GB1466518A - Intrusion detector self-test system - Google Patents

Intrusion detector self-test system

Info

Publication number
GB1466518A
GB1466518A GB4370175A GB4370175A GB1466518A GB 1466518 A GB1466518 A GB 1466518A GB 4370175 A GB4370175 A GB 4370175A GB 4370175 A GB4370175 A GB 4370175A GB 1466518 A GB1466518 A GB 1466518A
Authority
GB
United Kingdom
Prior art keywords
output
signal
gate
intrusion
alarm
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.)
Expired
Application number
GB4370175A
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.)
Energy Research and Development Administration ERDA
Original Assignee
Energy Research and Development Administration ERDA
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 Energy Research and Development Administration ERDA filed Critical Energy Research and Development Administration ERDA
Publication of GB1466518A publication Critical patent/GB1466518A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • 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
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/123—Checking intermittently signalling or alarm systems of line circuits
    • 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
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S250/00—Radiant energy
    • Y10S250/01—Passive intrusion detectors

Landscapes

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

Abstract

1466518 Intruder alarm systems UNITED STATES ENERGY RESEARCH & DEVELOPMENT ADMINISTRATION 24 Oct 1975 [17 Dec 1974] 43701/75 Heading G4N An intrusion alarm system comprises means 12 for providing an output signal E having a first of two states under normal circuit operation, non-intrusion conditions, and the second state in response to activation of a detector 20 under normal circuit operation, clock operated means 22 for periodically providing a first signal for causing simulation of an intrusion, a second signal A for overriding the output E in its second state, and a third signal A<SP>1</SP>, a first gate 60 receiving the output signal E and the signal A<SP>1</SP> for providing an output G having a first state in response to either a normal condition, an intrusion or a simulated intrusion, and a second state in response to a malfunction, and a second gate 15 receiving the signals G, E and A for providing an output having a first state in response to either a normal condition or a simulated instrusion condition with normal circuit operation, and a second state in response to an actual intrusion or a simulated intrusion coupled with a malfunction. As shown and described, the detector 20 is a pyroelectric detector which responds to infrared from an intruder to provide the signal B shown in Fig. 2. The output of detector 20 is processed as shown to provide an output E which is normally high but is low in response to an intrusion. Under normal operation, the NAND gate 15 responds to the low E and high G to provide a high output F for actuating an alarm. The clock operated means 22 periodically provides a high signal A which is applied via a capacitor 51 to a LED 52 which simulates an intruder, and to the input of NAND gate 15 to override the simulated low output E, and to delay and integrating units 57, 58 to provide the short high signal A<SP>1</SP>. With the system functioning correctly, the output G remains high as does the other input to the gate 15 during the signal A and thus the output of gate 15 is low and the alarm is not actuated. However, if the output E remains high due to malfunction during the signal A, the output G switches low for the duration of the signal A<SP>1</SP> and thus the output of gate 15 switches high for this duration to actuate the alarm. A redundancy path including a NOR gate 70 is also provided, the NOR gate providing a high output when both its inputs are low to actuate the alarm. Should the self check signal A remain at its high level due to malfunction, thereby preventing gate 15 from functioning, upon detection of an intrusion the gate 70 responds to actuate the alarm.
GB4370175A 1974-12-17 1975-10-24 Intrusion detector self-test system Expired GB1466518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US533741A US3928849A (en) 1974-12-17 1974-12-17 Intrusion detector self-test system

Publications (1)

Publication Number Publication Date
GB1466518A true GB1466518A (en) 1977-03-09

Family

ID=24127265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4370175A Expired GB1466518A (en) 1974-12-17 1975-10-24 Intrusion detector self-test system

Country Status (5)

Country Link
US (1) US3928849A (en)
JP (1) JPS5185698A (en)
DE (1) DE2556864A1 (en)
FR (1) FR2295505A1 (en)
GB (1) GB1466518A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2255409A (en) * 1991-05-02 1992-11-04 C & K Systems Inc Audio intrusion detection system
WO1993018492A1 (en) * 1992-03-09 1993-09-16 The Commonwealth Of Australia Infrared intrusion sensor
GB2240626B (en) * 1990-01-31 1993-09-29 Servo Corp Of America Integrity test for acoustic bearing defect detector

