GB1511461A - Multi-zone intrusion detection system - Google Patents

Multi-zone intrusion detection system

Info

Publication number
GB1511461A
GB1511461A GB100876A GB100876A GB1511461A GB 1511461 A GB1511461 A GB 1511461A GB 100876 A GB100876 A GB 100876A GB 100876 A GB100876 A GB 100876A GB 1511461 A GB1511461 A GB 1511461A
Authority
GB
United Kingdom
Prior art keywords
zone
zones
doppler
modules
transmitting transducers
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
GB100876A
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.)
Pittway Corp
Original Assignee
Pittway Corp
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
Priority claimed from US05/542,695 external-priority patent/US3986182A/en
Application filed by Pittway Corp filed Critical Pittway Corp
Publication of GB1511461A publication Critical patent/GB1511461A/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
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

1511461 Doppler intruder-detector PITTWAY CORP 12 Jan 1976 [21 Jan 1975] 01008/76 Heading GIG [Also in Division G4] An intrusion detection system covering a plurality of separate zones comprises ultrasonic wave transmitting transducers for each zone, respective receivers for each zone, a master oscillator for driving all the transmitting transducers and to which all the receivers are coupled for producing individual Doppler signals indicative of moving objects in the respective zones, and indicators at a central location for selectively indicating each zone in which a moving object is located. In the Fig. 1 embodiment each zone is provided with several transmitting transducers 27 and receiving transducers 38. Receiving and signal processing circuits for two zones are contained in each of modules 21, 26. The system can be extended by adding further dual-zone modules. Master control 11 powers all the transmitting transducers and feeds a synchronizing signal to the modules for synchronous demodulation, within each module, of the receiving transducer signals. Each module, Fig. 2 (not shown) filters the demodulated signals for its two zones to extract desired Doppler frequencies and de-energizes a relay if the Doppler signal amplitude, integrated over a one second period, exceeds a threshold value. Respective alarms 42--45 are actuated by the relay de-energizations. Intrusion into any zone also actuates a general alarm 17 of audible or visual type locally, or remotely via a telephone line or other link. Provision is made for manual testing of the alarms.
GB100876A 1975-01-21 1976-01-12 Multi-zone intrusion detection system Expired GB1511461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/542,695 US3986182A (en) 1974-03-27 1975-01-21 Multi-zone intrusion detection system

Publications (1)

Publication Number Publication Date
GB1511461A true GB1511461A (en) 1978-05-17

Family

ID=24164901

Family Applications (1)

Application Number Title Priority Date Filing Date
GB100876A Expired GB1511461A (en) 1975-01-21 1976-01-12 Multi-zone intrusion detection system

Country Status (8)

Country Link
JP (1) JPS5197397A (en)
AU (1) AU502566B2 (en)
CA (1) CA1050652A (en)
DE (1) DE2600362A1 (en)
FR (1) FR2298839A1 (en)
GB (1) GB1511461A (en)
IT (1) IT1053395B (en)
NL (1) NL7600175A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010870A1 (en) * 1978-10-04 1980-05-14 Glynwed Group Services Limited Electronic lock and key, and an alarm system incorporating same
DE3428773A1 (en) * 1984-08-03 1986-02-13 Siemens AG, 1000 Berlin und 8000 München ULTRASONIC PROXIMITY INITIATOR
GB2179481B (en) * 1985-08-20 1989-08-02 Rentokil Ltd Pest detection apparatus and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680074A (en) * 1969-11-03 1972-07-25 Zeev Lieser Intrusion systems employing digital processing circuitry
US3781859A (en) * 1972-04-19 1973-12-25 Seabroad Electric Controlled wave pattern ultrasonic burglar alarm

Also Published As

Publication number Publication date
NL7600175A (en) 1976-07-23
AU502566B2 (en) 1979-08-02
DE2600362A1 (en) 1976-07-22
IT1053395B (en) 1981-08-31
FR2298839B1 (en) 1980-05-30
FR2298839A1 (en) 1976-08-20
CA1050652A (en) 1979-03-13
JPS5197397A (en) 1976-08-26
AU1205976A (en) 1977-09-22

Similar Documents

Publication Publication Date Title
GB1436025A (en) Breakage detector
GB1342552A (en) Intruder detection systems
GB1517602A (en) Apparatus for detecting the number of objects
NO770810L (en) SYSTEM FOR SEPARATING TRUE M} LOCO SIGNALS IN A PULSE DOPLER RADAR RECEIVER
ES472658A1 (en) Alarm system
GB1329194A (en) Apparatus for article theft detection
GB1392767A (en) Ultrasonic alarm circuit
GB1448336A (en) Intrusion detection system
JPS52146598A (en) Ultrasonic wave transmitter for burglar alarm system
WO1990013076A3 (en) A detection system for locating aircraft
GB1452499A (en) Electromagnetic intrustion detection system
ES8503874A1 (en) Motion detection systems.
GB1511461A (en) Multi-zone intrusion detection system
GB1169570A (en) Improvements in Remote Supervision Systems and Devices
GB1390913A (en) Monitoring systems
GB1308702A (en) Intrusion detection apparatus having supervisory control means
FR2386875A1 (en) Automatic monitoring system for old or infirm persons - has central transceiver to monitor signals from transceivers carried by individuals who require supervision
GB1239466A (en)
JPS5714771A (en) Sounding system of sonar
FR2341903A1 (en) TWO-WIRE SYSTEM INCLUDING A SIGNAL RECEPTION SECTION AND A DETECTION SECTION WITH A PROTECTED RELAY
FR2399702A1 (en) Bus service time interval separation control system - has transmitter-receiver in each bus, priority indicator at crossroads and display at bus stops
JPS535916A (en) Disturbance signal elimination unit
GB1506387A (en) Alarm indicator systems
GB1384598A (en) Alarm systems
FR2352354A1 (en) Evaluation circuit for signals from protection system - has circuit monitoring adaptors of ultrasonic movement detector based on Doppler principle

Legal Events

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