FR2402908A1 - Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device - Google Patents

Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device

Info

Publication number
FR2402908A1
FR2402908A1 FR7727597A FR7727597A FR2402908A1 FR 2402908 A1 FR2402908 A1 FR 2402908A1 FR 7727597 A FR7727597 A FR 7727597A FR 7727597 A FR7727597 A FR 7727597A FR 2402908 A1 FR2402908 A1 FR 2402908A1
Authority
FR
France
Prior art keywords
surveillance
devices
supply via
hyperfrequency
ultrasonic
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
FR7727597A
Other languages
French (fr)
Other versions
FR2402908B1 (en
Inventor
Tristan Penet
Andre Richard
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.)
Cegelec SA
Original Assignee
Cegelec SA
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 Cegelec SA filed Critical Cegelec SA
Priority to FR7727597A priority Critical patent/FR2402908A1/en
Publication of FR2402908A1 publication Critical patent/FR2402908A1/en
Application granted granted Critical
Publication of FR2402908B1 publication Critical patent/FR2402908B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1645—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means and other detection means, e.g. microwave or infrared radiation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
    • G08B13/2494—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field by interference with electro-magnetic field distribution combined with other electrical sensor means, e.g. microwave detectors combined with other sensor means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The surveillance system uses at least two surveillance devices, each covering the whole of the surveillance zone or all the possible exits for the latter, the two devices monitoring different physical parameters. The surveillance devices are coupled to a coincidence circuit (18) for activating the alarm only if all the devices are activated for a short time period. One of the surveillance devices is coupled to the supply via a switch (30) controlled by a further device. The first surveillance device is only connected to the supply when the second surveillance device is energised. Pref. the surveillance system uses ultrasonic (2, 4, 6, 8) and hyperfrequency (10, 12, 14, 16) surveillance devices.
FR7727597A 1977-09-13 1977-09-13 Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device Granted FR2402908A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7727597A FR2402908A1 (en) 1977-09-13 1977-09-13 Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7727597A FR2402908A1 (en) 1977-09-13 1977-09-13 Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device

Publications (2)

Publication Number Publication Date
FR2402908A1 true FR2402908A1 (en) 1979-04-06
FR2402908B1 FR2402908B1 (en) 1982-02-19

Family

ID=9195325

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7727597A Granted FR2402908A1 (en) 1977-09-13 1977-09-13 Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device

Country Status (1)

Country Link
FR (1) FR2402908A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611957A1 (en) * 1987-03-04 1988-09-09 Dreuilhe Jacqueline Dual-volumetric DOPPLER-effect movement-detecting radar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611957A1 (en) * 1987-03-04 1988-09-09 Dreuilhe Jacqueline Dual-volumetric DOPPLER-effect movement-detecting radar

Also Published As

Publication number Publication date
FR2402908B1 (en) 1982-02-19

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Legal Events

Date Code Title Description
ST Notification of lapse