CA496981A - Electrical apparatus for detecting the presence of moving objects - Google Patents

Electrical apparatus for detecting the presence of moving objects

Info

Publication number
CA496981A
CA496981A CA496981A CA496981DA CA496981A CA 496981 A CA496981 A CA 496981A CA 496981 A CA496981 A CA 496981A CA 496981D A CA496981D A CA 496981DA CA 496981 A CA496981 A CA 496981A
Authority
CA
Canada
Prior art keywords
detecting
electrical apparatus
moving objects
objects
moving
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
CA496981A
Other languages
English (en)
French (fr)
Inventor
Collard John
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.)
Electrical and Musical Industries Ltd
Original Assignee
Electrical and Musical 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.)
Publication date
Priority claimed from GB77541A external-priority patent/GB594634A/en
Application granted granted Critical
Publication of CA496981A publication Critical patent/CA496981A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00Cathode ray tubes; Electron beam tubes
    • H01J31/02Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S13/00Systems 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
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50Systems of measurement based on relative movement of target
    • G01S13/52Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/522Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves
    • G01S13/524Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
CA496981A 1941-01-20 Electrical apparatus for detecting the presence of moving objects Expired CA496981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB77541A GB594634A (en) 1941-01-20 Improvements in or relating to electrical apparatus for detecting the presence of moving objects

Publications (1)

Publication Number Publication Date
CA496981A true CA496981A (en) 1953-10-20

Family

ID=9710309

Family Applications (1)

Application Number Title Priority Date Filing Date
CA496981A Expired CA496981A (en) 1941-01-20 Electrical apparatus for detecting the presence of moving objects

Country Status (6)

Country Link
US (1) US2591919A (en:Method)
AU (1) AU131340B2 (en:Method)
CA (1) CA496981A (en:Method)
CH (1) CH264014A (en:Method)
FR (1) FR955986A (en:Method)
NL (1) NL74179C (en:Method)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1046074A (fr) * 1951-12-01 1953-12-03 Csf Dispositif de détection électromagnétique d'obstacles
NL196467A (en:Method) * 1954-04-16
US2841740A (en) * 1955-11-21 1958-07-01 Ibm Convertible storage systems
DE1148163B (de) * 1959-09-24 1963-05-02 Atlas Werke Ag Verfahren zur Unterscheidung zwischen ruhenden und bewegten Objekten bei der Echolotung
US3885240A (en) * 1967-06-27 1975-05-20 Us Navy Storage radar system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1750668A (en) * 1927-12-08 1930-03-18 American Telephone & Telegraph Determining movement and position of moving objects
BE421006A (en:Method) * 1936-04-09
US2193361A (en) * 1936-04-09 1940-03-12 Gen Electric High frequency apparatus
US2189549A (en) * 1938-03-18 1940-02-06 Rca Corp Antenna switching system
US2403625A (en) * 1940-08-16 1946-07-09 Rca Corp Drift indicator

Also Published As

Publication number Publication date
NL74179C (en:Method)
US2591919A (en) 1952-04-08
CH264014A (de) 1949-09-30
AU131340B2 (en) 1949-02-11
FR955986A (en:Method) 1950-01-23

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