AU4621072A - An improved spatial alarm system - Google Patents

An improved spatial alarm system

Info

Publication number
AU4621072A
AU4621072A AU46210/72A AU4621072A AU4621072A AU 4621072 A AU4621072 A AU 4621072A AU 46210/72 A AU46210/72 A AU 46210/72A AU 4621072 A AU4621072 A AU 4621072A AU 4621072 A AU4621072 A AU 4621072A
Authority
AU
Australia
Prior art keywords
alarm system
improved spatial
spatial
improved
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
AU46210/72A
Inventor
Edgar John Shields Robert
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.)
Wormald Australia Pty Ltd
Original Assignee
Wormald Brothers Industries Ltd
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 Wormald Brothers Industries Ltd filed Critical Wormald Brothers Industries Ltd
Priority to AU46210/72A priority Critical patent/AU4621072A/en
Publication of AU4621072A publication Critical patent/AU4621072A/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
    • G08B13/1627—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using Doppler shift detection circuits
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
AU46210/72A 1971-09-02 1971-09-02 An improved spatial alarm system Expired AU4621072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46210/72A AU4621072A (en) 1971-09-02 1971-09-02 An improved spatial alarm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU46210/72A AU4621072A (en) 1971-09-02 1971-09-02 An improved spatial alarm system

Publications (1)

Publication Number Publication Date
AU4621072A true AU4621072A (en) 1974-03-07

Family

ID=3733296

Family Applications (1)

Application Number Title Priority Date Filing Date
AU46210/72A Expired AU4621072A (en) 1971-09-02 1971-09-02 An improved spatial alarm system

Country Status (1)

Country Link
AU (1) AU4621072A (en)

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