BE477480A - - Google Patents
Info
- Publication number
- BE477480A BE477480A BE477480DA BE477480A BE 477480 A BE477480 A BE 477480A BE 477480D A BE477480D A BE 477480DA BE 477480 A BE477480 A BE 477480A
- Authority
- BE
- Belgium
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)
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 |
---|---|
BE477480A true BE477480A (de) |
Family
ID=9791722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE477480D BE477480A (de) | 1944-03-20 |
Country Status (5)
Country | Link |
---|---|
US (1) | US2495795A (de) |
BE (1) | BE477480A (de) |
FR (1) | FR939287A (de) |
GB (1) | GB580752A (de) |
NL (2) | NL69846C (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR957724A (de) * | 1944-06-08 | 1950-02-24 | ||
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)
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 (de) * | 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 |
NL137955B (de) * | 1938-09-30 | |||
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 (de) * | 1939-09-01 | |||
US2248727A (en) * | 1939-12-09 | 1941-07-08 | Howard M Strobel | Signaling system |
NL60039C (de) * | 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 |
-
0
- BE BE477480D patent/BE477480A/xx unknown
- NL NL136631D patent/NL136631B/xx unknown
- NL NL69846D patent/NL69846C/xx active
-
1944
- 1944-03-20 GB GB5207/44A patent/GB580752A/en not_active Expired
-
1945
- 1945-05-11 US US593159A patent/US2495795A/en not_active Expired - Lifetime
-
1946
- 1946-08-29 FR FR939287D patent/FR939287A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR939287A (fr) | 1948-11-09 |
NL69846C (de) | |
US2495795A (en) | 1950-01-31 |
GB580752A (en) | 1946-09-18 |
NL136631B (de) |