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ATE149262T1 - RADIO ALARM SYSTEM - Google Patents

RADIO ALARM SYSTEM

Info

Publication number
ATE149262T1
ATE149262T1 AT91118836T AT91118836T ATE149262T1 AT E149262 T1 ATE149262 T1 AT E149262T1 AT 91118836 T AT91118836 T AT 91118836T AT 91118836 T AT91118836 T AT 91118836T AT E149262 T1 ATE149262 T1 AT E149262T1
Authority
AT
Austria
Prior art keywords
radio
unit
signalling
alarm system
radio signals
Prior art date
Application number
AT91118836T
Other languages
German (de)
Inventor
Norbert Schaaf
Original Assignee
Diehl Gmbh & Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6417632&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE149262(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Diehl Gmbh & Co filed Critical Diehl Gmbh & Co
Application granted granted Critical
Publication of ATE149262T1 publication Critical patent/ATE149262T1/en

Links

Classifications

    • 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
    • G08B29/16—Security signalling or alarm systems, e.g. redundant 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
    • G08B25/01—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
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/007—Wireless interrogation

Landscapes

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

Abstract

A radio alarm system is described which offers adequate protection against interference due to blocking of the radio paths and against external manipulation. For this purpose, it is proposed that each signalling unit of the alarm system transmits at least two radio signals for an alarm signal, using a different carrier frequency and being coded in identical or different fashion. The central unit accordingly receives with its receivers the at least two radio signals from each signalling unit and checks the affiliation of the signalling units transmitting the radio signals by checking the validity of the coding. It is proposed in addition that an evaluation unit be provided in the receiver unit of the central unit which identifies the field strength of each received radio signal, analyses the associated data telegrams for affiliation to the system of the signalling units transmitting them, if an invalid data telegram is detected, compares the value of the received field strength of the radio signal concerned with a predefinable minimum value and, if this minimum value is exceeded by a predefinable amount, where this amount must be exceeded for a specific time period, triggers a warning indicator. <IMAGE>
AT91118836T 1990-11-05 1991-11-05 RADIO ALARM SYSTEM ATE149262T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4035070A DE4035070A1 (en) 1990-11-05 1990-11-05 RADIO ALARM SYSTEM

Publications (1)

Publication Number Publication Date
ATE149262T1 true ATE149262T1 (en) 1997-03-15

Family

ID=6417632

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91118836T ATE149262T1 (en) 1990-11-05 1991-11-05 RADIO ALARM SYSTEM

Country Status (3)

