EP0599192B1 - Method for monitoring and operating a radio link between sensors and central unit of an alarm system - Google Patents

Method for monitoring and operating a radio link between sensors and central unit of an alarm system Download PDF

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Publication number
EP0599192B1
EP0599192B1 EP93118557A EP93118557A EP0599192B1 EP 0599192 B1 EP0599192 B1 EP 0599192B1 EP 93118557 A EP93118557 A EP 93118557A EP 93118557 A EP93118557 A EP 93118557A EP 0599192 B1 EP0599192 B1 EP 0599192B1
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EP
European Patent Office
Prior art keywords
central unit
monitoring
sensors
alarm
alarm system
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Expired - Lifetime
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EP93118557A
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German (de)
French (fr)
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EP0599192A1 (en
Inventor
Horst Grundig E.M.V. Elektro-Mech. Elsinger
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Grundig AG
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Grundig AG
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/007Wireless interrogation

Definitions

  • the invention relates to a method for monitoring and for operating a radio link between the outstations and the central unit of an alarm system after Preamble of claim 1.
  • the data telegrams must be in a certain Time interval between the central unit and the Signaling units are exchanged for malfunctions on the To be able to recognize radio link. Through this additional Exchanging the data telegrams becomes additional energy consumed. Since the signaling units with battery, rechargeable battery or Solar energy must be operated in order not to Can lose advantage of wireless installation the additional burden of regular Data telegrams significantly increase battery life shorten or, in the case of solar power supply, a require more powerful solar cells.
  • the invention is therefore based on the object caused by the exchange of data telegrams additional energy consumption to a minimum reduce the reliability of the alarm system is at least preserved or improved.
  • the Central unit or the outstations for example Monitoring sensors, the field strength in the for the Alarm system available radio channels supervised. Depending on the occurrence of non-operational Field strengths are then the time intervals for the Exchange of data telegrams changed.
  • interference field strengths can be caused by other devices that work in the microwave range, or they are generated with the intention of disrupting the radio alarm system.
  • a data telegram exchange is initiated more frequently than in normal operation. In normal operation, ie if no interference field strength is detected, a data telegram exchange is initiated, for example, every 20-30 seconds. In interference mode, ie when an interference field strength is detected, the data telegram exchange takes place, for example, every 4-5 seconds. The association of property insurers is currently stipulating a data telegram exchange every 10 seconds.
  • the energy consumption can be reduced by a factor of 2.5 by means of the safety queries, without accepting any restrictions in the operational safety of the alarm system have to.
  • the Data telegrams not only information about the Security of the radio link included, but if at the same time information about the functionality of the reporting units are transmitted. So through that Data telegram, for example, the functionality of the Sensors or the transmitter / receiver units are monitored will. In this way, the data telegrams can also used to check the functionality, whereby the energy consumption remains low, because there is no separate exchange of information.
  • This configuration of the invention makes it possible to only change the batteries or the accumulator when the There is a need for this.
  • the user of the Alarm system is no longer forced, as a precaution Exchange the energy storage to make without specifically there is a need to avoid that Signaling units due to a lack of power supply fail.
  • Another embodiment of the invention provides that in the event of an interruption in the data telegram exchange for a predetermined time alarm is triggered. This measure ensures that for example in the event of a failure of monitoring sensors the alarm is activated by disassembly or destruction becomes.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)

Abstract

The invention relates to a method for monitoring and operating a radio link between the monitoring sensors and the central unit of an alarm system. Alarm systems of this kind are preferably used for monitoring industrial or private buildings. To keep the installation work as simple as possible radio alarm systems are often used which comprise a central unit and various indicating units. To ensure operational reliability, data messages are exchanged between the indicating units and the central unit at specific time intervals. The disadvantage of the known radio alarm systems is their high energy consumption, in particular in the case of the indicating units which are run from batteries or accumulators. It is therefore proposed to control the exchange of data messages as a function of the disturbances present in the radio channels. In this way the time interval between the exchanges of data messages can be increased if no disturbances are present.

Description

Die Erfindung betrifft ein Verfahren zur Überwachung und zum Betrieb einer Funkstrecke zwischen den Außenstationen und der Zentraleinheit einer Alarmanlage nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for monitoring and for operating a radio link between the outstations and the central unit of an alarm system after Preamble of claim 1.

