ATE39774T1 - DIFFERENTIAL PRESSURE ACCESS DETECTOR. - Google Patents

DIFFERENTIAL PRESSURE ACCESS DETECTOR.

Info

Publication number
ATE39774T1
ATE39774T1 AT85400411T AT85400411T ATE39774T1 AT E39774 T1 ATE39774 T1 AT E39774T1 AT 85400411 T AT85400411 T AT 85400411T AT 85400411 T AT85400411 T AT 85400411T AT E39774 T1 ATE39774 T1 AT E39774T1
Authority
AT
Austria
Prior art keywords
detector
differential pressure
parallel
followed
signal
Prior art date
Application number
AT85400411T
Other languages
German (de)
Inventor
Jean Isidore Marie C O Guillo
Jacques Gaston Rene C O S Bley
Original Assignee
Sogesec
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 Sogesec filed Critical Sogesec
Application granted granted Critical
Publication of ATE39774T1 publication Critical patent/ATE39774T1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves
    • 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
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1. Differential pressure access detector of the type including a pressure sensor associated with an amplification filter with quick out-off frequencies intended for eliminating the interference frequency acoustic signals, characterized in that the logic means used for processing the signal is a wired logic including a + and - alternation detector (5), by the output of which a counting device (9) is parallel fed, a duration integration means (10) followed by a comparator (11), and a retarder (12), said alternation detector (5) receiving the signal to be processed in parallel with an energy integrator (6) which it controls and which is followed by an adjustable threshold comparator (7), the output of which as well as the outputs of the parallel elements (9), (10) and (12) end in a decision means (8).
AT85400411T 1984-03-05 1985-03-04 DIFFERENTIAL PRESSURE ACCESS DETECTOR. ATE39774T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8403501A FR2560701B1 (en) 1984-03-05 1984-03-05 DIFFERENTIAL PRESSURE ACCESS DETECTOR
EP85400411A EP0159218B1 (en) 1984-03-05 1985-03-04 Differential pressure access detector

Publications (1)

Publication Number Publication Date
ATE39774T1 true ATE39774T1 (en) 1989-01-15

Family

ID=9301779

Family Applications (1)

Application Number Title Priority Date Filing Date
AT85400411T ATE39774T1 (en) 1984-03-05 1985-03-04 DIFFERENTIAL PRESSURE ACCESS DETECTOR.

Country Status (4)

Country Link
EP (1) EP0159218B1 (en)
AT (1) ATE39774T1 (en)
DE (1) DE3567298D1 (en)
FR (1) FR2560701B1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588108A1 (en) * 1985-09-27 1987-04-03 Durand Michel Active perimeter break-in detector
DE3579461D1 (en) * 1985-10-14 1990-10-04 Microprotector Ltd DETECTOR AND ALARM SYSTEM.
FR2589609B1 (en) * 1985-10-31 1988-09-09 Frere Emmanuel ALARM DEVICE, PARTICULARLY FOR SURVEILLANCE OF PREMISES
FR2596179A1 (en) * 1986-03-18 1987-09-25 Smcm Intruder detection system, applicable especially to an alarm system
US4991145A (en) * 1988-08-03 1991-02-05 Rabbit Systems, Inc. Infra-sonic detector and alarm with self adjusting reference
GB2231660A (en) * 1989-03-02 1990-11-21 David Mainprize Detecting entry into an enclosed space from air pressure changes
GB2234068A (en) * 1989-03-13 1991-01-23 * Mistry Chand Infra-sonic detectors for use in alarm systems
FR2694650A1 (en) * 1992-08-04 1994-02-11 Frizet Christian Parametric analyser for intruder detector using pressure sensor - includes microprocessor for memorising and comparing signals in order to set detection thresholds and sense abnormal signals
EP0726548B1 (en) * 1995-02-13 2004-07-21 Siemens Building Technologies AG Sonic detector for monitoring intrusions
FR2770670A1 (en) * 1997-11-03 1999-05-07 Omega Conception Et Systeme Sound detector alarm
FR2809215B1 (en) * 2000-05-18 2004-09-10 F And F Internat SELF-REGULATED ALARM DEVICE WITH VERY LOW ENERGY CONSUMPTION
US6720875B2 (en) 2000-05-18 2004-04-13 F And F International S.A.R.L. Self-adjusting alarm device with low energy consumption

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1218717A (en) * 1969-05-15 1971-01-13 Sonus Corp Sonic switch
NL7208873A (en) * 1972-06-28 1974-01-02
US4383250A (en) * 1981-03-09 1983-05-10 American District Telegraph Company System for intrusion detection
US4415979A (en) * 1981-03-25 1983-11-15 Ensco, Inc. Method and apparatus for detecting the presence of an animate body in an inanimate mobile structure

Also Published As

Publication number Publication date
FR2560701A1 (en) 1985-09-06
DE3567298D1 (en) 1989-02-09
FR2560701B1 (en) 1987-04-17
EP0159218B1 (en) 1989-01-04
EP0159218A1 (en) 1985-10-23

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