FR2441228A1 - Automatic monitoring of state of alarms - includes circuit simulating alarm and addressed from monitoring control unit, supplied with addressed information drawn from register - Google Patents

Automatic monitoring of state of alarms - includes circuit simulating alarm and addressed from monitoring control unit, supplied with addressed information drawn from register

Info

Publication number
FR2441228A1
FR2441228A1 FR7831523A FR7831523A FR2441228A1 FR 2441228 A1 FR2441228 A1 FR 2441228A1 FR 7831523 A FR7831523 A FR 7831523A FR 7831523 A FR7831523 A FR 7831523A FR 2441228 A1 FR2441228 A1 FR 2441228A1
Authority
FR
France
Prior art keywords
register
addressed
control unit
alarm
state
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.)
Granted
Application number
FR7831523A
Other languages
French (fr)
Other versions
FR2441228B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7831523A priority Critical patent/FR2441228A1/en
Publication of FR2441228A1 publication Critical patent/FR2441228A1/en
Application granted granted Critical
Publication of FR2441228B1 publication Critical patent/FR2441228B1/fr
Granted legal-status Critical Current

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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
    • G08B29/188—Data fusion; cooperative systems, e.g. voting among different detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)

Abstract

The automatic monitoring system is for the state of alarm from a number of detectors and is protected against faults by use of a supplementary element. This simulates the alarm and the actual detector condition is used after its activation. A control unit located in a central monitoring unit selects one of a group of detectors. This is selected by loading a register with the address and information necessary to control a supplementary verification element. Data in the register modules a current in a modulator which flows via a matching unit and data bus to a demodulator. The data is compared for coincidence to activate a decoder to open a respective gate. This allows the detector signal to be processed and modulated to be transmitted to the control unit via a register. A second sequence generates the signal to activate the verification element.
FR7831523A 1978-11-08 1978-11-08 Automatic monitoring of state of alarms - includes circuit simulating alarm and addressed from monitoring control unit, supplied with addressed information drawn from register Granted FR2441228A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7831523A FR2441228A1 (en) 1978-11-08 1978-11-08 Automatic monitoring of state of alarms - includes circuit simulating alarm and addressed from monitoring control unit, supplied with addressed information drawn from register

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7831523A FR2441228A1 (en) 1978-11-08 1978-11-08 Automatic monitoring of state of alarms - includes circuit simulating alarm and addressed from monitoring control unit, supplied with addressed information drawn from register

Publications (2)

Publication Number Publication Date
FR2441228A1 true FR2441228A1 (en) 1980-06-06
FR2441228B1 FR2441228B1 (en) 1982-05-14

Family

ID=9214592

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7831523A Granted FR2441228A1 (en) 1978-11-08 1978-11-08 Automatic monitoring of state of alarms - includes circuit simulating alarm and addressed from monitoring control unit, supplied with addressed information drawn from register

Country Status (1)

Country Link
FR (1) FR2441228A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509537A (en) * 1966-10-31 1970-04-28 Univ Iowa State Res Found Inc Digital communication apparatus for a power distribution line
US3803594A (en) * 1972-07-17 1974-04-09 Johnson Service Co Programmed time division multiplexed coded tone transmission system
US3815093A (en) * 1973-05-11 1974-06-04 Afa Syst Inc Signaling system utilizing frequency burst duration and absence for control functions
US3886534A (en) * 1973-01-08 1975-05-27 Polar Corp Security system
US3983548A (en) * 1975-02-19 1976-09-28 Tufts Howard L Fire detection system
US4044351A (en) * 1974-06-24 1977-08-23 Walter Kidde & Company, Inc. System monitor with innate line security ability

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509537A (en) * 1966-10-31 1970-04-28 Univ Iowa State Res Found Inc Digital communication apparatus for a power distribution line
US3803594A (en) * 1972-07-17 1974-04-09 Johnson Service Co Programmed time division multiplexed coded tone transmission system
US3886534A (en) * 1973-01-08 1975-05-27 Polar Corp Security system
US3815093A (en) * 1973-05-11 1974-06-04 Afa Syst Inc Signaling system utilizing frequency burst duration and absence for control functions
US4044351A (en) * 1974-06-24 1977-08-23 Walter Kidde & Company, Inc. System monitor with innate line security ability
US3983548A (en) * 1975-02-19 1976-09-28 Tufts Howard L Fire detection system

Also Published As

Publication number Publication date
FR2441228B1 (en) 1982-05-14

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Legal Events

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ST Notification of lapse