EP0607562A1 - Système radio d'alarme à transmission de messages de manière asynchrone aux canaux temporels à durée différente de périodes - Google Patents

Système radio d'alarme à transmission de messages de manière asynchrone aux canaux temporels à durée différente de périodes Download PDF

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Publication number
EP0607562A1
EP0607562A1 EP93119950A EP93119950A EP0607562A1 EP 0607562 A1 EP0607562 A1 EP 0607562A1 EP 93119950 A EP93119950 A EP 93119950A EP 93119950 A EP93119950 A EP 93119950A EP 0607562 A1 EP0607562 A1 EP 0607562A1
Authority
EP
European Patent Office
Prior art keywords
detectors
transmission
radio
alarm system
central unit
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.)
Ceased
Application number
EP93119950A
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German (de)
English (en)
Inventor
Horst Grundig E.M.V. Elsinger
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.)
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Original Assignee
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
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Filing date
Publication date
Application filed by Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH filed Critical Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Publication of EP0607562A1 publication Critical patent/EP0607562A1/fr
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/007—Details of data content structure of message packets; data protocols

Definitions

  • the invention relates to a radio alarm system according to the preamble of patent claim 1.
  • Modern alarm systems usually consist of a central unit (including power supply), switching devices for arming / disarming, automatic intrusion detectors, manually operated hold-up alarms, transmission devices and / or local alarm devices and a network.
  • the detectors used range from simple bolt or magnetic contacts to ultrasonic detectors of various types. Regardless of their mode of action, one can divide the detectors into three groups: detectors for outdoor surveillance, detectors for outer skin surveillance and detectors for indoor and property surveillance.
  • the automatic intrusion detectors are connected to the control center in series via so-called alarm lines and work according to the closed-circuit principle. A certain quiescent current flows through all detectors. If the current is interrupted by the triggering of a detector, an alarm message is issued. The alarm is also triggered if the detection line is destroyed or short-circuited at any point.
  • Various components such as switching devices, local alarm devices, etc. are additionally protected via a so-called sabotage line, i.e. an alarm is triggered if these components are opened or damaged.
  • the known radio alarm system consists of a central unit with a receiver unit for receiving radio signals from detectors in the form of data telegrams.
  • the receiver units are designed so that only data telegrams from detectors belonging to the radio alarm system are processed in order to trigger an alarm or a function.
  • each detector of the radio alarm system sends out at least two radio signals of different carrier frequencies, which are coded the same or different (in the sense of an identifier).
  • the central unit with its receiver unit receives at least two different radio signals from each detector and checks the affiliation of the detectors emitting the radio signals by checking the validity of the coding (identifier).
  • the radio signals emitted by the individual detectors are subjected to a field strength check in an evaluation unit, which further increases the interference immunity can be.
  • the message channels are formed using the frequency division multiplex method in this radio alarm system.
  • a radio transmission method for an alarm system is known from EP-A1-0 293 627, in which the same radio frequency is used to transmit information between a central unit and the components of the alarm system.
  • the individual message channels are formed using a time division multiplex method. These message channels are cyclical, i.e. queried sequentially in time in the central unit whether a message is transmitted via the respective time channel.
  • a polling cycle is only carried out in the radio transmission method according to EP-A1-0 293 627 if it has been found in a previous, much shorter total poll, in which all components are polled at the same time, that Information has arisen for at least one component (eg a detector).
  • the entire bandwidth of a single radio channel is available to each device, which, however, may only be used by the device for short periods of time.
  • the characters or character strings of different devices are interleaved and are transmitted at a correspondingly higher bit rate in the single radio channel, the time channel (message channel) assigned to each device being repeated periodically with the frame period.
  • the total bandwidth available for message transmission is divided into narrow frequency bands, each of which corresponds to a message transmission channel. Such a narrow frequency band is available to each device for the duration of the radio transmission.
  • frequency-division multiplex or time-division multiplex methods are used in radio alarm systems for message transmission, but applications of the code multiplex method are not known.
  • code division multiplexing the various messages carried over the common transmission medium (e.g. radio link) are modulated onto a carrier by basic modulation and the resulting narrow-band signal compared to the channel bandwidth is converted to the channel bandwidth by multiplex modulation with the aid of a code word characterizing the receiver spectrally spread.
  • a code generator is arranged in the transmitting devices of the radio stations, which generates a code identifying the transmitting device.
  • the invention has for its object to make the formation of message channels in a radio alarm system in such a way that the possibility of direct manipulation from the outside is reliably prevented and nevertheless an inexpensive implementation for the devices connected to the central unit is achieved.