Zur Überwachung von Gewerbe- oder Privatgebäuden werden in der Regel Alarmanlagen installiert, die eine Innenraumüberwachung und eine Außenhautsicherung ermöglichen. Bereits bei vergleichsweise kleinen Gebäuden ist eine Vielzahl von einzelnen Sensoren notwendig, um die einzelnen Räume und deren Zugangsmöglichkeiten, beispielsweise Fenster, zu überwachen.For monitoring commercial or private buildings usually alarm systems installed that a Interior surveillance and an outer skin protection enable. Even in comparatively small buildings a large number of individual sensors is necessary to the individual rooms and their access options, monitor windows, for example.

Um den Installationsaufwand, der durch das Verlegen von Leitungen, die die einzelnen Sensoren und die Zentraleinheit verbinden, zu verringern, wird in der europäischen Patentanmeldung EP 0 253 156 A1 vorgeschlagen, in jedem Raum eine Kommunikationseinheit anzubringen. Diese Kommunikationseinheit wird mit der Zentraleinheit über eine Meldeleitung verbunden. Die einzelnen Überwachungssensoren sind mit einer Sende- und Empfangseinrichtung ausgestattet, so daß sie mit der Kommunikationseinheit drahtlos verbunden sind. Bei dieser Ausführung einer Alarmanlage verringert sich der Installationsaufwand zwar beträchtlich, es müssen aber immer noch Leitungen in die einzelnen Räume gelegt werden.To the installation effort caused by laying Lines that the individual sensors and the Connect central unit, will decrease in the European patent application EP 0 253 156 A1 proposed a communication unit in each room to attach. This communication unit is with the Central unit connected via an alarm line. The individual monitoring sensors are with a transmit and Receiving device equipped so that it with the Communication unit are connected wirelessly. This type of alarm system is reduced the installation effort is considerable, it must but still lines in the individual rooms will.

Eine verbesserte Alarmanlage ist aus der deutschen Offenlegungsschrift DE 40 35 070 A1 bekannt. Bei dieser Alarmanlage werden alle Meldeeinheiten, die aus Sensoren und Sende-/Empfangseinheiten bestehen, direkt über eine Funkstrecke mit der Zentraleinheit drahtlos verbunden. Bei einer derartigen Anlage entfallen sämtliche Installationsarbeiten. Um die vom Verband der Sachversicherer gestellten bzw. zu erwartenden Forderungen an die Betriebssicherheit zu erfüllen, werden Vorkehrungen getroffen, die eine Fehlalarmauslösung und eine Blockierung des Alarms verhindern.
Dies wird erreicht, indem die Meldeeinheiten jeweils zwei Funksignale abstrahlen, die eine unterschiedliche Trägerfrequenz aufweisen und in Datentelegrammen fest vorgegebener Codierung verschlüsselt sind. Weiterhin wird die Feldstärke der empfangenen Signale der Meldeeinheiten überprüft und bei Überschreiten eines vorgegebenen Feldstärkewertes über einen bestimmten Zeitraum wird eine Warnanzeige ausgelöst.
An improved alarm system is known from German Offenlegungsschrift DE 40 35 070 A1. With this alarm system, all signaling units consisting of sensors and transmitter / receiver units are connected wirelessly directly to the central unit via a radio link. With such a system, all installation work is eliminated. In order to meet the requirements placed on operational security by the association of property insurers, or to be expected, precautions are taken to prevent false alarms being triggered and the alarm being blocked.
This is achieved in that the signaling units each emit two radio signals which have a different carrier frequency and are encoded in data telegrams of a fixed, predetermined coding. Furthermore, the field strength of the received signals of the signaling units is checked and a warning is triggered if a predetermined field strength value is exceeded for a certain period of time.

