GB201213708D0 - Intruder alarm system - Google Patents

Intruder alarm system

Info

Publication number
GB201213708D0
GB201213708D0 GB201213708A GB201213708A GB201213708D0 GB 201213708 D0 GB201213708 D0 GB 201213708D0 GB 201213708 A GB201213708 A GB 201213708A GB 201213708 A GB201213708 A GB 201213708A GB 201213708 D0 GB201213708 D0 GB 201213708D0
Authority
GB
United Kingdom
Prior art keywords
sensors
sensor
alarm system
housing
intruder
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Withdrawn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
GB201213708A
Other versions
GB2504523A (en
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.)
Fenner Martin J H
Original Assignee
Fenner Martin J H
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 Fenner Martin J H filed Critical Fenner Martin J H
Priority to GB201213708A priority Critical patent/GB2504523A/en
Publication of GB201213708D0 publication Critical patent/GB201213708D0/en
Publication of GB2504523A publication Critical patent/GB2504523A/en
Withdrawn legal-status Critical Current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

Abstract

An intruder alarm system comprises a first housing 2a containing a first sensor 4a, and a second housing 2b containing a second sensor 4b. A control circuit 10 receives signals from the first and second sensors 4a,4b and determines an alarm condition only when both sensors detect an intrusion within a predetermined time interval. The respective sensors 4a,4b can be installed in locations that are spaced apart, while monitoring a single zone 6. Thereby both the sensors 4a,4b will respond to an intruder entering the zone but they will respond differently to environmental factors such as flying birds that are local to just one of the sensors so that false alarm conditions can be distinguished and ignored. The sensors may comprise at least one passive infra-red sensor and at least one Doppler microwave sensor.
GB201213708A 2012-08-01 2012-08-01 Intruder alarm system incorporating at least one passive infrared sensor and at least one microwave sensor Withdrawn GB2504523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201213708A GB2504523A (en) 2012-08-01 2012-08-01 Intruder alarm system incorporating at least one passive infrared sensor and at least one microwave sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201213708A GB2504523A (en) 2012-08-01 2012-08-01 Intruder alarm system incorporating at least one passive infrared sensor and at least one microwave sensor

Publications (2)

Publication Number Publication Date
GB201213708D0 true GB201213708D0 (en) 2012-09-12
GB2504523A GB2504523A (en) 2014-02-05

Family

ID=46881517

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201213708A Withdrawn GB2504523A (en) 2012-08-01 2012-08-01 Intruder alarm system incorporating at least one passive infrared sensor and at least one microwave sensor

Country Status (1)

Country Link
GB (1) GB2504523A (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660024A (en) * 1985-12-16 1987-04-21 Detection Systems Inc. Dual technology intruder detection system
US5216410A (en) * 1990-11-16 1993-06-01 Digital Security Controls Ltd. Intrusion alarm sensing unit
US5276427A (en) * 1991-07-08 1994-01-04 Digital Security Controls Ltd. Auto-adjust motion detection system
CA2113026A1 (en) * 1993-01-28 1994-07-29 Paul Michael Hoseit Methods and apparatus for intrusion detection having improved immunity to false alarms
US5473311A (en) * 1994-09-16 1995-12-05 C&K Systems, Inc. Method and apparatus to distinguish human intruder and animal intruder
US6188318B1 (en) * 1999-06-29 2001-02-13 Pittway Corp. Dual-technology intrusion detector with pet immunity
ITMI20011043A1 (en) * 2001-05-18 2002-11-18 Beghelli Spa ANTI-INTRUSION DEVICE
JP4250697B2 (en) * 2003-09-04 2009-04-08 オプテックス株式会社 Combination sensor
US7034675B2 (en) * 2004-04-16 2006-04-25 Robert Bosch Gmbh Intrusion detection system including over-under passive infrared optics and a microwave transceiver
US7262697B2 (en) * 2005-01-07 2007-08-28 Robert Bosch Gmbh Dual sensing intrusion detection method and system with state-level fusion

Also Published As

Publication number Publication date
GB2504523A (en) 2014-02-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)