves when the lock is actuated. There is a light source under the cover. If the housing cover and the housing base are firmly connected to one another by actuating the locking device, the opening is simultaneously brought over the light source. The light emanating from it passes through the opening and is also visible to the eye from a distance. If the two housing parts are not firmly connected to one another, the opening is not located above the light source. In this case, no light is visible from the outside.

Vorzugsweise besteht die Verriegelungsvorrichtung aus einem drehbaren Schraubverschluss. Dadurch kann das Gehäuse beispielsweise durch eine 90°-Drehung des Schraubverschlusses geschlossen werden und die Oeffnung über die Lichtquelle bewegt werden. Anstelle eines Drehverschlusses kann auch ein Schiebeverschluss eingesetzt werden, welcher ebenfalls die Oeffnung über die Lichtquelle bringt, sobald die beiden Gehäuseteile miteinander fest verbunden sind.The locking device preferably consists of a rotatable screw cap. As a result, the housing can be closed, for example, by turning the screw cap 90 ° and the opening can be moved over the light source. Instead of a twist lock, a Sliding lock are used, which also brings the opening over the light source as soon as the two housing parts are firmly connected.

Soll weiter verhindert werden, dass nach korrekter Verriegelung des Gehäuses durch den Fachmann dieses durch Laien geöffnet wird, kann der Schraubverschluss mit einer Sicherheitsschraube versehen werden, dessen Lösung nur durch entsprechendes Spezialwerkzeug möglich ist. Die Lichtquelle kann unmittelbar unter dem Gehäusedeckel angeordnet sein. Sie kann jedoch in einer weiteren Ausführungsform auch senkrecht zum Gehäusedeckel versenkt sein oder seitlich angeordnet sein. Um das Licht zur Oeffnung zu führen, können ein Lichtleiter oder optische Bauteile wie Spiegel, Prismen oder Linsen eingesetzt werden.If it is to be further prevented that the housing is opened by a specialist after the housing has been correctly locked, the screw cap can be provided with a security screw, the solution of which is only possible with the appropriate special tool. The light source can be arranged directly under the housing cover. In a further embodiment, however, it can also be countersunk perpendicular to the housing cover or arranged laterally. A light guide or optical components such as mirrors, prisms or lenses can be used to guide the light to the opening.

Um eine Sabotage des Melders durch Oeffnen des Melders und Verändern des Inneren des Melders weiter zu erschweren, kann die Verriegelungsvorrichtung mit einem Schaltelement verbunden werden, welches im Fall einer unrechtmässigen Oeffnung der Verriegelung betätigt wird und ein Störsignal an die Zentrale leitet. Zu diesem Zeitpunkt sind die Gehäuseteile noch nicht voneinander getrennt, so dass kein Spalt zwischen ihnen besteht, durch welchen das Innere des Melders verändert werden könnte. Somit wird die Störung schon beim Versuch den Melder zu öffnen sowohl bei der Zentrale als auch durch die Lichtquelle gemeldet bevor eine Sabotage stattfinden konnte.In order to further complicate sabotage of the detector by opening the detector and changing the inside of the detector, the locking device can be connected to a switching element which is actuated in the event of an illegal opening of the locking device and sends a fault signal to the control center. At this time, the housing parts are not yet separated from each other, so that there is no gap between them through which the inside of the detector could be changed. This means that when the attempt is made to open the detector, the fault is reported both to the control center and by the light source before sabotage can take place.

Die Erfindung wird anhand der in den Figuren 1 bis 4 wiedergegebenen Ausführungsbeispiele näher erläutert:

  • Figur 1 zeigt einen Längsschnitt durch einen Passiv-Infrarotmelder gemäss vorliegender Erfindung, bei dem die Verriegelungsvorrichtung drehbar ist.
  • Figur 2 zeigt die Vorderansicht eines Passiv-Infrarotmelders gemäss Figur 1.
  • Figur 3 zeigt einen Längsschnitt durch eine andere Ausführungsform eines Passiv-Infrarotmelders, bei dem die Verriegelungsvorrichtung schiebbar ist.
  • Figur 4 zeigt einen Längsschnitt durch eine weitere Ausführung eines Passiv-Infrarotmelders, bei dem die Verriegelungsvorrichtung einen Lichtleiter enthält.
The invention is explained in more detail using the exemplary embodiments shown in FIGS. 1 to 4:
  • Figure 1 shows a longitudinal section through a passive infrared detector according to the present invention, in which the locking device is rotatable.
  • FIG. 2 shows the front view of a passive infrared detector according to FIG. 1.
  • Figure 3 shows a longitudinal section through another embodiment of a passive infrared detector, in which the locking device can be pushed.
  • Figure 4 shows a longitudinal section through a further embodiment of a passive infrared detector, in which the locking device contains an optical fiber.

Das Gehäuse 1 des Intrusionsmelders besteht aus einem Deckel 2 und einem Boden 3. Auf der Vorderseite des Deckels 2 befindet sich ein Schraubverschluss 4, welche den Deckel 2 mit dem Boden 3 verriegelt. Im Schraubverschluss 4 ist eine Oeffnung 5 angeordnet, welche sich mit dem Schraubverschluss bewegt, wenn dieser betätigt wird.The housing 1 of the intrusion detector consists of a cover 2 and a base 3. There is a screw cap 4 on the front of the cover 2, which locks the cover 2 to the base 3. An opening 5 is arranged in the screw cap 4, which moves with the screw cap when it is actuated.

Der Schraubverschluss 4 wird mit einem Kreuzschlitzschraubendreher durch eine 90°-Drehung in die "offene" bzw. "geschlossene" Position gebracht, wobei in der "offenen" Position der Deckel nicht mit dem Boden verriegelt ist bzw. in der "geschlossenen" Position der Deckel mit dem Boden verriegelt ist. Unter dem Deckel 2 ist eine Lichtquelle 6 auf einer Leiterplatte 7 so angeordnet, dass sie unter der Oeffnung 5 im Schraubverschluss 4 liegt, wenn dieser in der "geschlossenen" Position ist. In dieser "geschlossenen" Position gelangt das Licht von der Lichtquelle 6 durch die Oeffnung 5 nach aussen. Ist der Schraubverschluss 4 in der "offenen'' Position befindet sich die Oeffnung 5 nicht über der Lichtquelle 6, sodass kein Licht nach aussen gelangt.The screw cap 4 is brought into the "open" or "closed" position with a Phillips screwdriver by a 90 ° rotation, the lid not being locked to the floor in the "open" position or in the "closed" position of the Lid is locked to the bottom. Under the cover 2, a light source 6 is arranged on a printed circuit board 7 so that it lies under the opening 5 in the screw cap 4 when it is in the "closed" position. In this "closed" position, the light from the light source 6 passes through the opening 5 to the outside. If the screw cap 4 is in the "open" position, the opening 5 is not located above the light source 6, so that no light reaches the outside.

In einer anderen Ausführung, in Figur 3 dargestellt, befindet sich ein Schiebeverschluss 8. Der Schiebeverschluss 8 wird zum Beispiel mit einem Stift durch Schieben in die "offene" bzw. "geschlossene" Position gebracht. Der Schiebeverschluss 8 enthält ebenfalls eine Oeffnung 5, welche sich mit dem Schiebeverschluss 8 bewegt, wenn dieser betätigt wird. Eine Lichtquelle 6 ist unter dem Deckel 2 auf einer Leiterplatte 7 so angeordnet, dass sie unter der Oeffnung 5 im Schiebeverschluss 8 liegt, wenn dieser sich in der "geschlossenen" Position befindet.In another embodiment, shown in FIG. 3, there is a slide closure 8. The slide closure 8 is, for example, brought into the “open” or “closed” position by pushing with a pin. The sliding closure 8 also contains an opening 5 which moves with the sliding closure 8 when it is actuated. A light source 6 is arranged under the cover 2 on a printed circuit board 7 such that it lies under the opening 5 in the slide closure 8 when it is in the “closed” position.

Sollte es aus Kontruktions- oder Platzgründen ungünstig sein, die Lichtquelle 6 unmittelbar unter dem Deckel 2 anzubringen, darf sie auch tiefer senkrecht oder auch seitlich unter dem Deckel angeordnet sein, wie in Figur 4 dargestellt. Um das Licht von der Lichtquelle 6 zur Oeffnung 5 zu führen, ist ein Lichtleiter 9 im Schraubverschluss 4 so angeordnet, dass dieser in der Oeffnung 5 endet. Zwecks Bündelung des Lichts, welches aus dem Lichtleiter 9 durch die Oeffnung 5 austritt, ist das Ende des Lichtleiters 9 linsenförmig oder kegelförmig ausgebildet. Die Bündelung bewirkt, dass das Licht aus noch grösserer Distanz mit dem Auge noch sichtbar ist.Should it be unfavorable for construction or space reasons to mount the light source 6 directly under the cover 2, it may also be arranged deeper vertically or laterally under the cover, as shown in FIG. 4. In order to guide the light from the light source 6 to the opening 5, a light guide 9 is arranged in the screw cap 4 in such a way that it ends in the opening 5. For the purpose of bundling the light which emerges from the light guide 9 through the opening 5, the end of the light guide 9 is designed in the form of a lens or a cone. The bundling means that the light is still visible to the eye from a greater distance.

Im weiteren ist ein Schaltelement 10 derart angebracht, dass es ein Signal an die Zentrale sendet, sobald der Schraubverschluss 4 in die "offene" Position gebracht worden ist. An der Zentrale wird das Signal als Störung oder Alarm gemeldet. Somit wird ein Versuch, das Gehäuse 1 zu öffnen, schon bei der Betätigung des Schraubverschlusses 4 eine Störungsmeldung oder einen Alarm auslösen bevor der Deckel 2 entfernt oder vom Boden 3 um eine Spaltweite abgehoben werden kann.Furthermore, a switching element 10 is attached in such a way that it sends a signal to the control center as soon as the screw cap 4 has been brought into the “open” position. The signal is reported as a fault or alarm at the control center. Thus, an attempt to open the housing 1 will trigger a fault message or an alarm when the screw cap 4 is actuated before the cover 2 can be removed or lifted from the base 3 by a gap.

Mit dieser Erfindung können als Sicherheitsmassnahme die einzelnen Intrusionsmelder auf die fachgerechte Verriegelung ihrer Gehäuse durch eine einfache visuelle Kontrolle der aufgeleuchteten Oeffnung an der Verriegelungsvorrichtung aus, einer Entfernung geprüft werden. Die Kontrolle kann ebenfalls von der Zentrale aus durch Prüfung des Zustandes des Schaltelementes 10 durchgeführt werden.With this invention, as a security measure, the individual intrusion detectors can be checked for the correct locking of their housings by a simple visual inspection of the illuminated opening on the locking device from a distance. The control can also be carried out from the control center by checking the state of the switching element 10.

Sollte während der Unscharfstellung der Anlage, zum Beispiel während des Tages, eine Sabotage eines Intrusionsmelders durch Oeffnen, Sabotieren und Wiederverschliessen des Gehäuses erfolgt sein, kann diese entdeckt werden, indem die Zentrale mit einer Memory-Funktion ausgestattet ist. Diese speichert das Störsignal, welches durch Betätigung des Schaltelementes 10 ausgelöst wurde, und löst bei der Scharfstellung der Anlage eine Störmeldung aus.If during the disarming of the system, for example during the day, an intrusion detector has been sabotaged by opening, sabotaging and reclosing the housing, this can be detected by the control panel being equipped with a memory function. This stores the interference signal, which was triggered by actuation of the switching element 10, and triggers an error message when the system is armed.

Claims (7)