Die Datentelegramme müssen in einem bestimmten Zeitabstand zwischen der Zentraleinheit und den Meldeeinheiten ausgetauscht werden, um Störungen auf der Funkstrecke erkennen zu können. Durch diesen zusätzlichen Austausch der Datentelegramme wird zusätzliche Energie verbraucht. Da die Meldeeinheiten mit Batterie, Akku oder Solarenergie betrieben werden müssen, um nicht den Vorteil der kabellosen Installation zu verlieren, kann die zusätzliche Belastung durch die regelmäßigen Datentelegramme die Batterielebensdauer erheblich verkürzen oder, im Fall der Solarstromversorgung, eine leistungsfähigere Solarzelle erfordern.The data telegrams must be in a certain Time interval between the central unit and the Signaling units are exchanged for malfunctions on the To be able to recognize radio link. Through this additional Exchanging the data telegrams becomes additional energy consumed. Since the signaling units with battery, rechargeable battery or Solar energy must be operated in order not to Can lose advantage of wireless installation the additional burden of regular Data telegrams significantly increase battery life shorten or, in the case of solar power supply, a require more powerful solar cells.

Eine Verbesserung in Bezug auf den Stromverbrauch wird bei einem Funkübertragungsverfahren nach der europäischen Offenlegungsschrift 0 293 627 A1 erreicht, indem die Außenstationen ausgeschaltet bleiben, solange keine Informationen anliegen, d.h. solange kein Alarmfall vorliegt. Die Außenstationen werden nur im Alarmfall eingeschaltet. In regelmäßigen Zeitabständen wird von der Zentraleinheit eine Summenabfrage durchgeführt, bei der alle Außenstationen gleichzeitig abgefragt werden. Nur im Fall eines Alarmes, wenn also mindestens eine Außenstation bei der Summenabfrage eingeschaltet ist, wird ein Abfragezyklus gestartet, bei dem nacheinander alle Außenstationen einzeln abgefragt werden. Durch diese Maßnahme wird zwar der Energieverbrauch gesenkt, es ist aber auch die Sicherheit der Alarmanlage vermindert, da ein Austausch von Daten nur im Alarmfall durchgeführt wird. Eine defekte oder außer Betrieb gesetzte Außenstation wird nicht als defekt erkannt, sondern als eine Außenstation, an der keine Information anliegt, d.h. kein Alarmfall vorliegt.An improvement in terms of power consumption will be with a radio transmission method according to the European Laid-open specification 0 293 627 A1 achieved by the Outstations remain switched off as long as none Information, i.e. as long as there is no alarm is present. The outstations are only activated in the event of an alarm switched on. At regular intervals the Central unit carried out a sum query in which all outstations can be queried at the same time. Only in In the event of an alarm, if at least one Outstation is switched on when summing up, a query cycle is started, in which all outstations can be queried individually. Through this Measure, although energy consumption is reduced, it is but also reduces the security of the alarm system because data is only exchanged in the event of an alarm becomes. A broken or out of order Outstation is not recognized as defective, but as an outdoor station at which no information is available, i.e. there is no alarm.

Der Erfindung liegt deshalb die Aufgabe zugrunde, den durch den Austausch der Datentelegramme verursachten zusätzlichen Energieverbrauch auf ein Minimum zu reduzieren, wobei die Zuverlässigkeit der Alarmanlage zumindest erhalten bleibt oder verbessert wird. The invention is therefore based on the object caused by the exchange of data telegrams additional energy consumption to a minimum reduce the reliability of the alarm system is at least preserved or improved.

Diese Aufgabe wird bei einem gattungsgemäßen Verfahren durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This task is carried out in a generic method by the characterizing features of claim 1 solved. Advantageous embodiments of the invention are specified in the subclaims.

Entsprechend der Erfindung wird im Empfänger der Zentraleinheit oder der Außenstationen, beispielsweise Überwachungssensoren, die Feldstärke in den für die Alarmanlage zur Verfügung stehenden Funkkanälen überwacht. In Abhängigkeit vom Auftreten betriebsuntypischer Feldstärken werden dann die Zeitabstände für den Austausch der Datentelegramme verändert.According to the invention, the Central unit or the outstations, for example Monitoring sensors, the field strength in the for the Alarm system available radio channels supervised. Depending on the occurrence of non-operational Field strengths are then the time intervals for the Exchange of data telegrams changed.

