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FR2469721A1 - INTRUSION DETECTOR - Google Patents

INTRUSION DETECTOR

Info

Publication number
FR2469721A1
FR2469721A1 FR8023937A FR8023937A FR2469721A1 FR 2469721 A1 FR2469721 A1 FR 2469721A1 FR 8023937 A FR8023937 A FR 8023937A FR 8023937 A FR8023937 A FR 8023937A FR 2469721 A1 FR2469721 A1 FR 2469721A1
Authority
FR
France
Prior art keywords
wire
tube
intrusion detection
insensitivity
electrically conductive
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.)
Withdrawn
Application number
FR8023937A
Other languages
French (fr)
Inventor
Leigh R Wold
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Publication of FR2469721A1 publication Critical patent/FR2469721A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • 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
    • G08B13/169—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using cable transducer means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

DETECTEUR PERFECTIONNE UTILISABLE AVEC UN CIRCUIT DE DETECTION D'INTRUSION. LE DETECTEUR COMPREND UN TUBE 10 CREUX ET ELECTRIQUEMENT CONDUCTEUR, DE LONGUEUR ASSEZ GRANDE, ET AU MOINS DEUX FILS 12 ET 14 ELECTRIQUEMENT CONDUCTEURS, DISPOSES DE FACON LACHE A L'INTERIEUR DU TUBE SUR TOUTE SA LONGUEUR. CHAQUE FIL COMPORTE DES ZONES ALTERNEES DE SENSIBILITE ET D'INSENSIBILITE ELECTRIQUE TELLES QU'UNE ZONE DE SENSIBILITE D'UN FIL SOIT PLACEE EN REGARD D'UNE ZONE D'INSENSIBILITE DE L'AUTRE FIL. DES CONNECTEURS 19 ET 20 RELIENT ELECTRIQUEMENT CHAQUE FIL AU TUBE. LA DETECTION D'INTRUSION EST EFFECTUEE PAR DES SIGNAUX ELECTRIQUES QUI SONT ENGENDRES PAR VIBRATION DES FILS DANS LE TUBE. APPLICATION AUX SYSTEMES DE DETECTION D'INTRUSION DU TYPE ENTERRE.ADVANCED DETECTOR FOR USE WITH AN INTRUSION DETECTION CIRCUIT. THE DETECTOR CONSISTS OF A 10 HOLLOW AND ELECTRICALLY CONDUCTIVE TUBE, OF LARGE LENGTH, AND AT LEAST TWO 12 AND 14 ELECTRICALLY CONDUCTIVE WIRES, ARRANGED LOOSE INSIDE THE TUBE THROUGHOUT ITS LENGTH. EACH WIRE CONTAINS ALTERNATE ZONES OF ELECTRICAL SENSITIVITY AND INSENSITIVITY SUCH AS A SENSITIVITY ZONE OF ONE WIRE IS PLACED AGAINST A ZONE OF INSENSITIVITY OF THE OTHER WIRE. CONNECTORS 19 AND 20 ELECTRICALLY CONNECT EACH WIRE TO THE TUBE. THE INTRUSION DETECTION IS CARRIED OUT BY ELECTRIC SIGNALS WHICH ARE GENERATED BY VIBRATION OF THE WIRES IN THE TUBE. APPLICATION TO BURIOR TYPE INTRUSION DETECTION SYSTEMS.

FR8023937A 1979-11-13 1980-11-07 INTRUSION DETECTOR Withdrawn FR2469721A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9365379A 1979-11-13 1979-11-13

Publications (1)

Publication Number Publication Date
FR2469721A1 true FR2469721A1 (en) 1981-05-22

Family

ID=22240062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8023937A Withdrawn FR2469721A1 (en) 1979-11-13 1980-11-07 INTRUSION DETECTOR

Country Status (5)

Country Link
BE (1) BE886110A (en)
DE (1) DE3042358A1 (en)
FR (1) FR2469721A1 (en)
GB (1) GB2063537A (en)
SE (1) SE8007903L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206458B1 (en) * 1985-04-17 1992-07-01 Geoquip Security Systems Limited Vibration-sensitive transducer
GB2182182B (en) * 1985-04-24 1989-06-28 Sound Special Services Limited Intrusion detecting device

Also Published As

Publication number Publication date
DE3042358A1 (en) 1981-05-14
GB2063537A (en) 1981-06-03
SE8007903L (en) 1981-05-14
BE886110A (en) 1981-03-02

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Legal Events

Date Code Title Description
RE Withdrawal of published application