Country Link
EP (1) EP0484880B1 (en)
AT (1) ATE149262T1 (en)
DE (2) DE4035070A1 (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE213924T1 (en) * 1992-11-09 2002-03-15 Ilife Systems Inc DEVICE AND METHOD FOR REMOTE MEASURING PHYSIOLOGICAL VARIABLES
DE4239702C1 (en) * 1992-11-26 1994-03-24 Grundig Emv Method for monitoring and operating a radio link between the central unit of an alarm system and its outstations containing monitoring sensors
DE4242973C2 (en) * 1992-12-18 1995-01-05 Grundig Emv Radio alarm system with a large number of message channels formed by the code multiplex method
DE4243026C2 (en) * 1992-12-18 1994-10-13 Grundig Emv Radio alarm system with asynchronous transmission of messages via time channels of different periods
WO1994022118A1 (en) * 1993-03-15 1994-09-29 Neighbourlink Limited Security systems
DE4314282C1 (en) * 1993-04-30 1994-06-01 Grundig Emv Radio antitheft alarm, e.g. for home - has optical or electrical sensors to detect fire or break-in and transmits alarm signal via transceiver antennae
FR2708774A1 (en) * 1993-08-05 1995-02-10 Guillo Jean Safety device with bi-directional radio link
DE4425530A1 (en) * 1993-08-19 1995-02-23 Siemens Ag Safety system, in particular for a motor vehicle
DE9312460U1 (en) * 1993-08-19 1994-12-15 Siemens AG, 80333 München Electronic arrangement for monitoring a condition of one or more objects, e.g. one thing and / or person
DE4335815C2 (en) * 1993-10-20 1996-08-08 Hal Sicherheitstechnik Gmbh Wireless alarm system
DE4337211C1 (en) * 1993-10-30 1994-12-15 Grundig Emv Radio alarm system with a radio link between the remote stations and the central unit of an alarm system
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
DE4344172C2 (en) * 1993-12-23 2001-02-22 Grundig Ag Method and arrangement for synchronizing the outdoor units of a radio alarm system with the central unit
DE4408268C2 (en) * 1994-03-11 2000-11-02 Grundig Ag Procedure for increasing the interference immunity of a radio alarm system
DE4417632C2 (en) * 1994-05-19 1998-10-22 Diehl Stiftung & Co Method for operating a radio 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
DE19522113C1 (en) * 1995-06-19 1996-11-14 Klaus O K Dr Kamin System for monitoring and alarming in the event of faults within a monitored area
DE19531081C2 (en) * 1995-08-23 1999-07-15 Oliver Bartels Wireless alarm system
DE19539312A1 (en) 1995-10-23 1997-04-24 Grundig Emv Procedure for increasing the transmission security in radio alarm systems
DE19539989C1 (en) * 1995-10-27 1996-11-28 Grundig Emv Alarm system for houses and other buildings etc.
DE69726793T2 (en) * 1996-05-20 2004-06-17 Honeywell International Inc. Automatic alarm system with monitoring signal analysis
DE19644565A1 (en) * 1996-10-26 1998-04-30 Teves Gmbh Alfred Safety system for moving object esp. vehicle
DE19757235C2 (en) * 1997-12-22 2000-01-05 Honeywell Ag Control system for a building or for one or more rooms in a building
FR2787905A1 (en) * 1998-12-23 2000-06-30 Cedi Securite Surveillance/alarm system asynchronous communications system having master/slave processor module driven transmitter/receivers first channel transmitting interrogation messages and response awaiting before second channel reception.
DE59913632D1 (en) 1999-01-08 2006-08-10 Anatoli Stobbe Security system, transponder and receiving device
US6801137B2 (en) * 2001-04-23 2004-10-05 Cardionet, Inc. Bidirectional communication between a sensor unit and a monitor unit in patient monitoring
US6694177B2 (en) 2001-04-23 2004-02-17 Cardionet, Inc. Control of data transmission between a remote monitoring unit and a central unit
US20050119580A1 (en) 2001-04-23 2005-06-02 Eveland Doug C. Controlling access to a medical monitoring system
US6664893B1 (en) 2001-04-23 2003-12-16 Cardionet, Inc. Method for controlling access to medical monitoring device service
US6665385B2 (en) 2001-04-23 2003-12-16 Cardionet, Inc. Medical monitoring system having multipath communications capability
JP4085990B2 (en) 2004-03-01 2008-05-14 トヨタ自動車株式会社 Vehicle anti-theft system and vehicle anti-theft method
EP1884905A1 (en) * 2006-07-31 2008-02-06 Siemens Building Technologies Fire & Security Products GmbH & Co. oHG Channel management for asynchronous radio communications network
DE102008031923A1 (en) * 2008-07-08 2010-01-14 Hochschule Ostwestfalen-Lippe Procedure for monitoring a room
KR20110117240A (en) * 2009-04-02 2011-10-26 호치키 가부시키가이샤 Wireless disaster prevention node and wireless disaster prevention system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841431B2 (en) * 1978-09-22 1981-04-02 Siemens AG, 1000 Berlin und 8000 München Frequency diversity method
JPS5642448A (en) * 1979-09-14 1981-04-20 Matsushita Electric Works Ltd Radio transmission-reception system
FR2502817A1 (en) * 1981-03-27 1982-10-01 Mere Malleray Et Cie Multiple carrier alarm signal transmitter - requires simultaneous or sequential transmission at different frequencies to initiate remote alarm
US4511887A (en) * 1981-09-14 1985-04-16 Radionics, Inc. Long range wireless alarm monitoring system
US4603325A (en) * 1984-06-05 1986-07-29 Pittway Corporation Evaluation apparatus

Also Published As

Publication number Publication date
EP0484880A2 (en) 1992-05-13
EP0484880B1 (en) 1997-02-26
DE4035070A1 (en) 1992-05-07
EP0484880A3 (en) 1993-08-11
DE59108569D1 (en) 1997-04-03
DE4035070C2 (en) 1993-04-15

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Legal Events

Date Code Title Description
EEFA Change of the company name
EEIH Change in the person of patent owner
EELA Cancelled due to lapse of time