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US4063085A (en) * 1975-11-03 1977-12-13 Cometa S. A. Method of and apparatus for electronic scanning
CH599642A5 (en) * 1976-11-15 1978-05-31 Cerberus Ag
FR2432189A1 (en) * 1978-07-24 1980-02-22 Faget Jean Electronic surveillance alarm system with automatic checking - employs detectors in bridge network receiving periodic control pulses from generator
IT1161307B (en) * 1978-08-25 1987-03-18 Datalogic Spa PHOTOELECTRIC BARRIER IN PARTICULAR SAFETY DEVICE
US4266219A (en) * 1978-09-18 1981-05-05 Baker Industries, Inc. Supervisory control system for a smoke detector
US4468657A (en) * 1979-09-10 1984-08-28 Rossin John A Simplified intruder detector
US4364030A (en) * 1979-09-10 1982-12-14 Rossin John A Intruder detection system
US4468658A (en) * 1979-09-10 1984-08-28 Rossin John A Simplified intruder detection module
US4342987A (en) * 1979-09-10 1982-08-03 Rossin Corporation Intruder detection system
US4275303A (en) * 1979-11-13 1981-06-23 Arrowhead Enterprises, Inc. Passive infrared intrusion detection system
USRE32828E (en) * 1979-11-13 1989-01-10 Cerberus A.G. Passive infrared intrusion detection system
FR2485774A1 (en) * 1980-06-26 1981-12-31 Cuggia Christiane Magnetic reed switch position detector e.g. for safe door - has test coil which acts against contact element to provide periodic testing of response of switch
JPS5784088U (en) * 1980-10-31 1982-05-24
FR2520123A1 (en) * 1982-01-15 1983-07-22 Thomson Csf Automatic test equipment for opto-electronic system - has light generator and fibre=optic transmission of light onto photodetector
US4542489A (en) * 1982-05-18 1985-09-17 Aisin Seiki Kabushiki Kaisha Object detecting system of reflection type
US4523184A (en) * 1982-09-30 1985-06-11 Sentrol, Inc. Supervised wireless security system
FR2539534A1 (en) * 1983-01-17 1984-07-20 Alsthom Cgee Test arrangement for detecting the breaking of glass
IT1169168B (en) * 1983-02-15 1987-05-27 Gd Spa FUNCTIONAL CONTROL SYSTEM FOR INPUT TRANSDUCERS OF A CENTRAL CONTROL AND CONTROL UNIT FOR MACHINES AND / OR DEVICES USABLE IN PRODUCTION AND / OR PACKAGING LINES OF PRODUCTS
US4595914A (en) * 1983-04-11 1986-06-17 Pittway Corporation Self-testing combustion products detector
US4725818A (en) * 1985-09-13 1988-02-16 Simplex Time Recorder Co. Walk through test system
US4682153A (en) * 1985-10-23 1987-07-21 Amerace Corporation Fail-safe sensor system
JPH0827870B2 (en) * 1986-06-12 1996-03-21 綜合警備保障株式会社 Infrared type intruder detector
JPS6318498A (en) * 1986-07-10 1988-01-26 綜合警備保障株式会社 Infrared rays type invader detector
GB8701202D0 (en) * 1987-01-20 1987-02-25 Wakefield Health Authority Infra-red personal attack alarm system
FR2619467B1 (en) * 1987-08-14 1992-12-31 Biyong Boniface DEVICE FOR TRIGGERING AND REMOTE CONTROL OF AN ELECTRICAL, ELECTRONIC OR OTHER MEANS SUCH AS AN ALARM UNIT FOR REMOTE MONITORING OF ANY PROTECTION VOLUME AND EQUIPPED EQUIPMENT THEREOF
FR2647538A1 (en) * 1989-05-29 1990-11-30 Robert Cappa Monitoring device for a refrigeration installation
US5086526A (en) * 1989-10-10 1992-02-11 International Sanitary Ware Manufacturin Cy, S.A. Body heat responsive control apparatus
US5093656A (en) * 1990-03-12 1992-03-03 Dipoala William S Active supervision of motion-detection systems
DE4020175C2 (en) * 1990-06-25 1994-01-20 Waldemar Marinitsch Device for failsafe testing of an infrared sensor arrangement
US5077467A (en) * 1990-09-12 1991-12-31 Triad Controls, Inc. Photoelectric switch and relay system with disabling fail-safe monitoring circuitry
GB9107062D0 (en) * 1991-04-04 1991-05-22 Racal Guardall Scotland Intruder detection arrangements and methods
US5382944A (en) * 1992-08-05 1995-01-17 Detection Systems, Inc. Supervised PIR motion-detection system
US6501810B1 (en) 1998-10-13 2002-12-31 Agere Systems Inc. Fast frame synchronization
US5546074A (en) * 1993-08-19 1996-08-13 Sentrol, Inc. Smoke detector system with self-diagnostic capabilities and replaceable smoke intake canopy
FR2713373B1 (en) * 1993-12-03 1996-02-23 Jay Electronique Sa Security installation for the detection of human presence in dangerous areas.
US5640142A (en) * 1995-02-01 1997-06-17 Pittway Corporation Alarm system testing circuit
US5963850A (en) * 1996-12-06 1999-10-05 Pittway Corp. Method and apparatus for verifying the operability of a balanced diode mixer and local oscillator combination
CA2200994C (en) * 1997-03-25 2001-07-31 Digital Security Controls Ltd. Walk-test control circuit for security alarm device
US7225343B1 (en) * 2002-01-25 2007-05-29 The Trustees Of Columbia University In The City Of New York System and methods for adaptive model generation for detecting intrusions in computer systems
CN106023551B (en) * 2016-07-27 2017-07-07 沈阳奥森自动化装备有限公司 One kind simulation flame light source independent clock alarm self-checking circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553664A (en) * 1968-07-15 1971-01-05 Monsanto Co Monitoring apparatus
US3641549A (en) * 1970-06-25 1972-02-08 Sanders Associates Inc Electro-optical perimeter intrusion alarm
US3717864A (en) * 1971-11-02 1973-02-20 Teledyne Ind Periodic event detector system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240626B (en) * 1990-01-31 1993-09-29 Servo Corp Of America Integrity test for acoustic bearing defect detector
GB2255409A (en) * 1991-05-02 1992-11-04 C & K Systems Inc Audio intrusion detection system
GB2255409B (en) * 1991-05-02 1995-07-19 C & K Systems Inc An improved audio intrusion detection system
WO1993018492A1 (en) * 1992-03-09 1993-09-16 The Commonwealth Of Australia Infrared intrusion sensor
US5465080A (en) * 1992-03-09 1995-11-07 The Commonwealth Of Australia Infrared intrusion sensor

Also Published As

Publication number Publication date
DE2556864A1 (en) 1976-06-24
FR2295505A1 (en) 1976-07-16
JPS5185698A (en) 1976-07-27
US3928849A (en) 1975-12-23

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed