EP1249805A1 - Intrusion detector - Google Patents

Intrusion detector Download PDF

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Publication number
EP1249805A1
EP1249805A1 EP01109263A EP01109263A EP1249805A1 EP 1249805 A1 EP1249805 A1 EP 1249805A1 EP 01109263 A EP01109263 A EP 01109263A EP 01109263 A EP01109263 A EP 01109263A EP 1249805 A1 EP1249805 A1 EP 1249805A1
Authority
EP
European Patent Office
Prior art keywords
alarm
detector
alarm display
intrusion
voltage regulator
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
EP01109263A
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German (de)
French (fr)
Other versions
EP1249805B1 (en
Inventor
Peter Stierli
Janko Meier
David Siegwart
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.)
Siemens Building Technologies AG
Original Assignee
Siemens Building Technologies AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to EP01109263A priority Critical patent/EP1249805B1/en
Priority to DE50101260T priority patent/DE50101260D1/en
Priority to ES01109263T priority patent/ES2213651T3/en
Priority to AT01109263T priority patent/ATE257262T1/en
Publication of EP1249805A1 publication Critical patent/EP1249805A1/en
Application granted granted Critical
Publication of EP1249805B1 publication Critical patent/EP1249805B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources

Definitions

  • the present invention relates to an intrusion detector, with a voltage regulator for the Input voltage, detector electronics and an alarm display.
  • intrusion detectors of this type that is formed, for example, by a light-emitting diode Alarm display arranged parallel to the detector electronics, so that two circuits in the detector are formed.
  • a first circuit from the voltage regulator to the detector electronics and a second Circuit from voltage regulator to light emitting diode.
  • the voltage regulator has to supply additional current, which is due negatively affects the power consumption of the detector.
  • bus detectors are detectors that with two wires are connected directly to a control center, with power and data transmission done over the same wires.
  • the invention is now intended to provide an intrusion detector which is particularly suitable for bus operation specified, which is characterized by a reduced power consumption. In doing so but the use for bus operation should not be understood as restrictive.
  • the inventive solution to the problem is characterized in that the Alarm display is arranged in series with the detector electronics and is operated with electricity, that the detector electronics need.
  • a second preferred embodiment of the intrusion detector according to the invention is characterized by means of a bypass switch arranged parallel to the alarm display the alarm display.
  • a third preferred embodiment is characterized in that the switch in normal operating status of the detector is closed and only in the event of an alarm or for test purposes is opened.
  • This switch is preferably from the detector electronics or from a control center actuated.
  • this Intrusion detectors for example, is a common passive infrared detector, such as that from Siemens Building Technologies AG, Cerberus Division and is distributed by Alarmcom AG.
  • Detectors contain a pyro sensor, an infrared mirror or a Fresnel lens arrangement to focus the incident infrared radiation on the pyrosensor and a circuit to evaluate the signals of the pyro sensor.
  • the detector can, for example named bus detector, which is connected directly to a control center with two wires, whereby supply and data transmission take place over the same wires.
  • the detector can, however also wired to the control center in another way or it can be a radio detector or not a control center for so-called stand-alone detectors.
  • the reference number 1 denotes the input of the circuit, the reference number 2 one Voltage regulator, the reference number 3 the detector electronics and the reference number 4 one Alarm display, which by a light emitting diode (LED) or by an acoustic signal transmitter is formed.
  • LED light emitting diode
  • the voltage regulator 2 can by a single Component formed, but it can also be a voltage stabilization from several Trade components.
  • the heart of the detector electronics 3 is a microprocessor, one Microcontroller, an ASIC or an evaluation unit without a microprocessor, microcontroller or ASIC.
  • the alarm display 4, which is connected in parallel to the detector electronics 3, is in the normal operating state, if no alarm state is detected, switched off.
  • the alarm display 4 is activated by the detector electronics 3 switched on and emits an alarm signal for a few seconds so that the The alarm is not only reported to the control center but is also displayed directly on the detector. always when the alarm indicator 4 is turned on, the voltage regulator 2 needs additional current deliver.
  • the alarm display can be operated with power pulses to reduce power consumption and then does not enter continuously for, for example, 3 seconds Alarm signal down, but only three short alarm signals every second. This intermittent However, operation can have a negative impact on detection tests.
  • a common detection test is the so-called walking test, in which the detector is remotely controlled or by a reed contact arranged inside the detector Magnet is switched to a test mode and one person monitors the detector Crosses space.
  • the alarm display 4 In this walking test, the alarm display 4 must also have an alarm signal as soon as the two criteria alarm and test mode are fulfilled.
  • the alarm display 4 is not arranged parallel to the detector electronics 3, but in series with it, and is between input 1 and the voltage regulator 2.
  • a switch 5 is arranged parallel to the alarm display 4. With switch 5 open the current flows from input 1 to voltage regulator 3 through alarm display 4, when closed Switch 5 is the alarm indicator 4 bridged and the current does not flow through this.
  • the switch 5 is controlled by the detector electronics 3 or via the control center. Switch 5 is normally closed and alarm indicator 4 is switched off. Just In the event of an alarm and for a walk test, switch 5 is opened.
  • the Alarm display 4 is formed by a light emitting diode or by an acoustic signal generator his. Although a light-emitting diode to indicate an alarm is already operated with approx. 0.5 to 1 mA the total power consumption of the detector is when using an LED as an alarm display 4 below 1 mA.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)
  • Glass Compositions (AREA)