Da die Funkalarmanlagen auch in einem Frequenzbereich von 2 - 3 GHz betrieben werden, können zum einen Störfeldstärken von anderen Geräten, die im Mikrowellenbereich arbeiten, verursacht werden, oder sie werden, mit der Absicht die Funkalarmanlage zu stören, erzeugt. In dem Fall, daß derartige Störungen erkannt werden, wird ein Datentelegrammaustausch häufiger veranlaßt als im Normalbetrieb. Im Normalbetrieb, d.h. wenn keine Störfeldstärke detektiert wird, wird ein Datentelegrammaustausch beispielsweise alle 20 - 30 Sekunden veranlaßt. Im Störbetrieb, d.h. wenn eine Störfeldstärke detektiert wird, erfolgt der Datentelegrammaustausch beispielsweise alle 4 - 5 Sekunden.
Vom Verband der Sachversicherer ist im Moment für alle 10 Sekunden ein Datentelegrammaustausch vorgeschrieben. Wenn man davon ausgeht, daß während der überwiegenden Zeit keine Störungen vorliegen und somit die durchschnittliche Zeitdauer zwischen zwei Datentelegrammen etwa 25 Sekunden beträgt, läßt sich der Energieverbrauch durch die Sicherheitsabfragen um den Faktor 2,5 reduzieren, ohne Einschränkungen in der Betriebssicherheit der Alarmanlage hinnehmen zu müssen.
Since the radio alarm systems are also operated in a frequency range of 2 - 3 GHz, interference field strengths can be caused by other devices that work in the microwave range, or they are generated with the intention of disrupting the radio alarm system. In the event that such faults are recognized, a data telegram exchange is initiated more frequently than in normal operation. In normal operation, ie if no interference field strength is detected, a data telegram exchange is initiated, for example, every 20-30 seconds. In interference mode, ie when an interference field strength is detected, the data telegram exchange takes place, for example, every 4-5 seconds.
The association of property insurers is currently stipulating a data telegram exchange every 10 seconds. If one assumes that there are no faults during the majority of the time and thus the average time between two data telegrams is about 25 seconds, the energy consumption can be reduced by a factor of 2.5 by means of the safety queries, without accepting any restrictions in the operational safety of the alarm system have to.

Als vorteilhaft wird es angesehen, wenn die Datentelegramme nicht nur Informationen über die Sicherheit der Funkstrecke enthalten, sondern wenn gleichzeitig Informationen über die Funktionsfähigkeit der Meldeeinheiten übertragen werden. So kann durch das Datentelegramm beispielsweise die Funktionsfähigkeit der Sensoren oder der Sende-/Empfangseinheiten überwacht werden. Auf diese Weise können die Datentelegramme auch zur Überprüfung der Funktionsfähigkeit benutzt werden, wobei der Energieaufwand unverändert niedrig bleibt, da ein separater Informationsaustausch entfällt.It is considered advantageous if the Data telegrams not only information about the Security of the radio link included, but if at the same time information about the functionality of the reporting units are transmitted. So through that Data telegram, for example, the functionality of the Sensors or the transmitter / receiver units are monitored will. In this way, the data telegrams can also used to check the functionality, whereby the energy consumption remains low, because there is no separate exchange of information.

Es hat sich auch als vorteilhaft erwiesen, mittels des Datentelegrammaustausches den Zustand der Batterieladung oder der Akkuladung an die Zentraleinheit weiterzuleiten und in der Zentraleinheit ein entsprechendes Warnsignal auszugeben, wenn der Ladezustand der Batterie oder des Akkus eine bestimmte Grenze, bei der noch ein sicherer Betrieb der Meldeeinheit gewährleistet ist, unterschritten hat.It has also proven advantageous to use the Data telegram exchange the state of the battery charge or forward the battery charge to the central unit and a corresponding warning signal in the central unit output when the state of charge of the battery or Batteries have a certain limit at which a safe one Operation of the signaling unit is guaranteed, has fallen below.

Durch diese Ausgestaltung der Erfindung ist es möglich, die Batterien bzw. den Akku erst zu wechseln, wenn die Notwendigkeit dazu gegeben ist. Der Benutzer der Alarmanlage ist nicht mehr gezwungen, vorsorglich einen Austausch der Energiespeicher vorzunehmen, ohne daß konkret die Notwendigkeit besteht, um zu vermeiden, daß Meldeeinheiten auf Grund mangelnder Stromversorgung ausfallen.This configuration of the invention makes it possible to only change the batteries or the accumulator when the There is a need for this. The user of the Alarm system is no longer forced, as a precaution Exchange the energy storage to make without specifically there is a need to avoid that Signaling units due to a lack of power supply fail.