  • the radio alarm system according to the invention has the advantage that no effort is required for time slot synchronization, as is essential for a TDMA system (Time Division Multiple Access). Only this makes it possible to design the predominantly numerical connections between detectors and central unit as unidirectional routes.
  • TDMA Time Division Multiple Access
  • the cost-effective implementation results from the fact that only one transmitter is required in the detectors.
  • the high receiver effort arises only in the (few) central unit (s); there at least the power supply is not a problem.
  • the messages have to be repeated at sufficiently small time intervals since they are listened to asynchronously by the receiver.
  • the association of property insurers is currently stipulating a data telegram exchange every 10 seconds. If one assumes that there are no disturbances 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 the Reduce security queries by a factor of 2.5 without having to accept any restrictions in the operational safety of the alarm system.
  • the design of the radio alarm system according to claim 2 has the advantage that a blockage of the radio channel with high probability is a sabotage and not a "natural" event (e.g. co-users of the frequency band).
  • the detectors and the radio link detectors to the central unit are monitored by cyclical messages.
  • Transmission pauses could possibly be made in the case of routine reports if the interference field strength of the radio channel is monitored by the central unit.
  • a transmission block between two pauses must be longer than the longest observation time T k .
  • each data telegram comprises successive blocks with code words of the same length. If a signal is received outside of the given code words or time intervals, this is a first indication of sabotage.
  • the embodiment of the radio alarm system according to claim 4 requires a small Circuit effort without having to accept restrictions in the operational safety of the alarm system.
  • the block diagram of Fig. 1 shows a radio alarm system with asynchronous transmission of messages via time channels of different periods.
  • a multiplicity of message channels for transmitting messages in the form of data telegrams between detectors M 1... Mn, in particular glass break detectors, infrared detectors, capacitive detectors, structure-borne sound detectors, opening detectors, microwave detectors, ultrasound detectors etc., between switching devices S, in particular block lock, time-controlled switching devices and electronic switching devices, and between control units ST, in particular automatic dialing devices for alarm devices, in particular sirens and flash lamps or the like. and a microprocessor-controlled central unit ZE are formed. In the transmission direction from the detectors M to the central unit ZE, the formation of the message channels takes place through different period duration of the message repetition T Mi which is characteristic of the individual detectors M. At least one radio channel is available for the transmission of the data telegrams.
  • the time difference between the individual period durations T Mi is greater than / equal to the transmission duration T T of the longest data telegram.
  • Each data telegram comprises successive blocks with code words of the same length to identify the respective detector M and to transmit the actual information.
  • L 200 message channels are formed.
  • the radio alarm system is operated in a frequency range of two to three GHz. With a transmission power of approx. 10 mW, the range (radio link) is approx. 30 m in the building and approx. 100 m in the free field.
  • a data telegram exchange is initiated, for example every 20 - 30 seconds.
  • interference mode ie when an interference field strength is detected, the data telegram is exchanged, for example, every 4 - 5 seconds, as is proposed in an unpublished application with the official file number P 42 39 702.2.
  • the system delay T s from the response of a detector M to the triggering of the alarm (as well as for sabotage detection) is 10 s.
  • T s The system delay T s from the response of a detector M to the triggering of the alarm (as well as for sabotage detection) is 10 s.
  • T s With a net data volume of 32 bits (4 bytes per telegram) and a number of 224 (16 million) different encodings, less than one false alarm can be expected in 100 years.
  • This high level of transmission security more than fulfills the demands placed on operational security by the association of property insurers.
  • the central unit ZE has a memory SP connected to the microprocessor MP, in which the required system query time T K and / or different periods of the repetition of the message are stored.
  • An adjustable divider T connected to a clock source TQ is arranged in the detector M, the division ratio of which can be remotely controlled or manually adjusted according to the assigned period T Mi.
  • central units sirens, telephone dialing devices etc. are connected to the central unit ZE via bidirectional radio transmission channels; i.e. these transmissions are additionally secured by returning an acknowledgment.
  • connection sequence in the radio alarm system according to the invention with asynchronous transmission of messages via time channels of different period duration T Mi is described in more detail below with reference to FIG. 2.
  • the receiver ie the central unit (or the switching device, control elements), observes the radio transmission channel during the period T K and evaluates all of them incoming telegrams according to their sender number. After T K has expired, at least one undisturbed telegram must have arrived from each transmitter.
  • T T 1 ms
  • T M200 max ⁇ T Wed ⁇ follows
  • T M1 4799.5 ms
  • S T of the transmission bursts is approximately 1: 5000, which means considerable energy savings in the detector.
EP93119950A 1992-12-18 1993-12-10 Système radio d'alarme à transmission de messages de manière asynchrone aux canaux temporels à durée différente de périodes Ceased EP0607562A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243026A DE4243026C2 (de) 1992-12-18 1992-12-18 Funkalarmanlage mit asynchroner Übermittlung von Meldungen über Zeitkanäle unterschiedlicher Periodendauern
DE4243026 1992-12-18

Publications (1)