Abstract

The alarm has an input-voltage regulator (2), alarm circuitry (3) and an alarm indicator (4). The alarm indicator is connected in series with the alarm circuitry (3) and supplied with the current required by the alarm circuitry. The Alarm indicator may be connected between the voltage input (1) to the circuit and the voltage regulator (2). A switch (5) may be connected in parallel with the alarm indicator for bridging over the alarm indicator.

Description

Die vorliegende Erfindung betrifft einen Intrusionsmelder, mit einem Spannungsregler für die Eingangsspannung, einer Melderelektronik und einer Alarmanzeige.The present invention relates to an intrusion detector, with a voltage regulator for the Input voltage, detector electronics and an alarm display.

Bei bekannten Intrusionsmeldern dieser Art ist die beispielsweise durch eine Leuchtdiode gebildete Alarmanzeige parallel zur Melderelektronik angeordnet, so dass im Melder zwei Stromkreise gebildet sind. Ein erster Kreis vom Spannungsregler zur Melderelektronik und ein zweiter Kreis vom Spannungsregler zur Leuchtdiode. Immer wenn die Leuchtdiode zur Anzeige eines Alarms eingeschaltet wird, muss der Spannungsregler zusätzlichen Strom liefern, was sich auf den Stromverbrauch des Melders negativ auswirkt. Da aber heute auch Intrusionsmelder mit immer weniger Strom auskommen müssen, besteht insbesondere bei den so genannten Bus-Meldern der Wunsch nach einer Senkung des Stromverbrauchs. Bus-Melder sind Melder, die mit zwei Drähten direkt an eine Zentrale angeschlossen sind, wobei Speisung und Datenübertragung über dieselben Drähte erfolgen.In known intrusion detectors of this type, that is formed, for example, by a light-emitting diode Alarm display arranged parallel to the detector electronics, so that two circuits in the detector are formed. A first circuit from the voltage regulator to the detector electronics and a second Circuit from voltage regulator to light emitting diode. Whenever the LED to indicate a If the alarm is switched on, the voltage regulator has to supply additional current, which is due negatively affects the power consumption of the detector. Since intrusion detectors are also used today less and less electricity is required, especially in the case of the so-called bus detectors the desire to reduce electricity consumption. Bus detectors are detectors that with two wires are connected directly to a control center, with power and data transmission done over the same wires.

Durch die Erfindung soll nun ein insbesondere für den Bus-Betrieb geeigneter Intrusionsmelder angegeben werden, der sich durch einen reduzierten Stromverbrauch auszeichnet. Dabei soll aber die Verwendung für Bus-Betrieb nicht als einschränkend verstanden werden.The invention is now intended to provide an intrusion detector which is particularly suitable for bus operation specified, which is characterized by a reduced power consumption. In doing so but the use for bus operation should not be understood as restrictive.

Die erfindungsgemässe Lösung der gestellten Aufgabe ist dadurch gekennzeichnet, dass die Alarmanzeige in Serie zur Melderelektronik angeordnet ist und mit dem Strom betrieben wird, den die Melderelektronik benötigt.The inventive solution to the problem is characterized in that the Alarm display is arranged in series with the detector electronics and is operated with electricity, that the detector electronics need.

Bei der erfindungsgemässen Serienschaltung von Melderelektronik und Alarmanzeige fliesst unabhängig davon, ob die Alarmanzeige eingeschaltet ist, immer gleich viel Strom und die Alarmanzeige benötigt im eingeschalteten Zustand keinen zusätzlichen Strom vom Spannungsregler.In the series connection of detector electronics and alarm display according to the invention flows regardless of whether the alarm display is switched on, the same amount of current and the When switched on, the alarm display does not require any additional current from the voltage regulator.

Eine erste bevorzugte Ausführungsform des erfindungsgemässen Intrusionsmelders ist dadurch gekennzeichnet, dass die Alarmanzeige zwischen dem Spannungseingang der Schaltung und dem Spannungsregler angeordnet ist.This is a first preferred embodiment of the intrusion detector according to the invention marked that the alarm indicator between the voltage input of the circuit and the voltage regulator is arranged.

Eine zweite bevorzugte Ausführungsform des erfindungsgemässen Intrusionsmelders ist gekennzeichnet durch einen parallel zur Alarmanzeige angeordneten Schalter zur Überbrückung der Alarmanzeige. A second preferred embodiment of the intrusion detector according to the invention is characterized by means of a bypass switch arranged parallel to the alarm display the alarm display.

Eine dritte bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass der Schalter im normalen Betriebszustand des Melders geschlossen ist und nur im Alarmfall oder fürTestzwecke geöffnet wird.A third preferred embodiment is characterized in that the switch in normal operating status of the detector is closed and only in the event of an alarm or for test purposes is opened.

Vorzugsweise ist dieser Schalter durch die Melderelektronik oder von einer Zentrale aus betätigbar.This switch is preferably from the detector electronics or from a control center actuated.

Im folgenden wird die Erfindung anhand von Ausführungsbeispielen und der Zeichnungen näher erläutert; es zeigt:

Fig. 1
ein Blockschaltbild mit den zum Verständnis der Erfindung wesentlichen Teilen der Schaltung eines Intrusionsmelders bekannter Bauart; und
Fig. 2
ein Blockschaltbild mit den zum Verständnis der Erfindung wesentlichen Teilen der Schaltung eines erfindungsgemässen Intrusionsmelders.
The invention is explained in more detail below with the aid of exemplary embodiments and the drawings; it shows:
Fig. 1
a block diagram with the essential for understanding the invention parts of the circuit of an intrusion detector of a known type; and
Fig. 2
a block diagram with the essential for understanding the invention parts of the circuit of an intrusion detector according to the invention.

In Fig. 1 ist ein Ausschnitt aus der Schaltung eines Intrusionsmelders dargestellt, wobei dieser Intrusionsmelder beispielsweise ein üblicher Passiv-Infrarotmelder ist, wie er von der Siemens Building Technologies AG, Cerberus Division und von derAlarmcom AG vertrieben wird. Derartige Melder enthalten einen Pyrosensor, einen Infrarotspiegel oder eine Fresnellinsen-Anordnung zur Fokussierung der auftreffenden Infrarotstrahlung auf denPyrosensor und eine Schaltung zur Auswertung der Signale des Pyrosensors. Der Melder kann beispielsweise ein so genannter Bus-Melder sein, welcher mit zwei Drähten direkt an eine Zentrale angeschlossen ist, wobei Speisung und Datenübertragung über die selben Drähte erfolgen. Der Melder kann aber auch auf andere Art mit der Zentrale verdrahtet oder er kann ein Funkmelder oder ein nicht an eine Zentrale angeschlossener so genannter Stand-alone-Melder sein.In Fig. 1 a section of the circuit of an intrusion detector is shown, this Intrusion detectors, for example, is a common passive infrared detector, such as that from Siemens Building Technologies AG, Cerberus Division and is distributed by Alarmcom AG. such Detectors contain a pyro sensor, an infrared mirror or a Fresnel lens arrangement to focus the incident infrared radiation on the pyrosensor and a circuit to evaluate the signals of the pyro sensor. The detector can, for example named bus detector, which is connected directly to a control center with two wires, whereby supply and data transmission take place over the same wires. The detector can, however also wired to the control center in another way or it can be a radio detector or not a control center for so-called stand-alone detectors.