Eine weitere Ausgestaltung der Erfindung sieht vor, daß bei einer Unterbrechung des Datentelegrammaustausches für eine vorbestimmte Zeit Alarm ausgelöst wird. Durch diese Maßnahme wird sichergestellt, daß beispielsweise bei einem Ausfall von Überwachungssensoren durch Demontage oder Zerstörung die Alarmgabe aktiviert wird.Another embodiment of the invention provides that in the event of an interruption in the data telegram exchange for a predetermined time alarm is triggered. This measure ensures that for example in the event of a failure of monitoring sensors the alarm is activated by disassembly or destruction becomes.

Claims (4)

  1. Method of monitoring and of operating a radio link between the central unit of an alarm system and its external stations which contain monitoring sensors, data telegrams being exchanged between the external stations and the central unit and the field strength in the available radio channels being monitored, characterized in that the time intervals for the exchange of the data telegrams are altered as a function of the occurrence of untypical operating field strengths.
  2. Method according to Claim 1, characterized in that the data telegrams exchanged contain items of information about the serviceability of the sensors.
  3. Method according to Claim 2, characterized in that the data telegrams contain items of information about the state of charge of the energy source of the external stations, and in that a warning signal is emitted in the central unit if the state of charge is too low.
  4. Method according to Claim 1 or Claim 2, characterized in that an alarm is also activated if the telegram exchange is interrupted for a specified period of time.
EP93118557A 1992-11-26 1993-11-18 Method for monitoring and operating a radio link between sensors and central unit of an alarm system Expired - Lifetime EP0599192B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4239702 1992-11-26
DE4239702A DE4239702C1 (en) 1992-11-26 1992-11-26 Method for monitoring and operating a radio link between the central unit of an alarm system and its outstations containing monitoring sensors

Publications (2)

Publication Number Publication Date
EP0599192A1 EP0599192A1 (en) 1994-06-01
EP0599192B1 true EP0599192B1 (en) 1998-10-28

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EP93118557A Expired - Lifetime EP0599192B1 (en) 1992-11-26 1993-11-18 Method for monitoring and operating a radio link between sensors and central unit of an alarm system

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AT (1) ATE172807T1 (en)
DE (2) DE4239702C1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337212A1 (en) * 1993-10-30 1995-05-04 Grundig Emv Radio alarm system with a large number of message channels formed by the frequency hopping process
DE4417632C2 (en) * 1994-05-19 1998-10-22 Diehl Stiftung & Co Method for operating a radio alarm system
DE4423171A1 (en) * 1994-07-04 1996-01-18 Norbert Schaaf Activation and deactivation control appts. for intruder alarm system
DE19506385C2 (en) * 1995-02-23 2002-03-07 Peter John Goddard Wireless hazard detection system and notification procedure
DE19517037A1 (en) * 1995-05-10 1996-11-14 Telenot Electronic Gmbh Radio alarm system
FR2766599B1 (en) * 1997-07-23 1999-09-03 Elf Antar France EVENT DETECTION DEVICE
GB2358503B (en) * 1997-10-11 2002-01-09 Menvier Alarm or detection system
FR2776100B1 (en) * 1998-03-12 2000-08-25 Bruno Enea ELECTRONIC SYSTEM FOR IDENTIFYING OBJECTS TO PREVENT LOSS, THEFT OR DISPLACEMENT
FR2985308B1 (en) * 2011-12-28 2020-06-05 Twipi Group DEVICE FOR MONITORING THE TEMPERATURE OF A PREMISES
GB2554744B (en) * 2016-10-07 2021-11-24 Orisec Ltd Control panel for a security alarm system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253156A1 (en) * 1986-06-25 1988-01-20 Siemens Aktiengesellschaft Intrusion alarm system
EP0293627A1 (en) * 1987-05-19 1988-12-07 Ascom Radiocom AG Radio transmission method
GB2207266B (en) * 1987-07-24 1990-04-04 Scanning Technology Limited Improvements in fire detection systems
DE4035070A1 (en) * 1990-11-05 1992-05-07 Norbert Schaaf RADIO ALARM SYSTEM

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Publication number Publication date
DE4239702C1 (en) 1994-03-24
DE59309097D1 (en) 1998-12-03
ATE172807T1 (en) 1998-11-15
EP0599192A1 (en) 1994-06-01

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