ATE149262T1 - RADIO ALARM SYSTEM - Google Patents
RADIO ALARM SYSTEMInfo
- 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
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 Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (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>
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2170090T3 (en) * | 1992-11-09 | 2002-08-01 | Ilife Systems Inc | APPARATUS AND PROCEDURE FOR REMOTE MONITORING OF PHYSIOLOGICAL PARAMETERS. |
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 | 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 |
US20050119580A1 (en) | 2001-04-23 | 2005-06-02 | Eveland Doug C. | Controlling access to a medical monitoring system |
US6694177B2 (en) | 2001-04-23 | 2004-02-17 | Cardionet, Inc. | Control of data transmission between a remote monitoring unit and a central unit |
US6665385B2 (en) | 2001-04-23 | 2003-12-16 | Cardionet, Inc. | Medical monitoring system having multipath communications capability |
US6664893B1 (en) | 2001-04-23 | 2003-12-16 | Cardionet, Inc. | Method for controlling access to medical monitoring device service |
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 |
EP2416300A4 (en) * | 2009-04-02 | 2013-07-17 | Hochiki Co | Wireless disasters-preventing node and wireless disasters-preventing system |
Family Cites Families (5)
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 |
-
1990
- 1990-11-05 DE DE4035070A patent/DE4035070A1/en active Granted
-
1991
- 1991-11-05 EP EP91118836A patent/EP0484880B1/en not_active Expired - Lifetime
- 1991-11-05 DE DE59108569T patent/DE59108569D1/en not_active Expired - Lifetime
- 1991-11-05 AT AT91118836T patent/ATE149262T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE59108569D1 (en) | 1997-04-03 |
EP0484880A3 (en) | 1993-08-11 |
EP0484880A2 (en) | 1992-05-13 |
DE4035070A1 (en) | 1992-05-07 |
DE4035070C2 (en) | 1993-04-15 |
EP0484880B1 (en) | 1997-02-26 |
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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 |