Das Bezugszeichen 1 bezeichnet den Eingang der Schaltung, das Bezugszeichen 2 einen Spannungsregler, das Bezugszeichen 3 die Melderelektronik und das Bezugszeichen 4 eine Alarmanzeige, welche durch eine Leuchtdiode (LED) oder durch einen akustischen Signalgeber gebildet ist. Am Eingang 1 liegt beispielsweise eine Spannung von 12 V, die imSpannungsregler 2 auf beispielsweise 5 V herabgeregelt wird. Der Spannungsregler 2 kann durch ein einziges Bauteil gebildet sein, es kann sich aber auch um eine Spannungsstabilisierung aus mehreren Bauteilen handeln. Die Melderelektronik 3 enthält als Herzstück einen Mikroprozessor, einen Mikrokontroller, einen ASIC oder eine Auswerteeinheit ohne Mikroprozessor, Mikrokontroller oder ASIC. Die Alarmanzeige 4, welche parallel zur Melderelektronik 3 geschaltet ist, ist im normalen Betriebszustand, wenn kein Alarmzustand detektiert wird, ausgeschaltet.The reference number 1 denotes the input of the circuit, the reference number 2 one Voltage regulator, the reference number 3 the detector electronics and the reference number 4 one Alarm display, which by a light emitting diode (LED) or by an acoustic signal transmitter is formed. For example, there is a voltage of 12 V at input 1, that in the voltage regulator 2 is regulated down to 5 V, for example. The voltage regulator 2 can by a single Component formed, but it can also be a voltage stabilization from several Trade components. The heart of the detector electronics 3 is a microprocessor, one Microcontroller, an ASIC or an evaluation unit without a microprocessor, microcontroller or ASIC. The alarm display 4, which is connected in parallel to the detector electronics 3, is in the normal operating state, if no alarm state is detected, switched off.

Im Alarmfall, bei Detektion eines Eindringlings, wird die Alarmanzeige 4 durch die Melderelektronik 3 eingeschaltet und gibt während einigen Sekunden ein Alarmsignal ab, so dass der Alarm nicht nur an die Zentrale gemeldet sondern auch direkt am Melder angezeigt wird. Immer wenn die Alarmanzeige 4 eingeschaltet wird, muss der Spannungsregler 2 zusätzlichen Strom liefern. Zur Senkung des Stromverbrauchs kann die Alarmanzeige mit Strompulsen betrieben werden und gibt dann nicht mehr ununterbrochen während beispielsweise 3 Sekunden ein Alarmsignal ab, sondern nur drei kurze Alarmsignale im Sekundentakt. Dieser intermittierende Betrieb kann sich aber bei Detektionstests negativ auswirken.In the event of an alarm, when an intruder is detected, the alarm display 4 is activated by the detector electronics 3 switched on and emits an alarm signal for a few seconds so that the The alarm is not only reported to the control center but is also displayed directly on the detector. always when the alarm indicator 4 is turned on, the voltage regulator 2 needs additional current deliver. The alarm display can be operated with power pulses to reduce power consumption and then does not enter continuously for, for example, 3 seconds Alarm signal down, but only three short alarm signals every second. This intermittent However, operation can have a negative impact on detection tests.

