CA2157894A1 - Intrusion detection apparatus - Google Patents

Intrusion detection apparatus

Info

Publication number
CA2157894A1
CA2157894A1 CA002157894A CA2157894A CA2157894A1 CA 2157894 A1 CA2157894 A1 CA 2157894A1 CA 002157894 A CA002157894 A CA 002157894A CA 2157894 A CA2157894 A CA 2157894A CA 2157894 A1 CA2157894 A1 CA 2157894A1
Authority
CA
Canada
Prior art keywords
signal
logic circuit
threshold
affirmative
amplitude
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
CA002157894A
Other languages
French (fr)
Other versions
CA2157894C (en
Inventor
Reginald J. Kerr
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.)
ALPHA ZAICON TECHNOLOGY Inc
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 claimed from PCT/CA1993/000092 external-priority patent/WO1994020937A1/en
Publication of CA2157894A1 publication Critical patent/CA2157894A1/en
Application granted granted Critical
Publication of CA2157894C publication Critical patent/CA2157894C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • 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

Landscapes

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

Abstract

Intrusion detection apparatus for use in perimeter security systems and the like is provided with multiple channel signal processing.
Each signal processor includes a bandpass filter whose passband is selectable. Each is respectively responsive to sensed movement including vibrations within the associated selected passband. An output affirmative signal is generated if the amplitude of the input signal constituent within the associated frequency range exceeds a threshold level for a predetermined period of time. A logic circuit receives the outputs of all of the signal processors and provides an output alarm signal when a predetermined combination of affirmative signals is received from the signal processors. Such logic circuit preferably works with digital signals obtained by analog-to-digital conversion. A threshold bias adjustment may be provided for adjusting the threshold amplitude of at least one input signal so that ambient noise may be taken into consideration by the logic circuit.
CA002157894A 1993-03-10 1993-03-10 Intrusion detection apparatus Expired - Lifetime CA2157894C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA1993/000092 WO1994020937A1 (en) 1991-09-09 1993-03-10 Intrusion detection apparatus

Publications (2)

Publication Number Publication Date
CA2157894A1 true CA2157894A1 (en) 1994-09-15
CA2157894C CA2157894C (en) 2001-05-22

Family

ID=4172966

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002157894A Expired - Lifetime CA2157894C (en) 1993-03-10 1993-03-10 Intrusion detection apparatus

Country Status (2)

Country Link
CA (1) CA2157894C (en)
GB (1) GB2290614B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1883910A1 (en) * 2005-05-18 2008-02-06 Idteq As System and method for intrusion detection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756401B1 (en) * 1996-11-28 1999-02-19 Valeo Electronique METHOD AND DEVICE FOR DETECTING INTRUSION IN A MOTOR VEHICLE
RU2570230C1 (en) * 2014-09-24 2015-12-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Пензенский государственный университет" (ФГБОУ ВПО ПГУ) Device for detecting moving ground objects from seismic signal with standard false triggering probability

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2900444A1 (en) * 1979-01-08 1980-07-10 Licentia Gmbh METHOD AND CIRCUIT ARRANGEMENT FOR EVALUATING OUTPUT SIGNALS FROM SOUND RECEIVERS OF AN OBJECT PROTECTION MONITORING SYSTEM AND FOR GENERATING AN ALARM SIGNAL
US4307387A (en) * 1979-02-23 1981-12-22 Elliott Brothers (London) Limited Vibration-responsive intruder alarm system
FR2569027B1 (en) * 1984-03-28 1986-12-05 Vg Electronique Electro Guglie PERIMETRIC INFRASON DETECTION METHOD, INFRASON TREATMENT
US4853677A (en) * 1988-07-20 1989-08-01 Yarbrough Alfred E Portable intrusion alarm
GB9005751D0 (en) * 1990-03-14 1990-05-09 Geoquip Ltd Intrusion detection system and signal processing circuitry therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1883910A1 (en) * 2005-05-18 2008-02-06 Idteq As System and method for intrusion detection
EP1883910A4 (en) * 2005-05-18 2010-05-12 Idteq As System and method for intrusion detection

Also Published As

Publication number Publication date
CA2157894C (en) 2001-05-22
GB2290614A (en) 1996-01-03
GB2290614B (en) 1997-01-22
GB9518644D0 (en) 1995-11-15

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Legal Events

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