GB959140A - Improvements in or relating to arrangements for detecting objects - Google Patents

Improvements in or relating to arrangements for detecting objects

Info

Publication number
GB959140A
GB959140A GB3736756A GB3736756A GB959140A GB 959140 A GB959140 A GB 959140A GB 3736756 A GB3736756 A GB 3736756A GB 3736756 A GB3736756 A GB 3736756A GB 959140 A GB959140 A GB 959140A
Authority
GB
United Kingdom
Prior art keywords
intruder
amplitude
dec
detected
receiver
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
GB3736756A
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.)
MICHAEL NORTON GRENIER GOLDSMI
NEWPORT INSTRUMENTS SCIENTIFIC AND MOBILE Ltd
Original Assignee
MICHAEL NORTON GRENIER GOLDSMI
NEWPORT INSTRUMENTS SCIENTIFIC AND MOBILE 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 MICHAEL NORTON GRENIER GOLDSMI, NEWPORT INSTRUMENTS SCIENTIFIC AND MOBILE Ltd filed Critical MICHAEL NORTON GRENIER GOLDSMI
Priority to GB3736756A priority Critical patent/GB959140A/en
Publication of GB959140A publication Critical patent/GB959140A/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
    • 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
    • G01S13/003—Bistatic radar systems; Multistatic radar systems
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G01S13/825—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted with exchange of information between interrogator and responder
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

959,140. Burglar alarms. NEWPORT INSTRUMENTS (SCIENTIFIC & MOBILE) Ltd., and M. N. G. GOLDSMITH. Dec. 3,1957 [Dec. 6, 1956], No. 37367/56. Drawings to Specification. Heading G4N. Intruders are detected by transmitting a substantially constant amplitude radio wave to a receiver that detects amplitude changes (preferably only those which occur at a frequency greater than 0.5 cycles per second) and which amplitude modulates a further transmitter only when an intruder is detected. A similar receiver is used to detect the second signal and to give an alarm initiating output on any amplitude change. The system may be in the form of a closed ring and a plurality of links may be provided. Each transmitter may provide a unique code signal on intruder detection to assist in locating the intruder.
GB3736756A 1956-12-06 1956-12-06 Improvements in or relating to arrangements for detecting objects Expired GB959140A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3736756A GB959140A (en) 1956-12-06 1956-12-06 Improvements in or relating to arrangements for detecting objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3736756A GB959140A (en) 1956-12-06 1956-12-06 Improvements in or relating to arrangements for detecting objects

Publications (1)

Publication Number Publication Date
GB959140A true GB959140A (en) 1964-05-27

Family

ID=10395916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3736756A Expired GB959140A (en) 1956-12-06 1956-12-06 Improvements in or relating to arrangements for detecting objects

Country Status (1)

Country Link
GB (1) GB959140A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2256926A1 (en) * 1972-11-21 1974-05-30 Schomandl Kg ROOM MONITORING DEVICE
US3815131A (en) * 1971-11-29 1974-06-04 Sperry Rand Corp Cw surveillance radar system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815131A (en) * 1971-11-29 1974-06-04 Sperry Rand Corp Cw surveillance radar system
DE2256926A1 (en) * 1972-11-21 1974-05-30 Schomandl Kg ROOM MONITORING DEVICE

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