Ein häufig durchgeführter Detektionstest ist der so genannte Gehtest, bei dem der Melder ferngesteuert oder durch einen auf einen im Melderinneren angeordneten Reed-Kontakt wirkenden Magnet in einen Testmode umgeschaltet wird und eine Person den vom Melder überwachten Raum durchschreitet. Bei diesem Gehtest muss die Alarmanzeige 4 ebenfalls ein Alarmsignal ageben, sobald die beiden Kriterien Alarm und Testmode erfüllt sind.A common detection test is the so-called walking test, in which the detector is remotely controlled or by a reed contact arranged inside the detector Magnet is switched to a test mode and one person monitors the detector Crosses space. In this walking test, the alarm display 4 must also have an alarm signal as soon as the two criteria alarm and test mode are fulfilled.

Bei der in Fig. 2 dargestellten Schaltung, in der gleiche Komponenten wie in Fig. 1 mit gleichen Bezugszeichen bezeichnet sind, ist die Alarmanzeige 4 nicht parallel zur Melderelektronik 3 angeordnet, sondern in Serie zu dieser, und liegt zwischen dem Eingang 1 und dem Spannungsregler 2. Parallel zur Alarmanzeige 4 ist ein Schalter 5 angeordnet. Bei geöffnetem Schalter 5 fliesst der Strom vom Eingang 1 zum Spannungsregler 3 durch die Alarmanzeige 4, bei geschlossenem Schalter 5 ist die Alarmanzeige 4 überbrückt und der Strom fliesst nicht durch diese. Die Steuerung des Schalters 5 erfolgt durch die Melderelektronik 3 oder über die Zentrale. Im Normalfall ist der Schalter 5 geschlossen und die Alarmanzeige 4 ist ausgeschaltet. Nur im Alarmfall und für einen Gehtest wird der Schalter 5 geöffnet.In the circuit shown in Fig. 2, in the same components as in Fig. 1 with the same Are designated, the alarm display 4 is not arranged parallel to the detector electronics 3, but in series with it, and is between input 1 and the voltage regulator 2. A switch 5 is arranged parallel to the alarm display 4. With switch 5 open the current flows from input 1 to voltage regulator 3 through alarm display 4, when closed Switch 5 is the alarm indicator 4 bridged and the current does not flow through this. The switch 5 is controlled by the detector electronics 3 or via the control center. Switch 5 is normally closed and alarm indicator 4 is switched off. Just In the event of an alarm and for a walk test, switch 5 is opened.

Bei der in Fig. 2 dargestellten Schaltung fliesst unabhängig davon, ob die Alarmanzeige 4 eingeschaltet ist, oder nicht, gleich viel Strom, so dass für den Betrieb der Alarmanzeige kein zusätzlicher Strom vom Spannungsregler 2 erforderlich ist. Wie schon erwähnt wurde, kann die Alarmanzeige 4 durch eine Leuchtdiode oder durch einen akustischen Signalgeber gebildet sein. Obwohl eine Leuchtdiode zur Anzeige eines Alarms bereits mit ca. 0.5 bis 1 mA betrieben werden muss, liegt der gesamte Stromverbrauch des Melders bei Verwendung einer Leuchtdiode als Alarmanzeige 4 unter 1 mA.In the circuit shown in Fig. 2 flows regardless of whether the alarm indicator 4 is turned on is, or not, the same amount of current, so that no additional for operating the alarm display Current from voltage regulator 2 is required. As already mentioned, the Alarm display 4 is formed by a light emitting diode or by an acoustic signal generator his. Although a light-emitting diode to indicate an alarm is already operated with approx. 0.5 to 1 mA the total power consumption of the detector is when using an LED as an alarm display 4 below 1 mA.

