NL136631B - - Google Patents

Info

Publication number
NL136631B
NL136631B NL136631DA NL136631B NL 136631 B NL136631 B NL 136631B NL 136631D A NL136631D A NL 136631DA NL 136631 B NL136631 B NL 136631B
Authority
NL
Netherlands
Application number
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 of NL136631B publication Critical patent/NL136631B/xx

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
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/583—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • 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
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/343—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using sawtooth modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
NL136631D 1944-03-20 NL136631B (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5207/44A GB580752A (en) 1944-03-20 1944-03-20 Improvements in or relating to radio altimeters

Publications (1)

Publication Number Publication Date
NL136631B true NL136631B (fr)

Family

ID=9791722

Family Applications (2)

Application Number Title Priority Date Filing Date
NL136631D NL136631B (fr) 1944-03-20
NL69846D NL69846C (fr) 1944-03-20

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL69846D NL69846C (fr) 1944-03-20

Country Status (5)

Country Link
US (1) US2495795A (fr)
BE (1) BE477480A (fr)
FR (1) FR939287A (fr)
GB (1) GB580752A (fr)
NL (2) NL69846C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE478697A (fr) * 1944-06-08
US2673461A (en) * 1949-05-02 1954-03-30 Gibbs Mfg And Res Corp Hairspring vibrating apparatus
US20060258519A1 (en) * 2002-10-09 2006-11-16 Corepole, Inc. Circular fitness apparatus and method

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206903A (en) * 1940-07-09 Radiant energy distance measuring
US649008A (en) * 1899-01-09 1900-05-08 Gen Electric Frequency-indicator.
DE219067C (fr) * 1908-07-12 1910-02-14
US1665857A (en) * 1919-07-10 1928-04-10 Needham John Cuthbert Electrical transmission system
US1902496A (en) * 1931-05-27 1933-03-21 Gen Electric High frequency measurement
US2051018A (en) * 1934-03-28 1936-08-11 Gen Electric Speed ratio indicating device
GB471731A (en) * 1935-12-04 1937-09-06 Eric Lawrence Casling White Improvements in and relating to pulse-operated thermionic valve apparatus, such for example as frequency dividers, electrical counting arrangements and the like
US2120303A (en) * 1936-04-03 1938-06-14 Telefunken Gmbh Gain control device
FR959092A (fr) * 1938-09-30 1950-03-23
US2222586A (en) * 1939-01-28 1940-11-19 Rca Corp Radio altimeter
CH219436A (de) * 1939-03-31 1942-02-15 Guanella Gustav Ing Dipl Verfahren und Einrichtung zur Kontrolle der Entfernung mit frequenzmodulierten Schwingungen.
NL60726C (fr) * 1939-09-01
US2248727A (en) * 1939-12-09 1941-07-08 Howard M Strobel Signaling system
NL60039C (fr) * 1939-12-30
US2371988A (en) * 1940-10-01 1945-03-20 Aga Baltic Ab Distance measuring device
US2307316A (en) * 1941-02-13 1943-01-05 Rca Corp Frequency meter
US2324077A (en) * 1941-12-27 1943-07-13 Rca Corp Measuring circuit
US2405134A (en) * 1942-08-03 1946-08-06 Brush Dev Co Distance measuring system

Also Published As

Publication number Publication date
GB580752A (en) 1946-09-18
BE477480A (fr)
NL69846C (fr)
FR939287A (fr) 1948-11-09
US2495795A (en) 1950-01-31

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