GB1222871A - Improvements in or relating to detection systems - Google Patents

Improvements in or relating to detection systems

Info

Publication number
GB1222871A
GB1222871A GB1902268A GB1902268A GB1222871A GB 1222871 A GB1222871 A GB 1222871A GB 1902268 A GB1902268 A GB 1902268A GB 1902268 A GB1902268 A GB 1902268A GB 1222871 A GB1222871 A GB 1222871A
Authority
GB
United Kingdom
Prior art keywords
amplifier
alarm
output
accumulator
mixer
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
GB1902268A
Other languages
English (en)
Inventor
James Leighton Palmer
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.)
ADVANCED DEVICES LAB Inc
Original Assignee
ADVANCED DEVICES LAB 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 ADVANCED DEVICES LAB Inc filed Critical ADVANCED DEVICES LAB Inc
Priority to GB1902268A priority Critical patent/GB1222871A/en
Priority to FR1561844D priority patent/FR1561844A/fr
Priority to NL6806785A priority patent/NL6806785A/xx
Publication of GB1222871A publication Critical patent/GB1222871A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)
GB1902268A 1968-04-23 1968-04-23 Improvements in or relating to detection systems Expired GB1222871A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1902268A GB1222871A (en) 1968-04-23 1968-04-23 Improvements in or relating to detection systems
FR1561844D FR1561844A (https=) 1968-04-23 1968-05-09
NL6806785A NL6806785A (https=) 1968-04-23 1968-05-14

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1902268A GB1222871A (en) 1968-04-23 1968-04-23 Improvements in or relating to detection systems
FR151104 1968-05-09
NL6806785A NL6806785A (https=) 1968-04-23 1968-05-14

Publications (1)

Publication Number Publication Date
GB1222871A true GB1222871A (en) 1971-02-17

Family

ID=27244832

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1902268A Expired GB1222871A (en) 1968-04-23 1968-04-23 Improvements in or relating to detection systems

Country Status (3)

Country Link
FR (1) FR1561844A (https=)
GB (1) GB1222871A (https=)
NL (1) NL6806785A (https=)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2165755A1 (https=) * 1971-12-29 1973-08-10 Sfim
GB2131547A (en) * 1982-12-02 1984-06-20 Lucas Ind Plc Motion detection systems
GB2144599A (en) * 1983-07-20 1985-03-06 Plessey Co Plc Distinguishing different types of movement
EP0833022A3 (de) * 1996-09-27 1998-10-14 Siemens Aktiengesellschaft Parkhaus für Kraftfahrzeuge
FR2966270A1 (fr) * 2009-05-14 2012-04-20 Finsecur Detecteur autonome declencheur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760400A (en) * 1972-02-10 1973-09-18 Aerospace Res Intrusion detection system employing quadrature sampling
NL8102059A (nl) * 1981-04-27 1982-11-16 Univ Leiden Inrichting en werkwijze voor het kwantitatief beoordelen van onwillekeurige lichaamsbewegingen.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2165755A1 (https=) * 1971-12-29 1973-08-10 Sfim
GB2131547A (en) * 1982-12-02 1984-06-20 Lucas Ind Plc Motion detection systems
EP0113512A3 (en) * 1982-12-02 1984-12-12 Lucas Industries Public Limited Company Motion detection systems
GB2144599A (en) * 1983-07-20 1985-03-06 Plessey Co Plc Distinguishing different types of movement
EP0833022A3 (de) * 1996-09-27 1998-10-14 Siemens Aktiengesellschaft Parkhaus für Kraftfahrzeuge
FR2966270A1 (fr) * 2009-05-14 2012-04-20 Finsecur Detecteur autonome declencheur

Also Published As

Publication number Publication date
NL6806785A (https=) 1969-11-18
FR1561844A (https=) 1969-03-28

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