Publication Number Publication Date
EP0607562A1 true EP0607562A1 (fr) 1994-07-27

Family

ID=6475811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119950A Ceased EP0607562A1 (fr) 1992-12-18 1993-12-10 Système radio d'alarme à transmission de messages de manière asynchrone aux canaux temporels à durée différente de périodes

Country Status (2)

Country Link
EP (1) EP0607562A1 (fr)
DE (1) DE4243026C2 (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070572A1 (fr) * 1999-05-13 2000-11-23 Honeywell Inc. Reseau de commande sans fil dans lequel les emissions se font dans des tranches de temps programmees
US7289466B2 (en) 2005-10-05 2007-10-30 Honeywell International Inc. Localization for low cost sensor network
US7394782B2 (en) 2005-07-14 2008-07-01 Honeywell International Inc. Reduced power time synchronization in wireless communication
US7446647B2 (en) 1999-05-13 2008-11-04 Honeywell International Inc. State validation using bi-directional wireless link
US7603129B2 (en) 2005-10-05 2009-10-13 Honeywell International Inc. Localization identification system for wireless devices
US7742394B2 (en) 2005-06-03 2010-06-22 Honeywell International Inc. Redundantly connected wireless sensor networking methods
US7801094B2 (en) 2005-08-08 2010-09-21 Honeywell International Inc. Integrated infrastructure supporting multiple wireless devices
US7826373B2 (en) 2005-01-28 2010-11-02 Honeywell International Inc. Wireless routing systems and methods
US7848223B2 (en) 2005-06-03 2010-12-07 Honeywell International Inc. Redundantly connected wireless sensor networking methods
US7986701B2 (en) 2008-06-13 2011-07-26 Honeywell International Inc. Wireless building control system bridge
US8085672B2 (en) 2005-01-28 2011-12-27 Honeywell International Inc. Wireless routing implementation
US8285326B2 (en) 2005-12-30 2012-10-09 Honeywell International Inc. Multiprotocol wireless communication backbone
US8413227B2 (en) 2007-09-28 2013-04-02 Honeywell International Inc. Apparatus and method supporting wireless access to multiple security layers in an industrial control and automation system or other system
US8463319B2 (en) 2005-06-17 2013-06-11 Honeywell International Inc. Wireless application installation, configuration and management tool
US8644192B2 (en) 2005-10-21 2014-02-04 Honeywell International Inc. Wireless transmitter initiated communication methods
US8811231B2 (en) 2005-10-21 2014-08-19 Honeywell International Inc. Wireless transmitter initiated communication systems
US9115908B2 (en) 2011-07-27 2015-08-25 Honeywell International Inc. Systems and methods for managing a programmable thermostat
US9157764B2 (en) 2011-07-27 2015-10-13 Honeywell International Inc. Devices, methods, and systems for occupancy detection
US9621371B2 (en) 2012-07-24 2017-04-11 Honeywell International Inc. Wireless sensor device with wireless remote programming
US10187222B2 (en) 2014-11-06 2019-01-22 Honeywell Technologies Sarl Methods and devices for communicating over a building management system network

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU475417B2 (en) * 1973-01-18 1975-05-22 Amalgamated Wireless (Australasia) Limited Improvements in monitoring arrangements
EP0155773A2 (fr) * 1984-02-27 1985-09-25 Pittway Corporation Système de communication
EP0181665A1 (fr) * 1984-11-02 1986-05-21 Koninklijke Philips Electronics N.V. Méthode de transmission d'information dans un système de transmission numérique
EP0293627A1 (fr) * 1987-05-19 1988-12-07 Ascom Radiocom AG Méthode de transmission radio
EP0368710A1 (fr) * 1988-10-25 1990-05-16 CERBERUS GUINARD Société dite: Dispositifs pour permettre de discriminer entre plusieurs phénomènes simultanés
US4928099A (en) * 1988-03-01 1990-05-22 Drake Donald L Telemetry system for automated remote calling and central dispatch of services, particularly taxicabs
EP0446979A1 (fr) * 1990-03-16 1991-09-18 Ericsson Radio Systems B.V. Système pour transmettre des signaux d'alarme avec répétition
DE4035070A1 (de) * 1990-11-05 1992-05-07 Norbert Schaaf Funkalarmanlage