Intrusionsmelder mit einem von einem Gehäuse (1) umschlossenen Bewegungssensor und einer Auswerteschaltung, welche ein Signal abgibt, wenn sich das Ausgangssignal des Bewegungssensors in einer vorbestimmten Weise ändert, wobei das Gehäuse (1) aus einem Deckel (2) und einem Boden (3) besteht, wovon der Deckel (2) eine Verriegelungsvorrichtung (4) enthält, welche den Deckel (2) mit dem Boden (3) fest verbindet und im Gehäuseinnern eine Lichtquelle vorhanden ist dadurch gekennzeichnet , dass die Verriegelungsvorrichtung (4) eine bewegbare Oeffnung (5) aufweist, durch die bei korrekter Verriegelung vom Deckel (2) und Boden (3) die im Gehäuseinnern angebrachte Lichtquelle (6) von aussen sichtbar ist.Intrusion detector with a motion sensor enclosed by a housing (1) and an evaluation circuit which emits a signal when the output signal of the motion sensor changes in a predetermined manner, the housing (1) comprising a cover (2) and a base (3) , of which the cover (2) contains a locking device (4) which firmly connects the cover (2) to the bottom (3) and a light source is present inside the housing, characterized in that the locking device (4) has a movable opening (5 ), through which, when the cover (2) and base (3) are locked correctly, the light source (6) inside the housing is visible from the outside. Intrusionsmelder gemäss Patentanspruch 1, dadurch gekennzeichnet, dass die Verriegelungsvorrichtung (4) drehbar ist.Intrusion detector according to claim 1, characterized in that the locking device (4) is rotatable. Intrusionsmelder gemäss Patentanspruch 1, dadurch gekennzeichnet, dass die Verriegelungsvorrichtung aus einem Schieber (8) besteht.Intrusion detector according to claim 1, characterized in that the locking device consists of a slide (8). Intrusionsmelder gemäss einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, dass die Verriegelungsvorrichtung (4) eine Sicherheitsschraube aufweist, welche sich nur mittels entsprechenden Spezialwerkzeugs lösen lässt.Intrusion detector according to one of Claims 1 to 3, characterized in that the locking device (4) has a security screw which can only be loosened by means of a corresponding special tool. Intrusionsmelder gemäss einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, dass die Lichtquelle (6) unter dem Deckel (2) des Gehäuses (1) versenkt oder seitlich bezüglich der Verriegelungsvorrichtung (4) verschoben angeordnet ist und ein Lichtleiter (9) das von der Lichtquelle (6) ausgehende Licht zur Oeffnung (5) in der Verriegelungsvorrichtung (4) leitet.Intrusion detector according to one of Claims 1 to 4, characterized in that the light source (6) is sunk under the cover (2) of the housing (1) or is laterally displaced with respect to the locking device (4) and an optical fiber (9) is provided by the Light source (6) directs outgoing light to the opening (5) in the locking device (4). Intrusionsmelder gemäss einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, dass die Lichtquelle (6) versenkt oder von der Verriegelungsvorrichtung (4) seitlich verschoben angeordnet ist und das von der Lichtquelle (6) ausgehende Licht durch Spiegel, Linsen oder Prismen zur Oeffnung (5) in der Verriegelungsvorrichtung (4) geleitet wird.Intrusion detector according to one of the claims 1 to 4, characterized in that the light source (6) is sunk or laterally displaced by the locking device (4) and the light emanating from the light source (6) through mirrors, lenses or prisms for opening (5 ) is passed in the locking device (4). Intrusionsmelder gemäss einem der Patentansprüche 1 bis 6, dadurch gekennzeichnet, dass ein Schaltelement (10) vorgesehen ist, welches bei Oeffnung der Verriegelungsvorrichtung ein Alarmsignal auslöst.Intrusion detector according to one of Claims 1 to 6, characterized in that a switching element (10) is provided which triggers an alarm signal when the locking device is opened.
EP19940103566 1993-03-19 1994-03-09 Intrusion detector Expired - Lifetime EP0616307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH847/93 1993-03-19
CH84793A CH685408A5 (en) 1993-03-19 1993-03-19 Intrusion detectors.

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EP0616307A1 true EP0616307A1 (en) 1994-09-21
EP0616307B1 EP0616307B1 (en) 1998-04-22

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AU (1) AU663989B2 (en)
CH (1) CH685408A5 (en)
DE (1) DE59405743D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2829271A1 (en) * 2001-08-28 2003-03-07 J C Decaux Illuminated display remote control has light sensors on neon tubes

Citations (3)

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Publication number Priority date Publication date Assignee Title
FR2567331A1 (en) * 1984-07-09 1986-01-10 Vibrachoc Sa DEVICE FOR VISUALIZING THE PLUG OF ELECTRICAL CONNECTORS ON AN AIRCRAFT TRAY
EP0353343A2 (en) * 1988-08-01 1990-02-07 The Eastern Company Switch lock with lighted position indicator
FR2681134A1 (en) * 1991-09-05 1993-03-12 Sagem Device for detecting the opening of an apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643249A (en) * 1970-03-16 1972-02-15 Ralph E Haywood Warning device for indicating locked position of door
US4683741A (en) * 1986-07-14 1987-08-04 Fields Roy A Light signal for door knob and lock assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567331A1 (en) * 1984-07-09 1986-01-10 Vibrachoc Sa DEVICE FOR VISUALIZING THE PLUG OF ELECTRICAL CONNECTORS ON AN AIRCRAFT TRAY
EP0353343A2 (en) * 1988-08-01 1990-02-07 The Eastern Company Switch lock with lighted position indicator
FR2681134A1 (en) * 1991-09-05 1993-03-12 Sagem Device for detecting the opening of an apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2829271A1 (en) * 2001-08-28 2003-03-07 J C Decaux Illuminated display remote control has light sensors on neon tubes

Also Published As

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AU5514894A (en) 1994-09-22
AU663989B2 (en) 1995-10-26
EP0616307B1 (en) 1998-04-22
CH685408A5 (en) 1995-06-30
DE59405743D1 (en) 1998-05-28

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