Claims (6)

Intrusionsmelder, mit einem Spannungsregler (2) für die Eingangsspannung, einer Melderelektronik (3) und einer Alarmanzeige (4), dadurch gekennzeichnet, dass die Alarmanzeige (4) in Serie zur Melderelektronik (3) angeordnet ist und mit dem Strom betrieben wird, den die Melderelektronik (3) benötigt.Intrusion detector, with a voltage regulator (2) for the input voltage, detector electronics (3) and an alarm indicator (4), characterized in that the alarm indicator (4) is arranged in series with the detector electronics (3) and is operated with the current that the detector electronics (3) are required. Intrusionsmelder nach Anspruch 1, dadurch gekennzeichnet, dass die Alarmanzeige (4) zwischen dem Spannungseingang (1) der Schaltung und dem Spannungsregler (2) angeordnet ist.Intrusion detector according to claim 1, characterized in that the alarm display (4) between the voltage input (1) of the circuit and the voltage regulator (2) is arranged. Intrusionsmelder nach Anspruch 2, gekennzeichnet durch einen parallel zur Alarmanzeige (4) angeordneten Schalter (5) zur Überbrückung der Alarmanzeige (4).Intrusion detector according to claim 2, characterized by a switch (5) arranged parallel to the alarm display (4) for bridging the alarm display (4). Intrusionsmelder nach Anspruch 3, dadurch gekennzeichnet, dass der Schalter (5) im normalen Betriebszustand des Melders geschlossen ist und nur im Alarmfall oder für Testzwecke geöffnet wird.Intrusion detector according to claim 3, characterized in that the switch (5) is closed in the normal operating state of the detector and is only opened in the event of an alarm or for test purposes. Intrusionsmelder nach Anspruch 4, dadurch gekennzeichnet, dass der Schalter (5) durch die Melderelektronik (3) oder von einer Zentrale aus betätigbar ist.Intrusion detector according to claim 4, characterized in that the switch (5) can be actuated by the detector electronics (3) or from a control center. Intrusionsmelder nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Alarmanzeige (4) durch eine Leuchtdiode oder einen akustischen Signalgeber gebildet ist.Intrusion detector according to one of claims 1 to 5, characterized in that the alarm display (4) is formed by a light-emitting diode or an acoustic signal transmitter.
EP01109263A 2001-04-14 2001-04-14 Intrusion detector Expired - Lifetime EP1249805B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01109263A EP1249805B1 (en) 2001-04-14 2001-04-14 Intrusion detector
DE50101260T DE50101260D1 (en) 2001-04-14 2001-04-14 intrusion detector
ES01109263T ES2213651T3 (en) 2001-04-14 2001-04-14 INTRUSION NOTICE.
AT01109263T ATE257262T1 (en) 2001-04-14 2001-04-14 INTRUSION DETECTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01109263A EP1249805B1 (en) 2001-04-14 2001-04-14 Intrusion detector

Publications (2)

Publication Number Publication Date
EP1249805A1 true EP1249805A1 (en) 2002-10-16
EP1249805B1 EP1249805B1 (en) 2004-01-02

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EP01109263A Expired - Lifetime EP1249805B1 (en) 2001-04-14 2001-04-14 Intrusion detector

Country Status (4)

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EP (1) EP1249805B1 (en)
AT (1) ATE257262T1 (en)
DE (1) DE50101260D1 (en)
ES (1) ES2213651T3 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556485A1 (en) * 1983-10-14 1985-06-14 Badens Gerard Device intended to cause intruders (human or small rodents) to depart from a premises protected by the device, capable of being used as an anti-theft or anti-rat device, by emitting a sound which is inaudible outside the premises
DE29620455U1 (en) * 1996-11-13 1997-02-20 Ver Energiewerke Ag Warning system for monitoring enclosed spaces against unauthorized entry, especially for motor vehicles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556485A1 (en) * 1983-10-14 1985-06-14 Badens Gerard Device intended to cause intruders (human or small rodents) to depart from a premises protected by the device, capable of being used as an anti-theft or anti-rat device, by emitting a sound which is inaudible outside the premises
DE29620455U1 (en) * 1996-11-13 1997-02-20 Ver Energiewerke Ag Warning system for monitoring enclosed spaces against unauthorized entry, especially for motor vehicles

Also Published As

Publication number Publication date
DE50101260D1 (en) 2004-02-05
ES2213651T3 (en) 2004-09-01
ATE257262T1 (en) 2004-01-15
EP1249805B1 (en) 2004-01-02

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