GB2290614A - Intrusion detection apparatus - Google Patents

Intrusion detection apparatus

Info

Publication number
GB2290614A
GB2290614A GB9518644A GB9518644A GB2290614A GB 2290614 A GB2290614 A GB 2290614A GB 9518644 A GB9518644 A GB 9518644A GB 9518644 A GB9518644 A GB 9518644A GB 2290614 A GB2290614 A GB 2290614A
Authority
GB
United Kingdom
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
GB9518644A
Other versions
GB9518644D0 (en
GB2290614B (en
Inventor
Reginald 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.)
Hitek Protek Systems Inc
Original Assignee
Hitek Protek Systems 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 Hitek Protek Systems Inc filed Critical Hitek Protek Systems Inc
Priority claimed from PCT/CA1993/000092 external-priority patent/WO1994020937A1/en
Publication of GB9518644D0 publication Critical patent/GB9518644D0/en
Publication of GB2290614A publication Critical patent/GB2290614A/en
Application granted granted Critical
Publication of GB2290614B publication Critical patent/GB2290614B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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. <IMAGE>
GB9518644A 1993-03-10 1993-03-10 Intrusion detection apparatus Expired - Fee Related GB2290614B (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 (3)

Publication Number Publication Date
GB9518644D0 GB9518644D0 (en) 1995-11-15
GB2290614A true GB2290614A (en) 1996-01-03
GB2290614B GB2290614B (en) 1997-01-22

Family

ID=4172966

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9518644A Expired - Fee Related GB2290614B (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
GB2319842A (en) * 1996-11-28 1998-06-03 Valeo Electronique Vehicle intruder alarm

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20052403A (en) * 2005-05-18 2006-09-18 Idtec Pte Ltd System and procedure for burglary detection
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016545A1 (en) * 1979-02-23 1980-10-01 Gec-Marconi Limited Intruder alarm system responsive to vibration
US4306228A (en) * 1979-01-08 1981-12-15 Licentia Patent-Verwaltungs-G.M.B.H. Security alarm system monitoring difference between sound signal components in two frequency ranges
FR2569027A1 (en) * 1984-03-28 1986-02-14 Vg Electronique Electro Guglie Infrasound perimeter detection system, infrasound processing
US4853677A (en) * 1988-07-20 1989-08-01 Yarbrough Alfred E Portable intrusion alarm
EP0448290A2 (en) * 1990-03-14 1991-09-25 Geoquip Limited Intrusion detection system and signal processing circuitry therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306228A (en) * 1979-01-08 1981-12-15 Licentia Patent-Verwaltungs-G.M.B.H. Security alarm system monitoring difference between sound signal components in two frequency ranges
EP0016545A1 (en) * 1979-02-23 1980-10-01 Gec-Marconi Limited Intruder alarm system responsive to vibration
FR2569027A1 (en) * 1984-03-28 1986-02-14 Vg Electronique Electro Guglie Infrasound perimeter detection system, infrasound processing
US4853677A (en) * 1988-07-20 1989-08-01 Yarbrough Alfred E Portable intrusion alarm
EP0448290A2 (en) * 1990-03-14 1991-09-25 Geoquip Limited 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
GB2319842A (en) * 1996-11-28 1998-06-03 Valeo Electronique Vehicle intruder alarm
GB2319842B (en) * 1996-11-28 2001-03-21 Valeo Electronique Method and device for detecting intrusion into a motor vehicle

Also Published As

Publication number Publication date
CA2157894A1 (en) 1994-09-15
CA2157894C (en) 2001-05-22
GB9518644D0 (en) 1995-11-15
GB2290614B (en) 1997-01-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030310