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US4290056A (en) * 1979-07-05 1981-09-15 Ellsworth, Chow & Murphy, Inc. Protective system
DE3527331A1 (de) * 1985-07-31 1987-02-05 Philips Patentverwaltung Digitales funkuebertragungssystem
DE3607687A1 (de) * 1986-03-08 1987-09-10 Philips Patentverwaltung Verfahren und schaltungsanordnung zum weiterschalten einer funkverbindung in eine andere funkzelle eines digitalen funkuebertragungssystems
ATE102727T1 (de) * 1987-11-17 1994-03-15 Siemens Ag Kabelloses gefahrenmeldesystem.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU475417B2 (en) * 1973-01-18 1975-05-22 Amalgamated Wireless (Australasia) Limited Improvements in monitoring arrangements
EP0155773A2 (fr) * 1984-02-27 1985-09-25 Pittway Corporation Système de communication
EP0181665A1 (fr) * 1984-11-02 1986-05-21 Koninklijke Philips Electronics N.V. Méthode de transmission d'information dans un système de transmission numérique
EP0293627A1 (fr) * 1987-05-19 1988-12-07 Ascom Radiocom AG Méthode de transmission radio
US4928099A (en) * 1988-03-01 1990-05-22 Drake Donald L Telemetry system for automated remote calling and central dispatch of services, particularly taxicabs
EP0368710A1 (fr) * 1988-10-25 1990-05-16 CERBERUS GUINARD Société dite: Dispositifs pour permettre de discriminer entre plusieurs phénomènes simultanés
EP0446979A1 (fr) * 1990-03-16 1991-09-18 Ericsson Radio Systems B.V. Système pour transmettre des signaux d'alarme avec répétition
DE4035070A1 (de) * 1990-11-05 1992-05-07 Norbert Schaaf Funkalarmanlage
EP0484880A2 (fr) * 1990-11-05 1992-05-13 Norbert Schaaf Système radio d'alarme

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6901066B1 (en) 1999-05-13 2005-05-31 Honeywell International Inc. Wireless control network with scheduled time slots
WO2000070572A1 (fr) * 1999-05-13 2000-11-23 Honeywell Inc. Reseau de commande sans fil dans lequel les emissions se font dans des tranches de temps programmees
US7446647B2 (en) 1999-05-13 2008-11-04 Honeywell International Inc. State validation using bi-directional wireless link
US7826373B2 (en) 2005-01-28 2010-11-02 Honeywell International Inc. Wireless routing systems and methods
US8085672B2 (en) 2005-01-28 2011-12-27 Honeywell International Inc. Wireless routing implementation
US7848223B2 (en) 2005-06-03 2010-12-07 Honeywell International Inc. Redundantly connected wireless sensor networking methods
US7742394B2 (en) 2005-06-03 2010-06-22 Honeywell International Inc. Redundantly connected wireless sensor networking methods
US8463319B2 (en) 2005-06-17 2013-06-11 Honeywell International Inc. Wireless application installation, configuration and management tool
US7394782B2 (en) 2005-07-14 2008-07-01 Honeywell International Inc. Reduced power time synchronization in wireless communication
US7801094B2 (en) 2005-08-08 2010-09-21 Honeywell International Inc. Integrated infrastructure supporting multiple wireless devices
US7603129B2 (en) 2005-10-05 2009-10-13 Honeywell International Inc. Localization identification system for wireless devices
US7289466B2 (en) 2005-10-05 2007-10-30 Honeywell International Inc. Localization for low cost sensor network
US8811231B2 (en) 2005-10-21 2014-08-19 Honeywell International Inc. Wireless transmitter initiated communication systems
US8644192B2 (en) 2005-10-21 2014-02-04 Honeywell International Inc. Wireless transmitter initiated communication methods
US8285326B2 (en) 2005-12-30 2012-10-09 Honeywell International Inc. Multiprotocol wireless communication backbone
US8413227B2 (en) 2007-09-28 2013-04-02 Honeywell International Inc. Apparatus and method supporting wireless access to multiple security layers in an industrial control and automation system or other system
US7986701B2 (en) 2008-06-13 2011-07-26 Honeywell International Inc. Wireless building control system bridge
US9115908B2 (en) 2011-07-27 2015-08-25 Honeywell International Inc. Systems and methods for managing a programmable thermostat
US9157764B2 (en) 2011-07-27 2015-10-13 Honeywell International Inc. Devices, methods, and systems for occupancy detection
US9832034B2 (en) 2011-07-27 2017-11-28 Honeywell International Inc. Systems and methods for managing a programmable thermostat
US10174962B2 (en) 2011-07-27 2019-01-08 Honeywell International Inc. Devices, methods, and systems for occupancy detection
US10454702B2 (en) 2011-07-27 2019-10-22 Ademco Inc. Systems and methods for managing a programmable thermostat
US9621371B2 (en) 2012-07-24 2017-04-11 Honeywell International Inc. Wireless sensor device with wireless remote programming
US10409239B2 (en) 2012-07-24 2019-09-10 Honeywell International Inc. Wireless sensor device with wireless remote programming
US10187222B2 (en) 2014-11-06 2019-01-22 Honeywell Technologies Sarl Methods and devices for communicating over a building management system network

Also Published As

Publication number Publication date
DE4243026A1 (de) 1994-06-23
DE4243026C2 (de) 1994-10-13

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