ATE87385T1 - SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION. - Google Patents

SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION.

Info

Publication number
ATE87385T1
ATE87385T1 AT89402891T AT89402891T ATE87385T1 AT E87385 T1 ATE87385 T1 AT E87385T1 AT 89402891 T AT89402891 T AT 89402891T AT 89402891 T AT89402891 T AT 89402891T AT E87385 T1 ATE87385 T1 AT E87385T1
Authority
AT
Austria
Prior art keywords
alarm
security system
electrical transmission
signals
radio electrical
Prior art date
Application number
AT89402891T
Other languages
German (de)
Inventor
Jacques Duboys
Gerard Akenine
Original Assignee
Cerberus Guinard
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 Cerberus Guinard filed Critical Cerberus Guinard
Application granted granted Critical
Publication of ATE87385T1 publication Critical patent/ATE87385T1/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

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)
  • Transceivers (AREA)
  • Fire Alarms (AREA)
  • Helmets And Other Head Coverings (AREA)

Abstract

The proposed device consists in that, each transmitter (1) associated with an alarm detection device (2) comprises two devices (3) and (4) for transmitting the alarm signal in such a way as to transmit two alarm signals which are identical but separated in time by a certain period. On reception, an alarm is recognised not only when both signals are received, but also when a single signal is received. The coding of the two transmission devices into the alarm signals permits determination of the transmission device (3) or (4) which is defective. The proposed device is applicable to security systems. <IMAGE>
AT89402891T 1988-10-25 1989-10-19 SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION. ATE87385T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8813920A FR2638267B1 (en) 1988-10-25 1988-10-25 SAFETY SYSTEM WITH RADIOELECTRIC TRANSMISSION
EP89402891A EP0366527B1 (en) 1988-10-25 1989-10-19 Security system with radioelectric transmission

Publications (1)

Publication Number Publication Date
ATE87385T1 true ATE87385T1 (en) 1993-04-15

Family

ID=9371248

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89402891T ATE87385T1 (en) 1988-10-25 1989-10-19 SECURITY SYSTEM WITH RADIO ELECTRICAL TRANSMISSION.

Country Status (4)

Country Link
EP (1) EP0366527B1 (en)
AT (1) ATE87385T1 (en)
DE (1) DE68905567T2 (en)
FR (1) FR2638267B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848231A (en) * 1970-12-31 1974-11-12 Baldwin Electronics Inc Alarm system utilizing pulse position modulation and dual conductor sensor
US3909722A (en) * 1973-06-22 1975-09-30 Jbh Electronic Systems Inc Variable frequency communication system
US4575712A (en) * 1984-02-27 1986-03-11 Pittway Corporation Communication system
US4665385A (en) * 1985-02-05 1987-05-12 Henderson Claude L Hazardous condition monitoring system

Also Published As

Publication number Publication date
FR2638267B1 (en) 1990-12-21
FR2638267A1 (en) 1990-04-27
EP0366527B1 (en) 1993-03-24
EP0366527A1 (en) 1990-05-02
DE68905567D1 (en) 1993-04-29
DE68905567T2 (en) 1993-08-26

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